Role of water adsorption in photoinduced superhydrophilicity on TiO2 thin films

被引：27
作者：
Lee, Fuk Kay [1 ]
Andreatta, Gaelle [1 ]
Benattar, Jean-Jacques [1 ]
机构：
[1] CEA Saclay, Serv Phys Etat Condense, CNRS,DRECAM, URA 2464,DSM, F-91191 Gif Sur Yvette, France
来源：
APPLIED PHYSICS LETTERS | 2007年 / 90卷 / 18期
关键词：
D O I：
10.1063/1.2737132
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
The ultraviolet (UV) irradiation of a titanium dioxide (TiO2) film surface gives rise to two simultaneous phenomena: photocatalysis and superhydrophilicity. Photocatalysis has been thoroughly studied, but the mechanism governing superhydrophilicity remains controversial. The authors' investigations show the effects induced by UV irradiation on the water adsorption and desorption on the TiO2 surface. The observations prove that superhydrophilicity cannot be solely induced by the removal of organic contamination via photocatalysis, but is associated with water adsorption most probably due to the appearance of hydroxyl groups on surface defects. (C) 2007 American Institute of Physics.
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共 28 条
[1]   STRUCTURAL-PROPERTIES OF SOAP BLACK FILMS INVESTIGATED BY X-RAY REFLECTIVITY [J].
BELORGEY, O ;
BENATTAR, JJ .
PHYSICAL REVIEW LETTERS, 1991, 66 (03) :313-316
[2]   Adhesion of a free-standing Newton black film onto a solid substrate [J].
Benattar, JJ ;
Nedyalkov, M ;
Lee, FK ;
Tsui, OKC .
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION, 2006, 45 (25) :4186-4188
[3]   Modification of black film hydration by infrared irradiation [J].
Benattar, JJ ;
Shen, Q ;
Bratskaya, S ;
Petkova, V ;
Krafft, MP ;
Pucci, B .
LANGMUIR, 2004, 20 (04) :1047-1050
[4]   Insertion process of a protein single layer within a Newton black film [J].
Benattar, JJ ;
Nedyalkov, M ;
Prost, J ;
Tiss, A ;
Verger, R ;
Guilbert, C .
PHYSICAL REVIEW LETTERS, 1999, 82 (26) :5297-5300
[5]   Direct visualization of defect-mediated dissociation of water on TiO2(110) [J].
Bikondoa, O ;
Pang, CL ;
Ithnin, R ;
Muryn, CA ;
Onishi, H ;
Thornton, G .
NATURE MATERIALS, 2006, 5 (03) :189-192
[6]   Self-cleaning surfaces - virtual realities [J].
Blossey, R .
NATURE MATERIALS, 2003, 2 (05) :301-306
[7]   Imaging water dissociation on TiO2(110) -: art. no. 266103 [J].
Brookes, IM ;
Muryn, CA ;
Thornton, G .
PHYSICAL REVIEW LETTERS, 2001, 87 (26) :266103-1
[8]   Biomimetic titanium dioxide film with structural color and extremely stable hydrophilicity [J].
Gu, ZZ ;
Fujishima, A ;
Sato, O .
APPLIED PHYSICS LETTERS, 2004, 85 (21) :5067-5069
[9]   ENVIRONMENTAL APPLICATIONS OF SEMICONDUCTOR PHOTOCATALYSIS [J].
HOFFMANN, MR ;
MARTIN, ST ;
CHOI, WY ;
BAHNEMANN, DW .
CHEMICAL REVIEWS, 1995, 95 (01) :69-96
[10]   Thermally- and photoinduced changes in the water wettability of low-surface-area silica and titania [J].
Kanta, A ;
Sedev, R ;
Ralston, J .
LANGMUIR, 2005, 21 (06) :2400-2407
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