Synthesis Of Platinum Nanopeanuts And Study Of The Optical Properties Of The Gold Nanoparticle Dimer

The platinum nanomaterials have many functional properties and important application,and it has great research value in many fields.The platinum nanomaterials have excellent catalytic performance,and its high catalytic activity makes it have the capital position in industrial catalysis field,and it is attracting more and more attention.In the first part of this paper,the main content is that we select the platinum nanomaterials as the research object,design the experimental conditions,which are mild,simple,fast and easy synthetic route to obtain the new nanostructure.And we explore its growing pattern to provide some experimental accumulation for further research and application in the future.Because the platinum as a catalyst,through its electrochemical properties of the study,to study its catalytic properties.Around the above two points,we study the following work:(1)The platinum nanopeanuts are synthesized by polyol reduction method for the first time,we select the hexachloroplatinic acid hexahydrate as the platinum source and the ferric chloride as reducing agent.The morphology of platinum nanopeanuts is studied by field emission scanning electron microscopy,energy dispersive spectrometer and X ray diffractometer.And the effects of reaction parameters,such as temperature,concentration of ferric chloride and hexachloroplatinic acid are slso studied.(2)In order to obtain the practical application of the novel platinum nanopeanuts,the electrocatalytic activity of platinum nanopeanuts is tested by electrochemical measurement by using the three electrode system of electrochemical workstation.This method is fast,simple,and green.The test of hydrogen evolution reaction shows that the prepared platinum nanopeanuts have potential applications in electrochemical catalysis.In this paper,we study another precions metal materials material,which is gold that is one of the most stable chemical elements in nature.The gold nanomaterials are widely concerned in the nanotechnology field,because of its surface plasmon polariton properties.The second part of this paper of the main content is selecting the gold nanomaterials as a research object,the specific content is as follows:(3)We use the polyol reduction method as the synthetic route,to use tetrahydrate chloroauric acid as gold source,polyDADMAC as reducing agent,phosphoric acid as additive.The gold nanoparticles are synthesized by heating reduction in the system.(4)The morphology of gold nanoparticles is studied by field emission scanning electron microscopy.And we study the polarization dependence of surface enhanced raman scattering in gold nanoparticles and gold film system.In this paper,the laser with a wavelength of 633 nm was vertically irradiated onto the system.The molecular signal was enhanced by 633 nm wavelength laser irradiation.Based on the theoretical calculation,the electric field of 532 nm,633nm and 785 nm wavelengths is calculated with the change of polarized light.