水热法制备银修饰混晶二氧化钛及其光催化性能研究  

Preparation of Silver Modified Mixed Crystal TiO_(2) by Hydrothermal Method and Its Photocatalytic Performance

作　　者：朱丽[1,2] 夏杨雯 何莉莉 朱晓东 ZHU Li;XIA Yangwen;HE Lili;ZHU Xiaodong(College of Chemical Engineering, Yunnan Open University, Kunming 650223, China;College of Chemical Engineering, Yunnan Vocational and Technical College of National Defense Industry, Kunming 650223, China;School of Mechanical Engineering, Chengdu University, Chengdu 610106, China)

机构地区：[1]云南开放大学化学工程学院,昆明650223 [2]云南国防工业职业技术学院化学工程学院,昆明650223 [3]成都大学机械工程学院,成都610106

出　　处：《人工晶体学报》2022年第4期673-678,686,共7页Journal of Synthetic Crystals

基　　金：云南开放大学云南国防工业职业技术学院校级科学研究基金课题(21YNOU01);四川省2021-2023年高等教育人才培养质量和教学改革项目(JG2021-1104);成都大学2021-2023年人才培养质量和教学改革项目(cdjgb2022033);成都大学大学生创新训练计划孵化培育项目(CDUCX2022006,CDUCX2022016)。

摘　　要：采用水热法制备了锐钛矿、金红石、板钛矿三相混晶TiO_(2),对其进行了Ag修饰改性。利用XRD、SEM、TEM、PL、DRS等测试技术研究了样品的晶体结构、形貌以及光学性质。结果表明,制备的TiO_(2)为锐钛矿/金红石/板钛矿三相混晶结构,Ag修饰后金红石含量增加,锐钛矿、板钛矿含量减小。Ag以单质Ag以及AgCl的形式存在,Ag@TiO_(2)异质结构更加有利于光生电荷的转移,提高了光催化活性。光照90 min后,银修饰TiO_(2)对盐酸四环素(TC)的降解率由纯TiO_(2)的78.5%提高到91.6%。The three-phase mixed crystal TiO_(2) of anatase,rutile and brookite was prepared by hydrothermal method,and modified with Ag.The crystal structure,morphology and optical property of samples were investigated by XRD,SEM,TEM,PL and DRS.The results show that the prepared TiO_(2) exhibits a three-phase mixed crystal structure of anatase/rutile/brookite.After Ag modification,the content of rutile increases,and the content of anatase and brookite decrease.Ag element exists in the form of elemental Ag and AgCl.Ag@TiO_(2) heterostructure is more favorable to the transfer of photoinduced charges and improves the photocatalytic activity.After illumination 90 min,the degradation rate of tetracycline hydrochloride(TC)by Ag modified TiO_(2) increases from 78.5%to 91.6%.

关 键 词：TiO_(2) 三相混晶 水热法 Ag修饰 光催化活性 盐酸四环素 

分 类 号：O643.36[理学—物理化学] O644.1[理学—化学]