Abstract
The core–shell ThO2-PANI nanocomposite was synthesized using polyaniline (PANI) as a favorable conducting polymer and used for the removal of Cr(VI) from water. Thorium dioxide (ThO2) nanoparticles were embedded by PANI via an in situ polymerization process. The formation of the material was investigated by XRD, FESEM, EDX, TEM, TGA-DTA, FTIR, Raman, XPS, and N2 sorption isotherm analysis. The FESEM and TEM analyses confirmed that PANI was successfully formed on the ThO2 surface. The ThO2-PANI nanocomposite could effectively adsorb Cr(VI) through electrostatic attractions, which were partially reduced to Cr(III) during the adsorption experiment, ensuring the proficient adsorption as well as better removal of Cr(VI) from water. The synthesized nanocomposite material exhibited a high uptake capacity toward Cr(VI) as compared to other reported materials. The adsorption kinetics data sufficiently defined the pseudo-second-order kinetic model. The Cr(VI) adsorption onto ThO2-PANI was greatly dependent on the s...
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