单双室电解法合成纳米CeO2粉体及其表征

doi:10.3724/SP.J.1077.2008.00087

无机材料学报

单双室电解法合成纳米CeO₂粉体及其表征

王涛, 孙都成

(新疆大学化学化工学院, 乌鲁木齐 830046)

收稿日期:2007-01-28 修回日期:2007-04-16 出版日期:2008-01-20 网络出版日期:2008-01-20

Preparation and Characterization of Nanometer Ceria Powder by Electrochemical Synthesis Method in a Single and Double Chamber Cells

WANG Tao, SUN Du-Cheng

(College of Chemistry and Chemical Engineering, Xin Jiang University , Urumqi 830046, China)

Received:2007-01-28 Revised:2007-04-16 Published:2008-01-20 Online:2008-01-20

摘要/Abstract

摘要： 采用直流电解合成法, 分别以CeCl₃, Ce(NO₃)₃, CeCl₃-KI溶液为电解液单室制备了纳米CeO₂粉体. 经高温焙烧后, TEM和XRD测试表明: 粒子基本呈球形, 所得产物均为立方晶系CeO₂, 粒径分别为20～50nm, 30～50nm, 20～100nm. 同时, 使用阴离子交换膜的双室电解法电解CeCl₃溶液, 发现得到的CeO₂粒径(7～20nm)比单室电解得到的小, 分析了造成粒径不同的原因. 本工作还对各溶液体系电解形成CeO₂的机理进行了分析.

关键词: 电合成, CeO₂, 单双室, 机理, 纳米

Abstract: CeCl₃, Ce(NO₃)₃ and CeCl₃-KI solutions were respectively electrolyzed at a constant current density in a single chamber cell or a double chamber cell, consequently, CeO₂ powders were produced. After they were calcined at high temperature, the size and structure of ceria were analyzed by means of TEM and XRD. The reasons of size difference of CeO₂ powders prepared in the single chamber cell or the double chamber cell were analyzed. The CeO₂ synthesis mechanisms of electrolizing all the cerium (Ⅲ)-salt solution systems were also discussed in details. The results show that the nanometer scale powders are cubic crystal group in structure and spherical in shape, and the sizes of samples prepared in the single chamber cell are 20-50nm, 30-50nm and 20-100nm, respectively. The size (7-20nm) of CeO₂ powders prepared by electrolizing CeCl₃ solution in the double chamber cell with an anion-exchange membrane is smaller than that prepared in the single chamber cell.

Key words: electrochemical synthesis, CeO₂, single and double chamber cell, mechanism study, nanometer

中图分类号:

TB383

王涛,孙都成. 单双室电解法合成纳米CeO₂粉体及其表征[J]. 无机材料学报, DOI: 10.3724/SP.J.1077.2008.00087.

WANG Tao,SUN Du-Cheng. Preparation and Characterization of Nanometer Ceria Powder by Electrochemical Synthesis Method in a Single and Double Chamber Cells[J]. Journal of Inorganic Materials, DOI: 10.3724/SP.J.1077.2008.00087.

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单双室电解法合成纳米CeO₂粉体及其表征

Preparation and Characterization of Nanometer Ceria Powder by Electrochemical Synthesis Method in a Single and Double Chamber Cells

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