Eco-Friendly Synthesis of Nanoparticles Offers Promising Environmental and Medical Applications

Researchers from Annamalai University in Tamil Nadu, India, have developed a method to synthesize cobalt oxide and manganese-doped cobalt oxide nanoparticles using a green, low-cost, and eco-friendly approach. The nanoparticles were obtained by extracting the Ipomoea staphylina leaf extract, which was used as a reducing agent and stabilizer. The synthesized nanoparticles exhibited excellent photocatalytic, antibacterial, and antioxidant properties, making them potentially useful for various environmental and medical applications.

Key Takeaways:

• The researchers used Ipomoea staphylina leaf extract to synthesize cobalt oxide and manganese-doped cobalt oxide nanoparticles in a green, low-cost, and eco-friendly manner.
• The nanoparticles were characterized using XRD, FT-IR, UV-DRS, FE-SEM, EDX, XPS, and PL techniques, showing a face-centered cubic system with an average crystallite size of 28.37 nm and 24.98 nm, respectively.
• The photocatalytic activity of the Mn-Co3O4 NPs was observed to be 94.45% for Congo red and 66.24% for Acridine orange, with a mercury lamp (250 W, 365 nm) at room temperature.
• The Mn-Co3O4 NPs exhibited excellent antibacterial properties against Bacillus subtilis bacteria, inhibiting 1,1-diphenyl-2-picrylhydrazyl (DPPH) free radicals at 66.14%.
• The researchers concluded that the synthesized nanoparticles can be effectively used for various environmental and medical applications.

Statistics:

• The average crystallite size of Co3O4 NPs was 28.37 nm, while that of Mn-doped Co3O4 NPs was 24.98 nm.
• The photocatalytic activity of Mn-Co3O4 NPs was observed to be 94.45% for Congo red and 66.24% for Acridine orange.
• The Mn-Co3O4 NPs inhibited 66.14% of DPPH free radicals.
• 20 mg of Mn-Co3O4 NPs were used to achieve degradation of Congo red and Acridine orange dyes.

Sources:

• NewsRx. New Nanoparticles Findings from Annamalai University Reported (Eco-friendly Synthesis of Co3o4 Nanoparticles Using ipomoea Staphylina Leaf Extract: Photocatalytic, Antibacterial, and Antioxidant Properties). Nanotechnology Weekly. October 27, 2025; p 2276.
• "Eco-friendly Synthesis of Co3o4 Nanoparticles Using ipomoea Staphylina Leaf Extract: Photocatalytic, Antibacterial, and Antioxidant Properties." ChemistrySelect, 2025;10(33).