化工进展

• 材料科学与技术 • 上一篇    下一篇

纳米二氧化铈的制备及光催化性能

耿九光,臧文杰,李毅,陶建强   

  1. 长安大学材料科学与工程学院,陕西 西安 710064
  • 出版日期:2014-03-05 发布日期:2014-03-05

Preparation and photocatalytic performance of nano-ceria

GENG Jiuguang,ZANG Wenjie,LI Yi,TAO Jianqiang   

  1. School of Materials Science and Engineering,Chang’an University,Xi’an 710064,Shaanxi,China
  • Online:2014-03-05 Published:2014-03-05

摘要: 介绍了一种以双氧水氧化硝酸铈[Ce(NO3)3],并用氨水沉淀制备纳米二氧化铈粉末(CeO2)的方法,用扫描电镜(SEM)观察了产物的颗粒形貌和粒度,分析了其制备过程中影响微观形态的因素。通过尾气降解试验装置研究了纳米CeO2对汽车尾气中的有害气体(HC、NOx)的光催化降解效能。结果表明:当Ce(NO3)3浓度为2.0 mol/L,氨水浓度为1.0 mol/L,选用乙醇和乙二醇为分散剂时,制备的球形纳米CeO2粒度在50 nm左右且分散性良好,对HC、NOx气体降解率可分别达12%和90%,具有良好的光催化性能。

关键词: 纳米材料, 二氧化铈, 氧化-沉淀法, 光催化, 尾气降解

Abstract: A facile route for the synthesis of nano cerium oxide powder (CeO2) is provided by the oxidation of cerium nitrate [Ce(NO3)3] with hydrogen peroxide and precipitation with ammonia. Factors influencing the size and morphology of the particle are analyzed. And the product is observed with a scanning electron microscope (SEM). Exhaust degradation test device is designed to study the photocatalytic properties of nano-CeO2 in the degradation of harmful gases within the automobile exhaust (HC and NOx). The results indicate that the ammonia concentration is 1.0 mol/L,with ethanol and ethylene glycol as dispersant,when the Ce(NO3)3 concentration is 2.0 mol/L,and the as-prepared nano-CeO2 is sphere-like nanoparticle aggregates with diameters around 50 nm and of good dispersibility,with which the degradation of HC and NOx amounts of 11% and 90% respectively,showing a good photocatalytic performance.

Key words: nanomaterial, ceria, oxidation-precipitation method, photocatalysis, exhaust degradation

京ICP备12046843号-2;京公网安备 11010102001994号
版权所有 © 《化工进展》编辑部
地址:北京市东城区青年湖南街13号 邮编:100011
电子信箱:hgjz@cip.com.cn
本系统由北京玛格泰克科技发展有限公司设计开发 技术支持:support@magtech.com.cn