Photocatalytic reduction of dichromate by titanium dioxide supported on hollow glass microbeads  

作　　者：陈士夫 程雪丽 

机构地区：[1]Department of Chemistry, Huaibei Coal Teachers College, Huaibei, Anhui 235000, China

出　　处：《Chinese Journal of Chemistry》1999年第4期419-424,4,共6页中国化学（英文版）

基　　金：Project (No. 97415006) supported by the Natural science Foundation of Anhui province.

摘　　要：The photocatalytic reduction of dichromate using TiO2/beads as a photocatalyst was studied. The results showed hat 3.8 × 104 mol/dm3 of dichromate can be completely reduced into Cr3+ after illumination far 35 min with a 375 W medium pressure mercury lamp. The effects of factors such as the amount of TiO2/beads, initial concentration of dichromate, initial pH, nitrogen and oxygen atmosphere, and concentration of Fe3+ on the photocatalytic reduction of dichromate were investigated. A possible mechanism of the photocatalytic reaction was proposed. After illumination for 200 h, no significant loss of photocatalytic activity of TiO2/beads was observed.The photocatalytic reduction of dichromate using TiO2/beads as a photocatalyst was studied. The results showed hat 3.8 × 104 mol/dm3 of dichromate can be completely reduced into Cr3+ after illumination far 35 min with a 375 W medium pressure mercury lamp. The effects of factors such as the amount of TiO2/beads, initial concentration of dichromate, initial pH, nitrogen and oxygen atmosphere, and concentration of Fe3+ on the photocatalytic reduction of dichromate were investigated. A possible mechanism of the photocatalytic reaction was proposed. After illumination for 200 h, no significant loss of photocatalytic activity of TiO2/beads was observed.

关 键 词：DICHROMATE photocatalytic reduction titanium dioxide hollow glass microbeads 

分 类 号：O644[理学—物理化学]