水热法制备银修饰混晶二氧化钛及其光催化性能研究

人工晶体学报 ›› 2022, Vol. 51 ›› Issue (4): 673-678.

水热法制备银修饰混晶二氧化钛及其光催化性能研究

朱丽^1,2, 夏杨雯³, 何莉莉³, 朱晓东³

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

收稿日期:2022-01-24 出版日期:2022-04-15 发布日期:2022-05-16
通讯作者: 朱晓东,副教授。E-mail:xiaodangjia21@126.com
作者简介:朱丽(1984—), 女,云南省人,讲师。E-mail:116439695@qq.com
基金资助:
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)

Preparation of Silver Modified Mixed Crystal TiO₂ by Hydrothermal Method and Its Photocatalytic Performance

ZHU Li^1,2, XIA Yangwen³, HE Lili³, ZHU Xiaodong³

1. College of Chemical Engineering, Yunnan Open University, Kunming 650223, China;
2. College of Chemical Engineering, Yunnan Vocational and Technical College of National Defense Industry, Kunming 650223, China;
3. School of Mechanical Engineering, Chengdu University, Chengdu 610106, China

Received:2022-01-24 Online:2022-04-15 Published:2022-05-16

摘要/Abstract

摘要： 采用水热法制备了锐钛矿、金红石、板钛矿三相混晶TiO₂,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TiO₂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@TiO₂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TiO₂对盐酸四环素(TC)的降解率由纯TiO₂的78.5%提高到91.6%。

关键词: TiO₂, 三相混晶, 水热法, Ag修饰, 光催化活性, 盐酸四环素

Abstract: The three-phase mixed crystal TiO₂of 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 TiO₂ 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@TiO₂ 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 TiO₂ increases from 78.5% to 91.6%.

Key words: TiO₂, three-phase mixed structure, hydrothermal method, Ag modification, photocatalytic activity, tetracycline hydrochloride

中图分类号:

朱丽, 夏杨雯, 何莉莉, 朱晓东. 水热法制备银修饰混晶二氧化钛及其光催化性能研究[J]. 人工晶体学报, 2022, 51(4): 673-678.

ZHU Li, XIA Yangwen, HE Lili, ZHU Xiaodong. Preparation of Silver Modified Mixed Crystal TiO₂ by Hydrothermal Method and Its Photocatalytic Performance[J]. JOURNAL OF SYNTHETIC CRYSTALS, 2022, 51(4): 673-678.

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