Citation: Feng CHEN, Cheng-Hua ZHANG, Pei-Yue JIN, Cai-Xian ZHAO. Preparation of Z-Scheme α-Fe₂O₃/g-C₃N₄ Heterojunction Based on In-Situ Photodeposition and Photocatalytic Activity for Hydrogen Production under Visible Light[J]. Chinese Journal of Inorganic Chemistry, ;2022, 38(3): 469-478. doi: 10.11862/CJIC.2022.045 shu

Preparation of Z-Scheme α-Fe₂O₃/g-C₃N₄ Heterojunction Based on In-Situ Photodeposition and Photocatalytic Activity for Hydrogen Production under Visible Light

Feng CHEN ^{1, 2,,} ,
Cheng-Hua ZHANG ² ,
Pei-Yue JIN ² ,
Cai-Xian ZHAO ^2,,

1.
Chemical Engineering College, Guangdong University of Petrochemical Technology, Maoming, Guangdong 525000, China
2.
Chemical Engineering College, Xiangtan University, Xiangtan, Hunan 411105, China

Corresponding author: Feng CHEN, chen1212feng@163.com Cai-Xian ZHAO, caixianzhao@74gmail.com
Received Date: 25 September 2021
Revised Date: 14 December 2021

Figures(12)

A Z-scheme α-Fe₂O₃/g-C₃N₄ photocatalyst was successfully prepared by the method of in-situ photodeposition-calcination. The as-prepared samples were characterized by transmission electron microscopy, X-ray diffraction, X-ray photoelectron spectroscopy, UV-Vis diffuse reflectance spectroscopy, photoluminescence spectroscopy, and electrochemical test. The photocatalytic activity was evaluated by visible-light-driven water-splitting hydrogen production. The results showed that when the loading amount of α-Fe₂O₃ was 2.9%, the photocatalyst exhibited remarkably high photocatalytic activity toward H₂ evolution with a rate of 1 841.9 μmol·g^-1·h^-1, 3.3 times higher than that of pure g-C₃N₄. The enhanced performance is attributed to the following reasons: (1) α-Fe₂O₃ promotes exfoliation of g-C₃N₄ during high-temperature calcination, enlarging specific surface area and providing more active sites; (2) ultrafine α-Fe₂O₃ particles (5-8 nm) are highly uniformly dispersed on the surface of g-C₃N₄ and tightly combined to it, forming high-quality Z-scheme heterojunctions; (3) the Z-scheme structure not only effectively suppresses the photocarriers recombination, but also greatly retains the strong reduction originated from g-C₃N₄ conduction band and the strong oxidation originated from α-Fe₂O₃ valence band.
- g-C₃N₄,
- Z-scheme heterojunction,
- α-Fe₂O₃,
- photocatalytic hydrogen evolution
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通讯作者: 陈斌, bchen63@163.com

Preparation of Z-Scheme α-Fe₂O₃/g-C₃N₄ Heterojunction Based on In-Situ Photodeposition and Photocatalytic Activity for Hydrogen Production under Visible Light