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Hybrid Sol-Gel Combustion Synthesis of Nanoporous Anatase

Mukherjee, B and Karthik, C and Ravishankar, N (2009) Hybrid Sol-Gel Combustion Synthesis of Nanoporous Anatase. In: Journal Of Physical Chemistry C, 113 (42). pp. 18204-18211.

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Official URL: http://pubs.acs.org/doi/abs/10.1021/jp904563m


Nanoporous anatase with a thin interconnected filmlike morphology has been synthesized in a single step by coupling a nonhydrolytic condensation reaction of a Ti precursor with a hybrid sol-gel combustion reaction. The method combines the advantages of a conventional sol-gel method for the formation of porous structures with the high crystallinity of the products obtained by combustion methods to yield highly crystalline, phase-pure nanoporous anatase. The generation of pores is initiated by the formation of reverse micelles in a polymeric polycondensation product, which expand during heating, leading to larger pores. A reaction scheme involving a complex formation and nonhydrolytic polycondensation reaction with ester elimination leads to the formation of ail extended Ti-O-Ti network. The effect of process parameters, such as temperature and relative ratio of cosurfactants, on phase formation has been studied. The possibility of band gap engineering by controlled doping during synthesis and the possibility of attachment of molecular/nanoparticle sensitizers provide opportunities for easy preparation of photoanodes for solar cell applications.

Item Type: Journal Article
Publication: Journal Of Physical Chemistry C
Publisher: American Chemical Society
Additional Information: Copyright for this article belongs to American Chemical Society.
Department/Centre: Division of Chemical Sciences > Materials Research Centre
Date Deposited: 09 Dec 2009 09:53
Last Modified: 19 Sep 2010 05:52
URI: http://eprints.iisc.ac.in/id/eprint/24825

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