International Science Community Association Research Journal of Chemical Sciences 16 3 2026 10 18 Conducting Cerium and Silver doped Phosphotungstic acid–polyaniline (Ce, Ag doped PWA-PANI): A multifunctional Nanocomposite for Environmental remediation 33 41 EN Mohammed Jibrin 1 Department of Chemistry, Faculty of Natural & Applied Sciences, Nasarawa State University, Keffi, Nigeria Aremu Matthew Olaleke 2 Department of Chemistry, Faculty of Physical Sciences, Federal University of Lafia, Nigeria Usman Abdullahi 3 Department of Chemistry, Faculty of Physical Sciences, Federal University of Lafia, Nigeria Pare Brijesh 1 Department of Photochemistry, Govt. Madhav Science P.G. College, Ujjain, M.P., India Geed Poonam 2 Department of Photochemistry, Govt. Madhav Science P.G. College, Ujjain, M.P., India Oluchukwu Ndukaire Victory 1 Chemistry Advanced Research Centre, Sheda Science and Technology Complex, Abuja, Nigeria Favour Okonna Chinonso 2 Biotechnology Advanced Research Centre, Sheda Science and Technology Complex Abuja, Nigeria Chinenye Loveth Ogbodo 3 Biotechnology Advanced Research Centre, Sheda Science and Technology Complex Abuja, Nigeria Ajunwa Ameh David 4 Biotechnology Advanced Research Centre, Sheda Science and Technology Complex Abuja, Nigeria Emmanuel David 5 Biochemistry Department, Ibrahim Badamasi Babangida University, Lapai, Niger State, Nigeria Idris Usman 6 Biochemistry Department, Ibrahim Badamasi Babangida University, Lapai, Niger State, Nigeria Nkemakonam Olime Moses 7 Chemistry Advanced Research Centre, Sheda Science and Technology Complex, Abuja, Nigeria Tiwari Smita 1 Department of Chemistry, Shri Shankaracharya Professional University, Bhilai, 491001, India Diwan Vijita 2 Department of Chemistry, Shri Shankaracharya Professional University, Bhilai, 491001, India Sar Santosh Kumar 3 Department of Applied Chemistry, Bhilai Institute of Technology, Durg, 491001, India P.T. Anjana 1 Research Department of Chemistry, Government College, Madappally, Vadakara, 673102 Kerala, India B Preetha 2 Research Department of Chemistry, Government College, Madappally, Vadakara, 673102 Kerala, India > Research Paper 2026 8 12 2026 10 18 Synthesis and characterization of a conductive organic–inorganic composite, cerium and silver doped phosphotungstic acid–polyaniline composite (Ce,Ag doped PWA-PANI) is reported here. Polyaniline is incorporated into the matrices of cerium and silver doped phosphotungstic acid. The composite was prepared by simple stepwise chemical methods and characterized by using SEM, FESEM, EDAX, XRD, FTIR, XPS, UV–DRS, TGA and four–probe conductivity measurements. The studies establish a nano sized, organic–inorganic network structure retaining the Keggin structure of the phosphotungstic acid in which Ce and Ag domains are embedded. FTIR and XPS analyses demonstrate that polyaniline and oxygen bridged metal species are integrated within the phosphotungstate framework. Distribution studies show high selectivity towards Pb²⁺ and Th⁴⁺ ions, indicating its environmental application as a cation exchanger for separation and heavy metal removal from aqueous media. UV-Visible DRS studies reveal an optical band gap of about 2.4 eV. Photocatalytic studies are performed using methylene blue as a model dye indicating efficient degradation, under optimized conditions.The composite shows relatively high and thermally stable electrical conductivity, attributed to synergistic electron and proton transport between polyaniline, Ce, Ag and phosphotungstate groups. The composite, Ce,Ag doped PTA-PANI is found very promising in environmental and electroactive applications. Copyright@ International Science Community Association