【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。更多还原

【Abstract】 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 calcination 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）:m（silica gel） was 0.05/1000.Degradation degree of phenol increaseed as pH of solution was less and larger than 6.更多还原