Influence of activated carbon upon titania on aqueous photocatalytic consecutive runs of phenol photodegradation

被引:130
作者
Matos, J.
Laine, J.
Herrmann, J. -M.
Uzcategui, D.
Brito, J. L.
机构
[1] Inst Venezolano Invest Cient, Ctr Quim, Lab Fisicoquim Superficies, Caracas 1020A, Venezuela
[2] Univ Lyon 1, Lab Applicat Chim Environm, F-69622 Villeurbanne, France
关键词
phenol; total organic carbon; photodegradation; titania; activated carbon; kinetics; synergy;
D O I
10.1016/j.apcatb.2005.10.040
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
The photocatalytic degradation of phenol was performed at room temperature in aqueous suspended mixtures of TiO(2) and activated carbon (AC). The main objective of the present work was to verify the potential of TiO(2)/AC system in the photocatalytic degradation of phenol and the principal intermediate products after performing three consecutive runs. The phenol disappearance follows a first-order kinetics. Therefore, the apparent first-order rate constant of phenol and total organic carbon photodegradations were selected to evaluate the photoefficiency of the system. From the present results it can be concluded that there is a synergistic effect between both solids which is determined by the numbers of photocatalytic runs. From a practical point of view, TiO(2)/AC is able to photomineralize phenol and total organic carbon for three and two, respectively, consecutive runs more efficiently than TiO(2) alone. (c) 2006 Elsevier B.V. All rights reserved.
引用
收藏
页码:461 / 469
页数:9
相关论文
共 27 条
[1]   FTIR study of gas-phase alcohols photocatalytic degradation with TiO2 and AC-TiO2 [J].
Araña, J ;
Doña-Rodríguez, JM ;
Cabo, CGI ;
González-Díaz, O ;
Herrera-Melián, JA ;
Pérez-Peña, J .
APPLIED CATALYSIS B-ENVIRONMENTAL, 2004, 53 (04) :221-232
[2]   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
[3]   TiO2 activation by using activated carbon as a support -: Part I.: Surface characterisation and decantability 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) :161-172
[4]  
BAHNEMANN D, 1994, AQUATIC AND SURFACE PHOTOCHEMISTRY, P261
[5]  
Blake D.M., 1997, NRELTP43022197
[6]   Preparation and characterization of TiO2 photocatalysts supported on various rigid supports (glass, quartz and stainless steel). Comparative studies of photocatalytic activity in water purification [J].
Fernandez, A ;
Lassaletta, G ;
Jimenez, VM ;
Justo, A ;
GonzalezElipe, AR ;
Herrmann, JM ;
Tahiri, H ;
AitIchou, Y .
APPLIED CATALYSIS B-ENVIRONMENTAL, 1995, 7 (1-2) :49-63
[7]   Heterogeneous photocatalysis: State of the art and present applications [J].
Herrmann, JM .
TOPICS IN CATALYSIS, 2005, 34 (1-4) :49-65
[8]   HETEROGENEOUS PHOTOCATALYSIS - AN EMERGING TECHNOLOGY FOR WATER-TREATMENT [J].
HERRMANN, JM ;
GUILLARD, C ;
PICHAT, P .
CATALYSIS TODAY, 1993, 17 (1-2) :7-20
[9]   EFFECT OF CHROMIUM DOPING ON THE ELECTRICAL AND CATALYTIC PROPERTIES OF POWDER TITANIA UNDER UV AND VISIBLE ILLUMINATION [J].
HERRMANN, JM ;
DISDIER, J ;
PICHAT, P .
CHEMICAL PHYSICS LETTERS, 1984, 108 (06) :618-622
[10]  
IBUSUKI T, 1993, TR MET ENV, V3, P375