Polyvinyl chloride grounded cobalt molybdophosphate nanocomposite membrane: comparative study of fixed charge density.

Polyvinyl chloride (PVC)-derived cobalt molybdophosphate (CMP) nanocomposite material was synthesized by sol-gel technique. The physico-chemical properties such as composition, functional groups, thermal stability, phase transition, and surface structure were characterized using TGA, FT-IR, SEM, and TEM analyses. Membranes from the nanocomposite material were prepared to elucidate the electrochemical properties. The ionic potential was measured using strong electrolytes such as KCl, NaCl, and LiCl. Electrolytes have the following cation-sequenced with observed membrane potentials Li+ > Na+ > K+. The estimated membrane charge density was calculated for membrane performance. Membrane characteristics, such as transport number, mobility ratio, and charge efficiency, were determined using the Teorell–Meyer–Sievers (TMS) theory framework. LiCl has the highest value of t+ and ω ¯ . The nanocomposite membrane is lithium cation-selective, which can, therefore, be effectively utilized in various electro-membrane processes such as lithium-ion extraction and removal. [ABSTRACT FROM AUTHOR]