期刊
SENSORS AND ACTUATORS B-CHEMICAL
卷 291, 期 -, 页码 34-41出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2019.04.057
关键词
Non-enzymatic; Photoelectrochemical sensor; Visible light; Bismuth vanadate; Glucose
资金
- National Natural Science Foundation of China [51672018, 51472016, 11874003]
- Beijing Natural Science Foundation [Z180007]
- Fundamental Research Fund for Centre University
- Australian Research Council (ARC) [DP140102581, DP170101467]
A non-enzymatic photoelectrochemical (PEC) glucose sensor based on nanoporous bismuth vanadate (BiVO4) electrode is fabricated on fluorine doped fin oxide by electrochemical deposition. The photogenerated holes of BiVO4 show a strong oxidizing ability, with adsorption of glucose on the surface of BiVO4 agreeing well with the classical Langmuir adsorption model. Under visible light irradiation, the glucose molecules adsorbed on the BiVO4 electrode surface can be oxidized by the photogenerated holes, which results in increased photocurrent. The fabricated BiVO4 non-enzymatic photoelectrochemical sensor shows outstanding catalytic activity, favourable selectivity, good reproducibility, and long-term stability for glucose detection under optimized conditions. The linear range was 0-5 mM (correlation coefficient, R = 0.997) with a detection limit of 0.13 mu mol L-1 (signal-to-noise = 3). In addition, the proposed PEC sensor was successfully applied to detect glucose in human serum samples. Our work provides a new strategy for the non-enzymatic detection of glucose.
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