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Processes
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Advances in the Photocatalysis and Photodegradation of Various Contaminants Present...
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Advances in the Photocatalysis and Photodegradation of Various Contaminants Present in Water

A special issue of Processes (ISSN 2227-9717). This special issue belongs to the section "Chemical Processes and Systems".

Deadline for manuscript submissions: 30 November 2025 | Viewed by 2585

Special Issue Editors

Dr. Manuel J. Chinchillas-Chinchillas

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Guest Editor
Departamento de Ingeniería y Tecnología, Unidad Regional Los Mochis, Universidad Autónoma de Occidente (UAdeO), Los Mochis 81223, Sinaloa, Mexico
Interests: nanotechnology; nanoparticles; green synthesis; photocatalysis
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
Dr. Horacio Edgardo Garrafa-Gálvez

E-Mail Website
Guest Editor
Facultad de Ingeniería Mochis, Universidad Autónoma de Sinaloa (UAS), Los Mochis 81223, Sinaloa, Mexico
Interests: nanoparticles; green synthetics; semiconductors; ambient purification
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Water pollution is a serious global problem, and it worsens with each passing day. Due to human activities, various pollutants are discarded into water daily, creating significant health risks for people and ecosystems. Therefore, it is essential to find alternatives to address this issue. Among the various methods employed for water treatment, photocatalysis is a promising technology. It is a process that uses light energy and a photocatalyst to trigger chemical reactions that break down pollutants into simpler molecules, reducing toxicity and facilitating their degradation in water. Consequently, it is crucial to continue exploring advances in the development of new photocatalytic materials to enhance the performance of pollutant degradation in water and to provide a sustainable solution to this issue.

This Special Issue on “Advances in the Photocatalysis and Photodegradation of Various Contaminants in Water” seeks high-quality papers focused on the use of novel photocatalysts and the degradation of contaminants in water through photocatalysis. Topics include, but are not limited to, methods and/or applications in the following areas:

  • The synthesis, characterization, and application of novel photocatalysts (metals, metal oxides, semiconductors, non-metal oxides, and others);
  • Nanotechnology and its use in photocatalysis;
  • Sustainability and the degradation of various contaminants through photocatalysis (pesticides, dyes, pharmaceuticals, and others);
  • The application of photocatalytic processes at an industrial scale;
  • Other related topics.

This Special Issue addresses the critical environmental problem of water pollution, seeking practical alternatives and solutions in this field.

Dr. Manuel J. Chinchillas-Chinchillas
Prof. Dr. Priscy Alfredo Luque Morales
Dr. Horacio Edgardo Garrafa-Gálvez
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. Processes 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 2400 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
  • synthesis and characterization
  • photocatalysts
  • water pollutants
  • water treatment
  • environmental applications
  • sustainability

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Further information on MDPI's Special Issue policies can be found here.

Published Papers (2 papers)

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Research

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16 pages, 4716 KiB  
Article
Photocatalytic Degradation of Four Organic Dyes Present in Water Using ZnO Nanoparticles Synthesized with Green Synthesis Using Ambrosia ambrosioides Leaf and Root Extract
by Martin Medina-Acosta, Manuel J. Chinchillas-Chinchillas, Horacio E. Garrafa-Gálvez, Caree A. Garcia-Maro, Carlos A. Rosas-Casarez, Eder Lugo-Medina, Priscy A. Luque-Morales and Carlos A. Soto-Robles
Processes 2024, 12(11), 2456; https://doi.org/10.3390/pr12112456 - 6 Nov 2024
Cited by 5 | Viewed by 1831
Abstract
Currently, several organic dyes found in wastewater cause severe contamination problems for flora, fauna, and people in direct contact with them. This research proposes an alternative for the degradation of polluting dyes using ZnO nanoparticles (NPs) synthesized by an ecological route using leaf [...] Read more.
Currently, several organic dyes found in wastewater cause severe contamination problems for flora, fauna, and people in direct contact with them. This research proposes an alternative for the degradation of polluting dyes using ZnO nanoparticles (NPs) synthesized by an ecological route using leaf and root extracts of Ambrosia ambrosioides as a reducing agent (with a weight/volume ratio = 4%). Scanning Electron Microscopy (SEM) was used to determine the morphology, showing an agglomeration of cluster-shaped NPs. Using Transmission Electron Microscopy (TEM), different sizes of NPs ranging from 5 to 56 nm were observed for both synthesized NPs. The composition and structure of the nanomaterial were analyzed by infrared spectroscopy (FT-IR) and X-ray diffraction (XRD), showing as a result that the NPs have a wurtzite-like crystalline structure with crystallite sizes around 32–37 nm for both samples. Additionally, the bandgap of the NPs was calculated using Ultraviolet Visible Spectroscopy (UV–Vis), determining values of 2.82 and 2.70 eV for the NPs synthesized with leaf and root, respectively. Finally, thermogravimetric analysis demonstrated that the nanoparticles contained an organic part after the green synthesis process, with high thermal stability for both samples. Photocatalytic analysis showed that these nanomaterials can degrade four dyes under UV irradiation, reaching 90% degradation for methylene blue (MB), methyl orange (MO) and Congo red (CR) at 60, 100 and 60 min, respectively, while for methyl red (MR) almost 90% degradation was achieved at 140 min of UV irradiation. These results demonstrate that it is effective to use Ambrosia ambrosioides root and leaf extracts as a reducing agent for the formation of ZnO NPs, also evidencing their favorable application in the photocatalytic degradation of these four organic dyes. Full article
(This article belongs to the Special Issue Advances in the Photocatalysis and Photodegradation of Various Contaminants Present in Water)
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Review

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17 pages, 971 KiB  
Review
University of Oslo-66: A Versatile Zr-Based MOF for Water Purification Through Adsorption and Photocatalysis
by Lei Chen, Wenbo Pan, Ke Li, Miaomiao Chen, Pan Li, Yu Liu, Zeyu Li and Hai Lu
Processes 2025, 13(4), 1133; https://doi.org/10.3390/pr13041133 - 9 Apr 2025
Viewed by 450
Abstract
Metal–organic frameworks (MOFs) have garnered significant attention for water purification in recent years. In particular, UiO-66 (a member of the UiO-MOF family, developed at the University of Oslo) has emerged as a promising water purification material. UiO-66 exhibits excellent adsorption through electrostatic interaction, [...] Read more.
Metal–organic frameworks (MOFs) have garnered significant attention for water purification in recent years. In particular, UiO-66 (a member of the UiO-MOF family, developed at the University of Oslo) has emerged as a promising water purification material. UiO-66 exhibits excellent adsorption through electrostatic interaction, π–π stacking and Lewis acid–base coordination mechanisms. The photocatalytic degradation property was enhanced through metal doping, composite with semiconductor materials, defect engineering, etc., and the removal efficiency of pollutants was significantly improved. This review systematically describes the structure of UiO-66 and the synthesis methods of UiO-66, including solvothermal, microwave-assisted, mechanized and electrochemical methods, as well as the application of UiO-66 in the adsorption and photocatalytic degradation of various pollutants. Full article
(This article belongs to the Special Issue Advances in the Photocatalysis and Photodegradation of Various Contaminants Present in Water)
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