Physical and chemical properties of functionalized titanate nanostructures

Plodinec, Milivoj (2014) Physical and chemical properties of functionalized titanate nanostructures. Doctoral thesis, Faculty of Science > Department of Physics.

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Abstract

Titanate nanostructure (nanotubes, nanocrystals, nanowires) show a unique combination of physical and chemical properties, such as high specific surface area, a large aspect ratio, possibility of intercalation and ion exchange, proton conductivity and photocatalytic activity. The aim of the dissertation is to investigate the properties of titanate nanostructures and functionalize them for potential applications in photocatalysis, as strengthen in the composite polymers, and to obtain ferroelectric nanostructures. To achieve desired properties of nanostructures, it is crucial to determine the structure, temperature and mechanochemical stability and optimize the synthesis. For the application in photocatalysis, titanate nanotubes surface were decorated by silver nanoparticles and annealed in hydrogen atmosphere. The temperature stability and the strength of silanized titanate nanotubes were studied to improve their application in polymer composites. For the synthesis of nanostructured BaTiO3, titanate nanostructures were used as a precursor. The obtained results showed limitation of mechanochemical stability for titanate nanostructures, the influence of functionalization and modification of titanate nanostructures to their structural, chemical and physical properties. Properties as the Sun light absorption and ferroelectricity of barium titanate was studied. Determination and improvement of mentioned properties is of main importance for possible application of nanostructures for degradation of waste water, in solar cells, for increase of strength and thermal resistivity of polymers and possible application of photoconductive BTO-TiO2 heterostructures for holographic memories.

Item Type: Thesis (Doctoral thesis)
Keywords: titanate nanostructures, functionalization, temperature stability, phase transition, photochatalysis, photoconductivity
Supervisor: Gajović, Andreja
Date: 17 October 2014
Number of Pages: 178
Subjects: NATURAL SCIENCES > Physics
Divisions: Faculty of Science > Department of Physics
Depositing User: Gordana Stubičan Ladešić
Date Deposited: 28 Nov 2014 12:19
Last Modified: 28 Nov 2014 12:19
URI: http://digre.pmf.unizg.hr/id/eprint/3401

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