Fe3O4@SiO2,硅源," /> Fe3O4@SiO2,硅源,"/> Fe3O4@SiO2,silica source,"/> <a href="mailto:Fe3O4@SiO2">Fe3O4@SiO2</a>磁性催化剂载体的制备及表征
无机盐工业
主管:中海油天津化工研究设计院有限公司
主办:中海油天津化工研究设计院有限公司
   中海油炼油化工科学研究院(北京)有限公司
   中国化工学会无机酸碱盐专业委员会
ISSN 1006-4990 CN 12-1069/TQ

无机盐工业 ›› 2014, Vol. 46 ›› Issue (11): 62-.

• 论文 • 上一篇    下一篇

Fe3O4@SiO2磁性催化剂载体的制备及表征

丁冰晶1,陈文民2,范立维3,郑屹华4,吕 迪4,卢泽湘4   

  1. 1.中国蓝星(集团)股份有限公司,北京 100029;2.中国中煤能源集团有限公司;
    3.福建农林大学资源与环境学院;4.福建农林大学材料工程学院化工系
  • 出版日期:2014-11-10 发布日期:2014-11-13

Preparation and characterization of Fe3O4@SiO2 magnetic catalyst support

Ding Bingjing1,Chen Wenmin2,Fan Liwei3,Zheng Yihua4,Lü Di4,Lu Zexiang4   

  1. 1.China National Bluestar(Group) Company Limited,Beijing 100029,China;2.China National Coal Group Corp.;3.College of
    Resource and Environment Science,Fujian Agriculture and Forestry University;4.Department of Chemical Engineering,
    School of Materials Engineering,Fujian Agriculture and Forestry University
  • Published:2014-11-10 Online:2014-11-13

摘要: 以正硅酸乙酯作为硅源,采用沉淀法将四氧化三铁颗粒包覆在二氧化硅中,制备了Fe3O4@SiO2磁性催化剂载体材料。考察了氨水浓度、正硅酸乙酯浓度和四氧化三铁加入量对样品包覆率的影响,并对样品的物相和显微结构做了表征。结果表明:正硅酸乙酯可作为制备Fe3O4@SiO2磁性催化剂载体的硅源;在氨水浓度为0.4 mol/L、正硅酸乙酯浓度为0.02 mol/L、Fe3O4加入量为0.04 g的适宜反应条件下,样品包覆率为99%;二氧化硅有效包覆了四氧化三铁颗粒,但团聚较严重。

关键词: 制备, 磁性, Fe3O4@SiO2')">Fe3O4@SiO2, 硅源

Abstract: In order to prepare the Fe3O4@SiO2 magnetic catalyst support, Fe3O4 was coated by SiO2  by precipitation method with tetraethyl orthosilicate(TEOS) as silica source.The effects of NH3·H2O concentration,TEOS concentration,and addition of Fe3O4 on the coating ratio of Fe3O4@SiO2  were investigated,and the phase and microstructure of Fe3O4@SiO2  were characterized.Results showed that TEOS could be used to prepare Fe3O4@SiO2.The optimal reaction conditions were NH3·H2O concentration of 0.4 mol/L,TEOS concentration of 0.02 mol/L,and Fe3O4 addition amount of 0.04 g.Under the optimal conditions,the coating ratio of the obtained sample was 99%.The Fe3O4 particles had been incorporated into the SiO2 coating,but the conglomeration was taken place seriously in the preparation process of Fe3O4@SiO2 .

Key words: preparation, magnetism, Fe3O4@SiO2')">Fe3O4@SiO2, silica source