Synthesis, characterization and photocatalytic activity of different metal-doped titania systems

被引：264

作者：

Colmenares, J. C. ^{[1
]}

Aramendia, M. A. ^{[1
]}

Marinas, A. ^{[1
]}

Marinas, J. M. ^{[1
]}

Urbano, F. J. ^{[1
]}

机构：

[1] Univ Cordoba, Dept Organ Chem, E-14014 Cordoba, Spain

来源：

APPLIED CATALYSIS A-GENERAL | 2006年 / 306卷 / 120-127期

关键词：

photocatalysis; selective photooxidation; titania-based catalysts; metal-doped catalysts; sonication; isopropanol; sol-gel synthesis;

D O I：

10.1016/j.apcata.2006.03.046

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：

Different titania-based systems doped with diverse transition metals (Ag, Fe, Pd, Pt, Zn and Zr) were synthesized by the sol-gel method. Samples were characterized by a wide range of physical techniques (ICP-MS, N-2-isotherms, TGA-DTA, TEM, XRD, FF-Raman and UV-vis spectroscopies). The effect of aging of the gel either under magnetic stirring (ST) or ultrasonic irradiation (US) on the characteristics of the resulting solids was studied. Sonication ensured the obtention of pure anatase nanoparticles and generally led to an increase in surface area. All the solids were tested for gas phase selective photooxidation of 2-propanol. Irrespective of the aging method, doping with Pd, Pt or Ag resulted in an increase in molar conversion as compared to bare-TiO2, whereas the presence of Fe and Zr had a detrimental effect. Those solids for which sonication had the greatest impact on textural and structural characteristics (bare-TiO2 and Zn-containing samples) exhibited the greatest difference in molar conversion. Moreover, high selectivities to acetone were achieved in most of the cases. (c) 2006 Elsevier B.V. All rights reserved.

引用

页码：120 / 127

页数：8

共 39 条

[1] Photocatalytic degradation of herbicide fluroxypyr in aqueous suspension of TiO2
Aramendía, MA
Marinas, A
Marinas, JM
Moreno, JM
Urbano, FJ
[J]. CATALYSIS TODAY, 2005, 101 (3-4) : 187 - 193
[2] Gas-phase ethanol photocatalytic degradation study with TiO2 doped with Fe, Pd and Cu
Araña, J
Doña-Rodríguez, JM
González-Díaz, O
Rendón, ET
Melián, JAH
Colón, G
Navío, JA
Peña, JP
[J]. JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL, 2004, 215 (1-2) : 153 - 160
[3] Solubility of platinum in aqueous solutions at 25°C and pHs 4 to 10 under oxidizing conditions
Azaroual, M
Romand, B
Freyssinet, P
Disnar, JR
[J]. GEOCHIMICA ET COSMOCHIMICA ACTA, 2001, 65 (24) : 4453 - 4466
[4] Adsorption of gases in multimolecular layers
Brunauer, S
Emmett, PH
Teller, E
[J]. JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1938, 60 : 309 - 319
[5] Photoinduced reactivity of titanium dioxide
Carp, O
Huisman, CL
Reller, A
[J]. PROGRESS IN SOLID STATE CHEMISTRY, 2004, 32 (1-2) : 33 - 177
[6] Characteristics of photocatalytic oxidation of gaseous 2-propanol using thin-film TiO2 photocatalyst
Chang, CP
Chen, JN
Lu, MC
[J]. JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY, 2004, 79 (11) : 1293 - 1300
[7] deBoer J.H., 1958, STRUCTURE PROPERTIES
[8] Solar efficiency of a new deposited titania photocatalyst: chlorophenol, pesticide and dye removal applications
Guillard, C
Disdier, J
Monnet, C
Dussaud, J
Malato, S
Blanco, J
Maldonado, MI
Herrmann, JM
[J]. APPLIED CATALYSIS B-ENVIRONMENTAL, 2003, 46 (02) : 319 - 332
[9] Role of Co-W interaction in the selective growth of single-walled carbon nanotubes from CO disproportionation
Herrera, JE
Resasco, DE
[J]. JOURNAL OF PHYSICAL CHEMISTRY B, 2003, 107 (16) : 3738 - 3746
[10] Characterization and photocatalytic activity of noble-metal-supported surface TiO2/SiO2
Hu, C
Tang, YH
Jiang, Z
Hao, ZP
Tang, HX
Wong, PK
[J]. APPLIED CATALYSIS A-GENERAL, 2003, 253 (02) : 389 - 396

← 1 2 3 4 →