| | SLO | ENG | Cookies and privacy

Bigger font | Smaller font

Show document Help

Title:Sinteza maghemita iz železovega oksalata
Authors:ID Vučko, Maja (Author)
ID Kristl, Matjaž (Mentor) More about this mentor... New window
ID Drofenik, Mihael (Comentor)
Files:.pdf UNI_Vucko_Maja_2009.pdf (3,47 MB)
MD5: 5BD90AF745358FEAB6A15B456C03982C
PID: 20.500.12556/dkum/e0d675a7-bec0-4421-8e71-0bc4a1911a68
 
Language:Slovenian
Work type:Undergraduate thesis
Organization:FNM - Faculty of Natural Sciences and Mathematics
Abstract:Namen diplomskega dela je bil raziskati sintezo nanopalčk železovega oksalata dihidrata, FeC2O4 • 2 H2O, in njegovo pretvorbo v maghemit, γ – Fe2O3, preko kontroliranega termičnega razkroja. Pri reakciji smo uporabili anionski surfaktant AOT, ki je pomemben za kontroliranje oblike in velikosti produktov. Pripravili smo dve identični raztopini. AOT je bil najprej raztopljen v mešanih raztopinah, sestavljenih iz etilenglikola, C2H4(OH)2, in destilirane vode, H2O. Raztopini smo mešali 30 minut. Pripravljenima identičnima raztopinama smo dodali amonij železov (II) sulfat heksahidrat, (NH4)2Fe(SO4)2 • 6 H2O, in natrijev oksalat, Na2C2O4 ter mešali 20 minut. Ti dve raztopini sta bili počasi premešani skupaj z nadaljnjim mešanjem pri sobni temperaturi. Po koncu reakcije smo usedlino železovega oksalata dihidrata, FeC2O4 • 2 H2O, zbirali s centrifugiranjem, sprali z destilirano vodo in etanolom ter končno sušili. Iz dobljenega železovega oksalata dihidrata, smo pripravili maghemit s segrevanjem na temperaturo 400 °C, s hitrostjo 2 K / min v dušikovi atmosferi. Produkte smo karakterizirali z rentgensko praškovno difrakcijo (XRD). Dobili smo želene produkte, vendar so bile ponekod prisotne primesi. Izbrane vzorce smo karakterizirali tudi s transmisijsko elektronsko mikroskopijo.
Keywords:Nanopalčke, železov oksalat dihidrat, surfaktant AOT, centrifuga, rentgenska praškovna analiza (XRD), termogravimetrija, maghemit, transmisijska elektronska mikroskopija.
Place of publishing:Maribor
Publisher:[M. Vučko]
Year of publishing:2009
PID:20.500.12556/DKUM-10061 New window
UDC:54(043.2)
COBISS.SI-ID:16790536 New window
NUK URN:URN:SI:UM:DK:BMZWOBBT
Publication date in DKUM:22.04.2009
Views:4339
Downloads:281
Metadata:XML DC-XML DC-RDF
Categories:FNM
:
Copy citation
  
Average score:(0 votes)
Your score:Voting is allowed only for logged in users.
Share:Bookmark and Share



Hover the mouse pointer over a document title to show the abstract or click on the title to get all document metadata.

Secondary language

Language:English
Title:Synthesis of Maghemite from Iron Oxalate
Abstract:The purpose of this diploma was to research the synthesis of nanorods – like iron oxalate dihydrate, FeC2O4 • 2 H2O, and its transformation in maghemite, γ – Fe2O3, through controlled thermal decomposition. We used anion surfactant AOT, which is important to control the morphologies and sizes of the products. We prepared two identical solutions. AOT was first dissolved in the mixed solvents composed of ethylene glycol, C2H4(OH)2, and distilled water, H2O. The solvents were stirred for 30 minutes. Ammonium iron (II) sulfate heksahydrate, (NH4)2Fe(SO4)2 • 6 H2O, and natrium oxalate, Na2C2O4, were added to prepared identical solutions and stirred for 20 minutes. These two solutions were slowly mixed together with continuous stirring at room temperature. After the reaction completed, the iron oxalate dihydrate, FeC2O4 • 2 H2O, precipitate was collected by centrifuging, washed several times with distilled water and ethanol, and finally dried. From as–prepared FeC2O4 • 2 H2O, we prepared maghemite with heating to temperature 400 °C at a heating rate of 2 K / min under nitrogen atmosphere. We characterized the products by X-ray powder diffraction. We managed to obtain the desired products, however some of the unreacted admixture were found. Some selected samples have been characterised by the transmission electron microscopy.
Keywords:Nanorods, iron oxalate dihydrate, surfactant AOT, centrifuge, X - ray powder diffraction, thermogravimetry, maghemite, transmission electron microscopy (TEM).


Comments

Leave comment

You must log in to leave a comment.

Comments (0)
0 - 0 / 0
 
There are no comments!

Back
Logos of partners University of Maribor University of Ljubljana University of Primorska University of Nova Gorica