Z-Scheme Modulated Charge Transfer on InVO4 @ZnIn2 S4 for Durable Overall Water Splitting

Gancheng Zuo; Sisi Ma; Zhizhen Yin; Wuyang Chen; Yuting Wang; Qiuyi Ji; Qiming Xian; Shaogui Yang; Huan He

doi:10.1002/smll.202207031

Z-Scheme Modulated Charge Transfer on InVO₄ @ZnIn₂ S₄ for Durable Overall Water Splitting

Small. 2023 May;19(19):e2207031. doi: 10.1002/smll.202207031. Epub 2023 Feb 15.

Authors

Gancheng Zuo^{1

2

3}, Sisi Ma^{1

3}, Zhizhen Yin^{1

4}, Wuyang Chen^{1

3}, Yuting Wang², Qiuyi Ji^{1

3}, Qiming Xian², Shaogui Yang¹, Huan He^{1

3}

Affiliations

¹ Jiangsu Engineering Lab of Water and Soil Eco-remediation, School of Environment, Nanjing Normal University, Nanjing, 210023, P. R. China.
² State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing, 210023, P. R. China.
³ Jiangsu Province Engineering Research Center of Environmental Risk Prevention and Emergency Response Technology, Nanjing, 210023, P. R. China.
⁴ Key Laboratory of Pollutant Chemistry and Environmental Treatment, Yili Normal University, Yining, 835000, P. R. China.

PMID: 36793252
DOI: 10.1002/smll.202207031

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 ZnIn₂ S₄ nanosheets to produce hierarchical InVO₄ @ZnIn₂ S₄ (InVZ) heterojunctions. The distinct branching heterostructure facilitates active site exposure and mass transfer, further boosting the participation of ZnIn₂ S₄ 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: Z-scheme heterojunction; anti-photocorrosion capability; charge transfer; internal interfacial electric field; overall water splitting.

Abstract

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