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Eosin Y-sensitized nitrogen-doped TiO2 for efficient visible light photocatalytic hydrogen evolution
- Source :
-
Journal of Molecular Catalysis A: Chemistry . Mar2008, Vol. 282 Issue 1/2, p117-123. 7p. - Publication Year :
- 2008
-
Abstract
- Abstract: A nitrogen-doped TiO2 (N-TiO2) photocatalyst was prepared by the calcination of the hydrolysis product of Ti(SO4)2 with aqueous ammonia. Pt was loaded on N-TiO2 by photodeposition method. A dye-sensitization photocatalyst was prepared by impregnation method with Eosin Y and the platinized N-TiO2. The prepared samples were characterized by XRD, UV–vis diffuse reflectance spectra (DRS), BET and FT-IR. The visible light activity of the sensitization photocatalysts was evaluated by photocatalytic hydrogen evolution (λ >420nm) in the presence of electron donor triethanolamine (TEOA). The N-TiO2 has smaller crystalline size and larger specific surface area to enhance the adsorption amount of Eosin Y than TiO2 prepared by NaOH. Surface oxygen defects produced by nitrogen doping would improve the adsorption of Eosin Y and excited electron to transfer to the conduction band of N-TiO2. Therefore the visible light activity of the sensitized nitrogen-doped platinized TiO2 is much higher than that of the sensitized platinized TiO2. The sensitized nitrogen-doped platinized TiO2 calcined at 300°C has the highest visible light activity among the catalysts calcined at various temperatures, whose activity is increased by a factor of 3 compared to that of the sensitized platinized TiO2 calcined at the same temperature. [Copyright &y& Elsevier]
- Subjects :
- *EOSIN
*NITROGEN
*TITANIUM dioxide
*PHOTOCATALYSIS
Subjects
Details
- Language :
- English
- ISSN :
- 13811169
- Volume :
- 282
- Issue :
- 1/2
- Database :
- Academic Search Index
- Journal :
- Journal of Molecular Catalysis A: Chemistry
- Publication Type :
- Academic Journal
- Accession number :
- 30873051
- Full Text :
- https://doi.org/10.1016/j.molcata.2007.12.005