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Electrochemical Synthesis of Nanostructured Semiconductors

A special issue of Materials (ISSN 1996-1944). This special issue belongs to the section "Materials Chemistry".

Deadline for manuscript submissions: closed (10 September 2023) | Viewed by 3355

Special Issue Editor


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Guest Editor
Faculty of Chemistry, Jagiellonian University, Krakow, Poland
Interests: electrochemistry; electrochemical synthesis of nanostructured materials; anodic oxidation of metals; nanostructured semiconductors; photoelectrochemistry
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Special Issue Information

Nanostructured semiconductors have been extensively investigated for years owing to their promising properties compared to their bulk counterparts. Among various methods that have already been proposed for the fabrication of nanostructured semiconductors, electrochemical methods (e.g., the simple electrochemical oxidation (anodization) of metals or cathodic electrodeposition) are especially attractive due to their simplicity, cost-effectiveness, and versatility. Moreover, it is also possible to tailor the morphology, composition, and properties of electrochemically deposited semiconducting materials by the careful adjustment of the process parameters, especially the potential/current conditions, temperature, duration of the process, as well as composition, viscosity, pH of the electrolyte, and many others.

Therefore, in this Special Issue of Materials, we expect both regular research papers and reviews on all aspects related to electrochemical methods that can be used for the synthesis of nanostructured semiconductors. This Special Issue welcomes, but is not limited to, manuscripts on the following topics:

  • The development of new electrochemical methods (including anodic oxidation and electrodeposition) that can be employed for the formation of nanostructured semiconductors;
  • The modification and functionalization of electrochemically synthesized nanostructured semiconductors;
  • Detailed characterization of electrochemically formed nanostructured semiconductors;
  • Applications of nanostructured semiconductors in various fields, including photoelectrochemistry, photocatalysis, photovoltaics, and others.

Prof. Dr. Leszek Zaraska
Guest Editor

Manuscript Submission Information

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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. Materials 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 2600 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

  • electrodeposition
  • anodization
  • nanostructured semiconductors
  • photoelectrochemistry
  • photocatalysis

Published Papers (2 papers)

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Research

16 pages, 3224 KiB  
Article
Plasma Electrolytic Oxidation of Titanium in Ni and Cu Hydroxide Suspensions towards Preparation of Electrocatalysts for Urea Oxidation
by Marta Wala, Dorota Łubiarz, Natalia Waloszczyk and Wojciech Simka
Materials 2023, 16(6), 2191; https://doi.org/10.3390/ma16062191 - 9 Mar 2023
Cited by 1 | Viewed by 1332
Abstract
The increasing climate crisis requires an improvement in renewable energy technologies. One of them are fuel cells, devices that are capable of generating electricity directly from the chemical reaction that is taking place inside of them. Despite the advantages of these solutions, a [...] Read more.
The increasing climate crisis requires an improvement in renewable energy technologies. One of them are fuel cells, devices that are capable of generating electricity directly from the chemical reaction that is taking place inside of them. Despite the advantages of these solutions, a lack of the appropriate materials is holding them back from commercialization. This research shows preliminary results from a simple way to prepare black TiO2 coatings, doped with Cu or Ni using the plasma electrolytic oxidation process, which can be used as anodes in urea-fueled fuel cells. They show activity toward urea oxidation, with a maximum current density of 130 μA cm−2 (@1 V vs. Hg|HgO) observed for Cu-enhanced TiO2 and low potential of only 0.742 V (Vs Hg|HgO) required for 50 μA cm−2 for Ni-enhanced TiO2. These results demonstrate how the PEO process can be used for the preparation of TiO2-based doped materials with electrocatalytic properties toward urea electrooxidation. Full article
(This article belongs to the Special Issue Electrochemical Synthesis of Nanostructured Semiconductors)
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9 pages, 21967 KiB  
Article
CdS-Decorated Porous Anodic SnOx Photoanodes with Enhanced Performance under Visible Light
by Karolina Gawlak, Dominika Popiołek, Marcin Pisarek, Grzegorz D. Sulka and Leszek Zaraska
Materials 2022, 15(11), 3848; https://doi.org/10.3390/ma15113848 - 27 May 2022
Cited by 5 | Viewed by 1371
Abstract
Electrochemically generated nanoporous tin oxide films have already been studied as photoanodes in photoelectrochemical water splitting systems. However, up to now, the most significant drawback of such materials was their relatively wide band gap (ca. 3.0 eV), which limits their effective performance in [...] Read more.
Electrochemically generated nanoporous tin oxide films have already been studied as photoanodes in photoelectrochemical water splitting systems. However, up to now, the most significant drawback of such materials was their relatively wide band gap (ca. 3.0 eV), which limits their effective performance in the UV light range. Therefore, here, we present for the first time an effective strategy for sensitization of porous anodic SnOx films with another narrow band gap semiconductor. Nanoporous tin oxide layers were obtained by simple one-step anodic oxidation of metallic Sn in 1 M NaOH followed by further surface decoration with CdS by the successive ionic layer adsorption and reaction (SILAR) method. It was found that the nanoporous morphology of as-anodized SnOx is still preserved after CdS deposition. Such SnOx/CdS photoanodes exhibited enhanced photoelectrochemical activity in the visible range compared to unmodified SnOx. However, the thermal treatment at 200 °C before the SILAR process was found to be a key factor responsible for the optimal photoresponse of the material. Full article
(This article belongs to the Special Issue Electrochemical Synthesis of Nanostructured Semiconductors)
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