Citation: WANG Min, TAN Guo-Qiang, ZHANG Dan, LI Bin, WANG Ying, DANG Ming-Yue, REN Hui-Jun, XIA Ao, LIU Yun. Synthesis and Mechanism of Direct Z-Scheme Zn₂SnO_4-xN_x/ZnO_1-yN_y Heterojunction Photocatalyst[J]. Chinese Journal of Inorganic Chemistry, ;2019, 35(9): 1551-1560. doi: 10.11862/CJIC.2019.161 shu

Synthesis and Mechanism of Direct Z-Scheme Zn₂SnO_4-xN_x/ZnO_1-yN_y Heterojunction Photocatalyst

WANG Min ¹ ,
TAN Guo-Qiang ^1,, ,
ZHANG Dan ¹ ,
LI Bin ¹ ,
WANG Ying ¹ ,
DANG Ming-Yue ¹ ,
REN Hui-Jun ² ,
XIA Ao ¹ ,
LIU Yun ³

1.
Shaanxi Key Laboratory of Green Preparation and Functionalization for Inorganic Materials, School of Materials Science and Engineering, Shaanxi University of Science & Technology, Xi'an 710021, China
2.
School of Arts and Sciences, Shaanxi University of Science & Technology, Xi'an 710021, China
3.
School of Electronic Information and Artificial Intelligence, Shaanxi University of Science & Technology, Xi'an 710021, China

Corresponding author: TAN Guo-Qiang, tan3114@163.com
Received Date: 17 March 2019
Revised Date: 21 May 2019

Figures(12)

The direct Z-scheme Zn₂SnO_4-xN_x/ZnO_1-yN_y heterojunction photocatalyst was successfully prepared via a microwave-assisted solvothermal method. N atoms were introduced in to the lattices of Zn₂SnO₄ and ZnO by replacing O atoms to form Zn₂SnO_4-xN_x and ZnO_1-yN_y units, resulting in the formation of N impurity levels at the top of valence band (VB). The transformation from Ⅰ-type to Ⅱ-type, and then to Z-scheme heterojunction of Zn₂SnO_4-xN_x/ZnO_1-yN_y was attributed to the rearrangement of interface charge distribution induced by the different work functions and the construction of build-in electron field. The photocatalytic activity of heterojunction photocatalyst was evaluated by the photo-degradation of RhB under UV light irradiation. The degradation rate of RhB over Zn₂SnO_4-xN_x/ZnO_1-yN_y heterojunction photocatalyst was 1.40~1.43 times higher than that of two pure Zn₂SnO_4-xN_x samples. Methylene blue, methyl orange and salicylic acid could be degraded over Zn₂SnO_4-xN_x/ZnO_1-yN_y heterojunction photocatalyst, which also exhibited good cyclic stability. The high photocatalytic activity of Zn₂SnO_4-xN_x/ZnO_1-yN_y heterojunction photocatalyst was ascribed to the synergistic effects between Z-scheme heterojunction and double impurity levels due to the enhanced redox ability and improved separation efficiency of photoinduced charge carriers.
- photocatalysis,
- nitrogen doping,
- Z-scheme,
- Zn₂SnO_4-xN_x,
- ZnO_1-yN_y
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沈阳化工大学材料科学与工程学院沈阳 110142

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通讯作者: 陈斌, bchen63@163.com

Synthesis and Mechanism of Direct Z-Scheme Zn₂SnO_4-xN_x/ZnO_1-yN_y Heterojunction Photocatalyst