20.500.12556/DKUM-94425 Nanokompoziti v sistemu Fe-Cu: sinteza, karakterizacija in potencial za uporabo v magnetni hipertermiji Nanocomposites in the Fe-Cu system: synthesis, characterization and potential for application in magnetic hyperthermia Diplomsko delo prikazuje sintezo FeCu magnetnih nanodelcev z uporabo prahu železa in bakra v visokoenergetskem planetarnem mikromlinu ter z uporabo koprecipitacije, pri kateri smo uporabili železove in bakrove nitrate ter sulfate. S sintezami smo želeli pridobiti in analizirati delce, ki bi imeli ustrezno Curiejevo temperaturo (TC) in bi jih lahko uporabili v magnetni hipertermiji. Najprej smo FeCu zlitine sintetizirali s pomočjo visokoenergetskega planetarnega mikromlina, vendar nam je zaradi tehnične okvare planetarnega mikromlina uspelo izvesti le tri mletja. Preučili smo le, kako na sintezo vpliva suho in mokro mletje pri enakem času mletja in inertni atmosferi. Pridobljenim vzorcem smo z modificirano termogravimetrično analizo (TGA) določili TC, z rentgensko praškovno difrakcijo (RTG) pa sestavo in povprečno velikost nanodelcev, ki je znašala 6,9 nm. Rezultati kažejo, da je suho mletje primerljivo z mokrim, saj je TC približno enak. Za naslednjo metodo sintetiziranja smo izbrali metodo koprecipitacije. Kot reducent smo uporabili natrijev borohidrid, kot prekurzorja pa železove in bakrove soli. Za sintezo FeCu nanodelcev smo železove in bakrove soli v molskem razmerju 43 : 57 raztopili v vodi ali v mešanici vode in etanola. Sinteze smo izvajali pri različnih pogojih. Raziskovali smo, kako pH, vrsta reducenta in topila vplivajo na lastnosti končnega produkta. Opazovali smo spremembo barve in magnetne lastnosti. Vzorcema, ki sta imela opazne magnetne lastnosti, smo ponovno z TGA določili TC, z RTG pa sestavo in povprečno velikost nanodelcev, ki je znašala 7,3 nm. Rezultati so pokazali, da so nastali železovi oksidi. Zlitine FeCu z ustrezno TC nismo uspeli sintetizirati. This thesis presents the synthesis of magnetic FeCu nanoparticles using iron and copper powders in a high-energy planetary micromill, and by coprecipitation, using iron and copper nitrates and sulphates. The aim of the synthesis was to obtain and analyse particles with a suitable Curie temperature (Tc) that can be used in magnetic hyperthermia. Originally, FeCu alloys were synthesised using a high-energy planetary micromill. However, due to a technical malfunction of the planetary mill, we were only able to carry out three grinding experiments. We investigated the effect of dry and wet milling, on the synthesis at identical milling times and in an inert atmosphere, The samples obtained were analysed using modified thermogravimetric analysis (TGA) to determine the Tc, and X-ray powder diffraction (XRD) to determine the composition and average nanoparticle size, which was 6.9 nm. The results show that dry milling is comparable to wet milling, as the Tc was approximately the same. For the next synthesis method, we chose coprecipitation. Sodium borohydride was used as a reducing agent, while iron and copper salts were used as starting materials. For the synthesis of FeCu nanoparticles, iron and copper salts were dissolved in a molar ratio of 43:57 either in water or in a water-ethanol mixture. The syntheses were carried out under different conditions. We investigated how the pH value, the type of reducing agent, and the solvent influence the properties of the final product. Changes in colour and magnetic properties were observed. For the samples that showed conspicuous magnetic properties the Tc was determined again by TGA, while the composition and average size of the nanoparticles, which was 7.3 nm, was determined by XRD. The results showed that iron oxides were formed. We did not succeed in synthesising FeCu alloys with a suitable Tc. FeCu magnetni nanodelci mehansko mletje koprecipitacija Curiejeva temperatura magnetna hipertermija. FeCu magnetic nanoparticles mechanical milling coprecipitation Curie temperature magnetic hyperthermia. true true false Slovenski jezik Angleški jezik Diplomsko delo/naloga 2025-08-17 18:20:25 2026-09-07 13:34:00 2026-09-08 03:09:18 0000-00-00 00:00:00 2026 0 Maribor 0 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 UN_Bacani_Iztok_2026.pdf UN_Bacani_Iztok_2026.pdf 1 1007F31C543DF9A9AF2C395624A5463C 7076a84a8598270b7f9d5377fb6084446afd7c1210d3448ed107c7fc0bd7c28c 21ad53d2-9cc7-11f1-b47c-00155d0001be https://dk.um.si/Dokument.php?lang=slv&id=210065 Fakulteta za kemijo in kemijsko tehnologijo 0 0 0