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Home    Σύνθεση κβαντικών ψηφίδων (QD's) SnS 2 και μελέτη της φωτοκαταλυτικής του ικανότητας για την παραγωγή υδρογόνου  

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Title Σύνθεση κβαντικών ψηφίδων (QD's) SnS 2 και μελέτη της φωτοκαταλυτικής του ικανότητας για την παραγωγή υδρογόνου
Author Μήλιωσης, Γεώργιος
Thesis advisor Κουτσολέλος, Αθανάσιος Γ.
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).
Language Greek
Subject Dispersion
Hot injection method
Hydrogen generation
Metal dichalcogenides
Photocatalytic activity
Quantum dots
Semiconductor nanoparticles
Solar energy
Tin disulfide
Ultrasonic exfoliation
Διασπορά
Διχαλκογονίδια μετάλλων
Ηλιακή ενέργεια
Ημιαγώγιμα
Θειούχος κασσίτερος
Κβαντικές ψηφίδες
Μέθοδος ζεστής έγχυσης
Νανοσωματίδια
Φωτοκαταλυτική δραστηριότητα
Issue date 2017-07-21
Collection   School/Department--School of Sciences and Engineering--Department of Chemistry--Graduate theses
  Type of Work--Graduate theses
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