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2012 , Vol. 70 >Issue 05: 572 - 578

DOI: https://doi.org/10.6023/A1106122

研究论文

TeO2-SiO2/α-TeO2 复合薄膜的电化学-溶胶凝胶制备及非线性光学性能

  • 李强 ,
  • 辜敏 ,
  • 杜云贵 ,
  • 鲜晓东
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  • a 复杂煤气层瓦斯抽采国家与地方联合工程实验室 重庆大学煤矿灾害动力学与控制国家重点实验室 重庆大学资源及环境科学学院 重庆 400044;
    b 重庆大学自动化学院 重庆 400044

收稿日期: 2011-06-12

  修回日期: 2011-10-10

  网络出版日期: 2011-11-23

基金资助

重庆市科委自然科学基金(No. 2008BC4003)、厦门大学固体表面物理化学国家重点实验室开放课题(No. 200703)资助项目.

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TeO2-SiO2/α-TeO2 Composite Film Prepared by Electrochemical sol-gel Method and Its Non-linear Optical Properties

  • Li Qiang ,
  • Gu Min ,
  • Du Yungui ,
  • Xian Xiaodong
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  • a State and local Joint Engineering Laboratory of Methane Drainage in Complex Coal Gas Seam, State Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, College of Resources and Environmental Science, Chongqing University, Chongqing 400044;
    b College of Automatization, Chongqing University, Chongqing 400044

Received date: 2011-06-12

  Revised date: 2011-10-10

  Online published: 2011-11-23

Supported by

This work was supported by the Natural Science Foundation Project of CQ CSTC (No. 2008BC4003) and the State Key Laboratory for Physical Chemistry of Solid Surfaces of Xiamen University (No. 200703).

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摘要

以异丙醇碲和正硅酸乙酯作为前驱体, 配制了稳定的TeO2-SiO2 复合溶胶; 以之为电解液采用电化学-溶胶凝胶法制备了黑色的凝胶薄膜, 将薄膜经热处理后得到灰白色半透明的复合薄膜. 分别采用XRD 和SEM-EDX 研究复合薄膜的晶体结构、表面形貌及其组成, 结果表明凝胶薄膜的主要成分为Si, Te, O 元素, 黑色的凝胶薄膜为TeO2-SiO2/Te,灰白色半透明的复合薄膜为少量Te 的SiO2-TeO2/α-TeO2; α-TeO2 颗粒和少量Te 颗粒均匀分散在TeO2-SiO2 凝胶复合薄膜中. 采用Z-scan 方法测试薄膜的光学性能, 结果表明其三阶非线性极化率χ(3) 为2.171×10-14 (m·V-1)2.

关键词： 碲; TeO2-SiO2; 电化学-溶胶凝胶法; 薄膜; 非线性光学

本文引用格式

李强 , 辜敏 , 杜云贵 , 鲜晓东 . TeO2-SiO2/α-TeO2 复合薄膜的电化学-溶胶凝胶制备及非线性光学性能[J]. 化学学报, 2012 , 70(05) : 572 -578 . DOI: 10.6023/A1106122

Abstract

Stable TeO2-SiO2 composite sol was prepared by using tellurium isopropoxide and tetraethoxysilane as precursors. A black composite film was prepared by electrochemical sol-gel method using the as-prepared TeO2-SiO2 composite sol as electrolyte, and then was transferred into a gray and semitransparent composite film by further thermo treatment. Characterized by XRD, TG-DTA and SEM-EDX, the thin composite film was identified to be composed of Si, Te and O elements as the main components, and α-TeO2 particles and a small amount of Te particles were found to be dispersed uniformly in the TeO2-SiO2 gel composite film. The third-order nonlinear optical properties of the film was tested by Z-scan method, revealing that the third-order nonlinear optical susceptibility χ(3) was 2.171×10-14 (m·V-1)2.

Key words： tellurium; TeO2-SiO2; electrochemistry-sol-gel method; film; nonlinear optics

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