Synthesis, Physicochemical Characterization and Application of Nanostructured Metals and Metal Oxides

A special issue of Nanomaterials (ISSN 2079-4991). This special issue belongs to the section "Nanocomposite Materials".

Deadline for manuscript submissions: 20 April 2025 | Viewed by 1841

Special Issue Editors


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Guest Editor
Department of Chemical and Geological Sciences, University of Cagliari, 09124 Cagliari, Italy
Interests: nanomaterials; environmental chemistry; iron oxides and oxyhydroxides; metal and metalloid pollution; metal oxides; sorbents; sequential extraction; speciation and mobility studies; carbon capture and utilization; magnetism; archaeometry
Special Issues, Collections and Topics in MDPI journals

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Guest Editor
Dipartimento di Scienze Chimiche, Università di Cagliari, Cittadella Universitaria, 09042 Monserrato (Cagliari), Italy
Interests: X-ray; iron oxide nanoparticles; superparamagnetic behavior; coprecipitation method; COFE2O4 nanoparticles; MFE2O4 M; maghemite nanoparticles; cation distribution; particle size; MRI contrast

E-Mail Website
Guest Editor
Department of Chemical and Geological Sciences, University of Cagliari, 09124 Cagliari, Italy
Interests: nanomaterials; environmental chemistry; iron oxides and oxyhydroxides; metal and metalloid pollution; metal oxides; sorbents; sequential extraction; speciation and mobility studies; core–shell nanoparticles; solvothermal methods; transmission electron microscopy; EELS; EDX; heterostructures; magnetism

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Guest Editor Assistant
Department of Chemical and Geological Sciences, University of Cagliari, S.S. 554 Bivio per Sestu, 09042 Monserrato, Italy
Interests: nanomaterials; mesostructured materials; mesostructured silica; mesostructured aluminosilicates; mesostructured alumina; zeolites; Cu-based catalysts; Ni-based catalysts; bifunctional nanocomposite ca

Special Issue Information

Dear Colleagues,

Metal and metal oxide nanostructured materials are widely applied in different fields such as catalysis, biomedicine, molecule and gas sensing, environmental remediation, sorption, and energy harvesting. Their central role in technological progress arises from their unique physicochemical properties compared to their bulk counterparts, namely chemical, textural, electrical, optical, magnetic, and thermal properties. Moreover, efficient synthesis methods have been developed so far to tailor their composition, microstructure, shape, size, and texture and to combine different phases in nano-heterostructures to produce materials with controlled and ad hoc physicochemical properties.

Therefore, the Special Issue entitled “Synthesis, Physicochemical Characterization and Application of Nanostructured Metals and Metal Oxides”, hosted by Nanomaterials, is devoted to the collection of recent advances in the field of metal and metal oxide nanostructures, applied in different research fields through the publication of reviews, regular research papers, communications, and short notes. Different aspects might be treated in the proposed studies: from innovative synthesis methods to the fine tuning of the physicochemical properties, the study of the performances of the materials in a certain application, and the correlation between them. Due to the importance of the 2030 Sustainable Agenda and the attention the scientific community is paying to the related themes (reduction in greenhouse gasses, waste management, environmental pollution, renewable energy production, sustainable transport and production chains), studies dealing with materials designed for these issues and developed though greener methods compared to the traditional ones are welcome.

Dr. Valentina Mameli
Prof. Dr. Carla Cannas
Dr. Marco Sanna Angotzi
Guest Editors

Dr. Fausto Secci
Guest Editor Assistant

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Keywords

  • metal
  • metal oxide
  • nanoparticles
  • nanostructure
  • nanocomposite
  • nanomaterials
  • nanotechnology

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Published Papers (1 paper)

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Research

15 pages, 4199 KiB  
Article
Ordered versus Non-Ordered Mesoporous CeO2-Based Systems for the Direct Synthesis of Dimethyl Carbonate from CO2
by Nicoletta Rusta, Fausto Secci, Valentina Mameli and Carla Cannas
Nanomaterials 2024, 14(18), 1490; https://doi.org/10.3390/nano14181490 - 13 Sep 2024
Cited by 2 | Viewed by 1509
Abstract
In this work, non-ordered and ordered CeO2-based catalysts are proposed for CO2 conversion to dimethyl carbonate (DMC). Particularly, non-ordered mesoporous CeO2, consisting of small nanoparticles of about 8 nm, is compared with two highly porous (635–722 m2 [...] Read more.
In this work, non-ordered and ordered CeO2-based catalysts are proposed for CO2 conversion to dimethyl carbonate (DMC). Particularly, non-ordered mesoporous CeO2, consisting of small nanoparticles of about 8 nm, is compared with two highly porous (635–722 m2/g) ordered CeO2@SBA-15 nanocomposites obtained by two different impregnation strategies (a two-solvent impregnation method (TS) and a self-combustion (SC) method), with a final CeO2 loading of 10 wt%. Rietveld analyses on XRD data combined with TEM imaging evidence the influence of the impregnation strategy on the dispersion of the active phase as follows: nanoparticles of 8 nm for the TS composite vs. 3 nm for the SC composite. The catalytic results show comparable activities for the mesoporous ceria and the CeO2@SBA-15_SC nanocomposite, while a lower DMC yield is found for the CeO2@SBA-15_TS nanocomposite. This finding can presumably be ascribed to a partial obstruction of the pores by the CeO2 nanoparticles in the case of the TS composite, leading to a reduced accessibility of the active phase. On the other hand, in the case of the SC composite, where the CeO2 particle size is much lower than the pore size, there is an improved accessibility of the active phase to the molecules of the reactants. Full article
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