MUMBAI, India, Feb. 13 -- Intellectual Property India has published a patent application (202541124446 A) filed by Saveetha Institute Of Medical And Technical Sciences, Chennai, Tamil Nadu, on Dec. 10, 2025, for 'metal free nitrogen rich photocatalyst g-c3n4/g-c3n5 materials for rapid degradation of organic water pollutants.'
Inventor(s) include Aswiniravi; Rajeshkumar Shanmugam; Sasikala Velusamy; Sasikala Nallaswamy; and Deepak Nallaswamy Veeraiyan.
The application for the patent was published on Feb. 13, under issue no. 07/2026.
According to the abstract released by the Intellectual Property India: "Water pollution caused by persistent organic dyes and related contaminants poses a major environmental challenge, requiring efficient and sustainable remediation technologies. In this invention, a novel class of metal-free nitrogen-rich photocatalysis comprising g-C3 N4, gC3 N5, and their nanocomposite has been developed through a simple thermal polycondensation process using low-cost, non-toxic precursors. Structural and morphological . --analysis .revealed a-porous-layered_framework__w.ith uniform_nano_s_cale_~~.tu_r~~,._enhanceg _____ _ --crystallinity, .. and .increased. surface._roughness,_ enabling_greater ac~ive_ site exp_()_SJ!rs: and improved charge transfer. The integration of g-C3 N5 into the g-C3 N4 matrix significantly enhanced nitrogen content, tuned the electronic structure, and suppressed electron-hole recombination, thereby extending visible-light absorption and enlarging the specific surface area. As a result, the g-C3 N4 /C3 N5 nanocomposite exhibited superior photocatalytic peJ:formance in degrading hazardous dyes such as Rhodamine 8, along with excellent stability and reusability over multiple cycles. This eco~friendly, cost-effective, and scalable photocatalyst provides a sustainable pathway for wastewater treatment and offers broad potential for the removal of diverse industrial pollutants."
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