Synthesis of mesoporous ceria/titania thin films for self-cleaning applications

被引：35

作者：

Ismail, Adel A. ^{[1
,2
]}

Bouzid, Houcine ^{[1
,3
]}

机构：

[1] Najran Univ, Ctr Adv Mat & Nanores CAMNR, Promising Ctr Sensors & Elect Devices PCSED, Najran 11001, Saudi Arabia

[2] CMRDI, Nanostruct & Nanotechnol Mat Div, Adv Mat Dept, Cairo 11421, Egypt

[3] Najran Univ, Dept Phys, Fac Sci & Arts, Najran 11001, Saudi Arabia

来源：

JOURNAL OF COLLOID AND INTERFACE SCIENCE | 2013年 / 404卷

关键词：

Mesoporous; CeO2/TiO2; Thin films; Photocatalyst; Self-cleaning; PHOTOCATALYTIC ACTIVITY; TITANIA FILMS; TIO2; FILMS; CERIA; DEGRADATION; NANOPARTICLES; RADICALS;

D O I：

10.1016/j.jcis.2013.04.032

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：

CeO2/TiO2 thin films with a three-dimensional (3D) cubic structure were synthesized. Firstly, mesostructured 3D TiO2 films with high surface area and thermally stable have been prepared. Secondly, CeO2 was deposited on 3D mesoporous TiO2 film by two pathways: (i) cerium nitrate sol in presence of poly(ethylene glycol) was deposited on the prepared mesoporous TiO2 films by spin-coating to obtain 1, 3, and 5 layers CeO2/TiO2 and (ii) the second pathway, for thick CeO2, the prepared mesoporous TiO2 films were suspended into the high concentration of cerium nitrate in presence of poly(ethylene glycol) for 24 h with magnetic stirring. FE-SEM images of the mesoporous CeO2/TiO2 films were crack-free and indicated a random worm-like network of the mesopores. The XRD patterns show for all prepared samples only TiO2 anatase phase. At five layers CeO2/TiO2, a weak and diffuse diffraction peak arises, corresponding to (111) plane of cubic CeO2. Methylene blue degradation was conducted to characterize the photocatalytic activity of films and compared with that of commercially available Pilkington Activ (TM) glass by the determination of their photonic efficiencies. Photonic efficiency of mesoporous TiO2 similar to 3.39% is higher than Pilkington Activ (TM) glass similar to 10 times, probably due to the much larger surface area of the mesoporous films and its high crystallinity. Five layers CeO2/TiO2 films showed two times higher photoactivity for MB oxidation than mesoporous TiO2 film, and its photonic efficiency was found to be similar to 20 times higher than Pilkington Activ (TM) glass. Five layers CeO2/TiO2 was fixed after being used repetitively for five times. (c) 2013 Elsevier Inc. All rights reserved.

引用

页码：127 / 134

页数：8

共 41 条

[1] Improving the Photocatalytic Performance of Mesoporous Titania Films by Modification with Gold Nanostructures [J].

Bannat, Inga ;

Wessels, Katrin ;

Oekermann, Torsten ;

Rathousky, Jiri ;

Bahnemann, Detlef ;

Wark, Michael .

CHEMISTRY OF MATERIALS, 2009, 21 (08) :1645-1653

[2] Photocatalytic activity of titania modified mesoporous silica for pollution control [J].

Belhekar, AA ;

Awate, SV ;

Anand, R .

CATALYSIS COMMUNICATIONS, 2002, 3 (10) :453-458

[3] Photocatalytic activities of Pd-loaded mesoporous TiO2 thin films [J].

Chan, Chih-Chieh ;

Chang, Chung-Chieh ;

Hsu, Wen-Chia ;

Wang, Shih-Kai ;

Lin, Jerry .

CHEMICAL ENGINEERING JOURNAL, 2009, 152 (2-3) :492-497

[4] Microstructure characterization and photocatalytic activity of mesoporous TiO2 films with ultrafine anatase nanocrystallites [J].

Chen, Yongjun ;

Stathatos, Elias ;

Dionysiou, Dionysios D. .

SURFACE & COATINGS TECHNOLOGY, 2008, 202 (10) :1944-1950

[5] 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

[6]

Fallah J.E., 1995, ELECT SPECTROSC RELA, V73, P89

[7] Spectroscopic studies of interfacial structures of CeO2-TiO2 mixed oxides [J].

Fang, Jun ;

Bi, Xinzhen ;

Si, Dejun ;

Jiang, Zhiquan ;

Huang, Weixin .

APPLIED SURFACE SCIENCE, 2007, 253 (22) :8952-8961

[8] Highly Active Crystalline Mesoporous TiO2 Films Coated onto Polycarbonate Substrates for Self-Cleaning Applications [J].

Fateh, Razan ;

Ismail, Adel A. ;

Dillert, Ralf ;

Bahnemann, Detlef W. .

JOURNAL OF PHYSICAL CHEMISTRY C, 2011, 115 (21) :10405-10411

[9] Degradation of the herbicide 2,4-dichlorophenoxyacetic acid over TiO2-CeO2 sol-gel photocatalysts: Effect of the annealing temperature on the photoactivity [J].

Galindo-Hernandez, Felix ;

Gomez, Ricardo .

JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY, 2011, 217 (2-3) :383-388

[10] Photoelectrocatalytic activity of mesoporous TiO2 thin film electrodes [J].

Gan, Wee Yong ;

Zhao, Huijun ;

Amal, Rose .

APPLIED CATALYSIS A-GENERAL, 2009, 354 (1-2) :8-16

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