纳米二氧化铈的制备及光催化性能.pdf

化工进展
·720· CHEMICAL INDUSTRY AND ENGINEERING PROGRESS 2014 年第 33 卷第 3 期
研究开发

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
(长安大学材料科学与工程学院,陕西西安 710064)
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 mol/L,氨水浓度为 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
中图分类号: 文献标志码:A 文章编号:1000–6613(2014)03–0720–04
DOI:.1000-

Preparation and photocatalytic performance of nano-ceria
GENG Jiuguang,ZANG Wenjie,LI Yi,TAO Jianqiang
(School of Materials Science and Engineering,Chang’an University,Xi’an 710064,Shaanxi,China)
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 mol/L,with ethanol
and ethyl