Nanostructured Oxides: Advances in Synthesis, Characterization, and Applications

A special issue of Nanomaterials (ISSN 2079-4991). This special issue belongs to the section "Synthesis, Interfaces and Nanostructures".

Deadline for manuscript submissions: closed (20 November 2024) | Viewed by 1845

Special Issue Editor


E-Mail Website
Guest Editor
Department of Science and Engineering of Oxide Materials and Nanomaterials, Faculty of Chemical Engineering and Biotechnologies, National University of Science and Technology Politehnica Bucharest, 060042 Bucharest, Romania
Interests: nanoparticles; multiferroics; ferroelectrics
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Nanostructured oxides have emerged as a cutting-edge resource with profound implications for diverse scientific disciplines and technological applications. This Special Issue aims to explore the latest developments in the synthesis, characterization, and applications of nanostructured oxides. Nanostructured oxides exhibit unique properties and multifunctionalities due to their high surface area, tailored morphology, and tunable electronic structure. Researchers from various domains are invited to contribute to this Special Issue, shedding light on the current state of the art and future prospects in the field.

The expected submission topics are as follows:

  • Synthesis techniques: innovative methods for producing nanostructured oxides, including sol–gel, hydrothermal, and chemical vapor deposition, and atomic layer deposition;
  • Characterization methods: advanced analytical techniques like transmission electron microscopy, scanning electron microscopy, atomic force microscopy, X-ray diffraction, and spectroscopy for elucidating the structural and chemical properties of nanostructured oxides;
  • Functional nanomaterials: oxide nanomaterials with unique functionalities, such as ferroelectric, magnetic, catalytic, or superconducting properties;
  • Energy storage and conversion: the role of nanostructured oxides in batteries, capacitors, supercapacitors, fuel cells, and photovoltaics;
  • Catalysis: investigations into the catalytic performance of nanostructured oxides in various chemical reactions for sustainable processes;
  • Sensors and detectors: nanostructured oxide-based sensors and detectors for environmental monitoring, healthcare, and industrial applications;
  • Nanostructured oxides in electronics: the integration of nanostructured oxides into electronic devices, including transistors, memory devices, and sensors;
  • Environmental applications: the use of nanostructured oxides for water purification, air filtration, and remediation of hazardous pollutants;
  • Biomedical applications: nanostructured oxide materials for drug delivery, imaging, and therapeutics in the biomedical field;
  • Emerging trends: future directions in nanostructured oxide research, such as two-dimensional oxides, perovskites, and hybrid nanomaterials.

Dr. Vasile-Adrian Surdu
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. Nanomaterials 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 2900 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

  • nanostructured oxides
  • synthesis techniques
  • functional nanomaterials
  • energy storage
  • catalysis
  • sensors
  • electronics
  • environmental applications
  • biomedical applications
  • two-dimensional oxides
  • hybrid nanomaterials
  • photovoltaics
  • water purification

Benefits of Publishing in a Special Issue

  • Ease of navigation: Grouping papers by topic helps scholars navigate broad scope journals more efficiently.
  • Greater discoverability: Special Issues support the reach and impact of scientific research. Articles in Special Issues are more discoverable and cited more frequently.
  • Expansion of research network: Special Issues facilitate connections among authors, fostering scientific collaborations.
  • External promotion: Articles in Special Issues are often promoted through the journal's social media, increasing their visibility.
  • e-Book format: Special Issues with more than 10 articles can be published as dedicated e-books, ensuring wide and rapid dissemination.

Further information on MDPI's Special Issue polices can be found here.

Published Papers (2 papers)

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

Research

12 pages, 2681 KiB  
Article
Interpretable Structural Evaluation of Metal-Oxide Nanostructures in Scanning Transmission Electron Microscopy (STEM) Images via Persistent Homology
by Ryuto Eguchi, Yu Wen, Hideki Abe and Ayako Hashimoto
Nanomaterials 2024, 14(17), 1413; https://doi.org/10.3390/nano14171413 - 29 Aug 2024
Viewed by 870
Abstract
Persistent homology is a powerful tool for quantifying various structures, but it is equally crucial to maintain its interpretability. In this study, we extracted interpretable geometric features from the persistent diagrams (PDs) of scanning transmission electron microscopy (STEM) images of self-assembled Pt-CeO2 [...] Read more.
Persistent homology is a powerful tool for quantifying various structures, but it is equally crucial to maintain its interpretability. In this study, we extracted interpretable geometric features from the persistent diagrams (PDs) of scanning transmission electron microscopy (STEM) images of self-assembled Pt-CeO2 nanostructures synthesized under different annealing conditions. We focused on PD quadrants and extracted five interpretable features from the zeroth and first PDs of nanostructures ranging from maze-like to striped patterns. A combination of hierarchical clustering and inverse analysis of PDs reconstructed by principal component analysis through vectorization of the PDs highlighted the importance of the number of arc-like structures of the CeO2 phase in the first PDs, particularly those that were smaller than a characteristic size. This descriptor enabled us to quantify the degree of disorder, namely the density of bends, in nanostructures formed under different conditions. By using this descriptor along with the width of the CeO2 phase, we classified 12 Pt-CeO2 nanostructures in an interpretable way. Full article
Show Figures

Figure 1

15 pages, 6239 KiB  
Article
Effects of Cation Exchange in Rhodamine B Photocatalytic Degradation Using Peroxo-Titanate Nanotubes
by Do Hyung Han, Hyunsu Park, Tomoyo Goto, Sunghun Cho, Yeongjun Seo, Yoshifumi Kondo, Hisataka Nishida and Tohru Sekino
Nanomaterials 2024, 14(14), 1170; https://doi.org/10.3390/nano14141170 - 9 Jul 2024
Viewed by 657
Abstract
Lepidocrocite-type layered sodium titanate (NaxH2−xTi2O5) is widely used in environmental remediation because of its large specific surface area, formed by anisotropic crystal growth, and its ability to store and exchange cations between layers. Additionally, peroxo-titanate [...] Read more.
Lepidocrocite-type layered sodium titanate (NaxH2−xTi2O5) is widely used in environmental remediation because of its large specific surface area, formed by anisotropic crystal growth, and its ability to store and exchange cations between layers. Additionally, peroxo-titanate nanotubes (PTNTs), which are tubular titanates with peroxy groups, exhibit visible-light absorption capabilities, rendering them suitable for photocatalytic applications under visible light irradiation. However, because of cation exchange reactions, the Na+ concentration and pH of the solution can fluctuate under aqueous conditions, affecting the photocatalytic performance of the PTNTs. Herein, we evaluated the impact of cation exchange reactions on the photocatalytic degradation of Rhodamine B (Rh B) by PTNTs at controlled Na+ ratios. The observed pH of Rh B solutions increases due to the cation exchange reaction with Na+ and H3O+, leading to the formation of zwitter-ionic Rh B molecules, eventually weakening their adsorption and photodegradation performance. Moreover, the results indicate that inhibiting the pH increase of the Rh B solution can prevent the weakening of both the adsorption and photodegradation performance of PTNTs. This study highlights the significance of regulating the sodium ion content in layered titanate materials, emphasizing their importance in optimizing these materials’ photocatalytic efficacy for environmental purification applications. Full article
Show Figures

Figure 1

Back to TopTop