Author(s):
Ketakee Nichat, Pratiksha Makode, Megha Kosarkar, Anuja Gawai, Amruta Pandav, Janvi Nishanrao
Email(s):
ketakee.nichat@gmail.com
DOI:
10.52711/2231-5691.2026.00060 
Address:
Ketakee Nichat1*, Pratiksha Makode2, Megha Kosarkar2, Anuja Gawai1, Amruta Pandav2, Janvi Nishanrao2
1Department of Pharmaceutics, School of Pharmacy, GH Raisoni University, Amravati – 444701.
2Department of Pharmaceutical Chemistry, School of Pharmacy, GH Raisoni University, Amravati – 444701.
*Corresponding Author
Published In:
Volume - 16,
Issue - 4,
Year - 2026
ABSTRACT:
In recent years, cobalt oxide nanoparticles (CoONPs) have drawn significant attention due to their unique physical, chemical, and optical properties. In this work, we report a simple, rapid, and environmentally friendly method to synthesize CoONPs using microwave irradiation and aqueous extract of radish leaves (Raphanus sativus). The leaf extract acts as both a reducing agent and a stabilizer, eliminating the need for toxic chemicals. The formation of CoONPs was confirmed by a color change to dark brown and further characterized using UV-Visible spectroscopy, Fourier Transform Infrared (FTIR) spectroscopy, X-ray diffraction (XRD), and Transmission Electron Microscopy (TEM). TEM analysis revealed that the nanoparticles are mostly spherical with an average diameter of 8±2 nm. The synthesized nanoparticles demonstrated excellent catalytic activity in the reduction of Methylene Blue (MB), Congo Red (CR), and 4-nitrophenol (4-NP) in the presence of sodium borohydride (NaBH4). The reaction kinetics followed a pseudo-first-order model, with rate constants calculated as 0.332min?¹ (MB), 0.443min?¹ (CR), and 0.330min?¹ (4-NP). These findings suggest that radish leaf extract-mediated CoONPs are promising candidates for the eco-friendly treatment of dye-contaminated industrial wastewater.
Cite this article:
Ketakee Nichat, Pratiksha Makode, Megha Kosarkar, Anuja Gawai, Amruta Pandav, Janvi Nishanrao. Green and Rapid Microwave Synthesis of Cobalt Oxide Nanoparticles from Raphanus sativus Leaf Extract: Characterization and Catalytic Performance. Asian Journal of Pharmaceutical Research. 2026; 16(4):411-6. doi: 10.52711/2231-5691.2026.00060
Cite(Electronic):
Ketakee Nichat, Pratiksha Makode, Megha Kosarkar, Anuja Gawai, Amruta Pandav, Janvi Nishanrao. Green and Rapid Microwave Synthesis of Cobalt Oxide Nanoparticles from Raphanus sativus Leaf Extract: Characterization and Catalytic Performance. Asian Journal of Pharmaceutical Research. 2026; 16(4):411-6. doi: 10.52711/2231-5691.2026.00060 Available on: https://asianjpr.com/AbstractView.aspx?PID=2026-16-4-7
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