Recent Advances in g-C3N4-Based Photocatalysts

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

Deadline for manuscript submissions: 30 November 2024 | Viewed by 2473

Special Issue Editors


E-Mail Website
Guest Editor
Institute of Nanoscience and Nanotechnology, National Centre for Scientific Research, Athens 15341, Greece
Interests: photocatalysis; fluorescent materials; semiconductors; environmental science; nanomaterials

E-Mail Website
Guest Editor
Institute of Nanoscience and Nanotechnology, National Centre for Scientific Research, Athens 15341, Greece
Interests: graphene; photocatalysis; nanotechnology; 2D nanostructures; chemistry; energy and environmental applications

Special Issue Information

Dear Colleagues,

Intensive research efforts are dedicated to the development of photocatalytic systems with respect to our increased awareness for environmental protection. Graphitic carbon nitride, g-C3N4, has emerged as a leading photocatalyst with excellent chemical and thermal stability and straightforward preparation methodologies that easily allow the synthesis of large quantities. As a photocatalyst, it has been applied for a series of environmental applications, including the degradation of pollutants, hydrogen evolution, carbon dioxide reduction and removal of nitrogen oxides.

In order to outline the major recent progress in the field, this Special Issue is mainly focusing on the following topics:

- Photocatalysis for CO2 reduction, NOX removal and H2 formation;

- Decomposition of organic micropollutants;

- Synthesis and characterization of heterojunction photocatalysts with improved performance;

- Structure–properties relation and evaluation οf optimum composition;

- Water treatment and decontamination.

If you would like to submit papers to this Special Issue or have any questions, please contact the editor, Mr. Ives Liu (ives.liu@mdpi.com).

Dr. Panagiotis Dallas
Dr. Christos Trapalis
Guest Editors

Manuscript Submission Information

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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

  • photocatalysis
  • carbon dioxide reduction
  • g-C3N4
  • reactive oxygen species
  • nitrogen oxides

Published Papers (2 papers)

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Research

16 pages, 7610 KiB  
Article
Enhancing the Visible Light Photocatalytic Activity of TiO2-Based Coatings by the Addition of Exfoliated g-C3N4
by Ilias Papailias, Nadia Todorova, Tatiana Giannakopoulou, Niki Plakantonaki, Michail Vagenas, Panagiotis Dallas, George C. Anyfantis, Ioannis Arabatzis and Christos Trapalis
Catalysts 2024, 14(5), 333; https://doi.org/10.3390/catal14050333 - 20 May 2024
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Abstract
In the last few years, increasing interest from researchers and companies has been shown in the development of photocatalytic coatings for air purification and self-cleaning applications. In order to maintain the photocatalyst’s concentration as low as possible, highly active materials and/or combinations of [...] Read more.
In the last few years, increasing interest from researchers and companies has been shown in the development of photocatalytic coatings for air purification and self-cleaning applications. In order to maintain the photocatalyst’s concentration as low as possible, highly active materials and/or combinations of them are required. In this work, novel photocatalytic formulations containing g-C3N4/TiO2 composites were prepared and deposited in the form of coatings on a-block substrates. The obtained photocatalytic surfaces were tested for NOx and acetaldehyde removal from model air. It was found that the addition of only 0.5 wt% g-C3N4 towards TiO2 content results in over 50% increase in the photocatalytic activity under visible light irradiation in comparison to pure TiO2 coating, while the activity under UV light was not affected. The result was related to the creation of a g-C3N4/TiO2 heterojunction that improves the light absorption and the separation of photogenerated electron-hole pairs, as well as to the inhibition of TiO2 particles’ agglomeration due to the presence of g-C3N4 sheets. Full article
(This article belongs to the Special Issue Recent Advances in g-C3N4-Based Photocatalysts)
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15 pages, 4670 KiB  
Article
Heterogeneous Photocatalytic Oxidation and Detoxification of Simulated Agricultural Wastewater Contaminated with Boscalid Fungicide Using g-C3N4 Catalyst
by Maria Antonopoulou, Anna Tzamaria, Kleopatra Miserli, Christos Lykos and Ioannis Konstantinou
Catalysts 2024, 14(2), 112; https://doi.org/10.3390/catal14020112 - 31 Jan 2024
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Abstract
In the present study, the photocatalytic oxidation and detoxification of aqueous matrices contaminated with boscalid using g-C3N4 catalyst and UV-A light was investigated. The UV-A/g-C3N4 process was found to achieve higher than 83% removal of boscalid in [...] Read more.
In the present study, the photocatalytic oxidation and detoxification of aqueous matrices contaminated with boscalid using g-C3N4 catalyst and UV-A light was investigated. The UV-A/g-C3N4 process was found to achieve higher than 83% removal of boscalid in both matrices, with h+ and O2 being the main species. UHPLC-HRMS analysis allowed the identification of five TPs, while the main degradation pathways involved hydroxylation, cyclization, and dechlorination. Scenedesmus rubescens microalgae species was exposed to boscalid solutions and lake water spiked with the fungicide before the photocatalytic treatment and inhibition in the growth rate was observed. An increase in the toxicity was also observed during the first stages of the treatment. The results from the in silico study correlate with the observed evolution of ecotoxicity during the application of the process, as some of the identified TPs were found to be toxic or very toxic for aquatic organisms. However, prolonged application of the process can lead to detoxification. It was also observed that the g-C3N4 catalyst can retain its photochemical stability and activity after at least three cycles. However, a slight decrease in the activity was observed when repeated another two times. This study demonstrated that the suggested photocatalytic process can both decrease the harmful effects of boscalid as well as effectively lower its concentration in water. Full article
(This article belongs to the Special Issue Recent Advances in g-C3N4-Based Photocatalysts)
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