Photoinduced electron transfer from anatase to rutile in partially reduced TiO2 (P-25) nanoparticles:: An ESR study
Photoinduced electron transfer from anatase to rutile in partially reduced TiO2 (P-25) nanoparticles:: An ESR study
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DOI：
10.1016/j.cplett.2006.07.003
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发表时间：
2006-09-20
影响因子：
2.8
通讯作者：
Harima, Yutaka
中科院分区：
文献类型：
--
作者：
Komaguchi, Kenji;Nakano, Haruka;Harima, Yutaka
通过原位 ESR 光谱研究了部分还原的 TiO2 纳米颗粒中俘获电子 (Ti3+) 的光效应。对于纯相样品，在能量低于带隙的照射下，Ti3+光谱强度下降；然而，初始 ESR 信号在 77 K 的黑暗中 30 分钟内恢复。对于 TiO2 (P-25) 颗粒，ESR 线形状发生显着变化，但恢复后信号的积分强度保持不变。研究发现，俘获的电子可以通过光激发从TiO2（P-25）中的锐钛矿相转移到金红石相。 (c) 2006 Elsevier B.V. 保留所有权利。
The photoeffects of trapped electrons (Ti3+) in partially reduced TiO2 nanoparticles were studied by in situ ESR spectroscopy. For the pure phase samples, upon illumination with an energy lower than the band gap, the Ti3+ spectra decreased in intensity; however, the initial ESR signal was restored within 30 min in the dark at 77 K. For the TiO2 (P-25) particles, the ESR line shape changed significantly with being constant in the integrated intensity of the signal after the restoration. It was found that the trapped electrons can transfer from the anatase phase to the rutile phase in TiO2 (P-25) by photoexcitation. (c) 2006 Elsevier B.V. All rights reserved.