Surface chemical composition of MV10Mo2O31•nH2O (M= Na2, K2, Ca, Sr, Cu) xerogels

被引：8

作者：

Bondarenka, V

Grebinskij, S

Kaciulis, S

Mattogno, G

Mickevicius, S

机构：

[1] CNR, Inst Mat Chem, I-00016 Monterotondo Scalo, Italy

[2] Inst Semicond Phys, LT-2600 Vilnius, Lithuania

来源：

JOURNAL OF ELECTRON SPECTROSCOPY AND RELATED PHENOMENA | 2000年 / 107卷 / 03期

关键词：

xerogel; XPS; TDS; poly-vanadium-molybdenum acid;

D O I：

10.1016/S0368-2048(00)00152-3

中图分类号：

O433 [光谱学];

学科分类号：

0703 ; 070302 ;

摘要：

X-ray photoelectron spectroscopy and thermal desorption spectrometry was used to study the chemical composition of the MV10Mo2O31. nH(2)O (M=Na-2, K-2, Ca, Sr, Cu) xerogels. The binding energy, FWHM and shape of the main XPS peaks were analysed. The valency of the vanadium ions was studied. The concentration ratio of tetra- and pentavalent vanadium ions N=V+4/(V+4+V+5), which is an important parameter, deciding the electronic part of total conductivity, was determined from the peak fitting of the V 2p(3/2) line. The thermal desorption measurements were performed at the temperatures up to 550 degrees C; afterwards the samples in the dehydrated state were studied again by XPS. (C) 2000 Elsevier Science B.V. All rights reserved.

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页码：253 / 259

页数：7

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