A hydrogen sulfide photoelectrochemical sensor based on BiVO4/Fe2O3 heterojunction
Shi Wang1, Jialin Ao1, Saiwen Ding1
1School of Pharmacy, Xianning Medical College, Hubei University of Science and Technology, Xianning, 437100, People's Republic of China.
Abstract:
A BiVO4/Fe2O3 heterojunction for non-enzymatic photoelectrochemical (PEC) determination of hydrogen sulfide (H2S) is reported. The BiVO4/Fe2O3 heterojunction promoted the separation of photo-generated carriers, reduced electron-hole recombination, and thus improved electron collection and photocurrent. The proposed BiVO4/Fe2O3/FTO sensor exhibited a linear range of 1-500 μM and a detection limit of 0.51 nM H2S. In addition, high selectivity, good reproducibility, and stability were obtained for H2S sensing. The detection of H2S in water and serum samples demonstrated its feasibility. This work provides a new strategy to detect and understand the bio-function of H2S in the biological environment.
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