Special Issue "Photocatalytic Nanocomposite Materials"

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

Deadline for manuscript submissions: 31 December 2019

Special Issue Editors

Guest Editor
Prof. Dr. Detlef W. Bahnemann

Gottfried Wilhelm Leibniz Universitat, Institute of Technical Chemistry, Hannover, Germany and Head of Laboratory ”Photoactive Nanocomposite Materials”, Saint-Petersburg State University, St.-Petersburg, Russia
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Interests: photo catalysis; self-cleaning; superhydrophilic; antibacterial surfaces; metal and semiconductor particles; nanocristalyne transparent coatings; functional test according to DIN; CEN and ISO
Guest Editor
Prof. Dr. Alexei Emeline

Saint Petersburg State University, Department of Photonics and Laboratory ”Photoactive Nanocomposite Materials”, Saint-Petersburg State University, St.-Petersburg, Russia
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Interests: physics and chemistry of photostimulated interfacial processes in heterogeneous systems, heterogeneous photocatalysis. solar light energy conversion. nanocomposite photoactive materials, experimental and theoretical studies of activity and selectivity of photoactive nanomaterials. self-cleaning photoactive coatings. luminescence materials. photoinduced defect formation in solids, photoelectrochemistry, photovoltaics
Guest Editor
Dr. Aida Rudakova

Head of the Division “Synthesis of Photoactive Materials”, Laboratory “Photoactive Nanocomposite Materials”, Saint-Petersburg State University, Russia
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Interests: Catalysis, photocatalysis, design and characterization of photoactive nanocomposite materials, IR and Raman spectroscopy, UV-Vis spectroscopy, luminescence, adsorption, photoinduced hydrophilicity, surface properties, functional coatings
Guest Editor
Dr. Kirill M. Bulanin

Department of Photonics and Laboratory “Photoactive Nanocomposite Materials”, Saint-Petersburg State University, St.-Petersburg, Russia
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Interests: Mechanisms of photoprocesses in heterogeneous systems, Adsorption, photosorption, vibrational spectroscopy, heterogeneous catalysis, intermolecular interactions
Guest Editor
Dr. Ruslan Mikhaylov

Saint Petersburg State University, Department of Photonics and Laboratory “Photoactive Nanocomposite Materials”, Saint-Petersburg State University, St.-Petersburg, Russia
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Special Issue Information

Dear Colleagues,

This Special Issue of "Photocatalytic Nanocomposite Materials" (PNMs) is devoted to the research into new-generation PNMs, particularly for the processes of solar radiation energy conversion.

Submissions to this Special Issue on “Photocatalytic Nanocomposite Materials” are welcome in the form of original research papers and/or short reviews that reflect the current state of research in the PNM field on the following topics:

  • Design of PNMs;
  • Instrumental methods for investigations of PNMs;
  • Theoretical and experimental studies of the mechanisms of photoprocesses involving PNMs;
  • Photoelectrochemistry of PNMs;
  • Applications of PNMs;
  • Functional coatings based on PNMs;

The focus of this Special Issue will be on the physicochemical principles of creating new materials with purposeful properties for their specific applications. We expect to publish the results of studies that report the true quantities characterizing PNMs instead of “quasi”, “pseudo” and “apparent” characteristics, the true mechanisms strongly supported by experimental and theoretical data instead of believed ones, sophisticated state-of-art experimental methods to explore the new materials, the studies of real photocatalytic processes rather than dye photodegradation, and so on.

The issue will be attractive to researchers whose activities belong to the areas of physical chemistry, materials science, applied and environmental science, focusing on the studies of photocatalytic processes and who are interested in the true development of the science of photocatalysis.

Prof. Dr. Detlef W. Bahnemann
Prof. Dr. Alexei Emeline
Dr. Aida Rudakova
Dr. Kirill M. Bulanin
Dr. Ruslan Mikhaylov
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

  • Photocatalysis
  • Nanostructure
  • Heterojunction
  • Z-scheme
  • Localized surface plasmon resonance
  • Computational studies
  • Reaction mechanism, sustainability
  • Solar energy
  • In situ measurements
  • Photoelectrochemistry
  • Photocatalysts application

Published Papers (3 papers)

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Research

Open AccessArticle Characterization and Effect of Ag(0) vs. Ag(I) Species and Their Localized Plasmon Resonance on Photochemically Inactive TiO2
Catalysts 2019, 9(4), 323; https://doi.org/10.3390/catal9040323
Received: 21 February 2019 / Revised: 15 March 2019 / Accepted: 25 March 2019 / Published: 2 April 2019
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Abstract
Commercial TiO2 (anatase) was successfully modified with Ag nanoparticles at different nominal loadings (1%–4%) using a liquid impregnation method. The prepared materials retained the anatase structure and contained a mixture of Ag0 and AgI species. Samples exhibited extended light absorption [...] Read more.
Commercial TiO2 (anatase) was successfully modified with Ag nanoparticles at different nominal loadings (1%–4%) using a liquid impregnation method. The prepared materials retained the anatase structure and contained a mixture of Ag0 and AgI species. Samples exhibited extended light absorption to the visible region. The effect of Ag loading on TiO2 is studied for the photocatalytic reduction of CO2 to CH4 in a gas–solid process under high-purity conditions. It is remarkable that the reference TiO2 used in this work is entirely inactive in this reaction, but it allows for studying the effect of Ag on the photocatalytic process in more detail. Only in the case of 2% Ag/TiO2 was the formation of CH4 from CO2 observed. Using different light sources, an influence of the localized surface plasmon resonance (LSPR) effect of Ag is verified. A sample in which all Ag has been reduced to the metallic state was less active than the respective sample containing both Ag0 and Ag+, indicating that a mixed oxidation state is beneficial for photocatalytic performance. These results contribute to a better understanding of the effect of metal modification of TiO2 in photocatalytic CO2 reduction. Full article
(This article belongs to the Special Issue Photocatalytic Nanocomposite Materials)
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Figure 1

Open AccessArticle Enhanced Visible Light Photocatalytic Reduction of Cr(VI) over a Novel Square Nanotube Poly(Triazine Imide)/TiO2 Heterojunction
Catalysts 2019, 9(1), 55; https://doi.org/10.3390/catal9010055
Received: 28 November 2018 / Revised: 3 January 2019 / Accepted: 3 January 2019 / Published: 8 January 2019
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Abstract
Hexavalent chromium Cr(VI) pollution makes has a harmful impact on human health and the ecological environment. Photocatalysis reduction technology exhibits low energy consumption, high reduction efficiency and stable performance, and is playing an increasingly important role in chromium pollution control. Graphite-phase carbon nitride [...] Read more.
Hexavalent chromium Cr(VI) pollution makes has a harmful impact on human health and the ecological environment. Photocatalysis reduction technology exhibits low energy consumption, high reduction efficiency and stable performance, and is playing an increasingly important role in chromium pollution control. Graphite-phase carbon nitride has been used to reduce Cr(VI) to the less harmful Cr(III) due to its visible light catalytic activity, chemical stability and low cost. However, it has a low specific surface area and fast recombination of electron–hole pairs, which severely restrict its practical application. In this work, a TiO2-modified poly(triazine imide) (PTI) square nanotube was prepared by the one-step molten salts method. The results showed the PTI had a square hollow nanotube morphology, with an about 100–1000 nm width and 60–70 nm thickness. During the formation of the PTI square tube, TiO2 nanoparticles adhere to the surface of the square tube wall by strong adsorption, and eventually form a PTI/TiO2 heterojunction. The PTI/TiO2-7 wt% heterojunction exhibited very good Cr(VI) reduction efficiency within 120 min. The enhanced photocatalytic activity was mainly attributed to the efficient separation and transport of photo-induced electron–hole pairs and the high specific surface area in the heterojunction structure. Full article
(This article belongs to the Special Issue Photocatalytic Nanocomposite Materials)
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Figure 1

Open AccessArticle Network Structured CuWO4/BiVO4/Co-Pi Nanocomposite for Solar Water Splitting
Catalysts 2018, 8(12), 663; https://doi.org/10.3390/catal8120663
Received: 22 November 2018 / Revised: 12 December 2018 / Accepted: 13 December 2018 / Published: 17 December 2018
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Abstract
A network structured CuWO4/BiVO4 nanocomposite with a high specific surface area was prepared from CuWO4 nanoflake (NF) arrays via a method that combined drop-casting and thermal annealing. The obtained CuWO4/BiVO4 exhibited high catalytic activity toward photoelectrochemical [...] Read more.
A network structured CuWO4/BiVO4 nanocomposite with a high specific surface area was prepared from CuWO4 nanoflake (NF) arrays via a method that combined drop-casting and thermal annealing. The obtained CuWO4/BiVO4 exhibited high catalytic activity toward photoelectrochemical (PEC) water oxidation. When cobalt phosphate (Co-Pi) was coupled with CuWO4/BiVO4, the activity of the resulting CuWO4/BiVO4/Co-Pi composite for the oxygen evolution reaction (OER) was further improved. The photocurrent density (Jph) for OER on CuWO4/BiVO4/Co-Pi is among the highest reported on a CuWO4-based photoanode in a neutral solution. The high activity for the PEC OER was attributed to the high specific surface area of the composite, the formation of a CuWO4/BiVO4 heterojunction that accelerated electron–hole separation, and the coupling of the Co-Pi co-catalyst with CuWO4/BiVO4, which improved the charge transfer rate across composite/solution interface. Full article
(This article belongs to the Special Issue Photocatalytic Nanocomposite Materials)
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Graphical abstract

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: Facile synthesis and visible light photocatalytic properties of Ag3PO4/MoS2 nanosheets heterojunction via a ball-milling method

Author: Xin Yan*, Guotao Ning*, Jintong Li, Haofei Zhou (School of Materials Science and Engineering, Chang’an University, Xi’an, 710064, P.R. China)
Abstract: Semiconductor photocatalytic technology can convert solar energy into electrical energy and chemical energy. It can benefit effectively degrade and eliminate harmful pollutants and become one of the hot field of environmental protection. Silver phosphate (Ag3PO4) has attracted attention due to its excellent visible light catalytic properties. However, in the process of photocatalytic reaction, Ag3PO4 is susceptible to photo-corrosion and becomes unstable, which limits its application. In this work, Ag3PO4/MoS2 nanosheets heterojunction were prepared by a ball-milling method. The results indicated that Ag3PO4 nanoparticles were successfully coupled into the MoS2 nanosheets to form Ag3PO4/MoS2 heterojunction. The photocatalytic activities were evaluated by degradation of RhB under visible light irradiation. The Ag3PO4/0.5%-MoS2 nanosheets heterojunction exhibits the highest photocatalytic activity, which can degrade 98% RhB under visible-light irradiation within 30 min. The recycling experiments showed that the activity of Ag3PO4/0.5%-MoS2 nanosheets composites was maintained at about 90% after 5 cycles, while the photocatalytic activity of the Ag3PO4 decreased to 43%. The enhanced photocatalytic activity is mainly attributed to the efficient separation and transport of photoinduced electron-hole pairs in the heterojunction structure. A possible Z-type mechanism is proposed based on the results of trapping experiment and the band theory of semiconductors.

 

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