Authors:
N. Kohila, P. Subbulakshmi
Addresses:
Department of Chemistry, Aditanar College of Arts and Science, Affiliated to Manonmaniam Sundaranar University, Tirunelveli, Tamil Nadu, India.
Abstract:
A novel organic–inorganic nanocomposite cation exchanger, polyaniline cerium (IV) tungstomolybdate (PANI/Ce (IV)TM), was synthesised via sole-gel mixing of an organic polyaniline polymer into an inorganic cerium (IV) tungstomolybdate framework. Polyaniline was prepared through oxidative coupling using K2S2O8 in an acidic medium, with binding driven by ionic interactions between the polyaniline radical cations and the anionic groups of the inorganic matrix. FT-IR and UV-V spectroscopy confirmed successful composite formation, while XRD verified its crystalline nature with an average particle size of 8.7 nm. SEM imaging revealed distinct surface-morphology alterations post-incorporation. Compared to its precursors, PANI/Ce (IV)TM demonstrated an enhanced ion-exchange capacity, reaching 3.0 meq/g for K+ and 2.1 meq/g for Ba2+. Column dynamic trials revealed a selective affinity sequence (K+ > Na+ and Ba2+ > Sr2+ > Ca2+) governed by hydrated ionic radii. The hybrid exhibited remarkable chemical stability in organic solvents and concentrated acids (up to 7N), though it underwent alkaline hydrolysis. Crucially, the nanocomposite displayed highly efficient adsorption toward methyl violet dye. With excellent granulometric properties and reproducibility, PANI/Ce (IV)TM is a highly promising, sustainable adsorbent for industrial wastewater treatment and selective heavy-metal recovery.
Keywords: Organic–Inorganic Hybrid; Organic Polyaniline Polymer; Cation Exchanger; Polyaniline and Cerium (IV) Tungstomolybdate; Wastewater Remediation; Dye Adsorption; Cation Exchange.
Received on: 24/12/2024, Revised on: 15/02/2025, Accepted on: 28/04/2025, Published on: 03/03/2026
DOI: 10.64091/ATIAS.2026.000295
AVE Trends in Intelligent Applied Sciences, 2026 Vol. 2 No. 1 , Pages: 45-58