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In this study, polyaniline/Clay nanomaterials (PANI/Clay) was synthesized through one-step method and used as an adsorbent to remove Cu(II) ions from aqueous solution. The PANI/Clay was characterized using X-ray diffraction, Fourier transform infrared spectroscopy, thermogravimetric analysis, cyclic voltammograms and physical adsorption of gases. Adsorption parameters such as contact time, pH value, and initial metal ion concentration were investigated. The results revealed that PANI/Clay exhibits a much higher adsorption capacity than the natural clay; the attractive adsorption capacity reached 22.77 mg/g with 0.05 g of 100 mg PANI/Clay at an initial pH solution of 6 and adsorption temperature of 25 °C. Moreover, the Langmuir model well describes the adsorption data with the maximum sorption capacity of 22.77 mg/g. Pseudo-second-order model can fit well the kinetic data obtained from batch Cu(II) removal experiments. The Cu(II) adsorption on PANI/Clay nanocomposite was mainly attributed to electrostatic interaction, donor–acceptor interaction and intermolecular interactions.

Nanocomposites of polymer/V 2 O 5 based on aniline and p -benzoquinine monomers have been synthesized by in situ polymerization method. The PANI/V 2 O 5 and poly(ANI- p BQ)/V 2 O 5 with different amounts of V 2 O 5 (0.5 g and 1.5 g) were characterized by XRD, FT-IR, UV–Vis, SEM and TGA. This results confirmed the distribution of V 2 O 5 in polymers matrix and confirms that poly(ANI- p BQ)/V 2 O 5 form demonstrates a good electrical conductivity and higher crystalline nature than that of PANI/V 2 O 5 samples. FT-IR spectrum has confirmed successful synthesis of polymer/v 2 O 5 , optical and electrical properties were discussed. Also, the results of the electrochemical test showed a clear and good electroactivity for samples.

This work investigated the elimination of Methyl Orange (MO) using a new adsorbent prepared from Activated Carbon (AC) with polyaniline reinforced by a simple oxidation chemical method. The prepared materials were characterized using XRD, TGA, FTIR and nitrogen adsorption isotherms. Furthermore, PANI@CA highest specific surface area values (near 332 m2 g−1) and total mesoporous volume (near 0.038 cm3 g−1) displayed the better MO removal capacity (192.52 mg g−1 at 298 K and pH 6.0), which is outstandingly higher than that of PANI (46.82 mg g−1). Besides, the process’s adsorption, kinetics, and isothermal analysis were examined using various variables such as pH, MO concentration and contact time. To pretend the adsorption kinetics, various kinetics models, the pseudo first- and pseudo second- orders, were exercised to the experimental results. The kinetic analysis revealed that the pseudo second order rate law performed better than the pseudo first order rate law in promoting the formation of the chemisorption phase. In the case of isothermal studies, an analysis of measured correlation coefficient (R2) values showed that the Langmuir model was a better match to experimental results than the Freundlich model. By regeneration experiments after five cycles, acceptable results were observed.