A Non-enzymatic Hydrogen Peroxide Photoelectrochemical Sensor Based on a BiVO4 Electrode

被引:34
|
作者
Liu, Min [1 ]
Yu, Yu-Xiang [1 ]
Zhang, Wei-De [1 ]
机构
[1] South China Univ Technol, Sch Chem & Chem Engn, 381 Wushan Rd, Guangzhou 510640, Guangdong, Peoples R China
基金
中国国家自然科学基金;
关键词
H2O2; BiVO4; Photoelectrochemistry; Sensor; VISIBLE-LIGHT IRRADIATION; SOLAR WATER OXIDATION; QUANTUM DOTS; PHOTOCATALYTIC DEGRADATION; ELECTROCHEMICAL SYNTHESIS; FACILE SYNTHESIS; DOPED BIVO4; NANOPARTICLES; NANOTUBES; GLUCOSE;
D O I
10.1002/elan.201600366
中图分类号
O65 [分析化学];
学科分类号
070302 ; 081704 ;
摘要
In this study, a non-enzymatic hydrogen peroxide photoelectrochemical (PEC) sensor based on nanoporous BiVO4 film electrode is fabricated by electrodeposit of nanoporous BiOI film on fluorine-doped tin oxide glass (FTO) and subsequent conversion to BiVO4 by annealing at elevated temperature. The electrode exhibits excellent visible light photoelectrochemical activity, and H2O2 works as a hole scavenger to react with light-induced electron holes on the valence band of BiVO4. Upon illumination and at applied bias potential of + 0.2 V, the photocurrent density is linearly correlated to the concentration of H2O2. The linear determination range of H2O2 is 9.54-764.76 mM with a corresponding correlation coefficient of 0.9997, a detection limit of 1.59 mM (S/N= 3), and sensitivity of 182.6 mu A mM(-1)cm(-2). The optimum bias potential, most suitable film thickness, anti-interference performance, and impedance are also explored. The sensor shows good response towards H2O2 and displays a promising prospect for non-enzyme PEC H2O2 sensor.
引用
收藏
页码:305 / 311
页数:7
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