标题：Mesoporous iron oxide-silica supported gold catalysts for low-temperature CO oxidation作者：Zhang, Weidong; Lu, Xiaofei; Zhou, Weili; Wu, Feng; Li, Jinjun

来源出版物：CHINESE SCIENCE BULLETIN 卷：59期：31 页：4008-4013 DOI：10.1007/s11434-014-0394-3 出版年：NOV 2014

摘要：Mesoporous iron oxide-silica composite with a high silica content was synthesized by hydrothermal method, and another composite material with a high iron content was obtained by etching part of silica in alkaline solution. Gold catalysts were loaded onto both composites by a deposition-precipitation method, and used for CO oxidation. The samples were characterized by Brumauer-Emmet-Teller (BET), X-ray diffraction (XRD), X-ray photoelectron spectra (XPS), transmission electron microscope (TEM) and scanning electron microscope (SEM) techniques. Both composites had high specific surface areas and were amorphous. The Au nanoparticles dispersed on the surface of the composites existed in metallic state. Composite with high silica content was not suitable for Au loading, and its supported gold catalyst showed poor performance in catalytic reaction. In contrast, composite with high iron content allowed efficient Au loading, and CO could be oxidized completely at low temperature on its supported gold catalyst. The effects of deposition-precipitation pH values on Au loading and activity of the catalyst were investigated, and the results indicated that Au loading was the highest and the catalyst was the most active for CO oxidation when the synthesis pH was adjusted to 8.

入藏号：WOS:000342421100009

文献类型：Article

语种：English

作者关键词：Mesoporous iron oxide-silica, Gold nanoparticle, Carbon monoxide, Catalytic oxidation, Indoor air purification

扩展关键词：HOLLOW MICROSPHERES; AU/CO3O4 CATALYSTS; TRACE ETHYLENE; 1,2-DICHLOROBENZENE; CO3O4

通讯作者地址：Li, Jinjun; Wuhan Univ, Sch Resources & Environm Sci, Wuhan 430079, Peoples R China.

电子邮件地址：ljjcbacademy@163.com

地址：

[Zhang, Weidong; Lu, Xiaofei; Zhou, Weili; Wu, Feng; Li, Jinjun]Wuhan Univ, Sch Resources & Environm Sci, Wuhan 430079, Peoples R China.

研究方向：Science & Technology - Other Topics

ISSN：1001-6538

eISSN：1861-9541