具有持续反应活性的g-C3N4/Sr2MgSi2O7:Eu2+,Dy3+复合材料的光学-催化行为研究

doi:10.11896/cldb.21110124

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Abstract In order to promote the application and popularization of environment-friendly photocatalytic technology, g-C₃N₄ was loaded on porous Sr₂MgSi₂O₇:Eu²⁺, Dy³⁺ blue long afterglow phosphors by pyrolysis polymerization to prepare g-C₃N₄/Sr₂MgSi₂O₇:Eu²⁺, Dy³⁺ composites with a persistent reaction activity. A series of indicators such as cumulative pollutant degradation efficiency were used for the first time to evaluate the comprehensive pollutant purification effect of materials under illumination and dark conditions. The effects of the mass ratio of components on the optical and catalytic properties of the composites were studied by means of micro characterization and NO removal tests. The results show that g-C₃N₄ has an adverse effect on the fluorescence intensity and afterglow properties of Sr₂MgSi₂O₇:Eu²⁺, Dy³⁺. But under illumination, the photocatalytic activity of the composite is enhanced due to the improved separation efficiency of photoinduced carriers and light absorption capacity. In the dark, Sr₂MgSi₂O₇:Eu²⁺, Dy³⁺ as an internal light source endows the composite with the ability to continuously remove NO and the duration of this ability is related to the afterglow brightness and photocatalytic activity. This study is helpful to promote the development of photocatalytic system with a continuously active.

Key words： photocatalysis long afterglow g-C₃N₄/Sr₂MgSi₂O₇:Eu²⁺,Dy³⁺ NO removal persistent reaction activity

Published: 25 June 2023 Online: 2023-06-20

CLC number:	X511
	O612

Fund:National Natural Science Foundation of China (51978115) and Chongqing Graduate Joint Training Base Construction Project (201907).

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	Articles by authors
	YANG Xiaoyu
	TANG Boming
	CAO Xuejuan
	HUANG Mingxuan
	HAO Zengheng

Cite this article:

YANG Xiaoyu,TANG Boming,CAO Xuejuan, et al. Optical-Photocatalysis Behavior of g-C₃N₄/Sr₂MgSi₂O₇:Eu²⁺, Dy³⁺ Composite with a Persistent Reaction Activity[J]. Materials Reports, 2023, 37(12): 21110124-7.

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http://www.mater-rep.com/EN/10.11896/cldb.21110124 OR http://www.mater-rep.com/EN/Y2023/V37/I12/21110124

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