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Title: Synthesis of Nanomaterials for Optical and Catalytic Studies
Authors: TAN ZHI YI
Keywords: Nanomaterials, Nanocomposite, Photocatalytic, Copper, Zinc Oxide
Issue Date: 16-Aug-2013
Source: TAN ZHI YI (2013-08-16). Synthesis of Nanomaterials for Optical and Catalytic Studies. ScholarBank@NUS Repository.
Abstract: The research presented in this thesis is focused on developing wet chemical synthesis methods for nanomaterials. Synthesis methodology using cuprous oxide as the Cu source was developed to prepare metallic copper nanoparticles NPs with sizes that can be tuned. Copper particles with sizes ranging from 46 to 90 nm were synthesized and a clear correlation with plasmon absorption was obtained. In order to study the application and extend the usability of the copper particles, further modification of the synthesis was carried out to deposit them on zinc oxide host. Interesting observations such as the shifts in plasmon resonance as well as relative attenuation of ZnO absorption were detected, demonstrating possible electronic interaction between the coupled materials. The plasmon peak of the metallic copper was also found to vary when the deposition process take place in different solvent system, namely triethylene glycol or diethylene glycol. Lastly, catalysis studies of ethanol steam reforming were performed using the Cu/ZnO composites prepared. The applicability of nanomaterials in photocatalytic applications also propels the investigation on nanoimprint lithography (NIL) to design a photocatalytic reactor.
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