Please use this identifier to cite or link to this item: http://scholarbank.nus.edu.sg/handle/10635/13394
Title: Synthesis and characterizations of titania/silica nanoparticles
Authors: LIM YEW VON
Keywords: Titania, Nanoparticles, Phase Transformation, Anatase, Rutile
Issue Date: 19-Jul-2007
Citation: LIM YEW VON (2007-07-19). Synthesis and characterizations of titania/silica nanoparticles. ScholarBank@NUS Repository.
Abstract: Studies on titania nanoparticles and its related materials were extensively driven by its wide-ranged of applications in photocatalyst, photovoltaic cells, solar sensors, optoelectronic devices and etc. However, present studies have not concluded a complete picture on the structural properties, modifications of titania and titania-based materials and a suitable method for mass production. In this presentation, we have presented an inexpensive, high productivity and easy way of producing titania and titania/silica composite nanoparticles with controllable phase compositions, grain sizes and oxygen defects using co-sputtering method. The samples were investigated by Atomic Force Microscopy, Micro-Raman Spectroscopy, Grazing Angle X-ray Diffraction and X-ray Photoelectron Spectroscopy. The mechanism of the crystal growth and phase transition was elucidated in detail by considering the ionic motion of oxygen vacancies with the effect of silicon in titania under the influence of argon annealing. The results show that the titania/silica nanoparticles fabricated are a strong candidate to be utilized as inexpensive yet versatile materials for potential photocatalyst applications.
URI: http://scholarbank.nus.edu.sg/handle/10635/13394
Appears in Collections:Master's Theses (Open)

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Acknowledgements.pdf16.49 kBAdobe PDF

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Summary.pdf20.26 kBAdobe PDF

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TOC.pdf20.62 kBAdobe PDF

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List of figures and tables.pdf99.28 kBAdobe PDF

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Publications.pdf18.36 kBAdobe PDF

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Chapter 1 Introduction.pdf109.23 kBAdobe PDF

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Chapter 2 Photo-induced reactivity and process in Titania.pdf152.36 kBAdobe PDF

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Chapter 3 Fabrications and Topography.pdf2.47 MBAdobe PDF

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Chapter 4 Raman Scattering.pdf562.29 kBAdobe PDF

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Chapter 5 XRD.pdf439.13 kBAdobe PDF

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Chapter 6 XPS.pdf260.87 kBAdobe PDF

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Chapter 7 Summary and Conclusions.pdf19.53 kBAdobe PDF

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Appendices.pdf53.19 kBAdobe PDF

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