Suspended and polycaprolactone immobilized Ag @TiO2/polyaniline nanocomposites for water disinfection and endotoxin degradation by visible and solar light-mediated photocatalysis
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Date
2021
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Springer Science and Business Media Deutschland GmbH
Abstract
In the present study, water contaminated with Escherichia coli (E. coli) cells was photocataytically disinfected using Ag core-TiO<inf>2</inf> shell/Polyaniline nanocomposite (Ag@TiO<inf>2</inf>/PANI) under visible light irradiation. Ag@TiO<inf>2</inf>/PANI containing 13 weight % of Ag@TiO<inf>2</inf> was found to offer maximum disinfection activity. Band gap energy of Ag@TiO<inf>2</inf>/PANI was found to be 2.58 eV. Ag@TiO<inf>2</inf>/PANI nanocomposites were efficient in water disinfection in their suspended and immobilized form. Rate of disinfection with Ag@TiO<inf>2</inf>/PANI was faster than that with Ag@TiO<inf>2</inf> nanoparticles. Water containing 50 × 108 CFU/mL cells was completely disinfected within 120 min with 1 g/L Ag@TiO<inf>2</inf>/PANI nanocomposite. Simultaneous disinfection and endotoxins degradation were achieved. The photocatalytic disinfection of water and endotoxin degradation using Ag@TiO<inf>2</inf>/PANI nanocomposite under visible light irradiation followed second order kinetics. The nanocomposite also exhibited a good solar photocatalytic activity. © 2020, Springer-Verlag GmbH Germany, part of Springer Nature.
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Keywords
bacterium, catalysis, disinfection, immobilization, nanocomposite, nanoparticle, photochemistry, photodegradation, solar activity, toxin, water pollution, Escherichia coli, aniline derivative, endotoxin, polyaniline, polycaprolactone, polyester, silver, titanium, titanium dioxide, water, light, Aniline Compounds, Catalysis, Disinfection, Endotoxins, Light, Nanocomposites, Polyesters, Silver, Titanium, Water
Citation
Environmental Science and Pollution Research, 2021, 28, 10, pp. 12780-12791