| Summary: | 碩士 === 國立臺灣科技大學 === 材料科學與工程系 === 106 === Zinc oxide nanoparticles (ZnO NPs) were successfully synthesized by hydro thermal
methods and then annealing at varied temperature (200, 300, 400, 500, 600 and 700oC).
Furthermore, gold nanoparticles (Au NPs) were immobilized on the dimercaptosuccinic acid
(DMSA) modified ZnO NPs (Au-ZnO NPs) for the photodegradation and surface enhanced Raman
scattering (SERS) detection of the water pollutants, such as methylene blue. The effects of the
particle size of ZnO NPs at varied annealing temperatures were investigated. The morphology of
ZnO NPs and Au NPs were evaluated by scanning electron microscopy (SEM) and transmission
electron microscopy (TEM). It showed that ZnO NPs were spherical in shape with the diameter
about 50 nm and Au NPs were spherical in shape with diameter about 10 nm. The optical properties
of the ZnO NPs were characterized by UV-visible spectroscopy. XRD results revealed that the
ZnO NPs are highly crystalline, showing the hexagonal wurtzite crystal structure. Au-ZnO NPs
displays great characterizations in the photodegradation and SERS detection, which is potential to
apply in the field of biomedical and water treatments and rapid detection.
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