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Synthesis and Properties of Nano-Based Composites
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Synthesis and Properties of Nano-Based Composites

A special issue of Materials (ISSN 1996-1944).

Deadline for manuscript submissions: closed (30 September 2020) | Viewed by 14332

Special Issue Editors

Dr. Ondřej Jankovský

E-Mail Website
Guest Editor
Department of Inorganic Chemistry, Faculty of Chemical Technology, University of Chemistry and Technology, Technická 5, 166 28 Prague 6, Czech Republic
Interests: inorganic chemistry; composites; graphene-based materials; thermodynamics
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Zbyšek Pavlík

E-Mail Website
Co-Guest Editor
Department of Materials Engineering and Chemistry, Faculty of Civil Engineering, Czech Technical University in Prague, Thákurova 7, 166 29 Prague, Czech Republic
Interests: design, development and testing of new materials for construction use; waste to materials; low energy materials; pozzolanic materials; buildings physics
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

The Special Issue “Synthesis and Properties of Nano-Based Composites” is aimed at the preparation and characterization of high-performance composites containing different nano-additives. Nowadays, the study of various 0D, 1D, or 2D materials is in the forefront of world-wide research; however, the use of these materials in the final products is often problematic, not only because of the high prices of nanomaterials, but also because of their inconsiderable impact on the environment. On the other hand, the use of these materials in composites is reasonable, because usually, only a low content of nanomaterials can strongly influence the material properties.

This Special Issue will include composites containing 1D nanomaterials (CNTs), 2D layered nanomaterials (graphene, graphene oxides, etc.), nanostructured oxides, and others nanomaterials. Hence, proposed topics include, but are not limited to, the following:

  • Graphene-based composites
  • Graphene oxide-based composites
  • CNT-based composites
  • Cement-based materials with nano-additives
  • High-temperature superconductors with nanoscale pinning centers
  • Nano-based thermoelectrics
  • Carbon-bonded alumina refractories with various nano-additives
  • New trends in nano-based composites
  • Environmental aspects of nano-based composites
  • Construction materials with nano-additives
  • Hygrothermal performance and durability of nano-based composites
  • Application of nano-materials in the repair of culture heritage buildings and structures.

We believe that this topic is very real and interesting, and hence, we invite you to submit your contributions to this Special Issue with the best of your research activities.

Prof. Ondřej Jankovský
Prof. Zbyšek Pavlík
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 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. 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

  • nano-based composites
  • carbon-based nanomaterialals
  • advanced mixed oxides composites
  • composites in building chemistry
  • durability and mechanical performance of nano-based composites

Published Papers (5 papers)

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Research

10 pages, 4518 KiB  
Article
The Effect of Nanosizing on the Oxidation of Partially Oxidized Copper Nanoparticles
by Jindřich Leitner, David Sedmidubský, Michal Lojka and Ondřej Jankovský
Materials 2020, 13(12), 2878; https://doi.org/10.3390/ma13122878 - 26 Jun 2020
Cited by 10 | Viewed by 2885
Abstract
Copper nanoparticles are of great interest in various applications, such as catalysis, cooling fluids, conductive inks or for their antibacterial activity. In this paper, the thermal behavior of copper nanoparticles was studied using thermogravimetry, differential thermal analysis and differential scanning calorimetry. Original Cu [...] Read more.
Copper nanoparticles are of great interest in various applications, such as catalysis, cooling fluids, conductive inks or for their antibacterial activity. In this paper, the thermal behavior of copper nanoparticles was studied using thermogravimetry, differential thermal analysis and differential scanning calorimetry. Original Cu samples as well as the products of oxidation were analysed by X-ray diffraction, scanning/transmission electron microscopy and energy dispersive spectroscopy. A step-by-step oxidation mechanism during the oxidation of Cu nano-powders was observed. The Cu-nano oxidation starts slightly above 150 °C when bulk copper does not yet react. The dominant oxidation product in the first step is Cu2O while CuO was identified as the final state of oxidation. Our results confirm an easier oxidation process of Cu-nano than Cu-micro particles, which must be attributed to kinetic not thermodynamic aspects of oxidation reactions. Full article
(This article belongs to the Special Issue Synthesis and Properties of Nano-Based Composites)
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10 pages, 3626 KiB  
Article
Carbon-Bonded Alumina Filters Coated by Graphene Oxide for Water Treatment
by Ondřej Jankovský, Michal Lojka, Adéla Jiříčková, Christos G. Aneziris, Enrico Storti and David Sedmidubský
Materials 2020, 13(8), 2006; https://doi.org/10.3390/ma13082006 - 24 Apr 2020
Cited by 4 | Viewed by 3134
Abstract
The aim of this paper is to prepare nano-functionalized ceramic foam filters from carbon-bonded alumina. The carbon-bonded filters were produced via the Schwartzwalder process using a two-step approach. The prepared ceramic foam filters were further coated using graphene oxide. Graphene oxide was prepared [...] Read more.
The aim of this paper is to prepare nano-functionalized ceramic foam filters from carbon-bonded alumina. The carbon-bonded filters were produced via the Schwartzwalder process using a two-step approach. The prepared ceramic foam filters were further coated using graphene oxide. Graphene oxide was prepared by the modified Tour method. The C/O of the graphene oxide ratio was evaluated by XPS, EDS and elemental analysis (EA). The amount and type of individual oxygen functionalities were characterized by XPS and Raman spectroscopy. The microstructure was studied by TEM, and XRD was used to evaluate the interlayer distance. In the next step, filters were coated by graphene oxide using dip-coating. After drying, the prepared composite filters were used for the purification of the water containing lead, zinc and cadmium ions. The efficiency of the sorption was very high, suggesting the potential use of these materials for the treatment of wastewater from heavy metals. Full article
(This article belongs to the Special Issue Synthesis and Properties of Nano-Based Composites)
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12 pages, 3029 KiB  
Article
Thermal Stability and Kinetics of Formation of Magnesium Oxychloride Phase 3Mg(OH)2∙MgCl2∙8H2O
by Michal Lojka, Ondřej Jankovský, Adéla Jiříčková, Anna-Marie Lauermannová, Filip Antončík, David Sedmidubský, Zbyšek Pavlík and Milena Pavlíková
Materials 2020, 13(3), 767; https://doi.org/10.3390/ma13030767 - 7 Feb 2020
Cited by 29 | Viewed by 2728
Abstract
In this paper, magnesium oxychloride cement with stoichiometry 3Mg(OH)2∙MgCl2∙8H2O (MOC 3-1-8) was prepared and characterized. The phase composition and kinetics of formation were studied by X-ray diffraction (XRD) and Rietveld analysis of obtained diffractograms. The chemical composition [...] Read more.
In this paper, magnesium oxychloride cement with stoichiometry 3Mg(OH)2∙MgCl2∙8H2O (MOC 3-1-8) was prepared and characterized. The phase composition and kinetics of formation were studied by X-ray diffraction (XRD) and Rietveld analysis of obtained diffractograms. The chemical composition was analyzed using X-ray fluorescence (XRF) and energy dispersive spectroscopy (EDS). Furthermore, scanning electron microscopy (SEM) was used to study morphology, and Fourier Transform Infrared (FT-IR) spectroscopy was also used for the analysis of the prepared sample. In addition, thermal stability was tested using simultaneous thermal analysis (STA) combined with mass spectroscopy (MS). The obtained data gave evidence of the fast formation of MOC 3-1-8, which started to precipitate rapidly. As the length of the time of ripening increased, the amount of MgO decreased, while the amount of MOC 3-1-8 increased. The fast formation of the MOC 3-1-8 phase at an ambient temperature is important for its application in the production of low-energy construction materials, which corresponds with the challenges of a sustainable building industry. Full article
(This article belongs to the Special Issue Synthesis and Properties of Nano-Based Composites)
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11 pages, 13952 KiB  
Article
Thermodynamic Properties of Stoichiometric Non-Superconducting Phase Y2BaCuO5
by Filip Antončík, David Sedmidubský, Adéla Jiříčková, Michal Lojka, Tomáš Hlásek, Květoslav Růžička and Ondřej Jankovský
Materials 2019, 12(19), 3163; https://doi.org/10.3390/ma12193163 - 27 Sep 2019
Cited by 1 | Viewed by 2078
Abstract
Y2BaCuO5 often occurs as an accompanying phase of the well-known high-temperature superconductor YBa2Cu3O7 (also known as YBCO). Y2BaCuO5, easily identifiable due to its characteristic green coloration, is often referred to as [...] Read more.
Y2BaCuO5 often occurs as an accompanying phase of the well-known high-temperature superconductor YBa2Cu3O7 (also known as YBCO). Y2BaCuO5, easily identifiable due to its characteristic green coloration, is often referred to as ‘green phase’ or ‘Y-211’. In this contribution, Y2BaCuO5 phase was studied in detail with a focus on its thermal and thermodynamic properties. Energy dispersive spectroscopy (EDS), X-ray diffraction (XRD), and scanning electron microscopy (SEM) were employed in the study of sample’s morphology and chemical composition. XRD data were further analyzed and lattice parameters refined by Rietveld analysis. Simultaneous thermal analysis was employed to study thermal stability. Particle size distribution was analyzed by laser diffraction. Finally, thermodynamic properties, namely heat capacity and relative enthalpy, were measured by drop calorimetry, differential scanning calorimetry (DSC), and physical properties measurement system (PPMS). Enthalpy of formation was assessed from ab-initio DFT calculations. Full article
(This article belongs to the Special Issue Synthesis and Properties of Nano-Based Composites)
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11 pages, 3323 KiB  
Article
Synthesis, Composition, and Properties of Partially Oxidized Graphite Oxides
by Michal Lojka, Boris Lochman, Ondřej Jankovský, Adéla Jiříčková, Zdeněk Sofer and David Sedmidubský
Materials 2019, 12(15), 2367; https://doi.org/10.3390/ma12152367 - 25 Jul 2019
Cited by 14 | Viewed by 2843
Abstract
The aim of this paper is to prepare and characterize partially-oxidized graphite oxide and consider if it is possible to affect the level of oxidation of particles by an adjustment of the oxidizing agent. Several samples were prepared, using different amounts of oxidizing [...] Read more.
The aim of this paper is to prepare and characterize partially-oxidized graphite oxide and consider if it is possible to affect the level of oxidation of particles by an adjustment of the oxidizing agent. Several samples were prepared, using different amounts of oxidizing agent. The samples were subsequently analyzed. The C/O ratio was evaluated from XPS, EDS, and EA. The amount and type of individual oxygen functionalities were characterized by XPS, Raman spectroscopy, and cyclic voltammetry. The structure was studied by SEM and XRD. Thermal stability was investigated by STA-MS in argon atmosphere. The results can be useful in order to design simple technology for graphite oxide synthesis with required oxygen content. Full article
(This article belongs to the Special Issue Synthesis and Properties of Nano-Based Composites)
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