Sinteza nanodelcev CrNi z mikroemulzijsko metodo

diplomsko delo univerzitetnega študijskega programa

Sabina Markuš (Author), Irena Ban (Mentor), Mihael Drofenik (Co-mentor)

Abstract

Namen diplomskega dela je bil sinteza nanodelcev CrNi z mikroemulzijsko metodo. V območju stabilnosti mikroemulzij v ternarnem diagramu (voda/CTAB, n-butanol/izooktan) smo izbrali dve točki z različnimi masnimi deleži (20/40/40 in 20/50/30) in v teh dveh točkah sintetizirali CrNi magnetne nanodelce z različnimi sestavami: Cr1-xNix (x=0.7, 0.8, 0.9), pri čemer smo kot reducent uporabili NaBH4. Delce smo najprej termično obdelali s pomočjo termoanaliznega sistema TGA-SDTA v N2 atmosferi pri 500 ° C z namenom njihove homogenizacije. Zaradi možne aplikacije v medicinske namene (magnetna hipertermija) smo želeli pridobiti delce z ustrezno Curiejevo temperaturo. Delce smo v ta namen še dodatno homogenizirali v cevni peči pri temperaturi 900°C, 12 ur, v redukcijski atmosferi (Ar/H2). S tem smo hkrati želeli preprečiti oksidacijo delcev. Vzorce smo kvalitativno analizirali z rentgensko praškovno difrakcijo (XRD). S pomočjo termogravimetrične analize (TGA) smo vzorce segreli na 500 °C in jim s prirejeno TGA aparaturo določili Curiejevo temperaturo (Tc).

Keywords

mikroemulzija;magnetni nanodelci;Curierjeva temperatura;termična obdelava;rentgenska praškovna difrakcija;

Data

Language:	Slovenian
Year of publishing:	2012
Source:	Maribor
Typology:	2.11 - Undergraduate Thesis
Organization:	UM FKKT - Faculty of Chemistry and Chemical Engineering
Publisher:	[S. Markuš]
UDC:	54.057:[620.3:546.72](043.2)
COBISS:	16607254
Views:	2197
Downloads:	211
Average score:	0 (0 votes)
Metadata:

Other data

Secondary language:	English
Secondary title:	Synthesis of CrNi nanoparticles with microemulsion method
Secondary abstract:	Diploma work focuses on synthesis of nanoparticles CrNi with microemulsion method. We prepared two different compositions of microemulsions in the region of microemulsion stability with mass % (20/40/40 and 20/50/30) in ternary water/CTAB, n-butanol/isooctane diagram. In those two compositions we synthesized CrNi magnetic nanoparticles of different alloy compositions: Cr1-xNix whereas (x = 07, 08 and 09). The reducing agent was NaBH4. The particles were first thermal treated with the TGA-SDTA thermoanalytical system in N2 at 500°C because of homogenization. Because of the application for medical purposes (magnetic hyperthermia) we tried to get the particles with appropriate Curie temperature. So, we additionally homogenised particles in a tube furnace at 900°C for 12 hours under reducing atmosphere (Ar/H2). With that, we tried to prevent the particles from oxidation. A qualitative analysis of the samples was carried out using the X-ray diffraction (XRD) and the Curie temperature measured with thermogravimetric analysis (TGA) which was also used to heat the samples to 500°C.
Secondary keywords:	microemulsion;magnetic nanoparticles;Curie temperature;thermal treatment;powder x-ray diffraction;
URN:	URN:SI:UM:
Type (COBISS):	Bachelor thesis/paper
Thesis comment:	Univ. v Mariboru, Fak. za kemijo in kemijsko tehnologijo
Pages:	XI, 38 str.
Keywords (UDC):	mathematics;natural sciences;naravoslovne vede;matematika;chemistry;crystallography;mineralogy;kemija;production;preparation;isolation;purification etc;;mathematics;natural sciences;naravoslovne vede;matematika;chemistry;crystallography;mineralogy;kemija;inorganic chemistry;anorganska kemija;
ID:	993929