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Natural Minerals as Smart Materials for Advanced Technologies

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

Deadline for manuscript submissions: closed (20 June 2022) | Viewed by 5986

Special Issue Editor


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Guest Editor
Department of Environmental Chemistry and Bioanalytics, Faculty of Chemistry, Nicolaus Copernicus University in Torun, 87-100 Torun, Poland
Interests: natural adsorbents; material characterization; adsorption processes; biogenic minerals; nanomaterials

Special Issue Information

Dear Colleagues,

Recently, materials with the ability to reversibly change some of their functional or structural properties in response to various kinds of deliberately imposed external stimulus (mechanical, chemical, physical) have been classified into the group of so-called smart materials. Natural minerals with unique physicochemical properties can also be reasonably be included in the category of smart materials as a separate group of smart natural minerals. Many naturally occurring minerals are characterized by phenomenal properties, including: optical (opal, ulexite); piezoelectric (quartz, berlinite); electric (perovskite, covellite); magnetic (garnets, magnetoplumbite); multiferroic (boracite); and ferroelectric/ferroelastic (rippite). They can also have unique micro- and nanostructures, including tubular (chrysotile, imogolite); hollow spherules (allophone); cluster structures (menezesite); layered double structures (takovite); frameworks (zorite); metal-organic frameworks (stepanovite); and self-replicated structures (montmorillonite). The natural minerals arouse great interest due to the possibility of using their active functional structures in many advanced technological solutions and new-generation devices.

This Special Issue is intended for professionals in different fields of science with a special interest in the investigation of new fascinating phenomena occurring in mineral structures at the micro- and nano-scale, and will cover a wide range of smart natural minerals with unique physicochemical properties.

The idea of this issue was also to integrate knowledge from various scientific fields regarding the unique properties of natural minerals. This may result in the emergence of new ideas, inspiration in the development of new methods for the synthesis of new advanced materials.

Prof. Dr. Myroslav Sprynskyy
Guest Editor

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Keywords

  • smart natural minerals
  • nanotube, nanosphere, and nanocluster mineral nanostructures
  • piezoelectric, magnetic, and ferroelectric minerals
  • photonic crystals
  • biogenic minerals
  • structural phase transitions
  • mineral surface reactivity
  • structure–properties relationships

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Published Papers (2 papers)

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Research

24 pages, 4311 KiB  
Article
X-ray Photoelectron Spectroscopic Study of Some Organic and Inorganic Modified Clay Minerals
by J. Theo Kloprogge, Concepcion P. Ponce and Danilo O. Ortillo
Materials 2021, 14(23), 7115; https://doi.org/10.3390/ma14237115 - 23 Nov 2021
Cited by 17 | Viewed by 2598
Abstract
Layered clay systems intercalated with inorganic and organic compounds were analyzed to highlight how XPS can provide information on the different environments surrounding a particular atom as well as provide discernments on the size, coordination, and structural and oxidative transformations of the intercalating/pillaring [...] Read more.
Layered clay systems intercalated with inorganic and organic compounds were analyzed to highlight how XPS can provide information on the different environments surrounding a particular atom as well as provide discernments on the size, coordination, and structural and oxidative transformations of the intercalating/pillaring compounds. XPS data on the intercalation of urea and K-acetate in low- and high-defect kaolinite revealed the interaction of the intercalating group NH2 with the siloxane functional groups in the interlayer surface. The intercalation of HDTMA in Mt demonstrated the use of XPS in monitoring the change in conformation assumed by alkylammonium intercalating compounds in Mt with increasing CEC. Studies on the pillaring of Mt by Al13 and Ga13 by XPS allowed determination of the coordination of the pillaring compound within the Mt layer. Lastly, the intercalation of hexacyanoferrate in hydrotalcite demonstrated the capability of XPS in following changes in the oxidation state of the iron compound. These were gleaned from interpretation of the shifts in binding energies and presence of multiplet splitting in the XPS of the component elements of the minerals or the intercalating compounds. Full article
(This article belongs to the Special Issue Natural Minerals as Smart Materials for Advanced Technologies)
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14 pages, 5746 KiB  
Article
Silicate Mineral Eutectics with Special Reference to Lithium
by Agata Stempkowska
Materials 2021, 14(15), 4334; https://doi.org/10.3390/ma14154334 - 3 Aug 2021
Cited by 4 | Viewed by 2562
Abstract
In this paper, the system of natural mineral alkali fluxes used in typical mineral industry technologies was analyzed. The main objective was to reduce the melting temperature of the flux systems. Particular attention was paid to the properties of lithium aluminium silicates in [...] Read more.
In this paper, the system of natural mineral alkali fluxes used in typical mineral industry technologies was analyzed. The main objective was to reduce the melting temperature of the flux systems. Particular attention was paid to the properties of lithium aluminium silicates in terms of simplifying and accelerating the heat treatment process. In this area, an alkaline flux system involving lithium was analyzed. A basic flux system based on sodium potassium lithium aluminosilicates was analyzed; using naturally occurring raw materials such as spodumene, albite and orthoclase, an attempt was made to obtain the eutectic with the lowest melting point. Studies have shown that there are two eutectics in these systems, with about 30% spodumene content. The active influence of sodium feldspar was found. Full article
(This article belongs to the Special Issue Natural Minerals as Smart Materials for Advanced Technologies)
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