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Prof. Thomas C.-K. Yang
Department of Chemical Engineering and Biotechnology, National Taipei University of Technology, Taipei 106, Taiwan

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Research Keywords & Expertise

0 Flexible Materials for Wearable Technology and Barrier Coating
0 Development and Application of Infrared Technology and its Materials
0 Semiconductor Process and Microelectronic Packaging
0 Bio-Medical Materials& BioMEMS
0 Techniques for Nanomaterial Manufacturing

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Journal article
Published: 11 August 2021 in Nanomaterials
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A highly mesoporous graphitic carbon nitride g-C3N4 (GCN) has been produced by a template-free method and effectively photodegrade tetracycline (TC) antibiotic under solar light irradiation. The mesoporous GCN (GCN-500) greatly improves the photoactivity (0.0247 min−1) by 2.13 times, as compared to that of bulk GCN (0.0116 min−1). The efficiently strengthened photoactivity is ascribed to the high porosity (117.05 m2/g), and improves the optical absorption under visible light (Eg = 2.65 eV) and good charge carrier separation efficiency. The synthesized mesoporous GCN shows a uniform pore size (~3 nm) distribution. GCN-500 shows large pore volume (0.210 cm3/g) compared to GCN-B (0.083 cm3/g). Besides, the GCN-500 also exhibits good recyclability and photostability for TC photodegradation. In conclusion, GCN-500 is a recyclable photocatalyst for the removal of TC under visible light irradiation.

ACS Style

Bao Lee Phoon; Chin Wei Lai; Guan-Ting Pan; Thomas C.-K. Yang; Joon Ching Juan. Highly Mesoporous g-C3N4 with Uniform Pore Size Distribution via the Template-Free Method to Enhanced Solar-Driven Tetracycline Degradation. Nanomaterials 2021, 11, 2041 .

AMA Style

Bao Lee Phoon, Chin Wei Lai, Guan-Ting Pan, Thomas C.-K. Yang, Joon Ching Juan. Highly Mesoporous g-C3N4 with Uniform Pore Size Distribution via the Template-Free Method to Enhanced Solar-Driven Tetracycline Degradation. Nanomaterials. 2021; 11 (8):2041.

Chicago/Turabian Style

Bao Lee Phoon; Chin Wei Lai; Guan-Ting Pan; Thomas C.-K. Yang; Joon Ching Juan. 2021. "Highly Mesoporous g-C3N4 with Uniform Pore Size Distribution via the Template-Free Method to Enhanced Solar-Driven Tetracycline Degradation." Nanomaterials 11, no. 8: 2041.

Journal article
Published: 08 August 2021 in Journal of Environmental Chemical Engineering
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Semiconductors with abundant surface areas have received substantial attention in the field of sensors, especially for the specific and sensitive detection of molecules. Eco-friendly synthesis of metal oxides pn junction composite with high specific surface area and its photoelectrochemical monitoring on antibiotics have been reported. The ZnO-Co3O4 pn heterojunction composite has successfully been prepared from a metal-organic framework (MOF) as a template, using benzene tricarboxylic acid (BTC) with a one-step calcination process. In research, obtained nanorods like ZnO-Co3O4 pn heterojunction exhibited high conductivity with excellent stability for the facilitated photocatalytic performance towards the photoelectrochemical detection of sulfadiazine (SDZ). Photo-stability and the optical characteristics of the ZnO-Co3O4 heterojunction composite have been analyzed in photocurrent and UV–visible studies. A mechanism of SDZ signaling has been proposed with appropriate band levels derived by Mott-Schottky analysis. The proposed sensor detects SDZ in the range of 0.005–18.5 µM with 1.2 nM as detection limit and exhibits better signaling stability. The applicability of the sensor device has been tested in pork meat, human urine, and river water samples containing SDZ.

ACS Style

Sethupathi Velmurugan; Thomas C.-K. Yang; Shih-Wen Chen; Jyy-Ning Chen. Metal-organic frameworks derived ZnO-Co3O4 pn heterojunction photocatalyst for the photoelectrochemical detection of sulfadiazine. Journal of Environmental Chemical Engineering 2021, 9, 106169 .

AMA Style

Sethupathi Velmurugan, Thomas C.-K. Yang, Shih-Wen Chen, Jyy-Ning Chen. Metal-organic frameworks derived ZnO-Co3O4 pn heterojunction photocatalyst for the photoelectrochemical detection of sulfadiazine. Journal of Environmental Chemical Engineering. 2021; 9 (5):106169.

Chicago/Turabian Style

Sethupathi Velmurugan; Thomas C.-K. Yang; Shih-Wen Chen; Jyy-Ning Chen. 2021. "Metal-organic frameworks derived ZnO-Co3O4 pn heterojunction photocatalyst for the photoelectrochemical detection of sulfadiazine." Journal of Environmental Chemical Engineering 9, no. 5: 106169.

Journal article
Published: 20 July 2021 in Journal of Colloid and Interface Science
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A rapid, cost-effective and accurate detection of heavy metal ions is crucial for human health monitoring and environmental protection. Surface-enhanced Raman spectroscopy (SERS) has become a reliable method due to its outstanding performance for the identification of contaminants. In this paper, silver phosphate microcubes (Ag3PO4) were fabricated using two different precipitation methods for ultrasensitive SERS detection of heavy metal ions. The use of an organic linker (BPy) with Ag3PO4 enabled the immobilization of Hg2+ and Pb2+ ions. The formation of Ag3PO4 was confirmed by XRD, UV-DRS, FESEM coupled with EDX and HRTEM. The analytical enhancement factor (AEF) obtained was 1010 with a detection limit of 10-15 M indicating high sensitivity. Based on these results, the possible SERS mechanism has been proposed and discussed. Moreover, an excellent reusability of Ag3PO4 substrate for at least four cycles was achieved upon the light exposure on heavy metal loaded substrate due to its superior catalytic ability for the degradation of heavy metal ions. The as-prepared substrate demonstrated remarkable stability, selectivity and SERS sensitivity towards real samples. The results conclude that Ag3PO4 microcubes offer a great prospect in recyclable SERS applications.

ACS Style

Surabhi Kamal; Thomas Chung-Kuang Yang. Silver enriched silver phosphate microcubes as an efficient recyclable SERS substrate for the detection of heavy metal ions. Journal of Colloid and Interface Science 2021, 605, 173 -181.

AMA Style

Surabhi Kamal, Thomas Chung-Kuang Yang. Silver enriched silver phosphate microcubes as an efficient recyclable SERS substrate for the detection of heavy metal ions. Journal of Colloid and Interface Science. 2021; 605 ():173-181.

Chicago/Turabian Style

Surabhi Kamal; Thomas Chung-Kuang Yang. 2021. "Silver enriched silver phosphate microcubes as an efficient recyclable SERS substrate for the detection of heavy metal ions." Journal of Colloid and Interface Science 605, no. : 173-181.

Journal article
Published: 23 June 2021 in Processes
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A rechargeable zinc-air battery shows great promise because of its high energy density, low cost, greater safety, and its environment-friendly properties. However, rechargeable zinc-air battery development has been hindered by the lack of a satisfactory bi-functional electrode. In this research, we report on a solution which uses electro-deposition to dope nickel into manganese on the stainless-steel mesh. The result shows the hydroxyl group on the prepared samples improving its oxygen reduction reaction and oxygen evolution reaction performance, as well as boosting the ion diffusion rate and stabilizing the zinc-air battery charge-discharge performance (overall potential gap dropped from 0.84 V to 0.82 V after 1000 cycles). This study contributes to our understanding of a new method for the improvement of bi-functional electrodes.

ACS Style

Anuradha Chowdhury; Kuan-Ching Lee; Mitchell Wei Lim; Kuan-Lun Pan; Jyy Chen; SiewHui Chong; Chao-Ming Huang; Guan-Ting Pan; Thomas Yang. The Zinc-Air Battery Performance with Ni-Doped MnO2 Electrodes. Processes 2021, 9, 1087 .

AMA Style

Anuradha Chowdhury, Kuan-Ching Lee, Mitchell Wei Lim, Kuan-Lun Pan, Jyy Chen, SiewHui Chong, Chao-Ming Huang, Guan-Ting Pan, Thomas Yang. The Zinc-Air Battery Performance with Ni-Doped MnO2 Electrodes. Processes. 2021; 9 (7):1087.

Chicago/Turabian Style

Anuradha Chowdhury; Kuan-Ching Lee; Mitchell Wei Lim; Kuan-Lun Pan; Jyy Chen; SiewHui Chong; Chao-Ming Huang; Guan-Ting Pan; Thomas Yang. 2021. "The Zinc-Air Battery Performance with Ni-Doped MnO2 Electrodes." Processes 9, no. 7: 1087.

Research article
Published: 07 June 2021 in ACS Applied Materials & Interfaces
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Replacement of an expensive anode electrocatalyst in proton exchange membrane water electrolysis is of great importance. Recently explored Co3O4 shows good activity and stability toward oxygen evolution reaction (OER) in acid; however, the stability is not adequately explained. Lack of such information delays the design of an acid-stable OER electrocatalyst. Here, we investigate the structural origin of cobalt dissolution by various local atomic configurations of Co3O4. Operando Raman studies and voltammetric data reveal that chemical reduction of the CoO2 intermediate accompanied by lattice oxygen loss leads to undercoordinated CoO sites, which then react with water and form an amorphous three-dimensional (3D) porous network of CoO(OH)x, called the hydrous oxide layer (HOL). Growth of HOL mainly depends on the oxygen vacancies and near-surface OI– that impair the crystalline integrity and favor dissolution. These insights provide a fundamental relation between OER activity and stability and offer a specific guideline for the electrocatalyst design.

ACS Style

Karikalan Natarajan; Elavarasan Munirathinam; Thomas C. K. Yang. Operando Investigation of Structural and Chemical Origin of Co3O4 Stability in Acid under Oxygen Evolution Reaction. ACS Applied Materials & Interfaces 2021, 13, 27140 -27148.

AMA Style

Karikalan Natarajan, Elavarasan Munirathinam, Thomas C. K. Yang. Operando Investigation of Structural and Chemical Origin of Co3O4 Stability in Acid under Oxygen Evolution Reaction. ACS Applied Materials & Interfaces. 2021; 13 (23):27140-27148.

Chicago/Turabian Style

Karikalan Natarajan; Elavarasan Munirathinam; Thomas C. K. Yang. 2021. "Operando Investigation of Structural and Chemical Origin of Co3O4 Stability in Acid under Oxygen Evolution Reaction." ACS Applied Materials & Interfaces 13, no. 23: 27140-27148.

Review
Published: 03 June 2021 in Processes
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Microbial fuel cell (MFC) technology has attracted a great amount of attention due to its potential for organic and inorganic waste treatment concomitant with power generation. It is thus seen as a clean energy alternative. Modifications and innovations have been conducted on standalone and hybrid/coupled MFC systems to improve the power output to meet the end goal, namely, commercialization and implementation into existing wastewater treatment plants. As the energy generated is inversely proportional to the size of the reactor, the stacking method has been proven to boost the power output from MFC. In recent years, stacked or scale-up MFCs have also been used as a power source to provide off-grid energy, as well as for in situ assessments. These scale-up studies, however, encountered various challenges, such as cell voltage reversal. This review paper explores recent scale-up studies, identifies trends and challenges, and provides a framework for current and future research.

ACS Style

Wei Tan; SiewHui Chong; Hsu-Wei Fang; Kuan-Lun Pan; Mardawani Mohamad; Jun Lim; Timm Tiong; Yi Chan; Chao-Ming Huang; Thomas Yang. Microbial Fuel Cell Technology—A Critical Review on Scale-Up Issues. Processes 2021, 9, 985 .

AMA Style

Wei Tan, SiewHui Chong, Hsu-Wei Fang, Kuan-Lun Pan, Mardawani Mohamad, Jun Lim, Timm Tiong, Yi Chan, Chao-Ming Huang, Thomas Yang. Microbial Fuel Cell Technology—A Critical Review on Scale-Up Issues. Processes. 2021; 9 (6):985.

Chicago/Turabian Style

Wei Tan; SiewHui Chong; Hsu-Wei Fang; Kuan-Lun Pan; Mardawani Mohamad; Jun Lim; Timm Tiong; Yi Chan; Chao-Ming Huang; Thomas Yang. 2021. "Microbial Fuel Cell Technology—A Critical Review on Scale-Up Issues." Processes 9, no. 6: 985.

Journal article
Published: 22 March 2021 in Materials Science in Semiconductor Processing
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The tremendously usage in batteries has led to development of safe, economical and environment friendly batteries. Therefore, the progress to explore new type of battery such as rechargeable alkaline zinc batteries (RAZBs) based on metal oxides has attracted many interests. In this study, RAZBs based on SrTiO3 nanoparticles as cathode is successfully produced and also managed to generate high specific volume capacity of 387 mAh cm−3 at 1.2 V. Based on the total volume of battery, the energy density of the battery is 37 mWh cm−3. The SrTiO3 prepared via facile hydrothermal process exhibits large specific surface area. Besides the surface area, the presence of oxygen vacancies (Vo¨) in SrTiO3 is also contributed to the high electron contact efficiency. The presence of Vo¨ play an important role in the redox property and rechargeability of SrTiO3 as cathode. The RAZBs based on SrTiO3 nanoparticles shows a good cycling performance and achieve 100% coulombic efficiency. In conclusion, the new cathode material based on SrTiO3 create new possibilities for RAZBs.

ACS Style

Christelle Pau Ping Wong; Chin Wei Lai; Kian Mun Lee; Guan Ting Pan; Kok Boon Chong; Mohd Rafie Johan; Joon Ching Juan; Thomas Chung Kuang Yang. A high-capacity of oxygen induced SrTiO3 cathode material for rechargeable Alkaline Zinc battery. Materials Science in Semiconductor Processing 2021, 130, 105802 .

AMA Style

Christelle Pau Ping Wong, Chin Wei Lai, Kian Mun Lee, Guan Ting Pan, Kok Boon Chong, Mohd Rafie Johan, Joon Ching Juan, Thomas Chung Kuang Yang. A high-capacity of oxygen induced SrTiO3 cathode material for rechargeable Alkaline Zinc battery. Materials Science in Semiconductor Processing. 2021; 130 ():105802.

Chicago/Turabian Style

Christelle Pau Ping Wong; Chin Wei Lai; Kian Mun Lee; Guan Ting Pan; Kok Boon Chong; Mohd Rafie Johan; Joon Ching Juan; Thomas Chung Kuang Yang. 2021. "A high-capacity of oxygen induced SrTiO3 cathode material for rechargeable Alkaline Zinc battery." Materials Science in Semiconductor Processing 130, no. : 105802.

Journal article
Published: 19 March 2021 in Journal of Colloid and Interface Science
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Herein this research, a visible light active tungsten oxide/copper manganate (WO3/CuMnO2) p-n heterojunction nanocomposite was prepared and has been applied for a signal on photoelectrochemical sensing of antibiotic nitrofurazone (NFZ). Firstly, the n-WO3 nanotiles were synthesized from the cetrimonium bromide (CTAB) assisted hydrothermal method and the p-CuMnO2 nanoparticles were synthesized by using the ultrasound-assisted hydrothermal method. The photoelectrochemical NFZ sensing performance of WO3/CuMnO2 nanocomposite was 1.9 times higher than that of as-synthesized pure WO3 nanotiles. The resulting higher photoelectrochemical performance of the nanocomposite is due to more visible light absorption ability and synergy from p-n heterojunction formation. The designed WO3/CuMnO2 nanocomposite sensor gives satisfactory photocurrent signals for the detection of NFZ in the range of 0.015 – 32 μM with the detection limit (LOD) of 1.19 nM. The practical applicability of the nanocomposite sensor was monitored in pork liver and tap water samples.

ACS Style

Sethupathi Velmurugan; Thomas C.-K. Yang; Joon Ching Juan; Jyy-Ning Chen. Preparation of novel nanostructured WO3/CuMnO2 p-n heterojunction nanocomposite for photoelectrochemical detection of nitrofurazone. Journal of Colloid and Interface Science 2021, 596, 108 -118.

AMA Style

Sethupathi Velmurugan, Thomas C.-K. Yang, Joon Ching Juan, Jyy-Ning Chen. Preparation of novel nanostructured WO3/CuMnO2 p-n heterojunction nanocomposite for photoelectrochemical detection of nitrofurazone. Journal of Colloid and Interface Science. 2021; 596 ():108-118.

Chicago/Turabian Style

Sethupathi Velmurugan; Thomas C.-K. Yang; Joon Ching Juan; Jyy-Ning Chen. 2021. "Preparation of novel nanostructured WO3/CuMnO2 p-n heterojunction nanocomposite for photoelectrochemical detection of nitrofurazone." Journal of Colloid and Interface Science 596, no. : 108-118.

Journal article
Published: 11 March 2021 in Journal of the Taiwan Institute of Chemical Engineers
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This work reports an efficient method to prepare In2O3/TiO2 heterojunction photocatalysts containing different micro-structures including nanorods (ITNR) and nanocubes (ITNC) with a coordination chemical approach followed by thermal treatments. The as-prepared materials were characterized by various physicochemical tests, to verify the structural properties and the associated photocatalytic properties. In addition, malachite green (MG) dye and ethanol were used to examine their photooxidation properties. Both experiments demonstrated the photocatalytic activity of the as-prepared samples were in the order of ITNC > ITNR > TiO2 > In2O3. This tendency implied that the formation of semiconductor-semiconductor heterojunction in ITNC and ITNR. Reduced the lower recombination rate of electron-hole pair, along with the lower electrical resistance, and higher OH adsorption sites. In addition, ITNC has a larger surface area and a wide absorption spectrum under visible light region than that of the ITNR. The scavenger study of dye degradation shows that more than 70% of the MG dye was degraded through OH radicals, which was further confirmed by the diffuse reflectance infrared Fourier transform spectroscopy (DRIFT). The results illustrated the adsorbed gas-phase ethanol was converted to CO2 and H2O through different reaction pathways, which revealed that both surface-adsorbed OH radicals and the photogenerated holes were contributed to the higher photocatalytic activity.

ACS Style

Munirathinam Elavarasan; Kasimayan Uma; Thomas C.-K. Yang. Nanocubes phase adaptation of In2O3/TiO2 heterojunction photocatalysts for the dye degradation and tracing of adsorbed species during photo-oxidation of ethanol. Journal of the Taiwan Institute of Chemical Engineers 2021, 120, 169 -177.

AMA Style

Munirathinam Elavarasan, Kasimayan Uma, Thomas C.-K. Yang. Nanocubes phase adaptation of In2O3/TiO2 heterojunction photocatalysts for the dye degradation and tracing of adsorbed species during photo-oxidation of ethanol. Journal of the Taiwan Institute of Chemical Engineers. 2021; 120 ():169-177.

Chicago/Turabian Style

Munirathinam Elavarasan; Kasimayan Uma; Thomas C.-K. Yang. 2021. "Nanocubes phase adaptation of In2O3/TiO2 heterojunction photocatalysts for the dye degradation and tracing of adsorbed species during photo-oxidation of ethanol." Journal of the Taiwan Institute of Chemical Engineers 120, no. : 169-177.

Journal article
Published: 28 January 2021 in Scientific Reports
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Random lasers had been made by some biomaterials as light scattering materials, but natural photonic crystals have been rarely reported as scattering materials. Here we demonstrate the ability of natural photonic crystals to drive laser actions by sandwiched the feathers of the Turquoise-Fronted Amazon parrot and dye between two plastic films. Parrot feathers comprise abundant photonic crystals, and different color feathers compose of different ratios of the photonic crystal, which directly affect the feather reflectance. In this study, the multi-reflection scattering that occurred at the interface between the photonic crystal and gain media efficiently reduce the threshold; therefore, the more photonic crystal constitutes in the feathers; the lower threshold can be obtained. The random lasers can be easily made by the integration of bird feather photonic crystals and dye with a simple and sustainable manufacturing approach.

ACS Style

Shih-Wen Chen; Jin-You Lu; Po-Han Tung; Ja-Hon Lin; Matteo Chiesa; Bing-Yi Hung; Thomas Chung-Kuang Yang. Study of laser actions by bird’s feathers with photonic crystals. Scientific Reports 2021, 11, 1 -6.

AMA Style

Shih-Wen Chen, Jin-You Lu, Po-Han Tung, Ja-Hon Lin, Matteo Chiesa, Bing-Yi Hung, Thomas Chung-Kuang Yang. Study of laser actions by bird’s feathers with photonic crystals. Scientific Reports. 2021; 11 (1):1-6.

Chicago/Turabian Style

Shih-Wen Chen; Jin-You Lu; Po-Han Tung; Ja-Hon Lin; Matteo Chiesa; Bing-Yi Hung; Thomas Chung-Kuang Yang. 2021. "Study of laser actions by bird’s feathers with photonic crystals." Scientific Reports 11, no. 1: 1-6.

Journal article
Published: 27 January 2021 in Chemosphere
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Tetracycline (TC), a popularly found drug pollutant, can be contaminated in food and aquatic regions and causes a severe impact on human health. In this research, a visible light active p-stannic oxide/n-copper manganate (p-SnO2/n-CuMnO2) heterojunction was synthesized and has been applied for a signal on photoelectrochemical sensing of antibiotic TC. Firstly, the n-SnO2 microrods were synthesized via a simple and efficient homogeneous precipitation method and the p-CuMnO2 nanoparticles were synthesized by a facile ultrasound-assisted hydrothermal method. The SnO2/CuMnO2 microrods p-n heterojunction was prepared through a simple impregnation method and physicochemical properties of the microrods are characterized by using X-ray diffraction (XRD), Raman, Brunauer-Emmett-Teller (BET), Fourier-transform infrared (FTIR), UV–Vis diffuse reflectance spectroscopy (UVDRS), X-ray photoelectron spectroscopy (XPS), field emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), and Mott-Schottky analyses. The photoelectrochemical sensing performance of SnO2/CuMnO2 microrods was 2.7 times higher than that of as-synthesized pure SnO2 microrods is due to the more visible light absorption ability and p-n heterojunction (synergy). The designed SnO2/CuMnO2/ITO sensor gives photocurrent signals for the detection of TC in the range of 0.01–1000 μM with the detection limit (LOD) of 5.6 nM. The practical applicability of the sensor was monitored in cow milk and the Taipei River water sample.

ACS Style

Sethupathi Velmurugan; Liu Zhi-Xiang; Thomas C-K Yang; Joon Ching Juan. Rational design of built-in stannic oxide-copper manganate microrods p-n heterojunction for photoelectrochemical sensing of tetracycline. Chemosphere 2021, 271, 129788 .

AMA Style

Sethupathi Velmurugan, Liu Zhi-Xiang, Thomas C-K Yang, Joon Ching Juan. Rational design of built-in stannic oxide-copper manganate microrods p-n heterojunction for photoelectrochemical sensing of tetracycline. Chemosphere. 2021; 271 ():129788.

Chicago/Turabian Style

Sethupathi Velmurugan; Liu Zhi-Xiang; Thomas C-K Yang; Joon Ching Juan. 2021. "Rational design of built-in stannic oxide-copper manganate microrods p-n heterojunction for photoelectrochemical sensing of tetracycline." Chemosphere 271, no. : 129788.

Paper
Published: 28 December 2020 in Nanoscale Advances
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Improved photocatalytic activity of highly expanded MoS2 under visible light emitting diode.

ACS Style

Magdeline Tze Leng Lai; Kian Mun Lee; Thomas Chung Kuang Yang; Guan Ting Pan; Chin Wei Lai; Chia-Yun Chen; Mohd Rafie Johan; Joon Ching Juan. The improved photocatalytic activity of highly expanded MoS2 under visible light emitting diodes. Nanoscale Advances 2020, 3, 1106 -1120.

AMA Style

Magdeline Tze Leng Lai, Kian Mun Lee, Thomas Chung Kuang Yang, Guan Ting Pan, Chin Wei Lai, Chia-Yun Chen, Mohd Rafie Johan, Joon Ching Juan. The improved photocatalytic activity of highly expanded MoS2 under visible light emitting diodes. Nanoscale Advances. 2020; 3 (4):1106-1120.

Chicago/Turabian Style

Magdeline Tze Leng Lai; Kian Mun Lee; Thomas Chung Kuang Yang; Guan Ting Pan; Chin Wei Lai; Chia-Yun Chen; Mohd Rafie Johan; Joon Ching Juan. 2020. "The improved photocatalytic activity of highly expanded MoS2 under visible light emitting diodes." Nanoscale Advances 3, no. 4: 1106-1120.

Journal article
Published: 24 December 2020 in Microchemical Journal
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In recent times, there has been an outburst of research in the field of surface-enhanced Raman spectroscopy (SERS) for detecting trace-level molecules. The usability of plasmonic metal–organic framework serves as one of the fascinating approaches for high-performance SERS substrate. In this study, a silver trimesate organic framework [{Ag(H2btc)}{Ag2(Hbtc)}]n (H3btc = 1,3,5-trimesic acid) (Ag-BTC) was synthesized via co-precipitation method. The formation of Ag-BTC was confirmed by, X-ray powder diffraction, differential reflectance spectroscopy (UV-DRS), Field emission scanning electron microscope coupled with EDS, Transmission electron microscopy, Thermogravimetric analysis, Brunauer–Emmett–Teller and X-ray photoelectron spectroscopy. The Ag-BTC1 exhibits high SERS sensitivity for the detection of R6G, RB and MB. The morphology of the Ag-BTC with numerous corners and edges provides high-density hotspot with enhanced EM-field. The characterization shows that the combination of localized surface plasmon resonance properties of Ag with high adsorption ability and remarkable structural versatility of organic framework induces ultrasensitive detection of various dye molecules. The analytical enhancement factor (AEF) was 107 (R6G), 106 (RB) and 105 (MB). The limit of detection of 10-13 M for R6G and 10-11 M for RB and MB shows good sensitivity. The excellent uniformity (RSD < 15%) was also observed. It is presumed from the results that Ag-BTC1 is a promising material for various SERS applications.

ACS Style

Surabhi Kamal; Thomas Chung-Kuang Yang. A silver trimesate organic framework as an ultrasensitive surface-enhanced Raman scattering substrate for detection of various organic pollutants. Microchemical Journal 2020, 163, 105896 .

AMA Style

Surabhi Kamal, Thomas Chung-Kuang Yang. A silver trimesate organic framework as an ultrasensitive surface-enhanced Raman scattering substrate for detection of various organic pollutants. Microchemical Journal. 2020; 163 ():105896.

Chicago/Turabian Style

Surabhi Kamal; Thomas Chung-Kuang Yang. 2020. "A silver trimesate organic framework as an ultrasensitive surface-enhanced Raman scattering substrate for detection of various organic pollutants." Microchemical Journal 163, no. : 105896.

Review
Published: 17 November 2020 in Applied Biochemistry and Biotechnology
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Microbial fuel cell (MFC) is a promising technology that utilizes exoelectrogens cultivated in the form of biofilm to generate power from various types of sources supplied. A metal-reducing pathway is utilized by these organisms to transfer electrons obtained from the metabolism of substrate from anaerobic respiration extracellularly. A widely established model organism that is capable of extracellular electron transfer (EET) is Shewanella oneidensis. This review highlights the strategies used in the transformation of S. oneidensis and the recent development of MFC in terms of intervention through genetic modifications. S. oneidensis was genetically engineered for several aims including the study on the underlying mechanisms of EET, and the enhancement of power generation and wastewater treating potential when used in an MFC. Through engineering S. oneidensis, genes responsible for EET are identified and strategies on enhancing the EET efficiency are studied. Overexpressing genes related to EET to enhance biofilm formation, mediator biosynthesis, and respiration appears as one of the common approaches.

ACS Style

Dexter Hoi Long Leung; Yin Sze Lim; Kasimayan Uma; Guan-Ting Pan; Ja-Hon Lin; SiewHui Chong; Thomas Chung-Kuang Yang. Engineering S. oneidensis for Performance Improvement of Microbial Fuel Cell—a Mini Review. Applied Biochemistry and Biotechnology 2020, 193, 1170 -1186.

AMA Style

Dexter Hoi Long Leung, Yin Sze Lim, Kasimayan Uma, Guan-Ting Pan, Ja-Hon Lin, SiewHui Chong, Thomas Chung-Kuang Yang. Engineering S. oneidensis for Performance Improvement of Microbial Fuel Cell—a Mini Review. Applied Biochemistry and Biotechnology. 2020; 193 (4):1170-1186.

Chicago/Turabian Style

Dexter Hoi Long Leung; Yin Sze Lim; Kasimayan Uma; Guan-Ting Pan; Ja-Hon Lin; SiewHui Chong; Thomas Chung-Kuang Yang. 2020. "Engineering S. oneidensis for Performance Improvement of Microbial Fuel Cell—a Mini Review." Applied Biochemistry and Biotechnology 193, no. 4: 1170-1186.

Journal article
Published: 04 September 2020 in Molecules
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A series of heteroatom-containing porous carbons with high surface area and hierarchical porosity were successfully prepared by hydrothermal, chemical activation, and carbonization processes from soybean residues. The initial concentration of soybean residues has a significant impact on the textural and surface functional properties of the obtained biomass-derived porous carbons (BDPCs). SRAC5 sample with a BET surface area of 1945 m2 g−1 and a wide micro/mesopore size distribution, nitrogen content of 3.8 at %, and oxygen content of 15.8 at % presents the best electrochemical performance, reaching 489 F g−1 at 1 A g−1 in 6 M LiNO3 aqueous solution. A solid-state symmetric supercapacitor (SSC) device delivers a specific capacitance of 123 F g−1 at 1 A g−1 and a high energy density of 68.2 Wh kg−1 at a power density of 1 kW kg−1 with a wide voltage window of 2.0 V and maintains good cycling stability of 89.9% capacitance retention at 2A g−1 (over 5000 cycles). The outstanding electrochemical performances are ascribed to the synergistic effects of the high specific surface area, appropriate pore distribution, favorable heteroatom functional groups, and suitable electrolyte, which facilitates electrical double-layer and pseudocapacitive mechanisms for power and energy storage, respectively.

ACS Style

Hsiu-Ying Chung; Guan-Ting Pan; Zhong-Yun Hong; Chun-Tsung Hsu; SiewHui Chong; Thomas Chung-Kuang Yang; Chao-Ming Huang. Biomass-Derived Porous Carbons Derived from Soybean Residues for High Performance Solid State Supercapacitors. Molecules 2020, 25, 4050 .

AMA Style

Hsiu-Ying Chung, Guan-Ting Pan, Zhong-Yun Hong, Chun-Tsung Hsu, SiewHui Chong, Thomas Chung-Kuang Yang, Chao-Ming Huang. Biomass-Derived Porous Carbons Derived from Soybean Residues for High Performance Solid State Supercapacitors. Molecules. 2020; 25 (18):4050.

Chicago/Turabian Style

Hsiu-Ying Chung; Guan-Ting Pan; Zhong-Yun Hong; Chun-Tsung Hsu; SiewHui Chong; Thomas Chung-Kuang Yang; Chao-Ming Huang. 2020. "Biomass-Derived Porous Carbons Derived from Soybean Residues for High Performance Solid State Supercapacitors." Molecules 25, no. 18: 4050.

Research article
Published: 03 August 2020 in ACS Applied Electronic Materials
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The construction of solar active photoelectrodes for photoelectrochemical purposes based on a heterojunction platform is one of the most promising strategies. Herein, a molybdenum disulfide-graphitic carbon nitride (MoS2-GCN) p-n heterojunction stabilized reduced graphene oxide/indium tin oxide (rGO/ITO) photoelectrode was fabricated and have been employed for the photoelectrochemical detection of the neurotransmitter dopamine (DA). Firstly, the rGO was electrochemically reduced on ITO slice in GO dispersion (pH = 7, -1.5 – 0 V potential window for 30 cycles) by using the cyclic voltammetry technique, and then MoS2-GCN heterostructure was immobilized on rGO/ITO by the drop-casting method. The physicochemical characterization of the fabricated electrodes was carried out by means of XRD, Raman, UV-vis DRS, EIS, PL, and SEM techniques. The type of MoS2 and GCN semiconductors and the p-n heterojunction formation between the MoS2 and GCN were investigated through the Hall Effect and Mott-Schottky analyses. The fabricated electrode shows an enhanced photocurrent activity at 535 nm which is confirmed from the UV-DRS measurement. The MoS2-GCN/rGO/ITO shows photoelectrochemical detection activity of dopamine in the linear response of 0.005-1271.93 µM with the detection limit of 1.6 nM. This MoS2-GCN/rGO/ITO electrode was tested for the determination of dopamine in human urine and serum samples.

ACS Style

Sethupathi Velmurugan; Thomas Chung-Kuang Yang. Fabrication of High-Performance Molybdenum Disulfide–Graphitic Carbon Nitride p–n Heterojunction Stabilized rGO/ITO Photoelectrode for Photoelectrochemical Determination of Dopamine. ACS Applied Electronic Materials 2020, 2, 1 .

AMA Style

Sethupathi Velmurugan, Thomas Chung-Kuang Yang. Fabrication of High-Performance Molybdenum Disulfide–Graphitic Carbon Nitride p–n Heterojunction Stabilized rGO/ITO Photoelectrode for Photoelectrochemical Determination of Dopamine. ACS Applied Electronic Materials. 2020; 2 (9):1.

Chicago/Turabian Style

Sethupathi Velmurugan; Thomas Chung-Kuang Yang. 2020. "Fabrication of High-Performance Molybdenum Disulfide–Graphitic Carbon Nitride p–n Heterojunction Stabilized rGO/ITO Photoelectrode for Photoelectrochemical Determination of Dopamine." ACS Applied Electronic Materials 2, no. 9: 1.

Journal article
Published: 06 July 2020 in Journal of the Taiwan Institute of Chemical Engineers
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Combining hierarchical nickel–cobalt oxides (NCO) with cost-effective glucose-based carbons could be attractive electrode materials for high-performance supercapacitor. The bimetallic nickel (Ni) and cobalt (Co) hydroxide was directly electrodeposited for 120, 180, 300, 480, and 600 s, respectively, on a conductive Ni foam as the NCO/Ni electrodes. The (NCO/Ni)-480 electrode showed the highest capacitance among NCO/Ni electrodes. Furthermore, an asymmetric supercapacitor (ASC) was assembled by utilizing (NCO/Ni)-480 as a positive electrode and glucose-based activated-carbon coated on Ni foam, (G-AC)/Ni, as a negative electrode in solid state carboxymethyl cellulose-lithium nitrate (CMC-LiNO3) gel electrolyte. At the potential window of 1.5 V, the device exhibits a prominent energy density of 45.3 Wh kg−1 at a power density of 0.743 kW kg−1 (1 A g−1) and excellent cycling stability of 89.7% of the initial capacity retention over 10,000 cycles. The outstanding electrochemical performances of the ASC can be ascribed to the synergistic effect of hierarchical Ni–Co oxides, mesoporous G-AC, three-dimensional Ni foam collector, and binder-free preparation, which facilitates a faster diffusion of the electrolyte ion into the electrode material and provides a stronger adhesion of active materials with the current collector.

ACS Style

Elangovan Erusappan; Guan-Ting Pan; Hsiu-Ying Chung; SiewHui Chong; Sivakumar Thiripuranthagan; Thomas Chung-Kuang Yang; Chao-Ming Huang. Hierarchical nickel–cobalt oxide and glucose-based carbon electrodes for asymmetric supercapacitor with high energy density. Journal of the Taiwan Institute of Chemical Engineers 2020, 112, 330 -336.

AMA Style

Elangovan Erusappan, Guan-Ting Pan, Hsiu-Ying Chung, SiewHui Chong, Sivakumar Thiripuranthagan, Thomas Chung-Kuang Yang, Chao-Ming Huang. Hierarchical nickel–cobalt oxide and glucose-based carbon electrodes for asymmetric supercapacitor with high energy density. Journal of the Taiwan Institute of Chemical Engineers. 2020; 112 ():330-336.

Chicago/Turabian Style

Elangovan Erusappan; Guan-Ting Pan; Hsiu-Ying Chung; SiewHui Chong; Sivakumar Thiripuranthagan; Thomas Chung-Kuang Yang; Chao-Ming Huang. 2020. "Hierarchical nickel–cobalt oxide and glucose-based carbon electrodes for asymmetric supercapacitor with high energy density." Journal of the Taiwan Institute of Chemical Engineers 112, no. : 330-336.

Journal article
Published: 30 April 2020 in Crystals
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This report presents the synthesis of ZnO nanorod/α-Fe2O3 composites by the hydrothermal method with different weight percentages of α-Fe2O3 nanoparticles. The as-synthesized nanorod composites were characterized by different techniques, such as X-ray diffraction (XRD), Fourier transform-infrared (FT-IR), field emission scanning electron microscopy (FE-SEM), electrochemical impedance spectroscopy (EIS), and X-ray photoelectron spectroscopy (XPS). From our results, it was found that the ZnO/α-Fe2O3 (3 wt%) nanorod composites exhibit a higher hydrogen evolution reaction (HER) activity when compared to other composites. The synergetic effect between ZnO and (3 wt%) of α-Fe2O3 nanocomposites resulted in a low onset potential of −125 mV, which can effectively produce more H2 than pure ZnO. The H2 production rate over the composite of ZnO/α-Fe2O3 (3 wt%) clearly shows a significant improvement in the photocatalytic activity in the heterojunction of the ZnO nanorods and α-Fe2O3 nanoparticles on nickel foam.

ACS Style

Kasimayan Uma; Elavarasan Muniranthinam; SiewHui Chong; Thomas C.-K Yang; Ja-Hon Lin. Fabrication of Hybrid Catalyst ZnO Nanorod/α-Fe2O3 Composites for Hydrogen Evolution Reaction. Crystals 2020, 10, 356 .

AMA Style

Kasimayan Uma, Elavarasan Muniranthinam, SiewHui Chong, Thomas C.-K Yang, Ja-Hon Lin. Fabrication of Hybrid Catalyst ZnO Nanorod/α-Fe2O3 Composites for Hydrogen Evolution Reaction. Crystals. 2020; 10 (5):356.

Chicago/Turabian Style

Kasimayan Uma; Elavarasan Muniranthinam; SiewHui Chong; Thomas C.-K Yang; Ja-Hon Lin. 2020. "Fabrication of Hybrid Catalyst ZnO Nanorod/α-Fe2O3 Composites for Hydrogen Evolution Reaction." Crystals 10, no. 5: 356.

Journal article
Published: 29 April 2020 in Polymers
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The superlative mechanical properties of spider silk and its conspicuous variations have instigated significant interest over the past few years. However, current attempts to synthetically spin spider silk fibers often yield an inferior physical performance, owing to the improper molecular interactions of silk proteins. Considering this, herein, a post-treatment process to reorganize molecular structures and improve the physical strength of spider silk is reported. The major ampullate dragline silk from Nephila pilipes with a high β-sheet content and an adequate tensile strength was utilized as the study material, while that from Cyrtophora moluccensis was regarded as a reference. Our results indicated that the hydrothermal post-treatment (50–70 °C) of natural spider silk could effectively induce the alternation of secondary structures (random coil to β-sheet) and increase the overall tensile strength of the silk. Such advantageous post-treatment strategy when applied to regenerated spider silk also leads to an increment in the strength by ~2.5–3.0 folds, recapitulating ~90% of the strength of native spider silk. Overall, this study provides a facile and effective post-spinning means for enhancing the molecular structures and mechanical properties of as-spun silk threads, both natural and regenerated.

ACS Style

Hsuan-Chen Wu; Aditi Pandey; Liang-Yu Chang; Chieh-Yun Hsu; Thomas Chung-Kuang Yang; I-Min Tso; Hwo-Shuenn Sheu; Jen-Chang Yang. Hydrothermal Effect on Mechanical Properties of Nephila pilipes Spidroin. Polymers 2020, 12, 1013 .

AMA Style

Hsuan-Chen Wu, Aditi Pandey, Liang-Yu Chang, Chieh-Yun Hsu, Thomas Chung-Kuang Yang, I-Min Tso, Hwo-Shuenn Sheu, Jen-Chang Yang. Hydrothermal Effect on Mechanical Properties of Nephila pilipes Spidroin. Polymers. 2020; 12 (5):1013.

Chicago/Turabian Style

Hsuan-Chen Wu; Aditi Pandey; Liang-Yu Chang; Chieh-Yun Hsu; Thomas Chung-Kuang Yang; I-Min Tso; Hwo-Shuenn Sheu; Jen-Chang Yang. 2020. "Hydrothermal Effect on Mechanical Properties of Nephila pilipes Spidroin." Polymers 12, no. 5: 1013.

Journal article
Published: 18 April 2020 in Ceramics International
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Herein, we report the cost-effective synthesis of P90–TiO2/g-C3N4 hybrid nanocomposite with enhanced optical and electrochemical properties through the surface disorder modifications for photocatalysis and electrochemical sensors. Ultrasound irradiation (37 kHz/150 W) was employed for the hydroxylation on P90–TiO2 and exfoliation of g-C3N4 (CN), using a probe sonication technique. Several analytical and spectroscopic techniques were applied to investigate the physicochemical and optical properties of the prepared materials. The Sunset Yellow FCF (SSY) and phenol (PhOH) were used as hazardous organic pollutants to evaluate the photocatalytic activities. Under simulated solar irradiation, the 40wt% UL-P90/CN photocatalyst exhibited 98.8%, and 99.35% degradations of SSY and PhOH within 5 min and 120 min, respectively. In addition, the photogenerated charge separation and an interfacial charge transferability were confirmed by photoelectrochemical measurements. Additionally, the electrochemical detection of SSY in the presence of 40wt% UL-P90/CN resulted in excellent sensitivity (1.029 μAμM−1cm−2), a broad linear range of detection (0.01–319 μM), and relatively low detection limit (4 nM). Therefore, the as-prepared 40wt% UL-P90/CN nanocomposite can be used as an efficient catalyst material for photocatalysis and sensor applications.

ACS Style

Sridharan Balu; Yi-Lun Chen; Thomas C.-K. Yang; Jyy-Ning Chen; Shih-Wen Chen. Effect of ultrasound-induced hydroxylation and exfoliation on P90–TiO2/g-C3N4 hybrids with enhanced optoelectronic properties for visible-light photocatalysis and electrochemical sensing. Ceramics International 2020, 46, 18002 -18018.

AMA Style

Sridharan Balu, Yi-Lun Chen, Thomas C.-K. Yang, Jyy-Ning Chen, Shih-Wen Chen. Effect of ultrasound-induced hydroxylation and exfoliation on P90–TiO2/g-C3N4 hybrids with enhanced optoelectronic properties for visible-light photocatalysis and electrochemical sensing. Ceramics International. 2020; 46 (11):18002-18018.

Chicago/Turabian Style

Sridharan Balu; Yi-Lun Chen; Thomas C.-K. Yang; Jyy-Ning Chen; Shih-Wen Chen. 2020. "Effect of ultrasound-induced hydroxylation and exfoliation on P90–TiO2/g-C3N4 hybrids with enhanced optoelectronic properties for visible-light photocatalysis and electrochemical sensing." Ceramics International 46, no. 11: 18002-18018.