Sol-Gel Synthesis of Nanomaterials

A special issue of Nanomaterials (ISSN 2079-4991). This special issue belongs to the section "Synthesis, Interfaces and Nanostructures".

Deadline for manuscript submissions: closed (31 December 2020) | Viewed by 8244

Special Issue Editors


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Guest Editor
Faculty of Chemistry, Adam Mickiewicz University, Umultowska 89b, 61-614 Poznań, Poland
Interests: composite nanomaterials; sol-gel synthesis; silica-based materials; materials science; surface modification; surface chemistry; surface structuring

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Guest Editor
Faculty of Chemistry, Adam Mickiewicz University, Umultowska 89b, 61-614 Poznań, Poland
Interests: synthesis and characterization of binary oxide system obtained using the sol-gel method; searching for a new ways to perform the sol-gel process (especially without adding water to the initial system); opening new possibilities in sol-gel chemistry; searching for the influence of gelling conditions on the surface morphology of the final gel; the use of FTIR in the assessment of changes in the acid-base character of the gel surface, with particular emphasis on probing molecules; the use of thermogravimetric methods to describe the processes occurring during sol-gel processes; textural research with particular emphasis on sintering processes; the use of sol-gel processes as one of the most promising methods for the preparation of organic-inorganic hybrids

Special Issue Information

Dear Colleagues,

Technology and modern science still require new nanomaterials with special properties. The sol-gel method is one of the well-established synthetic approaches for the preparation of nanomaterials. It is unbelievable, however the sol-gel process has been known since the mid-nineteenth century, when the first silica was made by M. Ebelmen in the "Manufacture de Ceramiques de Sevres" in France. The technique was rediscovered at the beginning of the 1970s, when the production of glass materials started, without melting at high temperatures. Over the past 30 years, the science of sol-gel has been developing rapidly, bringing significant economic benefits to raising the standard of living. Sol-gel technology can be considered as one of the most important technologies of the 21st century. The sol-gel method mainly undergoes the following few steps: hydrolysis, condensation/polymerization of monomers, and drying process. The sol-gel process has several advantages over other methods, for example, a low process temperature, flexibility of the forming material, controlled composition, allows for obtaining complex composition materials with a large surface area, and a high homogeneity of the final product.

The scope of the Special Issue is intended to cover all fields of science focused on the progress in the synthesis of sol-gel and the properties of nanomaterials. We invite research groups to present research results in the form of articles, reviews, communication, and letters.

Dr. Waldemar Nowicki
Prof. Piotr Kirszensztejn
Guest Editors

Manuscript Submission Information

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Keywords

  • sol-gel synthesis
  • non-aqueous sol-gel
  • nanomaterials
  • hybrid nanomaterials
  • amorphous materials
  • sol-gel composites nanoparticles
  • surface morphology
  • catalysts
  • adsorbents
  • supports

Published Papers (2 papers)

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Research

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28 pages, 43368 KiB  
Article
Hydrothermal SiO2 Nanopowders: Obtaining Them and Their Characteristics
by Vadim Potapov, Roman Fediuk and Denis Gorev
Nanomaterials 2020, 10(4), 624; https://doi.org/10.3390/nano10040624 - 27 Mar 2020
Cited by 12 | Viewed by 2921
Abstract
The technological mode of obtaining amorphous SiO2 nanopowders based on hydrothermal solutions is proposed in this study. Polycondensation of orthosilicic acid as well as ultrafiltration membrane separation, and cryochemical vacuum sublimation were used. The characteristics of nanopowders were determined by tunneling electron [...] Read more.
The technological mode of obtaining amorphous SiO2 nanopowders based on hydrothermal solutions is proposed in this study. Polycondensation of orthosilicic acid as well as ultrafiltration membrane separation, and cryochemical vacuum sublimation were used. The characteristics of nanopowders were determined by tunneling electron microscopy, low-temperature nitrogen adsorption, X-ray diffraction, and small-angle X-ray scattering. The scheme allows to adjust density, particle diameters of nanopowders, specific surface area, as well as diameters, area and volume of the pore. Thus, the structure of nanopowders is regulated—the volume fraction of the packing of spherical particles in aggregates and agglomerates, the size of agglomerates, and the number of particles in agglomerates. The pour densities of the nanopowders depend on the SiO2 content in sols, which were 0.02 to 0.3 g/cm3. Nanoparticles specific surface area was brought to 500 m2/g by low temperature polycondensation. Nanoparticle aggregates specific pore volume (0.2–0.3 g/cm3) weakly depend on powders density. The volume fraction of the packing of SiO2 nanoparticles in aggregates was 0.6–0.7. Solid samples of compacted nanopowders had a compressive strength of up to 337 MPa. Possible applications of hydrothermal SiO2 nanopowders are considered. Full article
(This article belongs to the Special Issue Sol-Gel Synthesis of Nanomaterials)
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Review

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30 pages, 12882 KiB  
Review
Nanomaterial Fabrication through the Modification of Sol–Gel Derived Coatings
by Wai Kian Tan, Hiroyuki Muto, Go Kawamura, Zainovia Lockman and Atsunori Matsuda
Nanomaterials 2021, 11(1), 181; https://doi.org/10.3390/nano11010181 - 13 Jan 2021
Cited by 39 | Viewed by 4213
Abstract
In materials processing, the sol–gel method is one of the techniques that has enabled large-scale production at low cost in the past few decades. The versatility of the method has been proven as the fabrication of various materials ranging from metallic, inorganic, organic, [...] Read more.
In materials processing, the sol–gel method is one of the techniques that has enabled large-scale production at low cost in the past few decades. The versatility of the method has been proven as the fabrication of various materials ranging from metallic, inorganic, organic, and hybrid has been reported. In this review, a brief introduction of the sol–gel technique is provided and followed by a discussion of the significance of this method for materials processing and development leading to the creation of novel materials through sol–gel derived coatings. The controlled modification of sol–gel derived coatings and their respective applications are also described. Finally, current development and the outlook of the sol–gel method for the design and fabrication of nanomaterials in various fields are described. The emphasis is on the significant potential of the sol–gel method for the development of new, emerging technologies. Full article
(This article belongs to the Special Issue Sol-Gel Synthesis of Nanomaterials)
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