Special Issue "Sol-Gel Synthesis of Materials"

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

Deadline for manuscript submissions: 31 March 2021.

Special Issue Editor

Prof. Dr. Aivaras Kareiva
Website
Guest Editor
Institute of Chemistry, Vilnius University, Vilnius, Naugarduko Street 24, LT-03225 Vilnius, Lithuania
Interests: sol-gel synthesis; multifunctional metal oxides; optical materials; bioceramic materials; nanomaterials; conservation chemistry
Special Issues and Collections in MDPI journals

Special Issue Information

Dear Colleagues,

Over the last few decades, the sol-gel techniques have been used to prepare a variety of mixed-metal oxides, nanomaterials and nanoscale architectures, nanoporous oxides, organic-inorganic hybrids. These materials now represent one of the largest manufacturing sectors in the world. One challenge for the high end of the market is the development of alternative synthesis technologies that are not just “greener” but provide environmentally benign processes. It is well known also that physical properties of crystalline materials are strongly dependent on the phase purity, grain size and grain size distribution. Therefore, it is also very important to develop simple, reliable and cost-effective synthesis method for the preparation of products with controllable phase purity and surface morphology. Among different synthesis methods, sol–gel processing route is most convenient method because of its simplicity, good mixing of starting materials, relatively low reaction temperature and easy control of chemical composition of the end product. Sol-gel synthesis is utilized to fabricate advanced materials in a wide variety of forms: ultrafine powders, thin film coatings, fibbers, porous or dense materials. The scope of this Special Issue of Materials is focused on the development of sol-gel synthesis technique, and application of sol-gel processing for the fabrication of multifunctional materials, which are important in all industrial areas. The field of the research in the evolution of inorganic networks through the formation of a colloidal suspension (sol) and gelation of the sol to form three-dimensional, continuous network in a liquid phase (gel) is very much appreciated.

Prof. Aivaras Kareiva
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 2000 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

  • sol-gel synthesis
  • aqueous processing
  • metal alkoxides route
  • mixed-metal oxides
  • nanomaterials
  • organic-inorganic hybrids
  • functional materials
  • ultrafine powders
  • thin/thick films
  • fibbers
  • porous and dense materials

Published Papers (4 papers)

Order results
Result details
Select all
Export citation of selected articles as:

Research

Open AccessArticle
Optimization of Hybrid Sol-Gel Coating for Dropwise Condensation of Pure Steam
Materials 2020, 13(4), 878; https://doi.org/10.3390/ma13040878 - 15 Feb 2020
Abstract
We developed hybrid organic–inorganic sol–gel silica coatings with good durability in harsh environment (high temperatures, high vapor velocities) and with slightly hydrophobic behavior, sufficient to promote dropwise condensation (DWC) of pure steam. DWC is a very promising mechanism in new trends of thermal [...] Read more.
We developed hybrid organic–inorganic sol–gel silica coatings with good durability in harsh environment (high temperatures, high vapor velocities) and with slightly hydrophobic behavior, sufficient to promote dropwise condensation (DWC) of pure steam. DWC is a very promising mechanism in new trends of thermal management and power generation systems to enhance the heat transfer during condensation as compared to film-wise condensation (FWC). The sol–gel coatings have been prepared from methyl triethoxy silane (MTES) and tetraethyl-orthosilicate (TEOS) and deposited on an aluminum substrate. The coatings were optimized in terms of precursor ratio and annealing temperature highlighting potentials and limits of such mixtures. A comprehensive surface characterization before and after saturated steam condensation tests has been performed and related to the thermal measurements for evaluating the heat transfer augmentation as compared to FWC obtained on untreated aluminum surfaces. The results showed that the developed hybrid organic-inorganic sol–gel silica coatings are promising DWC promoters. Full article
(This article belongs to the Special Issue Sol-Gel Synthesis of Materials)
Show Figures

Figure 1

Open AccessArticle
The Effect of Chitosan’s Addition to Resorcinol/Formaldehyde Xerogels on the Characteristics of Resultant Activated Carbon
Materials 2019, 12(23), 3847; https://doi.org/10.3390/ma12233847 - 22 Nov 2019
Abstract
Hybrid chitosan-resorcinol/formaldehyde xerogels were synthesized, and the effect of including minor quantities of chitosan on the consequent activated carbon was investigated. The resulting activated carbon were characterized by different techniques. Clear changes were found in the structure of activated carbon as a result [...] Read more.
Hybrid chitosan-resorcinol/formaldehyde xerogels were synthesized, and the effect of including minor quantities of chitosan on the consequent activated carbon was investigated. The resulting activated carbon were characterized by different techniques. Clear changes were found in the structure of activated carbon as a result of including chitosan in the synthesis. The results showed that the disorder ratio of crystal lattice decreased from 0.750 to 0.628 when increasing the concentration of chitosan from 0 to 0.037 wt%. The micropores increased from ~0.3% to ~1.0%, mesopores increased from ~11.2% to ~32.9% and macropores decreased from ~88.4% to ~66.1%. The total pore volume decreased from 1.040 to 0.238 cm3/g and the total pore surface area decreased from 912.3 to 554.4 m2/g. On the other hand, the average pore width decreased from 2.3 to 0.8 nm and the average particle size decreased from 224 to 149 nm. Nano-scale Scanning Electron Microscope (NanoSEM) morphology indicated a critical composition of chitosan (0.022 wt%) that affects the structure and thermal stability of activated carbon produced. Full article
(This article belongs to the Special Issue Sol-Gel Synthesis of Materials)
Show Figures

Graphical abstract

Open AccessArticle
Undoped and Eu3+ Doped Magnesium-Aluminium Layered Double Hydroxides: Peculiarities of Intercalation of Organic Anions and Investigation of Luminescence Properties
Materials 2019, 12(5), 736; https://doi.org/10.3390/ma12050736 - 04 Mar 2019
Cited by 3
Abstract
The Mg3/Al and Mg3/Al0.99Eu0.01 layered double hydroxides (LDHs) were fabricated using a sol-gel chemistry approach and intercalated with different anions through ion exchange procedure. The influence of the origin of organic anion (oxalate, laurate, malonate, succinate, [...] Read more.
The Mg3/Al and Mg3/Al0.99Eu0.01 layered double hydroxides (LDHs) were fabricated using a sol-gel chemistry approach and intercalated with different anions through ion exchange procedure. The influence of the origin of organic anion (oxalate, laurate, malonate, succinate, tartrate, benzoate, 1,3,5-benzentricarboxylate (BTC), 4-methylbenzoate (MB), 4-dimethylaminobenzoate (DMB) and 4-biphenylacetonate (BPhAc)) on the evolution of the chemical composition of the inorganic-organic LDHs system has been investigated. The obtained results indicated that the type and arrangement of organic guests between layers of the LDHs influence Eu3+ luminescence in the synthesized different hybrid inorganic–organic matrixes. For the characterization of synthesis products X-ray diffraction (XRD) analysis, infrared (FTIR) spectroscopy, fluorescence spectroscopy (FLS), and scanning electron microscopy (SEM), were used. Full article
(This article belongs to the Special Issue Sol-Gel Synthesis of Materials)
Show Figures

Figure 1

Open AccessArticle
Synthesis and Characterization of TiO2-ZnO-MgO Mixed Oxide and Their Antibacterial Activity
Materials 2019, 12(5), 698; https://doi.org/10.3390/ma12050698 - 27 Feb 2019
Cited by 7
Abstract
TiO2-ZnO-MgO mixed oxide nanomaterials (MONs) were synthetized via the sol-gel method and characterized by scanning electron microscopy (SEM) coupled with energy dispersive spectroscopy (EDS), transmission electron microscopy (TEM), nitrogen physisorption analysis, X-ray diffraction (XRD), UV-Vis diffuse reflectance spectroscopy (UV-Vis DRS), Fourier [...] Read more.
TiO2-ZnO-MgO mixed oxide nanomaterials (MONs) were synthetized via the sol-gel method and characterized by scanning electron microscopy (SEM) coupled with energy dispersive spectroscopy (EDS), transmission electron microscopy (TEM), nitrogen physisorption analysis, X-ray diffraction (XRD), UV-Vis diffuse reflectance spectroscopy (UV-Vis DRS), Fourier transform infrared spectroscopy (FTIR), and color (Luminosity (L), a, b, Chrome, hue) parameters. Furthermore, the antimicrobial activity of the MONs was tested against Escherichia coli (EC), Salmonella paratyphi (SP), Staphylococcus aureus (SA), and Listeria monocytogenes (LM). The MONs presented a semi globular-ovoid shape of ≤100 nm. Samples were classified as mesoporous materials and preserved in the TiO2 anatase phase, with slight changes in the color parameters of the MONs in comparison with pure TiO2. The MONs exhibited antimicrobial activity, and their effect on the tested bacteria was in the following order: EC > SP > SA > LM. Therefore, MONs could be used as antimicrobial agents for industrial applications. Full article
(This article belongs to the Special Issue Sol-Gel Synthesis of Materials)
Show Figures

Graphical abstract

Planned Papers

The below list represents only planned manuscripts. Some of these manuscripts have not been received by the Editorial Office yet. Papers submitted to MDPI journals are subject to peer-review.

Title: Conversion of one-dimensional Ni/NiO core-shell nanowires to NiO nanotubes
Authors: Zibin Dong, Yi Luo, Weifeng Zhang, Haizhong Guo and Wenfeng Xiang
Abstract: Conversion of one-dimensional Ni/NiO nanowires to polycrystalline NiO nanotubes has been performed by a heat-treatment method. The microstructure and surface composition of the Ni/NiO nanowires and NiO nanotubes during the conversion were investigated employing a combination of x-ray diffraction, Raman spectra, scanning electron microscopy, transmission electron microscopy, photoemission spectroscopy, and x-ray photoemission. The results show that the Ni nanowires convert to Ni/NiO core-shell nanowires with increasing the annealing temperature and then completely convert to NiO nanotubes over 600 °C. The NiO grain size and NiO/Ni ratio increase, and the surface roughness of the Ni/NiO nanowires gradually decreases with the annealing temperature. Our findings demonstrate that the conversional evolution of the Ni-based nanostructures may provide useful information for the preparation of the one-dimensional Ni-based nanostructures with different microstructure and properties to meet their various applications.

Title: Effect of Chitosan Addition to Resorcinol/Formaldehyde Xerogels on the Characteristics of Consequent Activated Carbons
Authors: Shaheen Abdulhafez Al-Muhtaseb

 

 

Back to TopTop