高等学校化学学报2012，Vol.33Issue(7)：1511-1516,6.DOI:10.3969/j.issn.0251-0790.2012.07.027
类蛋结构的可磁分离光催化剂纳米球的制备及催化性能
Preparation and Photocatalytic Properties of Magnetically Separable Photocatalyst Nanospheres with Egg-like Structure
摘要
Abstract
A novel magnetically separable photocatalyst nanosphere TiO2@ SiO2@ NiFe2O4(TSN) with egg-like structure was prepared by reverse micelles method and electrostatic self-assembly method. The photocatalyst shows high photocatalytic activity for the degradation of methyl orange in water. The magnetic property measurements indicate that the photocatalyst possesses a superparamagnetic nature, which can be separated and recycled conveniently through an external magnetic field. X-ray diffractometer ( XRD) and transmission electron microscope ( TEM) were used to characterize the structure of the TSN photocatalyst nanosphere. The results indicate that nickel ferrite core nanoparticles are completely encapsulated into silica nanospheres as carrier, and titania nanoparticles are assembled onto the surface of SN nanospheres, forming a TiO2 shell for photocatalysis. The SiO2 layer between the NiFe2O4 core and the TiO2 shell effectively prevents the injection of charges from TiO2 particles to NiFe2O4, which gives rise to an increase in photocatalytic activity.关键词
光催化剂纳米球/磁分离/类蛋结构/二氧化钛Key words
Photocatalyst nanospheres/ Magnetically separable/ Egg-like structure/ TiO2分类
化学化工引用本文复制引用
许士洪,赵松建,谭东栋,时鹏辉,毕得福..类蛋结构的可磁分离光催化剂纳米球的制备及催化性能[J].高等学校化学学报,2012,33(7):1511-1516,6.基金项目
上海市自然科学基金(批准号:11ZR1400400)、中央高校基本科研业务费专项基金(批准号:12D11303)和上海市重点学科建设项目(批准号:B604)资助. （批准号:11ZR1400400）
