alexa Solar Light Induced Photo Catalytic Disinfection of Gra
ISSN: 2155-9821

Journal of Bioprocessing & Biotechniques
Open Access

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Research Article

Solar Light Induced Photo Catalytic Disinfection of Gram Positive and Negative Microorganisms from Water with Highly Efficient AuTiO2 Nanoparticle

Sandhya S1*, Sadhana Rayalu2 and Benedict Bruno1
1CSIR-National Environmental Engineering Research Institute, CSIR-Complex, Chennai, India
2CSIR-National Environmental Engineering Research Institute, Nagpur, India
Corresponding Author : Sandhya S
CSIR-National Environmental Engineering Research Institute
CSIR-Complex, Chennai, India
Tel: 044-255-419-64
E-mail: [email protected]
Received July 14, 2014; Accepted September 18, 2014; Published September 24, 2014
Citation: Sandhya S, Rayalu S, Bruno B (2014) Solar Light Induced Photo Catalytic Disinfection of Gram Positive and Negative Microorganisms from Water with Highly Efficient AuTiO2 Nanoparticle. J Bioprocess Biotech 4:176. doi: 10.4172/2155-9821.1000176
Copyright: © 2014 Sandhya S, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.


AuTiO2 nanomaterial was used for solar photocatalytic disinfection of gram negative Escherichia coli and gram positive Staphylococci aureus. In this study, time of disinfection, light intensity, concentration of nanomaterial and bacterial concentration effects has been investigated. Prepared nanomaterial characterized using Scanning Electron Microscopy (SEM), X-Ray Diffractometry (XRD). AuTiO2 samples have shown antibacterial effect when irradiated in solar light. The bactericidal effect may be due to Au ions and photocatalysis of TiO2. The photocatalytic inactivation rate constant, k for each dose were obtained from their respective inactivation curve over a 2 hours incubation period.


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