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A Highly Efficient Graphene-Based Material for the Removal of Cationic Dyes from Aqueous Solutions.

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Title: A Highly Efficient Graphene-Based Material for the Removal of Cationic Dyes from Aqueous Solutions.
Authors: Vassileva, Paunka1 (AUTHOR), Voykova, Dimitrinka1 (AUTHOR), Kichukova, Diana1 (AUTHOR), Lazarova, Tsvetomila1 (AUTHOR), Atanasova, Genoveva1 (AUTHOR), Kovacheva, Daniela1 (AUTHOR), Spassova, Ivanka1 (AUTHOR) ispasova@svr.igic.bas.bg
Source: Materials (1996-1944). Feb2025, Vol. 18 Issue 4, p853. 20p.
Subjects: Basic dyes, Toluidine blue, Graphene oxide, Adsorption capacity, Electrostatic interaction, Gentian violet, Sorbents
Abstract: Graphene materials and their derivatives have shown promising capabilities in removing anionic and cationic dyes from wastewater. The present study aims at the synthesis of graphene-based material with a high specific surface area and evaluates its use as an adsorbent for removing toluidine blue and methyl violet from aqueous solutions. The physicochemical characterization of the adsorbent before and after dye adsorption is made by XRD, Raman spectroscopy, SEM, TEM, nitrogen physisorption, TG-DTA, and XPS. The influence of the solution's pH, contact time, dye concentration, and temperature on the adsorption efficiency is investigated. The adsorbent demonstrated high adsorption capacity towards toluidine blue (265.2 mg.g−1) and methyl violet (200.4 mg.g−1) dyes from water. The adsorption process for both dyes follows the Langmuir model and involves physical rather than chemical interactions. Kinetic parameters were also determined. The adsorption of the studied cationic dyes can be attributed to a combination of mechanisms, including electrostatic interactions, hydrogen bonding, and π-π interactions between the dye molecules and the aromatic structure of reduced graphene oxide. The findings in the present work highlight the possibilities for enhancing graphene-based materials' adsorption capabilities. [ABSTRACT FROM AUTHOR]
Copyright of Materials (1996-1944) 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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Header DbId: egs
DbLabel: Engineering Source
An: 183288559
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PubTypeId: academicJournal
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  Data: A Highly Efficient Graphene-Based Material for the Removal of Cationic Dyes from Aqueous Solutions.
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  Data: <searchLink fieldCode="AR" term="%22Vassileva%2C+Paunka%22">Vassileva, Paunka</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Voykova%2C+Dimitrinka%22">Voykova, Dimitrinka</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Kichukova%2C+Diana%22">Kichukova, Diana</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Lazarova%2C+Tsvetomila%22">Lazarova, Tsvetomila</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Atanasova%2C+Genoveva%22">Atanasova, Genoveva</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Kovacheva%2C+Daniela%22">Kovacheva, Daniela</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Spassova%2C+Ivanka%22">Spassova, Ivanka</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> ispasova@svr.igic.bas.bg</i>
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  Data: <searchLink fieldCode="JN" term="%22Materials+%281996-1944%29%22">Materials (1996-1944)</searchLink>. Feb2025, Vol. 18 Issue 4, p853. 20p.
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  Data: <searchLink fieldCode="DE" term="%22Basic+dyes%22">Basic dyes</searchLink><br /><searchLink fieldCode="DE" term="%22Toluidine+blue%22">Toluidine blue</searchLink><br /><searchLink fieldCode="DE" term="%22Graphene+oxide%22">Graphene oxide</searchLink><br /><searchLink fieldCode="DE" term="%22Adsorption+capacity%22">Adsorption capacity</searchLink><br /><searchLink fieldCode="DE" term="%22Electrostatic+interaction%22">Electrostatic interaction</searchLink><br /><searchLink fieldCode="DE" term="%22Gentian+violet%22">Gentian violet</searchLink><br /><searchLink fieldCode="DE" term="%22Sorbents%22">Sorbents</searchLink>
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  Data: Graphene materials and their derivatives have shown promising capabilities in removing anionic and cationic dyes from wastewater. The present study aims at the synthesis of graphene-based material with a high specific surface area and evaluates its use as an adsorbent for removing toluidine blue and methyl violet from aqueous solutions. The physicochemical characterization of the adsorbent before and after dye adsorption is made by XRD, Raman spectroscopy, SEM, TEM, nitrogen physisorption, TG-DTA, and XPS. The influence of the solution's pH, contact time, dye concentration, and temperature on the adsorption efficiency is investigated. The adsorbent demonstrated high adsorption capacity towards toluidine blue (265.2 mg.g−1) and methyl violet (200.4 mg.g−1) dyes from water. The adsorption process for both dyes follows the Langmuir model and involves physical rather than chemical interactions. Kinetic parameters were also determined. The adsorption of the studied cationic dyes can be attributed to a combination of mechanisms, including electrostatic interactions, hydrogen bonding, and π-π interactions between the dye molecules and the aromatic structure of reduced graphene oxide. The findings in the present work highlight the possibilities for enhancing graphene-based materials' adsorption capabilities. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Materials (1996-1944) 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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        Value: 10.3390/ma18040853
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      – Code: eng
        Text: English
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        PageCount: 20
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      – SubjectFull: Basic dyes
        Type: general
      – SubjectFull: Toluidine blue
        Type: general
      – SubjectFull: Graphene oxide
        Type: general
      – SubjectFull: Adsorption capacity
        Type: general
      – SubjectFull: Electrostatic interaction
        Type: general
      – SubjectFull: Gentian violet
        Type: general
      – SubjectFull: Sorbents
        Type: general
    Titles:
      – TitleFull: A Highly Efficient Graphene-Based Material for the Removal of Cationic Dyes from Aqueous Solutions.
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            NameFull: Vassileva, Paunka
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            NameFull: Voykova, Dimitrinka
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            NameFull: Kichukova, Diana
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            NameFull: Lazarova, Tsvetomila
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            – D: 15
              M: 02
              Text: Feb2025
              Type: published
              Y: 2025
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              Value: 18
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            – TitleFull: Materials (1996-1944)
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