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A Non‐enzymatic Hydrogen Peroxide Photoelectrochemical Sensor Based on a BiVO 4 Electrode
Author(s) -
Liu Min,
Yu YuXiang,
Zhang WeiDe
Publication year - 2017
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/elan.201600366
Subject(s) - nanoporous , photocurrent , tin oxide , electrode , materials science , hydrogen peroxide , annealing (glass) , dielectric spectroscopy , analytical chemistry (journal) , optoelectronics , photoelectrochemistry , inorganic chemistry , doping , chemistry , nanotechnology , electrochemistry , organic chemistry , chromatography , composite material
In this study, a non‐enzymatic hydrogen peroxide photoelectrochemical (PEC) sensor based on nanoporous BiVO 4 film electrode is fabricated by electrodeposit of nanoporous BiOI film on fluorine‐doped tin oxide glass (FTO) and subsequent conversion to BiVO 4 by annealing at elevated temperature. The electrode exhibits excellent visible light photoelectrochemical activity, and H 2 O 2 works as a hole scavenger to react with light‐induced electron holes on the valence band of BiVO 4 . Upon illumination and at applied bias potential of +0.2 V, the photocurrent density is linearly correlated to the concentration of H 2 O 2 . The linear determination range of H 2 O 2 is 9.54–764.76 μM with a corresponding correlation coefficient of 0.9997, a detection limit of 1.59 μM (S/N=3), and sensitivity of 182.6 μA 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 H 2 O 2 and displays a promising prospect for non‐enzyme PEC H 2 O 2 sensor.