Development of novel heteronanostructures engineered for electrochemical energy conversion devices

Amani Hamedani, Hoda

Title:

Development of novel heteronanostructures engineered for electrochemical energy conversion devices

dc.contributor.advisor	Garmestani, Hamid
dc.contributor.author	Amani Hamedani, Hoda
dc.contributor.committeeMember	Liu, Meilin
dc.contributor.committeeMember	Ahzi, Said
dc.contributor.committeeMember	Sandhage, Kenneth H.
dc.contributor.committeeMember	Alamgir, Faisal M.
dc.contributor.committeeMember	Jacob, Karl I.
dc.contributor.committeeMember	Khaleel, Mohammad A.
dc.contributor.department	Materials Science and Engineering
dc.date.accessioned	2014-08-27T13:31:38Z
dc.date.available	2014-08-28T05:30:05Z
dc.date.created	2013-08
dc.date.issued	2013-05-15
dc.date.submitted	August 2013
dc.date.updated	2014-08-27T13:31:38Z
dc.description.abstract	Heterogeneous nanostructures such as coaxial nanotubes, nanowires and nanorods have been of growing interest due to their potential for high energy-conversion efficiencies and charge/discharge rates in solar cell, energy storage and fuel cell applications. Their superior properties at nanoscale as well as their high surface area, fast charge transport along large interfacial contact areas, and short charge diffusion lengths have made them attractive components for next generation high efficiency energy-conversion devices. The primary focus of this work was to understand the doping mechanism of TiO2 nanotube exclusively with strontium as an alkaline earth metal to shine light on the relation between the observed enhancement in photocatalytic properties of doped TiO2 nanotubes and its structural and electronic characteristics. The mechanism of Sr incorporation into the TiO2 nanotube structure with the hypothesis of possibility of phase segregation has been explored in low concentrations as a dopant and in very high concentrations by processing of SrTiO3 nanotube arrays. Detailed experimental examination of the bulk and surface of the Sr-doped nanotubes has been performed to understand the effect of dopant on electronic structure and optical properties of the TiO2 nanotubes. Moreover, in order to minimize the polarizations associated with the ionic/electronic charge transport in the electrolyte and anode of solid oxide fuel cells (SOFCs), a new platform is developed using vertically oriented metal oxide nanotube arrays. This novel platform, which is made of coaxial oxide nanotubes on silicon substrates, has the potential to simultaneously lower the operating temperature and production cost leading to significant enhancement in the performance of micro-SOFCs.
dc.description.degree	Ph.D.
dc.embargo.terms	2014-08-01
dc.format.mimetype	application/pdf
dc.identifier.uri	http://hdl.handle.net/1853/52158
dc.language.iso	en_US
dc.publisher	Georgia Institute of Technology
dc.subject	TiO2 nanotubes
dc.subject	Doping
dc.subject	SrTiO3
dc.subject	Solid oxide fuel cells
dc.title	Development of novel heteronanostructures engineered for electrochemical energy conversion devices
dc.type	Text
dc.type.genre	Dissertation
dspace.entity.type	Publication
local.contributor.advisor	Garmestani, Hamid
local.contributor.corporatename	School of Materials Science and Engineering
local.contributor.corporatename	College of Engineering
relation.isAdvisorOfPublication	6afb9e40-a9c5-433b-9a9d-d22d9cd546ed
relation.isOrgUnitOfPublication	21b5a45b-0b8a-4b69-a36b-6556f8426a35
relation.isOrgUnitOfPublication	7c022d60-21d5-497c-b552-95e489a06569
thesis.degree.level	Doctoral