Eco-Friendly Photodegradation and Anti-bacterial Treatment of Dye Effluents with special reference to Malachite Green using SrFe₁₂O₁₉/TiO₂/ZnO Ternary Nanocomposites

DOI

10.2991/978-94-6463-648-2_18How to use a DOI?

Keywords

SrFe12O19/ZnO/TiO2 nanomagnetic composites; Visible-light Photodegradation; Malachite Green dye

Abstract

A novel ternary metal oxide nanocomposite (SrFe₁₂O₁₉/TiO₂/ZnO) was synthesized using the sol-gel method for malachite green dye degradation. The absorption maximum was determined by ultraviolet-diffuse reflectance spectroscopy (DRS), revealing a bandgap of 2.29 eV. Fourier transform infrared spectroscopy (FT-IR) confirmed the formation of metal-oxygen bonds, indicating the presence of functional groups in the fabricated metal oxides. The average crystallite size was calculated to be around 30 nm based on X-ray powder diffraction (XRD) analysis. Structural properties, phase purity, and surface morphology were examined using scanning electron microscopy (SEM), while high-resolution transmission electron microscopy (HR-TEM) showed a spherical morphology. The elemental composition was determined via energy-dispersive X-ray analysis (EDAX), and magnetic properties were studied through vibrating sample magnetometry (VSM). The nanocomposite exhibited 100% degradation of malachite green dye Lambda max – 917 nm at a 10-ppm concentration, pH-8 under visible light, demonstrating superior photocatalytic activity compared to pure magnetite and SrFe₁₂O₁₉/TiO₂/ZnO. This enhanced efficiency is attributed to the synergistic interaction between TiO₂, ZnO, and SrFe₁₂O₁₉, which improves charge separation, light absorption, and the generation of reactive oxygen species (ROS), promoting pollutant degradation. Antibacterial tests against Gram-negative Salmonella enterica (ATCC no: 35664) and Gram-positive Mycobacterium tuberculosis (ATCC no. 25618/H37RV) revealed potent activity, with the nanocomposite reusable for up to three cycles. Therefore, this highly efficient, cost-effective, and reusable catalyst is suitable for removing toxic organic pollutants from industrial wastewater.

Copyright

© 2025 The Author(s)

Open Access

Open Access This chapter is licensed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/), which permits any noncommercial use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license and indicate if changes were made.

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TY  - CONF
AU  - Ch. Ramya Kumari
AU  - K. Jyothi Priya
AU  - M. Suneetha
AU  - N. Sridevi Chandrakala
AU  - T. Bulli Babu
AU  - M. Padma
AU  - S. Paul Douglas
PY  - 2025
DA  - 2025/02/07
TI  - Eco-Friendly Photodegradation and Anti-bacterial Treatment of Dye Effluents with special reference to Malachite Green using SrFe₁₂O₁₉/TiO₂/ZnO Ternary Nanocomposites
BT  - Proceedings of the International Conference on Bio-Based Environment for Sustainable Territory (ICBEST 2024)
PB  - Atlantis Press
SP  - 231
EP  - 255
SN  - 2468-5747
UR  - https://doi.org/10.2991/978-94-6463-648-2_18
DO  - 10.2991/978-94-6463-648-2_18
ID  - Kumari2025
ER  -