均相沉淀法制备的纳米CeO2颗粒的结构表征

华南理工大学学报(自然科学版) ›› 2004, Vol. 32 ›› Issue (4): 52-56.

均相沉淀法制备的纳米CeO₂颗粒的结构表征

袁文辉毕怀庆韦朝海

华南理工大学化学工程研究所广东广州510640

收稿日期:2003-05-09 出版日期:2004-04-20 发布日期:2015-09-08
通信作者: 袁文辉（1969－）男副研究员博士主要从事化工吸附和环境工程研究． E-mail:cewhyuan＠scut.edu.cn
作者简介:袁文辉（1969－）男副研究员博士主要从事化工吸附和环境工程研究．
基金资助:
国家自然科学基金资助项目（5027803620277010）

Structure Characterization of Nanosized Cerium Oxide Particles Prepared by Homogeneous Precipitation

Yuan Wen-hui Bi Huai-qing Wei Chao-hai

Research Institute of Chemical EngineeringSouth China Univ．of Tech．Guangzhou510640GuangdongChina

Received:2003-05-09 Online:2004-04-20 Published:2015-09-08
Contact: uan Wen-hui （born in1969）maleassocia-teprofessorPh．D．mainly researches on chemical engineeringadsorption and environmental engineering． E-mail:cewhyuan＠scut.edu.cn
About author:uan Wen-hui （born in1969）maleassocia-teprofessorPh．D．mainly researches on chemical engineeringadsorption and environmental engineering．
Supported by:
Supported by the National Natural Science Foundation of China （5027803620277010）

摘要/Abstract

摘要： 采用均相沉淀法以 Ce（NO 3 ） 4 为起始原料制得了一种具萤石立方相结构、BET 比表面积为101m2／g的 CeO 2 超细颗粒．同时采用 XRD、DSC／TGA、TEM 和 BET 表面测定法对样品性能进行了表征．XRD 结果表明所制得的颗粒具有较大的晶格参数说明颗粒较小；DSC／TGA 测试结果表明所制备的颗粒失重为16．84％由此可推断CeO 2 化合物的分子式为CeO 2 ·2H 2 O；从TEM测试结果来看均相沉淀法制备的CeO 2 颗粒平均直径为10nm颗粒为球状．将所制得的 CeO 2 颗粒用来制备溶胶其最大质量浓度可达170g／L稳定期可达4周以上且无任何沉淀．

关键词: 纳米颗粒, 氧化铈, 结构表征, 均相沉淀

Abstract: A novel synthesis method based on homogeneous precipitation using cerium （Ⅳ） nitrate as the starting material was developed to prepare ultrafine cerium oxide particles．Properties of the obtained samples were characterized by XRDDSC／TGATEM and BET area measurements．A structure of fluorite cubic phase of the prepared samples with a BET specific surface area of101m
2 ／g was obtained．XRD results show that the prepared particles are of a large lattice parameterwhich indicates that the particles are very small．Moreoverthe DSC／TGA measurement results show that the weight loss of the particles is about 16．84％manifesting that the molecularformula of cerium oxide compound is CeO 2 ·2H 2 O．It is also indicated by TEM that the particles obtained by the
homogeneous precipitate method are spherica- l likewith an average particle size of about10nm．The sols obtained from CeO 2 particles are of the highest CeO 2 mass concentration of more than170g／L and are stable for more than four weeks without any precipitation．

Key words: nanosized particle, cerium oxide, structure characterization, homogeneous precipitation

中图分类号:

O643.32

袁文辉毕怀庆韦朝海. 均相沉淀法制备的纳米CeO₂颗粒的结构表征[J]. 华南理工大学学报(自然科学版), 2004, 32(4): 52-56.

Yuan Wen-hui Bi Huai-qing Wei Chao-hai. Structure Characterization of Nanosized Cerium Oxide Particles Prepared by Homogeneous Precipitation[J]. Journal of South China University of Technology(Natural Science Edition), 2004, 32(4): 52-56.

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均相沉淀法制备的纳米CeO₂颗粒的结构表征

Structure Characterization of Nanosized Cerium Oxide Particles Prepared by Homogeneous Precipitation

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