LaVO_(4)/TiO_(2)在分解甲基橙中的光催化性能研究

PHOTOCATALYTIC PERFORMANCE OF LAVO_(4)/TIO_(2) IN THE DECOMPOSITION OF METHYL ORANGE

光催化剂TiO_(2)在污水有机物降解中有着巨大优势,但由于对光的利用率过低,需要在TiO_(2)的基础上进行掺杂来改善其光催化性能。本研究利用稀土镧元素对TiO_(2)进行了掺杂分别制备了LaVO_(4)/TiO_(2)和La(NO3)3/TiO_(2)复合光催化剂,并将它们应用于甲基橙的光催化降解反应,证实了LaVO_(4)对TiO_(2)的光催化效果有较明显的增强作用。另外还研究了不同pH条件制备和不同掺杂比例的LaVO_(4)/TiO_(2)光催化效果,pH在10.56左右制备出的LaVO_(4)和掺杂比例为5%的LaVO_(4)制得的LaVO_(4)/TiO_(2)复合光催化剂效果较好。

Photocatalyst TiO_(2)has great advantages in the water pollution control and degradation of organic matter in sewage,but due to the low utilization rate of light,it is necessary to dope on the basis of TiO_(2)to improve its photocatalytic performance.In this paper,LaVO_(4)/TiO_(2)and La(NO3)3/TiO_(2)composite photocatalysts were prepared by doping TiO_(2)with rare earth lanthanum,respectively,and they were applied to the photocatalytic degradation of methyl orange,confirming that the photocatalytic effect of LaVO_(4)on TiO_(2)was obviously enhanced.In addition,the photocatalytic effects of LaVO_(4)/TiO_(2)prepared under different pH conditions and different doping ratios were also studied,LaVO_(4)prepared at pH around 10.56 and LaVO_(4)/TiO_(2)composite photocatalyst prepared by doping ratio of 5%LaVO_(4)had better effects.