How room-humidity during the coating affects the structural, optical and photocatalytic properties of TiO2 films

被引：5

作者：

de Anda Reyes, M. E. ^{[1
]}

Torres Delgado, G. ^{[1
]}

Castanedo Perez, R. ^{[1
]}

Marquez Marin, J. ^{[1
]}

Zelaya Angel, O. ^{[2
]}

机构：

[1] Ctr Invest & Estudios Avanzados IPN, Unidad Queretaro, Queretaro 76001, Qro, Mexico

[2] Ctr Invest & Estudios Avanzados IPN, Dept Fis, Mexico City 07360, DF, Mexico

来源：

JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY | 2012年 / 61卷 / 02期

关键词：

TiO2; Photocatalysis; Room-humidity; Dipping; Sol-gel; Thin films; THIN-FILMS; TEMPERATURE; SILICA;

D O I：

10.1007/s10971-011-2628-z

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

TiO2 thin films were obtained on glass slide substrates by the sol-gel technique. The substrates were coated by the immersion-removal method, at a constant withdrawal speed. The TiO2 precursor solution and the substrate were maintained in a closed box with a controlled relative humidity (RH) during the removal of the substrate. The RH was varied in the 30-90% range in steps of 20%. The films were dried and after that sintered in an open atmosphere. The effect of the RH was studied on the structural, optical and photocatalytic properties. The films are polycrystalline with an anatase phase and show a high optical transmission in the UV-Vis range. The photocatalytic activity was evaluated by the photobleaching of methylene blue in an aqueous solution. The best photocatalytic activity was obtained for the films with 90% RH, this fact is mainly attributed to the highest porosity value obtained for these films.

引用

页码：310 / 315

页数：6

共 27 条

[1]

Mayén-Hernández SA, 2007, J ADV OXID TECHNOL, V10, P85

[2]

[Anonymous], SOL GEL SCI PHYS CHE

[3]

Bagheri Garmarudi A, 2010, WORLD ACAD SCI ENG T, V70, P636

[4] IR-analysis of H-bonded H2O on the pure TiO2 surface [J].

Bezrodna, T ;

Puchkovska, G ;

Shymanovska, V ;

Baran, J ;

Ratajczak, H .

JOURNAL OF MOLECULAR STRUCTURE, 2004, 700 (1-3) :175-181

[5] Synthesis and characterization of Fe-doped TiO2 photocatalyst by the sol-gel method [J].

Luu C.L. ;

Nguyen Q.T. ;

Ho S.T. .

Advances in Natural Sciences: Nanoscience and Nanotechnology, 2010, 1 (01)

[6] Effect of water on the formation of nanostructured mesoporous titania [J].

Chang, Yee Shin ;

Lee, Ying-Chieh ;

Yuhara, Junji ;

Chan, Lap Hong ;

Teoh, Lay Gaik ;

Chen, Hong Ming .

CURRENT APPLIED PHYSICS, 2011, 11 (03) :486-491

[7] Controlled formation of highly organized mesoporous titania thin films:: From mesostructured hybrids to mesoporous nanoanatase TiO2 [J].

Crepaldi, EL ;

Soler-Illia, GJDA ;

Grosso, D ;

Cagnol, F ;

Ribot, F ;

Sanchez, C .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2003, 125 (32) :9770-9786

[8] Humidity and temperature effects on CTAB-templated mesophase silicate films at the air-liquid interface [J].

Fernandez-Martin, C ;

Edler, KJ ;

Roser, SJ .

LANGMUIR, 2004, 20 (24) :10679-10684

[9] Influence of substrate and annealing temperatures on optical properties of RF-sputtered TiO2 thin films [J].

Hasan, M. M. ;

Haseeb, A. S. M. A. ;

Saidur, R. ;

Masjuki, H. H. ;

Hamdi, M. .

OPTICAL MATERIALS, 2010, 32 (06) :690-695

[10] TiO2 photocatalysis:: A historical overview and future prospects [J].

Hashimoto, K ;

Irie, H ;

Fujishima, A .

JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS BRIEF COMMUNICATIONS & REVIEW PAPERS, 2005, 44 (12) :8269-8285

← 1 2 3 →