Influence of metallic species for efficient photocatalytic water disinfection: bactericidal mechanism of in vitro result
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ENVIRONMENTAL TOXICOLOGY AND RISKS ASSOCIATED WITH HUMAN HEALTH
Influence of metallic species for efficient photocatalytic water disinfection: bactericidal mechanism of in vitro results using docking simulation Aaima Iftikhar 1 & Muhammad Saqib Khan 1 & Umer Rashid 2 & Qaisar Mahmood 1 & Habiba Zafar 1 & Muhammad Bilal 1 & Nadia Riaz 1 Received: 29 October 2019 / Accepted: 21 April 2020 # Springer-Verlag GmbH Germany, part of Springer Nature 2020
Abstract TiO2-based heterogeneous photocatalysis systems have been reported with remarkable efficiency to decontaminate and mineralize a range of pollutants present in air and water medium. In the present study, a series of visible light active metal oxide TiO2 nanoparticle were synthesized and evaluated for their photodegradation efficiency against emerging textile pollutant (Reactive Yellow 145) and antibacterial applications. In the first phase, nanomaterial synthesis was carried out following various synthesis parameters like addition of metallic impurities (different types and concentration) and calcination temperature. In the second phase, synthesized nanomaterials were screened for their performance in terms of photocatalytic degradation of RY145 and the best one (Fe-1-T-3 with 100% RY145 removal within 80 min of irradiation) was further optimized against various reaction parameters. To get knowledge about the insights of nanomaterial performance for degradation of different environmental pollutants, the most important is to understand their physicochemical properties utilizing different characterization techniques. The physical morphology and elemental dispersion of metal-doped TiO2 nanomaterials were analyzed and results indicated that added metallic impurities were well dispersed onto the substrate surface. The efficient nanomaterials selected from initial screening were further assessed for photocatalytic disinfection efficiency against human pathogenic bacterial strains. Antimicrobial activities of the metal oxide nanomaterial were tested against gram-positive and gram-negative pathogenic bacterial strains. Possible mode of interaction of nanomaterial with bacterial DNA for bacterial cell inactivation was predicted using molecular docking simulation. The research project has the potential to contribute to multiple disciplines like material synthesis, water disinfection, and as green solutions for the textile industry replacing traditional technologies. Keywords Titanium dioxide (TiO2) . Photocatalytic disinfection . Metal oxides . Textile pollutants . Molecular docking simulation
Introduction
Responsible editor: Suresh Pillai Electronic supplementary material The online version of this article (https://doi.org/10.1007/s11356-020-08974-z) contains supplementary material, which is available to authorized users. * Nadia Riaz [email protected]; [email protected] 1
Department of Environmental Sciences, COMSATS University Islamabad, Abbottabad Campus, Abbottabad 22060, Pakistan
2
Department of Chemistry, COMSATS University Islamabad, Abbottabad Campu
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