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Surface Chemistry of Hybrid Materials
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Surface Chemistry of Hybrid Materials

A special issue of Molecules (ISSN 1420-3049). This special issue belongs to the section "Inorganic Chemistry".

Deadline for manuscript submissions: closed (31 July 2022) | Viewed by 12246

Special Issue Editors

Dr. Inna V. Melnyk

E-Mail Website
Guest Editor
Institute of Geotechnics Slovak Academy of Sciences, 04001 Kosice, Slovakia
Interests: material characterization; hybrid materials; surface chemistry; sol–gel techniques; adsorption and adsorbents; wastewater treatment; tailored surface creation; nanocomposites
Special Issues, Collections and Topics in MDPI journals
Dr. Mariusz Barczak

E-Mail Website
Guest Editor
Associate Professor, Faculty of Chemistry, Maria Curie-Sklodowska University, 3/536, Maria Curie-Skłodowska Sq. 3, 20-031 Lublin, Poland
Interests: adsorption processes for environmental protection; porous hybrid materials; tailored surface modification; nanomaterials and nanocomposites; silica- and carbon-based functional materials
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Since the early 1990s, hybrid organic–inorganic materials began to attract significant attention from researchers due to their numerous advantages. Hybrid materials generally include organic and inorganic components linked together at the nanoscale. Because of the nature of interactions connecting both phases, such materials can be divided into two types: a) those with no covalent bond between inorganic and inorganic components; and b) those with covalent bonds between the components. New generations of hybrid materials and nanocomposites with tailorable surface properties are finding increasing applications in many areas, including environmental protection, sorption technologies, biomedicine, sensing, catalysis, chromatography, or multifunctional protective coatings. Proper surface chemistry design is of the utmost importance, as the surface chemistry determines the key properties associated with practical applications in the above-mentioned areas.

Considering the described, this Special Issue focuses on the latest trends and advances in the synthesis and surface tailoring of various hybrid materials and their nanocomposites for different applications. The aim of this Special Issue is to collect articles dealing with new concepts related to the synthesis, functionalization, characterization, and applications of various types of hybrid materials. Therefore, we are pleased to invite you to publish in this Special Issue of Molecules entitled “Surface Chemistry of Hybrid Materials” in the form of full articles, communications, or reviews.

Dr. Inna V. Melnyk
Dr. Mariusz Barczak
Guest Editors

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 submissions that pass pre-check are 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. Molecules 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 2700 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

  • hybrid materials
  • functional nanomaterials
  • polymer composites
  • supported metal oxides
  • carbon-based compounds
  • porous materials
  • surface chemistry
  • sol–gel method
  • xerogels, aerogels, and hydrogels

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Published Papers (4 papers)

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Research

20 pages, 8881 KiB  
Article
Diamine Groups on the Surface of Silica Particles as Complex-Forming Linkers for Metal Cations
by Veronika Tomina, Nataliya Stolyarchuk, Olha Semeshko, Mariusz Barczak and Inna Melnyk
Molecules 2023, 28(1), 430; https://doi.org/10.3390/molecules28010430 - 3 Jan 2023
Cited by 4 | Viewed by 2353
Abstract
Novel spherically shaped organosilica materials with (propyl)ethylenediamine groups were obtained via a modified one-pot Stöber co-condensation method. The porosity of these materials was tuned with the controlled addition of three silica monomers acting as structuring agents (tetraethoxysilane and bridged silanes with ethylene and [...] Read more.
Novel spherically shaped organosilica materials with (propyl)ethylenediamine groups were obtained via a modified one-pot Stöber co-condensation method. The porosity of these materials was tuned with the controlled addition of three silica monomers acting as structuring agents (tetraethoxysilane and bridged silanes with ethylene and phenylene bridges). The morphologies and structures of the synthesized materials were studied by SEM, DRIFT spectroscopy, CHNS elemental analysis, low-temperature nitrogen adsorption–desorption, and electrokinetic potential measurements. Their sizes were in the range of 50 to 100 nm, depending on the amount of structuring silane used in the reaction. The degree of the particles’ agglomeration determined the mesoporosity of the samples. The content of the (propyl)ethylenediamine groups was directly related with the amount of functional silane used in the reaction. The zeta potential measurements indicated the presence of silanol groups in bissilane-based samples, which added new active centers on the surface and reduced the activity of the amino groups. The static sorption capacities (SSCs) of the obtained samples towards Cu(II), Ni(II), and Eu(III) ions depended on the porosity of the samples and the spatial arrangement of the ethylenediamine groups; therefore, the SSC values were not always higher for the samples with the largest number of groups. The highest SSC values achieved were 1.8 mmolCu(II)/g (for ethylene-bridged samples), 0.83 mmolNi(II)/g (for phenylene-bridged samples), and 0.55 mmolEu(III)/g (for tetraethoxysilane-based samples). Full article
(This article belongs to the Special Issue Surface Chemistry of Hybrid Materials)
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20 pages, 5252 KiB  
Article
Synthesis of New Hybrid Structured Magnetite Crosslinked Poly Ionic Liquid for Efficient Removal of Coomassie Brilliant Blue R-250 Dye in Aqueous Medium
by Abdelrahman O. Ezzat, Ahmed M. Tawfeek, Jothi Ramalingam Rajabathar and Hamad A. Al-Lohedan
Molecules 2022, 27(2), 441; https://doi.org/10.3390/molecules27020441 - 10 Jan 2022
Cited by 11 | Viewed by 2585
Abstract
In this work, new crosslinked pyridinium poly ionic liquid and its magnetite hybrid structured composite were prepared and applied to remove the toxic dye Coomassie Brilliant Blue (CBB-R250) from aqueous solutions. In this respect, vinyl pyridine, maleic anhydride, and dibromo nonane were used [...] Read more.
In this work, new crosslinked pyridinium poly ionic liquid and its magnetite hybrid structured composite were prepared and applied to remove the toxic dye Coomassie Brilliant Blue (CBB-R250) from aqueous solutions. In this respect, vinyl pyridine, maleic anhydride, and dibromo nonane were used to prepare crosslinked quaternized vinyl pyridinium/maleic anhydride ionic liquid (CQVP-MA). Furthermore, a linear copolymer was prepared by the reaction of vinyl pyridine with bromo nonane followed by its copolymerization with maleic anhydride in order to use it as a capping agent for magnetite nanoparticles. The monodisperse MNPs were incorporated into the crosslinked PIL (CQVP-MA) by ultrasonication to prepare CQVP-MA/Fe3O4 composite to facilitate its recovery using an external magnetic field and enhance its adsorption capacity. The chemical structures, thermal stabilities, zeta potential, particle size, EDS, and SEM of the prepared CQVP-MA and CQVP-MA/Fe3O4 were investigated. Adsorption kinetics, isotherms, and mechanisms of CB-R250 elimination from aqueous solutions using CQVP-MA and CQVP-MA/Fe3O4 were also studied, and the results revealed that the pseudo second-order kinetic model and the Langmuir isotherm model were the most suitable to describe the CBB adsorption from an aqueous solution. The adsorption capacities of CQVP-MA and CQVP-MA/Fe3O4 were found to be 1040 and 1198, respectively, which are more than those for previously reported material in the literature with reasonable stability for five cycles. Full article
(This article belongs to the Special Issue Surface Chemistry of Hybrid Materials)
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18 pages, 15591 KiB  
Article
Surface Chemistry of Nanohybrids with Fumed Silica Functionalized by Polydimethylsiloxane/Dimethyl Carbonate Studied Using 1H, 13C, and 29Si Solid-State NMR Spectroscopy
by Iryna S. Protsak, Yevhenii M. Morozov, Dong Zhang and Volodymyr M. Gun’ko
Molecules 2021, 26(19), 5974; https://doi.org/10.3390/molecules26195974 - 1 Oct 2021
Cited by 5 | Viewed by 2987
Abstract
The investigation of molecular interactions between a silica surface and organic/inorganic polymers is crucial for deeper understanding of the dominant mechanisms of surface functionalization. In this work, attachment of various depolymerized polydimethylsiloxanes (PDMS) of different chain lengths, affected by dimethyl carbonate (DMC), to [...] Read more.
The investigation of molecular interactions between a silica surface and organic/inorganic polymers is crucial for deeper understanding of the dominant mechanisms of surface functionalization. In this work, attachment of various depolymerized polydimethylsiloxanes (PDMS) of different chain lengths, affected by dimethyl carbonate (DMC), to silica nanoparticles pretreated at different temperatures has been studied using 29Si, 1H, and 13C solid-state NMR spectroscopy. The results show that grafting of different modifier blends onto a preheated silica surface depends strongly on the specific surface area (SSA) linked to the silica nanoparticle size distributions affecting all textural characteristics. The pretreatment at 400 °C results in a greater degree of the modification of (i) A-150 (SSA = 150 m2/g) by PDMS-10/DMC and PDMS-1000/DMC blends; (ii) A-200 by PDMS-10/DMC and PDMS-100/DMC blends; and (iii) A-300 by PDMS-100/DMC and PDMS-1000/DMC blends. The spectral features observed using solid-state NMR spectroscopy suggest that the main surface products of the reactions of various depolymerized PDMS with pretreated nanosilica particles are the (CH3)3SiO-[(CH3)2SiO-]x fragments. The reactions occur with the siloxane bond breakage by DMC and replacing surface hydroxyls. Changes in the chemical shifts and line widths, as shown by solid-state NMR, provide novel information on the whole structure of functionalized nanosilica particles. This study highlights the major role of solid-state NMR spectroscopy for comprehensive characterization of functionalized solid surfaces. Full article
(This article belongs to the Special Issue Surface Chemistry of Hybrid Materials)
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21 pages, 4076 KiB  
Article
Valorization of Moroccan Bentonite Deposits: “Purification and Treatment of Margin by the Adsorption Process”
by Hanane Ait Hmeid, Mustapha Akodad, Mourad Baghour, Abdelmajid Moumen, Ali Skalli, Ghizlane Azizi, Hicham Gueddari, Mostapha Maach, Mimoun Aalaoul, Ahmed Anjjar and Lahcen Daoudi
Molecules 2021, 26(18), 5528; https://doi.org/10.3390/molecules26185528 - 12 Sep 2021
Cited by 15 | Viewed by 2928
Abstract
The main objective of this work was to contribute to the reduction in the contamination of phenolic compounds contained in margin by an adsorption process on two types of raw bentonite. The margin used in the studies was collected from a semi-modern oil [...] Read more.
The main objective of this work was to contribute to the reduction in the contamination of phenolic compounds contained in margin by an adsorption process on two types of raw bentonite. The margin used in the studies was collected from a semi-modern oil mill located in the Nador–Morocco region. The results of the physico-chemical analyses showed that the effluents of the oil mills showed that they are highly polluted, particularly in terms of the total suspended solids (TSS), chemical oxygen demand (COD), and iron content of around 154.82 (mg/L), and copper content of 31.72 (mg/L). The mineralogy of bentonites studied by X-ray diffraction (XRD) reveals the existence of two types of montmorillonite; theoretically, the diffraction peak (001) of the montmorillonite appears at 15 Å, with a basal spacing that corresponds to a calcium pole, and the diffraction peak (001) appears at 12Å, with a basal spacing that corresponds to a sodium pole. The specific surface area of the bentonite used is characterized by a large specific surface area, varying between 127.62 m2·g−1 and 693.04 m2·g−1, which is due to the presence of hydrated interleaved cations. This surface is likely to increase in aqueous solution depending on the solid/liquid ratio that modulates the degree of hydration. With a high cation exchange capacity (CEC) (146.54 meq/100 g), samples of margin mixed with raw bentonites at different percentages vary between 5% and 100%. The potential of Moroccan bentonite for the phenol adsorption of 9.17 (g/L) from aqueous solutions was investigated. Adsorption tests have confirmed the effectiveness of these natural minerals in reducing phenolic compounds ranging from 8.72% to 76.23% contained in the margin and the efficiency of heavy metal retention through microelements on raw bentonites. The very encouraging results obtained in this work could aid in the application of adsorption for the treatment of margin. Full article
(This article belongs to the Special Issue Surface Chemistry of Hybrid Materials)
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