Ultraviolet absorption spectra of amphoteric SnO2 nanocrystallites

被引：34

作者：

Kang, JY

Tsunekawa, S ^{[1
]}

Kasuya, A

机构：

[1] Tohoku Univ, Inst Mat Res, Sendai, Miyagi 9808577, Japan

[2] Xiamen Univ, Dept Phys, Xiamen 361005, Peoples R China

[3] Tohoku Univ, Interdisciplinary Res Ctr, Sendai, Miyagi 9808578, Japan

来源：

APPLIED SURFACE SCIENCE | 2001年 / 174卷 / 3-4期

基金：

中国国家自然科学基金;

关键词：

stannic oxide; aqueous sol; amphoteric oxide; blue shift; energy band gap; ultra-filtration; X-ray powder diffraction;

D O I：

10.1016/S0169-4332(01)00184-2

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Aqueous sols having SnO2 nanocrystalline particles less than 2 nm in mean diameter were prepared by ultra-filtration from original acidic and alkaline sols with particle diameters extending over a wide range of 0.5-8 nm. Blue shifts were observed in ultraviolet absorption spectra of both the sols. The relationship between energy band gap and size distribution in the original and ultra-filtrated sols suggests that the blue shifts depend on not only the particle size but also the chemical state of nanoparticle surfaces in the acidic and alkaline sols. (C) 2001 Elsevier Science B.V. All rights reserved.

引用

页码：306 / 309

页数：4

共 22 条

[1] Grain size effects on H-2 gas sensitivity of thick film resistor using SnO2 nanoparticles [J].