Synthesis and characterization of mesoporous cadmium titanate thin films

Simple item page
buir.advisorDağ, Ömer
dc.contributor.authorÖzkök, Zeynep
dc.date.accessioned2018-01-25T13:12:25Z
dc.date.available2018-01-25T13:12:25Z
dc.date.copyright2018-01
dc.date.issued2018-01
dc.date.submitted2018-01-25
dc.descriptionCataloged from PDF version of article.en_US
dc.descriptionThesis (M.S.): Bilkent University, Department of Chemistry, İhsan Doğramacı Bilkent University, 2018.en_US
dc.descriptionIncludes bibliographical references (leaves 63-67).en_US
dc.description.abstractThis thesis work focuses on the synthesis and characterization of mesoporous CdTiO3 thin films by using a salt-surfactant assembly, which is defined as molten salt assisted self-assembly (MASA) method. The MASA method is a proper process to fabricate mesoporous transparent thin films. The characterization of the calcined powder and fresh gel samples was made by using XRD, SEM, TEM, ATR-IR, N2 sorption and POM techniques. The preparation of a clear solution containing ethanol as solvent, [Cd(H2O)4](NO3)2, two different surfactants ((C16H33N(CH3)3)Br and EO20PO70EO20), titanium(IV)butoxide (Ti(OC4H9)4) as titania source and concentrated HNO3 as acid to prevent quick polymerization of titanium alkoxide is the first step for the synthesis of the desired material. The prepared clear solution is coated on the glass substrates to form a liquid crystalline mesophase by the hydrolyzed titania species and the molten salt by the guidance of surfactant domains. Upon the calcination of the fresh gel samples, mesoporous CdTiO3 material is formed. In scope of this thesis work, several parameters were changed to determine the optimum the salt uptake, acid amount, surfactant ratio, coating method and calcination path for the synthesis. Among dip coating, spin coating and drop casting methods, dip coating method gave better results to produce a material with less side products, which was mainly CdO. The amount of HNO3 added to the solution affects the homogeneity and stability of the prepared fresh films. Although changing the amount of HNO3 did not affect the surface area significantly, it was observed that addition of excess amount of acid resulted in an uneven surface on calcined films. CdTiO3 is nanocrystalline at 350oC and stable up to 550oC. The initial calcination temperature is an important parameter to synthesize a material with less side product. Mesoporous CdTiO3 displays 44 to 79 m2/g surface area and pore volume of 0.11 to 0.18 cm3/g depending on the synthesis conditions.en_US
dc.description.provenanceSubmitted by Betül Özen (ozen@bilkent.edu.tr) on 2018-01-25T13:12:25Z No. of bitstreams: 1 Tez Zeynep Özkök.pdf: 6793512 bytes, checksum: 24822d10b226889b56979d2b0444c026 (MD5)en
dc.description.provenanceMade available in DSpace on 2018-01-25T13:12:25Z (GMT). No. of bitstreams: 1 Tez Zeynep Özkök.pdf: 6793512 bytes, checksum: 24822d10b226889b56979d2b0444c026 (MD5) Previous issue date: 2018-01en
dc.description.statementofresponsibilityby Zeynep Özkök.en_US
dc.embargo.release2021-01-17
dc.format.extentxi, 67 leaves : charts (some color) ; 30 cmen_US
dc.identifier.itemidB156835
dc.identifier.urihttp://hdl.handle.net/11693/35748
dc.language.isoEnglishen_US
dc.rightsinfo:eu-repo/semantics/openAccessen_US
dc.subjectMesoporous thin filmsen_US
dc.subjectCdTiO3en_US
dc.subjectMolten Salt Assisted Self-Assembly (MASAen_US
dc.titleSynthesis and characterization of mesoporous cadmium titanate thin filmsen_US
dc.title.alternativeMezogözenekli CdTiO3 ince filmlerin sentezi ve karakterizasyonuen_US
dc.typeThesisen_US
thesis.degree.disciplineChemistry
thesis.degree.grantorBilkent University
thesis.degree.levelMaster's
thesis.degree.nameMS (Master of Science)

Files

Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
Tez Zeynep Özkök.pdf
Size:
6.48 MB
Format:
Adobe Portable Document Format
Description:
Full printable version
Download
License bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
license.txt
Size:
1.71 KB
Format:
Item-specific license agreed upon to submission
Description:
Download

Collections

Graduate School of Engineering and Science