BIOSENSORS & BIOELECTRONICS
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2025
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IF 10.5
Ting Cai,Wenran Zhang,Francessca Charlton,Yali Sun,Yuxuan Chen,Ying Fu,Qian Zhang,Shenghua Liu
Developing advanced signal amplification strategies is essential for improving performance of state-of-the-art photoelectrochemical (PEC) analysis and integrated organic electrochemical transistor (OECT) devices. This study introduces a novel approach by integrating a BiVO 4 /C 3 N 4 heterojunction photoanode with organic photoelectrochemical transistor (OPECT) devices to achieve efficient signal modulation. The BiVO 4 /C 3 N 4 heterojunction is designed to promote effective charge separation and enhance the photoelectrochemical effect, introducing an efficient dual electrochemical signal amplification strategy. Dopamine (DA), a key neurotransmitter, is used as the target analyte as a proof-of-concept study. It acts as an effective electron donor, directly participating in redox reactions to amplify the channel signal and indirectly modulating the channel response through the BiVO 4 /C 3 N 4 electrode. The signal amplification results in the signal enhancement of three orders of magnitude. The developed bioanalytical method enables sensitive detection of DA with a good linear range from 10 -7 to 10 -4 M. Importantly, this dual amplification mechanism is independent of interactions between biological recognition molecules and analytes, providing a universal dual electrochemical signal amplification OPECT sensing platform. These findings indicate the potential this device has for the real-time monitoring of neurotransmitter levels, important for neurological disease monitoring.
研究领域:
生物医学工程
·
分析化学
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DOI
PubMed
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2024
·
IF 4.9
Ying Cheng,Yubo Zhang,Chen Wang,Tao Yu,Xuefei Lei,Rui Guo,Ye Tian,Junhua You,Hangzhou Zhang,Xiaoxue Wang
Photocatalysis is an ideal method for the removal of tetracycline hydrochloride (THC) in water, but it remains challenging, mainly due to the rapid recombination of electron-hole pairs in the catalyst. In this paper, BiVO 4 is prepared by in-situ piezoelectric assisted method (BVO-U) for the first time and applied to the piezo-photocatalytic degradation of THC. It is found that the two catalysts (BVO prepared by stirring assisted method and BVO-U) have similar structures and chemical states, but they exhibit different piezoelectric properties . It is worth mentioning that the degradation efficiency of BVO-U (90 %) is higher than that of BVO (83 %) under ultrasonic coupled light irradiation . In addition, the mechanism is revealed through density functional theory (DFT) calculations, which suggests that the dipole moment of BVO-U increased, promoting the separation of photo-generated carriers, thereby improving the catalytic activity . These findings highlight the great potential of in-situ piezoelectric-assisted synthesis of BVO in piezo-photocatalytic degradation and provide an idea for designing efficient catalysts in the future.
研究领域:
环境科学
·
材料科学
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DOI
高影响因子
RARE METALS
·
2024
·
IF 9.6
Li Jiang,Fang Yu-Chen,Wang Xiao,Ding Ling-Tong,Wang Zhi-Jun,Yang Xin-Yao,Lancok Jan,Li Wei-Min,Zhong Gao-Kuo,Wang Xin,Xing Zheng,Zhao Shen,Liu Shu-De,Long Xia,Ma Ming
Typical p-n junctions have emerged as a promising strategy for contending with charge carrier recombination in solar conversion. However, the photo-corrosion and unsuitable energy band positions still hinder their practical application for hydrogen production from water in photoelectrochemical systems. Here, an in-situ photo-oxidation method is proposed for achieving self-adapting activation of BiVO 4 -based photoanodes with surface-encapsulated CuGaS 2 particles by the ZnO layer. The self-adapting activation demotes the energy band positions of CuGaS 2 , establishing an S-scheme structure with BiVO 4 , resulting in an efficient p-n junction photoanode. The optimal sample exhibits enhanced photocurrent and an onset potential cathodically shifted by ~ 300 mV compared with BiVO 4 , which is attributed to significantly enhanced charge transport and transfer efficiencies. As expected, it attains the highest photocurrent value of 5.87 mA·cm −2 , aided by a hole scavenger at 1.23 V versus a reversible hydrogen electrode, which significantly surpasses that of BiVO 4 (4.32 mA·cm −2 ).
研究领域:
材料科学
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能源科学
·
催化科学
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DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2022
·
IF 7.968
Qi Wang,Biao Xue,Meng Tan,Ningyi Li,Hao Zhou,Hao Du,Guoxiang Yang,Huaze Zhu,Qiang Li
Heterogeneous photocatalysis have attracted extensive attention in the field of environmental remediation. The low charge separation efficiency and poor light response of single semiconductor can be remarkably improved through forming heterojunction . The construction of ternary heterojunctions can further inhibit the recombination of photogenerated charge carriers by the separated redox active sites. A novel and highly efficient Ag 3 VO 4 -BiVO 4 /C 3 N 4 ternary heterojunction were successfully synthesized and characterized in terms of structure, chemical composition and photocatalytic properties. The photocatalytic activities of as-synthesized photocatalysts were evaluated by the photocatalytic reduction of Cr(VI) in the aqueous solution. The photocatalytic Cr(VI) reduction rate of ternary heterojunction is 19 times higher than that by single BiVO 4 . The lower pH, higher concentration of coexisted organics and stronger light intensity endowed photocatalysts with better photocatalytic performance. More Cr(VI) ions were remained in the solution with higher initial concentration of Cr(VI) under the same light irradiation. The Cr(VI) ions could also be totally removed by the ternary heterojunction even after five cycling tests showing good cycling stability. The internal electric field between Ag 3 VO 4 , BiVO 4 and graphitic carbon nitride (C 3 N 4 ) facilitated the separation of photogenerated electron/hole pairs. The suitable band alignments endow ternary heterojunction with isolated oxidation and reduction reactions due to the separated holes and electrons, meanwhile, suppressing charge carrier recombination. This research provides guidance for the rational design of multi-components heterojunction for photocatalytic environmental remediation.
研究领域:
环境科学
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材料科学
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2022
·
IF 16.744
Boqiang Gao,Yu Pan,Qianqian Chang,Zhonghua Xi,Hu Yang
In this work, the sheet-like BiVO 4 with a higher exposure ratio of {0 1 0} facets was synthesized by the addition of TiCl 3 , and the ratio of (0 4 0)/(0 1 1) on {0 1 0}BiVO 4 was 2.85 times higher than that of normal decahedral BiVO 4 . Accordingly, the {0 1 0}BiVO 4 /Ag/CdS all-solid-state Z-scheme heterojunction was further constructed by photoreduction of Ag and chemical deposition of CdS on the well prepared {0 1 0}BiVO 4 successively. The performance and mechanism of {0 1 0}BiVO 4 /Ag/CdS in synergistic adsorption-photodegradation of fluoroquinolones (FQs) from water were investigated in detail. The adsorption-photodegradation could be divided into three processes: adsorption, surface degradation, and solution degradation, with the rate constants of 0.118, 0.029, and 0.012 min −1 , respectively. Accordingly, the adsorption was a rapid process due to the combined CdS in this composited photocatalyst had a high affinity to FQs to achieve an adsorption equilibrium on the surfaces<30.0 min. Besides, {0 1 0}BiVO 4 /Ag/CdS had a better separation efficiency of photogenerated electron-hole pairs than BiVO 4 /Ag/CdS, because the enriched {0 1 0} facets of {0 1 0}BiVO 4 caused more BiVO 4 /Ag/CdS ternary structure formed, and>90% photodegradation efficiency for five FQs ( C 0 = 0.062 mmol/L) was thus obtained within 60.0 min. The radical trapping and EPR results showed that holes and superoxide radicals were the main active species for FQs photodegradation. In summary, {0 1 0}BiVO4/Ag/CdS achieved an enhanced performance in synergistic adsorption and photodegradation of organic contaminants from water, and a talented photocatalyst was thus provided in water and wastewater treatment.
研究领域:
环境科学
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材料科学
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DOI
高影响因子
MATERIALS CHEMISTRY AND PHYSICS
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2020
·
IF 3.408
Jun Liu,Lei Qiu,Meng-Jie Chang,Bin Yuan,Meng Sun,Si-Meng Fan,Wen-Na Cui,Qian Hui,Fu-Rong Ni,Min-Yu Li,Ya-Qing Li,Zhen-Min Luo
Novel fibrous BiVO 4 /CdS heterostructures were fabricated for photodegradation of Rhodamine B (RhB) dyes. Caterpillar shaped BiVO 4 nanofibers were produced by electrospinning and post calcinations . Controllable quantity of CdS nanoparticles were uniformly decorated on BiVO 4 fiber surface by electrostatic interaction . Both the BiVO 4 nanofibers and CdS nanoparticles present high crystallinity . The integration of CdS can significantly enhance the absorption of visible light and separation efficiency of photo-generated charge in BiVO 4 /CdS composites. As a result, the photocatalytic efficiency and apparent reaction rate constant of the optimized BiVO 4 /CdS-2 display 1.6 and 3 times as high as that of pure BiVO 4 after 120 min irradiation under visible light, respectively. Moreover, the BiVO 4 /CdS-2 nanofibers show good stability for repeated visible light photocatalytic application. The scavengers added photocatalytic experiments indicate the crucial roles of •O 2 − and h + for the degradation process, and a Z-scheme photocatalytic mechanism was proposed for the BiVO 4 /CdS system. Due to the simple and low-cost synthetic method, the fibrous BiVO 4 /CdS catalysts are suitable for practical applications.
研究领域:
材料科学
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环境科学
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DOI
高影响因子
FIBERS AND POLYMERS
·
2021
·Vol. 22
·期 12
·3510-3516
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IF 2.153
Chen Jiayi,Wang Kuang,Qi Zhenming,Wang Chunxia
BiVO 4 was prepared by Bi(NO 3 ) 3 ·5H 2 O and NH 4 VO 3 via a facial method. (3-acrylamide propyl) trimethyl ammonium chloride (ATAC) and allyl glycidyl ether (AGE) were reacted with 3-mercaptopropyl triethoxysilane (KH590) under ultraviolet irradiation, respectively, to prepare hydrophilic and reactive components. Then self-dispersive and reactive BiVO 4 nanoparticles were acquired after mixing hydrophilic and reactive components. Cotton fabric loaded with self-dispersive and reactive BiVO 4 was obtained by dipping-drying-curing method. BiVO 4 before and after modification was characterized by scanning electron microscope (SEM), Fourier transform infrared spectroscopy (FT-IR), zeta potential and particle size. X-ray diffraction (XRD), SEM and energy dispersive spectrum (EDS) were adopted to characterize crystal structure, surface morphology and chemical element components of cotton fabric. Ultraviolet protection and self-cleaning performance were investigated. Results showed that the dispersion stability of modified BiVO 4 was improved, and cotton fabric loaded with modified BiVO 4 possessed commendable ultraviolet protection and self-cleaning activities. The modified BiVO 4 with mole ratio of ATAC and AGE at 3:2 had the optimized dispersion stability, and the cotton fabric loaded with it featured the best ultraviolet protection and self-cleaning properties. The possible mechanism and reactions for the binding of BiVO 4 with cotton fabrics was proposed.
研究领域:
材料科学
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纺织工程
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纳米技术
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产品关联
DOI
高影响因子
ACS Omega
·
2017
·
IF 0
Hengyan Yang,Ping Wang,Ding Wang,Yuankun Zhu,Kunpeng Xie,Xianglong Zhao,Junhe Yang,Xianying Wang
Bismuth vanadate (BiVO4) is a promising candidate as a visible-light-driven photocatalyst in the aspect of practical applications. To investigate the origin of active species from BiVO4 and understand the influence of the variations of the photocatalytic process, comparative studies on zero-dimensional nitrogen-doped graphene quantum dot (NGQD)-decorated BiVO4 have been carried out for methylene blue photodegradation. It was found that the hydroxyl group-rich NGQD surface and the established heterojunction structure between NGQDs and BiVO4 were greatly beneficial for the conversion of the •OH radical. With NGQD decoration, the dominant oxidant species for NGQDs/BiVO4 were confirmed to be •OH and H2O2, rather than holes originating from the valence band of unmodified BiVO4. The synergistic photocatalytic mechanism with respect to the interfacial charge transport and the conversion of active species was proposed. The achievement of the controllable active species significantly altering the activity may be applied for different photocatalytic reactions.
研究领域:
材料科学
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环境科学
·
化学
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产品关联
DOI
PubMed
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2020
·
IF 3.99
Yan Li,Xue Li,Xiao-Tian Wang,Li-Juan Jian,Nihad Ibrahim Mohammed Abdallah,Xiao-Fei Dong,Cheng-Wei Wang
Constructing high efficient nanostructured photocatalysts is meaningful for dyeing wastewater treatment . Herein, a new p-n heterostructured photocatalyst of NiS/BiVO 4 (NiS/BVO) was well designed, synthesized and applied to photodegrade anion organic dye. Coupling p-type NiS nanoparticles on n-type decahedral nanostructured BVO cannot obviously increase the specific surface area , but can effectively increase the light harvesting, enhance the photocurrent response, and promote the separation and transfer of the photo-generated electron-holes. As a result, 0.7 molar ratio of NiS/BVO exhibited the best photocatalytic capability of 95.6 % within 90 min irradiation, possessing the highest degradation rate of 1.7970 h −1 , which is almost 16 and 33 times higher than pure BVO (15.8 %, 0.1134 h −1 ) and NiS (7.9 %, 0.0543 h −1 ). Meanwhile, NiS/BVO has well photocatalytic stability in at least five cycling tests.
研究领域:
环境科学
·
材料科学
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DOI
高影响因子
Nanomaterials
·
2019
·Vol. 9
·期 6
·907
·
IF 4.034
Jing Sun,Chunxiao Wang,Tingting Shen,Hongchen Song,Danqi Li,Rusong Zhao,Xikui Wang
Graphene as a two-dimensional (2D) nanoplatform is beneficial for assembling a 2D heterojunction photocatalytic system to promote electron transfer in semiconductor composites. Here a BiVO4nanosheets/reduced graphene oxide (RGO) based 2D-2D heterojunction photocatalytic system as well as 0D-2D BiVO4nanoparticles/RGO and 1D-2D BiVO4nanotubes/RGO nanocomposites are fabricated by a feasible solvothermal process. During the synthesis; the growth of BiVO4and the intimate interfacial contact between BiVO4and RGO occur simultaneously. Compared to 0D-2D and 1D-2D heterojunctions, the resulting 2D-2D BiVO4nanosheets/RGO composites yield superior chemical coupling; leading to exhibit higher photocatalytic activity toward the degradation of acetaminophen under visible light irradiation. Photoluminescence (PL) and photocurrent experiments revealed that the apparent electron transfer rate in 2D-2D BiVO4nanosheets/RGO composites is faster than that in 0D-2D BiVO4nanoparticles/RGO composites. The experimental findings presented here clearly demonstrate that the 2D-2D heterojunction interface can highlight the optoelectronic coupling between nanomaterials and promote the electron–hole separation. This study will motivate new developments in dimensionality factors on designing the heterojunction photocatalysts and promote their photodegradation photocatalytic application in environmental issues.Keywords:BiVO4;RGO;visible light;two-dimensional interface;photocatalysis
研究领域:
材料科学
·
环境科学
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产品关联
DOI
PubMed
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2022
·Vol. 30
·期 6
·15991-16002
·
IF 5.19
Zhang Xueying,Liu Yonggang,Yu Yonghao,Wang Lifen,Lin Yinjun
Here, we report a simple and efficient strategy for evenly in situ growth of Cu 2 (OH) 3 F nanosheets on BiVO 4 spheres as a novel photo-Fenton-like catalyst using hydrothermal method. The Cu 2 (OH) 3 F/BiVO 4 composite catalysts showed great performance for the organic pollutants degradation under visible light irradiation due to the efficient electron transfer and copper species transformation. The synergetic between Cu 2 (OH) 3 F and BiVO 4 not only promoted the separation of electrons and holes but also enhanced the Cu 2+ reduction, thus produced more strong oxidative radicals under a wide pH value range. The activity of Cu 2 (OH) 3 F/BiVO 4 composite for methylene blue degradation was 6.03 and 5.47 times more than that of pristine Cu 2 (OH) 3 F and BiVO 4 , respectively. The composite catalysts were characterized with various methods and their stability and adaptability were also evaluated. Finally, a possible photo-Fenton-like reaction mechanism was also proposed based on the band structure/position and reaction species.
研究领域:
环境科学
·
材料科学
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产品关联
DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2019
·
IF 5.155
Meiting Song,Yuhang Wu,Guopeng Zheng,Chunfang Du,Yiguo Su
Z -scheme g-C 3 N 4 /Au/BiVO 4 photocatalyst has been prepared successfully by assembling gold nanoparticles on the interface of super-thin porous g-C 3 N 4 and BiVO 4 , which exhibits outstanding photocatalytic performance toward hydrogen evolution and durable stability in the absence of cocatalyst. The highest photocatalytic hydrogen production rate of g-C 3 N 4 /Au/BiVO 4 was about 410.0 μmol g −1 h −1 , which largely beyond that obtained of g-C 3 N 4 /BiVO 4 (23.3 μmol g −1 h −1 ), Au/g-C 3 N 4 (244.6 μmol g −1 h −1 ) and pristine g-C 3 N 4 (2.2 μmol g −1 h −1 ). The optimal apparent quantum efficiency was counted to be 6.8% at λ = 420 nm and 1.1% at λ = 600 nm. Moreover, the photocatalytic property of g-C 3 N 4 /Au/BiVO 4 could remain unchanged almost with 50 h in 5 cycles. The improvement of photocatalytic H 2 yield is attributed to the result of rapid separation of photogenic carriers in space and surface plasmon resonance effect of Au nanoparticles. In combination of photoelectrochemical measurement, active species capture experiment and electron paramagnetic resonance spectra, the underlying mechanism was illuminated. The pathway of charge carrier migration between semiconductor photocatalysts could be changed to Z-system through Au as an electron intermediate, which could not only benefit to maintain outstanding redox capability but also help to accelerate photo-generated carrier separation, and thus improve the photocatalytic activity .
研究领域:
材料科学
·
能源化学
·
光催化
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）