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Preparation, Mechanism and Application of Photo and Electrocatalytic Materials

A special issue of Materials (ISSN 1996-1944). This special issue belongs to the section "Catalytic Materials".

Deadline for manuscript submissions: closed (20 January 2024) | Viewed by 1116

Special Issue Editors


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Guest Editor
IM2NP, University of Toulon, La Garde, France
Interests: development of nanomaterials for environmental applications; detection and transformation of pollutants into clean by-products; nanomaterials; nanostructuration; gas sensors; heterogeneous catalysis; organic dye decomposition; CO2 reduction; methane oxidation; electrical and optical properties
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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

Special Issue Information

Dear Colleagues,

The issues related to energy crises and environmental pollution have worsened with the continued and fast growth of industry and civilization. A serious concern is posed by the worldwide water shortage brought on by the rapid development of businesses and the depletion of freshwater supplies as well as energy concerns. Additionally, freshwater that may be used for drinking is becoming tainted, and the development of organic pollutants in aquatic environments—known for their mobility, toxicity, and persistence—poses serious hazards to ecosystems, human health, and other living things. Therefore, before water is drunk or used, it must be treated by removing dangerous contaminants, including organic dyes, antibiotics, and more. Catalysis for energy production and production is a major concern of the current century. Clean and green hydrogen, along with its derivatives, is one global challenge to attain zero carbon economy. Rigorously developing functional photo and electrocatalysts for pollutants degradation and energy conversion is a necessity to sustain our planet, life, and ecosystems. We welcome research papers, communications, and reviews which focus on this topic.

This Special Issue aims to broadly cover the up-to-date aspects of the theory, design, technology, characterization, and current and future applications of novel materials, particularly concerning the following topics:

  • Photocatalysts/electrocatalysts materials for pollutants removal;
  • Photocatalysts/electrocatalysts materials for hydrogen evolution reaction;
  • Effect of morphology on photo and/or electrocatalysis;
  • Nanostructuring, morphology, and self-assembly of materials in photocatalysis;
  • Mechanistic studies in photo and electrocatalysis.

Dr. Madjid Arab
Prof. Dr. Hassan Ait Ahsaine
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. Materials 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 2600 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

  • photocatalysis by design
  • electrocatalysis by design
  • mechanistic studies on photo and electrocatalytic materials
  • photocatalytic/electrocatalytic degradation of organic molecules
  • photocatalytic/electrocatalytic for hydrogen evolution reaction

Published Papers (1 paper)

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Research

19 pages, 5124 KiB  
Article
Design of Bismuth Tungstate Bi2WO6 Photocatalyst for Enhanced and Environmentally Friendly Organic Pollutant Degradation
by Aicha El Aouni, Mohamed El Ouardi, Madjid Arab, Mohamed Saadi, Henrik Haspel, Zoltán Kónya, Abdelkader Ben Ali, Amane Jada, Amal BaQais and Hassan Ait Ahsaine
Materials 2024, 17(5), 1029; https://doi.org/10.3390/ma17051029 - 23 Feb 2024
Cited by 3 | Viewed by 927
Abstract
In this study, a chemical precipitation approach was adopted to produce a photocatalyst based on bismuth tungstate Bi2WO6 for enhanced and environmentally friendly organic pollutant degradation. Various tools such as X-ray diffraction (XRD), Raman spectroscopy, scanning electron microscopy (SEM), optical [...] Read more.
In this study, a chemical precipitation approach was adopted to produce a photocatalyst based on bismuth tungstate Bi2WO6 for enhanced and environmentally friendly organic pollutant degradation. Various tools such as X-ray diffraction (XRD), Raman spectroscopy, scanning electron microscopy (SEM), optical spectroscopy and X-ray photoelectron spectroscopy, were employed to assess the structural and morphological properties. Hence, the XRD profiles showed a well crystallized Bi2WO6 orthorhombic phase. The photocatalytic performance of the resulting photocatalyst was assessed by the decomposition of Rhodamine B (RhB) and methyl orange (MO) with a decomposition efficiency of 97 and 92%, along with the highest chemical oxygen demand of 82 and 79% during 120 min of illumination, respectively. The principal novelty of the present work is to focus on the changes in the crystalline structure, the morphology, and the optical and the photoelectrochemical characteristics of the Bi2WO6, by tuning the annealing temperature of the designed photocatalyst. Such physicochemical property changes in the as-prepared photocatalyst will affect in turn its photocatalytic activity toward the organic pollutant decomposition. The photocatalytic mechanism was elaborated based on electrochemical impedance spectroscopy, photocurrent analysis, photoluminescence spectroscopy, and radical trapping measurements. The overall data indicate that the superoxide O2•− and holes h+ are the principal species responsible for the pollutant photodegradation. Full article
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