Green-synthesized Sr/HAP/MgFe2O4 nanocomposite for photocatalytic dye degradation
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Saikatendu Deb Roy
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Krishna Chandra Das
Abstract
The green synthetic route has been an alternative to conventional practices for synthesizing magnetic nano oxides to degrade organic dyes. The present work reports the synthesis of magnesium ferrite via the coprecipitation method using Carica papaya fruit extract. Hydroxyapatite is obtained from fish bones (food waste) by calcination which was used to encapsulate magnesium ferrite. Strontium nitrate has been mixed via sonication followed by drying and calcination to decorate the composite surface to form Sr/HAP/MgFe2O4, where Strontium exists as strontium oxide supporting HAP/MgFe2O4. The samples synthesized are analyzed by X-ray Diffraction (XRD), Fourier Transform Infrared Spectroscopy (FT-IR), Scanning Electron Microscopy (SEM), Transmission Electron Microscopy (TEM), and Electron Dispersion Spectroscopy (EDS) to confirm the composition of the material. X-ray Photoelectron Spectroscopy (XPS) confirms the core shell contains magnesium ferrite and other elemental composition. The encapsulated material showed potential photocatalytic efficacy against methylene blue, malachite green, mixture composition dyes viz; aniline blue, malachite green in a 1:1 ratio, and eosin yellow dyes. The material responded as a potent photocatalyst in degrading all the colored organic dyes above 80 % within 120 min, exploring its potential photocatalytic efficacy. The kinetic study reveals the degradation pathway follows pseudo-first-order kinetics.
Acknowledgments
Authors greatly acknowledge the support of the Department of Chemistry, Gurucharan College for providing experimental lab facilities, SAIF NEHU (Shillong) for TEM images, Central Instrumentation facility NIT Silchar for XRD analysis, STIC Cochin University for SEM-EDS and IR analysis and, CSIR NEIST for XPS analysis.
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Research ethics: Not applicable.
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Informed consent: All the Co authors were informed and they have agreed to participate in the review process.
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Author contributions: Saikatendu Deb Roy has carried out Experimentation, Data analysis and preparation of the manuscript. Dr Krishna Chandra Das associate professor at the Department of Chemistry GC College has carried out editing and reviewing the manuscript. Prof. Siddhartha Sankar Dhar Department of Chemistry, NIT Silchar has done overall Supervision. Mr. Arindam Roy Department of Physics, NIT Silchar has carried out Rietveld analysis of the composite.
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Use of Large Language Models, AI and Machine Learning Tools: None declared.
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Conflict of interest: The authors state no conflict of interest.
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Research funding: None declared.
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Data availability: Will be made available on request to the corresponding author.
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Supplementary Information: Not applicable.
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