Zn掺杂混晶TiO_(2)的制备及光催化性能研究  

Preparation and photocatalytic property of Zn-doped mixed crystal TiO_(2)

作　　者：朱晓东 王娟 喻强 刘辉 白昱 冯威 Zhu Xiaodong;Wang Juan;Yu Qiang;Liu Hui;Bai Yu;Feng Wei(College of Mechanical Engineering,Chengdu University,Chengdu 610106;Sichuan Xinya Non-destructive Testing Co.,Ltd.,Chengdu 610213;Zhongchao Great Wall Precious Metals Co.,Ltd.,Chengdu 611130)

机构地区：[1]成都大学机械工程学院,成都610106 [2]四川新亚无损检测有限公司,成都610213 [3]中钞长城贵金属有限公司,成都611130

出　　处：《化工新型材料》2021年第8期136-139,共4页New Chemical Materials

基　　金：四川省科技厅应用基础研究项目(19YJ0664、2018JY0062);成都市技术创新研发项目(2019-YFYF-00013-SN)。

摘　　要：采用溶胶-凝胶法制备了Zn掺杂混晶TiO_(2)纳米材料,利用XRD、SEM、PL等测试方法对其进行了表征,并以甲基蓝溶液(MB)为目标污染物进行了光催化实验,研究了Zn掺杂浓度对TiO_(2)晶型结构与光催化性能的影响。结果表明,纯TiO_(2)为锐钛矿/金红石混合晶型;Zn掺杂能促进锐钛矿向金红石相的转变;当Zn/Ti摩尔比达到8%时,有新相ZnTiO_(3)生成,并表现出最高的光催化活性。反应进行90min后,对MB的降解率达到56.2%,反应速率常数为0.0079min^(-1),分别为纯TiO_(2)的1.31倍与1.41倍。Zn-doped mixed phase TiO_(2) nanomaterials were prepared by sol-gel method and characterized by XRD,SEM and PL measurements.The photocatalytic experiment was carried out by taking methyl blue(MB)solution as the target pollutant.The effects of Zn doping concentration on the crystal structure and photocatalytic performance of TiO_(2) were studied.The results shown that pure TiO_(2) was anatase/rutile mixed phase structure,and Zn doping can promote the anataseto rutile phase transformation.When the molar ratio of Zn/Ti reached 8%,a new phase ZnTiO_(3) formed and exhibited the highest photocatalytic activity.After 90 minutes of reaction,the degradation rate of MB by 8%Zn-TiO_(2) reached 56.2% and the reaction rate constant k was 0.0079 min^(-1),which were 1.31 times and 1.41 times higher than that of pure TiO_(2).

关 键 词：二氧化钛 Zn掺杂 光催化活性 混晶 

分 类 号：TB331[一般工业技术—材料科学与工程]