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Facile synthesis of polyaniline@UiO-66 nanohybrids for efficient and rapid adsorption of methyl orange from aqueous media

Mirzaei, K ; Sharif University of Technology | 2022

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  1. Type of Document: Article
  2. DOI: 10.1021/acs.iecr.2c00919
  3. Publisher: American Chemical Society , 2022
  4. Abstract:
  5. A series of UiO-66/polyaniline (UiO-66/PANI) nanohybrids with various UiO-66 to aniline weight ratios ranging from 0.01 to 0.1 was synthesized using an in situ polymerization technique. The adsorption behavior of the neat PANI nanofiber network and the synthesized nanohybrids was examined toward anionic methyl orange (MO) dye from aqueous media. It was realized that the maximum adsorption capacity of PANI (229 mg/g) increases steadily by increasing the UiO-66 content in the nanohybrid up to 7 wt % at 426 mg/g, and then, it approximately levels off at 432 mg/g for the nanohybrid sample containing 10 wt % UiO-66, that is, UP10. Based on a thorough characterization, it was shown that UiO-66 is completely encapsulated by PANI nanofibers. Further adsorption examinations on the nanohybrids exhibited that the Langmuir isotherm model and pseudo-second-order kinetics model best describe the adsorption performance of all the prepared adsorbents during the adsorption of MO. Meanwhile, thermodynamic investigations demonstrated that the adsorption of MO onto UP10 is endothermic and spontaneous, and entropy controls the adsorption process. UP10 exhibited high selectivity indices of 100, 20, and 34 for the adsorption of MO as an anionic dye over crystal violet (CV), malachite green (MG), and methylene blue (MB), respectively, as cationic dyes. © 2022 American Chemical Society. All rights reserved
  6. Keywords:
  7. Aniline ; Aromatic compounds ; Azo dyes ; Citrus fruits ; Isotherms ; Nanofibers ; Polyaniline ; Adsorption behaviour ; Aqueous media ; Facile synthesis ; In-situ polymerization ; Methyl Orange ; Methyl orange dyes ; Nanohybrids ; Rapid adsorption ; Synthesised ; Weight ratios ; Adsorption
  8. Source: Industrial and Engineering Chemistry Research ; Volume 61, Issue 32 , Volume 61, Issue 32 , 2022 , Pages 11735-11746 ; 08885885 (ISSN)
  9. URL: https://pubs.acs.org/doi/10.1021/acs.iecr.2c00919