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A comprehensive review of low-cost top-down approaches to enhance the electrochemical performance of silicon anodes, including future research directions.
Ansor Prima Yuda; Pierre Yosia Edward Koraag; Ferry Iskandar; Hutomo Suryo Wasisto; Afriyanti Sumboja. Advances of the top-down synthesis approach for high-performance silicon anodes in Li-ion batteries. Journal of Materials Chemistry A 2021, 1 .
AMA StyleAnsor Prima Yuda, Pierre Yosia Edward Koraag, Ferry Iskandar, Hutomo Suryo Wasisto, Afriyanti Sumboja. Advances of the top-down synthesis approach for high-performance silicon anodes in Li-ion batteries. Journal of Materials Chemistry A. 2021; ():1.
Chicago/Turabian StyleAnsor Prima Yuda; Pierre Yosia Edward Koraag; Ferry Iskandar; Hutomo Suryo Wasisto; Afriyanti Sumboja. 2021. "Advances of the top-down synthesis approach for high-performance silicon anodes in Li-ion batteries." Journal of Materials Chemistry A , no. : 1.
Early expansion of graphite after H2SO4/H2O2 pre-treatment and cyclic voltammograms of exfoliated graphite (EG) prepared with various volume fractions of H2O2.
Oktaviardi Bityasmawan Abdillah; Octia Floweri; Tirta Rona Mayangsari; Sigit Puji Santosa; Takashi Ogi; Ferry Iskandar. Effect of H2SO4/H2O2 pre-treatment on electrochemical properties of exfoliated graphite prepared by an electro-exfoliation method. RSC Advances 2021, 11, 10881 -10890.
AMA StyleOktaviardi Bityasmawan Abdillah, Octia Floweri, Tirta Rona Mayangsari, Sigit Puji Santosa, Takashi Ogi, Ferry Iskandar. Effect of H2SO4/H2O2 pre-treatment on electrochemical properties of exfoliated graphite prepared by an electro-exfoliation method. RSC Advances. 2021; 11 (18):10881-10890.
Chicago/Turabian StyleOktaviardi Bityasmawan Abdillah; Octia Floweri; Tirta Rona Mayangsari; Sigit Puji Santosa; Takashi Ogi; Ferry Iskandar. 2021. "Effect of H2SO4/H2O2 pre-treatment on electrochemical properties of exfoliated graphite prepared by an electro-exfoliation method." RSC Advances 11, no. 18: 10881-10890.
By rationally designing and modifying their heterostructures, carbon dots have the potential to be used as solar absorbers for solar evaporation. The roles of carbon dots to improve solar-to-vapor efficiency are thoroughly discussed.
Indriyati; Indah Primadona; Fitri Aulia Aulia Permatasari; Muhammad Alief Irham; Eng. Muhamad Nasir; Ferry Iskandar. Recent advances and rational design strategies of carbon dots towards highly efficient solar evaporation. Nanoscale 2021, 13, 7523 -7532.
AMA StyleIndriyati, Indah Primadona, Fitri Aulia Aulia Permatasari, Muhammad Alief Irham, Eng. Muhamad Nasir, Ferry Iskandar. Recent advances and rational design strategies of carbon dots towards highly efficient solar evaporation. Nanoscale. 2021; 13 (16):7523-7532.
Chicago/Turabian StyleIndriyati; Indah Primadona; Fitri Aulia Aulia Permatasari; Muhammad Alief Irham; Eng. Muhamad Nasir; Ferry Iskandar. 2021. "Recent advances and rational design strategies of carbon dots towards highly efficient solar evaporation." Nanoscale 13, no. 16: 7523-7532.
In this study, the electrical properties of exfoliated graphite (EG) with copper addition is reported. Firstly, EG samples were synthesized using electrochemical exfoliation of the pre-treated graphite sheet then combined with various copper concentrations. X-Ray Diffraction (XRD) characterization indicated that the composites of EG, Cu, and Cu2O were formed. A higher Cu2O amount obtained when the higher concentration of copper precursor was added in the EG. Scanning Electron Microscopy (SEM) images showed that more particles with larger sizes were anchored on the EG surface as higher copper concentration. The electrical properties of the samples were measured using the four-point probe method. The highest electrical conductivity of 37.86 S/cm was produced in the EG sample with 1 wt.% of copper addition. The result reveals that the optimum copper addition can increase the electrical properties of EG.
Eka Sulistyaningsih; Oktaviardi Bityasmawan Abdillah; Retno Maharsi; Octia Floweri; Ferry Iskandar. Electrical Properties of Electrochemically Exfoliated Graphite with Copper Addition. Journal of Physics: Conference Series 2021, 1811, 012042 .
AMA StyleEka Sulistyaningsih, Oktaviardi Bityasmawan Abdillah, Retno Maharsi, Octia Floweri, Ferry Iskandar. Electrical Properties of Electrochemically Exfoliated Graphite with Copper Addition. Journal of Physics: Conference Series. 2021; 1811 (1):012042.
Chicago/Turabian StyleEka Sulistyaningsih; Oktaviardi Bityasmawan Abdillah; Retno Maharsi; Octia Floweri; Ferry Iskandar. 2021. "Electrical Properties of Electrochemically Exfoliated Graphite with Copper Addition." Journal of Physics: Conference Series 1811, no. 1: 012042.
Valuable metals from spent LIBs can be recovered through acid leaching and co-precipitation process. In this study, citric acid was used as a leaching agent to extract Li, Co, Ni, and Mn ions from LiNi1/3Co1/3Mn1/3O2 (NCM 111) active material by adding sucrose as a reducing agent. Addition of sucrose was able to increase the efficiency of metal ions leaching. Transition metal ions in the filtrate are then co-precipitated by adding oxalic acid to obtain metal-oxalate salt. Organic acids leaching and oxalate co-precipitation process were able to recover valuable metals from spent LIBs through an environmentally friendly procedure.
Septia Refly; Octia Floweri; Tirta R. Mayangsari; Akfiny H. Aimon; Ferry Iskandar. Green recycle processing of cathode active material from LiNi1/3Co1/3Mn1/3O2 (NCM 111) battery waste through citric acid leaching and oxalate co-precipitation process. Materials Today: Proceedings 2021, 44, 3378 -3380.
AMA StyleSeptia Refly, Octia Floweri, Tirta R. Mayangsari, Akfiny H. Aimon, Ferry Iskandar. Green recycle processing of cathode active material from LiNi1/3Co1/3Mn1/3O2 (NCM 111) battery waste through citric acid leaching and oxalate co-precipitation process. Materials Today: Proceedings. 2021; 44 ():3378-3380.
Chicago/Turabian StyleSeptia Refly; Octia Floweri; Tirta R. Mayangsari; Akfiny H. Aimon; Ferry Iskandar. 2021. "Green recycle processing of cathode active material from LiNi1/3Co1/3Mn1/3O2 (NCM 111) battery waste through citric acid leaching and oxalate co-precipitation process." Materials Today: Proceedings 44, no. : 3378-3380.
In this study, we added polyvinyl alcohol (PVA) as a composite polymer to PEO based SPEs, with a varied amount of LiOH addition. The homogeneous solution was cast to form a thin and transparent SPE membrane. Characterization by X-ray Diffraction (XRD) revealed the semi-crystalline properties of all samples. Ionic conductivity of SPEs composites was determined through AC impedance measurement using Electrochemical Impedance Spectroscopy (EIS). The study revealed that the addition of LiOH showed higher ionic conductivity (2.18 × 10−5 S.cm−1) than the sample made of pure PEO/PVA composite (1.56 × 10−5 S.cm−1).
Rakhmawati M. Putri; Octia Floweri; Tirta R. Mayangsari; Akfiny H. Aimon; Ferry Iskandar. Preliminary study of electrochemical properties of polyethylene oxide (PEO) and polyvinyl alcohol (PVA) composites as material for solid polymer electrolyte. Materials Today: Proceedings 2021, 44, 3375 -3377.
AMA StyleRakhmawati M. Putri, Octia Floweri, Tirta R. Mayangsari, Akfiny H. Aimon, Ferry Iskandar. Preliminary study of electrochemical properties of polyethylene oxide (PEO) and polyvinyl alcohol (PVA) composites as material for solid polymer electrolyte. Materials Today: Proceedings. 2021; 44 ():3375-3377.
Chicago/Turabian StyleRakhmawati M. Putri; Octia Floweri; Tirta R. Mayangsari; Akfiny H. Aimon; Ferry Iskandar. 2021. "Preliminary study of electrochemical properties of polyethylene oxide (PEO) and polyvinyl alcohol (PVA) composites as material for solid polymer electrolyte." Materials Today: Proceedings 44, no. : 3375-3377.
Organic-inorganic CH3NH3PbBr3 perovskite nanoparticle has emerged as highly promising semiconductor materials for photovoltaic and optoelectronic applications such as solar cells, light-emitting diodes (LEDs), and other luminescent devices because of their optical properties and electrical conductivity. The optical properties of perovskite can be manipulated when bulk structures change into lower-dimensional structures to obtain the desired optical properties. However, perovskite suffers from a stability problem that makes it degrade quickly. Fumed silica (SiO2) is one of the complementary materials that is expected to improve the photoluminescence stability of perovskite. In this study, we added fumed silica (SiO2) as a composite material to CH3NH3PbBr3 perovskite nanoparticle, with a varied precipitation temperature prepared by ligand-assisted reprecipitation method (LARP). A preliminary study of the SiO2 effects was conducted based on the photoluminescence (PL) characterization using a fluorescence spectrophotometer, and UV–Vis spectroscopy. The precipitation temperature produced different luminescence’s ranging from blue to bright green along with rising temperatures (490–530) nm. UV–vis characterization showed CH3NH3PbBr3 perovskite nanoparticles absorb the light at a wavelength of around 400–550 nm. Stability characterization showed the CH3NH3PbBr3-SiO2 remained intense without quenching for two days and the CH3NH3PbBr3 perovskite nanoparticles without SiO2 was quenched through ambient exposure for 2 min. This indicates the addition of SiO2 improved the photoluminescence stability of the CH3NH3PbBr3 perovskite nanoparticles.
Hilma E. Masitoh; Fitri A. Permatasari; Bebeh W. Nuryadin; Akfiny H. Aimon; Ferry Iskandar. Photoluminescence stability of CH3NH3PbBr3 perovskite nanoparticles by adding SiO2: Preliminary study. Materials Today: Proceedings 2021, 44, 3309 -3312.
AMA StyleHilma E. Masitoh, Fitri A. Permatasari, Bebeh W. Nuryadin, Akfiny H. Aimon, Ferry Iskandar. Photoluminescence stability of CH3NH3PbBr3 perovskite nanoparticles by adding SiO2: Preliminary study. Materials Today: Proceedings. 2021; 44 ():3309-3312.
Chicago/Turabian StyleHilma E. Masitoh; Fitri A. Permatasari; Bebeh W. Nuryadin; Akfiny H. Aimon; Ferry Iskandar. 2021. "Photoluminescence stability of CH3NH3PbBr3 perovskite nanoparticles by adding SiO2: Preliminary study." Materials Today: Proceedings 44, no. : 3309-3312.
We report a rapid growth of the CH3NH3PbCl3 single crystal through microwave irradiation.
Moch Wisnu Arif Sektiono; Fitri Aulia Permatasari; Akfiny Hasdi Aimon; Ferry Iskandar. Rapid growth of the CH3NH3PbCl3 single crystal by microwave irradiation. RSC Advances 2021, 11, 1360 -1366.
AMA StyleMoch Wisnu Arif Sektiono, Fitri Aulia Permatasari, Akfiny Hasdi Aimon, Ferry Iskandar. Rapid growth of the CH3NH3PbCl3 single crystal by microwave irradiation. RSC Advances. 2021; 11 (3):1360-1366.
Chicago/Turabian StyleMoch Wisnu Arif Sektiono; Fitri Aulia Permatasari; Akfiny Hasdi Aimon; Ferry Iskandar. 2021. "Rapid growth of the CH3NH3PbCl3 single crystal by microwave irradiation." RSC Advances 11, no. 3: 1360-1366.
Carbon-based Quantum dots (C-QDs) are carbon-based materials that experience the quantum confinement effect, which results in superior optoelectronic properties. In recent years, C-QDs have attracted attention significantly and have shown great application potential as a high-performance supercapacitor device. C-QDs (either as a bare electrode or composite) give a new way to boost supercapacitor performances in higher specific capacitance, high energy density, and good durability. This review comprehensively summarizes the up-to-date progress in C-QD applications either in a bare condition or as a composite with other materials for supercapacitors. The current state of the three distinct C-QD families used for supercapacitors including carbon quantum dots, carbon dots, and graphene quantum dots is highlighted. Two main properties of C-QDs (structural and electrical properties) are presented and analyzed, with a focus on the contribution to supercapacitor performances. Finally, we discuss and outline the remaining major challenges and future perspectives for this growing field with the hope of stimulating further research progress.
Fitri Aulia Permatasari; Muhammad Alief Irham; Satria Zulkarnaen Bisri; Ferry Iskandar. Carbon-Based Quantum Dots for Supercapacitors: Recent Advances and Future Challenges. Nanomaterials 2021, 11, 91 .
AMA StyleFitri Aulia Permatasari, Muhammad Alief Irham, Satria Zulkarnaen Bisri, Ferry Iskandar. Carbon-Based Quantum Dots for Supercapacitors: Recent Advances and Future Challenges. Nanomaterials. 2021; 11 (1):91.
Chicago/Turabian StyleFitri Aulia Permatasari; Muhammad Alief Irham; Satria Zulkarnaen Bisri; Ferry Iskandar. 2021. "Carbon-Based Quantum Dots for Supercapacitors: Recent Advances and Future Challenges." Nanomaterials 11, no. 1: 91.
Most solid polymer electrolytes (SPEs) still suffer from low ionic conductivity at room temperature, which may be caused by the inhomogeneity of polymer blend and Li-salt. Here, polyethylene oxide (PEO), polyvinyl alcohol (PVA), and lithium hydroxide (LiOH) SPEs were prepared by an ultrasonic method to improve the ionic conductivity and shorten the synthesis time. This procedure has successfully yielded a flexible, transparent, and homogeneous SPEs, which were thermally stable at fairly high temperature as revealed from thermogravimetric analysis (TGA). These samples also showed relatively high ionic conductivity at room temperature with the highest conductivity of 1.25 × 10−4 S/cm and low activation energy of 0.253 eV demonstrated by sample with 2 wt% LiOH loading. Moreover, this sample was also stable in the measured voltage range, i.e., -5 to 5 V. DFT calculation showed that strong intermolecular charge transfer was present in the interaction between Li+ ion with PVA and PEO chain.
Rakhmawati M. Putri; Citra D.D. Sundari; Octia Floweri; Tirta R. Mayangsari; Atthar L. Ivansyah; Sigit P. Santosa; I M. Arcana; Ferry Iskandar. PEO/PVA/LiOH Solid Polymer Electrolyte Prepared via Ultrasound-assisted Solution Cast Method. Journal of Non-Crystalline Solids 2020, 556, 120549 .
AMA StyleRakhmawati M. Putri, Citra D.D. Sundari, Octia Floweri, Tirta R. Mayangsari, Atthar L. Ivansyah, Sigit P. Santosa, I M. Arcana, Ferry Iskandar. PEO/PVA/LiOH Solid Polymer Electrolyte Prepared via Ultrasound-assisted Solution Cast Method. Journal of Non-Crystalline Solids. 2020; 556 ():120549.
Chicago/Turabian StyleRakhmawati M. Putri; Citra D.D. Sundari; Octia Floweri; Tirta R. Mayangsari; Atthar L. Ivansyah; Sigit P. Santosa; I M. Arcana; Ferry Iskandar. 2020. "PEO/PVA/LiOH Solid Polymer Electrolyte Prepared via Ultrasound-assisted Solution Cast Method." Journal of Non-Crystalline Solids 556, no. : 120549.
Septia Refly; Octia Floweri; Tirta R. Mayangsari; Afriyanti Sumboja; Sigit Puji Santosa; Takashi Ogi; Ferry Iskandar. Regeneration of LiNi1/3Co1/3Mn1/3O2 Cathode Active Materials from End-of-Life Lithium-Ion Batteries through Ascorbic Acid Leaching and Oxalic Acid Coprecipitation Processes. ACS Sustainable Chemistry & Engineering 2020, 8, 1 .
AMA StyleSeptia Refly, Octia Floweri, Tirta R. Mayangsari, Afriyanti Sumboja, Sigit Puji Santosa, Takashi Ogi, Ferry Iskandar. Regeneration of LiNi1/3Co1/3Mn1/3O2 Cathode Active Materials from End-of-Life Lithium-Ion Batteries through Ascorbic Acid Leaching and Oxalic Acid Coprecipitation Processes. ACS Sustainable Chemistry & Engineering. 2020; 8 (43):1.
Chicago/Turabian StyleSeptia Refly; Octia Floweri; Tirta R. Mayangsari; Afriyanti Sumboja; Sigit Puji Santosa; Takashi Ogi; Ferry Iskandar. 2020. "Regeneration of LiNi1/3Co1/3Mn1/3O2 Cathode Active Materials from End-of-Life Lithium-Ion Batteries through Ascorbic Acid Leaching and Oxalic Acid Coprecipitation Processes." ACS Sustainable Chemistry & Engineering 8, no. 43: 1.
Mesoporous Ce0.75Zr0.25O2 solid solution powders were successfully synthesized by a co-precipitation method. A combination of 10 wt% copper oxide, manganese oxide, and nickel oxide was added to the Ce0.75Zr0.25O2 support by impregnation method and calcined in the air with a flow rate of 2 ml s−1 at 400 °C for 4 h. All catalysts were characterized using Hydrogen Temperature Programmed Reduction (H2-TPR), X-ray Diffraction (XRD), and Brunauer-Emmet-Teller (BET) isotherm methods to find the interaction between metals, the crystallinity of the catalyst, surface area and pore volume of the catalyst, respectively. The 3.3% CuO-3.3% MnO2-3.3% NiO/Ce0.75Zr0.25O2 catalyst showed higher catalytic activity for benzene oxidation with benzene conversion of 90% at 250 °C and weight hourly space velocity (72,000 mL g−1 h−1) when compared to one metal oxide only. This finding presents a high activity and low-cost catalysts for removing a very lean concentration of benzene containing in the industrial flue gas at low temperatures.
I.C. Sophiana; A. Topandi; F. Iskandar; H. Devianto; N. Nishiyama; Y.W. Budhi. Catalytic oxidation of benzene at low temperature over novel combination of metal oxide based catalysts: CuO, MnO2, NiO with Ce0.75Zr0.25O2 as support. Materials Today Chemistry 2020, 17, 100305 .
AMA StyleI.C. Sophiana, A. Topandi, F. Iskandar, H. Devianto, N. Nishiyama, Y.W. Budhi. Catalytic oxidation of benzene at low temperature over novel combination of metal oxide based catalysts: CuO, MnO2, NiO with Ce0.75Zr0.25O2 as support. Materials Today Chemistry. 2020; 17 ():100305.
Chicago/Turabian StyleI.C. Sophiana; A. Topandi; F. Iskandar; H. Devianto; N. Nishiyama; Y.W. Budhi. 2020. "Catalytic oxidation of benzene at low temperature over novel combination of metal oxide based catalysts: CuO, MnO2, NiO with Ce0.75Zr0.25O2 as support." Materials Today Chemistry 17, no. : 100305.
The SEM image of (a) cellulose membrane and (b) the bilayer structure of a nylon 6 nanofibrous membrane on a cellulose membrane as water filter media.
Ahmad Fauzi; Dian Ahmad Hapidin; Muhammad Miftahul Munir; Ferry Iskandar; Khairurrijal Khairurrijal. A superhydrophilic bilayer structure of a nylon 6 nanofiber/cellulose membrane and its characterization as potential water filtration media. RSC Advances 2020, 10, 17205 -17216.
AMA StyleAhmad Fauzi, Dian Ahmad Hapidin, Muhammad Miftahul Munir, Ferry Iskandar, Khairurrijal Khairurrijal. A superhydrophilic bilayer structure of a nylon 6 nanofiber/cellulose membrane and its characterization as potential water filtration media. RSC Advances. 2020; 10 (29):17205-17216.
Chicago/Turabian StyleAhmad Fauzi; Dian Ahmad Hapidin; Muhammad Miftahul Munir; Ferry Iskandar; Khairurrijal Khairurrijal. 2020. "A superhydrophilic bilayer structure of a nylon 6 nanofiber/cellulose membrane and its characterization as potential water filtration media." RSC Advances 10, no. 29: 17205-17216.
We present a density functional theory study of atomic and molecular adsorption on a single Pt atom deposited at the edges of graphene. We investigate geometric and electronic structures of atoms (H, C, N, and O) and molecules (O2, CO, OH, NO, H2O, and OOH) on a variety of Pt deposited graphene edges and compare the adsorption states with those on a Pt(111) surface and on a Pt single atom. Furthermore, using the calculated adsorption energy and simple kinetic models, the catalytic activities of a Pt single-atom catalyst for the oxygen reduction reaction and CO oxidation are discussed.
Sasfan Arman Wella; Yuji Hamamoto; Ferry Iskandar; Suprijadi; Yoshitada Morikawa; Ikutaro Hamada. Atomic and molecular adsorption on single platinum atom at the graphene edge: A density functional theory study. The Journal of Chemical Physics 2020, 152, 104707 .
AMA StyleSasfan Arman Wella, Yuji Hamamoto, Ferry Iskandar, Suprijadi, Yoshitada Morikawa, Ikutaro Hamada. Atomic and molecular adsorption on single platinum atom at the graphene edge: A density functional theory study. The Journal of Chemical Physics. 2020; 152 (10):104707.
Chicago/Turabian StyleSasfan Arman Wella; Yuji Hamamoto; Ferry Iskandar; Suprijadi; Yoshitada Morikawa; Ikutaro Hamada. 2020. "Atomic and molecular adsorption on single platinum atom at the graphene edge: A density functional theory study." The Journal of Chemical Physics 152, no. 10: 104707.
An alternative way to fabricate reduced graphene oxide-based transparent conductive films (rGO based TCF) using microwave assisted irradiation is introduced. This modified method offers lower cost, more efficiency and more convenience in thin-film fabrication. A high mode of conventional microwave irradiation was used in this research, with time variation at 30 and 60 min. For comparison, an unirradiated sample was prepared to see the direct effect of microwave radiation on the properties of the samples. The electrical and optical properties of the samples were characterized by sheet resistance measurement and UV–Vis spectrometry. Scanning electron microscopy was used to observe the morphology of the rGO thin film on the substrate. Microwave radiation at 30 min gave the best combination for electrical and optical properties, with the sheet resistance of 21.97 kΩ/sq and 30.37% transmittance, respectively. X-ray photoemission spectroscopy results confirmed the increased of CC bonding and reduced CO and CO bonding in the sample subjected to 30 min of microwave radiation. This study provides a different perspective on the fabrication of rGO based TCF.
Akfiny Hasdi Aimon; Rahmat Hidayat; Dina Rahmawati; Ronny Sutarto; Fitri Aulia Permatasari; Ferry Iskandar. Facile deposition of reduced graphene oxide-based transparent conductive film with microwave assisted method. Thin Solid Films 2019, 692, 137618 .
AMA StyleAkfiny Hasdi Aimon, Rahmat Hidayat, Dina Rahmawati, Ronny Sutarto, Fitri Aulia Permatasari, Ferry Iskandar. Facile deposition of reduced graphene oxide-based transparent conductive film with microwave assisted method. Thin Solid Films. 2019; 692 ():137618.
Chicago/Turabian StyleAkfiny Hasdi Aimon; Rahmat Hidayat; Dina Rahmawati; Ronny Sutarto; Fitri Aulia Permatasari; Ferry Iskandar. 2019. "Facile deposition of reduced graphene oxide-based transparent conductive film with microwave assisted method." Thin Solid Films 692, no. : 137618.
Acrylonitrile butadiene styrene (ABS) waste has been successfully recycled into nanofiber membranes by an electrospinning method for air filter applications.
Akmal Zulfi; Dian Ahmad Hapidin; Muhammad Miftahul Munir; Ferry Iskandar; Khairurrijal Khairurrijal. The synthesis of nanofiber membranes from acrylonitrile butadiene styrene (ABS) waste using electrospinning for use as air filtration media. RSC Advances 2019, 9, 30741 -30751.
AMA StyleAkmal Zulfi, Dian Ahmad Hapidin, Muhammad Miftahul Munir, Ferry Iskandar, Khairurrijal Khairurrijal. The synthesis of nanofiber membranes from acrylonitrile butadiene styrene (ABS) waste using electrospinning for use as air filtration media. RSC Advances. 2019; 9 (53):30741-30751.
Chicago/Turabian StyleAkmal Zulfi; Dian Ahmad Hapidin; Muhammad Miftahul Munir; Ferry Iskandar; Khairurrijal Khairurrijal. 2019. "The synthesis of nanofiber membranes from acrylonitrile butadiene styrene (ABS) waste using electrospinning for use as air filtration media." RSC Advances 9, no. 53: 30741-30751.
This work investigated the electrochemical characteristics of TiOx and its composite with reduced graphene oxide.
Retno Maharsi; Aditya Farhan Arif; Takashi Ogi; Hendri Widiyandari; Ferry Iskandar. Electrochemical properties of TiOx/rGO composite as an electrode for supercapacitors. RSC Advances 2019, 9, 27896 -27903.
AMA StyleRetno Maharsi, Aditya Farhan Arif, Takashi Ogi, Hendri Widiyandari, Ferry Iskandar. Electrochemical properties of TiOx/rGO composite as an electrode for supercapacitors. RSC Advances. 2019; 9 (48):27896-27903.
Chicago/Turabian StyleRetno Maharsi; Aditya Farhan Arif; Takashi Ogi; Hendri Widiyandari; Ferry Iskandar. 2019. "Electrochemical properties of TiOx/rGO composite as an electrode for supercapacitors." RSC Advances 9, no. 48: 27896-27903.
This paper reports on the recycling of expanded polystyrene (EPS) waste to be repurposed as EPS nanofibrous mats for air filtration applications. The EPS nanofibrous mats were prepared via electrospinning technique. The EPS solutions for producing the mats were made by dissolving the EPS waste in dimethylformamide (DMF) and d-limonene solvents. The mixing ratio of DMF and d-limonene solvents were varied to obtain EPS solutions with different surface tension and viscosity. As a result, different fiber morphology (smooth fiber, wrinkled fiber, and beaded fiber) and diameter ranging from 314 nm to 3506 nm were obtained. The synthesized EPS nanofibrous mats were characterized by scanning electron microscope, Fourier-transform infrared spectroscopy, x-ray diffraction spectroscopy, differential scanning calorimetry, mechanical strength, porosity, and water contact angle measurement apparatus. The mechanical strength measurement exhibited that the beaded fiber had the highest tensile strength and the lowest elasticity compared to wrinkled and smooth fiber. The water contact angle measurement showed that the EPS nanofibrous mats were classified as ultra-hydrophobic, which was a good criterion for air filter media. Some filtration parameters of the EPS nanofibrous mats were measured, including particle collecting efficiency, pressured drop, and quality factor. The particle collecting efficiency of each EPS nanofibrous mats was measured using monodisperse polystyrene latex (PSL) particles and PM2.5 from burning incense as the test particles. The EPS nanofibrous mats had a high collecting efficiency (up to 99.99%) and had a low pressure drop (below 70 Pa) for the face velocity of 5.4 cm s-1. The quality factor of the EPS nanofibrous mats reached 0.10 for PSL filtration and 0.16 for PM2.5 filtration. Overall, the EPS nanofibrous mats with controlled morphology were suitable to be used as air filtration media with high mechanical strength, ultra-hydrophobic surface, and high quality factor.
Abdul Rajak; Dian Ahmad Hapidin; Ferry Iskandar; Muhammad Miftahul Munir; Khairurrijal Khairurrijal; Khairurrijal R. Controlled morphology of electrospun nanofibers from waste expanded polystyrene for aerosol filtration. Nanotechnology 2019, 30, 425602 .
AMA StyleAbdul Rajak, Dian Ahmad Hapidin, Ferry Iskandar, Muhammad Miftahul Munir, Khairurrijal Khairurrijal, Khairurrijal R. Controlled morphology of electrospun nanofibers from waste expanded polystyrene for aerosol filtration. Nanotechnology. 2019; 30 (42):425602.
Chicago/Turabian StyleAbdul Rajak; Dian Ahmad Hapidin; Ferry Iskandar; Muhammad Miftahul Munir; Khairurrijal Khairurrijal; Khairurrijal R. 2019. "Controlled morphology of electrospun nanofibers from waste expanded polystyrene for aerosol filtration." Nanotechnology 30, no. 42: 425602.
Nickel-rich cathode material, NCA (85:14:1), is successfully synthesized using two different, simple and economical batch methods, i.e., hydroxide co-precipitation (NCA-CP) and the hydroxides solid state reaction method (NCA-SS), followed by heat treatments. Based on the FTIR spectra, all precursor samples exhibit two functional groups of hydroxide and carbonate. The XRD patterns of NCA-CP and NCA-SS show a hexagonal layered structure (space group: R_3m), with no impurities detected. Based on the SEM images, the micro-sized particles exhibit a sphere-like shape with aggregates. The electrochemical performances of the samples were tested in a 18650-type full-cell battery using artificial graphite as the counter anode at the voltage range of 2.7–4.25 V. All samples have similar characteristics and electrochemical performances that are comparable to the commercial NCA battery, despite going through different synthesis routes. In conclusion, the overall results are considered good and have the potential to be adapted for commercialization.
Cornelius Satria Yudha; Soraya Ulfa Muzayanha; Hendri Widiyandari; Ferry Iskandar; Wahyudi Sutopo; Agus Purwanto. Synthesis of LiNi0.85Co0.14Al0.01O2 Cathode Material and its Performance in an NCA/Graphite Full-Battery. Energies 2019, 12, 1886 .
AMA StyleCornelius Satria Yudha, Soraya Ulfa Muzayanha, Hendri Widiyandari, Ferry Iskandar, Wahyudi Sutopo, Agus Purwanto. Synthesis of LiNi0.85Co0.14Al0.01O2 Cathode Material and its Performance in an NCA/Graphite Full-Battery. Energies. 2019; 12 (10):1886.
Chicago/Turabian StyleCornelius Satria Yudha; Soraya Ulfa Muzayanha; Hendri Widiyandari; Ferry Iskandar; Wahyudi Sutopo; Agus Purwanto. 2019. "Synthesis of LiNi0.85Co0.14Al0.01O2 Cathode Material and its Performance in an NCA/Graphite Full-Battery." Energies 12, no. 10: 1886.
Graphene is a 2D material which has attracted a lot of attention due to its various fascinating properties. The most straightforward and facile synthesis method to produce graphene is chemical exfoliation method, which is conducted by reducing the graphene oxide. In this paper, we investigated the effect of microwave duty cycles on the electrical conductivity properties of rGO. The microwave was set at a different variation of duty cycles and reduction times. The reduction process with microwave-assisted was done under nitrogen conditions. The samples were characterized using Fourier transforms infrared spectrometry (FTIR), Scanning electron microscopy (SEM), and four-point probes. The highest conductivity of 18.10 S/cm was observed from rGO samples prepared by the reduction process using hydrazine as reducing agent and treated by high microwave irradiation mode for 3 min under N2 conditions.
Utiya Hikmah; Erythrina Stavila; Dadang Suhendar; Akfiny Hasdi Aimon; Ferry Iskandar. The Effect of Microwave Duty Cycle on The Electrical Conductivity of Reduced Graphene Oxide (rGO). Journal of Physics: Conference Series 2019, 1204, 012076 .
AMA StyleUtiya Hikmah, Erythrina Stavila, Dadang Suhendar, Akfiny Hasdi Aimon, Ferry Iskandar. The Effect of Microwave Duty Cycle on The Electrical Conductivity of Reduced Graphene Oxide (rGO). Journal of Physics: Conference Series. 2019; 1204 (1):012076.
Chicago/Turabian StyleUtiya Hikmah; Erythrina Stavila; Dadang Suhendar; Akfiny Hasdi Aimon; Ferry Iskandar. 2019. "The Effect of Microwave Duty Cycle on The Electrical Conductivity of Reduced Graphene Oxide (rGO)." Journal of Physics: Conference Series 1204, no. 1: 012076.