纳米管钛酸的ESR特性及其可见光照的影响

doi:10.7517/j.issn.1674-0475.2003.04.273

影像科学与光化学 ›› 2003, Vol. 21 ›› Issue (4): 273-279.DOI: 10.7517/j.issn.1674-0475.2003.04.273

纳米管钛酸的ESR特性及其可见光照的影响

李伟, 金振声, 杨建军, 张治军

河南大学, 特种功能材料省重点实验室, 开封, 475001

收稿日期:2003-05-05 修回日期:2003-05-14 出版日期:2003-07-23 发布日期:2003-07-23
通讯作者: 金振声;张治军
基金资助:
国家自然科学基金(20071010);河南省自然科学基金(211020500)

INFLUENCE OF VACUUM DEHYDRATION AND VISIBLE LIGHT IRRADIATION ON ESR PROPERTY OF NANOTUBE TITANIC ACID

LI Wei, JIN Zhen-sheng, YANG Jian-jun, ZHANG Zhi-jun

Lab of Special Functional Materials, Henan University, Kaifeng 475001, P.R. China

Received:2003-05-05 Revised:2003-05-14 Online:2003-07-23 Published:2003-07-23

摘要/Abstract

摘要： 本文报道了纳米管钛酸在真空-0.1MPa、温度100℃的条件下,经过不同时间处理后的ESR特性及其可见光照的影响.发现纳米管钛酸经一定处理后,不经光照即出现g=2.003ESR信号,该信号是由捕获一个电子的氧空位(V_o)产生的,此信号随着处理时间的延长而增强;在532nm的可见光照射下,随着光照时间的延长信号强度随之增加,达到一定强度值后,不再随光照时间的延长而增加;光源关闭后,信号强度又逐渐减小,但不能恢复到原来信号强度的水平.

关键词: 纳米管钛酸, 电子自旋共振谱(ESR), 氧空位

Abstract: The influence of vacuum dehydration and visible light irradiation on ESR property of nanotube titanic acid was studied.A symmetrical ESR signal appeared at g=2.003 in dark,which was assigned to be single-electron-trapped oxygen vacancy.The signal intensity increased with both treatment time and visible light irradiation time(λ=532 nm).Under irradiation the signal intensity increased,till a steady state reached.After turning off the irradiation,the signal intensity decreased in dark but it cannot return to its initial value.

Key words: nanotube titanic acid, ESR, oxygen vacancy

中图分类号:

李伟, 金振声, 杨建军, 张治军. 纳米管钛酸的ESR特性及其可见光照的影响[J]. 影像科学与光化学, 2003, 21(4): 273-279.

LI Wei, JIN Zhen-sheng, YANG Jian-jun, ZHANG Zhi-jun. INFLUENCE OF VACUUM DEHYDRATION AND VISIBLE LIGHT IRRADIATION ON ESR PROPERTY OF NANOTUBE TITANIC ACID[J]. Imaging Science and Photochemistry, 2003, 21(4): 273-279.

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纳米管钛酸的ESR特性及其可见光照的影响

INFLUENCE OF VACUUM DEHYDRATION AND VISIBLE LIGHT IRRADIATION ON ESR PROPERTY OF NANOTUBE TITANIC ACID

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