摘要：以白炭黑和TiCl₄为原料, 利用低温水解沉淀方法在白炭黑载体表面负载纳米TiO₂, 采用煅烧工艺将白炭黑负载的纳米TiO₂复合粉体进行晶化, 并对煅烧后的复合粉体进行晶体结构和光催化性能的表征。结果表明, 700℃煅烧2 h得到的样品, 在200 W高压汞灯的照射下, 35 min时对罗丹明B的脱色率达到96.23%。

关键词：白炭黑;纳米TiO₂;光催化

Abstract：Taking precipitated silica and TiCl₄ as raw materials, a kind of coated nano-sized TiO₂ composite photocatalysts was prepared by the means of hydrolysis-depositing method. The effect of calcination on crystal structure and photocatalytic activity of the composite photocatalysts was investigated. The results show that the decolorization rate of rhodamine B of the composite photocatalysts calcined at 700 ℃ for 2 h is 96.23% under the irradiation of 200 W Hg lamp for 35 min.

Keywords：precipitated silica; TiO₂nano-particle; photocatalysis