Effect of Vanadia Doping and Its Oxidation State on the Photocatalytic Activity of TiO2 for Gas-Phase Oxidation of Ethene

被引：104

作者：

Bhattacharyya, K. ^{[1
]}

Varma, S. ^{[1
]}

Tripathi, A. K. ^{[1
]}

Bharadwaj, S. R. ^{[1
]}

Tyagi, A. K. ^{[1
]}

机构：

[1] Bhabha Atom Res Ctr, Div Chem, Bombay 400085, Maharashtra, India

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2008年 / 112卷 / 48期

关键词：

D O I：

10.1021/jp807860y

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：

Single phasic anatase titania with up to 10 mol % vanadium doping, having a particle size of about 12 rim, was synthesized by a sol-gel route and its photocatalytic behavior evaluated for the photo-oxidation of ethene using sunlight-type excitation. Incorporation of vanadia in the titania lattice was established using techniques like XRD, XPS, surface area analysis, TEM, DR-UV-visible spectroscopy, Raman spectroscopy, and FTIR. Vanadium doping led to a red shift in the UV-visible absorbance spectra compared to pristine titania, thus enhancing the absorption in the visible region. Synthesized nanotitania and vanadia-doped titania exhibit enhanced photocatalytic activity compared to the commercial bulk anatase TiO2, with maximum activity obtained for the 5 mol % vanadium-doped titania sample, which was attributed to an optimum concentration of V4+ and V5+ species. The role of these species in enhancement of catalytic activity and reaction mechanism has been discussed.

引用

页码：19102 / 19112

页数：11

共 43 条

[1] The design and development of highly reactive titanium oxide photocatalysts operating under visible light irradiation [J].

Anpo, M ;

Takeuchi, M .

JOURNAL OF CATALYSIS, 2003, 216 (1-2) :505-516

[2] Design of unique titanium oxide photocatalysts by an advanced metal ion-implantation method and photocatalytic reactions under visible light irradiation [J].

Anpo, M ;

Ichihashi, Y ;

Takeuchi, M ;

Yamashita, H .

RESEARCH ON CHEMICAL INTERMEDIATES, 1998, 24 (02) :143-149

[3] Visible-light photocatalysis in nitrogen-doped titanium oxides [J].

Asahi, R ;

Morikawa, T ;

Ohwaki, T ;

Aoki, K ;

Taga, Y .

SCIENCE, 2001, 293 (5528) :269-271

[4] Vapor-phase photo-oxidation of methanol over nano-size titanium dioxide clusters dispersed in MCM-41 host material part 2: Catalytic properties and surface transient species [J].

Bhattacharyya, K ;

Varma, S ;

Kumar, D ;

Tripathi, AK ;

Gupta, NM .

JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY, 2005, 5 (05) :797-805

[5] USE OF X-RAY PHOTOELECTRON SPECTROSCOPY TO STUDY BONDING IN CR, MN, FE, AND CO COMPOUNDS [J].

CARVER, JC ;

CARLSON, TA ;

SCHWEITZER, GK .

JOURNAL OF CHEMICAL PHYSICS, 1972, 57 (02) :973-+

[6] INSITU LASER RAMAN-SPECTROSCOPY OF SUPPORTED METAL-OXIDES [J].

CHAN, SS ;

WACHS, IE ;

MURRELL, LL ;

WANG, L ;

HALL, WK .

JOURNAL OF PHYSICAL CHEMISTRY, 1984, 88 (24) :5831-5835

[7] THE ROLE OF METAL-ION DOPANTS IN QUANTUM-SIZED TIO2 - CORRELATION BETWEEN PHOTOREACTIVITY AND CHARGE-CARRIER RECOMBINATION DYNAMICS [J].

CHOI, WY ;

TERMIN, A ;

HOFFMANN, MR .

JOURNAL OF PHYSICAL CHEMISTRY, 1994, 98 (51) :13669-13679

[8] EFFECTS OF METAL-ION DOPANTS ON THE PHOTOCATALYTIC REACTIVITY OF QUANTUM-SIZED TIO2 PARTICLES [J].

CHOI, WY ;

TERMIN, A ;

HOFFMANN, MR .

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION IN ENGLISH, 1994, 33 (10) :1091-1092

[9] BONDING STATES OF SURFACE VANADIUM(V) OXIDE PHASES ON SILICA - STRUCTURAL CHARACTERIZATION BY V-51 NMR AND RAMAN-SPECTROSCOPY [J].

DAS, N ;

ECKERT, H ;

HU, HC ;

WACHS, IE ;

WALZER, JF ;

FEHER, FJ .

JOURNAL OF PHYSICAL CHEMISTRY, 1993, 97 (31) :8240-8243

[10] Continuous-mode photocatalytic degradation of chlorinated phenols and pesticides in water using a bench-scale TiO2 rotating disk reactor [J].

Dionysiou, D ;

Khodadoust, AP ;

Kern, AM ;

Suidan, MT ;

Baudin, I ;

Laîné, JM .

APPLIED CATALYSIS B-ENVIRONMENTAL, 2000, 24 (3-4) :139-155

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