XPS and XANES studies of SnOx nanolayers

被引：25

作者：

Domashevskaya É.P. ^{[1
]}

Ryabtsev S.V. ^{[1
]}

Turishchev S.Yu. ^{[1
]}

Kashkarov V.M. ^{[1
]}

Yurakov Yu.A. ^{[1
]}

Chuvenkova O.A. ^{[1
]}

Shchukarev A.V. ^{[2
]}

机构：

[1] Voronezh State University, Voronezh

[2] Umea University, Umea

来源：

Journal of Structural Chemistry | 2008年 / 49卷 / Suppl 1期

基金：

俄罗斯基础研究基金会; 美国国家科学基金会;

关键词：

Nanolayers; Photoelectron spectra; Tin oxides; X-ray absorption near edge structure;

D O I：

10.1007/s10947-008-0205-2

中图分类号：

学科分类号：

摘要：

This paper presents the results of our XPS (X-ray photoelectron spectroscopy) and XANES (X-ray absorption near edge structure) studies of tin oxide nanolayers obtained by magnetron spraying of the metal and its further oxidation in air at different temperatures. It was shown that at 240°C (annealing temperature), tin monoxide was dominant in the surface layer of the samples. When the temperature was increased to 450°C, the phase composition corresponded to tin dioxide. Increased sorption ability was found for the samples oxidized at 450°C. The band structure model of SnOx nanolayers obtained by superposition of the XANES and XPS data revealed cross transitions with energy ∼3.7 eV in the presence of the SnO and SnO 2 phases. Surface doping of nanolayers with palladium gave the Pd, PdO, and PdO2 components, among which PdO was most intense. Alternate treatments with O2 and H2 gases led to the disappearance of palladium dioxide and the reduction of PdO to the Pd metal. After the volume doping of nanoplayers with palladium, the surface layer contained PdO and PdO2; the latter was represented by two types of particles with different sizes. © 2008 Pleiades Publishing, Ltd.

引用

页码：S80 / S91

页数：11

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