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Z-Scheme Modulated Charge Transfer on InVO4@ZnIn2S4 for Durable Overall Water Splitting |
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| Authors: | Gancheng Zuo Sisi Ma Zhizhen Yin Wuyang Chen Yuting Wang Qiuyi Ji Qiming Xian Shaogui Yang Huan He |
| Affiliation: | 1. Jiangsu Engineering Lab of Water and Soil Eco-remediation, School of Environment, Nanjing Normal University, Nanjing, 210023 P. R. China State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing, 210023 P. R. China Jiangsu Province Engineering Research Center of Environmental Risk Prevention and Emergency Response Technology, Nanjing, 210023 P. R. China;2. Jiangsu Engineering Lab of Water and Soil Eco-remediation, School of Environment, Nanjing Normal University, Nanjing, 210023 P. R. China Jiangsu Province Engineering Research Center of Environmental Risk Prevention and Emergency Response Technology, Nanjing, 210023 P. R. China;3. Jiangsu Engineering Lab of Water and Soil Eco-remediation, School of Environment, Nanjing Normal University, Nanjing, 210023 P. R. China Key Laboratory of Pollutant Chemistry and Environmental Treatment, Yili Normal University, Yining, 835000 P. R. China;4. State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing, 210023 P. R. China;5. Jiangsu Engineering Lab of Water and Soil Eco-remediation, School of Environment, Nanjing Normal University, Nanjing, 210023 P. R. China |
| Abstract: | The charge transfer within heterojunction is crucial for the efficiency and stability of photocatalyst for overall water splitting (OWS). Herein, InVO4 nanosheets have been employed as a support for the lateral epitaxial growth of ZnIn2S4 nanosheets to produce hierarchical InVO4@ZnIn2S4 (InVZ) heterojunctions. The distinct branching heterostructure facilitates active site exposure and mass transfer, further boosting the participation of ZnIn2S4 and InVO4 for proton reduction and water oxidation, respectively. The unique Z-scheme modulated charge transfer, visualized by simulation and in situ analysis, has been proved to promote the spatial separation of photoexcited charges and strengthen the anti-photocorrosion capability of InVZ. The optimized InVZ heterojunction presents improved OWS (153.3 µmol h−1 g−1 for H2 and 76.9 µmol h−1 g−1 for O2) and competitive H2 production (21090 µmol h−1 g−1). Even after 20 times (100 h) of cycle experiment, it still holds more than 88% OWS activity and a complete structure. |
| Keywords: | anti-photocorrosion capability charge transfer internal interfacial electric field overall water splitting Z-scheme heterojunction |