Synergistic Ag‐ <scp> Mn ₃ O ₄ </scp> / <scp>SA</scp> / <scp>CNBs</scp> Nanocatalyst: a solution for organic pollutants reduction in wastewater

Abstract BACKGROUND A novel catalyst sodium alginate carbon nitride composite beads loaded with silver and manganese ions (Ag‐Mn 3 O 4 /SA/CNBs) synthesized through an ionic gelation method to effectively reduce the organic pollutants. RESULTS Catalyst is characterized by XRD, SEM, ICP, and FTIR to confirm the successful synthesis of the catalyst. The crystallinity of the catalyst was observed by XRD. SEM confirmed the flakes‐like solid structure of sodium alginate carbon nitride beads (SA/CNBs) and the random structure morphology of Ag‐Mn 3 O 4 /SA/CNBs. The adsorption capacity of Ag‐Mn ions on SA/CNBs was measured by ICP and revealed that the adsorption of Ag is greater than Mn ions. FTIR examined the essential functional groups of catalysts. The catalyst was used with the reducing agent NaBH 4 against Rh, RB, MB, MO, Eosin, and MR to check the % reduction. Results reveal that Ag‐Mn 3 O 4 /SA/CNBs is a promising catalyst in the reduction of organic pollutants in wastewater treatment. CONCLUSION % Reduction of Eosin is maximum (92) and MB is minimum (47.42), MR takes a shorter time (2.5 min) to reduce among all dyes, and Rh B takes maximum reduction time (22). All the reduction reactions follow pseudo‐first‐order reactions. © 2026 Society of Chemical Industry (SCI).