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Nanostructured Materials Used for Catalytic Treatment of Hazardous Organic Dye...
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Nanostructured Materials Used for Catalytic Treatment of Hazardous Organic Dye Polluted Wastewater

A special issue of Catalysts (ISSN 2073-4344). This special issue belongs to the section "Nanostructured Catalysts".

Deadline for manuscript submissions: closed (31 October 2023) | Viewed by 6717

Special Issue Editors

Dr. Madjid Arab

E-Mail Website
Guest Editor
IM2NP, University of Toulon, LaGarde, France
Interests: development of nanomaterials for environmental applications: detection and transformation of pollutants into clean by-products; nanomaterials; nanostructuration; gas sensor; heterogeneous catalysis; organic dye decomposition; solar photocatalysis; CO2 reduction; methane oxidation; electrical and optical properties
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Hassan Ait Ahsaine

E-Mail Website
Guest Editor
Laboratoire de Chimie Appliquée des Matériaux, Faculty of Sciences, Mohammed V University in Rabat, Rabat 1014, Morocco
Interests: materials science; environmental science; chemistry; chemical engineering
Special Issues, Collections and Topics in MDPI journals
Dr. Virginie Chevallier

E-Mail Website
Guest Editor
Institut Matériaux Microélectronique et Nanosciences de Provence, Université de Toulon, Aix Marseille Université, IM2NP UMR CNRS, Toulon, France
Interests: nanomaterials; nano structuration; plasmonic nanoparticles; dye decomposition; solar photocatalysis

Special Issue Information

Dear Colleagues,

In recent years, functional materials in the shape of nanoparticles have been widely studied and developed, and successfully used for pollution removal and environmental applications. Wastewater pollution is considered as one of the most prominent issues of global public health. Nearly one-third of the population around the world has no access to clean water while the more developed countries have to handle new water treatment issues mainly due to the textile industry, and pharmaceutical and agricultural wastes. Among the water pollutants, dyes are an important class of pollutants discharged into wastewaters from textile, dyeing, and other industrial processes. Currently, removal of these dye pollutants from water sources are vital and important due to their toxicity impact on humans, animals, and plants. Several approaches have been developed to remove organic dyes from the natural environment. Over the past few years, there has been an enormous amount of research with advanced oxidation processes (AOPs) as an effective method of wastewater treatment. Among AOPs, the heterogeneous photocatalytic process appears as the most efficient technology because they are ecofriendly, economic, and capable of degrading many dyes or organic pollutants. Recently, degradation of pollutants in aqueous solution based on nanoparticle catalysts has become an effective approach to address those issues.

This Special Issue aims to attract high-quality short communications, original research papers, and review articles about the recent advances, developments and existing challenges linked to the use of nanoparticles and nanocomposites catalysts in the treatment of hazardous organic dye polluted wastewater. Articles that highlight oxide and metal nanomaterials synthesis, and related properties (transport, optical, micro-structural, morphological, nanostructuring, …) are of particular interest. Theoretical papers about organic dye decomposition, including reaction mechanisms and crucial parameters, will also be taken into consideration.

Dr. Madjid Arab
Prof. Dr. Hassan Ait Ahsaine
Dr. Virginie Chevallier
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. Catalysts is an international peer-reviewed open access monthly 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

  • nanoparticles
  • catalysts synthesis
  • nanostructures
  • hazardous organic dye
  • advanced oxidation processes
  • photocatalysis and electrochemical
  • mechanism and efficiency
  • pollutant degradation pathway

Published Papers (5 papers)

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Research

16 pages, 15264 KiB  
Article
Dyes Degradation Using Cooper-Nickel Ferrite and Its Tunable Structural and Photocatalytic Properties
by Ila Gabriele Diniz Dias de Azevedo, Marco Antonio Morales Torres, Carlson Pereira de Souza and André Luis Lopes Moriyama
Catalysts 2024, 14(1), 73; https://doi.org/10.3390/catal14010073 - 17 Jan 2024
Viewed by 816
Abstract
Water pollution is a serious worldwide problem. Among its pollutants, dyes that are overused by various types of industries and are resistant to conventional effluent treatments stand out. In this study, mixed copper and nickel ferrites NixCu(1-x)Fe2O [...] Read more.
Water pollution is a serious worldwide problem. Among its pollutants, dyes that are overused by various types of industries and are resistant to conventional effluent treatments stand out. In this study, mixed copper and nickel ferrites NixCu(1-x)Fe2O4 (x = 0, 0.2, 0.4, 0.6, 0.8 e 1.0), were produced by the EDTA-Citrate complexation method, characterized and applied in photocatalysis with methylene blue (MB) and rhodamine B (RhB) dyes, varying the reaction pH between 2, 6 and 10. The ferrites with the highest percentages of copper had a tetragonal structure, while those with the highest percentages of nickel had a cubic structure, all with inverse spinel and all presenting bandgap values lower than 2 eV. Samples with higher percentages of copper (x = 0 and 0.2) at pH 10 showed degradation of approximately 55% for RhB and 40% for MB. A mixture of MB and RhB was also evaluated, showing a greater removal of methylene blue due to its preferential adsorption on the surface of the material. In this way, mixed copper and nickel ferrites proved promising as catalysts in photocatalytic processes. Full article
(This article belongs to the Special Issue Nanostructured Materials Used for Catalytic Treatment of Hazardous Organic Dye Polluted Wastewater)
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26 pages, 5987 KiB  
Article
Plasmonic Photocatalysts Based on Au Nanoparticles and WO3 for Visible Light-Induced Photocatalytic Activity
by Margaux Desseigne, Virginie Chevallier, Véronique Madigou, Marie-Vanessa Coulet, Olivier Heintz, Hassan Ait Ahsaine and Madjid Arab
Catalysts 2023, 13(10), 1333; https://doi.org/10.3390/catal13101333 - 29 Sep 2023
Cited by 2 | Viewed by 1179
Abstract
In this work, we report the application of Au/WO3 composite as a photocatalyst for the degradation of dyes under solar light irradiation. Au/WO3 nanocomposites were synthesized using an acid precipitation method followed by an impregnation/reduction at room temperature. Two composites were [...] Read more.
In this work, we report the application of Au/WO3 composite as a photocatalyst for the degradation of dyes under solar light irradiation. Au/WO3 nanocomposites were synthesized using an acid precipitation method followed by an impregnation/reduction at room temperature. Two composites were obtained by loading gold nanoparticles on two morphologies of nanostructured WO3, nanoplatelets (NP), and pseudospheres (PS). The elaboration parameters of the nanocomposites were optimized according to the gold mass percentage, the HAuCl4 precursor concentration, and the impregnation time. The structural, microstructural, and textural characterization were conducted using advanced techniques: XRD, SEM/TEM microscopies, and XPS and DRS spectroscopies. The optimal synthesis parameters are a 48 h impregnation of a five mass percentage of gold from a HAuCl4 precursor with a concentration of 10−3 mol·L−1. The obtained composites were formed with Au nanoparticles of 7 nm in size. The XRD analyses did not reveal any modification of the oxide supports structure after gold grafting, contrary to the sorption analyses, which evidenced a change in the state of the materials surface. XPS analysis revealed the reduction of W6+ ions into W5+, favoring the presence of oxygen vacancies. Furthermore, a localized surface plasmon resonance effect was observed in the composite at 540 nm. The photocatalysis results of several dye pollutants have shown a selective degradation efficiency depending on the charge of the polluting molecules, pH medium, and mass loading of the catalysts. At the native pH, the photocatalysis process is highly efficient on a cationic molecule, with a low adsorption capacity. Au/WO3 PS composite appears to be the most efficient, degrading almost the whole RhB and MB only in 60 min and 90 min, respectively, while, for the MO anionic dye, the degradation is more efficient in acidic medium (80%) than in basic medium (0%). Trap tests of the main active species were investigated and a photodecomposition mechanism is proposed. Full article
(This article belongs to the Special Issue Nanostructured Materials Used for Catalytic Treatment of Hazardous Organic Dye Polluted Wastewater)
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16 pages, 2665 KiB  
Article
NiO/AC Active Electrode for the Electrosorption of Rhodamine B: Structural Characterizations and Kinetic Study
by Ahmed Chennah, Moonis Ali Khan, Mohamed Zbair and Hassan Ait Ahsaine
Catalysts 2023, 13(6), 1009; https://doi.org/10.3390/catal13061009 - 15 Jun 2023
Cited by 4 | Viewed by 1183
Abstract
In this work, the aim was to enhance the performance of activated carbon (AC) as an electroadsorbent by incorporating NiO particles, thereby increasing its electrochemical capacity and its ability to adsorb Rhodamine B (RhB) dye. The prepared NiO/AC material was characterized using X-ray [...] Read more.
In this work, the aim was to enhance the performance of activated carbon (AC) as an electroadsorbent by incorporating NiO particles, thereby increasing its electrochemical capacity and its ability to adsorb Rhodamine B (RhB) dye. The prepared NiO/AC material was characterized using X-ray diffraction, scanning electron microscopy, BET surface area analysis, and infrared spectroscopy. The study involved the preparation of AC from almond shell biomass and the subsequent formation of a composite structure with NiO. The objective was to investigate the electrochemical adsorption capacity of the NiO/AC composite for RhB dye removal from simulated wastewaters. The experimental results demonstrated that the removal efficiency of RhB dye increased with an increase in the applied cell voltage. At a voltage of 1.4 V, a remarkable 100% removal efficiency was achieved. The electroadsorption process was well described by fitting the experimental data to the Freundlich isotherm model. The maximum adsorption capacities for RhB dye at concentrations of 7, 8, and 9 ppm were determined to be 149, 150, and 168 mg/g, respectively. Based on the obtained results, an electroadsorption mechanism was proposed to explain the observed behavior of the NiO/AC composite in adsorbing RhB dye. Overall, this study highlights the potential of the NiO/AC composite as an effective electroadsorbent for the removal of Rhodamine B dye from wastewater. The improved electrochemical capacity, coupled with the high adsorption capacity of the composite, makes it a promising material for wastewater treatment applications. Full article
(This article belongs to the Special Issue Nanostructured Materials Used for Catalytic Treatment of Hazardous Organic Dye Polluted Wastewater)
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14 pages, 3172 KiB  
Article
Photocatalytic Properties and Chemical Durability of CaO-B2O3-V2O5 Borovanadate Glasses
by Ayoub Kaaouass, Abdelkader Ben Ali, Hassan Ait Ahsaine, Ghizlaine Kaichouh, Abdelkader Zarrouk and Mohamed Saadi
Catalysts 2023, 13(3), 512; https://doi.org/10.3390/catal13030512 - 02 Mar 2023
Cited by 5 | Viewed by 1317
Abstract
The aim of this paper is to investigate the photocatalytic properties and chemical durability of the CaO-B2O3-V2O5 glasses system. The latter were synthesized by the melt-quenching technique. The amorphous nature of the prepared borovanadate glasses has [...] Read more.
The aim of this paper is to investigate the photocatalytic properties and chemical durability of the CaO-B2O3-V2O5 glasses system. The latter were synthesized by the melt-quenching technique. The amorphous nature of the prepared borovanadate glasses has been confirmed with X-ray diffraction. The chemical durability measured from their weights before and after immersion in deionized water and hydrochloric acid indicated that replacing V2O5 with B2O3 improved the chemical durability. The observed increases in chemical durability might be explained by the increase in the glass transition temperature, due to stronger bonding in the structural network. The photocatalytic performance was assessed by the degradation of methylene blue (MB) dye under irradiation, and the evolution of dye degradation was analyzed by UV-visible spectrometry. The vanadium content in the glass, the amount of catalyst, and the initial dye concentration showed a variable effect on the degradation of the MB dye. The photodegradation of methylene blue by the photocatalysts was found to follow pseudo-first-order rate kinetics. The photocatalytic activity for all the prepared photocatalysts showed a higher degradation performance, and the results indicated that 40 CaO-30 B2O3-30 V2O5 has the highest removal efficiency of about 99% in 180 min. Full article
(This article belongs to the Special Issue Nanostructured Materials Used for Catalytic Treatment of Hazardous Organic Dye Polluted Wastewater)
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12 pages, 4292 KiB  
Article
Synthesis and Electrocatalytic Activity of Bismuth Tungstate Bi2WO6 for Rhodamine B Electro-Oxidation
by Hassan Ait Ahsaine, Amal BaQais, Madjid Arab, Bahcine Bakiz and Abdeljalil Benlhachemi
Catalysts 2022, 12(11), 1335; https://doi.org/10.3390/catal12111335 - 01 Nov 2022
Cited by 8 | Viewed by 1630
Abstract
Herein, we have synthesized different BWO samples at different temperatures and evaluated their electrochemical oxidation of Rhodamine B dye in an aqueous medium. The prepared samples were characterized using X-ray diffraction combined with Rietveld refinements, scanning electron microscope coupled with energy dispersive elemental [...] Read more.
Herein, we have synthesized different BWO samples at different temperatures and evaluated their electrochemical oxidation of Rhodamine B dye in an aqueous medium. The prepared samples were characterized using X-ray diffraction combined with Rietveld refinements, scanning electron microscope coupled with energy dispersive elemental mapping, and thermogravimetric and differential thermal analyses. All the samples crystallize in the orthorhombic Pca21 structure. The crystallite size increased with temperature. The calculated surface areas from the XRD data ranged from 38 to 7 m2 g−1 for BWO-600 to BWO-900, respectively. The optimal BWO loadings on the GCE electrode were 5 × 10−8 mol cm−2 recording the best electrocatalytic efficiency for RhB electrodegradation in 15 min (100%) in 0.1 M of NaCl. The BWO-600 recorded the best activity compared to other BWO samples. The electrocatalytic activity was explained by the high surface area and small crystallite size compared to the other samples. The BWO-600 showed extended electrode reutilization for up to four cycles of reuse under the reported conditions. Full article
(This article belongs to the Special Issue Nanostructured Materials Used for Catalytic Treatment of Hazardous Organic Dye Polluted Wastewater)
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