20.500.12556/DKUM-17023 SINTEZA IN KARAKTERIZACIJA NANODELCEV CdTe S SONOKEMIJSKO METODO V VODNEM MEDIJU SYNTHESIS AND CHARACTERIZATION OF CdTe NANOPARTICLES BY SONOCHEMICAL METHOD IN AQUEOUS SOLUTION Namen magistrskega dela je bil sintetizirati nanodelce kadmijevega telurida (CdTe) s sonokemijsko metodo v vodnem mediju, ki jih uporabljajo v fotonapetostnih sistemih, optičnih napravah in pri zgodnjem odkrivanju ter zdravljenju rakastih obolenj. Kot izhodne snovi smo uporabili kadmijev sulfat hidrat (CdSO4•8/3H2O), kadmijev klorid (CdCl2) in elementarni telur (Te) v prahu. Kot topilo smo uporabili 5 in 10 M vodno raztopino natrijevega hidroksida (NaOH) in 0,05 M raztopino EDTA. Sintezo smo izvajali z ultrazvočno aparaturo visoke intenzitete (Sonics & Materials VCX600, 20 kHz, 80 W/cm2, 1cm2, titanova direktna imerzijska sonda). Kvalitativno karakterizacijo vzorcev in ocenitev velikosti nanodelcev smo izvedli s pomočjo rentgenske praškovne difrakcije (XRD). Morfologijo nanodelcev smo proučili s pomočjo transmisijske elektronske mikroskopije (TEM). Zanimale so nas tudi spremembe v fizikalnih in kemijskih lastnostih pripravljenih nanodelcev CdTe ob povišanju temperature, zato smo opravili tudi termične analize (TGA, SDTA). Rezultati so pokazali uspešnost sonokemijske metode pri pripravi nanodelcev kadmijevega telurida. Sinteze smo uspešno izvedli na dva načina z uporabo različnih kemikalij in s spreminjanjem reakcijskih pogojev. Ocena velikosti nanodelcev po Scherrer—jevi metodi je pokazala, da so bili nanodelci velikosti med 8,0 in 12,8 nm, kar je precej manjše od velikosti delcev CdTe, pridobljenih s klasičnimi metodami. Morfologija nanodelcev je s TEM pokazala aglomerirane produkte kubične strukture. The aim of my master paper was to synthesize cadmium telluride (CdTe) nanoparticles by sonochemical method in aqueous solution, which are used by the photovoltaic systems, optical devices, early detection and therapy of cancer. Cadmium sulphate hydrate (CdSO4•8/3H2O), cadmium chloride (CdCl2) and elementary telur (Te) were used as reagents and 10 M aqueous solution of sodium hydroxide (NaOH) and 0,05 M of EDTA solution were used as solvents. The synthesis was carried out on the basis of high-intensity ultrasound (Sonics & Materials VCX600, 20 kHz, 80 W/cm2, 1cm2, titanium direct immersion horn). The qualitative characterization and estimation of nanoparticles size were carried out by using X−ray powder difraction (XRD). The morphology of nanoparticles was analysed by transmission electron microscopy (TEM). We were also interested in the changes of physical and chemical properties of the prepared CdTe nanoparticles at increased temperature, so thermal analysis (TGA, SDTA) were applied. The results showed evidence of successful use of sonochemical synthesis in producing cadmimum telluride nanoparticles. The syntheses were successfully carried out in two ways by using different chemicals and changing the reaction conditions. X−ray powder difraction showed that the size of nanoparticles was between 8,0 and 12,8 nm, which is much smaller than the CdTe particles produced by classical methods. The morphology of nanoparticles with TEM showed cubic structure of agglomerated products. kadmijev telurid nanodelci sonokemijska sinteza rentgenska praškovna difrakcija termična analiza transmisijska elektronska mikroskopija cadmium telluride nanoparticles sonochemical synthesis X−ray powder difraction thermal analysis transmission electron microscopy true true false [A. Danč] Slovenski jezik Angleški jezik Magistrsko delo 2010-12-13 14:20:53 2010-12-21 12:26:36 2022-04-13 09:07:33 2023-12-21 03:29:09 2010 0 Maribor 0 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 544.576 14689814 URN:SI:UM:DK:VL6Q1V7A MAG_Danc_Anita_2010.pdf MAG_Danc_Anita_2010.pdf 1 5287CC46C65DE1C5DB308224738406EB f16fc8b4667b5b5c3e99d0374468da0c140c61571a0e2d27b2dee8414a88883d c9bff270-7c04-11eb-bb7a-00155d0001ca 20.500.12556/dkum/f1b591dd-c43e-46d2-8135-695a15c3839d https://dk.um.si/Dokument.php?lang=slv&id=19605 Fakulteta za kemijo in kemijsko tehnologijo 0 0 0