Photocatalytic persulfate activation by highly dispersed nano-TiO2 supported by silica for efficient carbamazepine degradation

被引：3
作者：
Li, Rui [1 ]
Wu, Zewei [1 ]
Yang, Yiyun [2 ]
Sun, Sijia [1 ]
Tu, Yu [1 ]
Ding, Hao [1 ]
机构：
[1] China Univ Geosci Beijing, Sch Mat Sci & Engn, Beijing 100083, Peoples R China
[2] China Univ Geosci Beijing, Sch Water Resources & Environm, Beijing 100083, Peoples R China
来源：
CHEMICAL PHYSICS LETTERS | 2024年 / 840卷
关键词：
Silica; Nano-TiO2; Composite photocatalyst; PMS; Degradation; HYDROXYL RADICALS; RATE CONSTANTS; WATER; PPCPS; TIO2; REMOVAL;
D O I：
10.1016/j.cplett.2024.141157
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
A silica-loaded nano-TiO2 composite (A-SiO2/TiO2) was prepared by wet-grinding method, using industrial silica (A-SiO2) as the carrier. A-SiO2/TiO2 was used for photocatalytic activation of peroxymonosulfate (PMS) to degrade carbamazepine (CBZ). The A-SiO2/TiO2 containing 20 wt% nano-TiO2 resulted in the CBZ degradation efficiency of 94.83 % after 90 min simulated sunlight irradiation with the presence of PMS. The main reactive species during CBZ degradation in the system of photocatalytic PMS activation by A-SiO2/TiO2 were O-2(center dot-), center dot OH and SO4 center dot-. Compared to nano-TiO2, A-SiO2/TiO2 exhibits enhanced dispersion, increased surface active sites and improved photo-generated carrier separation efficiency, which contributed to enhanced degradation performance.
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页数：9
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