标题：Gold catalysts supported on nanosized iron oxide for low-temperature oxidation of carbon monoxide and formaldehyde作者：Tang, Zheng; Zhang, Weidong; Li, Yi; Huang, Zuming; Guo, Huishan; Wu,Feng; Li, Jinjun

来源出版物：APPLIED SURFACE SCIENCE 卷：364 页码：75-80 DOI: 10.1016/j.apsusc.2015.12.112 出版年：FEB 28 2016

摘要：This study aimed to optimize synthesis of gold catalyst supported on nanosized iron oxide and to evaluate the activity in oxidation of carbon monoxide and formaldehyde. Nanosized iron oxide was prepared from a colloidal dispersion of hydrous iron oxide through a dispersion-precipitation method. Gold was adsorbed onto nanosized iron oxide under self-generated basic conditions. Characterization results indicate that the iron oxide consisted of hematite/maghemite composite with primary particle sizes of 6-8 nm. Gold was highly dispersed on the surface of the support. The catalysts showed good activity in the oxidation of airborne carbon monoxide and formaldehyde. The optimal pH for their synthesis was similar to 7. The catalytic performance could be enhanced by extending the adsorption time of gold species on the support within 21 h. The optimized catalyst was capable of achieving complete oxidation of 1% carbon monoxide at -20 degrees C and 33% conversion of 450 ppm formaldehyde at ambient temperature. The catalyst may be applicable to indoor air purification.

入藏号：WOS:000369957800011

文献类型：Article

语种：English

作者关键词：Iron oxide nanoparticle, Gold catalyst, Catalytic oxidation, Carbon monoxide, Formaldehyde

扩展关键词：VOLATILE ORGANIC-COMPOUNDS; CO OXIDATION; AU/TIO2 CATALYSTS; SELECTIVE OXIDATION; ALLOY NANOPARTICLES; 1,2-DICHLOROBENZENE; METHANOL; WATER; PARTICLES; HYDROGEN

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

电子邮件地址：ljjcbacademy@163.com

地址： [Tang, Zheng; Zhang, Weidong; Li, Yi; Huang, Zuming; Guo, Huishan; Wu, Feng; Li, Jinjun] Wuhan Univ, Sch Resources & Environm Sci, Wuhan 430079, Peoples R China.

研究方向：Chemistry; Materials Science; Physics

ISSN：0169-4332

eISSN: 1873-5584

影响因子（2014）：2.711