硅酸盐学报2013，Vol.41Issue(4)：567-574,8.DOI:10.7521/j.issn.0454-5648.2013.04.23
氧化铋/硅藻土复合光催化剂的制备及其可见光催化性能
Preparation and Visible-light Photocatalytic Properties of Bi2O3/Diatomite Composite Photocatalyst
摘要
Abstract
Bi2O3/diatomite composite photocatalysts in a mass ratio of Bi2O3 to diatomite range from 0.10:1.00 to 0.60:1.00 were prepared via freeze-drying and subsequent calcination in air. The as-prepared Bi2O3Vdiatomite composite photocatalysts were characterized by X-ray diffraction, field emission scanning electron microscope and N2 adsorption-desorption measurement as well. The photocatalytic properties of the samples were investigated through the photocatalytic degradation of methylene blue (MB) under visible light irradiation using a 500 W Xe lamp. The results show that the Bi2O3 nanoparticles with the particle size of 31.7 nm can be well dispersed on the diatomite surface. With the porous structure of diatomite and the photocalalytic properties of Bi2O3, the Bi2O3/diatomite composite photocatalysts gave a better photocalalytic property under visible light irradiation, and the degradation rate of MB (20 mg/L) reached > 90% after 2 h visible light irradiation over the composite Bi2O3/diatomite of 0.40:1.00 (in mass ratio).关键词
硅藻土/氧化铋/冷冻干燥/亚甲基蓝/可见光催化Key words
diatomite/ bismuth oxide/ freeze-drying/ methylene blue/ visible light photocalalytic分类
通用工业技术引用本文复制引用
李焕,张青红,王宏志,李耀刚..氧化铋/硅藻土复合光催化剂的制备及其可见光催化性能[J].硅酸盐学报,2013,41(4):567-574,8.基金项目
国家科技支撑计划(2006BAA04B02-01) （2006BAA04B02-01）
上海市重点学科建设项目(B603)资助. （B603）
