MUMBAI, India, April 17 -- Intellectual Property India has published a patent application (202641022976 A) filed by Mrs. R. Sasirekabai; and Dr. K. Ravichandran, Perambalur, Tamil Nadu, on Feb. 26, for 'sno2: v/g-c3n4 nanocomposite enriched with papaya peels-elicited enzyme for photocatalytic dye detox.'
Inventor(s) include Dr. T. Jayakumari; Dr. N. Muruganantham; Dr. R. Govindharaju; Dr. R. Mohan; and Dr. K. Neethidevan.
The application for the patent was published on April 17, under issue no. 16/2026.
According to the abstract released by the Intellectual Property India: "Sn02:V/g-C3N4 nanocomposite enriched with papaya peels-elicited enzyme for photocatalytic dye detoxification and cytotoxic applications The present invention relates to a bio-waste-derived enzyme-functionalized Sn02: V /g-C3N4 nanocomposit~ and a method for its preparation using a simple soft chemical route. The nanocomposite comprises vanadium-doped tin dioxide 10 (Sn02:V) coupled with graphitic carbon nitride (g-CJN4) and functionalized with enzyme extracted from papaya peels. The enzyme-functionalized nanocomposite exhibits enhanced visible-light photocatalytic activity and is effective in degrading cationic methylene blue and anionic rose Bengal dyes, both individually and in mixed form, achieving degradation efficiencies of about 98% and 95% respectively 15 within 45 minutes of irradiation. Morphological analysis confirms the successful coupling of Sn02:V and g-CJN4. The nanocomposite further demonstrates significant cytotoxic activity against human lung carcinoma A-549 cells, with an ICso value of about 7.33 J.Lg/mL. Electrochemical studies reveal high electrical conductivity, superior ion transport, and low charge transfer resistance, indicating 20 suitability for electrochemical applications. The invention provides a multifunctional, environmentally benign, and biocompatible nanomaterial for wastewater."
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