摘要
以硅胶为载体、钛酸丁酯为原料,通过微乳液法制得平均晶粒度为6.3nm的锐钛矿型纳米TiO2负载催化剂。研究了焙烧温度、m(TiO2):m(硅胶)、溶液pH对紫外光照射下纳米TiO2降解溶液中苯酚的光催化活性的影响。结果表明,焙烧温度从400℃提高到700℃时,TiO2晶粒度从6.3nm增加到的83.2nm,而催化活性先增大后降低,在450℃时催化活性最大,苯酚的去除率45.6%;随着m(TiO2):m(硅胶)的减小,催化剂活性先增加后降低,在TiO2:硅胶(质量比)为0.05/1000时催化剂活性达到最大;溶液pH值小于6时,苯酚去除率随pH值减小而增大,但变化并不太明显;pH值大于6时,苯酚去除率随pH值增大而增大。
Supported nanometre TiO2 catalysts were prepared by microemulsion method, using Ti（OC4H9 ）4 and silica gel as raw materials. The effects of calcination temperature, m（TiO2 ） ： m（silica gel）, pH of solution on TiO2 photocatalytic degradation of phenol in solution with ultraviolet radiation were studied. The results showed that when calci nation temperature was increased from 400℃ to 700℃, the average crystal granularity of anatase TiO2 increased from 6.3 nm to 83. 2nm, photocatalytic activity was highest at 450℃ at which degradation degree of phenol was 45. 6%. Photocatalytic activities reached highest when m（TiO2 ） ：re（silica gel） was 0. 05/1000. Degradation degree of phenol increaseed as pH of solution was less and larger than 6.
出处
《化工新型材料》
CAS
CSCD
北大核心
2006年第1期54-56,共3页
New Chemical Materials
关键词
负载纳米TIO2
制备
光催化活性
苯酚
supported nanometre TiO2, preparation, photocatalytic activity, phenol
