Hydrothermal synthesis and ethanol sensing properties of CeVO4 and CeVO4-CeO2 powders

被引：40

作者：

Chen, LM ^{[1
]}

机构：

[1] Cent S Univ, Coll Chem & Chem Engn, Changsha 410083, Peoples R China

来源：

MATERIALS LETTERS | 2006年 / 60卷 / 15期

关键词：

nanomaterials; crystal growth; sensors; HETEROJUNCTION; NANOWIRES; SENSORS; FILMS; RAMAN; ZN; SN; FE; CO;

D O I：

10.1016/j.matlet.2005.12.037

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

CeVO4 powders with different morphologies were synthesized in basic media by surfactant-free hydrothermal process. The products were characterized by X-ray diffraction and transmission electron microscopy (TEM). From the experimental results, it has been revealed that there is an optimal pH range (pH <= 12.0) for the fort-nation of pure CeV04 and the pH plays a key role in the formation of the products of different morphologies and sizes. Increasing pH from 9 to 10 causes the morphology transformation: irregular nanoparticles-nanorods. High pH (12.0 < pH < 14.0) resulted in the formation of CeVO4-CeO2 compounds. Gas sensing behavior of CeVO4 and CeVO4-CeO2 based materials to ethanol were firstly studied. The sensors based on these materials show different response to ethanol, wherein the response is the best when using CeVO4-CeO2 compounds as material. (c) 2005 Elsevier B.V. All rights reserved.

引用

页码：1859 / 1862

页数：4

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