改性钛白粉复合材料的制备及除污效能

Preparation and decontamination performance of modified titanium dioxide composite material

为了研究工业钛白粉复合材料的光催化性能,以钛白粉为基质,采用水热和一级煅烧法成功制备了Bi_(2)O_(3)-钛白粉和Bi_(2)O_(3)-钛白粉/PAC负载型复合材料,对比研究了钛白粉、Bi_(2)O_(3)-钛白粉和Bi_(2)O_(3)-钛白粉/PAC负载复合材料的吸附效能和光催化性能。结果表明,钛白粉对甲基橙的吸附作用较有限,去除效率较低,光催化氧化反应的去除效果可达87.5%;Bi与Ti摩尔比为12%时,Bi_(2)O_(3)-钛白粉/PAC负载型复合材料对甲基橙的光催化降解效果最优,可达87.5%;相较而言,Bi_(2)O_(3)-钛白粉/PAC复合材料对甲基橙的吸附作用和光催化降解效果最优,吸附率为41.3%,光催化降解效率为89.7%。

In order to study the photocatalytic performance of industrial titanium dioxide composite materials,this paper used titanium dioxide as the matrix and successfully prepared Bi_(2)O_(3)-titanium dioxide and Bi_(2)O_(3)-titanium dioxide/PAC supported composites by hydrothermal/primary calcination method.The photocatalytic properties of titanium dioxide,Bi_(2)O_(3)-titanium dioxide and Bi_(2)O_(3)-titanium dioxide/PAC supported composites were studied.The results show that the adsorption effect of titanium dioxide on methyl orange is relatively limited,the removal efficiency is low,and the removal effect of photocatalytic oxidation reaction can reach 81.3%;when the molar ratio of Bi to Ti is 12%,Bi_(2)O_(3)-titanium dioxide/PAC-supported The composite material has the best photocatalytic degradation effect on methyl orange,up to 87.5%;in comparison,the adsorption effect and photocatalytic degradation effect of the three materials on methyl orange is the best is Bi-titanium dioxide/PAC,the adsorption rate is 41.3%,and the photocatalytic degradation efficiency is 89.7%.