Dispersion of Rare-earth Chloride in NaY Zeolite Studied by Positron Annihilation Spectroscopy

Acta Chimica Sinica ›› 2004, Vol. 62 ›› Issue (11): 1024-1028. Previous Articles Next Articles

用正电子湮没谱学研究氯化稀土在NaY沸石上的分散

朱俊¹, 马莉¹, 王少阶¹, 罗锡辉²

1. 武汉大学物理系, 武汉, 430072;
2. 抚顺石油化工研究院, 抚顺, 113001

投稿日期:2003-07-11 修回日期:2004-02-16 发布日期:2014-02-17
通讯作者: 朱俊,E-mail:zhuj@whu.edu.cn E-mail:zhuj@whu.edu.cn
基金资助:
湖北省自然科学基金(No.2001s2071)及吉林大学无机合成与制备化学国家重点实验室资助项目.

Dispersion of Rare-earth Chloride in NaY Zeolite Studied by Positron Annihilation Spectroscopy

ZHU Jun¹, MA Li¹, WANG Shao-Jie¹, LUO Xi-Hui²

1. Department of Physics, Wuhan University, Wuhan 430072;
2. Fushun Research Institute of Petroleum and Petrochemicals, Fushun 113001

Received:2003-07-11 Revised:2004-02-16 Published:2014-02-17

Abstract

A series of samples of rare-earth NaY zeolite (RE NaY), prepared from mechanical mixtures of rare-earth chloride with NaY zeolite, were studied by positron annihilation spectroscopy. We measured the positron lifetime spectra as a function of the rare-earth chloride content in the RE-NaY heated at 500℃ for 1 h, as a function of the heating temperature with heating time of 1 h, and as a function of the heating time at 500℃ for RE NaY (5%), respectively. All lifetime spectra were resolved into five components, in which the third, the fourth and the fifth components are related to the ortho-positronium annihilation in sodalite cage, supercage and interface void, respectively. The experimental results showed that positron annihilation spectroscopy was sensitive to the change of the dispersion of rare-earth in NaY zeolite.

Key words: positron annihilation spectroscopy, rare-earth, zeolite

Cite this article

ZHU Jun, MA Li, WANG Shao-Jie, LUO Xi-Hui. Dispersion of Rare-earth Chloride in NaY Zeolite Studied by Positron Annihilation Spectroscopy[J]. Acta Chimica Sinica, 2004, 62(11): 1024-1028.

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用正电子湮没谱学研究氯化稀土在NaY沸石上的分散

Dispersion of Rare-earth Chloride in NaY Zeolite Studied by Positron Annihilation Spectroscopy

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