|
| Effects of Electrolyte Composition, Thickness and Surface Modification on Photo-Electrochemical Activity of BiVO4 Films Deposited through Spin-Coating |
| Author Name | Affiliation | E-mail | | SUI Mei-Rong | School of Chemical Engineering and Technology, China University of Mining and Technology, Xuzhou, Jiangsu 221116, China
College of Medical imaging, Xuzhou Medical University, Xuzhou, Jiangsu 221004, China | | | GU Xiu-Quan | School of Materials Science and Engineering, China University of Mining and Technology, Xuzhou, Jiangsu 221116, China | | | SHI Mei-Lin | College of Medical imaging, Xuzhou Medical University, Xuzhou, Jiangsu 221004, China | | | LIU Lin-Lin | College of Medical imaging, Xuzhou Medical University, Xuzhou, Jiangsu 221004, China | | | NI Zhong-Hai | School of Chemical Engineering and Technology, China University of Mining and Technology, Xuzhou, Jiangsu 221116, China | nizhonghai@cumt.edu.cn |
|
| Abstract: 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. |
| Keywords: BiVO4 photoelectrochemical porous films doping modification |
| Hits: 923 |
| Download times: 634 |
| 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. |
| View Full Text View/Add Comment Download reader |
|
|
|
|
|
|
|
|
