Preparation and characterization of core-shell γ-Fe2O3@SiO2@ Al2O3 magnetic catalyst

摘要：

Magnetic catalyst was made of magnetic core and surface coating layer and obtained a core-shell complex materials. The magnetic γ-Fe2O3 core has a relatively higher saturation magnetization, coercivity and good thermal stability even at 500℃. In order to prevent magnetic core forming spinel structure and migrating of Fe3+, a layer of silicon dioxide was coated by sol-gel method. During the process iron atoms scattered in –Si-O-Si- network and produced a γ-Fe2O3@SiO2 structure. Finally, the γ-Fe2O3@SiO2 powder was put into the alumina sol and evenly sprayed into a column of oil, after calcination the carrier of alumina layer was prepared.

关键词： Magnetic catalyst Sol-gel method magnetically stabilized bed γ-Fe2O3

作者: Lianqing Yu Xiaoliang Zhong Yaping Zhang Chenguang Liu

作者单位: China University of Petroleum (huadong), College of Physical Science and Technology, Dongying257061, China University of Petroleum (huadong), College of Physical Science and Technology, Dongying 257061

会议类型: 国际会议

会议名称: 11th IUMRS International Conference in Asia(第十一届国际材联亚洲材料大会 IUMRS-ICA 2010)

会议地点: 青岛

会议语种:英文

页码: 223-227

在线出版日期: 2010-09-25（万方平台首次上网日期，不代表论文的发表时间）