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Applied Sciences
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Synthesis, Characterization and Applications of Metal Oxide Nanoparticles
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Synthesis, Characterization and Applications of Metal Oxide Nanoparticles

A special issue of Applied Sciences (ISSN 2076-3417). This special issue belongs to the section "Materials Science and Engineering".

Deadline for manuscript submissions: 10 September 2025 | Viewed by 3446

Special Issue Editors

Dr. Ivana Mitar

E-Mail Website
Guest Editor
Faculty of Science, University of Split, Ruđera Boškovića 33, 21000 Split, Croatia
Interests: metal
Dr. Anming Hu

E-Mail Website
Guest Editor
Department of Mechanical Aerospace and Biomedical Engineering, University of Tennessee, Knoxville, TN 37996, USA
Interests: nanomaterials; metals; smart materials; materials for environment and energy; light sensitive materials; biomass materials; materials for welding and joinning
Special Issues, Collections and Topics in MDPI journals
Dr. Ante Prkić

E-Mail Website
Guest Editor
Department for Analytical Chemistry, Faculty of Chemistry and Technology, University of Split, Ruđer Bošković 35, 21000 Split, Croatia
Interests: analytical chemistry; electrochemistry; atomic absorption; UV/Vis spectrophotometry; IR spectrophotometry
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

We are pleased to present our Special Issue dedicated to highlighting the latest advances in the development of metal oxide nanoparticles (nMO).

These nanoparticles exhibit exceptional properties resulting from their precise size, special shape, and unique surface characteristics, so they are of great importance for a variety of scientific and industrial fields such as nanotechnology, materials science, and engineering. For medical applications, these nanoparticles require biocompatibility and selective binding capabilities that can be achieved by modification or coating. Chemists and engineers use a range of chemical methods to synthesise metal oxide particles, focusing on simplicity, speed, and environmental compatibility. The incorporation of surfactants, polymers (natural or synthetic), and other additives into the synthesis routes of metal oxide nano/microstructures deserves special attention as they have a significant impact on the final properties. A shift away from conventional methods using environmentally harmful inorganic chemicals can be observed with the introduction of green synthesis—an alternative approach. In this process, plant-based substances are used to improve the surface properties of particles.

The methods used for the identification and comprehensive analysis of metal oxides, such as spectroscopy, diffractometry, magnetometry, and microscopy, play a central role in investigating the behaviour, structure, and intrinsic properties of metal oxides at different levels.

Our upcoming Special Issue, entitled "Synthesis, Characterization and Applications of Metal Oxide Nanoparticles", focuses on all of these important areas.

We look forward to receiving contributions that provide valuable insights into this dynamic field of research.

Yours sincerely,

Dr. Ivana Mitar
Dr. Anming Hu
Dr. Ante Prkić
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. Applied Sciences 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 2400 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
  • nanoparticles
  • synthesis
  • spectroscopy
  • diffractometry
  • magnetometry
  • microscopy
  • characterization techniques

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Published Papers (2 papers)

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Research

19 pages, 2979 KiB  
Article
Quantitative Analysis of Ferrate(VI) and Its Degradation Products in Electrochemically Produced Potassium Ferrate for Waste Water Treatment
by Zoltán Homonnay, Sándor Stichleutner, Ernő Kuzmann, Miklós Kuti, Győző G. Láng, Kende Attila Béres, László Trif, Dániel J. Nagy, Gyula Záray and József Lendvai
Appl. Sci. 2024, 14(19), 9144; https://doi.org/10.3390/app14199144 - 9 Oct 2024
Viewed by 924
Abstract
Potassium ferrate(VI) (K2FeO4) as a particularly strong oxidant represents an effective and environmentally friendly waste water treatment material. When produced by anodic oxidation in highly alkaline aqueous solution, the K2FeO4 product is separated and sealed in [...] Read more.
Potassium ferrate(VI) (K2FeO4) as a particularly strong oxidant represents an effective and environmentally friendly waste water treatment material. When produced by anodic oxidation in highly alkaline aqueous solution, the K2FeO4 product is separated and sealed in inert plastic bags with the retention of some liquid phase with high pH. This method proved to be excellent for long-term storage at moderately low temperature (5 °C) for industrial applications. It is still imperative to check the ferrate(VI) content of the product whenever it is to be used. Fe-57 Mössbauer spectroscopy is an excellent tool for checking the ratio of ferrate(VI) to the degradation product iron(III) in a sample. For this purpose, normally the spectral areas of the corresponding subspectra are considered; however, this approximation neglects the possible differences in the corresponding Mössbauer–Lamb factors. In this work, we have successfully determined the Mössbauer–Lamb factors for the ferrate(VI) and for the most common iron(III) degradation products observed. We have found superparamagnetic behavior and low-temperature phase transformation for another iron(III) degradation product that made the determination of the Mössbauer–Lamb factors impossible in that case. The identities of a total of three different iron(III) degradation products have been confirmed. Full article
(This article belongs to the Special Issue Synthesis, Characterization and Applications of Metal Oxide Nanoparticles)
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19 pages, 59613 KiB  
Article
Tailoring Zinc Oxide Nanoparticles via Microwave-Assisted Hydrothermal Synthesis for Enhanced Antibacterial Properties
by Irina Elena Doicin, Manuela Daniela Preda, Ionela Andreea Neacsu, Vladimir Lucian Ene, Alexandra Catalina Birca, Bogdan Stefan Vasile and Ecaterina Andronescu
Appl. Sci. 2024, 14(17), 7854; https://doi.org/10.3390/app14177854 - 4 Sep 2024
Viewed by 1838
Abstract
In recent years, significant advancements in nanotechnology have facilitated the synthesis of zinc oxide (ZnO) nanoparticles with tailored sizes and shapes, offering versatile applications across various fields, particularly in biomedicine. ZnO’s multifunctional properties, such as semiconductor behavior, luminescence, photocatalytic activity, and antibacterial efficacy, [...] Read more.
In recent years, significant advancements in nanotechnology have facilitated the synthesis of zinc oxide (ZnO) nanoparticles with tailored sizes and shapes, offering versatile applications across various fields, particularly in biomedicine. ZnO’s multifunctional properties, such as semiconductor behavior, luminescence, photocatalytic activity, and antibacterial efficacy, make it highly attractive for biomedical applications. This study focuses on synthesizing ZnO nanoparticles via the microwave-assisted hydrothermal method, varying the precursor concentrations (0.3488 mol/L, 0.1744 mol/L, 0.0872 mol/L, 0.0436 mol/L, and 0.0218 mol/L) and reaction times (15, 30, and 60 min). Characterization techniques, including X-ray diffraction, scanning electron microscopy, transmission electron microscopy, BET surface area analysis, and Fourier transform infrared spectroscopy were employed to assess the structural, morphological, and chemical properties. The predominant morphology is observed to be platelets, which exhibit a polygonal shape with beveled corners and occasionally include short rod-like inserts. The thickness of the platelets varies between 10 nm and 50 nm, increasing with the concentration of Zn2+ in the precursor solution. Preliminary antimicrobial studies indicated that all strains (S. aureus, E. coli, and C. albicans) were sensitive to interaction with ZnO, exhibiting inhibition zone diameters greater than 10 mm, particularly for samples with lower precursor concentrations. Cell viability studies on human osteoblast cells demonstrated good compatibility, affirming the potential biomedical applicability of synthesized ZnO nanoparticles. This research underscores the influence of synthesis parameters on the properties of ZnO nanoparticles, offering insights for optimizing their design for biomedical applications. Full article
(This article belongs to the Special Issue Synthesis, Characterization and Applications of Metal Oxide Nanoparticles)
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