Synthesis and visible light photocatalytic activity of transition metal oxide (V2O5) loading on TiO2 via a chemical vapor condensation method

TiO2 nanoparticles that were synthesized using a chemical vapor condensation (CVC) method were loaded on transition metal oxides (V2O5) using the impregnation method followed by thermal treatment. The primary particle size of the CVC-made TiO2 sample after vanadium was decreased drastically to 5.7nm...

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Bibliographic Details
Published in:Materials letters 2012-05, Vol.75, p.57-60
Main Authors: Chin, Sungmin, Park, Eunseuk, Kim, Minsu, Bae, Gwi-Nam, Jurng, Jongsoo
Format: Article
Language:English
Subjects:
absorption
Chemical vapor condensation
condensation
Condensing
heat treatment
Impregnation
Methylene blue
nanoparticles
Particle size
Photocatalysis
Photocatalyst
Titanium dioxide
Transition metal oxides
Transition metals
Vanadium
Vanadium pentoxide
vapors
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Summary:TiO2 nanoparticles that were synthesized using a chemical vapor condensation (CVC) method were loaded on transition metal oxides (V2O5) using the impregnation method followed by thermal treatment. The primary particle size of the CVC-made TiO2 sample after vanadium was decreased drastically to 5.7nm. The particle sizes before and after vanadium loading on the commercial TiO2 (Degussa, P25) were similar. The vanadium-loaded CVC-made TiO2 sample exhibited the best absorption performance of visible light from the absorption spectra. Moreover, the CVC method through transition metal impregnation was favorable for its enhanced photocatalytic properties. The particle size of the CVC-made TiO2 nanoparticles (CVC-TiO2) was much smaller (~10nm) than that of the P25-TiO2 sample. In particular, the resulting particle size after vanadium impregnation of the CVC-TiO2 sample was drastically reduced to 5.7nm. [Display omitted] ► Increased BET value after vanadium impregnation. ► Enhanced OH radical on V2O5/CVC-TiO2. ► For the V2O5/CVC-TiO2, an absorption edge red shift was observed with an absorption tail extending to 600nm.
ISSN:0167-577X
1873-4979
DOI:10.1016/j.matlet.2012.02.001