Bacterial synthesis of phtocatalytically active and biocompatible TiO2 and ZnO nanoparticles

TitleBacterial synthesis of phtocatalytically active and biocompatible TiO2 and ZnO nanoparticles
Publication TypeJournal Article
Year of Publication2010
AuthorsSingh, S, Britto, VD, Bharde, AA, Sastry, M, Dhawan, A, Prasad, BLV
JournalInternational Journal of Green Nanotechnology: Physics and Chemistry
Date PublishedDEC
KeywordsBiosynthesis, genotoxicity, Nanoparticles, Nanotoxicity, Photocatalysis

TiO2 and ZnO nanoparticles are well known for their photocatalytic and ultraviolet (UV)-absorbent properties and have successfully entered into the market as consumer products. Large volume production of these nanoparticles by industries require environmentally friendly processes of synthesis. In this article, we show that when challenged with an appropriate precursor, the bacterium Actinobacter spp. can lead to the extracellular synthesis of ZnO and TiO2 nanoparticles. The biological way of synthesizing these materials probably leads to the in situ doping of elements like C, F, and N into their crystal lattices, which is evidenced by a red shift in the absorption edge. Because the doping is expected to affect the photocatalytic activity of these materials under different light conditions, such investigations have also been undertaken here. Further, the biocompatibility of these nanomaterials (cytotoxicity and genotoxicity) has also been investigated in detail.

Funding Agency

Council of Scientific & Industrial Research (CSIR) - India

Type of Journal (Indian or Foreign)


Impact Factor (IF)


Divison category: 
Physical and Materials Chemistry