Photocatalytic destruction of Escherichia coli in water over rGO/TiO2 nanocomposites
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Date
2022-07
Journal Title
Journal ISSN
Volume Title
Publisher
Indian Society for Health and Advanced Research
Abstract
In the present study, Graphene-TiO2 catalysts are prepared by solvothermal method with varied graphene concentrations (1%, 2.5% and 5%). The prepared nanocomposites were characterized by FTIR, Raman and TEM. The photocatalytic activity towards the destruction of Escherichia coli in water under UV and UV-visible irradiations were studied. Graphene-TiO2 nano composite destructs the bacteria significantly at higher rates than unmodified TiO2 and graphene. The results indicates that, at the beginning, the inactivation of E. coli cells is more due to the generation of reactive oxygen species (ROS) like, OH, H2O2, and O2– . Among all samples, the nano composite containing 2.5 wt.% of graphene exhibits a complete E. coli destruction in a minimum irradiation time of 15 and 20 min under UV–Visible and UV light irradiation respectively. The high photocatalytic activity is achieved with the optimum loading concentration of 2.5 wt. % graphene on titania
Description
Keywords
Photocatalyst, Graphene Nanocomposite, UV light, Visible light, E-coli
Citation
Mishra Shailendra Prasad, Sethi Diptipriya, Rauta Prem Ranjan, Satapathy Pramod Kumar, Mohapatra Priyabrat. Photocatalytic destruction of Escherichia coli in water over rGO/TiO2 nanocomposites. Paripex - Indian Journal Of Research. 2022 Jul; 11(7): 78-80