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Processes
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Mechanisms, Devices and Applications of Photocatalytic Processes
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Mechanisms, Devices and Applications of Photocatalytic Processes

A special issue of Processes (ISSN 2227-9717). This special issue belongs to the section "Catalysis Enhanced Processes".

Deadline for manuscript submissions: 30 April 2026 | Viewed by 2245

Special Issue Editor

Dr. Renquan Guan

E-Mail Website
Guest Editor
State Key Laboratory for Superlattices and Microstructures, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, China
Interests: photocatalytic ammonia synthesis; magnetic field; self-Fenton; H2O2

Special Issue Information

Dear Colleagues,

Photocatalytic technology offers an innovative approach to addressing the energy and environmental challenges faced by human society. Research on photocatalytic hydrogen evolution, nitrogen reduction, carbon dioxide reduction, and high-value chemical conversion is advancing rapidly. In-depth investigations into the development of devices and mechanisms for these photocatalytic reactions are crucial for promoting the advancement and practical application of photocatalytic technology.

This Special Issue on “Mechanisms, Devices and Applications of Photocatalytic Processes” seeks high-quality works focusing on the new materials, mechanisms, and devices for photocatalytic reactions. Topics include, but are not limited to, the following:

  1. Development of new materials for photocatalytic reactions;
  2. Design and development of photocatalytic reaction devices;
  3. Exploration of new mechanisms in photocatalytic reactions.

Dr. Renquan Guan
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 250 words) can be sent to the Editorial Office for assessment.

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 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 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

  • photocatalytic
  • mechanism
  • wastewater cleaning
  • hydrogen evolution
  • nitrogen reduction reaction
  • CO2 reduction
  • magnetic field

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Published Papers (2 papers)

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Research

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16 pages, 5313 KB  
Article
Upscaling of Toluene Oxidation Using Water-Sprinkled Pulsed Corona Discharge and Photocatalysis
by Daniel A. Teittinen, Sergei Preis and Juri Bolobajev
Processes 2025, 13(9), 2982; https://doi.org/10.3390/pr13092982 - 18 Sep 2025
Viewed by 577
Abstract
Advanced oxidation processes (AOPs) utilising a hydroxyl radical (•OH), a strong oxidant, are seen as a promising solution for removing hazardous and recalcitrant pollutants from waste streams. Among AOPs, non-thermal plasmas, especially pulsed corona discharge (PCD), enable the abatement of hazardous volatile organic [...] Read more.
Advanced oxidation processes (AOPs) utilising a hydroxyl radical (•OH), a strong oxidant, are seen as a promising solution for removing hazardous and recalcitrant pollutants from waste streams. Among AOPs, non-thermal plasmas, especially pulsed corona discharge (PCD), enable the abatement of hazardous volatile organic compounds (VOCs) with high energy efficiency. This study demonstrates the viability of upscaling PCD technology with water sprinkling in degrading the VOC toluene using a semi-pilot scale plasma reactor. A toluene–air mixture was treated with varying gas-phase toluene concentrations (30–100 ppm) and pulse repetition frequencies (25–800 pps), achieving toluene removal of 5–55% in PCD and an additional 10–18% in PCO, as well as excellent toluene removal energy efficiencies from 9.0 to 37.1 g kW−1 h−1. The process design with water sprinkling provides additional advantages compared to dry reactors—the water surface serves as a source of hydroxyl radicals and scrubs the air from degradation by-products resulting from the incomplete oxidation of target pollutants. Transformation products of toluene were identified, and an oxidation pathway via hydroxylation of the aromatic ring was suggested as the major route towards ring-opening reactions. A photocatalytic oxidation reactor with TiO2 catalyst plates, following PCD as a post-treatment, enabled additional removal of residual contaminants, also converting residual ozone to oxygen. The PCD reactor with water sprinkling and post-plasma photocatalysis shows promising results for upscaling the process. Full article
(This article belongs to the Special Issue Mechanisms, Devices and Applications of Photocatalytic Processes)
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Review

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32 pages, 1477 KB  
Review
Photochemical Catalysts for Hydrocarbons and Biomass Derivates Reforming in Intensified Processes
by Mattia Boscherini and Francesco Miccio
Processes 2025, 13(7), 2150; https://doi.org/10.3390/pr13072150 - 6 Jul 2025
Viewed by 1448
Abstract
Photocatalysts for applications in different sectors, e.g., civil and environmental, are already developed to a mature extent and allow, for example, the purification of gaseous and liquid streams or the self−cleaning surfaces. The application of photocatalysts in the industrial sector is, however, quite [...] Read more.
Photocatalysts for applications in different sectors, e.g., civil and environmental, are already developed to a mature extent and allow, for example, the purification of gaseous and liquid streams or the self−cleaning surfaces. The application of photocatalysts in the industrial sector is, however, quite limited. The review addresses the specific topic of the photocatalytic reforming of methane and biomass derivates. In this regard, recent advances in materials science are reported and discussed, in particular regarding doped and modified oxides (TiO2 and ZrO2) or non−oxidic ceramics. Concerning process integration, a comparison between traditional two−dimensional photoreactors and fluidized bed systems is proposed and design guidelines are drawn, with indications of the possible benefits. Photocatalytic fluidized beds appear more suitable for small− and medium−scale integrated processes of reforming, operating at lower temperatures than traditional ones for distributed hydrogen generation. Full article
(This article belongs to the Special Issue Mechanisms, Devices and Applications of Photocatalytic Processes)
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