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Catalysts
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Recent Advances in Photocatalysis Technology in Europe and Asia
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Recent Advances in Photocatalysis Technology in Europe and Asia

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

Deadline for manuscript submissions: closed (15 December 2021) | Viewed by 9389

Special Issue Editors

Dr. Alaa Khalil

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Guest Editor
Chemistry of oxidic and organic interfaces, Karlsruhe Institute of Technology, Karlsruhe, Germany
Interests: photocatalysis; membrane technology; water treatment; MOFs; nanofiber; nanoparticles
Prof. Dr. Jae Woo Choi

E-Mail Website
Guest Editor
Korea Institute of Science and Technology, Water Cycle Research Center, Seoul, Korea
Interests: Earth science; environmental Earth science; development of adsorbents and catalysts for water treatment; biological treatment; contaminant transport modeling; control of algae bloom
Prof. Dr. Keunsu Choi

E-Mail Website
Guest Editor
Ulsan National Institute of Science and Technology, Ulsan, Korea
Interests: Carbon-based catalyst; Computational Science for photocatalytic reaction; Removal mechanism of toxic organic molecule in water

Special Issue Information

Dear Colleagues,

Photocatalysis processes have been gaining much interest recently as a low-cost, green-chemical, and sustainable technology able to address energy and environmental issues. Photocatalysts have a great potential for sustainable environment and renewable energy, such as removal of various hazardous organic compounds, generation of hydrogen, fuel cells, self-cleaning, storage materials, exhaust gases, and disinfection. This Special Issue will focus on recent developments and advances of photocatalysis in the design, preparation, and characterization of novel photocatalytic materials with unique properties for the improvement of photocatalytic performance for advanced applications, as well as understanding of photocatalytic reactions, kinetics, and mechanisms. Photocatalytic membranes and reactors are also introduced. Both original research and review papers are welcome.

Dr. Alaa Khalil
Prof. Dr. Jae-Woo Choi
Prof. Dr. Keunsu Choi
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 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
  • photocatalytic reaction kinetics and mechanisms
  • nanomaterials
  • porous materials
  • energy storage
  • water and wastewater treatment
  • materials characterization
  • synthesis method
  • water splitting
  • membrane reactor
  • visible-light-driven photocatalytic process
  • H2 generation
  • CO2 reduction

Published Papers (4 papers)

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Research

22 pages, 6131 KiB  
Article
Opto-Electronic Characterization of Photocatalysts Based on p,n-Junction Ternary and Quaternary Mixed Oxides Semiconductors (Cu2O-In2O3 and Cu2O-In2O3-TiO2)
by Davide Michele Stefano Marcolongo, Francesco Nocito, Nicoletta Ditaranto, Roberto Comparelli, Michele Aresta and Angela Dibenedetto
Catalysts 2022, 12(2), 153; https://0-doi-org.brum.beds.ac.uk/10.3390/catal12020153 - 26 Jan 2022
Cited by 7 | Viewed by 2517
Abstract
Semiconductor materials are the basis of electronic devices employed in the communication and media industry. In the present work, we report the synthesis and characterization of mixed metal oxides (MOs) as p,n-junction photocatalysts, and demonstrate the correlation between the preparation [...] Read more.
Semiconductor materials are the basis of electronic devices employed in the communication and media industry. In the present work, we report the synthesis and characterization of mixed metal oxides (MOs) as p,n-junction photocatalysts, and demonstrate the correlation between the preparation technique and the properties of the materials. Solid-state UV-visible diffuse reflectance spectroscopy (UV-VIS DRS) allowed for the determination of the light absorption properties and the optical energy gap. X-ray photoelectron spectroscopy (XPS) allowed for the determination of the surface speciation and composition and for the determination of the valence band edge. The opto-electronic behavior was evaluated measuring the photocurrent generated after absorption of chopped visible light in a 3-electrode cell. Scanning electron microscopy (SEM) measurements allowed for auxiliary characterization of size and morphology, showing the formation of composites for the ternary Cu2O-In2O3 p,n-mixed oxide, and even more for the quaternary Cu2O-In2O3-TiO2 MO. Light absorption spectra and photocurrent-time curves mainly depend upon the composition of MOs, while the optical energy gap and defective absorption tail are closely related to the preparation methodology, time and thermal treatment. Qualitative electronic band structures of semiconductors are also presented. Full article
(This article belongs to the Special Issue Recent Advances in Photocatalysis Technology in Europe and Asia)
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10 pages, 2422 KiB  
Article
Highly Efficient Visible Light Photodegradation of Cr(VI) Using Electrospun MWCNTs-Fe3O4@PES Nanofibers
by Alaa Mohamed, Samy Yousef, Shady Ali, Mantas Sriubas, Sarunas Varnagiris, Simona Tuckute, Mohammed Ali Abdelnaby and Bahaa M. Kamel
Catalysts 2021, 11(7), 868; https://0-doi-org.brum.beds.ac.uk/10.3390/catal11070868 - 20 Jul 2021
Cited by 13 | Viewed by 2434
Abstract
The development of highly efficient photocatalysis has been prepared by two different methods for the photodegradation of Cr(VI) from an aqueous solution under visible light. The electrospun polyethersulfone (PES)/iron oxide (Fe3O4) and multi-wall carbon nanotubes (MWCNTs) composite nanofibers have [...] Read more.
The development of highly efficient photocatalysis has been prepared by two different methods for the photodegradation of Cr(VI) from an aqueous solution under visible light. The electrospun polyethersulfone (PES)/iron oxide (Fe3O4) and multi-wall carbon nanotubes (MWCNTs) composite nanofibers have been prepared using the electrospinning technique. The prepared materials were characterized by SEM and XRD analysis. The result reveals the successful fabrication of the composite nanofiber with uniformly and smooth nanofibers. The effect of numerous parameters were explored to investigate the effects of pH value, contact time, concentration of Cr(VI), and reusability. The MWCNTs-Fe3O4@PES composite nanofibers exhibited excellent photodegradation of Cr(VI) at pH 2 in 80 min. The photocatalysis materials are highly stable without significant reduction of the photocatalytic efficiency of Cr(VI) after five cycles. Therefore, due to its easy separation and reuse without loss of photocatalytic efficiency, the photocatalysis membrane has tremendous potential for the removal of heavy metals from aqueous solutions. Full article
(This article belongs to the Special Issue Recent Advances in Photocatalysis Technology in Europe and Asia)
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21 pages, 5669 KiB  
Article
Economic and Ultrafast Photocatalytic Degradation of Orange II Using Ceramic Powders
by Dikra Bouras, Abla Mecif, Abdelhamid Harabi, Régis Barillé, Abdel hakim Mahdjoub and Mourad Zaabat
Catalysts 2021, 11(6), 733; https://0-doi-org.brum.beds.ac.uk/10.3390/catal11060733 - 14 Jun 2021
Cited by 10 | Viewed by 2135
Abstract
Different percentages of CuO and ZnO were added into a local kaolin ceramic-based powder (DD3) with and without ZrO2. The modified powders were first characterized, then, a test for the photocatalytic degradation of dyes with orange II (OII) was carried out. [...] Read more.
Different percentages of CuO and ZnO were added into a local kaolin ceramic-based powder (DD3) with and without ZrO2. The modified powders were first characterized, then, a test for the photocatalytic degradation of dyes with orange II (OII) was carried out. The DD3 powders that were obtained with the addition of ZrO2, ZnO, and CuO, were prepared by two different methods and have shown a large and very fast photocatalytic activity. Discoloration ratios of about 93.6% and 100% were reached after 15 min and 45 min, for CuO and ZnO respectively. Finally, an alternative photocatalysis mechanism, based purely on chemical reaction processes, is proposed. The photocatalysis results with modified powders are compared with the results obtained with thin films, made with the same materials. Full article
(This article belongs to the Special Issue Recent Advances in Photocatalysis Technology in Europe and Asia)
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9 pages, 1251 KiB  
Article
Unexpected Link between the Template Purification Solvent and the Structure of Titanium Dioxide Hollow Spheres
by Tamás Gyulavári, Kata Kovács, Klára Magyari, Kornélia Baán, Anna Szabó, Gábor Veréb, Zsolt Pap and Klara Hernadi
Catalysts 2021, 11(1), 112; https://0-doi-org.brum.beds.ac.uk/10.3390/catal11010112 - 14 Jan 2021
Cited by 1 | Viewed by 1515
Abstract
Carbon spheres were applied as templates to synthesize titanium dioxide hollow spheres. The templates were purified with either ethanol or acetone, and the effects of this treatment on the properties of the resulting titania were investigated. The photocatalytic activity of the catalysts was [...] Read more.
Carbon spheres were applied as templates to synthesize titanium dioxide hollow spheres. The templates were purified with either ethanol or acetone, and the effects of this treatment on the properties of the resulting titania were investigated. The photocatalytic activity of the catalysts was measured via the decomposition of phenol model pollutant under visible light irradiation. It was found that the solvent used for the purification of the carbon spheres had a surprisingly large impact on the crystal phase composition, morphology, and photocatalytic activity. Using ethanol resulted in a predominantly rutile phase titanium dioxide with regular morphology and higher photocatalytic activity (r0,phenol = 3.9 × 10−9 M∙s−1) than that containing mainly anatase phase prepared using acetone (r0,phenol = 1.2 × 10−9 M∙s−1), surpassing the photocatalytic activity of all investigated references. Based on infrared spectroscopy measurements, it was found that the carbon sphere templates had different surface properties that could result in the appearance of carbonate species in the titania lattice. The presence or absence of these species was found to be the determining factor in the development of the titania’s properties. Full article
(This article belongs to the Special Issue Recent Advances in Photocatalysis Technology in Europe and Asia)
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