Citation: SUI Mei-Rong, GU Xiu-Quan, SHI Mei-Lin, LIU Lin-Lin, NI Zhong-Hai. Effects of Electrolyte Composition, Thickness and Surface Modification on Photo-Electrochemical Activity of BiVO₄ Films Deposited through Spin-Coating[J]. Chinese Journal of Inorganic Chemistry, ;2018, 34(6): 1183-1191. doi: 10.11862/CJIC.2018.143a shu

Effects of Electrolyte Composition, Thickness and Surface Modification on Photo-Electrochemical Activity of BiVO₄ Films Deposited through Spin-Coating

1.
School of Chemical Engineering and Technology, China University of Mining and Technology, Xuzhou, Jiangsu 221116, China
2.
College of Medical imaging, Xuzhou Medical University, Xuzhou, Jiangsu 221004, China
3.
School of Materials Science and Engineering, China University of Mining and Technology, Xuzhou, Jiangsu 221116, China

Corresponding author: NI Zhong-Hai, nizhonghai@cumt.edu.cn
Received Date: 18 January 2018
Revised Date: 10 April 2018

Figures(11)

Porous BiVO₄ thin films have been prepared on the fluorine doped tin oxide (SnO₂:F) coated glass substrates through a facile spin-coating strategy for water splitting application. The film thickness was tuned by varying the deposition cycles and the precursor concentration, respectively. The influences of electrolyte composition, film thickness and surface modification were investigated on the actual photoelectrochemical (PEC) performance of the as-annealed BiVO₄ porous films. The results show that the PEC activity of BiVO₄ can be enhanced effectively by adding a hole scavenger Na₂SO₃ with suitable amount into the electrolyte, or modified the surface with a co-catalyst Co-Pi. These methods can suppress the carrier recombination that occurs at the solid/liquid interface. The highest photocurrent density (4.3 mA·cm^-2 at a bias of 0.6 V (vs SCE)) was achieved in the BiVO₄ samples which were synthesized at the optimal condition and characterized under a visible-light irradiation intensity of 100 mW·cm^-2, using a 0.1 mol·L^-1 Na₂SO₄+0.1 mol·L^-1 Na₂SO₃ electrolyte. Additionally, a facile PEC bio-sensor is constructed by using a BiVO₄ film anode, leading to an acceptable sensitivity for detecting the glutathione (GSH). In a word, it is demonstrated that the PEC performance of BiVO₄ is dependent on both the light harvesting and carrier diffusion process.
- BiVO₄,
- photoelectrochemical,
- porous films,
- doping,
- modification
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通讯作者: 陈斌, bchen63@163.com

1.
沈阳化工大学材料科学与工程学院沈阳 110142

Effects of Electrolyte Composition, Thickness and Surface Modification on Photo-Electrochemical Activity of BiVO4 Films Deposited through Spin-Coating

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通讯作者: 陈斌, bchen63@163.com

Effects of Electrolyte Composition, Thickness and Surface Modification on Photo-Electrochemical Activity of BiVO₄ Films Deposited through Spin-Coating