Sivaranjani, Kumarsrinivasan and Gopinath, Chinnakonda S. (2011) Porosity driven photocatalytic activity of wormhole mesoporous TiO2-xNx in direct sunlight. Journal of Materials Chemistry, 21. pp. 2639-2647.

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Results obtained by combining four important factors simultaneously, namely, wormhole mesoporosity with low diffusion length for charge carriers, high surface area, nanoparticle with high crystallinity, and visible light absorption due to N-doping, in titania (meso TiO2-xNx) is reported. Meso TiO2-xNx materials has been prepared by combustion method within 10 min. and by varying urea:Ti(NO3)4 between 1 (UT1) and 10 (UT10). All of the prepared materials have been thoroughly characterised. Nanocrystalline anatase phase with high surface area (234 m2/g), and type-IV H3-mesoporosity is observed with UT10. Photocatalytic rhodamine-B degradation was employed to screen for the activity of the materials, and p-anisyl alcohol oxidation to p-anisaldehyde was carried out successfully in aqueous solution under direct sunlight. High photocatalytic activity of UT10 in direct sunlight, in spite of high band gap (3.24 eV), is attributed to the better utilization of holes due to the low charge diffusion barrier associated with wormhole mesoporosity along with highly crystalline, however, nanoparticulate TiO2-xNx.

Item Type: Article
Subjects: Catalysis and Surface Science
Materials Chemistry
Depositing User: Mr Edwin Gnanakumar
Date Deposited: 24 Mar 2014 11:15
Last Modified: 24 Mar 2014 11:15

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