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Materials
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Low-Dimensional Nanomaterials: Synthesis, Classification, and Application
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Low-Dimensional Nanomaterials: Synthesis, Classification, and Application

A special issue of Materials (ISSN 1996-1944). This special issue belongs to the section "Advanced Nanomaterials and Nanotechnology".

Deadline for manuscript submissions: closed (20 June 2022) | Viewed by 3018

Special Issue Editors

Dr. Rita Sánchez Tovar

E-Mail Website
Guest Editor
Departament d’Enginyeria Química, Universitat de València, Av. de les Universitats, s/n, 46100 Burjassot, Spain
Interests: photoelectrocatalysis; electrochemistry; catalysis; nanomaterials; metal oxide semiconductors; environmental; energy
Dr. Ramón Manuel Fernández Domene

E-Mail Website
Guest Editor
Chemical Engineering Department (ETSE), Universitat de València, Av. Universitat s/n, 46100 Burjassot-Valencia, Spain
Interests: photoelectrocatalysis; electrochemistry; catalysis; nanomaterials; metal oxide semiconductors; environmental; energy
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

This Special Issue, entitled “Low-Dimensional Nanomaterials: Synthesis, Classification, and Application”, is focused on the synthesis and characterization of nanomaterials with different morphologies (e.g., metal oxide semiconductors). Special emphasis will be given to their applications as catalysts for energy and environmental fields, such as photoelectrochemical water splitting, CO2 conversion, oxidation of organic pollutants, anodes for batteries, membrane ceramic materials, sensors, and so on. Contributions should include innovative synthesis strategies to produce the nanomaterials, which could be heterostructures of different oxides to ensure low cost and/or to enhance their catalytic response (electrochemical anodization, hydrothermal methods, sol–gel synthesis, etc.).

We are pleased to invite you to submit a manuscript for this Special Issue. Both original research contributions (full papers and communications) and reviews are welcome.

Dr. Rita Sánchez Tovar
Dr. Ramón M. Fernández Domene
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. Materials 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 2600 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

  • nanomaterials
  • metal oxides
  • catalysis
  • electrochemistry
  • environmental
  • energy

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Published Papers (2 papers)

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Research

17 pages, 3565 KiB  
Article
Highly Active Co3O4-Based Catalysts for Total Oxidation of Light C1–C3 Alkanes Prepared by a Simple Soft Chemistry Method: Effect of the Heat-Treatment Temperature and Mixture of Alkanes
by Rut Sanchis, Adrián García, Francisco Ivars-Barceló, Stuart H. Taylor, Tomás García, Ana Dejoz, María Isabel Vázquez and Benjamín Solsona
Materials 2021, 14(23), 7120; https://doi.org/10.3390/ma14237120 - 23 Nov 2021
Cited by 10 | Viewed by 2721
Abstract
In the present work, a simple soft chemistry method was employed to prepare cobalt mixed oxide (Co3O4) materials, which have shown remarkably high activity in the heterogeneously catalyzed total oxidation of low reactive VOCs such as the light alkanes [...] Read more.
In the present work, a simple soft chemistry method was employed to prepare cobalt mixed oxide (Co3O4) materials, which have shown remarkably high activity in the heterogeneously catalyzed total oxidation of low reactive VOCs such as the light alkanes propane, ethane, and methane. The optimal heat-treatment temperature of the catalysts was shown to depend on the reactivity of the alkane studied. The catalytic activity of the Co3O4 catalysts was found to be as high as that of the most effective catalysts based on noble metals. The physicochemical properties, from either the bulk (using XRD, TPR, TPD-O2, and TEM) or the surface (using XPS), of the catalysts were investigated to correlate the properties with the catalytic performance in the total oxidation of VOCs. The presence of S1 low-coordinated oxygen species at the near surface of the Co3O4-based catalysts appeared to be linked with the higher reducibility of the catalysts and, consequently, with the higher catalytic activity, not only per mass of catalyst but also per surface area (enhanced areal rate). The co-presence of propane and methane in the feed at low reaction temperatures did not negatively affect the propane reactivity. However, the co-presence of propane and methane in the feed at higher reaction temperatures negatively affected the methane reactivity. Full article
(This article belongs to the Special Issue Low-Dimensional Nanomaterials: Synthesis, Classification, and Application)
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21 pages, 34637 KiB  
Article
Original Approach to Synthesize TiO2/ZnO Hybrid Nanosponges Used as Photoanodes for Photoelectrochemical Applications
by Pedro José Navarro-Gázquez, Maria José Muñoz-Portero, Encarna Blasco-Tamarit, Rita Sánchez-Tovar, Ramon Manuel Fernández-Domene and Jose García-Antón
Materials 2021, 14(21), 6441; https://doi.org/10.3390/ma14216441 - 27 Oct 2021
Cited by 6 | Viewed by 2362
Abstract
In the present work, TiO2/ZnO hybrid nanosponges have been synthesized for the first time. First, TiO2 nanosponges were obtained by anodization under hydrodynamic conditions in a glycerol/water/NH4F electrolyte. Next, in order to achieve the anatase phase of TiO [...] Read more.
In the present work, TiO2/ZnO hybrid nanosponges have been synthesized for the first time. First, TiO2 nanosponges were obtained by anodization under hydrodynamic conditions in a glycerol/water/NH4F electrolyte. Next, in order to achieve the anatase phase of TiO2 and improve its photocatalytic behaviour, the samples were annealed at 450 °C for 1 h. Once the TiO2 nanosponges were synthesized, TiO2/ZnO hybrid nanosponges were obtained by electrodeposition of ZnO on TiO2 nanosponges using different temperatures, times, and concentrations of zinc nitrate (Zn(NO3)2). TiO2/ZnO hybrid nanosponges were used as photoanodes in photoelectrochemical water splitting tests. The results indicate that the photoelectrochemical response improves, in the studied range, by increasing the temperature and the Zn(NO3)2 concentration during the electrodeposition process, obtaining an increase in the photoelectrochemical response of 141% for the TiO2/ZnO hybrid nanosponges electrodeposited at 75 °C with 10 mM Zn(NO3)2 for 15 min. Furthermore, morphological, chemical, and structural characterization was performed by Field Emission Scanning Electron Microscopy (FE-SEM) with Energy Dispersive X-Ray spectroscopy (EDX), Raman Confocal Laser Spectroscopy, X-Ray Photoelectron Spectroscopy (XPS), and Grazing Incidence X-Ray Diffraction (GIXRD). Full article
(This article belongs to the Special Issue Low-Dimensional Nanomaterials: Synthesis, Classification, and Application)
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