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Oxide/Hydroxide-Based Materials and Their Application
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Oxide/Hydroxide-Based Materials and Their Application

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

Deadline for manuscript submissions: closed (10 October 2022) | Viewed by 2527

Special Issue Editor

Dr. Marilena Carbone

E-Mail Website
Guest Editor
Department of Chemical Sciences and Technologies, University of Rome Tor Vergata, Via della Ricerca Scientifica 1, 00133 Rome, Italy
Interests: nanoparticles with electrochemical and biomedical applications; tattoo inks: determination of the composition and removal; surface science: molecules on semiconductors for detection purposes
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Metal oxides and hydroxides display extremely versatile properties of conductivity, light absorption, fluorescence, chemiluminescence and permeability through microorganisms. which allow a large variety of applications. They can be used as superconductors, chemosensors, batteries, energy storage devices, biocides, carriers in cells and biomedical devices, dyes and pigments. The specific properties largely depend on the type of oxide or hydroxide, their peculiar structures and sizes. They can be arranged in nanoscopic and mesoscopic structures, nanoparticles, nanosheets, nanofoils, nanobelts, flower-like and grained-flower structures, foams, and needles. In addition, they can be used as pure, mixed or hybrid with organic materials, to create metal–organic frames or layered compounds.

This Special Issue is devoted to any aspect of metal oxides and hydroxides that highlights their properties, improves their existing applications or points towards new ones.

New types of syntheses or simpler, more environmentally friendly ones are the topic for this issue, in connection with their properties’ variations. Papers on new tools and devices based on metal oxides and hydroxides as well as new configurations of existing ones are welcome.

Prof. Marilena Carbone
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 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

  • metal oxides and hydroxides
  • mixed metal hydroxides/oxides
  • batteries
  • energy storage
  • superconductors
  • biocide
  • intracellular carriers
  • plants barriers piercing
  • band gaps
  • doping
  • morphology
  • X-ray diffraction

Published Papers (2 papers)

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Research

17 pages, 4131 KiB  
Article
CuO Nanoparticles and Microaggregates: An Experimental and Computational Study of Structure and Electronic Properties
by Lorenzo Gontrani, Elvira Maria Bauer, Alessandro Talone, Mauro Missori, Patrizia Imperatori, Pietro Tagliatesta and Marilena Carbone
Materials 2023, 16(13), 4800; https://doi.org/10.3390/ma16134800 - 03 Jul 2023
Cited by 3 | Viewed by 1173
Abstract
The link between morphology and properties is well-established in the nanoparticle literature. In this report, we show that different approaches in the synthesis of copper oxide can lead to nanoparticles (NPs) of different size and morphology. The structure and properties of the synthesized [...] Read more.
The link between morphology and properties is well-established in the nanoparticle literature. In this report, we show that different approaches in the synthesis of copper oxide can lead to nanoparticles (NPs) of different size and morphology. The structure and properties of the synthesized NPs are investigated with powder X-ray diffraction, scanning electron microscopy (SEM), and diffuse reflectance spectroscopy (DRS). Through detailed SEM analyses, we were able to correlate the synthetic pathways with the particles’ shape and aggregation, pointing out that bare hydrothermal pathways yield mainly spheroidal dandelion-like aggregates, whereas, if surfactants are added, the growth of the nanostructures along a preferential direction is promoted. The effect of the morphology on the electronic properties was evaluated through DRS, which allowed us to obtain the electron bandgap in every system synthesized, and to find that the rearrangement of threaded particles into more compact structures leads to a reduction in the energy difference. The latter result was compared with Density Functional Theory (DFT) computational models of small centrosymmetric CuO clusters, cut from the tenorite crystal structure. The computed UV-Vis absorption spectra obtained from the clusters are in good agreement with experimental findings. Full article
(This article belongs to the Special Issue Oxide/Hydroxide-Based Materials and Their Application)
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17 pages, 3696 KiB  
Article
Syntheses of APTMS-Coated ZnO: An Investigation towards Penconazole Detection
by Elvira Maria Bauer, Gabriele Bogliardi, Cosimo Ricci, Daniele Cecchetti, Tilde De Caro, Simona Sennato, Alessandro Nucara and Marilena Carbone
Materials 2022, 15(22), 8050; https://doi.org/10.3390/ma15228050 - 15 Nov 2022
Cited by 5 | Viewed by 1867
Abstract
Extrinsic chemiluminescence can be an efficient tool for determining pesticides and fungicides, which do not possess any intrinsic fluorescent signal. On this basis, (3-aminopropyl) trimethoxysilane (APTMS)-coated ZnO (APTMS@ZnO) was synthesized and tested as an extrinsic probe for the fungicide penconazole. Several synthetic routes [...] Read more.
Extrinsic chemiluminescence can be an efficient tool for determining pesticides and fungicides, which do not possess any intrinsic fluorescent signal. On this basis, (3-aminopropyl) trimethoxysilane (APTMS)-coated ZnO (APTMS@ZnO) was synthesized and tested as an extrinsic probe for the fungicide penconazole. Several synthetic routes were probed using either a one-pot or two-steps method, in order to ensure both a green synthetic pathway and a good signal variation for the penconazole concentration. The synthesized samples were characterized using X-ray diffraction (XRD), infrared (IR), Raman and ultraviolet-visible (UV-Vis) spectroscopy, scanning electron microscopy (SEM) imaging and associated energy-dispersive X-ray (EDX) analysis. The average size of the synthesized ZnO nanoparticles (NPs) is 54 ± 10 nm, in line with previous preparations. Of all the samples, those synthesized in two steps, at temperatures ranging from room temperature (RT) to a maximum of 40 °C, using water solvent (G-APTMG@ZnO), appeared to be composed of nanoparticles, homogeneously coated with APTMS. Chemiluminescence tests of G-APTMG@ZnO, in the penconazole concentration range 0.7–1.7 ppm resulted in a quenching of the native signal between 6% and 19% with a good linear response, thus indicating a green pathway for detecting the contaminant. The estimated detection limit (LOD) is 0.1 ± 0.01 ppm. Full article
(This article belongs to the Special Issue Oxide/Hydroxide-Based Materials and Their Application)
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