Infrared absorption on hydrogen in anatase TiO2
Infrared absorption on hydrogen in anatase TiO2
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锐钛矿型 TiO2 中氢的红外吸收
DOI：
10.1002/pssa.201431814
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发表时间：
2015
期刊：
影响因子：
--
通讯作者：
E. Lavrov
中科院分区：
文献类型：
--
作者：
E. Lavrov
对天然单晶锐钛矿型二氧化钛的红外吸收进行了研究。结果表明，样品在3357.8、3359.3、3372.5和3389.3 cm−1处均有吸收峰，氢化温度为450 °C时，吸收峰强度增大。此外，氢化还导致在3412.4和3416.9 cm−1处出现两条吸收峰。同位素替代实验表明，这6条吸收峰都是由于O-H键的伸展局域振动模式所致，它们优先平行于TiO2c轴。在3357.8、3359.3、3372.5和3389.3 cm−1处的LVM群保持相同的相对强度，并且在450 °C以下的热处理下是稳定的，而负责3412.4和3416.9 cm−1线的氢相关复合体(ES)在250 °C下热处理后消失(S)。
IR absorption study of natural single‐crystalline anatase TiO2 has been performed. It was found that as‐received material reveals absorption lines at 3357.8, 3359.3, 3372.5, and 3389.3 cm−1, whose intensity grows if the sample is hydrogenated from the H2 ambient at 450 °C. In addition, hydrogenation results in the appearance of two lines at 3412.4 and 3416.9 cm−1. Isotope substitution experiments have shown that all six lines are due to the stretch local vibrational modes (LVMs) of O–H bonds, which are preferentially aligned parallel to the c‐axis of TiO2. The group of LVMs at 3357.8, 3359.3, 3372.5, and 3389.3 cm−1 retains the same relative intensities and is stable against thermal treatments up to 450 °C, whereas the hydrogen‐related complex(es) responsible for the 3412.4 and 3416.9 cm−1 lines disappear(s) after annealing at 250 °C. The nature of the defects resulting in these vibrational modes is discussed.
ZnO 和金红石中氢供体光电导光谱中的法诺共振
影响因子：
1.9
作者：
E. Lavrov;F. Herklotz;J. Weber
通讯作者：
J. Weber
影响因子：
4.6
作者：
Sezen H;Buchholz M;Nefedov A;Natzeck C;Heissler S;Di Valentin C;Wöll C
通讯作者：
Wöll C