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<p>The adsorption process for controlling water pollution and treating aqueous wastewater has emerged as an attractive area of applied research. Herein, the Cu metal-organic framework (MOF) grafted on eco-friendly Polyaniline polymer (PANI) (tagged as Cu-MOF@PANI nanocomposite) was fabricated by one-pot solvothermal method. The potential of Cu-MOF@PANI adsorbent to effectively remove anionic food dyes, namely Sunset Yellow (E110) and Tartrazine (E102), was explored. The PANI enhanced the surface area of the Cu-MOF@PANI adsorbent to 489.7 m<sup>2</sup>/g, thereby improving the capture performance of anionic dyes. The nanocomposite demonstrated a remarkably high adsorption capacity of 696.6&#xa0;mg/g and 649.3&#xa0;mg/g for Sunset Yellow and Tartrazine, respectively, attributable to the synergistic effect of the electronic properties, π–π interaction, and electrostatic forces of the PANI modifier, in conjunction with the distinctive porous structure of Cu-MOF. Furthermore, the synergistic effect of the PANI component and Cu-MOF achieved removal efficiencies of 99% and 97% for Sunset Yellow and Tartrazine within 20&#xa0;min and 25&#xa0;min, respectively. A classic adsorption study demonstrated that the nonlinear form of the pseudo-second-order (PSO) kinetic model provided a satisfactory description of dye contaminants onto the Cu-MOF@PANI adsorbent. The isotherm study using Langmuir, Freundlich, Sips, and Temkin isotherm equations established a strong correlation with the Sips isotherm for the capture of dye contaminants. Based on thermodynamic parameters, the adsorption process on the Cu-MOF@PANI nanocomposite was found to be endothermic. The research findings indicated that MOF-based composites have considerable potential for treating wastewater containing organic dyes.</p>

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Synergistic effect of Cu metal-organic framework grafted polyaniline (Cu-MOF@PANI) on adsorptive removal of anionic dye

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年7月20日

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  • Tahereh Mohammadi,
  • Amirpouya Salmasi,
  • Ahad Moradgholi,
  • Amirvahab Vahabzadeh,
  • Aligholi Niaei

摘要

The adsorption process for controlling water pollution and treating aqueous wastewater has emerged as an attractive area of applied research. Herein, the Cu metal-organic framework (MOF) grafted on eco-friendly Polyaniline polymer (PANI) (tagged as Cu-MOF@PANI nanocomposite) was fabricated by one-pot solvothermal method. The potential of Cu-MOF@PANI adsorbent to effectively remove anionic food dyes, namely Sunset Yellow (E110) and Tartrazine (E102), was explored. The PANI enhanced the surface area of the Cu-MOF@PANI adsorbent to 489.7 m2/g, thereby improving the capture performance of anionic dyes. The nanocomposite demonstrated a remarkably high adsorption capacity of 696.6 mg/g and 649.3 mg/g for Sunset Yellow and Tartrazine, respectively, attributable to the synergistic effect of the electronic properties, π–π interaction, and electrostatic forces of the PANI modifier, in conjunction with the distinctive porous structure of Cu-MOF. Furthermore, the synergistic effect of the PANI component and Cu-MOF achieved removal efficiencies of 99% and 97% for Sunset Yellow and Tartrazine within 20 min and 25 min, respectively. A classic adsorption study demonstrated that the nonlinear form of the pseudo-second-order (PSO) kinetic model provided a satisfactory description of dye contaminants onto the Cu-MOF@PANI adsorbent. The isotherm study using Langmuir, Freundlich, Sips, and Temkin isotherm equations established a strong correlation with the Sips isotherm for the capture of dye contaminants. Based on thermodynamic parameters, the adsorption process on the Cu-MOF@PANI nanocomposite was found to be endothermic. The research findings indicated that MOF-based composites have considerable potential for treating wastewater containing organic dyes.