GREEN SYNTHESIS OF TiO2 NANOPARTICLES: A PROMISING TOOL FOR WASTEWATER TREATMENT

Authors

  • A. Zeenath Bazeera Sadakathullah Appa College (Autonomous), Affiliated to Manonmaniam Sundaranar University Tirunelveli, India
  • Kairon Mubina M. S. Sadakathullah Appa College, Tirunelveli, Tamil Nadu, India https://orcid.org/0000-0003-1345-1890
  • S. M. Abdul Kader Sadakathullah Appa College (Autonomous), Affiliated to Manonmaniam Sundaranar University Tirunelveli, India https://orcid.org/0000-0001-6130-3855
  • M. Anisha Nashrin Sadakathullah Appa College (Autonomous), Affiliated to Manonmaniam Sundaranar University Tirunelveli, India

DOI:

https://doi.org/10.15421/jchemtech.v33i2.319532

Keywords:

TiO2 nanoparticles, Allium sativum, anti-bacterial, antifungal activity, Photodegradation, organic dyes

Abstract

Non-biodegradable organic pollutants, such as textile dyes, pose significant risks to human health and the environment. Photocatalysis offers a sustainable and cost-effective solution for degrading these pollutants while simultaneously preventing microbial contamination. This study investigates the photocatalytic and antimicrobial activities of green TiO₂ NPs synthesized using an aqueous extract of Allium sativum (garlic). XRD analysis confirmed the anatase phase with an average crystallite size of 52 nm, while FTIR identified the characteristic Ti-O-Ti vibrational band at 470 cm⁻¹. The NPs exhibited a band gap of 3.05 eV, UV absorbance at 337 nm, and a spherical morphology with slight agglomeration, as observed by FESEM. Antibacterial activity was demonstrated against Streptococcus pneumoniae and Proteus vulgaris, while antifungal activity was observed against Aspergillus niger and Rhizopus sp. Photocatalytic degradation achieved efficiencies of 78 % for Methylene Blue and 91 % for Rose Bengal, with kinetic rate constants of 0.008 min⁻¹ and 0.013 min⁻¹, respectively. These findings highlight the potential of green TiO₂ NPs as a cost-effective approach for environmental remediation and microbial control.

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Published

2025-07-15

Issue

Vol. 33 No. 2 (2025): Journal of Chemistry and Technologies

Section

Physical and inorganic chemistry

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Copyright (c) 2025 Oles Honchar Dnipro National University

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