Preparation of BiPO4/graphene photoelectrode and its photoelectrocatalyitic performance
- Publisher:
- SCIENCE PRESS
- Publication Type:
- Journal Article
- Citation:
- Chinese Journal of Catalysis, 2020, 41, (2), pp. 302-311
- Issue Date:
- 2020-02-01
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| Filename | Description | Size | |||
|---|---|---|---|---|---|
| 1-s2.0-S1872206719635205-main.pdf | Published version | 1.62 MB |
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In this work, a two-step electrodeposition method was employed to prepare BiPO nanorod/reduced graphene oxide/FTO composite electrodes (BiPO /rGO/FTO). The BiPO /rGO/FTO composite electrode showed the higher photoelectrocatalytic (PEC) activity for the removal of methyl orange than pure BiPO , which was 2.8 times higher than that of BiPO /FTO electrode. The effects of working voltage and BiPO deposition time on the degradation efficiency of methyl orange were investigated. The optimum BiPO deposition time was 45 min and the optimum working voltage was 1.2 V. The trapping experiments showed that hydroxyl radicals (•OH) and superoxide radicals (•O ) were the major reactive species in PEC degradation process. The BiPO /rGO/FTO composite electrode showed the high stability and its methyl orange removal efficiency remained unchanged after four testing cycles. The reasons for the enhanced PEC efficiency of the BiPO /rGO/FTO composite electrode was ascribed to the broad visible-light absorption range, the rapid transmission of photogenerated charges, and the mixed BiPO phase by the introduction of rGO in the composite electrode films. 4 4 4 4 4 4 4 2 4 4 4
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