Comparison of the pure TiO2 and kaolinite/TiO2 composite as catalyst for CO2 photocatalytic reduction

被引:97
作者
Koci, K. [1 ]
Matejka, V. [1 ]
Kovar, P. [2 ]
Lacny, Z. [1 ]
Obalova, L. [1 ]
机构
[1] Tech Univ Ostrava, Ostrava, Czech Republic
[2] CTC AP As, Prerov, Czech Republic
关键词
TiO2; CO2; reduction; Photocatalysis; Kaolinite; CARBON-DIOXIDE; PARTICLE-SIZE; PHOTOREDUCTION; METHANE;
D O I
10.1016/j.cattod.2010.08.026
中图分类号
O69 [应用化学];
学科分类号
081704 ;
摘要
The kaolinite/TiO2 composite was prepared using thermal hydrolysis of kaolinite/titanyl sulphate suspension and characterized by XRFS, XRPD, SEM and N-2 physical adsorption. Its photocatalytic properties were evaluated by photocatalytic reduction of CO2 by water and compared with commercial TiO2 photocatalyst Degussa P25. Results showed that the yields of CO2 photocatalytic reduction products methane and methanol were higher over a kaolinite/TiO2 composite than over commercial TiO2 (Degussa P25) in spite of smaller proportion of TiO2 in the composite. Introducing of TiO2 nanoparticles into the kaolinite structure caused a decrease of anatase crystallite size. Kaolinite can also change acidobasic properties of catalyst surface, inhibit the recombination of electron-hole pairs and prevent the formation of TiO2 aggregates in suspension. These facts can contribute to the observed higher photocatalytic efficiency of kaolinite/TiO2 compared to the commercial TiO2 photocatalyst. (C) 2010 Elsevier B.V. All rights reserved.
引用
收藏
页码:105 / 109
页数:5
相关论文
共 23 条
[1]   Role of synthesis method and particle size of nanostructured TiO2 on its photoactivity [J].
Almquist, CB ;
Biswas, P .
JOURNAL OF CATALYSIS, 2002, 212 (02) :145-156
[2]   Synthesis and characterisation of novel titania impregnated kaolinite nano-photocatalyst [J].
Chong, Meng Nan ;
Vimonses, Vipasiri ;
Lei, Shaomin ;
Jin, Bo ;
Chow, Chris ;
Saint, Chris .
MICROPOROUS AND MESOPOROUS MATERIALS, 2009, 117 (1-2) :233-242
[3]   Photo-catalytic reduction of carbon dioxide to methane using TiO2 as suspension in water [J].
Dey, GR ;
Belapurkar, AD ;
Kishore, K .
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY, 2004, 163 (03) :503-508
[4]   Preparation and properties of TiO2/montmorillonite composites [J].
Kameshima, Yoshikazu ;
Tamura, Yoshihiro ;
Nakajima, Akira ;
Okada, Kiyoshi .
APPLIED CLAY SCIENCE, 2009, 45 (1-2) :20-23
[5]   Effect of TiO2 particle size on the photocatalytic reduction of CO2 [J].
Koci, K. ;
Obalova, L. ;
Matejova, L. ;
Placha, D. ;
Lacny, Z. ;
Jirkovsky, J. ;
Solcova, O. .
APPLIED CATALYSIS B-ENVIRONMENTAL, 2009, 89 (3-4) :494-502
[6]   Synthesis and structural and photocatalytic properties of TiO2/montmorillonite nanocomposites [J].
Kun, R ;
Mogyorósi, K ;
Dékány, I .
APPLIED CLAY SCIENCE, 2006, 32 (1-2) :99-110
[7]   Photocatalytic reduction of carbon dioxide using sol-gel derived titania-supported CoPc catalysts [J].
Liu, Shaohua ;
Zhao, Zhihuan ;
Wang, Zhizhong .
PHOTOCHEMICAL & PHOTOBIOLOGICAL SCIENCES, 2007, 6 (06) :695-700
[8]   Photoreduction of carbon dioxide with H2 and H2O over TiO2 and ZrO2 in a circulated photocatalytic reactor [J].
Lo, Cho-Ching ;
Hung, Chung-Hsuang ;
Yuan, Chung-Shin ;
Wu, Jen-Fong .
SOLAR ENERGY MATERIALS AND SOLAR CELLS, 2007, 91 (19) :1765-1774
[9]   Size effects in gas-phase photo-oxidation of trichloroethylene using nanometer-sized TiO2 catalysts [J].
Maira, AJ ;
Yeung, KL ;
Lee, CY ;
Yue, PL ;
Chan, CK .
JOURNAL OF CATALYSIS, 2000, 192 (01) :185-196
[10]   Photoreduction of CO2 to fuels under sunlight using optical-fiber reactor [J].
Nguyen, The-Vinh ;
Wu, Jeffrey C. S. .
SOLAR ENERGY MATERIALS AND SOLAR CELLS, 2008, 92 (08) :864-872