Kaolin/ZnO纳米光催化剂的制备及性能

以醋酸锌为原料,采用共沉淀法制备Kaolin/ZnO纳米光催化剂;利用XRD、SEM、FTIR对其进行表征,利用BET氮气吸附法测定比表面积;研究了催化反应时间、催化剂用量对亚甲基蓝(MB)光催化降解效果的影响。结果表明,催化剂的BET比表面积为130.86 m^2/g;当催化时间为80 min、催化剂用量为0.8 g/L时具有高催化活性,降解率可达96.82%;光催化降解MB的反应符合准一级动力学方程,反应速率常数为0.04213 min^-1。

Preparation and performances of Kaolin/ZnO nano photocatalyst

Using zinc acetate as raw material,Kaolin/ZnO nano photocatalyst was prepared by coprecipita⁃tion method,characterized by XRD,SEM and FTIR,and the specific surface area was determined by BET nitro⁃gen adsorption method.The effects of reaction time and catalyst dosage on the photocatalytic degradation of methylene blue(MB)were studied.The results showed that the BET specific surface area of the catalyst was 130.86 m^2/g.The catalyst had high catalytic activity when the reaction time was 80 min and the catalyst dos⁃age was 0.8 g/L,and the degradation rate could reach 96.82%.The photocatalytic reaction of MB degradation accorded with the pseudo first order kinetic equation,and the reaction rate constant was 0.04213 min^-1.