A chemical etching route to controllable fabrication of TiO2 hollow nanospheres for enhancing their photocatalytic activity
A chemical etching route to controllable fabrication of TiO2 hollow nanospheres for enhancing their photocatalytic activity作者机构：School of Chemical Engineering Hefei University of Technology Anhui 230009 China Anhui Key Laboratory of Controllable Chemical Reaction & Material Chemical Engineering Anhui 230009 China
出 版 物：《Frontiers of Chemical Science and Engineering》 (化学科学与工程前沿（英文版）)
年 卷 期：2013年第7卷第2期
页 面：192-201页
核心收录：
学科分类：081704[工学-应用化学] 07[理学] 08[工学] 0817[工学-化学工程与技术] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 0703[理学-化学] 070301[理学-无机化学]
基 金：the financial supports of the National Natural Science Foundation of China the Fundamental Research Funds for the Central Universities the Education Department of Anhui Provincial Government
主 题：TiO2 hollow nanospheres rhodamine B,photocatalytic activity
摘 要：The TiO2 hollow nanospheres with diameters of about 230 nm were prepared by a simple and controllable route based on hydrolysis of Ti（OBu）4 on the surfaces of the Cu20 solid nanospheres followed by inward etching of the Cu20 nanospheres. The as-prepared samples were characterized by X-ray diffraction, transmis- sion electron microscopy and scanning electron micro- scopy. The further post-heat treatment led to the high crystallization of the TiO2 hollow nanospheres. The photocatalytic performances of these samples were evaluated for the photodegradation of rhodamine B （RhB） under UV-light irradiation. The as-prepared TiO2 hollow nanospheres showed higher photocatalytic activity than the CuO and the CuO/TiO2 hollow nanospheres. Effects of temperature and time for post-heat treatment of TiO2 as well as initial RhB concentrations on the RhB photodegradation have also been studied. The results show that the TiO2 hollow nanospheres have the good reusability as photocatalysts and are promising in waste water treatment.
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