Shape control of CeO2 nano-particles and synthesis of nano-metric solid acid SO42-/CeO2

被引：21

作者：

Gao, JZ ^{[1
]}

Qi, YL ^{[1
]}

Yang, W ^{[1
]}

Guo, XJ ^{[1
]}

Li, SY ^{[1
]}

Li, X ^{[1
]}

机构：

[1] Northwest Normal Univ, Chem & Chem Engn Coll, Lanzhou 730070, Peoples R China

来源：

MATERIALS CHEMISTRY AND PHYSICS | 2003年 / 82卷 / 03期

基金：

中国国家自然科学基金;

关键词：

auto-combustion; sol-gel; shape control; size control and solid acid;

D O I：

10.1016/S0254-0584(03)00320-1

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Nano-particles of CeO2 with the smallest average particle size (18.7 nm) and spherical morphology were obtained from a mixture solution of Ce(NO3)(3).6H(2)O, citric acid, polyvinyl alcohol by an auto-combustion process exploiting sol-gel as precursors. The course of size control and shape control by polyvinyl alcohol was examined in detail. A transmission electron microscopy (TEM) and an atomic force microscopy (AFM) were employed to characterize the particle-size and morphology of CeO2 particles. In addition, a sort of nano-metric solid acid SO42-/CeO2 based on CeO2 nano-particles was prepared by macerating, filtering, drying and calcining processes. The particle-size of SO42-/CeO2 was also assessed by TEM. The composition of SO42-/CeO2 was analyzed by X-ray diffraction (XRD) and infrared spectra (IR). The influencing factors in the formation of SO42-/CeO2 were examined in the reaction of isobutyl alcohol and acetic acid. The relationship between the catalytic activity and the adsorption amount of SO42- groups was examined by precipitation titration. (C) 2003 Elsevier B.V. All rights reserved.

引用

页码：602 / 607

页数：6

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