| 核壳型CoFe2O4/TiO2磁载纳米光催化剂制备及性能 |
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| 引用本文： | 高帅,李忠义,张秀玲. 核壳型CoFe2O4/TiO2磁载纳米光催化剂制备及性能[J]. 功能材料与器件学报, 2009, 15(2) |
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| 作者姓名： | 高帅 李忠义 张秀玲 |
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| 作者单位： | 大连大学物理科学与技术学院,大连,116622;大连大学物理科学与技术学院,大连,116622;大连大学物理科学与技术学院,大连,116622 |
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| 基金项目： | Science and Technology project of educational department Liaoning Province(No.20060066);;Science Fundproject of Dalian city(No.2005A10GX109) |
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| 摘 要： | 采用化学共沉法和TiCl4水解法制备CoFe2O4磁粒子和核壳型CoFe2O4/TiO2光催化剂,在100℃烘干,350℃焙烧2 h,在紫外光源和太阳光照射下所制备的CoFe2O4/TiO2光催化剂显示出较高的甲基橙降解能力,利用外加磁场很容易将CoFe2O4/TiO2光催化剂和所处理的污水分离,并可循环使用.TEM和XRD分析结果表明:CoFe2O4粒径约为20nm,TiO2包覆的CoFe2O4粒子的粒径约为30～40nm,TiO2包覆层约为10～20nm.
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| 关 键 词： | 核壳型 CoFe2O4/TiO2 磁粒子 |
Preparation and characterization of a novel core-shell structure CoFe_2O_4/TiO_2 magnetic nano-photocatalyst |
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| GAO Shuai,LI Zhong-yi,ZHANG Xiu-ling. Preparation and characterization of a novel core-shell structure CoFe_2O_4/TiO_2 magnetic nano-photocatalyst[J]. Journal of Functional Materials and Devices, 2009, 15(2) |
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| Authors: | GAO Shuai LI Zhong-yi ZHANG Xiu-ling |
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| Affiliation: | College of physical science and technology;Dalian University;Dalian 116622;China |
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| Abstract: | The core -shell CoFe2O4/TiO2 magnetic nano -photocatalyst were prepared by hydrolysis of tita-nium tetrachloride precursor in the presence of the CoFe2O4 magnetic particles, and then be dried blew 100℃ and calcined at 350℃for 2h. The prepared photoeatalysts were easy to be separated from treated wa-ter by using an external magnetic field and shown high catalytic activity for the degradation of methyl orange in water under UV and visible - light irradiation. The morphology and the crystalline structure of the CoFe2O4TiO2 were characterized by transmission electron microscopy (TEM) and X -ray diffraction (XRD). The size of CoFe2.O4 particles was about 20 nm. The diameter of CoFe2O4/TiO2 particles is in the range of 30 -40 nm. So the shell of TiO2 enwraps closely around the core and the thickness is in the range of 10-20nm. |
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| Keywords: | CoFe2O4/TiO2 Core-shell CoFe2O4/TiO2 Magnetic photocatalyst |
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