压电增强二硫化钼/氧化锌近红外光催化降解氨氮

doi:10.11896/cldb.22030259

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Abstract AMoS₂/ZnO piezo-photocatalyst in response to near-infrared irradiation was prepared using hydrothermal reaction. MoS₂/ZnO was characte-rized with X-ray powder diffraction(XRD), scanning electron microscopy(SEM), transmission electron microscopy(TEM), ultraviolet-visible-near-infrared diffuse reflectance spectroscopy(UV-VIS-INF-DRS), solid fluoroscopy. The facts showed that the heterojunction was formed between MoS₂ and ZnO. MoS₂/ZnO of 0.10 g was used as the photocatalyst to degrade 100.0 mg/L ammonia-nitrogen with pH 10.0 under stirring (250 r/min) and upon 850 nm near-infrared irradiation for 6 h, resulting in the degradation ratio of 90.97%, whereas the degradation ratio of ammonia-N was only 65.16% under similar conditions except for stirring. It indicated that piezo-effect enhanced the degradation of ammonia-N, which is ascribed to the enhanced separation of photo-generated electrons and holes in MoS₂ upon near-infrared irradiation. The kinetics showed the degradation reaction of ammonia follows the first-order reaction law, the average of the apparent kinetics constant is equal to 0.298 7 h^-1. The research showed solar irradiation and water waves could be used to remove ammonia in wastewaters.

Key words： MoS₂ ZnO near-infrared light piezo-effect ammonia-nitrogen degradation

Published: 10 October 2023 Online: 2023-09-28

CLC number:

O643

Fund:National Natural Science Foundation of China (21576175),the Natural Science Foundation of Jiangsu Province for Key Item of Social Development (BE2020662) and the Opening Project of Key Laboratory of Green Chemistry of Sichuan Institutes of Higher Education(LZJ1304).

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	Articles by authors
	PAN Quanzi
	LIU Wenxiao
	MENG Zeda
	LUO Li
	LIU Shouqing

Cite this article:

PAN Quanzi,LIU Wenxiao,MENG Zeda, et al. Piezo-enhanced Degradation of Ammonia-Nitrogen Based on MoS₂/ZnO Materials Upon Near-infrared Irradiation[J]. Materials Reports, 2023, 37(19): 22030259-7.

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http://www.mater-rep.com/EN/10.11896/cldb.22030259 OR http://www.mater-rep.com/EN/Y2023/V37/I19/22030259

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