During the past decades, the interest has grown in developing significant noble metal embedded metal oxides to enhance the properties of metal oxide in various technological applications. Hybrid metal oxide nanostructures are extensively explored for photocatalysis, anti-microbial activity, biomedical, environmental and many other applications. The growth of harmful biopathogens such E. coli in various water bodies is a serious concern of water contamination. Such microbes are responsible for various health hazards to humans and other organisms. Taking these facts into consideration, we have synthesized SnO2 nanostructures with dopant as Ag for the biorational evaluation of hazardous E. coli population. The synthesized SnO2 (undoped and doped with Ag) nanostructures were characterized with various techniques. From various techniques, the obtained nanostructures have a tetragonally rutile structure with band gap of 3.59 eV for undoped SnO2 nanostructures which was decreased to 3.39 eV after doping. Antibacterial activity against E. coli was performed and a continuous decrease of microbial count was observed. The apoptosis of E.coli colonies were induced by metabolic failure due to generation of hydrogen peroxide. Hydrogen peroxide was generated by the free radical mechanism initiated by the photocatalytic splitting of water.

Development of hybrid SnO2 nanostructures for photocatalytic apoptosis of E.coli in water

ACS Spring Meeting 2021

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