Low temperature solvothermal synthesis, optical and electric properties of tetragonal phase BaTiO3 nanocrystals using BaCO3 powder

被引：20

作者：

Bai, Haixin ^{[1
]}

Liu, Xiaohua ^{[1
]}

机构：

[1] Henan Agr Univ, Coll Sci, Zhengzhou 450002, Henan, Peoples R China

来源：

MATERIALS LETTERS | 2013年 / 100卷

关键词：

Semiconductors; Nanomaterials; Optical materials and properties; Powder technology; FACILE SYNTHESIS; NANOPARTICLES;

D O I：

10.1016/j.matlet.2013.02.106

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A simple low temperature solvothermal method, which was based on the reactions of BaCO3, tetrabutyl titanate and NaOH in ethanol in an autoclave at 180 degrees C for 12 h, was proposed for the synthesis of BaTiO3. The characterization results from X-ray diffraction, Raman spectroscopy and transmission electron microscopy revealed the preparation of pure tetragonal phase BaTiO3 nanocrystals. The UV-vis diffuse reflectance spectrum indicated that the as-synthesized BaTiO3 nanocrystals had a direct band gap of about 3.42 eV. The room temperature photoluminescence spectrum of the as-synthesized BaTiO3 nanocrystals upon laser excitation at 325 nm exhibited a strong and broad emission in the wavelength range of about 480-625 nm, which may be originated from the surface states and other crystal defects. The impedance spectroscopy disclosed that the electric resistance and electric capacity of the as-synthesized BaTiO3 nanocrystals were 1.4 x 10(4) Omega and 5.7 x 10(-7) F, respectively. (C) 2013 Elsevier B.V. All rights reserved.

引用

页码：1 / 3

页数：3

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