| Summary: | 碩士 === 逢甲大學 === 材料科學與工程學系 === 106 === There are two subjects in this thesis, which are the synthesis and applications of copper oxide nano-heterostructures and copper/molybdenum disulfide nano-heterostructures for surface-enhanced Raman scattering and photocatalytic degradation or photocatalytic hydrogen production, respectively.
First, in this study, copper oxide nanowires have been fabricated by thermal oxidation method on copper substrate. This method has many advantages, such as low temperature, less cost, large-scale growth, no need of catalyst and template, and environmental friendliness. The surface hydrophilicity of copper oxide nanowires can be increased by bonding (3-Aminopropyl)-trimethoxysilane. After then, we used wet chemical method to coat carbon and replace silver nanoparticles on copper oxide nanowire under the different concentration of reaction precursors for evaluating the effect of surface-enhanced Raman scattering spectroscopy. Finally, the optimal condition of the copper oxide nano-heterostructures were further applied to the detection of medical antibiotic amoxicillin and chemotherapy drug 5- Fluorouracil. The copper oxide nano-heterostructures provide simplicity, high enhancement, low detection limit, and low cost fabrication, which shall be of significant value for practical applications of other SERS sensing systems.
Second, copper/molybdenum disulfide nano-heterostructures have been synthesized by hydrothermal method, which exhibited the advantages of not requiring high-temperature sintering, good crystallinity, high purity, low cost, and low environmental impact. The copper nanowires can be uniformly dispersed in tetrahydrofuran, which is beneficial to mix with different concentration of molybdenum disulfide precursor for the growth of copper/molybdenum disulfide nano-heterostructures. The photocatalytic activities of the different concentration of molybdenum disulfide reaction precursors were evaluated in the photocatalytic degradation of rhodamine 6G and hydrogen production under visible light irradiation. The copper/molybdenum disulfide nano-heterostructures revealed much higher photodegradation and hydrogen production efficiency than commercial TiO2 nanopowders. The copper/molybdenum disulfide nano-heterostructures can be used in solar energy conversion, water splitting, and other related applications.
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