水生态学杂志2018，Vol.39Issue(5)：95-103,9.DOI:10.15928/j.1674-3075.2018.05.014
硫掺杂二氧化钛的光催化活性及其对微囊藻毒素的降解
Photocatalytic Activity of Sulfur Doped TiO2 and Degradation of Microcystin-LR
摘要
Abstract
In order to remove microcystin (MC-LR) more easily, efficiently and eco-friendly, the sol-gel method was used to synthesize a sulfur doped TiO2 photocatalyst (S-TiO2).The catalyst was characterized using UV-VIS diffuse reflectance spectroscopy (DRS), X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS).Photocatalytic degradation of the cyanotoxin microcystin-LR (MC-LR, 0.1μg/mL) under visible was investigated to identify optimal conditions for S-TiO2 synthesis and for MC-LR degradation.Results show that the TiO2 crystal phase is anatase and the sulfur is fully oxidized, S (VI).The optimal conditions for S-TiO2 synthesis is a mole ratio (S:Ti) of 0.25 and calcining the product at 500℃ for 3 h.The S-TiO2 photocatalyst was stable and the degradation rate decreased only 3.98％after five cycles of recovery and reuse.At a catalyst dose of 0.1 g/L and a reaction time of 16 hat 3000 lux, the MC-LR (0.1μg/mL) was completely removed (100％ degraded) and the treated water complied with algal toxin limits set by the WHO and China, which is proved to be the most effective MC-LR degradation craft.关键词
硫/二氧化钛/光催化/微囊藻毒素Key words
sulfur/titanium dioxide/photocatalysis/microcystin-LR分类
资源环境引用本文复制引用
彭晓叶,汤嘉雯,杨钧岩,孙巍峰,王旭娜,江敏..硫掺杂二氧化钛的光催化活性及其对微囊藻毒素的降解[J].水生态学杂志,2018,39(5):95-103,9.基金项目
上海市虾类产业技术体系建设项目(沪农科产字(2014)第5号 （沪农科产字(2014）
上海市教委重点学科建设项目(No.J50701) （No.J50701）
上海市高校知识服务平台项目(No.ZF1206). （No.ZF1206）
