Fungus-mediated biosynthesis of silica and titania particles

Bansal, Vipul ; Rautaray, Debabrata ; Bharde, Atul ; Ahire, Keda ; Sanyal, Ambarish ; Ahmad, Absar ; Sastry, Murali (2005) Fungus-mediated biosynthesis of silica and titania particles Journal of Materials Chemistry, 15 (26). pp. 2583-2589. ISSN 0959-9428

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The synthesis of inorganic materials by biological systems is characterized by processes that occur at close to ambient temperatures, pressures and neutral pH. This is exemplified by biosilicification in marine organisms such as diatoms while laboratory-based synthesis of silica involves extreme temperature and pH conditions. We show here that silica and titania particles may be produced by challenging the fungus Fusarium oxysporum with aqueous anionic complexes SiF62− and TiF62− respectively. Extra-cellular protein-mediated hydrolysis of the anionic complexes results in the facile room temperature synthesis of crystalline titania particles while calcination at 300 °C is required for crystallization of silica.

Item Type:Article
Source:Copyright of this article belongs to Royal Society of Chemistry.
ID Code:47211
Deposited On:07 Jul 2011 05:22
Last Modified:18 May 2016 02:57

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