硅掺杂介孔TiO_2材料的制备及可见光下降解甲基橙研究  

Synthesis of Si doped mesoporous TiO_2 and photocatalytic degradation of methyl orange under visible light

作　　者：徐会颖[1] 周国伟[1] 魏英勤[1] 李艳敬[1] 

机构地区：[1]山东轻工业学院化工学院,济南250353

出　　处：《化工新型材料》2008年第8期58-61,共4页New Chemical Materials

基　　金：山东省自然科学基金重点项目(Z2006B07);教育部留学归国人员科研启动基金

摘　　要：采用溶胶-凝胶法合成了硅掺杂的介孔TiO2材料,用X射线衍射(XRD)、透射电子显微镜(TEM)、和N2吸附脱附等分析手段对产物结构和光学性能进行了表征。分别在紫外和可见光下对甲基橙进行了降解实验,结果表明:Si/TiO2介孔材料在紫外光和可见光下均有较高的催化活性,3%Si/TiO2为催化剂,初始pH=3,催化剂用量为2g/L的条件下,分别以紫外光和可见光为激发光源降解甲基橙,甲基橙在1.5h和4h内被完全降解。Different silicon doped mesoporous TiO2 materials were synthesized by sol-gel method. The resulting materials were characterized by XRD, TEM, and nitrogen adsorption-desorption- Photocatalytic degradation of methyl orange showed that the material had high photocatalytic activity both under ultraviolet and visible irradiation. The influencing factors on the degradation of methyl orange such as initial pH value, catalyst dosage, silicon doped ratio etc. in the photocatalysis system were investigated. When 3%Si/TiO2 was used as the catalyst, initial pH was 4 and catalyst dosage was 2.0g/L, 30mg/L methyl orange could be completely degradated in 1.5h and 4h under ultraviolet and visible irradiation respectively.

关 键 词：介孔TIO2 硅掺杂 可见光催化 甲基橙 

分 类 号：O643.3[理学—物理化学]