RELATION BETWEEN PHOTOADSORPTION OF OXYGEN AND NUMBER OF HYDROXYL-GROUPS ON A TITANIUM-DIOXIDE SURFACE
RELATION BETWEEN PHOTOADSORPTION OF OXYGEN AND NUMBER OF HYDROXYL-GROUPS ON A TITANIUM-DIOXIDE SURFACE
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DOI：
10.1021/j100583a017
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发表时间：
1975-01-01
影响因子：
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通讯作者：
MUTSAERS, CAHA
中科院分区：
文献类型：
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作者：
BOONSTRA, AH;MUTSAERS, CAHA
研究了近紫外光照射下氧在T1O2表面的吸附程度。氧的吸附强烈地依赖于样品的放气温度。用二甲基锌法测定了在不同温度下放气后表面残留的羟基数目。结合这些实验的结果，我们发现氧的吸附量与表面上剩余的羟基数目之间存在线性关系。除了放出样品的气体，羟基的数量也通过化学吸附HCl而改变。由于这种化学吸附，氧在T1O2上的光吸附也减少了。从实验中我们发现，锐钛矿修饰比金红石对氧的吸附更敏感。
A study has been made of the extent to which oxygen is adsorbed on the surface of T1O2 under illumination in the near-uv. The oxygen adsorption depends strongly on the outgassing temperature of the sample. The number of hydroxyl groups remaining on the surface after outgassing at different temperatures was determined by means of dimethylzinc. Combining the results of these experiments we found a linear relation be-tween the amount of oxygen adsorption and the number of hydroxyl groups remaining on the surface. Apart from outgassing the samples, the number of hydroxyl groups was also changed by chemisorption of HC1. As a result of this chemisorption the photoadsorption of oxygen on T1O2 alsodecreased. From our ex-periments we found that the anatase modification is more photosensitive to oxygen adsorption than the ru-tile.