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Journal of Nanoparticle Research

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01-11-2014 | Research Paper

Biogenesis of TiO₂ nanoparticles using endophytic Bacillus cereus

Authors: Swetha Sunkar, C. Valli Nachiyar, Rashmi Lerensha, K. Renugadevi

Published in: Journal of Nanoparticle Research | Issue 11/2014

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Abstract

Synthesis of nanoparticles has attracted a lot of attention due to their unusual optical, photoelectrochemical, and electronic properties. Semi conductor TiO₂ nanoparticles are known to be effective UV absorbers or photocatalysts, thereby making them important in environmental purification. The present study reports a simple, green, and easily reproducible method for the synthesis of TiO₂ NPs using the endophytic bacteria Bacillus cereus under ambient conditions. The synthesized TiO₂ NPs were characterized for their size, shape, and crystalline nature using various instrumental analyses. Anatase TiO₂ NPs were formed whose size was in the range of 69–140 nm which was confirmed further by XRD analysis. The surface topology was studied by AFM analysis, and the SEM micrographs displayed the 2D images of the TiO₂ NPs. EDX analysis was performed to confirm the presence of the elements in the sample. Phytotoxic analysis of these nanoparticles was carried out, and it was found that germination rate was not affected but there is a decrease in the length of the roots by around 40 %. But these TiO₂ nanoparticles did not show significant cytotoxicity in normal cells (Vero) compared to cancer cells (Hep2). This study offers a feasible and ecofriendly alternative to the existing syntheses methods and suggests a plausible means for the large-scale production of TiO₂ NPs.

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Title: Biogenesis of TiO2 nanoparticles using endophytic Bacillus cereus
Authors: Swetha Sunkar
C. Valli Nachiyar
Rashmi Lerensha
K. Renugadevi
Publication date: 01-11-2014
Publisher: Springer Netherlands
Published in: Journal of Nanoparticle Research / Issue 11/2014
Print ISSN: 1388-0764
Electronic ISSN: 1572-896X
DOI: https://doi.org/10.1007/s11051-014-2681-y

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