28 research outputs found
Speakers and Structures in Language Contact Pluralistic Approaches to Change and Variation
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Conceptual model for managing historical buildings rehabilitation. Case study: built environment asset rahabilitation in Ortigia, Siracusa
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Analysis of the differencies between pollution levels into a new and an old district of a big city using dispersion simulations at microscale
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Concorso Città di Pietra. La Biennale di Venezia. X Mostra Internazionale di Architettura. Sensi Contemporanei: Progetto Sud. Progetto elaborato dal gruppo Cantone.
No full textNanocomposite materials for photocatalytic degradation of pollutants
No full textPhoto-oxidation processes assisted by nanosized semiconductors are
receiving increasing attention due to their potential application in
environmental field. The ability to exploit the strong potential of
photoactive nanomaterials and access their properties relies on the
ability to integrate them in photo-reactors and to effectively deposit
them on large surfaces. Such a strategy can bridge the gap between the
nanoscopic and mesoscopic scale and avoiding nanoparticle release in the
environment. In order to integrate nanopartides in functional structures
and, finally, devices, their incorporation in suitable host matrices is
crucial to achieve processable nanocomposite materials. Here, a
comprehensive overview on the preparation of photocatalytic
nanocomposite materials and their application for pollutants degradation
will be provided. In particular, we will focus on modern synthetic
approaches to synthetize UV and visible light active nanocatalysts, on
their post-synthesis surface functionalization and on their
incorporation in suitable host matrices toward nanocomposite
preparation. Finally, some examples from recent literature on their
application in environmental remediation and as bactericidal and
self-cleaning coatings will be reported
Low temperature synthesis of photocatalytic mesoporous tio2 nanomaterials
No full textWe report the synthesis of mesoporous TiO2 nanostructures based on the decomposition of TiOSO4 in aqueous alkaline solution at room temperature, followed by mild thermal treatment (110◦C) in an oven and suitable to yield up to 40 g of product per batch. The duration of the thermal treatment was found to be crucial to control crystalline phase composition, specific surface area, surface chemistry and, accordingly, the photocatalytic properties of the obtained TiO2 nanocrystals. The thorough investigation of the prepared samples allowed us to explain the relationship between the structure of the obtained nanoparticles and their photocatalytic behavior, that was tested in a model reaction. In addition, the advantage of the mild treatment against a harsher calcination at 450◦C was illustrated. The proposed approach represents a facile and sustainable route to promptly access an effective photocatalyst, thus holding a significant promise for the development of solutions suitable to real technological application in environmental depollution
