Abstract
Cobalt ferrite is a promising material for many therapeutic applications, photo-catalysis, gas detectors, high-density data storage, etc. Optimization of process parameters has a vital role in tailoring its properties. Present work reports effect of precursor pH on the properties of cobalt ferrite nanoparticles dispersed in silica. Crystallite size shows escalation from 16 to 18.5 nm with increase in pH. Many undesired phases were observed at lower precursor pH. Lattice parameter and particle size distribution showed significant impact of pH. Silica matrix showed momentous change in its structure giving a high porosity structure at pH 9. Magnetic parameters show effects due to γ-Fe2O3 phase and pH. Effect on catalytic properties was investigated for the synthesis of 5-(4-chlorophenyl)-1,2,4-triazolidine-3-thione. Structural and morphological changes due to change in pH were found to enhance the catalytic yield considerably. Exquisiteness of the material as a catalyst is that it is magnetically separable and can be reused successively, making it an economic and green catalyst.
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Acknowledgements
Authors greatly acknowledge the Department of Science and Technology, Govt. of India, New Delhi, for financial assistance under DST-FIST scheme (SR/FST/College-258/2015, dtd.14th Sep, 2016), UGC of India (Grant number F. 47-710/13WRO). Authors also thank colleagues and students of the department for their support in this work. Authors express sincere thanks to Dr. Sanjay Malpani, Chairman, S.P. Sanstha and the Principal Dr. K. K. Deshmukh for encouragement and infrastructure facilities.
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Bardapurkar, P.P., Shewale, S.S., Arote, S.A. et al. Effect of precursor pH on structural, magnetic and catalytic properties of CoFe2O4@SiO2 green nanocatalyst. Res Chem Intermed 47, 1919–1939 (2021). https://doi.org/10.1007/s11164-020-04366-7
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DOI: https://doi.org/10.1007/s11164-020-04366-7