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Synergistic ternary polypyrrole/WO3/MWCNT nanocomposites for environmental remediation and electrochemical water splitting.

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Title: Synergistic ternary polypyrrole/WO3/MWCNT nanocomposites for environmental remediation and electrochemical water splitting.
Authors: Ahmad, Nafees1, Kumar, Greesh2, Faridi, Irfanul Haq3, Dey, Ramendra Sundar2 rsdey@inst.ac.in
Source: Dalton Transactions: An International Journal of Inorganic Chemistry. 3/3/2026, Vol. 55 Issue 9, p3814-3827. 14p.
Subjects: Nanocomposite materials, Environmental remediation, Multiwalled carbon nanotubes, Photocatalysis, Water electrolysis, Tungsten trioxide, Polypyrrole, Hydrogen evolution reactions
Abstract: The development of cost-effective and multifunctional nanocatalysts is essential to address pressing environmental and energy challenges, particularly organic pollutant removal and sustainable hydrogen production. Herein, we report a ternary nanocomposite comprising polypyrrole (PPy), tungsten trioxide (WO3), and multiwalled carbon nanotubes (MWCNTs), synthesized and evaluated for dual catalytic applications. The PPy/WO3/MWCNT composite exhibited remarkable photocatalytic activity toward the degradation of Ponceau BS (PBS) dye under visible light, achieving 98.2% degradation within 40 min following first order kinetics. Adsorption kinetics and isotherm analyses indicated monolayer adsorption behavior with a maximum capacity of 124.6 mg g-1, well described by the Langmuir model (R² = 0.99). The heterojunction between PPy and WO3 facilitated efficient charge separation, active sites and extended light absorption, while MWCNTs provided conductive pathways and electron reservoirs. Beyond photocatalysis, the composite demonstrated outstanding electrocatalytic activity for overall water splitting in alkaline media, requiring an overpotential of only 146 mV for the hydrogen evolution reaction (HER) and 328 mV for the oxygen evolution reaction (OER) to achieve 10 mA cm-2. The superior performance is attributed to the synergistic combination of high surface area, enhanced charge transfer kinetics, and multiple redox-active sites. Furthermore, the nanocomposite exhibited excellent long-term stability under both HER and OER conditions, highlighting its promise as a sustainable multifunctional catalyst for environmental remediation and clean energy conversion. [ABSTRACT FROM AUTHOR]
Copyright of Dalton Transactions: An International Journal of Inorganic Chemistry is the property of Royal Society of Chemistry 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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DbLabel: Engineering Source
An: 192058919
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  Data: Synergistic ternary polypyrrole/WO<subscript>3</subscript>/MWCNT nanocomposites for environmental remediation and electrochemical water splitting.
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  Data: <searchLink fieldCode="AR" term="%22Ahmad%2C+Nafees%22">Ahmad, Nafees</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Kumar%2C+Greesh%22">Kumar, Greesh</searchLink><relatesTo>2</relatesTo><br /><searchLink fieldCode="AR" term="%22Faridi%2C+Irfanul+Haq%22">Faridi, Irfanul Haq</searchLink><relatesTo>3</relatesTo><br /><searchLink fieldCode="AR" term="%22Dey%2C+Ramendra+Sundar%22">Dey, Ramendra Sundar</searchLink><relatesTo>2</relatesTo><i> rsdey@inst.ac.in</i>
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  Data: <searchLink fieldCode="JN" term="%22Dalton+Transactions%3A+An+International+Journal+of+Inorganic+Chemistry%22">Dalton Transactions: An International Journal of Inorganic Chemistry</searchLink>. 3/3/2026, Vol. 55 Issue 9, p3814-3827. 14p.
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  Data: <searchLink fieldCode="DE" term="%22Nanocomposite+materials%22">Nanocomposite materials</searchLink><br /><searchLink fieldCode="DE" term="%22Environmental+remediation%22">Environmental remediation</searchLink><br /><searchLink fieldCode="DE" term="%22Multiwalled+carbon+nanotubes%22">Multiwalled carbon nanotubes</searchLink><br /><searchLink fieldCode="DE" term="%22Photocatalysis%22">Photocatalysis</searchLink><br /><searchLink fieldCode="DE" term="%22Water+electrolysis%22">Water electrolysis</searchLink><br /><searchLink fieldCode="DE" term="%22Tungsten+trioxide%22">Tungsten trioxide</searchLink><br /><searchLink fieldCode="DE" term="%22Polypyrrole%22">Polypyrrole</searchLink><br /><searchLink fieldCode="DE" term="%22Hydrogen+evolution+reactions%22">Hydrogen evolution reactions</searchLink>
– Name: Abstract
  Label: Abstract
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  Data: The development of cost-effective and multifunctional nanocatalysts is essential to address pressing environmental and energy challenges, particularly organic pollutant removal and sustainable hydrogen production. Herein, we report a ternary nanocomposite comprising polypyrrole (PPy), tungsten trioxide (WO3), and multiwalled carbon nanotubes (MWCNTs), synthesized and evaluated for dual catalytic applications. The PPy/WO3/MWCNT composite exhibited remarkable photocatalytic activity toward the degradation of Ponceau BS (PBS) dye under visible light, achieving 98.2% degradation within 40 min following first order kinetics. Adsorption kinetics and isotherm analyses indicated monolayer adsorption behavior with a maximum capacity of 124.6 mg g-1, well described by the Langmuir model (R² = 0.99). The heterojunction between PPy and WO3 facilitated efficient charge separation, active sites and extended light absorption, while MWCNTs provided conductive pathways and electron reservoirs. Beyond photocatalysis, the composite demonstrated outstanding electrocatalytic activity for overall water splitting in alkaline media, requiring an overpotential of only 146 mV for the hydrogen evolution reaction (HER) and 328 mV for the oxygen evolution reaction (OER) to achieve 10 mA cm-2. The superior performance is attributed to the synergistic combination of high surface area, enhanced charge transfer kinetics, and multiple redox-active sites. Furthermore, the nanocomposite exhibited excellent long-term stability under both HER and OER conditions, highlighting its promise as a sustainable multifunctional catalyst for environmental remediation and clean energy conversion. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Dalton Transactions: An International Journal of Inorganic Chemistry is the property of Royal Society of Chemistry 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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RecordInfo BibRecord:
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    Identifiers:
      – Type: doi
        Value: 10.1039/d5dt02347e
    Languages:
      – Code: eng
        Text: English
    PhysicalDescription:
      Pagination:
        PageCount: 14
        StartPage: 3814
    Subjects:
      – SubjectFull: Nanocomposite materials
        Type: general
      – SubjectFull: Environmental remediation
        Type: general
      – SubjectFull: Multiwalled carbon nanotubes
        Type: general
      – SubjectFull: Photocatalysis
        Type: general
      – SubjectFull: Water electrolysis
        Type: general
      – SubjectFull: Tungsten trioxide
        Type: general
      – SubjectFull: Polypyrrole
        Type: general
      – SubjectFull: Hydrogen evolution reactions
        Type: general
    Titles:
      – TitleFull: Synergistic ternary polypyrrole/WO3/MWCNT nanocomposites for environmental remediation and electrochemical water splitting.
        Type: main
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      – PersonEntity:
          Name:
            NameFull: Ahmad, Nafees
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            NameFull: Kumar, Greesh
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            NameFull: Faridi, Irfanul Haq
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            NameFull: Dey, Ramendra Sundar
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          Dates:
            – D: 03
              M: 03
              Text: 3/3/2026
              Type: published
              Y: 2026
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              Value: 14779226
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              Value: 55
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              Value: 9
          Titles:
            – TitleFull: Dalton Transactions: An International Journal of Inorganic Chemistry
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