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Synthesizing Sodium Tungstate and Sodium Molybdate Microcapsules via Bacterial Mineral Excretion

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Synthesis of TiO2 nanoparticles using microorganisms.

Anal K Jha¹, K Prasad, A R Kulkarni

¹Department of Chemistry, T.M. Bhagalpur University, Bhagalpur, 812007, India. analjha@rediffmail.com

Colloids and Surfaces. B, Biointerfaces

|March 17, 2009

Summary

This study presents a low-cost, green method for synthesizing titanium dioxide (TiO2) nanoparticles using microbes like Lactobacillus and Saccharomyces at room temperature. The biosynthesis resulted in nanoparticles ranging from 8-35 nm, with potential mechanisms involving pH and redox potential.

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Area of Science:

Nanotechnology
Microbiology
Materials Science

Background:

Biosynthesis of metal oxide nanoparticles offers a sustainable alternative to chemical methods.
Microbial synthesis provides a cost-effective and environmentally friendly approach.
Titanium dioxide (TiO2) nanoparticles have diverse applications in catalysis, sensors, and biomedical fields.

Purpose of the Study:

To report a low-cost, green, and reproducible method for synthesizing titanium dioxide (TiO2) nanoparticles using microbial mediation.
To characterize the synthesized TiO2 nanoparticles and investigate the underlying biosynthesis mechanism.

Main Methods:

Biosynthesis of TiO2 nanoparticles using Lactobacillus sp. and Saccharomyces cerevisae at room temperature.
Characterization of nanoparticle size, morphology, and crystalline structure using X-ray and transmission electron microscopy (TEM).
Analysis of selected area electron diffraction (SAED) patterns to determine nanoparticle orientation.

Main Results:

Successfully synthesized TiO2 nanoparticles with sizes ranging from 8-35 nm.
TEM and X-ray analyses confirmed the formation of TiO2 nanoparticles.
SAED patterns indicated that the nanoparticles possess all possible orientations.

Conclusions:

Microbial biosynthesis is a viable, low-cost, and green method for producing TiO2 nanoparticles.
The biosynthesis process is influenced by factors such as pH and redox potential of the culture medium.
The synthesized TiO2 nanoparticles exhibit potential for various applications due to their controlled size and orientation.