Graduate theses
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Title |
Σύνθεση κβαντικών ψηφίδων (QD's) SnS 2 και μελέτη της φωτοκαταλυτικής του ικανότητας για την παραγωγή υδρογόνου |
Author
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Μήλιωσης, Γεώργιος
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Thesis advisor
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Κουτσολέλος, Αθανάσιος Γ.
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Abstract |
Τhe current lifestyle combined with the increased energy needs and the need
to reduce greenhouse gas emissions has shown the need for milder forms of energy,
while at the same time being more environmentally friendly. Hydrogen is
considered as one of the leading alternative energy sources as it is the simplest,
lighter but also the most energy to weight ratio of all other fuels. It is also extremely
environmentally friendly as only water is produced from its combustion. Today's
hydrogen production is mainly achieved by reforming methane and water and
carbon dioxide is produced as a byproduct. But methane is a non renewable source
of energy, and carbon dioxide releases a number of problems . For this, it is
necessary to find a way of producing hydrogen from water using solar energy. In the
present study we synthesized quantum dots of tin disulfide by the hot injection
method, then dispersed them by ultrasonic bath and ultrasonic probe in various
solvents and finally we used them for the photocatalytic hydrogen evolution.
Quantum dots are semiconductor nanoparticles that exhibit unique optical and
electronic properties, resulting in their photocatalytic activity for the reduction of
hydrogen cations and the production of molecular hydrogen from water.
The motivation for the present work comes from previous studies in which
they had synthesized quantum dots of various metall dichalcogenides and had used
them for the production of molecular hydrogen.
In the present thesis we synthesized quantum dots of tin disulfide by the hot
injection method and attempts were made for the photocatalytic production of
hydrogen. Our association has been extensively characterized by various techniques
such as UV-Vis spectroscopy, AFM atomic force microscopy, SEM scanning electron
microscopy, XRD x-ray diffraction, and P-RAMAN spectroscopy. Measurements have
also been made to produce hydrogen in a gas chromatograph (GC).
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Language |
Greek |
Subject |
Dispersion |
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Hot injection method |
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Hydrogen generation |
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Metal dichalcogenides |
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Photocatalytic activity |
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Quantum dots |
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Semiconductor nanoparticles |
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Solar energy |
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Tin disulfide |
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Ultrasonic exfoliation |
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Διασπορά |
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Διχαλκογονίδια μετάλλων |
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Ηλιακή ενέργεια |
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Ημιαγώγιμα |
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Θειούχος κασσίτερος |
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Κβαντικές ψηφίδες |
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Μέθοδος ζεστής έγχυσης |
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Νανοσωματίδια |
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Φωτοκαταλυτική δραστηριότητα |
Issue date |
2017-07-21 |
Collection
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School/Department--School of Sciences and Engineering--Department of Chemistry--Graduate theses
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Type of Work--Graduate theses
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Permanent Link |
https://elocus.lib.uoc.gr//dlib/d/d/e/metadata-dlib-1501570016-599802-14263.tkl
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Views |
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