This page has only limited features, please log in for full access.
Wastewater treatment plants (WWTPs) are the primary recipients of microplastics (MPs), prior to their discharge into natural waterbodies. The aim of this article is to summarize the generation process of MPs and the efficiency of their removal by treatment technologies currently adopted by WWTPs, as well as the influence of sludge treatment on the fragmentation of MPs. WWTPs mainly remove MPs by means of adhesion, sedimentation, and filtration. The average removal efficiency of MPs is less than 90% and is affected by the choice of wastewater treatment process and the properties of MPs (such as the size, density and morphology). The secretion of biological enzymes by microbes and the metabolites of biofilm may promote the hydrolysis of microbial carrier materials, resulting in the release of endogenous MPs under shear force. Furthermore, during wastewater pumping, disinfection and sludge thermal hydrolysis treatment, MPs may form sub-micron-scale secondary MPs through mechanical, ultraviolet, ozone and thermal degradation processes. Processes such as thermal drying of sludge and lime stabilization have been found to lead to the fragmentation of MPs increase the specific surface area and number of MPs, leading to an increase in the potential ecological threat posed by MPs in sludge. Currently, the level of MP pollution throughout the environment is continually increasing. This review will help improve wastewater and sludge treatment processes, effectively reducing the risk of MPs entering the natural water bodies and soil through WWTPs.
Zhenjia Xu; Xue Bai; Zhengfang Ye. Removal and generation of microplastics in wastewater treatment plants: A review. Journal of Cleaner Production 2021, 291, 125982 .
AMA StyleZhenjia Xu, Xue Bai, Zhengfang Ye. Removal and generation of microplastics in wastewater treatment plants: A review. Journal of Cleaner Production. 2021; 291 ():125982.
Chicago/Turabian StyleZhenjia Xu; Xue Bai; Zhengfang Ye. 2021. "Removal and generation of microplastics in wastewater treatment plants: A review." Journal of Cleaner Production 291, no. : 125982.
Heavy metals are inorganic pollutants which pose a serious threat to human and environmental safety, and their effective removal is becoming an increasingly urgent issue. Metal–organic frameworks (MOFs) are a novel group of crystalline porous materials, which have proven to be promising adsorbents because of their extremely high surface areas, optimizable pore volumes and pore size distributions. This study is a systematic review of the recent research on the removal of several major heavy metal ions by MOFs. Based on the different structures of MOFs, varying adsorption capacity can be achieved, ranging from tens to thousands of milligrams per gram. Many MOFs have shown a high selectivity for their target metal ions. The corresponding mechanisms involved in capturing metal ions are outlined and finally, the challenges and prospects for their practical application are discussed.
Yajie Chen; Xue Bai; Zhengfang Ye. Recent Progress in Heavy Metal Ion Decontamination Based on Metal–Organic Frameworks. Nanomaterials 2020, 10, 1481 .
AMA StyleYajie Chen, Xue Bai, Zhengfang Ye. Recent Progress in Heavy Metal Ion Decontamination Based on Metal–Organic Frameworks. Nanomaterials. 2020; 10 (8):1481.
Chicago/Turabian StyleYajie Chen; Xue Bai; Zhengfang Ye. 2020. "Recent Progress in Heavy Metal Ion Decontamination Based on Metal–Organic Frameworks." Nanomaterials 10, no. 8: 1481.
Laboratory sand column experiments were conducted to model the transport behavior of TiO2 nanoparticle-reduced graphene oxide nanocomposite (TiO2 NP/rGO) and TiO2 nanowire-reduced graphene oxide nanocomposite (TiO2 NW/rGO) using different electrolyte solutions and pH values. The breakthrough curve of TiO2/rGO nanocomposite shows that the mobility is highly sensitive to ionic strength and pH. Experimental results found that the zeta potential of TiO2 NW/rGO is more negative due to more hydroxide ions in solution from the TiO2 NWs. The mobility of TiO2 NW/rGO is slightly greater than that of TiO2 NP/rGO at lower ionic strength (1–50 mM NaCl and 1–5 mM CaCl2), whereas at 10 mM CaCl2, TiO2 NW/rGO had weak transport because of physical straining. The ratio of the hydrodynamic diameter (4214 nm) to sand diameter was as high as 0.83. Mobility increased for both TiO2 NP/rGO and TiO2 NW/rGO with respect to ionic strength because of electrostatic repulsions. When the pH was 9 with a 10 mM NaCl background solution, the stronger energy barrier between the nanocomposite and sand contributed to the enhanced transport behavior. However, with a solution at pH 3–6, the ripening effect controlled the transport of TiO2 NW/rGO. The normalized concentrations rapidly climbed to a maximum (0.05 and 0.14) and then decreased gradually after 2 pore volumes. In general, these behaviors may well predict the fate of carbon-based nanoparticles with tailwater or wastewater flowing into soil environments. Graphical Abstract
Jiajing Cao; Xue Bai; Zhengfang Ye; Wei Chen; Haoyu Ge; Yuanyuan Ding; Zulin Hua. Enhanced Transport of TiO2-Reduced Graphene Oxide Nanocomposites in Saturated Porous Media: the Impact of Loaded TiO2 Shape and Solution Conditions. Water, Air, & Soil Pollution 2020, 231, 1 -11.
AMA StyleJiajing Cao, Xue Bai, Zhengfang Ye, Wei Chen, Haoyu Ge, Yuanyuan Ding, Zulin Hua. Enhanced Transport of TiO2-Reduced Graphene Oxide Nanocomposites in Saturated Porous Media: the Impact of Loaded TiO2 Shape and Solution Conditions. Water, Air, & Soil Pollution. 2020; 231 (3):1-11.
Chicago/Turabian StyleJiajing Cao; Xue Bai; Zhengfang Ye; Wei Chen; Haoyu Ge; Yuanyuan Ding; Zulin Hua. 2020. "Enhanced Transport of TiO2-Reduced Graphene Oxide Nanocomposites in Saturated Porous Media: the Impact of Loaded TiO2 Shape and Solution Conditions." Water, Air, & Soil Pollution 231, no. 3: 1-11.
In the 21st century, the development of sustainable energy and advanced technologies to cope with energy shortages and environmental pollution has become vital. Semiconductor photocatalysis is a promising technology that can directly convert solar energy to chemical energy and is extensively used for its environmentally-friendly properties. In the field of photocatalysis, graphitic carbon nitride (g-C3N4) has obtained increasing interest due to its unique physicochemical properties. Therefore, numerous researchers have attempted to integrate quantum dots (QDs) with g-C3N4 to optimize the photocatalytic activity. In this review, recent progress in combining g-C3N4 with QDs for synthesizing new photocatalysts was introduced. The methods of QDs/g-C3N4-based photocatalysts synthesis are summarized. Recent studies assessing the application of photocatalytic performance and mechanism of modification of g-C3N4 with carbon quantum dots (CQDs), graphene quantum dots (GQDs), and g-C3N4 QDs are herein discussed. Lastly, challenges and future perspectives of QDs modified g-C3N4-based photocatalysts in photocatalytic applications are discussed. We hope that this review will provide a valuable overview and insight for the promotion of applications of QDs modified g-C3N4 based-photocatalysts.
Yanling Chen; Xue Bai. A Review on Quantum Dots Modified g-C3N4-Based Photocatalysts with Improved Photocatalytic Activity. Catalysts 2020, 10, 142 .
AMA StyleYanling Chen, Xue Bai. A Review on Quantum Dots Modified g-C3N4-Based Photocatalysts with Improved Photocatalytic Activity. Catalysts. 2020; 10 (1):142.
Chicago/Turabian StyleYanling Chen; Xue Bai. 2020. "A Review on Quantum Dots Modified g-C3N4-Based Photocatalysts with Improved Photocatalytic Activity." Catalysts 10, no. 1: 142.
Results suggest that molecular interaction occurs between AgNPs and HA functional groups and HA can reduce the toxicity of AgNPs to Lemna minor.
Yuanyuan Ding; Xue Bai; Zhengfang Ye; Dongqing Gong; Jiajing Cao; Zulin Hua. Humic acid regulation of the environmental behavior and phytotoxicity of silver nanoparticles to Lemna minor. Environmental Science: Nano 2019, 6, 3712 -3722.
AMA StyleYuanyuan Ding, Xue Bai, Zhengfang Ye, Dongqing Gong, Jiajing Cao, Zulin Hua. Humic acid regulation of the environmental behavior and phytotoxicity of silver nanoparticles to Lemna minor. Environmental Science: Nano. 2019; 6 (12):3712-3722.
Chicago/Turabian StyleYuanyuan Ding; Xue Bai; Zhengfang Ye; Dongqing Gong; Jiajing Cao; Zulin Hua. 2019. "Humic acid regulation of the environmental behavior and phytotoxicity of silver nanoparticles to Lemna minor." Environmental Science: Nano 6, no. 12: 3712-3722.
A facile strategy of electrophoretic deposition has been employed to fabricate a thin film photoelectrochemical (PEC) sensor of functionalized N–doped graphene quantum dots (F–NGQDs) embedded in BiOBr nanosheets, which were prepared by a two–step hydrothermal method, loaded onto indium–tin–oxide coated glass substrate (F–NGQDs/BiOBr/ITO). Electrophoretic deposition provides a mild and environmentally friendly method for PEC film formation. Multiple techniques were applied to investigate the electronic, optical properties and structure of F–NGQDs/BiOBr thin films photoelectrodes. It was found that F–NGQDs/BiOBr thin films with NGQDs/BiOBr heterojunction possess an enhanced charge transfer and absorption wavelengths under visible light, particularly when compared to pristine F–BiOBr films, thus producing an increase in the observed photocurrent. Sensing performance measurements showed the F–NGQDs/BiOBr/ITO photoelectrode has a higher photoelectric response current to paracetamol, it was used to detect trace paracetamol under visible light irradiation. The sensor exhibited a wide linear range, low detection limit and good sensitivity, given the photoactivity of NGQDs/BiOBr heterojunction. The developed PEC sensor displayed an acute response to paracetamol in a linear range of 0.01 μM to 20.0 μM with a detection limit of 3.33 nM, under optimal conditions. Here we present evidence that F–NGQDs/BiOBr/ITO photoelectrode is a promising candidate for PEC analysis.
Kai Gao; Xue Bai; Yi Zhang; Yetong Ji. N–doped graphene quantum dots embedded in BiOBr nanosheets as hybrid thin film electrode for quantitative photoelectrochemical detection paracetamol. Electrochimica Acta 2019, 318, 422 -429.
AMA StyleKai Gao, Xue Bai, Yi Zhang, Yetong Ji. N–doped graphene quantum dots embedded in BiOBr nanosheets as hybrid thin film electrode for quantitative photoelectrochemical detection paracetamol. Electrochimica Acta. 2019; 318 ():422-429.
Chicago/Turabian StyleKai Gao; Xue Bai; Yi Zhang; Yetong Ji. 2019. "N–doped graphene quantum dots embedded in BiOBr nanosheets as hybrid thin film electrode for quantitative photoelectrochemical detection paracetamol." Electrochimica Acta 318, no. : 422-429.
This work investigated the interaction of Fe3O4 nanoparticles (NPs) with a floating water plant (Eichhornia crassipes). The effects of Fe3O4 NPs on E. crassipes physiology and root morphology as well as the migration and transformation of Fe3O4 NPs in plant were studied emphatically. Fe3O4 NPs (200 mg/L) showed significant growth inhibition on E. crassipes roots and leaves after a 21-day exposure, while dissolved Fe3+ ions and Fe3O4 bulk particles had no obvious effect on E. crassipes growth. Scanning electron microscopy showed that the roots of E. crassipes were significantly damaged, the root tips became thin and the root epidermis began to peel off after Fe3O4 NPs exposure. In addition, there was disordered cell arrangement and a destroyed elongation zone of the root tips. The physiology of E. crassipes was also affected. In particular, after exposure to Fe3O4 NPs (200 mg/L), a distinct decrease in chlorophyll content and catalase activity and an increase of malondialdehyde (MDA) content could be seen. Transmission electron microscopy and energy dispersive spectroscopy revealed that Fe3O4 NPs were present in the root epidermis, intercellular space and protoplasts, as well as in the leaf cytoplasm and chloroplasts. Vulcanization in the leaves was also found through diffraction analysis, which may be due to the small number of absorbed nanoparticles, some of which still existed in the original form in the leaves while others were reduced to FeS through interactions with plant components during translocation. These findings are helpful for better understanding the fate of NPs in aquatic plants. Moreover, it is important to evaluate the water environment safety of NPs.
Yuanyuan Ding; Xue Bai; Zhengfang Ye; Lingyu Ma; Lu Liang. Toxicological responses of Fe3O4 nanoparticles on Eichhornia crassipes and associated plant transportation. Science of The Total Environment 2019, 671, 558 -567.
AMA StyleYuanyuan Ding, Xue Bai, Zhengfang Ye, Lingyu Ma, Lu Liang. Toxicological responses of Fe3O4 nanoparticles on Eichhornia crassipes and associated plant transportation. Science of The Total Environment. 2019; 671 ():558-567.
Chicago/Turabian StyleYuanyuan Ding; Xue Bai; Zhengfang Ye; Lingyu Ma; Lu Liang. 2019. "Toxicological responses of Fe3O4 nanoparticles on Eichhornia crassipes and associated plant transportation." Science of The Total Environment 671, no. : 558-567.
Three-dimensional (3D) metal inorganics have gained tremendous interests for a series of applications. Here, we prepared TiO2 microspheres, urchin-like TiO2, and flower-like TiO2 by hydrothermal method. The morphologies of the three 3D TiO2 nanostructures were characterized by scanning electron microscopy and X-ray diffraction analyses. The electrochemical behaviors of the 3D TiO2 nanostructures were investigated by electrochemical impedance spectroscopy and cyclic voltammetry studies. Results showed that 3D TiO2-modified electrodes exhibited improved electrochemical performance compared with bare electrode. The three 3D nanostructures were then used with a modified glassy carbon electrode to detect dopamine (DA). According to the experimental results, the flower-like TiO2/GCE demonstrated excellent electrochemical performance than the two other electrodes. The enhanced electrochemical performance of the 3D flower-like TiO2/GCE is mainly affected by the structure of anatase crystal, which is the most important factor for the enhanced electrochemical performances toward DA detection. The flower-like TiO2/GCE, urchin-like TiO2/GCE, and TiO2 microspheres/GCE possessed linear ranges of 0.02–160, 1–180, and 1–160 μM, with limit of detection values of 0.007, 0.31, and 0.33 μM, respectively.
Xue Bai; Kai Gao; Xin Huang; Caidie Qin; Yi Zhang; Xuan Han. Electrochemical Sensing Characteristics of 3D TiO2 Nanostructures with Different Crystal Structures and Morphologies. Journal of The Electrochemical Society 2018, 165, D663 -D669.
AMA StyleXue Bai, Kai Gao, Xin Huang, Caidie Qin, Yi Zhang, Xuan Han. Electrochemical Sensing Characteristics of 3D TiO2 Nanostructures with Different Crystal Structures and Morphologies. Journal of The Electrochemical Society. 2018; 165 (14):D663-D669.
Chicago/Turabian StyleXue Bai; Kai Gao; Xin Huang; Caidie Qin; Yi Zhang; Xuan Han. 2018. "Electrochemical Sensing Characteristics of 3D TiO2 Nanostructures with Different Crystal Structures and Morphologies." Journal of The Electrochemical Society 165, no. 14: D663-D669.
Via surface aldolisation or semi-aldolisation, the surface of poly(vinyl alcohol) (PVA) microspheres was uniformly doped with sliver nanoparticles (AgNPs). Scanning electron microscope (SEM) revealed the spherical shape of the [email protected] microspheres. Fourier transform infrared spectra and X-ray photoelectron spectra (XPS) provided information on the surface interactions between AgNPs and PVA microspheres. The [email protected] microspheres offered simple and rapid qualitative detection of Hg2+ ions and pH values through a colour change in aqueous solution. The [email protected] microspheres also showed off–on behaviour.
Bei Yang; Xue Bai; Lihong Xue; Lizhang Yang. AgNPs uniformly doped onto PVA microspheres for optical recognition application. Micro & Nano Letters 2018, 13, 1236 -1239.
AMA StyleBei Yang, Xue Bai, Lihong Xue, Lizhang Yang. AgNPs uniformly doped onto PVA microspheres for optical recognition application. Micro & Nano Letters. 2018; 13 (9):1236-1239.
Chicago/Turabian StyleBei Yang; Xue Bai; Lihong Xue; Lizhang Yang. 2018. "AgNPs uniformly doped onto PVA microspheres for optical recognition application." Micro & Nano Letters 13, no. 9: 1236-1239.
A photoelectrochemical wire microelectrode was constructed based on the use of a TiO2 nanotube array with electrochemically deposited CdSe semiconductor. A strongly amplified photocurrent is generated on the sensor surface. The microsensor has a response in the 0.05–20 μM dopamine (DA) concentration range and a 16.7 μM detection limit at a signal-to-noise ratio of 3. Sensitivity, recovery and reproducibility of the sensor were validated by detecting DA in spiked human urine, and satisfactory results were obtained.
Caidie Qin; Xue Bai; Yue Zhang; Kai Gao. Photoelectrochemical CdSe/TiO2 nanotube array microsensor for high-resolution in-situ detection of dopamine. Mikrochimica Acta 2018, 185, 278 .
AMA StyleCaidie Qin, Xue Bai, Yue Zhang, Kai Gao. Photoelectrochemical CdSe/TiO2 nanotube array microsensor for high-resolution in-situ detection of dopamine. Mikrochimica Acta. 2018; 185 (5):278.
Chicago/Turabian StyleCaidie Qin; Xue Bai; Yue Zhang; Kai Gao. 2018. "Photoelectrochemical CdSe/TiO2 nanotube array microsensor for high-resolution in-situ detection of dopamine." Mikrochimica Acta 185, no. 5: 278.
An electrochemical microsensor for chloramphenicol (CAP) was fabricated by introducing magnetic Fe3O4 nanoparticles (NPs) onto the surface of activated carbon fibers. This microsensor exhibited increased electrochemical response toward CAP because of the synergetic effect of the Fe3O4 NPs and the carbon fibers. Cyclic voltammograms were acquired and displayed three stable and irreversible redox peaks in pH 7.0 solution. Under optimized conditions, the cathodic current peaks at −0.67 V (vs. Ag/AgCl). The calibration plot is linear in the 40 pM to 1 μM CAP concentration range, with a 17 pM detection limit (at a signal-to-noise ratio of 3). The sensor was applied to the determination of CAP in spiked sediment samples. In our perception, this electrocatalytic platform provided a useful tool for fast, portable, and sensitive analysis of chloramphenicol.
Xue Bai; Caidie Qin; Xin Huang. Voltammetric determination of chloramphenicol using a carbon fiber microelectrode modified with Fe3O4 nanoparticles. Microchimica Acta 2016, 183, 2973 -2981.
AMA StyleXue Bai, Caidie Qin, Xin Huang. Voltammetric determination of chloramphenicol using a carbon fiber microelectrode modified with Fe3O4 nanoparticles. Microchimica Acta. 2016; 183 (11):2973-2981.
Chicago/Turabian StyleXue Bai; Caidie Qin; Xin Huang. 2016. "Voltammetric determination of chloramphenicol using a carbon fiber microelectrode modified with Fe3O4 nanoparticles." Microchimica Acta 183, no. 11: 2973-2981.
This study investigates the distribution behavior of superparamagnetic multiwalled carbon nanotubes (SPM-MWCNTs) in an aqueous system containing Lake Tai sediment. Specifically, the effects of dissolved organic matter (DOM) and sediment on SPM-MWCNTs under various conditions and the interaction forms between them were evaluated through a modified mathematical model and characterization. The results showed that DOM can stabilize SPM-MWCNTs by providing sterically and electrostatically stable surfaces, even under high sodium concentrations. The fitting accuracy of the Freundlich adsorption isotherm is higher than that of the Langmuir adsorption isotherm. Therefore, the adsorption of SPM-MWCNT on the sediment should proceed through a multiple, complex and heterogeneous adsorption mechanism. Characterization analyses indicated that DOM may serve as a bridge for the inorganic adsorption between SPM-MWCNTs and sediment. This study is the first to investigate the distribution behavior of magnetite coated carbon nanotubes (CNTs), which simplified the separation and quantification considerably. The findings of this study will serve as a valuable reference for future studies of magnetic CNTs.
Xue Bai; Yuqi Liu; Lu Yu; Zulin Hua. Distribution behavior of superparamagnetic carbon nanotubes in an aqueous system. Scientific Reports 2016, 6, 32845 .
AMA StyleXue Bai, Yuqi Liu, Lu Yu, Zulin Hua. Distribution behavior of superparamagnetic carbon nanotubes in an aqueous system. Scientific Reports. 2016; 6 (1):32845.
Chicago/Turabian StyleXue Bai; Yuqi Liu; Lu Yu; Zulin Hua. 2016. "Distribution behavior of superparamagnetic carbon nanotubes in an aqueous system." Scientific Reports 6, no. 1: 32845.
A novel colorimetric sensor was proposed, and the sensor can be used to monitor Hg2+ and Cu2+ ions.
Xue Bai; Yulong Li; Zhengfang Ye. A colorimetric sensor based on thiourea–polyvinyl alcohol microspheres for the selective recognition of Hg2+ and Cu2+. New Journal of Chemistry 2016, 40, 8815 -8822.
AMA StyleXue Bai, Yulong Li, Zhengfang Ye. A colorimetric sensor based on thiourea–polyvinyl alcohol microspheres for the selective recognition of Hg2+ and Cu2+. New Journal of Chemistry. 2016; 40 (10):8815-8822.
Chicago/Turabian StyleXue Bai; Yulong Li; Zhengfang Ye. 2016. "A colorimetric sensor based on thiourea–polyvinyl alcohol microspheres for the selective recognition of Hg2+ and Cu2+." New Journal of Chemistry 40, no. 10: 8815-8822.
A new method for bisphenol A (BPA) degradation in aqueous solution was developed. The characteristics of BPA degradation in a heterogeneous ultraviolet (UV)/Fenton reaction catalyzed by FeCo2O4/TiO2/graphite oxide (GO) were studied. The properties of the synthesized catalysts were characterized using scanning electron microscopy, X-ray diffraction, and vibrating sample magnetometry. FeCo2O4 and TiO2 were grown as spherical shape, rough surface, and relatively uniform on the surface of GO (FeCo2O4/TiO2/GO). Batch tests were conducted to evaluate the effects of the initial pH, FeCo2O4/TiO2/GO dosage, and H2O2 concentration on BPA degradation. In a system with 0.5 g L-1 of FeCo2O4/TiO2/GO and 10 mmol L-1 of H2O2, approximately 90 % of BPA (20 mg L-1) was degraded within 240 min of UV irradiation at pH 6.0. The reused FeCo2O4/TiO2/GO catalyst retained its activity after three cycles, which indicates that it is stable and reusable. The heterogeneous UV/Fenton reaction catalyzed by FeCo2O4/TiO2/GO is a promising advanced oxidation technology for treating wastewater that contains BPA.
Xue Bai; Lingling Lyu; Wenqiang Ma; Zhengfang Ye. Heterogeneous UV/Fenton degradation of bisphenol A catalyzed by synergistic effects of FeCo2O4/TiO2/GO. Environmental Science and Pollution Research 2016, 23, 22734 -22743.
AMA StyleXue Bai, Lingling Lyu, Wenqiang Ma, Zhengfang Ye. Heterogeneous UV/Fenton degradation of bisphenol A catalyzed by synergistic effects of FeCo2O4/TiO2/GO. Environmental Science and Pollution Research. 2016; 23 (22):22734-22743.
Chicago/Turabian StyleXue Bai; Lingling Lyu; Wenqiang Ma; Zhengfang Ye. 2016. "Heterogeneous UV/Fenton degradation of bisphenol A catalyzed by synergistic effects of FeCo2O4/TiO2/GO." Environmental Science and Pollution Research 23, no. 22: 22734-22743.
Palladium-loaded (Pd-loaded) anatase TiO2 with dominant {001} facets used as photocatalysts was prepared by a two-step process. Three dimensional flower-like structures of anatase TiO2 with exposed {001} facets were synthesized by solvothermal method, and then Pd nanoparticles were photodeposited onto the {101} surface of TiO2 by UV reduction. The resulting Pd/TiO2 was characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy, X-ray photoelectron spectroscopy, and UV-vis diffuse reflectance spectra. Characterization results indicated that the flower-like structures of anatase TiO2 were assembled by two dimensional nanosheets with a thickness of approximately 10nm and a length of approximately 1.0μm. The Pd/TiO2 nanocomposites with improved visible-light-harvesting capability, high charge-hole mobility, and low electron-hole recombination exhibited improved photocatalytic performance in degrading bisphenol A. This study provided new insights into the fabrication and practical application of high-performance photocatalysts in degrading organic pollutants.
Xue Bai; Lingling Lv; Xiaoyuan Zhang; Zulin Hua. Synthesis and photocatalytic properties of Palladium-loaded three dimensional flower-like anatase TiO2 with dominant {0 0 1} facets. Journal of Colloid and Interface Science 2016, 467, 1 -9.
AMA StyleXue Bai, Lingling Lv, Xiaoyuan Zhang, Zulin Hua. Synthesis and photocatalytic properties of Palladium-loaded three dimensional flower-like anatase TiO2 with dominant {0 0 1} facets. Journal of Colloid and Interface Science. 2016; 467 ():1-9.
Chicago/Turabian StyleXue Bai; Lingling Lv; Xiaoyuan Zhang; Zulin Hua. 2016. "Synthesis and photocatalytic properties of Palladium-loaded three dimensional flower-like anatase TiO2 with dominant {0 0 1} facets." Journal of Colloid and Interface Science 467, no. : 1-9.
A novel electrochemical biosensing platform is proposed. New tyrosinase-based biosensor can be used to detect phenols.
Zulin Hua; Qin Qin; Xue Bai; Xin Huang; Qi Zhang. An electrochemical biosensing platform based on 1-formylpyrene functionalized reduced graphene oxide for sensitive determination of phenol. RSC Advances 2016, 6, 25427 -25434.
AMA StyleZulin Hua, Qin Qin, Xue Bai, Xin Huang, Qi Zhang. An electrochemical biosensing platform based on 1-formylpyrene functionalized reduced graphene oxide for sensitive determination of phenol. RSC Advances. 2016; 6 (30):25427-25434.
Chicago/Turabian StyleZulin Hua; Qin Qin; Xue Bai; Xin Huang; Qi Zhang. 2016. "An electrochemical biosensing platform based on 1-formylpyrene functionalized reduced graphene oxide for sensitive determination of phenol." RSC Advances 6, no. 30: 25427-25434.
The aggregation kinetics of TiO2-graphene nanocomposites in aqueous solution affected by solution pH, salt types (NaCl, CaCl2) and concentrations of electrolytes, and stability induced by UV irradiation was investigated in this study. The zeta potentials and hydrodynamic diameter of the nanoparticles were used as bases to assess the aggregation behavior, and stability of nanocomposites exposed to UV irradiation was expressed in terms of supernatant concentration. The aggregation of TiO2-graphene nanoparticles in aqueous media followed the colloidal theory. TiO2-graphene nanoparticles were significantly aggregated in the presence of a diavalent cation compared with monovalent cation because the former was more capable of effective charge screening and neutralization. The calculated Hamaker constant of the TiO2-graphene nanocomposites in aqueous solution prepared in the lab was 2.31×10(-20)J. The stability of this composite nanoparticles was between those of pure TiO2 and graphene. A known intensity of UV irradiation was beneficial in the formation of TiO2-graphene nanoparticle aggregates. However, prolonged UV irradiation may stabilize the nanoparticles. These results provided critical information about the colloidal properties of the new TiO2-graphene nanocomposites and were useful in predicting the fate and transport of TiO2-graphene nanocomposites in natural water environments.
Zulin Hua; Jianan Zhang; Xue Bai; Zhengfang Ye; Zhiqiang Tang; Lu Liang; Yuqi Liu. Aggregation of TiO 2 –graphene nanocomposites in aqueous environment: Influence of environmental factors and UV irradiation. Science of The Total Environment 2016, 539, 196 -205.
AMA StyleZulin Hua, Jianan Zhang, Xue Bai, Zhengfang Ye, Zhiqiang Tang, Lu Liang, Yuqi Liu. Aggregation of TiO 2 –graphene nanocomposites in aqueous environment: Influence of environmental factors and UV irradiation. Science of The Total Environment. 2016; 539 ():196-205.
Chicago/Turabian StyleZulin Hua; Jianan Zhang; Xue Bai; Zhengfang Ye; Zhiqiang Tang; Lu Liang; Yuqi Liu. 2016. "Aggregation of TiO 2 –graphene nanocomposites in aqueous environment: Influence of environmental factors and UV irradiation." Science of The Total Environment 539, no. : 196-205.
Xue Bai; Haixin Gu; Yulong Li. Coimmobilized Microalgae and Nitrifying Bacteria for Ammonium Removal. International Journal of Environmental Science and Development 2016, 7, 406 -409.
AMA StyleXue Bai, Haixin Gu, Yulong Li. Coimmobilized Microalgae and Nitrifying Bacteria for Ammonium Removal. International Journal of Environmental Science and Development. 2016; 7 (6):406-409.
Chicago/Turabian StyleXue Bai; Haixin Gu; Yulong Li. 2016. "Coimmobilized Microalgae and Nitrifying Bacteria for Ammonium Removal." International Journal of Environmental Science and Development 7, no. 6: 406-409.
We demonstrate a highly efficient electrocatalytic activity of TiO2 nanosheets with reactive (001) facets grown on a carbon needle microelectrode (TiO2-CNE). This microelectrode is prepared by a simple hydrothermal process. Scanning electron microscopy, high-resolution transmission electron microscopy, and electrochemical impedance spectroscopy were used to characterize as-prepared TiO2-CNE. These methods confirm that the surface area-to-volume ratio and electron transfer rate of TiO2-CNE are considerably greater than those of the bare electrode. In addition, the amperometric response for acetaminophen (AP) oxidation is remarkably facilitated by 13.9 times at the TiO2-CNE by the enlarged surface area-to-volume ratio, as well as the exposure of high-energy (001) facets. Furthermore, the constructed electrochemical sensor displays excellent analytical performance for AP detection over a range of 0.002-100.0 μM, with a detection limit of 0.83 nM (S/N=3). The electrode was applied for the in vitro determination of AP in fish blood 30 min after injection in the abdominal cavity. Consequently, the present approach shows feasibility and great potential in constructing highly sensitive and low-consumption miniaturized electrochemical sensors in the field of biological applications.
Xue Bai; Xin Huang; Qi Zhang; Zulin Hua; Caidie Qin; Qin Qin. A carbon needle microelectrode decorated with TiO 2 nanosheets dominated by reactive facets as a highly electrocatalytic sensing element. Talanta 2015, 143, 184 -190.
AMA StyleXue Bai, Xin Huang, Qi Zhang, Zulin Hua, Caidie Qin, Qin Qin. A carbon needle microelectrode decorated with TiO 2 nanosheets dominated by reactive facets as a highly electrocatalytic sensing element. Talanta. 2015; 143 ():184-190.
Chicago/Turabian StyleXue Bai; Xin Huang; Qi Zhang; Zulin Hua; Caidie Qin; Qin Qin. 2015. "A carbon needle microelectrode decorated with TiO 2 nanosheets dominated by reactive facets as a highly electrocatalytic sensing element." Talanta 143, no. : 184-190.
A series of experiments were performed to simulate the environmental behavior and fate of graphene oxide nanoparticles (GONPs) involved in the surface environment relating to divalent cations, natural organic matter (NOM), and hydraulics. The electrokinetic properties and hydrodynamic diameters of GONPs was systematically determined to characterize GONPs stability and the results indicated Ca(2+) (Mg(2+)) significantly destabilized GONPs with high aggregate strength factors (SF) and fractal dimension (FD), whereas NOM decreased aggregate SF with lower FD and improved GONPs stability primarily because of increasing steric repulsion and electrostatic repulsion. Furthermore, the GONPs resuspension from the sand bed into overlying water with shear flow confirmed that the release would be restricted by Ca(2+) (Mg(2+)), however, enhanced by NOM. The interaction energy based on Derjaguin-Landau-Verwey-Overbeek theory verifies the aggregation and resuspension well. Overall, these experiments provide an innovative look and more details to study the behavior and fate of GONPs.
Zulin Hua; Zhiqiang Tang; Xue Bai; Jianan Zhang; Lu Yu; Haomiao Cheng. Aggregation and resuspension of graphene oxide in simulated natural surface aquatic environments. Environmental Pollution 2015, 205, 161 -169.
AMA StyleZulin Hua, Zhiqiang Tang, Xue Bai, Jianan Zhang, Lu Yu, Haomiao Cheng. Aggregation and resuspension of graphene oxide in simulated natural surface aquatic environments. Environmental Pollution. 2015; 205 ():161-169.
Chicago/Turabian StyleZulin Hua; Zhiqiang Tang; Xue Bai; Jianan Zhang; Lu Yu; Haomiao Cheng. 2015. "Aggregation and resuspension of graphene oxide in simulated natural surface aquatic environments." Environmental Pollution 205, no. : 161-169.