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Synthesis and Characterization of Hybrid Nanomaterials and Nanocomposites
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Synthesis and Characterization of Hybrid Nanomaterials and Nanocomposites

A special issue of Materials (ISSN 1996-1944). This special issue belongs to the section "Advanced Nanomaterials and Nanotechnology".

Deadline for manuscript submissions: closed (31 January 2021) | Viewed by 10337

Special Issue Editors

Dr. Mariusz Barczak

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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
Dr. Dimitrios Giannakoudakis

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Guest Editor
Department of Chemistry, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece
Interests: wastewater treatment; carbon nanotubes; nanotechnology; porous materials
Special Issues, Collections and Topics in MDPI journals
Dr. Maximilian O. Besenhard

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Guest Editor
Department of Chemical Engineering, University College London, London, UK
Interests: nanoparticle synthesis; nanomaterial characterization; iron oxide and noble metal nanoparticles; chemical and pharmaceutical engineering; crystallization; separation and purification; HPLC; flow chemistry; flow reactor engineering; process analytical technology; online characterization and process control; big- and multivariate data analysis; machine learning

Special Issue Information

Dear Colleagues,

New generations of hybrid nanomaterials and nanocomposites with enhanced performance and tailorable properties are finding increasing application in many areas, including environmental protection, biomedicine, sensing, catalysis, or multifunctional protective coatings. Apart from traditional synthetic processes, like the sol–gel method, there are nowadays a plethora of other more novel and advantageous bottom-up approaches that lead to the formation of hybrid nanomaterials. The precise characterization of their structural, morphological, and physicochemical features, as well as of their surface chemistry, is of paramount importance, since the properties to performance and cost correlation determine the possible practical applications in abovementioned areas. Organically modified silicates (ORMOSILS), metal–organic frameworks (MOF), or periodic mesoporous organosilicas (PMO) can be assumed among the most characteristic examples of hybrid nanomaterials of great scientific interest. The wide range of potential applications of hybrid nanomaterials in many well-established and emerging fields has intensified the research effort to achieve highly controlled synthesis in order to meet the required demands.

It is our pleasure to invite you to publish your work in this Special Issue of Materials entitled “Synthesis and Characterization of Hybrid Nanomaterials and Nanocomposites” in the form of full articles, communications, or reviews. The aim of this Special Issue is to gather articles describing new concepts related to the synthesis, functionalization, characterization, and application of different classes of hybrid nanomaterials.

Dr. Mariusz Barczak
Dr. Dimitrios Giannakoudakis
Dr. Maximilian O. Besenhard
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. 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 2600 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
  • nanomaterials
  • nanocomposites
  • sol–gel method
  • porous materials
  • functionalization
  • multifunctional hybrids
  • characterization techniques

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Published Papers (3 papers)

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Research

19 pages, 3789 KiB  
Article
Synthesis of PVA/CeO2 Based Nanocomposites with Tuned Refractive Index and Reduced Absorption Edge: Structural and Optical Studies
by Shujahadeen B. Aziz, Elham M. A. Dannoun, Dana A. Tahir, Sarkawt A. Hussen, Rebar T. Abdulwahid, Muaffaq M. Nofal, Ranjdar M. Abdullah, Ahang M. Hussein and Iver Brevik
Materials 2021, 14(6), 1570; https://doi.org/10.3390/ma14061570 - 23 Mar 2021
Cited by 56 | Viewed by 4047
Abstract
In the current study, polymer nanocomposites (NCPs) based on poly (vinyl alcohol) (PVA) with altered refractive index and absorption edge were synthesized by means of a solution cast technique. The characterization techniques of UV–Vis spectroscopy and XRD were used to inspect the structural [...] Read more.
In the current study, polymer nanocomposites (NCPs) based on poly (vinyl alcohol) (PVA) with altered refractive index and absorption edge were synthesized by means of a solution cast technique. The characterization techniques of UV–Vis spectroscopy and XRD were used to inspect the structural and optical properties of the prepared films. The XRD patterns of the doped samples have shown clear amendments in the structural properties of the PVA host polymer. Various optical parameters were studied to get more insights about the influence of CeO2 on optical properties of PVA. On the insertion of CeO2 nanoparticles (NPs) into the PVA matrix, the absorption edge was found to move to reduced photon energy sides. It was concluded that the CeO2 nanoparticles can be used to tune the refractive index (n) of the host polymer, and it reached up to 1.93 for 7 wt.% of CeO2 content. A detailed study of the bandgap (BG) was conducted using two approaches. The outcomes have confirmed the impact of the nanofiller on the BG reduction of the host polymer. The results of the optical BG study highlighted that it is crucial to address the ε” parameter during the BG analysis, and it is considered as a useful tool to specify the type of electronic transitions. Finally, the dispersion region of n is conferred in terms of the Wemple–DiDomenico single oscillator model. Full article
(This article belongs to the Special Issue Synthesis and Characterization of Hybrid Nanomaterials and Nanocomposites)
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20 pages, 2601 KiB  
Article
Effect of the Microstructure of the Semiconductor Support on the Photocatalytic Performance of the Pt-PtOx/TiO2 Catalyst System
by Katalin Majrik, Zoltán Pászti, László Korecz, Judith Mihály, Zoltán May, Péter Németh, Catia Cannilla, Giuseppe Bonura, Francesco Frusteri, András Tompos and Emília Tálas
Materials 2021, 14(4), 943; https://doi.org/10.3390/ma14040943 - 17 Feb 2021
Cited by 2 | Viewed by 2209
Abstract
The influence of the semiconductor microstructure on the photocatalytic behavior of Pt-PtOx/TiO2 catalysts was studied by comparing the methanol-reforming performance of systems based on commercial P25 or TiO2 from sol–gel synthesis calcined at different temperatures. The Pt co-catalyst was [...] Read more.
The influence of the semiconductor microstructure on the photocatalytic behavior of Pt-PtOx/TiO2 catalysts was studied by comparing the methanol-reforming performance of systems based on commercial P25 or TiO2 from sol–gel synthesis calcined at different temperatures. The Pt co-catalyst was deposited by incipient wetness and formed either by calcination or high-temperature H2 treatment. Structural features of the photocatalysts were established by X-ray powder diffraction (XRD), electron spin resonance (ESR), X-ray photoelectron spectroscopy (XPS), optical absorption, Raman spectroscopy and TEM measurements. In situ reduction of Pt during the photocatalytic reaction was generally observed. The P25-based samples showed the best H2 production, while the activity of all sol–gel-based samples was similar in spite of the varying microstructures resulting from the different preparation conditions. Accordingly, the sol–gel-based TiO2 has a fundamental structural feature interfering with its photocatalytic performance, which could not be improved by annealing in the 400–500 °C range even by scarifying specific surface area at higher temperatures. Full article
(This article belongs to the Special Issue Synthesis and Characterization of Hybrid Nanomaterials and Nanocomposites)
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16 pages, 5288 KiB  
Article
Preparation and Characterization of Novel Mixed Periodic Mesoporous Organosilica Nanoparticles
by Hao Li, Laurence Raehm, Clarence Charnay, Jean-Olivier Durand and Roser Pleixats
Materials 2020, 13(7), 1569; https://doi.org/10.3390/ma13071569 - 28 Mar 2020
Cited by 6 | Viewed by 3160
Abstract
We report herein the preparation of mixed periodic mesoporous organosilica nanoparticles (E-Pn 75/25 and 90/10 PMO NPs) by sol-gel co-condensation of E-1,2-bis(triethoxysilyl)ethylene ((E)-BTSE or E) with previously synthesized disilylated tert-butyl 3,5-dialkoxybenzoates bearing either sulfide (precursor P1 [...] Read more.
We report herein the preparation of mixed periodic mesoporous organosilica nanoparticles (E-Pn 75/25 and 90/10 PMO NPs) by sol-gel co-condensation of E-1,2-bis(triethoxysilyl)ethylene ((E)-BTSE or E) with previously synthesized disilylated tert-butyl 3,5-dialkoxybenzoates bearing either sulfide (precursor P1) or carbamate (precursor P2) functionalities in the linker. The syntheses were performed with cetyltrimethylammonium bromide (CTAB) as template in the presence of sodium hydroxide in water at 80 °C. The nanomaterials have been characterized by Transmission Electron Microscopy (TEM), nitrogen-sorption measurements (BET), Dynamic Light Scattering (DLS), zeta-potential, Thermogravimetric Analysis (TGA), FTIR, 13C CP MAS NMR and small angle X-ray diffraction (p-XRD). All the nanomaterials were obtained as mesoporous rodlike-shape nanoparticles. Remarkably, E-Pn 90/10 PMO NPs presented high specific surface areas ranging from 700 to 970 m2g−1, comparable or even higher than pure E PMO nanorods. Moreover, XRD analyses showed an organized porosity for E-P1 90/10 PMO NPs typical for a hexagonal 2D symmetry. The other materials showed a worm-like mesoporosity. Full article
(This article belongs to the Special Issue Synthesis and Characterization of Hybrid Nanomaterials and Nanocomposites)
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