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Identifier

000352815

Title

Εναπόθεση λεπτών υμενίων οξειδίου του ψευδαργύρου (Zn1-xAlxO) και μελέτη της φωτοκαταλυτικής διάσπασης στεαρικού οξέος

Alternative Title

Deposition of zinc oxide thin films(Zn1-xAlxO) photodegradation of stearic acid

Author

Γιαννακουδάκης, Ζαχαρίας Φ.

Thesis advisor

Τρικαλίτης, Παντελής
Κατσαράκης, Νίκος

Abstract

The objective of this dissertation is the study of the photocatalytic activity of zinc oxide thin films Zn_1-xAl_xO (x=0, 1, 3, 5 % w/w) deposited by the sol-gel and ultrasonic spray pyrolysis techniques with respect to the photodegradation of stearic acid. These are innovative, inexpensive and environmental-friendly chemical techniques for the production of metal oxide thin films in an industrial scale, while providing at the same time the possibility of large-area depositions. The structural, morphological and optical properties of the Zn_1-xAl_xO samples were investigated together with their photocatalytic activity under UV-A light (365nm) illumination. Moreover, the photocatalytic activity dependence on growth parameters such as deposition temperature and time, precursor solution, distance between nozzle and substrate and Al-doping concentration is thoroughly examined. Depending on deposition parameters and technique applied, the Zn_1-xAl_xO samples show different thickness, crystallinity, morphology and optical properties, and thus exhibit diverse photocatalytic activity concerning the photodegradation of stearic acid. It is concluded that Zn_1-xAl_xO thin films deposited via chemical routes onto glass substrates under mild conditions show quite encouraging results concerning the photocatalytic degradation of stearic acid under UV-A light exposure, and could be thus considered as strong candidates for application in photocatalytic windows.

Language

Greek

Subject

Zinc oxide

photocatalysis

stearic acid

thin films

Λεπτά υμένια

Οξείδιο του ψευδαργύρου

Στεαρικό οξύ

Φωτοκατάλυση

Issue date