Abstract
Magnetic iron oxide nanoparticles were immobilized on microporous molecular sieves (13X) via a plant extract mediated green synthesis method. The prepared material was then characterized using XRD, FTIR, TGA, FESEM, and TEM techniques. The synthesized iron oxide nanoparticles-molecular sieves (Fe2O3/MS) composite showed excellent photodegradation of methylene blue (MB) at 99% efficiency. Enhanced photocatalytic properties were observed in comparison with the pure iron oxide (Fe2O3) nanoparticles synthesized. Catalytic conversion of triglycerides to fatty-acid ethyl esters (FAEE) was carried out using sunflower oil, and the reaction showed very good catalytic activity in the transesterification of sunflower oil, converting 84% of the sunflower oil to FAEE. The catalyst was also used in the esterification reaction and found to have excellent applicability. The catalyst showed excellent reusability, and easy separation from the reaction mixture using an external magnet. This enables the synthesized material to act as a promising photocatalyst in degradation and organic synthesis. Very few reports are available on the synthesis of magnetic iron oxide coated on molecular sieves and used for photodegradation, transesterification, and esterification catalysis.
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Acknowledgements
One of the authors Dr. Aatika Nizam acknowledges the support from CHRIST (Deemed to be University) for the research project funding (MRP #MRPDSC-1722). Also acknowledging the support of Advanced Facility for Microscopy and Microanalysis (AFMM), IISc, Bangalore and Sophisticated Test and Instrumentation Centre (STIC), Cochin. Dr. G. Nagaraju acknowledges the support from DST-Nanomission ((SR/NM/NS-1262/2013) Govt. of India, New Delhi in providing characterization techniques.
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Nizam, A., Warrier, V.G., Devasia, J. et al. Magnetic iron oxide nanoparticles immobilized on microporous molecular sieves as efficient porous catalyst for photodegradation, transesterification and esterification reactions. J Porous Mater 29, 119–129 (2022). https://doi.org/10.1007/s10934-021-01150-9
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DOI: https://doi.org/10.1007/s10934-021-01150-9