摘要
以ZrCl4及TiOSO4为前驱物,用尿素热分解共沉淀法制备了Zr4+掺杂TiO2光催化剂Zr/TiO2,并用XRD,TEM,BET,FT-IR等表征了其物相及光催化性能.结果表明,Zr4+掺杂使TiO2纳米晶粒细化(粒径14～17nm),比表面积增大,同时有效抑制了TiO2从锐钛矿到金红石的晶型转变;Zr4+掺杂使TiO2表面的羟基数量增加,改善了对苯酚的吸附性能;Zr4+掺杂提高了TiO2的光催化活性,以4%Zr/TiO2作光催化剂,反应100min后对苯酚的降解率达100%,TOC去除率超过80%.
Zr^4＋-doped TiO2 photocatalyst was prepared by urea thermal decomposition and homogeneous co-precipitation method using TiOSO4 and ZrCl4 as precursors, the phase and photocatalytic activity of Zr/TiO2 were characterized by XRD, TEM, BET and FT-IR techniques. XRD results indicate that Zr^4＋-doped TiO2 has small crystal size （14 to 17 nm） and large specific surface area, and phase transformation from anatase to rutile is effectively inhibited. FT-IR results indicate that the presence of Zr^4＋-dopet in TiO2 accelerates its surface hydroxyl groups, and improves the adsorption characteristics of phenol. Photocatalysis results indicate that Zr^4＋ doping increases photocatalytie activity of TiO2, the degradation rate of phenol and removal rate of TOC after 100 min reaction reach as high as 100% and 80% respectivelv with 4%Zr/TiO2 photocatalyst.
出处
《过程工程学报》
CAS
CSCD
北大核心
2008年第5期1026-1029,共4页
The Chinese Journal of Process Engineering
基金
深圳市科技计划基金资助项目(编号:07K164D0)
