| 纳米管钛酸的ESR特性及其可见光照的影响 |
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| 引用本文： | 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. |
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| 作者姓名： | 李伟 金振声 杨建军 张治军 |
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| 作者单位： | 河南大学, 特种功能材料省重点实验室, 开封, 475001 |
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| 基金项目： | 国家自然科学基金，河南省自然科学基金 |
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| 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(Vo)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.
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| 关 键 词： | 纳米管钛酸 电子自旋共振谱(ESR) 氧空位 |
| 收稿时间： | 2003-05-05 |
INFLUENCE OF VACUUM DEHYDRATION AND VISIBLE LIGHT IRRADIATION ON ESR PROPERTY OF NANOTUBE TITANIC ACID |
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| 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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| Authors: | LI Wei JIN Zhen-sheng YANG Jian-jun ZHANG Zhi-jun |
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| Institution: | Lab of Special Functional Materials, Henan University, Kaifeng 475001, P.R. China |
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| 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. |
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| Keywords: | nanotube titanic acid ESR oxygen vacancy |
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