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.

引用

页数：9

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