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Pt, Au, Cu_2O Nanomaterials , analysis and applied research

Author: DuYongLing
Tutor: WangChunMing
School: Lanzhou University
Course: Analytical Chemistry
Keywords: Monolayer UPD Characterization of Pt Nanoparticles Porous material Ag nanowires Cu2O
CLC: TB383.1
Type: PhD thesis
Year: 2009
Downloads: 672
Quote: 1
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Abstract


The dissertation on the basis of previous studies, a new method for preparing a metal layer prepared by modification of high Pt catalyst, high porous Au nano-materials and new cuprous oxide n-type nano-materials, and scan electron microscopy (SEM), transmission electron microscopy (TEM) to study the morphology of the structure. With the X-Ray powder diffraction and X-ray photoelectron spectroscopy measured lattice structure and elements. Electrochemical method for the preparation of nanomaterials and optical properties of electro-catalytic activity, and in fuel cells and environmental pollutants processing research. 1. In the presence of chloroplatinic acid and copper ion solution, using cyclic voltammetry deposition of platinum nanoparticles deposited on the conductive glass surfaces. As the co-deposition of copper ions, prepared highly dispersed Pt nanoparticles, and use Ru, Bi layer of Pt nanoparticles modified, the results confirm the modified nanoparticles and nanoparticles layer has a high catalytic activity and the ability to stabilize After UPD-modified Pt nanoparticles may fuel cells with high potential applications. 2. Using polystyrene as a template prepared by electrodeposition of highly dispersed platinum-dimensional platinum nanoparticles. By cyclic voltammetry and instant current research platinum nanoparticles and Sn Modified Platinum Nanoparticles electrochemical performance. The results showed that after the Sn-upd modification of Pt nanoparticles on the catalytic oxidation of methanol with high catalytic performance, can be used for direct methanol fuel cell anode catalyst. 3. Self-assembly on the ITO electrode as the template polystyrene lactoglobulin, electrodeposition producing highly ordered porous Pt. With UPD copper monolayer deposited on a porous Pt electrode surface, and then Pd 2 through the displacement reaction will be deposited in a single layer on a porous Pt electrode replaced copper monolayer Pd. The results showed that Pd Modified Pt macroporous materials for O 2 play a significant enhancement of the catalytic effect, but Pd Modified Pt macroporous materials play a catalyst for methanol inhibition. 4. Ag nanowires as templates to prepare highly ordered porous Au nanomaterials. With Ag nanowires as a template, HAuCl 3 reaction with Ag nanowires were successfully prepared highly ordered porous Au nanomaterials. Studied by laser Raman scattering of Rhodamine gold porous nanomaterials Raman enhancement effect, the findings indicate that the Au nano-porous material is a good laser Raman enhancement effect of nanomaterials. 5. New hydrothermal reaction of n-type cuprous oxide nanomaterials with methylene blue and carbendazim research cuprous oxide photocatalytic properties. The results show the new prepared n-type semiconductor material of organic pollutants cuprous oxide has a strong photocatalytic degradation.

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