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Polymers
Special Issues
Conducting Polymer Composites for Water Purification
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Conducting Polymer Composites for Water Purification

A special issue of Polymers (ISSN 2073-4360). This special issue belongs to the section "Polymer Applications".

Deadline for manuscript submissions: closed (15 January 2024) | Viewed by 6678

Special Issue Editors

Dr. Islam Minisy

E-Mail Website
Guest Editor
Department of Conducting Polymers, Institute of Macromolecular Chemistry, Academy of Sciences of The Czech Republic, 16206 Prague, Czech Republic
Interests: nanofibers; film; film studies; water and wastewater treatment; green chemistry; synthetic organic chemistry; adsorption; X-ray diffraction; nanomaterials; conducting polymers
Dr. Patrycja Bober

E-Mail Website
Guest Editor
Department of Conducting Polymers, Institute of Macromolecular Chemistry, Academy of Sciences of the Czech Republic, 16206 Prague, Czech Republic
Interests: conducting polymers; composites; sensors; energy storage and conversion
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Various conducting polymers (e.g., polyaniline, polypyrrole, PEDOT, etc.) have attracted enormous attention due to their interesting physicochemical properties. They show relatively high conductivity, outstanding redox and ion-exchange capability, and reversible doping/dedoping behavior. Conducting polymers have been used in a wide spectrum of applications, and among these, wastewater treatment has shown exponential growth. Pristine conducting polymers are usually found in the form of infusible and insoluble powders with poor mechanical properties and low specific surface area. Due to this, the preparation of composites with natural or synthetic materials in different forms (e.g., films, powders, hydrogels, cryogels, etc.) can impact conducting materials, resulting in new dimensions for their practical applications.

The aim of this Special Issue is to highlight recent developments in basic and applied research on conducting polymers and their composites in the removal of organic and inorganic contaminants from wastewater. The topics of interest include but are not limited to:

  • Synthesis of conducting polymers and their composites with various functional fillers.
  • Physicochemical characterization of novel composites.
  • Application in wastewater treatment (adsorption, photocatalysis, and electrocatalysis).

It is our pleasure to invite you to submit a manuscript for this Special Issue. Full papers, communications, and reviews are all welcome. 

Dr. Islam Minisy
Dr. Patrycja Bober
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Polymers is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2700 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • conducting polymers
  • composites
  • adsorption
  • photocatalysis
  • electrocatalysis
  • organic dyes
  • wastewater
  • heavy metals
  • pharmaceuticals
  • personal care products
  • persistent organic pollutants

Published Papers (3 papers)

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Research

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15 pages, 6889 KiB  
Article
One-Step Accelerated Synthesis of Conducting Polymer/Silver Composites and Their Catalytic Reduction of Cr(VI) Ions and p-Nitrophenol
by Islam M. Minisy, Oumayma Taboubi and Jiřina Hromádková
Polymers 2023, 15(10), 2366; https://doi.org/10.3390/polym15102366 - 18 May 2023
Cited by 2 | Viewed by 1431
Abstract
In this paper, silver nitrate was used as an oxidant to prepare polyaniline, polypyrrole, and poly(3,4-ethylene dioxythiophene)/silver composites through a simultaneous oxidation/reduction process. In addition, p-phenylenediamine was added with 1 mole% relative to the concentrations of the monomers to accelerate the polymerization [...] Read more.
In this paper, silver nitrate was used as an oxidant to prepare polyaniline, polypyrrole, and poly(3,4-ethylene dioxythiophene)/silver composites through a simultaneous oxidation/reduction process. In addition, p-phenylenediamine was added with 1 mole% relative to the concentrations of the monomers to accelerate the polymerization reaction. The prepared conducting polymer/silver composites were characterized by scanning and transmission electron microscopies to study their morphologies; Fourier-transform infrared and Raman spectroscopies to confirm their molecular structures; and thermogravimetric analysis (TGA) to study their thermal stabilities. The silver content in the composites was estimated by energy-dispersive X-ray spectroscopy, ash analysis, and TGA. The conducting polymer/silver composites were utilized for the remediation of water pollutants through catalytic reduction. Hexavalent chromium ions (Cr(VI)) were photocatalytically reduced to trivalent chromium ions, and p-nitrophenol was catalytically reduced to p-aminophenol. The catalytic reduction reactions were found to follow the first-order kinetic model. Among the prepared composites, polyaniline/silver composite has shown the highest activity for the photocatalytic reduction of Cr(VI) ions with an apparent rate constant of 0.226 min–1 and efficiency of 100% within 20 min. Additionally, poly(3,4-ethylene dioxythiophene)/silver composite showed the highest catalytic activity towards the reduction of p-nitrophenol with an apparent rate constant of 0.445 min–1 and efficiency of 99.8% within 12 min. Full article
(This article belongs to the Special Issue Conducting Polymer Composites for Water Purification)
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20 pages, 6683 KiB  
Article
pH-Driven Selective Adsorption of Multi-Dyes Solutions by Loofah Sponge and Polyaniline-Modified Loofah Sponge
by Melissa G. Galloni, Veronica Bortolotto, Ermelinda Falletta and Claudia L. Bianchi
Polymers 2022, 14(22), 4897; https://doi.org/10.3390/polym14224897 - 13 Nov 2022
Cited by 10 | Viewed by 1567
Abstract
In the last decades, sorbent materials characterized by low selectivity have been developed for the removal of pollutants (in particular dyes) from wastewater. However, following the circular economy perspective, the possibility to selectively adsorb and desorb dyes molecules today represents an unavoidable challenge [...] Read more.
In the last decades, sorbent materials characterized by low selectivity have been developed for the removal of pollutants (in particular dyes) from wastewater. However, following the circular economy perspective, the possibility to selectively adsorb and desorb dyes molecules today represents an unavoidable challenge deserving to be faced. Herein, we propose a sequential treatment based on the use of PANI-modified loofah (P-LS) and loofah sponge (LS) to selectively adsorb cationic (rhodamine, RHB, and methylene blue, MB) and anionic (methyl orange, MO) dyes mixed in aqueous solution by tuning the adsorption pH (100% MO removal by P-LS and 100% and 70% abatement of MB and RHB, respectively, by LS). The system maintained high sorption activity for five consecutive cycles. A simple and effective regeneration procedure for the spent adsorbents permits the recovery of the initial sorption capability of the materials (81% for MO, ca. 85% for both RHB and MB, respectively) and, at the same time, the selective release of most of the adsorbed cationic dyes (50% of the adsorbed MB and 50% of the adsorbed RHB), although the procedure failed regarding the release of the anionic component. This approach paved the way to overcome the traditional procedure based on an indiscriminate removal/degradation of pollutants, making the industrial wastewater a potential source of useful chemicals. Full article
(This article belongs to the Special Issue Conducting Polymer Composites for Water Purification)
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Review

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22 pages, 4746 KiB  
Review
Recent Advances in the Removal of Organic Dyes from Aqueous Media with Conducting Polymers, Polyaniline and Polypyrrole, and Their Composites
by Jaroslav Stejskal
Polymers 2022, 14(19), 4243; https://doi.org/10.3390/polym14194243 - 10 Oct 2022
Cited by 21 | Viewed by 2977
Abstract
Water pollution by organic dyes, and its remediation, is an important environmental issue associated with ever-increasing scientific interest. Conducting polymers have recently come to the forefront as advanced agents for removing dye. The present review reports on the progress represented by the literature [...] Read more.
Water pollution by organic dyes, and its remediation, is an important environmental issue associated with ever-increasing scientific interest. Conducting polymers have recently come to the forefront as advanced agents for removing dye. The present review reports on the progress represented by the literature published in 2020–2022 on the application of conducting polymers and their composites in the removal of dyes from aqueous media. Two composites, incorporating the most important polymers, polyaniline, and polypyrrole, have been used as efficient dye adsorbents or photocatalysts of dye decomposition. The recent application trends are outlined, and future uses also exploiting the electrical and electrochemical properties of conducting polymers are offered. Full article
(This article belongs to the Special Issue Conducting Polymer Composites for Water Purification)
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