X-ray induced photoelectrochemistry on TiO2
X-ray induced photoelectrochemistry on TiO2
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DOI：
10.1016/j.electacta.2007.05.011
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发表时间：
2007-08
影响因子：
6.6
通讯作者：
K. Tamura;Y. Ohko;H. Kawamura;H. Yoshikawa;T. Tatsuma;A. Fujishima;J. Mizuki
中科院分区：
文献类型：
--
作者：
K. Tamura;Y. Ohko;H. Kawamura;H. Yoshikawa;T. Tatsuma;A. Fujishima;J. Mizuki
研究了X射线照射下TiO2的电化学行为。在 X 射线照射下，可以清楚地观察到电流、静止电位的负移以及 [FeII(CN)6]4− 的电化学氧化和分解。入射光子-电流转换效率和能量转换效率分别为 400-2000% 和 0.2-2%，具体取决于样品条件。这些结果表明，X射线以高入射光子-电流转换效率促进了光电化学反应。在4.965keV以上观察到光电流和光势，对应于Ti-K边缘，表明电子-空穴对是在激发的Ti原子的弛豫过程中形成的。
The electrochemical behaviour of TiO2under X-ray irradiation was studied. Under X-ray irradiation a current, a negative shift in the rest potential, and electrochemical oxidation and decomposition of [FeII(CN)6]4−were clearly observed. The incident photon-current conversion efficiency and energy conversion efficiency was 400–2000% and 0.2–2%, respectively, depending on sample conditions. These results show that the photoelectrochemical reactions were promoted by X-rays with a high incident photon-current conversion efficiency. The photocurrent and photopotential were observed above 4.965keV, which corresponds to the Ti–K edge, indicating that electron-hole pairs are formed during the relaxation process of the excited Ti atoms.