Abstract
Fabrication of nitrogen-doped titania and/or strontium titanate nanoparticles via soft chemical reactions and their performance for environmental cleanup under visible light irradiation were introduced. Nitrogen-doped anatase, brookite and rutile with high specific surface area can be selectively prepared by the solvothermal reactions in mixed aqueous solution of titanium trichloride-hexamethylenetetramine. Nitrogen-doped strontium titanate can be prepared by mechanochemical reaction of strontium carbonate, titania and hexamethylenetetramine using a planetary ball-mill. Nitrogen-doped titania shows excellent photocatalytic activity for the nitrogen monoxide destruction under visible light irradiation. The photocatalytic activity of nitrogen-doped titania is in the order anatase > brookite > rutile. The photocatalytic activity of nitrogen-doped titania and strontium titanate can be improved by co-doping with higher valence metal ions to reduce oxygen vacancy and/or coupling with Fe 2O 3 and Pt to retard quick recombination of photo-induced electron and hole by the heterogeneous electron transfer.
| Original language | English |
|---|---|
| Pages (from-to) | 92-105 |
| Number of pages | 14 |
| Journal | Progress in Crystal Growth and Characterization of Materials |
| Volume | 58 |
| Issue number | 2-3 |
| DOIs | |
| Publication status | Published - 2012 Jun 1 |
Keywords
- Hydrothermal
- Low-temperature synthesis
- Mechanochemical doping
- Nitrogen-doped strontium titanate
- Nitrogen-doped titania
- Soft chemical processes
- Solvothermal
- Visible light responsive photocatalyst
- deNO
ASJC Scopus subject areas
- Materials Science(all)
- Condensed Matter Physics