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| 磁性纳米TiO2/SiO2/Fe3O4光催化剂的制备及表征 | |
| 引用本文： | 廖振华,陈建军,姚可夫,赵方辉,李荣先.磁性纳米TiO2/SiO2/Fe3O4光催化剂的制备及表征[J].无机材料学报,2004,19(4):749-754. |
| 作者姓名： | 廖振华 陈建军 姚可夫 赵方辉 李荣先 |
| 作者单位： | 1. 清华大学机械工程系,北京,100084;清华大学深圳研究院新材料与生物工程重点实验室,深圳,518057 2. 清华大学深圳研究院新材料与生物工程重点实验室,深圳,518057 3. 清华大学机械工程系,北京,100084 |
| 基金项目： | 深圳市科技三项经费资助项目(2002年) |
| 摘 要： | 以纳米Fe3O4磁粉为核心，采用溶胶一凝胶法制备了TiO2／SiO2／Fe3O4复合光催化剂．用XRD、TEM及元素分析对其结构和表面形貌进行了表征．以具有偶氮染料结构的甲基橙水溶液为目标反应物，评价其光催化活性．结果表明，所制TiO2／SiO2／FeaO4样品为双层包覆型结构，SiO2为中间层，最外层是锐钛矿型的TiO2,该复合光催化剂对甲基橙溶液有较高的光催化活性，并具有可利用其磁性回收重用的特点，应用前景广泛。 |
| 关 键 词： | TiO2／SiO2／Fe3O4 包覆 磁性 光催化 |
| 文章编号： | 1000-324X(2004)04-0749-06 |
| 收稿时间： | 2003-6-27 |
| 修稿时间： | 2003-9-11 |
Preparation and Characterization of Nanometer-sized Magnetic Photocatalyst TiO2/SiO2/Fe3O4 |
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| LIAO Zhen-Hua,CHEN Jian-Jun,YAO Ke-Fu,ZHAO Fang-Hui,LI Rong-Xian.Preparation and Characterization of Nanometer-sized Magnetic Photocatalyst TiO2/SiO2/Fe3O4[J].Journal of Inorganic Materials,2004,19(4):749-754. | |
| Authors: | LIAO Zhen-Hua CHEN Jian-Jun YAO Ke-Fu ZHAO Fang-Hui LI Rong-Xian |
| Affiliation: | 1.DepartmentofMechanicalEngineering;TsinghuaUniversity;Beijing100084;China;2.NewMaterialsandBio-TechnologyKeyLaborary;ResearchInstituteofTsinghuaUniversityinShenzhen;Shenzhen518057;China |
| Abstract: | By using nanometer-sized Fe3O4 as support, TiO2/SiO2/Fe3O4 coated particles were prepared by a sol-gel method. Its structure and morphology were characterized by XRD, TEM, and element analysis methods. The photocatalytic reactivity of TiO2/SiO2/Fe3O4 was studied with methyl orange solution. The results indicate that the TiO2/SiO2/FesO4 two-double coated particles are composed of SiO2 mesosphere and anatase TiO2 crust. The new photocatalyst has not only excellent photocatalytic activity but also good magnetic property that can make the callback easy. |
| Keywords: | TiO2/SiO2/Fe3O4 coating magnetic photocatalysis |
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