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Fabrication, Characterization and Environmental Impacts of Multifunctional Nanomaterials for Energy Conversion

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dc.contributor.author Peng, Xiaohui en_US
dc.contributor.other Department of Chemistry en_US
dc.date.accessioned 2012-05-17T12:21:50Z
dc.date.available 2012-05-17T12:21:50Z
dc.date.issued 1-Aug-11 en_US
dc.date.submitted Aug-11 en_US
dc.identifier Peng_grad.sunysb_0771E_10649.pdf en_US
dc.identifier.uri http://hdl.handle.net/1951/56089
dc.description.abstract Solar energy has been considered to be an alternative energy source to meet the exponential demand for renewable energy. To date, the use of nanomaterials has provided alternative and promising ways to improve solar device performance. In particular, nanoscale heterostructures hold great promise in the improvement of energy conversion efficiency, due to their advantages of possessing diverse functionalities in a single structure and their unique properties arising from strong interfacial interaction. Moreover, the safety risk associated with nanomaterials needs to be comprehensively assessed prior to their widespread use. In this dissertation, we have attempted to develop facile and reliable routes to two different categories of nanoscale heterostructures, namely (a) zero-dimensional (0D) - one-dimensional (1D) heterostructures and (b) 1D coaxial heterostructures, and to study their intriguing properties in applications associated with the energy conversion process. Specifically, the first part of the dissertation, including Chapter 2 and 3, will demonstrate the rational design of heterostructures consisting of carbon nanotubes and one or more types of nanocrystals, with precise control over the location and coverage of nanocrystals on the nanotube surface. The investigation of their photophysical properties reveals insight into the dynamics of charge carriers in the heterostructures. Moreover, the fabrication of SnO<sub>2</sub>/TiO<sub>2</sub> 1D radial heterostructures by coaxial electrospinning technique will be discussed as an example of creating discrete multifunctional 1D heterostructures. The applicability of such inorganic radial heterostructures in energy conversion applications is manifested by their photocatalytic activity in the degradation of organic dyes (Chapter 4). Finally, the morphology effect upon the toxicity of ZnO nanostructures towards marine diatoms has been studied, revealing the impact of nanomaterials on the environment (Chapter 5). Overall, these studies have provided valuable insight into the fabrication and utilization of nanostructures to resolve problems with global significance as well as to provide useful implications for evaluating the potential environmental risks of nanomaterials during the course of their life cycle. en_US
dc.description.sponsorship Stony Brook University Libraries. SBU Graduate School in Department of Chemistry. Lawrence Martin (Dean of Graduate School). en_US
dc.format Electronic Resource en_US
dc.language.iso en_US en_US
dc.publisher The Graduate School, Stony Brook University: Stony Brook, NY. en_US
dc.subject.lcsh Chemistry en_US
dc.subject.other energy conversion, nanomaterials en_US
dc.title Fabrication, Characterization and Environmental Impacts of Multifunctional Nanomaterials for Energy Conversion en_US
dc.type Dissertation en_US
dc.description.advisor Advisor(s): Stanislaus S. Wong. John Parise. Committee Member(s): Joseph W. Lauher; Michael Dudley. en_US
dc.mimetype Application/PDF en_US

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