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Phase Modifications of WO3 Nanoparticles with Green Capping Agents for Effective Removal of Copper Ions from Waste Water

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Abstract

Different phases of tungsten trioxide (WO3) nanoparticles were synthesised by hydrothermal method involving the extracts of avverhoea bilimbi, citrus limon and tamarindus indica as capping agents. These synthesized nanomaterials were characterized through X-ray diffraction, Raman spectra, Transmission electron micrographs, diffuse reflectance spectra and photoluminescence spectral techniques. The X-ray diffraction patterns and Raman spectra corroborate the formation of different crystal phases viz., monoclinic (m-WO3), orthorhombic (o-WO3) and hexagonal (h-WO3). The morphological and topographical studies were acquired from SEM and TEM images. The surface parameters were examined from BET isotherms. The absorption spectra reveal that the optical band gap energy is found to be higher for h-WO3. The adsorption of Cu(II) ions were found to be effective provided with optimum conditions and the adsorption capacity was found to be 174.5 mgg−1 by the h-WO3 nanoparticles. A study on Langmuir, Freundlich, D–R and Temkin isotherm models, deviation in D–R model implies that the adsorption is chemisorption process and follows pseudo-second order kinetics. The adsorption process is found to be spontaneous and exothermic from the thermodynamic parameters.

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  1. Research Department of Chemistry, St. Xavier’s College (Autonomous), Palayamkottai, Tirunelveli, Tamil Nadu, 627002, India

    A. Jerold Antony & S. Mary Jelastin Kala

  2. Department of Chemistry, St. John’s College, Tirunelveli, Tamil Nadu, 627002, India

    C. Joel, R. Biju Bennie & A. Nirmal Paul Raj

  3. Affiliated to Manonmaniam Sundaranar University, Abishekapatti, Tirunelveli, Tamil Nadu, 627012, India

    A. Jerold Antony & S. Mary Jelastin Kala

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Antony, A.J., Kala, S.M.J., Joel, C. et al. Phase Modifications of WO3 Nanoparticles with Green Capping Agents for Effective Removal of Copper Ions from Waste Water. J Inorg Organomet Polym 32, 367–382 (2022). https://doi.org/10.1007/s10904-021-02147-2

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