Green-Synthesized Nanomaterials for Catalytic Reduction of para-Nitrophenol and Methylene Blue: Recent Advances and Perspectives.

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Title: Green-Synthesized Nanomaterials for Catalytic Reduction of para-Nitrophenol and Methylene Blue: Recent Advances and Perspectives.
Authors: Soni, Himanshi1,2 (AUTHOR), Bhattu, Monika2 (AUTHOR), Bechelany, Mikhael3 (AUTHOR), Singh, Jagpreet1,2 (AUTHOR) jagpreetnano@gmail.com
Source: Nanomaterials (2079-4991). Mar2026, Vol. 16 Issue 6, p362. 21p.
Subjects: Catalytic reduction, Wastewater treatment, Sustainable development, Nitrophenols, Nanostructured materials, Methylene blue, Circular economy, Sustainable chemistry
Abstract: Nitrophenol (NP) and methylene blue (MB) are considered among the most hazardous organic contaminants frequently released from pharmaceutical, textile, and paper industries, posing significant risks to both human health and the environment. The conventional treatment involves adsorption, oxidation, biological, filtration, and other photochemical degradation methods, which often suffer from low efficiency, limited reusability, and the production of secondary toxic by-products. In this context, the nanomaterials (NMs) mediated catalytic reduction of MB into leucomethylene blue and p-NP into p-aminophenol (p-AP) has emerged as a promising approach, due to its high efficiency and effectiveness. This review emphasizes the green synthesis of NMs for catalytic applications, which align with the principles of the circular economy and the Sustainable Development Goals (SDGs). This thorough review systematically examines the mechanistic understanding of the reduction of both p-NP and MB via different green synthesized NMs and evaluating their catalytic efficiencies. Furthermore, a detailed discussion of the reduction of pollutants (p-NP and MB) is provided, along with their mechanistic insights. In addition, this paper also provides a comparative table highlighting the effects of using different precursors, experimental conditions on the conversion catalytic efficiency and reusability potency. Thus, this work provides the insights into recent research on the catalytic reduction of p-NP and MB into valuable products, highlighting the significance of green synthesized nanocatalysts for effective wastewater treatment. [ABSTRACT FROM AUTHOR]
Copyright of Nanomaterials (2079-4991) is the property of MDPI 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
  Group: Ti
  Data: Green-Synthesized Nanomaterials for Catalytic Reduction of para-Nitrophenol and Methylene Blue: Recent Advances and Perspectives.
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  Data: <searchLink fieldCode="AR" term="%22Soni%2C+Himanshi%22">Soni, Himanshi</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Bhattu%2C+Monika%22">Bhattu, Monika</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Bechelany%2C+Mikhael%22">Bechelany, Mikhael</searchLink><relatesTo>3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Singh%2C+Jagpreet%22">Singh, Jagpreet</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<i> jagpreetnano@gmail.com</i>
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  Data: <searchLink fieldCode="JN" term="%22Nanomaterials+%282079-4991%29%22">Nanomaterials (2079-4991)</searchLink>. Mar2026, Vol. 16 Issue 6, p362. 21p.
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  Data: <searchLink fieldCode="DE" term="%22Catalytic+reduction%22">Catalytic reduction</searchLink><br /><searchLink fieldCode="DE" term="%22Wastewater+treatment%22">Wastewater treatment</searchLink><br /><searchLink fieldCode="DE" term="%22Sustainable+development%22">Sustainable development</searchLink><br /><searchLink fieldCode="DE" term="%22Nitrophenols%22">Nitrophenols</searchLink><br /><searchLink fieldCode="DE" term="%22Nanostructured+materials%22">Nanostructured materials</searchLink><br /><searchLink fieldCode="DE" term="%22Methylene+blue%22">Methylene blue</searchLink><br /><searchLink fieldCode="DE" term="%22Circular+economy%22">Circular economy</searchLink><br /><searchLink fieldCode="DE" term="%22Sustainable+chemistry%22">Sustainable chemistry</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Nitrophenol (NP) and methylene blue (MB) are considered among the most hazardous organic contaminants frequently released from pharmaceutical, textile, and paper industries, posing significant risks to both human health and the environment. The conventional treatment involves adsorption, oxidation, biological, filtration, and other photochemical degradation methods, which often suffer from low efficiency, limited reusability, and the production of secondary toxic by-products. In this context, the nanomaterials (NMs) mediated catalytic reduction of MB into leucomethylene blue and p-NP into p-aminophenol (p-AP) has emerged as a promising approach, due to its high efficiency and effectiveness. This review emphasizes the green synthesis of NMs for catalytic applications, which align with the principles of the circular economy and the Sustainable Development Goals (SDGs). This thorough review systematically examines the mechanistic understanding of the reduction of both p-NP and MB via different green synthesized NMs and evaluating their catalytic efficiencies. Furthermore, a detailed discussion of the reduction of pollutants (p-NP and MB) is provided, along with their mechanistic insights. In addition, this paper also provides a comparative table highlighting the effects of using different precursors, experimental conditions on the conversion catalytic efficiency and reusability potency. Thus, this work provides the insights into recent research on the catalytic reduction of p-NP and MB into valuable products, highlighting the significance of green synthesized nanocatalysts for effective wastewater treatment. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Nanomaterials (2079-4991) is the property of MDPI 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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      – Type: doi
        Value: 10.3390/nano16060362
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      – Code: eng
        Text: English
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      Pagination:
        PageCount: 21
        StartPage: 362
    Subjects:
      – SubjectFull: Catalytic reduction
        Type: general
      – SubjectFull: Wastewater treatment
        Type: general
      – SubjectFull: Sustainable development
        Type: general
      – SubjectFull: Nitrophenols
        Type: general
      – SubjectFull: Nanostructured materials
        Type: general
      – SubjectFull: Methylene blue
        Type: general
      – SubjectFull: Circular economy
        Type: general
      – SubjectFull: Sustainable chemistry
        Type: general
    Titles:
      – TitleFull: Green-Synthesized Nanomaterials for Catalytic Reduction of para-Nitrophenol and Methylene Blue: Recent Advances and Perspectives.
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            NameFull: Soni, Himanshi
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            NameFull: Bhattu, Monika
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            NameFull: Bechelany, Mikhael
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            NameFull: Singh, Jagpreet
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              Text: Mar2026
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              Y: 2026
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