Hybrid sol−gel combustion synthesis of nanoporous anatase

Mukherjee, B. ; Karthik, C. ; Ravishankar, N. (2009) Hybrid sol−gel combustion synthesis of nanoporous anatase The Journal of Physical Chemistry C, 113 (42). pp. 18204-18211. ISSN 1932-7447

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

Related URL: http://dx.doi.org/10.1021/jp904563m

Abstract

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 an 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:Article
Source:Copyright of this article belongs to American Chemical Society.
ID Code:105044
Deposited On:01 Feb 2018 16:33
Last Modified:01 Feb 2018 16:33

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