Photocatalysis on TiO2 Surfaces Investigated by Atomic Force Microscopy: Photodegradation of Partial and Full Monolayers of Stearic Acid on TiO2(110)
Photocatalysis on TiO2 Surfaces Investigated by Atomic Force Microscopy: Photodegradation of Partial and Full Monolayers of Stearic Acid on TiO2(110)
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原子力显微镜研究 TiO2 表面光催化作用：TiO2(110) 上部分和全部硬脂酸单层的光降解
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发表时间：
1999
期刊：
影响因子：
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通讯作者：
K. Hashimoto
中科院分区：
文献类型：
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作者：
P. Sawunyama;A. Fujishima;K. Hashimoto
我们研究了硬脂酸LB膜在TiO2（110）表面光降解的性质和表面形态变化。有趣的是，硬脂酸的亚单分子膜由各种尺寸的圆形域组成，这是一个非常有吸引力的功能，用于通过AFM监测TiO2纳米粒子。我们注意到，有没有散装差分反应在岛屿边缘相比，内部。这表明硬脂酸分子的光降解速率与它们在岛中的位置无关。因此，对于部分膜和完整膜两者，整体表面反应性趋势是相似的。同样，观察到的不均匀反应模式似乎是反应中心的瞬态分布的反映。
We have studied the nature and surface morphological changes associated with the photodegradation of stearic acid LB films on TiO2(110). Interestingly, submonolayers of stearic acid consisted of circular domains of various sizesa feature very attractive for monitoring TiO2 photocatalysis by AFM. We noted that there was no bulk differential reactivity at island edges compared to the interior. This suggests that the rate of photodegradation of the stearic acid molecules is independent of their location in the island. Accordingly, the overall surface reactivity trends were similar for both partial films and complete films. Likewise, the observed inhomogeneous reactivity patterns appear to be a reflection of the transient distribution of the reaction centers.