Graduate theses
Current Record: 33 of 1623
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Title |
Μελέτη της φωτοκαταλυτικής οξείδωσης των αερίων οξειδίων του αζώτου (NOX) με χρήση οξειδίων μετάλλων |
Author
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Φιλίππου, Ελένη
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Thesis advisor
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Κομίνης, Ιωάννης
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Reviewer
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Μπίνας, Βασίλειος
Γκαγκαουδάκης, Εμμανουήλ
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Abstract |
Over the years, there is a growing need to find effective methods to minimize organic
and inorganic pollutants in indoor and outdoor air, with the ultimate purpose of
improving its quality, to address environmental issues and impacts on human health, the
which result from their high concentration.
Photocatalysis, is a method with significant application advantages, which involves the
adsorption of reactants on the surface of the catalyst and upon irradiation by photons of
appropriate wavelength, produces active chemical elements with a strong oxidizing
effect, thus significantly minimizing air pollutants.
The purpose of this thesis is to study the photocatalytic oxidation of gaseous nitrogen
oxides (NOx) using metal oxides. More specifically, the present work was called to
modify the titanium dioxide (TiO2) material for its application under visible radiation by
using nitrogen-doping, where ammonium nitrate (NH4NO3), urea (CO(NH2) 2) and
thiourea (CH4N2S) were used as nitrogen sources. Furthermore, the deposition of
photocatalytic paste on substrates of different porosity was investigated. Experiments
were carried out in the presence of visible light irradiation aimed at degrading the
pollutant nitric oxide (NO), the results of the photocatalytic activity of the samples were
recorded. The photocatalytic activity of the best materials on different substrates was also
studied. Furthermore, an unsuccessful attempt was made to create nitrogen impurities in
the zinc oxide (ZnO) material, as the sample prepared from this composition flaked
twice, more details are given in the appendix.
The structure and the morphological characterization of materials are completed by X-
ray diffraction (XRD), the Scanning Electron Microscopy (SEM) and the Energy
dispersive X-ray spectroscopy EDS.
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Language |
Greek |
Subject |
Air pollution |
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Air quality |
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Atmospheric pollution |
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Nitrogen oxides |
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Photocatalysis |
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Pollutants |
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Ατμοσφαιρική ρύπανση |
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Οξείδια του αζώτου |
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Ποιότητα αέρα |
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Ρύπανση αέρα |
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Ρύποι |
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ΤiO2 |
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Φωτοκατάλυση |
Issue date |
2023-11-22 |
Collection
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School/Department--School of Sciences and Engineering--Department of Physics--Graduate theses
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Type of Work--Graduate theses
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Permanent Link |
https://elocus.lib.uoc.gr//dlib/0/1/d/metadata-dlib-1695656483-985273-2498.tkl
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Views |
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