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Synthesis, Characterization and Application of Metal and Metal Oxide Nanomaterials
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Synthesis, Characterization and Application of Metal and Metal Oxide Nanomaterials

A special issue of International Journal of Molecular Sciences (ISSN 1422-0067). This special issue belongs to the section "Molecular Nanoscience".

Deadline for manuscript submissions: 20 August 2025 | Viewed by 2760

Special Issue Editors

Dr. Paolo Prosposito

E-Mail Website
Guest Editor
Industrial Engineering Department, University of Rome Tor Vergata, 00133 Rome, Italy
Interests: silver nanoparticles; silver nanoclusters; carbon dots; optical sensors; heavy metal ions detection; water filtering; optical coatings
Special Issues, Collections and Topics in MDPI journals
Dr. Luca Burratti

E-Mail Website
Guest Editor
Faculty of Technological Sciences and Innovation, Universitas Mercatorum, 00186 Rome, Italy
Interests: material science; hydrogels; water remediation; optical properties of materials; noble metal nanomaterials; 3D photo-printing; metal oxides
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

This Special Issue is dedicated to the synthesis, characterization, and application of metal and metal oxide nanostructures. Recently, the development of metal nanoparticles and nanoclusters capped with specific functionalization capabilities has enabled huge developments across many fields, such as sensing, bio-sensing, imaging, water filtering, and drug delivery, to name only a few. At the same time, the study and development of metal oxide nanomaterials and the possibility of fine-tuning their properties through innovative material synthesis or developing composites with better performances offer a great advantage, mainly, but not only, in the energy and environmental fields.

In this Special Issue, we will attempt to cover the most recent advances in this huge field. Experimental and theoretical scientific research, together with potential or real applications, are warmly welcome.

Dr. Paolo Prosposito
Dr. Luca Burratti
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. International Journal of Molecular Sciences is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. There is an Article Processing Charge (APC) for publication in this open access journal. For details about the APC please see here. 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 nanoparticles
  • metal nanoclusters
  • properties of metal nanostructures
  • optical sensing and bio-sensing
  • pollutant sensing
  • metal oxide-based materials
  • photocatalysis
  • decomposition of pollutants by photocatalysis
  • energy production, conversion, and storage
  • water treatment

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Published Papers (2 papers)

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17 pages, 12164 KiB  
Article
Study of Photodegradation of Bentazon Herbicide by Using ZnO-Sm2O3 Nanocomposite Under UV Light
by Sadaf Yasmeen, Luca Burratti, Leonardo Duranti, Antonio Agresti and Paolo Prosposito
Int. J. Mol. Sci. 2024, 25(24), 13319; https://doi.org/10.3390/ijms252413319 - 12 Dec 2024
Cited by 3 | Viewed by 919
Abstract
The removal of organic pollutants from water is significantly important as they have harmful effects on the ecosystem. Heterogeneous photocatalysis is a potential technique for the removal of organic pollutants from the wastewater. In this article, zinc oxide (ZnO) and samarium oxide (Sm [...] Read more.
The removal of organic pollutants from water is significantly important as they have harmful effects on the ecosystem. Heterogeneous photocatalysis is a potential technique for the removal of organic pollutants from the wastewater. In this article, zinc oxide (ZnO) and samarium oxide (Sm2O3) nanoparticles and ZnO-Sm2O3 nanocomposite (ZS) were synthesized by the co-precipitation method. We report the bandgap engineering of zinc oxide (ZnO) by making a composite with samarium oxide (Sm2O3) to enhance the photocatalytic activity. The smaller optical energy bandgap of the ZS nanocomposite as compared to the individual oxide nanoparticles shows that it has a light absorption range from UV to natural light. The photodegradation of bentazon herbicide as a model pollutant has been investigated by using the prepared samples. The photocatalytic activity of the prepared sample against bentazon herbicide was carried out under UV light for 140 min. The degradation efficiency against bentazon of the prepared samples was ZS > ZnO > Sm2O3, respectively. The ZnO-Sm2O3 nanocomposite showed a higher photocatalytic performance against bentazon and achieved a 90% degradation efficiency under a UV light source in 140 min. The pseudo-first-order degradation kinetic was studied under different operational conditions, such as catalyst loading, initial pH and bentazon concentration, showing that the degradation rate of bentazon was strongly influenced by these operational parameters. The obtained optimization conditions for practical application were a catalyst loading of 20 mg, pH of solution equal to 7 and bentazon concentration of 5 ppm for ZS nanocomposite in 60 mL of contaminated water. Furthermore, based on the scavenger study, hydroxyl and superoxide radicals play major role in the degradation experiment. The obtained results show that ZS nanocomposite can be a good potential candidate for wastewater treatment. Full article
(This article belongs to the Special Issue Synthesis, Characterization and Application of Metal and Metal Oxide Nanomaterials)
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12 pages, 10654 KiB  
Article
Gas-Sensing Performance of Metal Oxide Heterojunction Materials for SF6 Decomposition Gases: A DFT Study
by Tingting Zeng, Donglin Ma and Yingang Gui
Int. J. Mol. Sci. 2024, 25(15), 8009; https://doi.org/10.3390/ijms25158009 - 23 Jul 2024
Cited by 3 | Viewed by 1113
Abstract
The online monitoring of GIS equipment can be realized through detecting SF6 decomposition gasses. Metal oxide heterojunctions are widely used as gas-sensing materials. In this study, the structural and electrical properties of In2O3-ZnO and TiO2-ZnO heterojunctions [...] Read more.
The online monitoring of GIS equipment can be realized through detecting SF6 decomposition gasses. Metal oxide heterojunctions are widely used as gas-sensing materials. In this study, the structural and electrical properties of In2O3-ZnO and TiO2-ZnO heterojunctions were analyzed based on density functional theory calculations. After heterojunction structural optimization, the electrical conductivity of these two heterojunctions was enhanced compared to each intrinsic model, and the electrical conductivity is ranked as follows: In2O3-ZnO heterojunction > TiO2-ZnO heterojunction. The gas-sensing response of these two heterojunctions to four SF6 decomposition gasses, H2S, SO2, SOF2, and SO2F2, was investigated. For gas adsorption systems, the adsorption energy, charge transfer, density of states, charge difference density, and frontier molecular orbitals were calculated to analyze the adsorption and gas-sensing performance. For gas adsorption on the In2O3-ZnO heterojunction surface, the induced conductivity changes are in the following order: H2S > SO2F2 > SOF2 > SO2. For gas adsorption on the TiO2-ZnO heterojunction surface, H2S and SOF2 increase conductivity, and SO2 and SO2F2 decrease conductivity. Full article
(This article belongs to the Special Issue Synthesis, Characterization and Application of Metal and Metal Oxide Nanomaterials)
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