Photoinduced hydrophilic conversion properties of titania nanosheets.
Photoinduced hydrophilic conversion properties of titania nanosheets.
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DOI：
10.1021/jp0556916
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发表时间：
2006-03
期刊：
影响因子：
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通讯作者：
Nobuyuki Sakai;K. Fukuda;Tatsuo Shibata;Y. Ebina;K. Takada;T. Sasaki
中科院分区：
文献类型：
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作者：
Nobuyuki Sakai;K. Fukuda;Tatsuo Shibata;Y. Ebina;K. Takada;T. Sasaki
研究了二氧化钛纳米片的光诱导亲水转化特性。在厚度小于1 nm的二氧化钛纳米片的单层膜表面获得了高度亲水的状态。二氧化钛纳米片单分子膜的亲水转化率(K)与光照强度(I)成正比，表明即使在高浓度的光激发载流子存在的情况下，二氧化钛纳米片表面的亲水转化也是在光受限的条件下进行的。随着二氧化钛纳米片层数的增加，其依赖行为从k比例变化i(1.0)变为k比例变化i(0.5)，表明复合过程在二氧化钛纳米片多层膜中占主导地位。面内X射线衍射分析表明，在紫外光照射下，二氧化钛纳米片的结构发生了很小但可重现的变化。
Photoinduced hydrophilic conversion properties of titania nanosheets were investigated. A highly hydrophilic state was achieved on the monolayer film surface of titania nanosheets, the thickness of which is less than 1 nm. The hydrophilic conversion rate (k) for the monolayer film of titania nanosheets was proportional to the intensity (I) of irradiated light, suggesting that the hydrophilic conversion of the titania nanosheet surface proceeded under light-limited conditions even with a high concentration of photoexcited carriers. As the number of layers of titania nanosheets increased, the dependence behavior changed from k proportional, variant I(1.0) to k proportional, variant I(0.5), indicating that the recombination processes become dominant in the multilayer films of titania nanosheets. In-plane X-ray diffraction (XRD) analyses showed a very small but reproducible structural change of titania nanosheets upon UV irradiation.