La^(3+)/ZnO净化黄河流域水质研究  

Photocatalytic degradation of malachite green with La^(3+)/ZnO Prepared by Hydrothermal Mthode

作　　者：郝家兴 刘丽静[1] Hao Jiaxing;Liu Lijing(Baotou Teachers College,Baotou 014030,China)

机构地区：[1]包头师范学院,内蒙古包头014030

出　　处：《内蒙古石油化工》2024年第12期6-10,共5页Inner Mongolia Petrochemical Industry

基　　金：内蒙古自治区本科教学改革项目JGYB2022053;包头师范学院大学生创新创业训练项目;包头师范学院创新创业教育科研项目BSSC21Y002;包头师范学院科研项目BSYKJ2022-ZY02。

摘　　要：稀土元素因为特殊核外电子排布,使其具有特殊的光电性能,稀土La掺杂ZnO后能提高催化剂的活性。实验采用超声波水热法合成不同稀土掺杂量,不同煅烧温度La^(3+)/ZnO催化剂,通过XRD表征可知:稀土镧掺杂的样品ZnO晶体均为六方纤锌矿结构,并且随着掺杂稀土镧浓度的增大,催化剂的粒径减小,比表面积不断增大。红外表征可知:掺杂稀土镧改善了氧化锌的表面状态,有利于产生更多的羟基自由基,进而增加光催化活性。以孔雀石绿溶液为目标降解物,在自然光照射下,nLa^(3+):nZnO=0.2%(摩尔比),烧结温度500℃,反应3.5h,降解率可达99.0%;光催化反应动力学理论模拟符合一级动力学反应。Rare earths have special photoelectric properties because of the arrangement of extranuclear electrons.The La^(3+)/ZnO photocatalyst with different amounts of doped La^(3+)and under different calcination temperatures were synthesized by hydrothermal method,and characterized by XRD and FT-IR and photocatalytic activity.Malachite green experiment was chosen to evaluate photocatalyst’s activity.The results showed that the obtained powder is wurtzite structure,and with the La doped,which indicating that La^(3+)doped rare earth can refine the grain.The photocatalytic material experiments of malachite green degraded showed that,calcined at 500℃,La^(3+)/ZnO molar ratio of 0.2% catalyst,irradiated without lighting 3.5h,the degradation rate could be 99.0%.The reaction is a first order kinetic process.

关 键 词：水热法 La^(3+)掺杂ZnO 光催化活性 动力学反应 

分 类 号：O643[理学—物理化学]