Special Issue "TiO2-based Nanostructures, Composites and Hybrid Photocatalysts"
Deadline for manuscript submissions: 30 November 2019
Dr. Stefano Lettieri
National Research Council of Italy, Institute of Applied Sciences and Intelligent Systems "Eduardo Caianiello" (ISASI-CNR), Pozzuoli, Italy
Website | E-Mail
Interests: multifunctional metal oxides; semiconductor nanostructures; photocatalytic materials; titanium dioxide; semiconductor optics; non-linear optical spectroscopy; photoluminescence; gas sensing; optical sensors
Environmental pollution and depletion of fossil fuels represent two crucial obstacles for the sustainable development of contemporary human society. It is becoming more and more imperative to accelerate the develompment of green technologies capable to control and reduce pollution growth. Hence, it can be easily foreseen that confronting these issues will engage increasing efforts and resources.
Among the research and development fields dealing with the mentioned issues, those employing photocatalysis are likely to grow in relevance and spread new applications and technologies. Titanium dioxide (TiO2) is nowdays one of the most widely used photocatalytic materials due to its ability to oxidatively decompose organic pollutants, low cost, durability and corrosion resistance. It is employed in several applications in the energy and environmental fields, including, for example: hydrogen evolution, photoelectrochemical conversion, photodegradation of organic contaminants, air and water purification systems, sterilization and bacterial detoxification. TiO2 also proved to be useful for other applications, such as gas sensing, bone implant fixation, drug delivery, etc.
Much effort is nowdays focusing on TiO2 modifications enambling to extend the TiO2 optical absorption toward the visible range (in order to operate effectively under natural sunlight irradiation) and to improve the spatial separation of photogenerated charges. To these aims, several TiO2 doping strategies and TiO2-based hybrid composites have been scrutinized. In these kind of studies, foundational knowledge of the basic physical and chemical properties of the involved materials/components involved is required, as well as exhaustive investigations of the targeted application.
The aim of this Special Issue is to cover the main aspects of fundamental and applied research of TiO2 and TiO2-based materials and composites, such as (but not limited to) the following:
- Fundamental properties of TiO2 nanostructures: electronic states, defects, structural properties, optical properties, etc.
- Synthesis of bulk TiO2 crystals, TiO2 nanoparticles and thin films
- Modification of TiO2 nanostructures through doping, including non-metal doping (e.g. nitrogen-doped TiO2, fluorine-doped TiO2, carbon-doped TiO2, etc.) and metal doping (e.g. Fe/TiO2, Cu/TiO2, Au/TiO2, Ag/TiO2, Pd/TiO2, Pt/TiO2, etc.)
- Self-doped TiO2 nanostructures: oxygen vacancies, black titania, etc.
- Composites and hybrid photocatalysts based on TiO2 and carbon nanomaterials (e.g. TiO2/graphene, TiO2/graphene oxide, TiO2/carbon nanotubes, TiO2/g-C3N4, etc.) or on TiO2 and inorganic materials (e.g. TiO2/MoS2 and other 2D transition metal dichalcogenides)
- Applications, including water remediation, degradation of dyes and/or farmaceuticals, CO2 reduction, hydrogen evolution, fuels production, plasmonic photocatalysis, TiO2-based composites in perovskite solar cells, gas sensors, biosensors and biomedical applications, etc.
It is my pleasure to invite you to submit a manuscript for this Special Issue. Full papers, communications, and reviews are all welcome.
Dr. Stefano Lettieri
Manuscript Submission Information
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- TiO2-based nanostructures and composites
- TiO2-based hybrid photocatalysts
- water remediation
- environmental applications and green technologies
- CO2 reduction
- hydrogen production
- energy applications
The below list represents only planned manuscripts. Some of these manuscripts have not been received by the Editorial Office yet. Papers submitted to MDPI journals are subject to peer-review.
Development of Titanium and Graphene Oxide (TiO2/GO) as Moisture Sensor
Diogo José Horst, Pedro Paulo de Andrade Junior, Charles Adriano Duvoisin, Rogério de Almeida Vieira
Federal University of Santa Catarina; Federal University of São Paulo
In this study we intend to verify the sensing capacity of titanium and graphene oxides (TiO2/GO) with variations in the experimental parameters applied. The TiO2 will be deposited in a graphene matrix via Chemical Vapor Deposition (CVD) in atmosphere of oxygen with argon thus generating a composite. The effect of the applied methodology and experimental parameters on the morphology, particle size, sample uniformity and (TiO2/GO) properties will be studied. All samples will be analyzed by X-ray Diffraction (XRD) for determination of the present phases, Scanning Electron Microscopy (SEM) to verify the microstructure and by Differential Scanning Calorimetry (DSC) to establish the temperature ranges at which the transitions of the phase, as well as to determine its dependence with the heating rate and also the specific temperature variation as a function of temperature for the studied materials. According to preliminary results obtained, rare earths will be chosen to dope the sensor in a new synthesis, seeking to optimize the sensor capacity by searching for applications of technological interest. The sensitivity of the material will be verified through a Wheatstone bridge in direct current or alternating current, through its resistive property, thus proving the use of this composite as humidity sensor.