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https://ptsldigital.ukm.my/jspui/handle/123456789/500162Full metadata record
| DC Field | Value | Language |
|---|---|---|
| dc.contributor.advisor | Shahidan Radiman, Prof. Dr. | - |
| dc.contributor.author | Lamya Mohammed Ali Al-Qirby (P58679) | - |
| dc.date.accessioned | 2023-10-13T09:39:10Z | - |
| dc.date.available | 2023-10-13T09:39:10Z | - |
| dc.date.issued | 2018 | - |
| dc.identifier.other | ukmvital:108324 | - |
| dc.identifier.uri | https://ptsldigital.ukm.my/jspui/handle/123456789/500162 | - |
| dc.description | Metal oxides have become one of the most attractive nanomaterials for research due to their important properties that enable their wide range of applications in various fields. Developing and improvement of the green, simple, safe and environmental friendly methods to synthesize metal oxides is the main target of many studies. Sonochemical and hydrothermal method are regarded as the easier, safer and most environmental friendly methods to produced nanomaterial. In this study the sonochemical method was improved by using ionic liquid 1-ethyl-3-methylimidazolium tetrafluoroborate [EMIM][BF4] as reaction medium and morphology template. A modified hydrothermal technique was developed to synthesis metal oxides at the water boiling temperature, and a hydrothermal – sonochemical assisted method by combining the modified hydrothermal and the sonochemical method was applied too. These three techniques were used to synthesize three metal oxides namely cobalt oxide (Co3O4), cupric oxide (CuO) and zinc oxide (ZnO). Each method produced different yields of each metal oxide successfully with different properties, sizes and morphologies including nanoflowers, nanorods, nanosheets, nanodisks, nanoflakes, microtetrapods, microtwines, microrods and others. Many complementary experiments have been carried out to investigate some factors such as pH, types of precursors and others. The prepared samples of metal oxides have been investigated by different characterization techniques such as X-ray diffraction (XRD), Energy-dispersive X-ray spectroscopy (EDAX), Fourier transform infrared (FT-IR) , FE- SEM Field Emission Scanning Electron Microscopy (FE-SEM) , Transmission Electron Microscopy (TEM) and Ultraviolet-visible (UV-vis) spectrophotometer. The sonochemical process using the ionic liquid [EMIM][BF4] has been used to synthesis different morphologies of cobalt oxide Co3O4 nanoflakes and nanorods. Different sonication time periods and different molar ratios of the ionic liquid (IL) were used to investigate their effects on the morphologies, optical, chemical and magnetic properties of the produced Co3O4 nanoparticles. The produced CuO and ZnO nanostructures by this method showed nanosheet and bunch of grapes shape respectively. The modified hydrothermal technique produced hexagonal mesoporous nanodisks of Co3O4 which change to very thin transparent hexagonal nanoflakes with very small pores due to the influence of the ionic liquid. CuO nanostructures produced by the modified hydrothermal technique showed dandelion flowers like, poker flowers like, and hollow center corn shape like when the reaction time was 15min, 60min, and NaOH was added, respectively. ZnO nanostructure and microstructure produced by this method gave nanowalnut, microrods, microtwin, nanoflower and other morphologies. In conclusion, the hydrothermal– sonochemical assisted method has produce different morphologies and nanostructure of Co3O4, CuO and ZnO., 'Certification of Master's/Doctoral Thesis' is not available,Ph.D. | - |
| dc.language.iso | eng | - |
| dc.publisher | UKM, Bangi | - |
| dc.relation | Faculty of Science and Technology / Fakulti Sains dan Teknologi | - |
| dc.rights | UKM | - |
| dc.subject | Metallic oxides | - |
| dc.subject | Universiti Kebangsaan Malaysia -- Dissertations | - |
| dc.subject | Dissertations, Academic -- Malaysia | - |
| dc.title | Synthesis and characterization of metal oxides (Co3O4, CuO and ZnO) nano and micro structures via combined hydrothermal and ultrasonification in ionic liquids | - |
| dc.type | Theses | - |
| dc.format.pages | 296 | - |
| dc.identifier.callno | QD181.O1A437 2018 tesis | - |
| dc.identifier.barcode | 003878(2019) | - |
| Appears in Collections: | Faculty of Science and Technology / Fakulti Sains dan Teknologi | |
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| File | Description | Size | Format | |
|---|---|---|---|---|
| ukmvital_108324+SOURCE1+SOURCE1.0.PDF Restricted Access | 1.61 MB | Adobe PDF |  View/Open |
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