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Nanoparticle-loaded polyaniline-chitosan composites for efficient removal of rose bengal: Synthesis, characterization and adsorption performance.

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Title: Nanoparticle-loaded polyaniline-chitosan composites for efficient removal of rose bengal: Synthesis, characterization and adsorption performance.
Authors: Al-Otaibi, Muteb F.1 (AUTHOR), Riyad, Yasser M.1,2 (AUTHOR) yasser.riyad@iu.edu.sa, Masoud, Emad M.1 (AUTHOR) emad.youssef@iu.edu.sa, Popoola, Saheed A.1 (AUTHOR) abiodun@iu.edu.sa
Source: Polymers & Polymer Composites. 6/13/2026, Vol. 34, p1-25. 25p.
Subjects: Rose bengal, Titanium dioxide, Environmental remediation, Adsorption kinetics, Surface coatings, Composite materials, Nanocomposite materials, Color removal (Sewage purification)
Abstract: This study introduces a novel polyaniline–chitosan/nano TiO2 composite (PAn-CS) synthesized through nanoparticle-incorporating to modify surface features, thereby improving its ability to adsorb and remove anionic rose Bengal (RB) dye. The composite was produced by incorporating TiO2, SiO2, or ZrO2 nanoparticles into the PAn-CS composite using chemical oxidation via a single-stage precipitation procedure. Analysis of the structural and morphological characteristics was carried out with X-ray diffraction, Fourier-transform infrared and scanning electron microscopy. The composites' thermal stability, surface properties, and surface charge of composites were also evaluated. The adsorption process was investigated through kinetics, isotherms, thermodynamics, and mechanistic insights. Results indicated that adding nano-oxides enhanced the PAn-CS composite's affinity for RB removal. Optimal TiO2-content at 10% wt. howed a maximum adsorption efficiency of 96% within 60 minutes at 25oC and pH 4, with a 0.025 g adsorbent dose and an initial dye concentration of 25 mg/L. Notably, the PAn-CS/TiO2 composite demonstrated the highest RB adsorption capacity of 643.62 mgg-1. The adsorption data were well fitted by the pseudo-second-order kinetic model, suggesting chemisorptions as the primary mechanism. The adsorption involved electrostatic, hydrogen bonds, and π-π interactions. The composite also showed excellent stability and reusability over five cycles, highlighting its potential for practical and sustainable dye-removal applications. [ABSTRACT FROM AUTHOR]
Copyright of Polymers & Polymer Composites is the property of Sage Publications Inc. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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  Label: Title
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  Data: Nanoparticle-loaded polyaniline-chitosan composites for efficient removal of rose bengal: Synthesis, characterization and adsorption performance.
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  Data: <searchLink fieldCode="AR" term="%22Al-Otaibi%2C+Muteb+F%2E%22">Al-Otaibi, Muteb F.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Riyad%2C+Yasser+M%2E%22">Riyad, Yasser M.</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<i> yasser.riyad@iu.edu.sa</i><br /><searchLink fieldCode="AR" term="%22Masoud%2C+Emad+M%2E%22">Masoud, Emad M.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> emad.youssef@iu.edu.sa</i><br /><searchLink fieldCode="AR" term="%22Popoola%2C+Saheed+A%2E%22">Popoola, Saheed A.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> abiodun@iu.edu.sa</i>
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  Data: <searchLink fieldCode="JN" term="%22Polymers+%26+Polymer+Composites%22">Polymers & Polymer Composites</searchLink>. 6/13/2026, Vol. 34, p1-25. 25p.
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  Data: <searchLink fieldCode="DE" term="%22Rose+bengal%22">Rose bengal</searchLink><br /><searchLink fieldCode="DE" term="%22Titanium+dioxide%22">Titanium dioxide</searchLink><br /><searchLink fieldCode="DE" term="%22Environmental+remediation%22">Environmental remediation</searchLink><br /><searchLink fieldCode="DE" term="%22Adsorption+kinetics%22">Adsorption kinetics</searchLink><br /><searchLink fieldCode="DE" term="%22Surface+coatings%22">Surface coatings</searchLink><br /><searchLink fieldCode="DE" term="%22Composite+materials%22">Composite materials</searchLink><br /><searchLink fieldCode="DE" term="%22Nanocomposite+materials%22">Nanocomposite materials</searchLink><br /><searchLink fieldCode="DE" term="%22Color+removal+%28Sewage+purification%29%22">Color removal (Sewage purification)</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: This study introduces a novel polyaniline–chitosan/nano TiO2 composite (PAn-CS) synthesized through nanoparticle-incorporating to modify surface features, thereby improving its ability to adsorb and remove anionic rose Bengal (RB) dye. The composite was produced by incorporating TiO2, SiO2, or ZrO2 nanoparticles into the PAn-CS composite using chemical oxidation via a single-stage precipitation procedure. Analysis of the structural and morphological characteristics was carried out with X-ray diffraction, Fourier-transform infrared and scanning electron microscopy. The composites' thermal stability, surface properties, and surface charge of composites were also evaluated. The adsorption process was investigated through kinetics, isotherms, thermodynamics, and mechanistic insights. Results indicated that adding nano-oxides enhanced the PAn-CS composite's affinity for RB removal. Optimal TiO2-content at 10% wt. howed a maximum adsorption efficiency of 96% within 60 minutes at 25oC and pH 4, with a 0.025 g adsorbent dose and an initial dye concentration of 25 mg/L. Notably, the PAn-CS/TiO2 composite demonstrated the highest RB adsorption capacity of 643.62 mgg-1. The adsorption data were well fitted by the pseudo-second-order kinetic model, suggesting chemisorptions as the primary mechanism. The adsorption involved electrostatic, hydrogen bonds, and π-π interactions. The composite also showed excellent stability and reusability over five cycles, highlighting its potential for practical and sustainable dye-removal applications. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Polymers & Polymer Composites is the property of Sage Publications Inc. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1177/09673911261452535
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      – Code: eng
        Text: English
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        PageCount: 25
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      – SubjectFull: Rose bengal
        Type: general
      – SubjectFull: Titanium dioxide
        Type: general
      – SubjectFull: Environmental remediation
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      – SubjectFull: Adsorption kinetics
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      – SubjectFull: Surface coatings
        Type: general
      – SubjectFull: Composite materials
        Type: general
      – SubjectFull: Nanocomposite materials
        Type: general
      – SubjectFull: Color removal (Sewage purification)
        Type: general
    Titles:
      – TitleFull: Nanoparticle-loaded polyaniline-chitosan composites for efficient removal of rose bengal: Synthesis, characterization and adsorption performance.
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            NameFull: Al-Otaibi, Muteb F.
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            NameFull: Riyad, Yasser M.
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            NameFull: Masoud, Emad M.
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            – D: 13
              M: 06
              Text: 6/13/2026
              Type: published
              Y: 2026
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