Special Issue "Photocatalytic Oxidation/Ozonation Processes"

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

Deadline for manuscript submissions: 30 June 2020.

Special Issue Editors

Guest Editor
Prof. Fernando J. Beltrán Novillo Website E-Mail
Instituto Universitario de Investigación del Agua, Cambio Climático y Sostenibilidad Universidad de Extremadura, Badajoz, Spain
Interests: Water Ozonation; Advanced Oxidation Processes; Catalysis Engineering; Environmental Remediation; Photocatalysis
Guest Editor
Prof. Juan F. Garcia-Araya E-Mail
Departamento de Ingeniería Química y Química Física, Instituto Universitario de Investigación del Agua, Cambio Climático y Sostenibilidad, Universidad de Extremadura, Badajoz, Spain.
Interests: Water Ozonation; Advanced Oxidation Processes; Catalysis Engineering; Environmental Remediation; Photocatalysis

Special Issue Information

Dear Colleagues,

Nowadays, the increasing demand for water requires research works on water treatment to provide in-depth studies of tertiary operations, such as membrane technologies, adsorption, and chemical oxidation, with the aim of the reuse of water. Among these technologies, advanced chemical oxidation processes (ACOPs), where hydroxyl radicals are the main oxidizing species, stand out because they may completely remove contaminants, while the other process types only transfer contaminants from one phase (water) to another (membrane concentrates, adsorbents, etc). Photochemical oxidation is one ACOP that has already been proved to be efficient in pollutant removal. This technology uses the radiation of a semiconductor catalyst to generate charge carriers (holes and electrons) that eventually form hydroxyl radicals. The process works efficiently with UV lamps and TiO2 in powder form as a catalyst; however, it has a series of drawbacks such that real application of the process has not yet been possible. Among these problems, one can highlight the high recombination of charge carriers that inhibit the process, the poor or null TiO2 activity with visible light due to its high band gap, and the difficult and costly separation of TiO2 from the treated water. In addition, the use of UV lamps based on mercury makes this process environmentally unsustainable. In order to solve these problems, research is focusing on doped TiO2, supported or magnetic photocatalysts, and the use of solar light or higher energetic efficiency and toxicity-free UVA light-emitting diodes (LEDs). Also, photocatalytic ozonation, or the process based on the synergism between ozonation and photocatalytic oxidation, is another, even more powerful, ACOP for the formation of hydroxyl radicals apart from the possible direct oxidation with ozone itself.

This special issue will focus on works about the synthesis and characterization of supported or magnetic photocatalysts and their application in reactions with water pollutants in the presence of visible light (solar or simulated) or radiation from UVA–visible LEDs with and without the presence of ozone. The aim is to look for conditions that would make photocatalytic oxidation/ozonation a suitable technology for real application in water treatment or wastewater reuse.

Prof. Fernando J. Beltrán Novillo
Prof. Juan F. Garcia-Araya
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 papers will be 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 1600 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

  • Ozonation,
  • photocatalytic oxidation
  • photocatalytic ozonation
  • water contaminants
  • wastewater reuse
  • supported photocatalysts
  • magnetic photocatalysts
  • LEDS, visible active photocatalysts
  • solar radiation

Published Papers

This special issue is now open for submission.
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