Superhydrophilic TiO2 surfaces generated by reactive oxygen treatment

被引：13

作者：

Ishida, Nobuyuki ^{[1
]}

Fujita, Daisuke ^{[1
,2
]}

机构：

[1] Natl Inst Mat Sci, Global Res Ctr Environm & Energy Based Nanomat Sc, Tsukuba, Ibaraki 3050047, Japan

[2] Natl Inst Mat Sci, Adv Nanocharacterizat Unit, Tsukuba, Ibaraki 3050047, Japan

来源：

JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A | 2012年 / 30卷 / 05期

关键词：

WETTABILITY CONVERSION; THIN-FILMS; HYDROPHILICITY; IMPROVEMENT; WATER;

D O I：

10.1116/1.4736946

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The authors show that superhydrophilic TiO2 can be obtained without irradiation of the surface with ultraviolet (UV) light and concomitant excitation of electron-hole pairs. The authors demonstrate that the treatment of TiO2 surfaces with reactive oxygen species generated by air plasma removes the surface organic contaminants, leading to almost 0 degrees contact-angle wetting of the surface. The superhydrophilicity can be explained by the positive spreading coefficient calculated using the effective surface tensions. Our results point toward UV-light irradiation as an indirect cause of the superhydrophilicity of TiO2 and support the hypothesis that this property arises from a self-cleaning effect based on the photo-oxidation and decomposition of organic contaminants at the surface. (C) 2012 American Vacuum Society. [http://dx.doi.org/10.1116/1.4736946]

引用

页数：5

共 25 条

[1] Modeling the morphology and phase stability of TiO2 nanocrystals in water [J].

Barnard, AS ;

Zapol, P ;

Curtiss, LA .

JOURNAL OF CHEMICAL THEORY AND COMPUTATION, 2005, 1 (01) :107-116

[2] The cleanability of stainless steel as determined by X-ray photoelectron spectroscopy [J].

Boyd, RD ;

Verran, J ;

Hall, KE ;

Underhill, C ;

Hibbert, S ;

West, R .

APPLIED SURFACE SCIENCE, 2001, 172 (1-2) :135-143

[3]

Fujishima A., 2008, SURF SCI REP, V369, P63

[4] SURFACE PRECIPITATION PROCESS OF EPITAXIALLY GROWN GRAPHITE (0001) LAYERS ON CARBON-DOPED NICKEL(111) SURFACE [J].

FUJITA, D ;

YOSHIHARA, K .

JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A-VACUUM SURFACES AND FILMS, 1994, 12 (04) :2134-2139

[5]

Gennes P., 2003, CAPILLARITY WETTING, DOI [DOI 10.1007/978-0-387-21656-0, 10.1007/978-0-387-21656-0]

[6] Effect of plasma treatment on hydrophilic properties of TiO2 thin films [J].

Han, JB ;

Wang, X ;

Wang, N ;

Wei, ZH ;

Yu, GP ;

Zhou, ZG ;

Wang, QQ .

SURFACE & COATINGS TECHNOLOGY, 2006, 200 (16-17) :4876-4878

[7]

Israelachvili J., 1991, Intermolecular and Surface Forces

[8] Plasma surface modification of TiO2 photocatalysts for improvement of catalytic efficiency [J].

Jung, CK ;

Bae, IS ;

Song, YH ;

Boo, JH .

SURFACE & COATINGS TECHNOLOGY, 2005, 200 (5-6) :1320-1324

[9] Synthesis of TiO2 photocatalyst and study on their improvement technology of photocatalytic activity [J].

Jung, CK ;

Bae, IS ;

Song, YH ;

Kim, TK ;

Vlcek, J ;

Musil, J ;

Boo, JH .

SURFACE & COATINGS TECHNOLOGY, 2005, 200 (1-4) :534-538

[10] Photoinduced surface reactions on TiO2 and SrTiO3 films:: Photocatalytic oxidation and photoinduced hydrophilicity [J].

Miyauchi, M ;

Nakajima, A ;

Fujishima, A ;

Hashimoto, K ;

Watanabe, T .

CHEMISTRY OF MATERIALS, 2000, 12 (01) :3-+

← 1 2 3 →