TiO_2/beads as a photocatalyst for the degradation of X_(3B) azo dye  

作　　者：CHENShi－fu CAOGeng－yu 

机构地区：[1]DepartmentofChemicalPhysics,UniversityofScienceandTechnologyofChina,Hefei230026，China [2]DepartmentofChemistry,HuaibeiCoalTeachersCollege,Huaibei235000,China.

出　　处：《Journal of Environmental Sciences》2003年第1期83-87,共5页环境科学学报（英文版）

基　　金：TheNaturalScienceFoundationofAnhuiProvince (No.0 10 4 5 30 4 )andtheNaturalScienceFoundationofEducationCommitteeofAnhuiProvince (No.2 0 0 2kj2 4 7)

摘　　要：The feasibility of photocatalytic degradation of X 3B azo dye by TiO 2/beads photocatalyst was studied. The effects of parameters such as the amount of TiO 2/beads, airflow, as well as the concentrations of H 2O 2, Fe 3+ , Mg 2+ and Na + on the photocatalytic degradation of X 3B azo dye were also studied. The results showed that 25 mg/dm 3 X 3B azo dye can be photocatalytically degraded completely by 30 min illumination with a 375W medium pressure mercury lamp. Adding a small amount of H 2O 2 or Fe 3+ , the efficiencies of photocatalytic degradation of X 3B azo dye were increased rapidly. The mechanisms of the reaction and the role of the additives were also investigated. After 120 hours TiO 2/beads showed no significant loss of the photocatalytic activity.The feasibility of photocatalytic degradation of X 3B azo dye by TiO 2/beads photocatalyst was studied. The effects of parameters such as the amount of TiO 2/beads, airflow, as well as the concentrations of H 2O 2, Fe 3+ , Mg 2+ and Na + on the photocatalytic degradation of X 3B azo dye were also studied. The results showed that 25 mg/dm 3 X 3B azo dye can be photocatalytically degraded completely by 30 min illumination with a 375W medium pressure mercury lamp. Adding a small amount of H 2O 2 or Fe 3+ , the efficiencies of photocatalytic degradation of X 3B azo dye were increased rapidly. The mechanisms of the reaction and the role of the additives were also investigated. After 120 hours TiO 2/beads showed no significant loss of the photocatalytic activity.

关 键 词：X  3B   azo dye photocatalytic degradation titanium dioxide hollow glass microbeads 

分 类 号：X788.1[环境科学与工程—环境工程] X703