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Photocatalytic Degradation of Organic Pollutants and Inactivation of Microorganisms Using...
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Photocatalytic Degradation of Organic Pollutants and Inactivation of Microorganisms Using Innovative Catalysts

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

Deadline for manuscript submissions: closed (31 July 2020) | Viewed by 8802

Special Issue Editor

Prof. Dr. Ioannis Konstantinou

E-Mail Website1 Website2
Guest Editor
Laboratory of Industrial Chemistry, Department of Chemistry, University of Ioannina, 45500 Ioannina, Greece
Interests: photocatalysis; photolytic processes in the environment; photodegradation pathways; identification of phototransformation products
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

In recent years, photocatalysis has been recognized as a technology breakthrough for water treatment and purification. Photocatalytic processes can deal with the recent demands on water resources quality, providing effective technologies for the removal of emerging and recalcitrant contaminants or xenobiotics, for the treatment of industrial, municipal, and hospital wastewaters and for the inactivation of microorganisms including resistant pathogens. Photocatalytic systems can also be combined with conventional technologies using either UV-lamp or sunlight irradiation, providing a versatile and environmentally friendly technology. This Special Issue welcomes both review and original research articles on all aspects of heterogeneous and homogeneous photocatalytic processes and applications for the degradation of organic pollutants and disinfection in water and wastewater matrices.

The Special Issue will focus on, but is not limited to, photocatalysis developments and applications for:

i) new and advanced photocatalysts for water/wastewater treatment and disinfection; ii) photocatalytic mechanisms and kinetics; iii) degradation of emerging and priority pollutants such as pharmaceuticals, biocides, endocrine disruptors, flame retardants, surfactants, plasticizers, personal care products, etc.; iv) monitoring of photocatalytic processes via identification of intermediate and final degradation products; v) toxicity abatement; vi) inactivation of microorganisms; vii) solar-driven photocatalytic processes; viii) pilot and full-scale applications.

Prof. Dr. Ioannis Konstantinou
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

  • heterogeneous and homogeneous photocatalysis
  • solar photocatalysis
  • nanostructured photocatalysts
  • heterojunction photocatalysts
  • photocatalytic mechanisms and reactions
  • emerging and priority organic pollutants
  • degradation mechanisms and pathways
  • degradation and transformation products
  • toxicity abatement
  • photocatalytic disinfection
  • microorganisms inactivation
  • water/wastewater treatment
  • hybrid photocatalytic systems
  • pilot and full-scale photocatalytic applications

Published Papers (2 papers)

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Research

21 pages, 3682 KiB  
Article
Facile One-Pot Biogenic Synthesis of Cu-Co-Ni Trimetallic Nanoparticles for Enhanced Photocatalytic Dye Degradation
by Abdulmohsen Ali Alshehri and Maqsood Ahmad Malik
Catalysts 2020, 10(10), 1138; https://doi.org/10.3390/catal10101138 - 02 Oct 2020
Cited by 31 | Viewed by 3579
Abstract
Biomolecules from plant extracts have gained significant interest in the synthesis of nanoparticles owing to their sustainable properties, cost efficiency, and environmental wellbeing. An eco-friendly and facile method has been developed to prepare Cu-Co-Ni trimetallic nanoparticles with simultaneous bio-reduction of Cu-Co-Ni metal precursors [...] Read more.
Biomolecules from plant extracts have gained significant interest in the synthesis of nanoparticles owing to their sustainable properties, cost efficiency, and environmental wellbeing. An eco-friendly and facile method has been developed to prepare Cu-Co-Ni trimetallic nanoparticles with simultaneous bio-reduction of Cu-Co-Ni metal precursors by aqueous extract of oregano (Origanum vulgare) leaves. Dramatic changes in physicochemical properties of trimetallic nanoparticles occur due to synergistic interactions between individual metal precursors, which in turn outclass the properties of corresponding monometallic nanoparticles in various aspects. The as biosynthesized Cu-Co-Ni trimetallic nanoparticles were initially analyzed using ultraviolet (UV)–visible spectroscopy. The morphology, structure, shape, and size of biosynthesized trimetallic nanoparticles were confirmed by transmission electron microscopy (TEM), scanning electron microscopy (SEM), and X-ray diffraction (XRD) spectroscopy. The elemental analysis was carried out by energy-dispersive X-ray (EDX) spectroscopy. Fourier transform infrared (FTIR) microscopy was carried out to explain the critical role of the biomolecules in the Origanum vulgare leaf extract as capping and stabilizing agents in the nanoparticle formation. Additionally, simultaneous thermogravimetric analysis (TGA) and differential thermogravimetry (DTG) analysis was also performed to estimate the mass evaluation and rate of the material weight changes. The photocatalytic activity of as biosynthesized trimetallic nanoparticles was investigated towards methylene blue (MB) dye degradation and was found to be an efficient photocatalyst for dye degradation. Kinetic experiments have shown that photocatalytic degradation of MB dye followed pseudo-first-order kinetics. The mechanism of the photodegradation process of biogenic Cu-Co-Ni trimetallic nanoparticles was also addressed. Full article
(This article belongs to the Special Issue Photocatalytic Degradation of Organic Pollutants and Inactivation of Microorganisms Using Innovative Catalysts)
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14 pages, 4268 KiB  
Article
Enhanced Performance of Electrospun Nanofibrous TiO2/g-C3N4 Photocatalyst in Photocatalytic Degradation of Methylene Blue
by Feidias Bairamis, Ioannis Konstantinou, Dimitrios Petrakis and Tiverios Vaimakis
Catalysts 2019, 9(11), 880; https://doi.org/10.3390/catal9110880 - 24 Oct 2019
Cited by 22 | Viewed by 4414
Abstract
TiO2/g-C3N4 (GNT) fibers with 1%, 2.5% and 5% (wt%) ratios have been synthesized via one-step electrospinning using polyvinylpyrrolidone (PVP) polymer. Results showed mesoporous fibrous catalysts consisted of anatase (80.0–85.1%) and rutile phase (14.9–20.0%), with diameter between 200–300 nm [...] Read more.
TiO2/g-C3N4 (GNT) fibers with 1%, 2.5% and 5% (wt%) ratios have been synthesized via one-step electrospinning using polyvinylpyrrolidone (PVP) polymer. Results showed mesoporous fibrous catalysts consisted of anatase (80.0–85.1%) and rutile phase (14.9–20.0%), with diameter between 200–300 nm and band gap lower than 3.0 eV confirming the absorption shift to visible-light region. The formation of •OH radicals and methylene blue dye degradation increases as the g-C3N4 doping percent also increases, following the trend ΤiO2 < GNT1% ≈ GNT2.5% < GNT5%. A z-scheme mechanism is attributed to the photocatalytic performance confirming the potential for green chemistry and environmental technology applications. Full article
(This article belongs to the Special Issue Photocatalytic Degradation of Organic Pollutants and Inactivation of Microorganisms Using Innovative Catalysts)
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