Visible light photodegradation of phenol on MWNT-TiO2 composite catalysts prepared by a modified sol-gel method

被引：469
作者：
Wang, WD
Serp, P
Kalck, P
Faria, JL
机构：
[1] Univ Porto, Dept Engn Quim, Lab Catalise & Mat, P-4200465 Oporto, Portugal
[2] Ecole Natl Super Ingn Arts Chim & Technol, Lab Catalyse Chim Fine & Polymeres, F-31077 Toulouse, France
来源：
JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL | 2005年 / 235卷 / 1-2期
关键词：
photocatalysis phenol degradation; titanium dioxide; MWNT; composite catalysts;
D O I：
10.1016/j.molcata.2005.02.027
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：
Multi-walled carbon nanotubes (MWNT) and TiO2 composite catalysts were prepared by a modified sol-gel method. The nanoscaled composite materials were extensively characterized by TG, N-2 adsorption-desorption isotherm, XRD, SEM, EDX, TEM and UV-vis spectra. The photocatalytic degradation of phenol was performed under visible light irradiation on these catalysts, An optimum of synergetic effect on photocatalytic activity was observed for a weight ratio MWNT/TiO2 equal to 20% with an increase in the first-order rate constant by a factor of 4.1. The synergetic effect, induced by a strong interphase interaction between MWNT and TiO2, was discussed in terms of different roles played by MWNT in the composite catalysts. (c) 2005 Elsevier B.V. All rights reserved.
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收藏
页码：194 / 199
页数：6
相关论文
共 39 条
[1]   TiO2 activation by using activated carbon as a support -: Part II.: Photoreactivity and FTIR study [J].
Araña, J ;
Doña-Rodríguez, JM ;
Rendón, ET ;
Cabo, CGI ;
González-Díaz, O ;
Herrera-Melián, JA ;
Pérez-Peña, J ;
Colón, G ;
Navío, JA .
APPLIED CATALYSIS B-ENVIRONMENTAL, 2003, 44 (02) :153-160
[2]   Photocatalytic decomposition of methylene blue using nanocrystalline anatase titania prepared by ultrasonic technique [J].
Awati, PS ;
Awate, SV ;
Shah, PP ;
Ramaswamy, V .
CATALYSIS COMMUNICATIONS, 2003, 4 (08) :393-400
[3]   Synthesis and characterization of carbon nanotube-nanocrystal heterostructures [J].
Banerjee, S ;
Wong, SS .
NANO LETTERS, 2002, 2 (03) :195-200
[4]   Visible light induced photodegradation of organic pollutants on dye adsorbed TiO2 surface [J].
Chatterjee, D ;
Mahata, A .
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY, 2002, 153 (1-3) :199-204
[5]   Demineralization of organic pollutants on the dye modified TiO2 semiconductor particulate system using visible light [J].
Chatterjee, D ;
Mahata, A .
APPLIED CATALYSIS B-ENVIRONMENTAL, 2001, 33 (02) :119-125
[6]  
Chatterjee D., 2001, CATAL COMMUN, V2, P1, DOI DOI 10.1016/S1566-7367(00)00011-X
[7]   Carbon nanotubes produced by fluidized bed catalytic CVD: first approach of the process [J].
Corrias, M ;
Caussat, B ;
Ayral, A ;
Durand, J ;
Kihn, Y ;
Kalck, P ;
Serp, P .
CHEMICAL ENGINEERING SCIENCE, 2003, 58 (19) :4475-4482
[8]   Preparation of polycrystalline TiO2 photocatalysts impregnated with various transition metal ions:: Characterization and photocatalytic activity for the degradation of 4-nitrophenol [J].
Di Paola, A ;
Marcì, G ;
Palmisano, L ;
Schiavello, M ;
Uosaki, K ;
Ikeda, S ;
Ohtani, B .
JOURNAL OF PHYSICAL CHEMISTRY B, 2002, 106 (03) :637-645
[9]  
Dresselhaus M. S., 2000, CARBON FILAMENTS NAN, P11
[10]   The measure of TiO2 photocatalytic efficiency and the comparison of different photocatalytic titania [J].
Du, YK ;
Rabani, J .
JOURNAL OF PHYSICAL CHEMISTRY B, 2003, 107 (43) :11970-11978
1234