摘要
研究采用溶胶-凝胶水热法,以钛酸四正丁酯和正硅酸乙酯为前驱体,低温条件下在聚丙烯腈(PAN)纱线表面上成功负载钛硅薄膜。通过扫描电镜和x射线衍射等方法对薄膜进行表征;并对用该纱线制成的光催化反应装置进行甲基橙光催化降解特性试验。结果表明,当钛硅量比为1:4时,光催化剂薄膜均匀负载于纱线表面,且为锐钛型TiO2薄膜;钛硅薄膜PAN纱线具有明显的光催化活性,试验条件下,48h甲基橙溶液光催化脱色率达到92%,且多次使用后催化活性保持稳定;钛硅PAN纱线光催化降解甲基橙反应遵循一级反应动力学,反应速率随着污染物质量浓度升高而降低。
In this study, the TiO2-SiO2 film coated polyacrylonitrile （PAN） yarn was prepared with the sol-gel hydrothermal method, using tetrabutyl titanate and tetrabutyl orthosilicate as the precursor. The prepared yarn was characterized by SEM and XRD, and the effect of photocatalytic degradation of the methylorange solution was investigated. The results showed that, when the molarratio of tetrabutyl titanate and tetrabutyl orthosilicate was one to four, the TiO2-SiO2 film was coated on the surface of yarn successfully and the anatase was formed in the film. The TiO2-SiO2/PAN yarn showed the significant phtotcatalytic activity and good durability, the decoloration efficiency of 92% was achieved after forty-eight hours irradiation. The photocatalytic reaction with TiO2-SiO2 /PAN followed the first-order reaction kinetics, and the reaction rate was decreasing with the rising of initial concentration.
出处
《水处理技术》
CAS
CSCD
北大核心
2010年第10期44-47,共4页
Technology of Water Treatment
基金
国家"十一五"科技支撑重点项目(2006BAD01B03)
国家高技术研究发展计划(863)资助项目(2007AA06Z351)
