期刊
JOURNAL OF ALLOYS AND COMPOUNDS
卷 906, 期 -, 页码 -出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2022.164371
关键词
Photocatalyst; NaLa(WO4)(2)/g-C3N4; Z-scheme heterostructure; In-situ DRIFTS
资金
- Talent Planning Project of Chongqing [CQYC201903053]
- Project of Chongqing Science and Technology Bureau [cstc2020jscx-msxmX0 096, csts2020jcyj-msxmX0335]
- Science and Technology Research Project of Chongqing [KJZD-M201800801, KJQN201800838]
- Chongqing Technology and Business University Open Fund Project [KFJJ2018051]
A novel NaLa(WO4)(2)/g-C3N4 photocatalyst with Z-scheme heterojunction was successfully synthesized, showing high NO purification efficiency, which provides a new direction for photocatalytic treatment of NO in the environment.
In this paper, a novel NaLa(WO4)(2)/g-C3N4 photocatalyst with Z-scheme heterojunction was synthesized for the first time, and the photocatalytic purification of NOx was used as an evaluation method of its activity. The structure was analyzed in depth by X-ray Diffraction (XRD), X-ray Photoelectron Spectroscopy (XPS), Scanning Electron Microscopy (SEM), Transmission Electron Microscopy (TEM) and other characterization methods. NaLa(WO4)(2) and g-C3N4 have obvious interfaces and successfully constructed a Z-scheme heterojunction structure. The combination of photogenerated electrons on the conduction band (CB) of NaLa (WO4)(2) with holes on the valence band (VB) of g-C3N4 leads to the accumulation of the remaining holes and electrons on the VB of NaLa(WO4)(2) and CB of g-C3N4, and finally realizes the effective separation of photogenerated carriers and maintains the high redox ability of the catalyst. The NaLa(WO4)(2)/g-C3N4 composite catalyst has a highest NO purification rate of 47.18%, which is 16.51% higher than pure g-C3N4. Moreover, the In-situ DRIFTS monitors the reaction intermediates and final products of NO on the NaLa(WO4)(2)/g-C3N4 heterojunction surface under visible light irradiation, and provides the corresponding reaction equations. This work provides a new type of photocatalyst that is easy to prepare and highly active, as well as a low-cost photocatalytic treatment technology to remove NO in the environment. (c) 2022 Elsevier B.V. All rights reserved.
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