Photoinduced hydrophilic conversion properties of titania nanosheets

被引：64

作者：

Sakai, N ^{[1
]}

Fukuda, K ^{[1
]}

Shibata, T ^{[1
]}

Ebina, Y ^{[1
]}

Takada, K ^{[1
]}

Sasaki, T ^{[1
]}

机构：

[1] Natl Inst Mat Sci, Adv Mat Lab, Tsukuba, Ibaraki 3050044, Japan

来源：

JOURNAL OF PHYSICAL CHEMISTRY B | 2006年 / 110卷 / 12期

关键词：

D O I：

10.1021/jp0556916

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

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 hiah concentration of photoexcited carriers. As the number of layers of titania nanosheets increased, the dependence behavior changed from k proportional to I1-0 to k proportional to 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.

引用

页码：6198 / 6203

页数：6

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