Toluene decomposition using silver vanadate/SBA-15 photocatalysts: DRIFTS study of surface chemistry and recyclability

被引：19

作者：

Chang, Wen-Sheng ^{[2
]}

Li, Yu-Chu M. ^{[3
]}

Chung, Tsair-Wang ^{[4
]}

Lin, Yung-Sen ^{[5
]}

Huang, Chao-Ming ^{[1
]}

机构：

[1] Kun Shan Univ, Dept Mat Engn, Tainan, Taiwan

[2] Ind Technol Res Inst, Green Energy & Environm Res Labs, Hsinchu, Taiwan

[3] So Taiwan Univ, Dept Mech Engn, Tainan, Taiwan

[4] Chung Yuan Christian Univ, Dept Chem Engn, R&D Ctr Membrane Technol, Tao Yuan, Taiwan

[5] Feng Chia Univ, Dept Chem Engn, Taichung 40724, Taiwan

来源：

APPLIED CATALYSIS A-GENERAL | 2011年 / 407卷 / 1-2期

关键词：

SBA-15; Visible-light-driven photocatalyst; Toluene photo-oxidation; Brensted and Lewis acids; VISIBLE-LIGHT IRRADIATION; IN-SITU DRIFT; HETEROGENEOUS PHOTOCATALYSIS; CATALYTIC-ACTIVITY; ACID CATALYSIS; TIO2; OXIDATION; DEGRADATION; PHASE; DEACTIVATION;

D O I：

10.1016/j.apcata.2011.08.043

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：

Silver vanadate (SVO) containing SBA-15 visible-light-driven photocatalyst was synthesized using the incipient wetness impregnation procedure. X-ray diffraction (XRD) results reveal that the SVO/SBA-15 powders consisted of three kinds of phase: pure Ag4V2O7 or pure alpha-Ag3VO4 or mixed phases of Ag4V2O7 and alpha-Ag3VO4. The mass spectra indicate that the main oxidation intermediate of toluene is benzaldehyde. The sample loaded with 51 wt% SVO (51SVO/SBA-15) exhibited the best photocatalytic activity. The results of two consecutive cyclic runs and regeneration indicate that the accumulation of benzaldehyde causes an irreversible deactivation of P25, but no deactivation of 51SVO/SBA-15. The enhanced photocatalytic activity of 51SVO/SBA-15 is attributed to mixed crystalline phases of Ag4V2O7 and alpha-Ag3VO4, where alpha-Ag3VO4 is the major component. In situ diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) confirms the presence of Bronsted and Lewis acids on the SVO/SBA-15 composites. A favorable crystalline phase combined with high intensities of Bronsted and Lewis acids is considered the main cause of the enhanced adsorption capacity, outstanding photoactivity, and long term stability of the SVO/SBA-15 composites. (C) 2011 Elsevier B.V. All rights reserved.

引用

页码：224 / 230

页数：7

共 26 条

[1] Steady-state surface species during toluene photocatalysis [J].

Blount, MC ;

Falconer, JL .

APPLIED CATALYSIS B-ENVIRONMENTAL, 2002, 39 (01) :39-50

[2] Photocatalytic oxidation of toluene on nanoscale TiO2 catalysts:: Studies of deactivation and regeneration [J].

Cao, LX ;

Gao, Z ;

Suib, SL ;

Obee, TN ;

Hay, SO ;

Freihaut, JD .

JOURNAL OF CATALYSIS, 2000, 196 (02) :253-261

[3] In situ DRIFTS study of the SCR reaction of NO with NH3 in the presence of O2 over lanthanide doped V2O5/Al2O3 catalysts [J].

Centeno, MA ;

Carrizosa, I ;

Odriozola, JA .

APPLIED CATALYSIS B-ENVIRONMENTAL, 1998, 19 (01) :67-73

[4] In situ DRIFT and kinetic studies of photocatalytic degradation on benzene vapor with visible-light-driven silver vanadates [J].

Chen, Lung-Chuan ;

Pan, Guan-Ting ;

Yang, Thomas C. -K. ;

Chung, Tsair-Wang ;

Huang, Chao-Ming .

JOURNAL OF HAZARDOUS MATERIALS, 2010, 178 (1-3) :644-651

[5] Direct synthesis, characterization and catalytic activity of titanium-substituted SBA-15 mesoporous molecular sieves [J].

Chen, YY ;

Huang, YL ;

Xiu, JH ;

Han, XW ;

Bao, XH .

APPLIED CATALYSIS A-GENERAL, 2004, 273 (1-2) :185-191

[6] Heterogeneous photocatalysis as an advanced oxidation process for the abatement of chlorinated, monocyclic aromatic and sulfurous volatile organic compounds in air: State of the art [J].

Demeestere, Kristof ;

Dewulf, Jo ;

Van Langenhove, Herman .

CRITICAL REVIEWS IN ENVIRONMENTAL SCIENCE AND TECHNOLOGY, 2007, 37 (06) :489-538

[7] Role of the crystallite phase of TiO2 in heterogeneous photocatalysis for phenol oxidation in water [J].

Ding, Z ;

Lu, GQ ;

Greenfield, PF .

JOURNAL OF PHYSICAL CHEMISTRY B, 2000, 104 (19) :4815-4820

[8] Effect of suspended TiO2 physicochemical characteristics on benzene derivatives photocatalytic degradation [J].

Gumy, D. ;

Giraldo, S. A. ;

Rengifo, J. ;

Pulgarin, C. .

APPLIED CATALYSIS B-ENVIRONMENTAL, 2008, 78 (1-2) :19-29

[9] Preparation of silica-modified TiO2 and application to dye-sensitized solar cells [J].

Hoshikawa, Toyohisa ;

Ikebe, Tsugio ;

Yamada, Masashi ;

Kikuchi, Ryuji ;

Eguchi, Koichi .

JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY, 2006, 184 (1-2) :78-85

[10] In situ DRIFT study of photocatalytic degradation of gaseous isopropanol over BiVO4 under indoor illumination [J].

Huang, Chao-Ming ;

Pan, Guan-Ting ;

Peng, Po-Yang ;

Yang, Thomas C. -K. .

JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL, 2010, 327 (1-2) :38-44

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