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Advances in TiO2 Photocatalysis
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Advances in TiO2 Photocatalysis

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

Deadline for manuscript submissions: closed (15 November 2019) | Viewed by 11928

Special Issue Editor

Dr. Giuseppina Pinuccia Cerrato

E-Mail Website
Guest Editor
Associate Professor, Department of Chemistry, Università degli Studi di Torino, Via Pietro Giuria, 7, 10125 Torino, Italy
Interests: oxide-based materials for (photo)catalysis; standard and innovative synthetic procedures; physicochemical characterization
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues, 

Heterogeneous photocatalysis is an effective way to reduce pollution in both air and water environments, and represents a possible way to face the problems related to the increasing emissions/introduction of hazardous substances. Many advantages are obvious and already reported in the literature in a long list of publications. This Special Issue, focused on the use of TiO2 in this specific field of application, aims to collect an ensemble of papers addressing recent and novel implementations of TiO2-based materials studied to directly use titania under sunlight or commercial LED light, thus overcoming its intrinsic limit linked to its large band gap. The authors will thus find the occasion to share their latest research in all the fields covered by the keywords herein.

Prof. Dr. Giuseppina Cerrato
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. 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

  • TiO2 and TiO2-based materials for photocatalysis
  • pollution abatement
  • air and water purification
  • synthesis, characterization, and applications, including at industrial level

Published Papers (3 papers)

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Research

13 pages, 3225 KiB  
Article
Morphology, Surface Structure and Water Adsorption Properties of TiO2 Nanoparticles: A Comparison of Different Commercial Samples
by Lorenzo Mino, Chiara Negri, Rosangela Santalucia, Giuseppina Cerrato, Giuseppe Spoto and Gianmario Martra
Molecules 2020, 25(20), 4605; https://doi.org/10.3390/molecules25204605 - 10 Oct 2020
Cited by 29 | Viewed by 2587
Abstract
Water is a molecule always present in the reaction environment in photocatalytic and biomedical applications of TiO2 and a better understanding of its interaction with the surface of TiO2 nanoparticles is crucial to develop materials with improved performance. In this contribution, [...] Read more.
Water is a molecule always present in the reaction environment in photocatalytic and biomedical applications of TiO2 and a better understanding of its interaction with the surface of TiO2 nanoparticles is crucial to develop materials with improved performance. In this contribution, we first studied the nature and the surface structure of the exposed facets of three commercial TiO2 samples (i.e., TiO2 P25, SX001, and PC105) by electron microscopy and IR spectroscopy of adsorbed CO. The morphological information was then correlated with the water adsorption properties, investigated at the molecular level, moving from multilayers of adsorbed H2O to the monolayer, combining medium- and near-IR spectroscopies. Finally, we assessed in a quantitative way the surface hydration state at different water equilibrium pressures by microgravimetric measurements. Full article
(This article belongs to the Special Issue Advances in TiO2 Photocatalysis)
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19 pages, 3970 KiB  
Article
Multifunctional and Environmentally Friendly TiO2–SiO2 Mesoporous Materials for Sustainable Green Buildings
by Elena Ghedini, Federica Menegazzo, Maela Manzoli, Alessandro Di Michele, Debora Puglia and Michela Signoretto
Molecules 2019, 24(23), 4226; https://doi.org/10.3390/molecules24234226 - 20 Nov 2019
Cited by 14 | Viewed by 3465
Abstract
This work deals with the formulation of environmentally friendly, cheap, and readily-available materials for green building applications, providing the function of air purificator by improving the safety and the comfort of an indoor environment. High surface area TiO2–SiO2 samples, prepared [...] Read more.
This work deals with the formulation of environmentally friendly, cheap, and readily-available materials for green building applications, providing the function of air purificator by improving the safety and the comfort of an indoor environment. High surface area TiO2–SiO2 samples, prepared by a simple, cost effective, and scalable synthetic approach, proved to be effective in maximizing the properties of each component, i.e., the photocatalytic properties of titania and the high surface area of silica. TiO2 was introduced onto an ordered mesoporous silica Santa Barbara Amorphous-15 (SBA-15), that is featured by interesting insulating features, by using an incipient wetness impregnation method. The photocatalytic activity was evaluated in gas phase oxidation of ethylbenzene, which was selected as model volatile organic compound (VOC) molecule. The morphological, textural and structural features along with the electronic properties, the hydrophilicity and heat capacity of the materials were investigated in depth by scanning electron microscopy, powder X-ray diffraction, N2 physisorption, diffuse reflectance UV-Vis, FT-IR spectroscopies, and modulated DSC (MDSC) dynamic scan. Outstanding performances in the ethylbenzene abatement results are promising for further application in the green building sector. Full article
(This article belongs to the Special Issue Advances in TiO2 Photocatalysis)
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15 pages, 4791 KiB  
Article
UV and Visible Light-Driven Production of Hydroxyl Radicals by Reduced Forms of N, F, and P Codoped Titanium Dioxide
by A. M. Abdullah, Miguel Á. Garcia-Pinilla, Suresh C. Pillai and Kevin O'Shea
Molecules 2019, 24(11), 2147; https://doi.org/10.3390/molecules24112147 - 06 Jun 2019
Cited by 45 | Viewed by 5479
Abstract
The photocatalytic activities of reduced titanium dioxide (TiO2) materials have been investigated by measuring their ability to produce hydroxyl radicals under UV and visible light irradiation. Degussa P25 TiO2 was doped with nitrogen (N), fluorine (F), and/or phosphorus (P) and [...] Read more.
The photocatalytic activities of reduced titanium dioxide (TiO2) materials have been investigated by measuring their ability to produce hydroxyl radicals under UV and visible light irradiation. Degussa P25 TiO2 was doped with nitrogen (N), fluorine (F), and/or phosphorus (P) and then subjected to surface modification employing a thermo-physicochemical process in the presence of reducing agent sodium borohydride (NaBH4). The reduced TiO2 materials were characterized by a number of X-ray, spectroscopic and imaging methods. Surface doping of TiO2 was employed to modulate the band gap energies into the visible wavelength region for better overlap with the solar spectrum. Hydroxyl radical generation, central to TiO2 photocatalytic water purification applications, was quantitated using coumarin as a trap under UV and visible light irradiation of the reduced TiO2 materials. At 350 nm irradiation, the yield of hydroxyl radicals generated by the reduced forms of TiO2 was nearly 90% of hydroxyl radicals generated by the Degussa P25 TiO2. Hydroxyl radical generation by these reduced forms of TiO2 was also observed under visible light irradiation (419 and 450 nm). These results demonstrated that simple surface modification of doped TiO2 can lead to visible light activity, which is important for more economical solar-driven applications of TiO2 photocatalysis. Full article
(This article belongs to the Special Issue Advances in TiO2 Photocatalysis)
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