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Title:
SONOKEMIJSKA SINTEZA IN KARAKTERIZACIJA BAKROVIH SULFIDOV V VODNEM MEDIJU
Authors:
ID
Hojnik, Nuša
(Author)
ID
Kristl, Matjaž
(Mentor)
More about this mentor...
ID
Drofenik, Miha
(Comentor)
Files:
UNI_Hojnik_Nusa_2011.pdf
(1,74 MB)
MD5: B50C2CA1CFB51243A1AF5766F16CBE2B
PID:
20.500.12556/dkum/20ec012d-5dbf-44f5-9b95-0c62ad801231
Language:
Slovenian
Work type:
Undergraduate thesis
Organization:
FKKT - Faculty of Chemistry and Chemical Engineering
Abstract:
Sonokemija je področje kemije, kjer kemijske reakcije potekajo pod vplivom zvočne energije v obliki ultrazvoka. Ultrazvok in z njimi povezani pojavi so že znani več kot sto let, njegova uporaba v kemiji pa dosega razcvet v današnjem času. Naše raziskave so temeljile na sintezah nanodelcev bakrovih sulfidov (CuS) s sonokemijsko metodo. Ta metoda se je pri sintezah pokazala kot zelo uporabna, saj so končni produkti nanokristalinični materiali. Namen raziskave je bil sintetizirati polprevodniške nanodelce bakrovega sulfida (CuS) v vodnem mediju. Pri sintezah smo uporabili direktno imerzijsko ultrazvočno sondo proizvajalca VibraCell. Pripravljene produkte smo karakterizirali z rentgensko praškovno difrakcijo (XRD) in termičnogravimetrično analizo (TGA). Da smo dosegli optimalne pogoje, smo spreminjali različne parametre, npr. topilo, vir bakra, vir žvepla, atmosfero in čas ultrazvočnega obsevanja. Zanimanje za uporabo anorganskih nanodelcev bakrovih halkogenidov se v zadnjih letih povečuje zaradi njihovih polprevodniških lastnosti, kar omogoča uporabo pri izdelavi fotoprevodniških materialov, optičnih filtrov in predvsem pri izdelavi fotocelic. Bakrovi sulfidi so zanimivi zaradi možnosti formiranja različnih nestehiometričnih spojin. Zaradi njihove kompleksne strukture in valenčnega stanja imajo nekatere unikatne lastnosti. Bakrovi sulfidi izkazujejo kovinsko prevodnost in se pri 1,6 K spremenijo v super prevodnik. Sinteza halkogenidov je v zadnjih letih precej v razvoju in dosega vedno večje zanimanje na področju optike, elektronike, fotovoltaike, medicine in drugih področjih.
Keywords:
Sonokemija
,
rentgenska praškovna difrakcija
,
termična analiza
,
nanodelci
,
bakrov sulfid
Place of publishing:
Maribor
Publisher:
[N. Hojnik]
Year of publishing:
2011
PID:
20.500.12556/DKUM-20093
UDC:
544.576:549.332(043.2)
COBISS.SI-ID:
15370262
NUK URN:
URN:SI:UM:DK:TAT5CAZN
Publication date in DKUM:
08.09.2011
Views:
3033
Downloads:
254
Metadata:
Categories:
KTFMB - FKKT
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:
HOJNIK, Nuša, 2011,
SONOKEMIJSKA SINTEZA IN KARAKTERIZACIJA BAKROVIH SULFIDOV V VODNEM MEDIJU
[online]. Bachelor’s thesis. Maribor : N. Hojnik. [Accessed 5 April 2025]. Retrieved from: https://dk.um.si/IzpisGradiva.php?lang=eng&id=20093
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Secondary language
Language:
English
Title:
SYNTHESIS AND CHARACTERIZATION OF COPPER SULFIDES BY SONOCHEMICAL METHOD IN AQUEOUS SOLUTION
Abstract:
Sonochemistry is a filed of chemistry in which chemical reactions are critically influenced by sound energy in from of ultrasound. Ultrasound and related phenomena have been known for more than hundred years, while their use in chemistry has prospered only in recent times. Our research was based on synthesis of copper sulfides (CuS), by using the sonochemistry method. This method proved to be a very useful way of synthesis because of its final products – nanocrystal materials. The aim of the research was to synthesize semiconductor copper sulfide (CuS) in aqueous solution. For the synthesis we used direct immersion ultrasound probe made by Vibracell. The prepared products were characterized by X-Ray diffraction (XRD), thernal analysis (TGA). To achieve optimum conditions, we varied different parameters, eg. solvent, the source of copper, sulfur source, atmosphere and time of ultrasonic irradiation. In recent years, the interest in using inorganic nanoparticles of copper chalcogenides is increasing due to their semiconductor properties, allowing the use in the manufacture of photoconductive materials, optical filters and especially in the manufacture of solar cells. Copper sulfides are interesting due to their ability to form compounds with various stoichiometries. Their complex structure and valence state result in some unique properties. CuS shows metallic conductivity and transforms at 1.6 K into a superconductor. Recent syntheses of chalcogenides are in the process of development and achieves more interests in optical and electronic devices, photovoltaics, medicine and many other devices.
Keywords:
Sonochemistry
,
X-Ray diffraction
,
thermal analysis
,
nanoparticles
,
copper sulfide
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