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Molecules
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Recent Progress in Nanocrystalline Oxides
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Recent Progress in Nanocrystalline Oxides

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

Deadline for manuscript submissions: closed (29 February 2024) | Viewed by 2046

Special Issue Editor

Dr. Alexander F. Bedilo

E-Mail Website
Guest Editor
Department of Materials Science and Functional Materials, Boreskov Institute of Catalysis SB RAS, 630090 Novosibirsk, Russia
Interests: nanocrystalline metal oxides; aerogels; catalysis; surface active sites; destruction of harmful substances

Special Issue Information

Dear Colleagues,

At present, nanocrystalline metal oxides find a great variety of applications in a wide range of interdisciplinary fields. It is well known that a host of properties depend on the particle size of metal oxides in the nanoscale range between 1 and 100 nm. A high specific surface area of nanocrystalline metal oxides often accounts for superior catalytic activity. Surface reactivity changes lead to variation in the selectivity of different products. When the crystal size becomes small, optical and electrical properties can be modified, coercive force in magnetic materials can be varied, melting points can decrease, mechanical properties can be modified, etc. In addition, nanocrystalline metal oxides can be used as supports for active metal species in catalysis, or as an integral part of composites with plastics or carbon materials.  Today, research on novel nanocrystalline metal oxide is multidisciplinary and involves chemistry for the development of new methods for their synthesis, physics for the study of their properties, biology as they can show antibacterial properties and engineering because they are already widely used in practical applications.

This Special Issue will focus on recent advances in research devoted to nanocrystalline metal oxides and composites based on them.  Its topics will cover various methods used for synthesis of such materials, their characterization by modern physical methods, theoretical studies related to the structure and properties of nanocrystalline metal oxides and composites, as well as their application in any area of technology, including catalysis and photocatalysis, adsorption, environmental remediation, energy storage and conversion, sensors, magnetic materials, optoelectronics, ceramics, textiles, biomedicine, and others.

Dr. Alexander F. Bedilo
Guest Editor

Manuscript Submission Information

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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

  • nanocrystals
  • metal oxides
  • catalysis
  • sensors
  • optoelectronics
  • magnetic materials
  • textiles
  • environmental remediation
  • ceramics
  • quantum chemistry
  • composites

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Published Papers (1 paper)

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Research

16 pages, 12287 KiB  
Article
Effect of Cd2+ Substitution on Structural–Magnetic and Dielectric Properties of Ni–Cu–Zn Spinel Ferrite Nanomaterials by Sol–Gel
by Hu Yang, Xingxing Yang, Jinpei Lin, Fang Yang, Yun He and Qing Lin
Molecules 2023, 28(16), 6110; https://doi.org/10.3390/molecules28166110 - 17 Aug 2023
Cited by 6 | Viewed by 1638
Abstract
CdxNi0.5−xCu0.2Zn0.3Fe2O4 (0 ≤ x ≤ 0.50) ferrite with a spinel structure was prepared using the sol–gel self-propagation method. The effects of Cd2+ doping on the structure, morphology, dielectric, and magnetic [...] Read more.
CdxNi0.5−xCu0.2Zn0.3Fe2O4 (0 ≤ x ≤ 0.50) ferrite with a spinel structure was prepared using the sol–gel self-propagation method. The effects of Cd2+ doping on the structure, morphology, dielectric, and magnetic properties of Ni–Cu–Zn ferrite were examined using XRD, SEM, EDX, FTIR, MPMS, and dielectric tests. The cubic spinel structure was verified by XRD and FTIR analyses. The crystallite size and particle size information of the samples were obtained with XRD and SEM analysis. The sample particle size belonged to a class of nanoscale materials with a particle size range of 1–100 nm. The minor difference between the grain size and particle size indicated that the sample nanoparticles were composed of numerous microcrystals. The EDX spectra indicated that the samples contained all stoichiometric elements. MPMS was used to measure the hysteresis lines of the samples. According to the hysteresis line, the saturation magnetization intensity (Ms), coercivity (Hc), and magnetic moment (μB) of the sample increased and then decreased with the increase in cadmium concentration. The magnetization strength (Ms) is between 4–67 emu/g, and the coercivity (Hc) is between 9–46 Oe. The curves of the real part of the dielectric constant (ε′), the imaginary part of the dielectric constant (ε″), and the loss factor (tanδ) with frequency were measured in the frequency range 100 Hz–100 kHz by means of an impedance analyzer. The complex modulus spectrum was analyzed to understand the dynamics of the conduction process. Full article
(This article belongs to the Special Issue Recent Progress in Nanocrystalline Oxides)
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