The Synthesis And Catalytic Properties Characterization Of 0-Dimension And 1-Dimension Noble Metal And Alloy Nanomaterials

Considerable efforts have been devoted to the design and controlled fabrication of noble metal nanomaterials with functional properties. It is well known that the physical and chemical properties of noble metal nanomaterials highly depend on their size and shape, including optical, electrical, magnetic and catalytical properties. Therefore, it is important to develop simple and effective preparation methods for solution-phase synthesis of noble metal nanomaterials with controllable size and shape at low temperature. The main results and conclusions of the dissertation are as follows:(1) Snythesizing monodisperse noble metal and noble metal alloy nanocrystals by solvethermal method, the dispersion of the sample is good in common low polarity organic solvent, and the response is simple and economic, and need no reducing agent and other additives. Through UV absorption spectroscopy, transmission electron microscopy and X-ray diffraction, the size, structure and composition of nanocrystals were characterized;(2) Discuss the formation mechanism of noble metal and noble metal alloy nanocrystals, and study rhodamine 6G molecules covered Ag, AgAu nanocrystals on the substrate surface-enhanced Raman (SERS) spectroscopy, and find out that the effect of surface-enhanced Raman is obvious;(3) Further study the Suzuki catalytic properties assisting with noble metal Pd and PdPt nanocrystals, and show good catalytic activity.