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Nanomaterials
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Structure, Synthesis and Applications of TiO2-Based Nanomaterials
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Structure, Synthesis and Applications of TiO2-Based Nanomaterials

A special issue of Nanomaterials (ISSN 2079-4991). This special issue belongs to the section "Energy and Catalysis".

Deadline for manuscript submissions: closed (30 June 2021) | Viewed by 12677

Special Issue Editor

Dr. Dorian A.H. Hanaor

E-Mail Website
Guest Editor
Chair of Advanced Ceramic Materials, Technical University of Berlin, Berlin, Germany
Interests: ceramic materials; cross-disciplinary integration; multi-scale systems
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Functional titanium dioxide-based nanomaterials and nanocomposites are the subject of renewed contemporary interest towards diverse applications in the fields of energy materials, environmental remediation, and chemical engineering. While the promise of high-performance titanium dioxide photocatalysts has been decades in the pipeline, only in recent years has the scope and performance of applied TiO2 systems undergone significant growth, motivating an in-depth examination of approaches to consolidate recent advances with an emphasis on effective materials design.

Driven by developments in predictive analysis, synthesis techniques, and system design, TiO2 host structures are able to serve in diverse roles including photocatalysts, catalyst supports, and battery electrode materials, to name but a few.

Progress towards the implementation of TiO2 encompasses five main areas: (1) The synthesis of TiO2 nanostructures such as nanotubes, nanoflowers, nanospheres, and mesocrystals; (2) The fabrication of multi-scale heterostructures; (3) Functionalization with secondary phases including metal/metal oxide nanoparticles, graphene and carbon nanotubes; (4) The modification of TiO2 lattices through cation and anion substitution and doping, and (5) design and fabrication of functional titania based systems towards specific applications.

For this Special Issue, we invite contributions from researchers working on applied TiO2 materials across diverse fields. To create a multi-disciplinary perspective, the papers presented in this issue will show how developments from multiple aspects can be combined to impart high levels of functionality to TiO2-based materials, with an emphasis on the design and processing of nanomaterials and nanocomposites.

Dr. Dorian A.H. Hanaor
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

  • TiO2
  • Nanocomposites
  • Synthesis
  • Materials design
  • Photocatalysis
  • Energy materials

Published Papers (4 papers)

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Research

10 pages, 3288 KiB  
Article
Chemical Degradation of Methylene Blue Dye Using TiO2/Au Nanoparticles
by Luiza Izabela Jinga, Gianina Popescu-Pelin, Gabriel Socol, Sorin Mocanu, Madalina Tudose, Daniela C. Culita, Andrei Kuncser and Petre Ionita
Nanomaterials 2021, 11(6), 1605; https://doi.org/10.3390/nano11061605 - 18 Jun 2021
Cited by 11 | Viewed by 2783
Abstract
Gold nanoparticles (~10 nm) were deposited on titanium dioxide nanoparticles (~21 nm) and the material obtained was characterized using IR, UV-Vis, N2 adsorption–desorption isotherm, DLS, EDS (EDX), TEM, XPS, and XRD techniques. It was found that the methylene blue dye is degraded [...] Read more.
Gold nanoparticles (~10 nm) were deposited on titanium dioxide nanoparticles (~21 nm) and the material obtained was characterized using IR, UV-Vis, N2 adsorption–desorption isotherm, DLS, EDS (EDX), TEM, XPS, and XRD techniques. It was found that the methylene blue dye is degraded in the presence of this material when using hydrogen peroxide as the oxidant. Tests were performed at 2, 4, 6, and 24 h, with hydrogen peroxide contents varying from 1 to 5 mg/mL. Longer exposure time and a higher content of oxidant led to the degradation of methylene blue dye at up to 90%. The material can be reused several times with no loss of activity. Full article
(This article belongs to the Special Issue Structure, Synthesis and Applications of TiO2-Based Nanomaterials)
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13 pages, 1723 KiB  
Article
Photocatalytic Oxidation of Propane Using Hydrothermally Prepared Anatase-Brookite-Rutile TiO2 Samples. An In Situ DRIFTS Study
by Laura Cano-Casanova, Bastian Mei, Guido Mul, María Ángeles Lillo-Ródenas and María del Carmen Román-Martínez
Nanomaterials 2020, 10(7), 1314; https://doi.org/10.3390/nano10071314 - 4 Jul 2020
Cited by 9 | Viewed by 2750
Abstract
Photocatalytic oxidation of propane using hydrothermally synthesized TiO2 samples with similar primary crystal size containing different ratios of anatase, brookite and rutile phases has been studied by measuring light-induced propane conversion and in situ DRIFTS (diffuse reflectance Fourier transform infrared spectroscopy). Propane [...] Read more.
Photocatalytic oxidation of propane using hydrothermally synthesized TiO2 samples with similar primary crystal size containing different ratios of anatase, brookite and rutile phases has been studied by measuring light-induced propane conversion and in situ DRIFTS (diffuse reflectance Fourier transform infrared spectroscopy). Propane was found to adsorb on the photocatalysts, both in the absence and presence of light. The extent of adsorption depends on the phase composition of synthesized titania powders and, in general, it decreases with increasing rutile and brookite content. Still, the intrinsic activity for photocatalytic decomposition of propane is higher for photocatalysts with lower ability for propane adsorption, suggesting this is not the rate-limiting step. In situ DRIFTS analysis shows that bands related to adsorbed acetone, formate and bicarbonate species appear on the surface of the photocatalysts during illumination. Correlation of propane conversion and infrared (IR) data shows that the presence of formate and bicarbonate species, in excess with respect to acetone, is composition dependent, and results in relatively low activity of the respective TiO2. This study highlights the need for precise control of the phase composition to optimize rates in the photocatalytic oxidation of propane and a high rutile content seems to be favorable. Full article
(This article belongs to the Special Issue Structure, Synthesis and Applications of TiO2-Based Nanomaterials)
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8 pages, 1922 KiB  
Article
Use of Chalcogenide-Semiconductor-Sensitized Titania to Directly Charge a Vanadium Redox Battery
by Tatiana Santos Andrade, Anastasios Keramidas and Panagiotis Lianos
Nanomaterials 2020, 10(6), 1137; https://doi.org/10.3390/nano10061137 - 9 Jun 2020
Cited by 2 | Viewed by 1995
Abstract
Unmediated charging of a battery using solar radiation is a very attractive project of solar energy conversion and storage. In the present work, solar energy was converted into electricity using a photocatalytic fuel cell operating with a chalcogenide-semiconductor-sensitized nanoparticulate titania photoanode and an [...] Read more.
Unmediated charging of a battery using solar radiation is a very attractive project of solar energy conversion and storage. In the present work, solar energy was converted into electricity using a photocatalytic fuel cell operating with a chalcogenide-semiconductor-sensitized nanoparticulate titania photoanode and an air-cathode functioning by oxygen reduction. This cell produced sufficient energy to directly charge a vanadium redox battery functioning with a VOSO4 electrolyte and carbon paper electrodes. The whole system is characterized by ease of construction and simplicity of conception; therefore, it satisfies conditions for practical applications. Full article
(This article belongs to the Special Issue Structure, Synthesis and Applications of TiO2-Based Nanomaterials)
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14 pages, 7134 KiB  
Article
Biocompatible Ag/Fe-Enhanced TiO2 Nanoparticles as an Effective Compound in Sunscreens
by Adrian Ionut Nicoara, Vladimir Lucian Ene, Bianca Beatrice Voicu, Mihaela Adriana Bucur, Ionela Andreea Neacsu, Bogdan Stefan Vasile and Florin Iordache
Nanomaterials 2020, 10(3), 570; https://doi.org/10.3390/nano10030570 - 21 Mar 2020
Cited by 14 | Viewed by 4534
Abstract
In this work, valuable biocompatible Ag/Fe-enhanced TiO2 nanoparticles are comparatively prepared by a conventional wet chemistry method (sol-gel) and a rapid, efficient, hybrid unconventional method (microwave-assisted hydrothermal synthesis). In order to establish their application as effective compounds in sunscreens, the obtained powders [...] Read more.
In this work, valuable biocompatible Ag/Fe-enhanced TiO2 nanoparticles are comparatively prepared by a conventional wet chemistry method (sol-gel) and a rapid, efficient, hybrid unconventional method (microwave-assisted hydrothermal synthesis). In order to establish their application as effective compounds in sunscreens, the obtained powders were first structurally and morphologically characterized, analyses from which their nanodimensional character, crystalline structure and thermal behavior were highlighted. The evaluation of sunscreen effectiveness is based on the determination of the sun protection factor (SPF). It was observed that silver enhancing increases the SPF significantly, especially when compared to the pristine samples. The obtained Ag/Fe-enhanced TiO2 powders were also evaluated from the point of view of their biocompatibility on amniotic fluid stem cells, and the results indicated an enhance of cell proliferation when exposed to the synthesized nanostructures. Full article
(This article belongs to the Special Issue Structure, Synthesis and Applications of TiO2-Based Nanomaterials)
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