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Integration of a Cu2O/ZnO heterojunction and Ag@SiO2 into a photoanode for enhanced solar water oxidation.

ABSTRACT: Photoelectrochemical water splitting (PEC-WS) has attracted considerable attention owing to its low energy consumption and sustainable nature. Constructing semiconductor heterojunctions with controllable band structure can effectively facilitate photogenerated carrier separation. In this study, a FTO/ZnO/Cu2O/Ag@SiO2 photoanode with a Cu2O/ZnO p-n heterojunction and Ag@SiO2 nanoparticles is constructed to investigate its PEC-WS performance. Compared with a bare ZnO photoanode, the photocurrent density of the FTO/ZnO/Cu2O/Ag@SiO2 photoanode (0.77 mA cm-2) at 1.23 VRHE exhibits an increment of 88%, and a cathodic shift of 0.1 V for the on-set potential (0.4 VRHE). Detailed photoelectrochemical analyses reveal that the Cu2O/ZnO p-n heterojunction formed between Cu2O and ZnO can effectively promote photogenerated carrier separation. The surface plasmonic effect of the Ag@SiO2 nanoparticles can further promote the photogenerated carrier transfer efficiency, which synergistically improves the PEC-WS performance.

SUBMITTER: Zeng X 

PROVIDER: S-EPMC10836412 | biostudies-literature | 2024 Jan

REPOSITORIES: biostudies-literature

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Integration of a Cu<sub>2</sub>O/ZnO heterojunction and Ag@SiO<sub>2</sub> into a photoanode for enhanced solar water oxidation.

Zeng Xuyang X   Gao Qianyu Q   Song Peilin P   Zhang Xinru X   Xie Jiaying J   Dong Qingwen Q   Qi Junjie J   Xing Xiu-Shuang XS   Du Jimin J  

RSC advances 20240101 7

Photoelectrochemical water splitting (PEC-WS) has attracted considerable attention owing to its low energy consumption and sustainable nature. Constructing semiconductor heterojunctions with controllable band structure can effectively facilitate photogenerated carrier separation. In this study, a FTO/ZnO/Cu<sub>2</sub>O/Ag@SiO<sub>2</sub> photoanode with a Cu<sub>2</sub>O/ZnO p-n heterojunction and Ag@SiO<sub>2</sub> nanoparticles is constructed to investigate its PEC-WS performance. Compared wi  ...[more]

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