AAO模板受热失重及发光机理的研究

doi:10.3724/SP.J.1077.2012.00305

无机材料学报 ›› 2012, Vol. 27 ›› Issue (3): 305-310.DOI: 10.3724/SP.J.1077.2012.00305 CSTR: 32189.14.SP.J.1077.2012.00305

AAO模板受热失重及发光机理的研究

韩玉岩¹, 曹亮¹, 徐法强¹, 千坤², 黄伟新²

(1. 中国科学技术大学国家同步辐射实验室, 核科学技术学院, 合肥230029; 2. 中国科学技术大学化学物理系, 合肥230026)

收稿日期:2011-03-02 修回日期:2011-04-12 出版日期:2012-03-20 网络出版日期:2012-02-16
作者简介:韩玉岩(1983-), 男, 博士. E-mail: hyy2007@mail.ustc.edu.cn
基金资助:
国家自然科学基金 (10975138, 10775126)

Investigations on the Thermal Weight Loss and the Photoluminescence Mechanism of AAO Template

HAN Yu-Yan¹, CAO Liang¹, XU Fa-Qiang¹, QIAN Kun², HUANG Wei-Xin²

(1. National Synchrotron Radiation Laboratory, School of Nuclear Science and Technology, University of Science and Technology of China, Hefei 230029, China; 2. Department of Chemistry and Physics, University of Science and Technology of China, Hefei 230026, China)

Received:2011-03-02 Revised:2011-04-12 Published:2012-03-20 Online:2012-02-16
About author:HAN Yu-Yan. E-mail: hyy2007@mail.ustc.edu.cn
Supported by:
National Natural Science Foundation of China (10975138, 10775126)

摘要/Abstract

摘要： 为了深入理解草酸溶液中制备的阳极氧化铝(AAO)模板受热失重以及草酸根对模板发光性能的影响, 利用程序升温脱附与质谱联用(TPD-MS)、热重分析(TGA)、差热分析(DTA)以及光致发光(PL)等技术对AAO模板进行了系统研究. 热失重分析结果表明, 当温度低于402.2℃时, 发生H₂O、CO以及CO₂分子的脱附以及掺杂草酸的分解, 其中H₂O的脱附为失重的主要原因; 在402.2~866.7℃范围内, 主要是草酸盐分解放出CO和CO₂引起失重, CO为主要产物; 碳酸盐以及残余的草酸盐的剧烈分解发生在866.7~1022.9℃范围内, 主要放出CO₂, 并且引起大量失重. 由热重结果及脱附产物中CO的摩尔比得到草酸根残余量随处理温度的变化趋势. 最后, 对模板PL强度、草酸根含量以及氧空位缺陷(F+)浓度三者随处理温度的变化趋势进行了关联, 对AAO模板发光的原因进行了分析.

关键词: 阳极氧化铝, 程序升温脱附与质谱联用, 热重分析, 差热分析, 光致发光

Abstract: In order to deeply understand the influence of oxalic impurities on the optical properties of anodic aluminum oxide (AAO), AAOs prepared in oxalic acid solution were investigated by the temperature programmed desorption combined with mass spectrograph (TPD-MS), thermogravimetric analysis (TGA), differential thermal analysis (DTA) and photoluminescence (PL) techniques. The thermal weight loss of AAOs was monitored in the temperature range between room temperature (RT) and 1200℃ and analyzed quantitatively. The analysis results indicate that the desorption of H₂O, CO and CO₂ molecules and the decomposition of oxalic acid impurity occur below 402.2℃, therein water desorption is the main reason for the weight loss. In the temperature range of 402.2-866.7℃, the incomplete decomposition of aluminum oxalate occurs and gives birth to CO and CO₂with CO as the major component. The drastic decomposition of aluminum carbonate and oxalate take place in the temperature range of 866.7-1022.9℃, CO₂is the main product. According to the TGA results and the molar ratios of CO in the desorption products, the content variation of oxalic impurities intermingled in bulk AAOs is obtained with the change of temperature. At last, the correlation of the optical property for AAOs with the concentration of oxalic impurities and oxygen vacancies (F⁺) is proposed.

Key words: AAO, TPD-MS, thermogravimetric analysis, differential thermal analysis, photoluminescence

中图分类号:

O734

韩玉岩, 曹亮, 徐法强, 千坤, 黄伟. AAO模板受热失重及发光机理的研究[J]. 无机材料学报, 2012, 27(3): 305-310.

HAN Yu-Yan, CAO Liang, XU Fa-Qiang, QIAN Kun, HUANG Wei-Xin. Investigations on the Thermal Weight Loss and the Photoluminescence Mechanism of AAO Template[J]. Journal of Inorganic Materials, 2012, 27(3): 305-310.

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AAO模板受热失重及发光机理的研究

Investigations on the Thermal Weight Loss and the Photoluminescence Mechanism of AAO Template

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