光催化
材料科学
涂层
化学工程
镁
紫外线
降级(电信)
甲苯
复合材料
冶金
化学
催化作用
有机化学
电信
光电子学
计算机科学
工程类
作者
Y. Fang,Chen Shu,Lu Yang,Xue Cheng,Ping Luo,Xiuqin Xu
出处
期刊:Catalysts
[MDPI AG]
日期:2022-04-08
卷期号:12 (4): 420-420
被引量:1
标识
DOI:10.3390/catal12040420
摘要
Photocatalytic oxidation is a technology developed in recent years for the degradation of indoor air pollutants. In this study, magnesium cement-based photocatalytic material (MPM) was prepared by loading TiO2 photocatalysts onto a SiO2-modified basic magnesium chloride whisker (BMCW) surface, and was subsequently sprayed evenly on the surface of putty powder to form a photocatalytic functional wall coating (PFWC) material. Then, by introducing Ag, visible light photocatalytic functional wall coating (VPFWC) materials were also prepared. The results show that TiO2 and SiO2 form Ti–O–Si bonds on the BMCW surface, and the PFWC presents a promising degradation effect, with a photocatalytic removal rate of 46% for gaseous toluene, under ultraviolet light for 3 h, and an MPM coating concentration of 439 g/m2. This is related to the surface structure of the functional coating, which is formed using putty powder and MPM. The visible light photocatalytic efficiency of the VPFWC increased as the spraying amount of the AgNO3 solution increased, up to 16.62 g/m2, and then decreased with further increasing. The gaseous toluene was degraded by 28% and 73% in 3 h, by the VPFWC, under visible light and ultraviolet light irradiation, respectively. In addition, the photocatalytic performance of the PFWC/VPFWC also showed excellent durability after being reused five times.
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