Special Issue "Photocatalytic Nanomaterials for Pollutant Remediation"

A special issue of Nanomaterials (ISSN 2079-4991).

Deadline for manuscript submissions: 15 December 2020.

Special Issue Editor

Prof. Dr. Giuseppe Marcì
Website
Guest Editor
Department Engineering, University of Palermo, Italy
Interests: Preparation, characterisation (bulk and surface techniques) and photocatalytic activity of photocatalysts for pollutants degradation, partial oxidation reactions to obtain high-value-added materials and H2O and CO2 photo-reduction
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Special Issue Information

Dear Colleagues,

The “Photocatalytic Nanomaterials for Pollutant Remediation” Special Issue aims to collect articles regarding the preparation of new photocatalysts as powders or thin films (bare and loaded semiconductors or materials obtained by coupling different semiconductors) for the abatement of pollutants present both in gas-phase and in aqueous solutions. Research concerning the modelling and development of new photoreactors, including solar photoreactors, for pollutants remediation will be also considered for publication. Articles concerning the degradation of emergent micro- or nano-pollutants, like drugs or PFAS, will be particularly welcome; on the contrary, articles reporting the degradation of dyes, even for testing new materials, will be not considered.

Prof. Dr. Giuseppe Marcì
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 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. Nanomaterials 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 2000 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

  • Pollutants remediation in gas phase
  • Pollutants remediation in water solution
  • Solar photoreactors
  • Photocatalysts preparation and characterization
  • Coupled photocatalysts
  • Fenton-like processes in heterogeneous regime
  • Photocatalysis coupled with ozonation technologies
  • Photocatalysis coupled with electrochemical processes
  • Heterogeneous photocatalysis for disinfection
  • Pilot-scale studies and field applications

Published Papers (2 papers)

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Research

Open AccessArticle
Paper Functionalized with Nanostructured TiO2/AgBr: Photocatalytic Degradation of 2–Propanol under Solar Light Irradiation and Antibacterial Activity
Nanomaterials 2020, 10(3), 470; https://doi.org/10.3390/nano10030470 - 05 Mar 2020
Abstract
A facile method to produce paper–TiO2 decorated with AgBr nanoparticles by a mild hydrothermal process at 140 °C was reported. The synthesis method was based on the immersion of the paper in a ready-made suspension of TiO2/AgBr, comprising TiO2 [...] Read more.
A facile method to produce paper–TiO2 decorated with AgBr nanoparticles by a mild hydrothermal process at 140 °C was reported. The synthesis method was based on the immersion of the paper in a ready-made suspension of TiO2/AgBr, comprising TiO2 sol solution prepared in acidic conditions and AgBr solution (10−4 M). A paper–TiO2 sample was prepared and used as reference. The formation of crystalline phases of titanium oxide (TiO2) and silver bromide (AgBr) was demonstrated by XRD, Raman and EDX analyses. The surface morphology of the TiO2–AgBr was investigated by Field Effect Scanning Electronic Microscopy (FE–SEM). The photocatalytic performances of the prepared material were evaluated in the degradation of 2-propanol in the gas phase, under simulated sunlight illumination. Its antibacterial properties against Escherichia coli (E. coli) were also assessed. The efficiency of photodegradation and the anti-bacterial properties of paper–TiO2–AgBr were attributed to an improvement in the absorption of visible light, the increased production of reactive oxygen species (ROS) and the low recombination of photogenerated charge carriers due to the synergistic effect between TiO2 and AgBr/Ag nanoparticles. Full article
(This article belongs to the Special Issue Photocatalytic Nanomaterials for Pollutant Remediation)
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Open AccessArticle
Facile Fabrication of Flower-Like BiOI/BiOCOOH p–n Heterojunctions for Highly Efficient Visible-Light-Driven Photocatalytic Removal of Harmful Antibiotics
Nanomaterials 2019, 9(11), 1571; https://doi.org/10.3390/nano9111571 - 06 Nov 2019
Abstract
Novel heterojunction photocatalysts with remarkable photocatalytic capabilities and durability for degrading recalcitrant contaminants are extremely desired; however, their development still remains quite challenging. In this study, a series of flower-like BiOI/BiOCOOH p–n heterojunctions were fabricated via a controlled in situ anion-exchange process. During [...] Read more.
Novel heterojunction photocatalysts with remarkable photocatalytic capabilities and durability for degrading recalcitrant contaminants are extremely desired; however, their development still remains quite challenging. In this study, a series of flower-like BiOI/BiOCOOH p–n heterojunctions were fabricated via a controlled in situ anion-exchange process. During the process, BiOI formation and even deposition on BiOCOOH microspheres with tight interfacial contact were realized. As expected, BiOI/BiOCOOH heterojunctions revealed remarkable enhancements in photocatalytic antibiotic degradation capacities under visible light irradiation compared with pristine BiOI and BiOCOOH. The best-performing BiOI/BiOCOOH heterojunction (i.e., IBOCH-2) showed much improved photocatalytic CIP degradation efficiency of approximately 81- and 3.9-fold greater than those of bare BiOI and BiOCOOH, respectively. The eminent photocatalytic performances were due not only to the enhanced capability in harvesting photon energies in visible light regions, but also the accelerated separation of electrons and holes boosted by the p–n heterojunction. Active species trapping tests demonstrated that superoxide free radicals (•O2) and photo-generated holes (h+) were major active species for CIP degradation. Recycling experiments verified the good durability of BIBO-2 over four runs. The facile in situ synthesis route and excellent performance endow flower-like BiOI/BiOCOOH heterojunctions with a promising potential for actual environmental remediation. Full article
(This article belongs to the Special Issue Photocatalytic Nanomaterials for Pollutant Remediation)
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Planned Papers

The below list represents only planned manuscripts. Some of these manuscripts have not been received by the Editorial Office yet. Papers submitted to MDPI journals are subject to peer-review.

Title: Photocatalytic activity of core-shell nanoparticles [email protected], prepared by reactive deposition in aerosol micro droplets
Authors: Dvorsky, Richard
Affiliation: VSB – Technical University of Ostrava, Ostrava, Czech Republic
Abstract: A very important problem of current nanotechnology is the practical handling of powder photocatalytic materials. When the size of nanoparticles is in the order of tens nm, their extraction from the liquid dispersion to a state of a dry powder is highly problematic. The thickening and subsequent drying of the dispersion leads to significant agglomeration and larger particles are formed. As a result of the exciton recombination, the internal volume of the particles contributes to the photocatalytic process significantly less than their external surface area. The aim of this work is the application of a new patented technology of "aerosol microreactors", which enables preparation of photocatalytic core-shell nanostructure on carrier particles of inactive material. The "aerosol microreactors" method allows controlled deposition of the photocatalytic coating of the desired thickness onto carrier particles dispersed in the microdroplets of a single reactant solution. These microreactors are generated in an ultrasonic nebulizer in the order of micron dimensions. To test the function of the "aerosol microreactors" method, a [email protected] core-shell photocatalytic nanoparticle powder was prepared on Si carrier particles resulting from the disintegration of semiconductor silicon in a Water Jet Mill. The experiment confirmed a very good match between the required and the real thickness of the semiconductor shell. In contrast to the ZnS nanoparticle liquid dispersion that is difficult to handle, the new method allowed the preparation of dry photocatalytic nanopowder. The new powdered material has shown good photocatalytic efficiency in both the liquid environment in phenol degradation and the gaseous environment in N2O degradation.

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