液相沉积法制备可磁分离复合光催化剂纳米球及其催化性能

采用反胶束和液相沉积法制备了一种可磁分离的复合光催化剂纳米球TiO2@SiO2@NiFe2O4,并运用X射线衍射和透射电镜对样品进行了表征.结果表明,NiFe2O4纳米粒子被包裹在SiO2内形成磁性SiO2@NiFe2O4纳米球载体,纳米TiO2粒子沉积于其表面,形成TiO2光催化壳层.光降解实验结果表明,当沉积液中硼酸与六氟钛酸铵的摩尔比为4,焙烧温度为300C时,制备的纳米球催化剂表现出最佳的光催化活性....

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Bibliographic Details
Published in催化学报 Vol. 34; no. 2; pp. 367 - 372
Main Author 许士洪 谭东栋 鲁巍 时鹏辉 毕得福 马春燕 上官文峰
Format Journal Article
LanguageChinese
Published 东华大学环境科学与工程学院,上海,201620%北京市市政设计研究总院,北京,100082%上海交通大学机械与动力工程学院燃烧与环境技术研究中心,上海,200240 2013
Subjects
二氧化硅
二氧化钛
光催化
包覆
液相沉积
纳米球
铁酸镍
coating
liquid-phase deposition
液相沉积
silica
nickel ferrite
光催化
纳米球
包覆
nanosphere
titania
二氧化钛
铁酸镍
photocatalysis
二氧化硅
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Summary:采用反胶束和液相沉积法制备了一种可磁分离的复合光催化剂纳米球TiO2@SiO2@NiFe2O4,并运用X射线衍射和透射电镜对样品进行了表征.结果表明,NiFe2O4纳米粒子被包裹在SiO2内形成磁性SiO2@NiFe2O4纳米球载体,纳米TiO2粒子沉积于其表面,形成TiO2光催化壳层.光降解实验结果表明,当沉积液中硼酸与六氟钛酸铵的摩尔比为4,焙烧温度为300C时,制备的纳米球催化剂表现出最佳的光催化活性.
Bibliography:XU Shihonga,*, TANDongdonga, LU Weib, SHI Penghuia, BI Defua, MA Chunyana,SHANGGUAN Wenfengc aCollege of Environmental Science and Engineering, Donghua University, Shanghai 201620 bBeijing General Municipal Engineering Design & Research Institute, Beijing 100082 cResearch Center for Combustion and Environment Technology, School of Mechanical and Power Engineering, Shanghai Jiao Tong University, Shanghai 200240
titania;silica;nickel ferrite;photocatalysis;nanosphere;liquid-phase deposition;coating
A novel magnetically separable composite photocatalyst nanosphere TiO2@SiO2@NiFe2O4 was prepared by a reverse micelle method and liquid phase deposition techniqueand characterized by X-ray diffraction and transmission electron microscopy.The results indicated that the nickel ferrite core nanoparticles are completely encapsulated into silica nanospheres as a support(SiO2@NiFe2O4), and titania nanoparticles are deposited onto the surface of SiO2@NiFe2O4 nanospheres, forming a TiO2 shell for photocatalysis.The degradation
ISSN:0253-9837
1872-2067
DOI:10.3724/SP.J.1088.2013.20766