Yazar "Ghotekar, Suresh" seçeneğine göre listele

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    Insights into the expeditious photocatalytic performance of greenly fabricated CeVO4 nanoparticles using Polyalthia longifolia leaf extract
    (Elsevier, 2025) Ghotekar, Suresh; Mishra, Soumya Ranjan; Gadore, Vishal; Roy, Saptarshi; Ahmaruzzaman, Md.; Singh, Kshitij R. B.; Singh, Jay
    The application of nanomaterials to address environmental challenges has evolved substantially to eliminate pollutants from wastewater as part of environmental cleanup, a growing important research arena. Using green photocatalysts is a noteworthy and economical method that significantly advances environmentally sustainable remediation. This work disclosed the bio-inspired production of cerium vanadate nanoparticles (CeVO4 NPs) were prepared through a green chemistry protocol employing Polyalthia longifolia leaf extract. Key traits of CeVO4 nanoparticles were determined by applying a variety of characterization tools, including X-ray diffraction (XRD), Raman, Fourier transform infrared (FTIR), X-ray photoelectron spectroscopy (XPS), ultraviolet-visible diffuse reflectance spectroscopy (UVDRS), field emission scanning electron microscopy (FESEM), energy dispersive X-ray (EDX), and high-resolution transmission electron microscopy (HRTEM). CeVO4 nanoparticles displayed a pseudo-spherical topology with a particle size of 17.77 nm, and the band gap was determined as 2.76 eV. The photocatalytic ability of the as-produced CeVO4 NPs was scrutinized for the decomposition of Congo red (CR) dye. Under optimal conditions, the fabricated CeVO4 nanoparticles demonstrated excellent Congo red dye degradation performance. The effect of hydrogen peroxide (H2O2) dosage, nanoparticle dosage, dye concentration, contact time, scavenging test, and reusability of prepared photocatalyst had an excellent impact on dye decomposition ability. The findings revealed that in just 8 min, 97.79 % of the CR dye had been degraded completely. The pseudo-first-order (PFO) kinetics model aligns with the CR dye decomposition kinetics. In conclusion, this study describes the fabrication of a CeVO4 photocatalyst that exhibits impressive performance, particularly in natural sunlight, suggesting that it could be used in wastewater treatment.
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    Öğe
    Insights into the promising heterogeneous catalysis of eco-friendly synthesized spinel CuFe2O4 nanoparticles for Biginelli reaction
    (Springer, 2024) Sanap, Dnyaneshwar; Avhad, Lata; Ahire, Satish; Mirzaei, Mahmoud; Kumar, Deepak; Ghotekar, Suresh; Gaikwad, Nitin D.
    Spinel copper ferrite magnetic nanoparticles (CuFe2O4 MNPs) are one of the prominent spinel ferrites due to their magnetic properties. As a result of the current investigation, the magnetic spinel copper ferrite nanoparticles (CuFe2O4 MNPs) were successfully fabricated via a green synthesis approach using freshly prepared Yogurt of cow milk as a capping agent by sol-gel auto-combustion route and its catalytic effect towards synthesizing ethyl 1,2,3,4-tetrahydro-2-oxo-4-aryl pyrimidine-5-carboxylate (DHPMs) scaffold was explored. Further, the phase formation, crystallinity, particle size, grain morphology, and the property of magnetism of bio-fabricated spinel CuFe2O4 NPs were explored by XRD, FESEM, EDX, FTIR, UVDRS, and VSM analysis. Furthermore, one-pot synthesis of DHPMs scaffold via multicomponent (MCR) Biginelli reaction was examined using biosynthesized spinel CuFe2O4 magnetic heterogeneous catalyst (C1 and C2 nanocrystalline phase). To achieve the high yields (90-98%) of DHPMs scaffold synthesis with an extensive range of aromatic carbaldehyde using minimum loading of heterogeneous catalysts within minimum reaction time and easy catalyst recovery by a peripheral magnet were examined. Therefore, this protocol presents an extensive scope for Biginelli reaction using magnetically separable heterogeneous catalyst synthesis via a green approach.