Preparation and characterization of nanocrystal V2O5

被引：18

作者：

Zheng, CM ^{[1
]}

Zhang, XM

Qiao, ZP

Lei, DM

机构：

[1] Zhongshan Univ, Sch Chem & Chem Engn, Guangzhou 510275, Peoples R China

[2] Zhongshan Univ, Dept Phys, Guangzhou 510275, Peoples R China

来源：

JOURNAL OF SOLID STATE CHEMISTRY | 2001年 / 159卷 / 01期

关键词：

nanocrystal vanadium pentoxide; preparation; crystallization and melting point; IR spectra; size effect;

D O I：

10.1006/jssc.2001.9148

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Nanocrystal V2O5 with granular shape and of various sizes was prepared by oxidative pyrolysis of the single molecular precursor, (NH4)(5)[(VO)(6)(CO3)(4)(OH)(9)]. 10H(2)O, at less than or equal to 630 degreesC in a flow of air or oxygen gas. The thermolysis process of the precursor was investigated by TGA/DTGA and DTA in a flow of air. The data of the DTA curve indicate that fine particles of V2O5 are easier to crystallize and have a lower melting point. The IR spectra of various size V2O5 show that the absorption wavenumbers of the bands decreased gradually and the absorption at 494 similar to 518 cm(-1) disappeared gradually as the powder sizes decreased, which is attributed to size effect. (C) 2001 Academic Press.

引用

页码：181 / 185

页数：5

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