E-Mail Alert

Add your e-mail address to receive forthcoming issues of this journal:

Journal Browser

Journal Browser

Special Issue "Functional Mineral Materials: Sorption, Catalytic and Photofunctional Properties"

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

Deadline for manuscript submissions: 31 October 2019.

Special Issue Editor

Guest Editor
Prof. Dr. Tomasz Bajda

Faculty of Geology, Geophysics and Environmental Protection, AGH University of Science and Technology, 30-059 Krakow, al. A. Mickiewicza 30, Poland
Website | E-Mail
Interests: functionalized mineral materials, sorption, zeolites, clay minerals, organo-minerals, fly ashes, apatites

Special Issue Information

Dear Colleagues,

Functional minerals are the materials inspired by geological systems originating from the billion years long history of the Earth. Each of them has a unique chemical composition and a structure that determines its interesting properties and possible functions. Natural, synthetic, and anthropogenic minerals, both in the original and modified form, serve as useful agents in environmental and industrial applications. The functions of mineral materials include cation- and anion-exchange, sorption, immobilization, energy storage, catalysts, and photo-activity. Layered clay minerals, zeolites and zeolite-like structures, and layered double hydroxides (LDHs) are particularly suited to such a defined functionalization. The modification of minerals in order to obtain functional mineral materials includes surface modification, functional loading, intercalation, grafting, doping and structure reformation.

This Special Issue, collecting interdisciplinary studies, will provide the current top trends in the innovative functionalization techniques of mineral materials. Reports on the unique properties of functionalized materials and their expected applications are also welcome.

I believe that this collection will contribute to the development of functionalization techniques of mineral materials and will become a source of new ideas for the design, research and use of functionalized minerals.

Prof. Dr. Tomasz Bajda
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 papers will be 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 1800 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

  • mineral materials
  • functionalization
  • modification
  • sorption
  • catalysts
  • photoactivity
  • layered minerals
  • mesoporous materials
  • analytical methods

Published Papers (4 papers)

View options order results:
result details:
Displaying articles 1-4
Export citation of selected articles as:

Research

Open AccessArticle
Influence of Waste Engine Oil Addition on the Properties of Zeolite-Foamed Asphalt
Materials 2019, 12(14), 2265; https://doi.org/10.3390/ma12142265
Received: 6 June 2019 / Revised: 12 July 2019 / Accepted: 13 July 2019 / Published: 15 July 2019
Cited by 1 | PDF Full-text (3738 KB) | HTML Full-text | XML Full-text
Abstract
The previous studies on asphalt mix and asphalt with waste engine oil addition indicate the possibility of using this type of waste material for the construction of road pavements. The research presented in this paper aimed at the preliminary assessment of possible waste [...] Read more.
The previous studies on asphalt mix and asphalt with waste engine oil addition indicate the possibility of using this type of waste material for the construction of road pavements. The research presented in this paper aimed at the preliminary assessment of possible waste engine oil (WEO) addition to the asphalts foamed with water-soaked zeolites. In this research, synthetic zeolite Na-P1 and natural clinoptilolite were used. In order to improve the foaming effect, the zeolites were soaked with water before dispensing to the asphalt, in the amount of 75% asphalt weight for Na-P1 and 25% for clinoptilolite. The tests were performed for one type of waste engine oil—5W40 and two type of binders: 20/30 and polymer modified 25/55-60. The asphalt parameters such as the dynamic viscosity, penetration and softening point were determined with the addition of WEO and zeolites in the concentration of 0%, 3%, 5%, 7% for both materials. It was found that the WEO addition lowers the viscosity and softening point of asphalt but increases penetration. The zeolite addition affected the change of these parameters to a minor extent or was statistically irrelevant. The chemical analysis of the asphalt samples with WEO addition performed with the X-ray Fluorescence method did not show a significant amount of heavy metals which would increase the probability of low-temperature cracking. The analysis of the results indicates the possibility of using zeolite-foamed asphalt technology with WEO addition. Full article
Figures

Figure 1

Open AccessArticle
Sorption of Molybdates and Tungstates on Functionalized Montmorillonites: Structural and Textural Features
Materials 2019, 12(14), 2253; https://doi.org/10.3390/ma12142253
Received: 6 June 2019 / Revised: 5 July 2019 / Accepted: 10 July 2019 / Published: 13 July 2019
PDF Full-text (3978 KB) | HTML Full-text | XML Full-text
Abstract
Montmorillonite—the most popular mineral of the smectite group—has been recognized as a low-cost, easily available mineral sorbent of heavy metals and other organic and inorganic compounds that pollute water. The aim of this work was to determine the sorption mechanism and to identify [...] Read more.
Montmorillonite—the most popular mineral of the smectite group—has been recognized as a low-cost, easily available mineral sorbent of heavy metals and other organic and inorganic compounds that pollute water. The aim of this work was to determine the sorption mechanism and to identify the reaction products formed on the surface of montmorillonite and organo-montmorillonite after sorption of molybdates (Mo(VI)) and tungstates (W(VI)). Montmorillonites are often modified to generate a negative charge on the surface. The main objective of the study was to investigate and compare the features of Na-montmorillonite (Na-M), montmorillonite modified with dodecyl trimethyl ammonium bromide (DDTMA-M), and montmorillonite modified with didodecyl dimethyl ammonium bromide (DDDDMA-M) before and after sorption experiments. The material obtained after sorption was studied by X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), and X-ray photoelectron spectroscopy (XPS). The XRD pattern showed the presence of a new crystallic phase in the sample that was observed under an SEM as an accumulation of crystals. The FTIR spectra showed bands related to Mo–O and W–O vibration (840 and 940 cm−1, respectively). The obtained results suggest that molybdenum(VI) and tungsten(VI) ions sorb onto the organo-montmorillonite in the form of alkylammonium molybdates and tungstates. Full article
Figures

Figure 1

Open AccessArticle
The Nature of Interactions and UV-Induced Response within α-Zirconium Phosphate Intercalation Compounds with Azobenzenes
Materials 2019, 12(9), 1436; https://doi.org/10.3390/ma12091436
Received: 27 March 2019 / Revised: 27 April 2019 / Accepted: 30 April 2019 / Published: 2 May 2019
PDF Full-text (21251 KB) | HTML Full-text | XML Full-text | Supplementary Files
Abstract
Azobenzenes immobilization on a solid support enables the usage of their trans-cis isomerization ability for preparation of functional materials. The behavior of azobenzenes in the interlayer space of α-zirconium phosphate (ZrP) upon the UV–Vis irradiation was investigated. Two experimental approaches were performed: (1) [...] Read more.
Azobenzenes immobilization on a solid support enables the usage of their trans-cis isomerization ability for preparation of functional materials. The behavior of azobenzenes in the interlayer space of α-zirconium phosphate (ZrP) upon the UV–Vis irradiation was investigated. Two experimental approaches were performed: (1) co-intercalation of benzylalkylammonium surfactants and azobenzene in the interlayers of ZrP (ZBCnA), and (2) intercalation of p-aminoazobenzene (ZpA). The materials were characterized with XRD, FTIR, UV–Vis, CHN analysis, and the molecular modeling. The molecules in ZBCnA samples were sparsely packed and held by weak hydrophobic interactions. Conversely, the molecules in ZpA sample were strongly H-bonded to the ZrP, well-ordered, and densely packed. These structural features determined the samples’ photoresponsive behavior. Low density of molecules in the ZBCnA samples, allowed the effective, fast, and reversible isomerization of azobenzene. Whereas the ZpA sample did not react to the UV irradiation because of the steric hindrance of tightly packed molecules. Full article
Figures

Graphical abstract

Open AccessArticle
Removal of Chromates and Sulphates by Mg/Fe LDH and Heterostructured LDH/Halloysite Materials: Efficiency, Selectivity, and Stability of Adsorbents in Single- and Multi-Element Systems
Materials 2019, 12(9), 1373; https://doi.org/10.3390/ma12091373
Received: 23 March 2019 / Revised: 15 April 2019 / Accepted: 21 April 2019 / Published: 28 April 2019
Cited by 1 | PDF Full-text (9034 KB) | HTML Full-text | XML Full-text | Supplementary Files
Abstract
Industrial wastewaters often contain mobile and toxic anions that cannot be removed by precipitation techniques and most known adsorbents. Layered double hydroxides (LDH) are excellent scavengers of anions; however, their use in real applications is of minor importance owing to their swelling behavior [...] Read more.
Industrial wastewaters often contain mobile and toxic anions that cannot be removed by precipitation techniques and most known adsorbents. Layered double hydroxides (LDH) are excellent scavengers of anions; however, their use in real applications is of minor importance owing to their swelling behavior and high cost of production. The performed research shows the possibility of obtaining Mg/Fe LDH using natural magnesite. Moreover, heterostructured LDH/halloysite materials were synthesized. The adsorption efficiency of these materials was very high in both single- and multi-element systems, confirming the LDH selectivity. This was with the exception of wastewaters containing a high concentration of chlorides, which clearly hampered the removal of Cr(VI) and S(VI). The measurements indicated that LDH dissolution took place to a small extent (<10 wt%). The LDH/halloysite materials showed lower efficiency than the raw LDH; however, the clay presence has several benefits in terms of future applications: (i) it significantly reduces the pH, especially in contrast to the calcined LDH, which enables the reuse or safe disposal of purified water; (ii) it reduces swelling of the composite, which opens the possibility for applications in column adsorption; (iii) it induces dual adsorption properties through additional cation adsorption; and (iv) it substantially lowers the price of the adsorbent. Full article
Figures

Graphical abstract

Materials EISSN 1996-1944 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top