Synthesis of Metal Oxide Aerogels and Its Application Progress in Coatings

A special issue of Coatings (ISSN 2079-6412). This special issue belongs to the section "Surface Engineering for Energy Harvesting, Conversion, and Storage".

Deadline for manuscript submissions: 20 March 2026 | Viewed by 563

Special Issue Editors


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National Institute for Research and Development in Electrochemistry and Condensed Matter Timisoara, Dr. A.P. Podeanu No.144, 300569 Timisoara, Romania
Interests: photocatalysis; nanomaterials synthesis; composite structures; physical chemistry characterization; aerogels; materials for electrodes
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Special Issue Information

Dear Colleagues,

In recent decades, aerogels have been studied and used as high-performance materials in various research fields, such as filtration, energy storage and conversion, photocatalysis, sound insulation, etc. Several studies have been carried out regarding aerogel preparation and their use as coatings or interfaces for different substrates. Among them, metal oxide aerogels are of particular interest due to their three-dimensional (3D) porous structure, high specific surface area, the large pore volume. These structural properties offer aerogels multiple advantages compared to 1D materials (powders or films); for example, in photocatalytic applications, more active catalytic sites are formed and they can be functionalized with other active catalysts. In addition, they can be regenerated more easily than powder-type photocatalysts (with 1D structure). Moreover, due to their low weight and production and regeneration costs, aerogels can be used in the aeronautical or aerospace industry. Due to the stability metallic oxide aerogels at high temperatures, they can be employed in the thermal protection of surfaces.

The aim of this Special Issue is to publish high-quality research papers that address recent advances in the synthesis and structural and mechanical properties of aerogels, as well the application of metal oxide aerogels.

In particular, the scope of this Special Issue includes, but is not limited to, the following topics:

  • Methods of synthesizing metal oxide aerogels;
  • Morpho-structural, mechanical and electrochemical properties of aerogels;
  • Techniques for the deposition coating of aerogels on different substrates;
  • Specific characteristics of metal oxide aerogels for application in filtration, energy storage and conversion, photocatalysis, sound insulation, and the aeronautical or aerospace industry.

Dr. Cornelia Bandas
Dr. Carmen Lǎzǎu
Guest Editors

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. Coatings is an international peer-reviewed open access monthly journal published by MDPI.

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Keywords

  • metal oxide
  • coatings
  • interfaces
  • tribology
  • adhesion
  • structural and mechanical properties
  • aerogels
  • corrosion
  • 3D structures

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Published Papers (1 paper)

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Review

30 pages, 9790 KiB  
Review
A Comprehensive Review on Aero-Materials: Present and Future Perspectives
by Corina Orha, Mircea Nicolaescu, Mina-Ionela Morariu (Popescu), Tatiana Galatonova, Simon Busuioc, Carmen Lazau and Cornelia Bandas
Coatings 2025, 15(7), 754; https://doi.org/10.3390/coatings15070754 - 25 Jun 2025
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Abstract
Recently, a new class of materials with very high porosity and ultra-lightweight, namely, semiconductor aero-materials, has attracted the attention of many researchers. Semiconductor aero-materials, due to their special properties, can be used in the development of devices applied in biomedical, electronics, optoelectronic, energy [...] Read more.
Recently, a new class of materials with very high porosity and ultra-lightweight, namely, semiconductor aero-materials, has attracted the attention of many researchers. Semiconductor aero-materials, due to their special properties, can be used in the development of devices applied in biomedical, electronics, optoelectronic, energy conversion and storage, sensors, biosensors, catalysis, automotive, and aeronautic industries. Although aero-materials and aerogels are similar, different methods of obtaining them are used. Aerogels are synthesized from organic, inorganic, or hybrid precursors, the main characteristic being that they are gel-like solids with a high air content (99.9%) in the structure. Thus, three-dimensional (3D) interconnected porous network chains are formed, resulting in light solid-state structures with very high porosity due to the large number of air pores in the network. On the other hand, to obtain aero-materials with controlled properties such as morphology, shape, or the formation of 3D hollow structures, sacrificial templates are used. Thus, sacrificial structures (which can be easily removed) can be obtained depending on the morphology of the 3D structure to be obtained. Therefore, this review paper offers a comprehensive coverage of the synthesis methods of different types of semiconductor aero-materials that use ZnO tetrapod, ZnO(T), as a sacrificial template, related to the present and future perspectives. These ZnO(T) sacrificial substrates offer several advantages, including diverse synthesis processes and easy removal methods that occur simultaneously with the growth of the desired aero-materials. Full article
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