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Catalysts
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Recent Developments in Photocatalytic Water Treatment Technology
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Recent Developments in Photocatalytic Water Treatment Technology

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

Deadline for manuscript submissions: closed (31 January 2025) | Viewed by 4383

Special Issue Editor

Prof. Dr. Priscy Alfredo Luque Morales

E-Mail Website
Guest Editor
Facultad de Ingeniería, Arquitectura y Diseño, Universidad Autónoma de Baja California (UABC), Ensenada 22860, Baja California, Mexico
Interests: semiconductors; metal oxides; catalytic activity; biosynthesis
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

This Special Issue aims to critically review the latest advances in photocatalytic materials and the optimization of photocatalytic processes to enhance the efficiency and selectivity of contaminant degradation. The most innovative developments in nanocomposite materials, doping strategies, reactor design, and light energy sources are highlighted, with the aim of providing a deeper understanding of the practical applications and challenges remaining in the field of photocatalysis for water treatment.

Effective wastewater treatment is crucial to addressing the proliferating environmental challenges and ensuring the availability of clean water. In this context, there are now numerous alternatives to water treatment, but one particularly interesting alternative is photocatalysis; this utilizes materials that are able to accelerate chemical reactions by absorbing light, generally ultraviolet light or visible light. Photocatalysis has emerged as a promising technology with the capacity to degrade the contaminants present in water. This Special Issue, entitled "Recent Developments in Photocatalytic Water Treatment Technology", aims to provide a comprehensive exploration of the most recent advances in photocatalytic water treatment technology, with a particular emphasis on the significance of these developments in addressing the challenges associated with the contemporary environment. Photocatalysis is presented as a promising solution in this context, owing to its ability to degrade an extensive range of contaminants, including recalcitrant organic compounds, heavy metals, and pathogens, via the generation of reactive oxygen species and electrons in the presence of light.

Prof. Dr. Priscy Alfredo Luque Morales
Guest Editor

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 2200 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
  • water treatment
  • nanomaterials
  • catalysts
  • environmental sustainability
  • degradation of contaminants
  • advanced oxidation processes

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Published Papers (2 papers)

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15 pages, 4192 KiB  
Article
Eco-Friendly TiO2 Nanoparticles: Harnessing Aloe Vera for Superior Photocatalytic Degradation of Methylene Blue
by Agnese De Luca, Angelantonio De Benedetto, Valeria De Matteis, Mariafrancesca Cascione, Riccardo Di Corato, Chiara Ingrosso, Massimo Corrado and Rosaria Rinaldi
Catalysts 2024, 14(11), 820; https://doi.org/10.3390/catal14110820 - 13 Nov 2024
Cited by 2 | Viewed by 1408
Abstract
In recent years, the contamination of aquatic environments by organic chemicals, including dyes such as methylene blue (MB), Congo red, and crystal violet, has become an increasing concern, as has their treatment. In this work, titanium dioxide nanoparticles (TiO2 NPs) were studied [...] Read more.
In recent years, the contamination of aquatic environments by organic chemicals, including dyes such as methylene blue (MB), Congo red, and crystal violet, has become an increasing concern, as has their treatment. In this work, titanium dioxide nanoparticles (TiO2 NPs) were studied for their photocatalytic performance by measuring the degradation of MB under UV light. TiO2 NPs were synthesized using two synthetic processes optimized in this study: a green method, namely leveraging the natural properties of Aloe vera leaf extract; and a conventional approach. The resulting NPs were thoroughly characterized using X-rays Diffraction (XRD), Transmission Electron Microscopy (TEM), Scanning Electron Microscopy (SEM), Brunauer–Emmett–Teller (BET), UV–Vis and ζ-potential analysis. The TiO2 NPs synthesized by the green method demonstrated a degradation efficiency of (50 ± 3)% after 180 min, which was significantly higher than the (16 ± 3)% achieved by NPs synthesized through the conventional route. Moreover, the reaction rate constant for the green-synthesized TiO2 NPs was found to be approximately five times greater than that of the conventionally synthesized NPs. These results open up a new scenario in the pollution removal strategy research, using resources accessible in nature to synthesize NPs with high photocatalytic activity, which could also be useful for other applications, such as hydrogen production. Full article
(This article belongs to the Special Issue Recent Developments in Photocatalytic Water Treatment Technology)
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21 pages, 11794 KiB  
Article
Degradation of Organic Dye Congo Red by Heterogeneous Solar Photocatalysis with Bi2S3, Bi2S3/TiO2, and Bi2S3/ZnO Thin Films
by Eli Palma Soto, Claudia A. Rodriguez Gonzalez, Priscy Alfredo Luque Morales, Hortensia Reyes Blas and Amanda Carrillo Castillo
Catalysts 2024, 14(9), 589; https://doi.org/10.3390/catal14090589 - 2 Sep 2024
Cited by 4 | Viewed by 2233
Abstract
In this work, bismuth sulfide (Bi2S3) thin films were deposited by a chemical bath deposition (CBD) technique (called soft chemistry), while titanium dioxide (TiO2) nanoparticles were synthesized by sol–gel and zinc oxide (ZnO) nanoparticles were extracted from [...] Read more.
In this work, bismuth sulfide (Bi2S3) thin films were deposited by a chemical bath deposition (CBD) technique (called soft chemistry), while titanium dioxide (TiO2) nanoparticles were synthesized by sol–gel and zinc oxide (ZnO) nanoparticles were extracted from alkaline batteries. The resulting nanoparticles were then deposited on the Bi2S3 thin films by spin coating at 1000 rpm for 60 s each layer to create heterojunctions of Bi2S3/ZnO and Bi2S3/TiO2. These materials were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), and energy dispersive X-ray spectroscopy (EDX). The optical and contact angle analyses were undertaken by UV–Vis spectroscopy and a contact microscopy angle meter, respectively. The calculated band gap values were found to be between 1.9 eV and 2.45 eV. The Bi2S3 presented an orthorhombic structure, the TiO2 nanoparticles presented an anatase structure, and the ZnO nanoparticles presented a wurtzite hexagonal crystal structure. Furthermore, heterogeneous solar photocatalysis was performed using the Bi2S3, Bi2S3/ZnO, and Bi2S3/TiO2 thin film combinations, which resulted in the degradation of Congo red increasing from 8.89% to 30.80% after a 30 min exposure to sunlight. Full article
(This article belongs to the Special Issue Recent Developments in Photocatalytic Water Treatment Technology)
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