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Photocatalytic, anti-microbial, antioxidant and cytotoxic activity of electrochemically synthesized ZnO-TiO2 nanostructures

Author Affiliations

  • 1Department of Chemistry, St Aloysius College (Autonomous), Mangalore-575003, India
  • 2College of Fisheries Mangalore-575003, India
  • 3St Agnes Centre for Post Graduate Studies and Research, Mangalore-575002, India
  • 4Department of Chemistry, St Aloysius College (Autonomous), Mangalore-575003, India

Res.J.chem.sci., Volume 10, Issue (2), Pages 8-20, June,18 (2020)

Abstract

Mixed metal oxide nanoparticles (NPs) of ZnO-TiO2 (ZTiO) were synthesized using a simplistic two-step electrochemical-thermal route in the presence and absence of three surfactants: Cetyltrimethyl ammonium bromide (Cetrimide), Sodium dodecyl sulphate (SDS) and polyethylene glycol (PEG). This investigation intended to assess the possible applicability of these nanocomposites for degradation of 2 organic aqueous dyes-methylene Blue (MB) and Eriochrome Black-T (EBT). The potential application of ZTiO as antimicrobial agents was also investigated using disc diffusion technique against the Gram-negative bacteria, Pseudomonas aeruginosa, Escherichia coli, Klebsiella pneumoniae and the Gram-positive Staphylococcus aureus. Antioxidant property of the NPs was established by DPPH radical scavenging technique. The particles show a considerably high bacteriostatic effect towards all the pathogens tested. ZTiO also showed significant cytotoxicity to HeLa breast cancer cells. This proves that the electrochemical synthetic route with its low cost and high efficiency is a competent technique for the large-scale synthesis of heterometal oxide photocatalysts which could potentially be used as effective therapeutic agents.

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