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Photocatalytic activity of TiO2 doped with boron and vanadium
被引:170
作者:
Bettinelli, M.
Dallacasa, V.
Falcomer, D.
Fornasiero, P.
Gombac, V.
Montini, T.
Romano, L.
Speghini, A.
机构:
[1] Univ Verona, Dipartimento Sci & Tecnol, I-37134 Verona, Italy
[2] INSTM, UdR Verona, I-37134 Verona, Italy
[3] Univ Verona, Lab Mat Anal, Dipartimento Sci & Tecnol, I-37134 Verona, Italy
[4] Univ Trieste, CENMAT, Dipartimento Sci Chim, I-34127 Trieste, Italy
[5] INSTM, UdR Trieste, I-34127 Trieste, Italy
[6] Univ Parma, Dipartimento Fis, I-43100 Parma, Italy
关键词:
TiO2;
doping;
methylene blue photodegradation;
boron;
vanadium;
ANATASE TIO2;
PHASE-TRANSFORMATION;
AMORPHOUS TITANIA;
METHYLENE-BLUE;
CODOPED TIO2;
CARBON;
DEGRADATION;
NITROGEN;
RUTILE;
BROOKITE;
D O I:
10.1016/j.jhazmat.2007.04.053
中图分类号:
X [环境科学、安全科学];
学科分类号:
08 ;
0830 ;
摘要:
Boron (B)- and vanadium (V)-doped TiO2 photocatalysts were synthesized using modified sol-gel reaction processes and characterized by X-ray diffraction (XRD), Raman spectroscopy and N-2 physisorption (BET). The photocatalytic activities were evaluated by monitoring the degradation of methylene blue (MB). The results showed that the materials possess high surface area. The addition of B favored the transformation of anatase to rutile, while in the presence of V, anatase was the only phase detected. The MB degradation on V-doped TiO2 was significantly affected by the preparation method. In fact while the presence of V in the bulk did not influence strongly the photoreactivity under visible irradiation, an increase of surface V doping lead to improved photodegradation of MB. The degradation of MB dye indicated that the photocatalytic activities of TiO2 increased as the boron doping increased, with high conversion efficiency for 9 mol% B doping. (c) 2007 Elsevier B.V. All rights reserved.
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页码:529 / 534
页数:6
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