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Molecules
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Nanomaterial Applications: Electrochemical Analysis and Material Characterization
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Nanomaterial Applications: Electrochemical Analysis and Material Characterization

A special issue of Molecules (ISSN 1420-3049). This special issue belongs to the section "Materials Chemistry".

Deadline for manuscript submissions: closed (15 January 2024) | Viewed by 4073

Special Issue Editor

Prof. Dr. Amany M. Fekry

E-Mail Website
Guest Editor
1. CNRS, GeoRessources, Université de Lorraine, 54000 Nancy, France
2. Department of Chemistry, Faculty of Science, Cairo University, Giza 12613, Egypt
Interests: corrosion; nanomaterials; electrochemical impedance spectroscopy (EIS); potentiodynamic polarization; coatings; XRD; TEM; EDX

Special Issue Information

Dear Colleagues,

The focus of this Special Issue is to evaluate the influence of nanomaterials as coatings on the corrosion behavior of alloy surfaces tbefore industrial and biological use . Herein, the aim is to chemically or electrochemically deposit nanocoatings on alloy surfaces and study their corrosion behavior. The effect of this nanomaterial as a coating utilizing electrochemical impedance spectroscopy (EIS) and potentiodynamic polarization techniques can be analyzed by determining the impedance and corrosion current density values of the coating and examining its inhibition efficiency. Additionally, this synthesized coating can be characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), energy-dispersive X-ray analyses (EDX), Raman spectroscopy analysis, etc. This Special Issue will contain articles that effectively demonstrate the behavior of the coating towards corrosion, demonstrating coatings that accurately improve the corrosion protection of the alloy surface. These studies must clearly show the significance of this coating and its application whether industrial or biological. This includes industrial alloys used in tanks or pipelines and biological alloys used as implants for bone or dental applications. 

This Special Issue of Molecules is related to the composition of a nanomaterial and its effect as a coating for the corrosion protection of an alloy's surface. The articles selected for this Special Issue must give an overview of the current scientific and technological importance of these alloys (see the Keywords/Topics below). Your participation in this Special Issue is highly appreciated, and we invite you to contribute research that estimates the effect of a nanomaterial on the behavior of alloys. Contributions will be considered noteworthy if they represent innovation in the research fields of nanomaterials and advanced coatings.

Prof. Dr. Amany M. Fekry
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. Molecules 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 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

  • corrosion
  • nanomaterials
  • electrochemical impedance spectroscopy (EIS)
  • potentiodynamic polarization
  • coatings
  • XRD
  • TEM
  • EDX

Published Papers (2 papers)

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Research

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16 pages, 4656 KiB  
Article
Using Sandwiched Silicon/Reduced Graphene Oxide Composites with Dual Hybridization for Their Stable Lithium Storage Properties
by Yuying Yang, Rui Zhang, Qiang Zhang, Liu Feng, Guangwu Wen, Lu-Chang Qin and Dong Wang
Molecules 2024, 29(10), 2178; https://doi.org/10.3390/molecules29102178 - 7 May 2024
Viewed by 290
Abstract
Using silicon/reduced graphene oxide (Si/rGO) composites as lithium-ion battery (LIB) anodes can effectively buffer the volumetric expansion and shrinkage of Si. Herein, we designed and prepared Si/rGO-b with a sandwiched structure, formed by a duple combination of ammonia-modified silicon (m-Si) nanoparticles (NP) with [...] Read more.
Using silicon/reduced graphene oxide (Si/rGO) composites as lithium-ion battery (LIB) anodes can effectively buffer the volumetric expansion and shrinkage of Si. Herein, we designed and prepared Si/rGO-b with a sandwiched structure, formed by a duple combination of ammonia-modified silicon (m-Si) nanoparticles (NP) with graphene oxide (GO). In the first composite process of m-Si and GO, a core–shell structure of primal Si/rGO-b (p-Si/rGO-b) was formed. The amino groups on the m-Si surface can not only hybridize with the GO surface to fix the Si particles, but also form covalent chemical bonds with the remaining carboxyl groups of rGO to enhance the stability of the composite. During the electrochemical reaction, the oxygen on the m-Si surface reacts with lithium ions (Li+) to form Li2O, which is a component of the solid–electrolyte interphase (SEI) and is beneficial to buffering the volume expansion of Si. Then, the p-Si/rGO-b recombines with GO again to finally form a sandwiched structure of Si/rGO-b. Covalent chemical bonds are formed between the rGO layers to tightly fix the p-Si/rGO-b, and the conductive network formed by the reintroduced rGO improves the conductivity of the Si/rGO-b composite. When used as an electrode, the Si/rGO-b composite exhibits excellent cycling performance (operated stably for more than 800 cycles at a high-capacity retention rate of 82.4%) and a superior rate capability (300 mA h/g at 5 A/g). After cycling, tiny cracks formed in some areas of the electrode surface, with an expansion rate of only 27.4%. The duple combination of rGO and the unique sandwiched structure presented here demonstrate great effectiveness in improving the electrochemical performance of alloy-type anodes. Full article
(This article belongs to the Special Issue Nanomaterial Applications: Electrochemical Analysis and Material Characterization)
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Review

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30 pages, 2536 KiB  
Review
Advances in the Modification of Silane-Based Sol-Gel Coating to Improve the Corrosion Resistance of Magnesium Alloys
by Jiao Li, Huanhuan Bai and Zhiyuan Feng
Molecules 2023, 28(6), 2563; https://doi.org/10.3390/molecules28062563 - 11 Mar 2023
Cited by 9 | Viewed by 3330
Abstract
As the lightest structural materials, magnesium (Mg) alloys play a significant role in vehicle weight reduction, aerospace, military equipment, energy saving, and emission reduction. However, the poor corrosion resistance of Mg alloys has become a bottleneck restricting its wide application. Developing a good [...] Read more.
As the lightest structural materials, magnesium (Mg) alloys play a significant role in vehicle weight reduction, aerospace, military equipment, energy saving, and emission reduction. However, the poor corrosion resistance of Mg alloys has become a bottleneck restricting its wide application. Developing a good surface protective coating can effectively improve the corrosion resistance of Mg alloys. The silane-based sol-gel coating technology has been widely used in the corrosion protection of Mg alloys in recent years due to its advantages of simple process, accessible tailoring of film composition and structure, and excellent corrosion resistance. Whereas the synthesis of sol-gel coatings includes the hydrolysis and dehydration process, which may inherently contain micron or nano defects in the coatings, thereby making it detrimental to the anti-corrosion effect. Therefore, in order to enhance their protection against corrosion, the appropriate modification of sol-gel coatings has become a current research hotspot. This review is based on the modification methods of silane-based sol-gels on the surface of Mg alloys, which are divided into four categories: bare sol-gel, nanoparticles, corrosion inhibitors, and sol-gel-based composite coatings. The modification methods and corrosion protection mechanism are discussed respectively, and the application, development, and research strategies of silane-based sol-gel coatings are included. Full article
(This article belongs to the Special Issue Nanomaterial Applications: Electrochemical Analysis and Material Characterization)
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