Preparation And Catalytic Performance Research On Palladium Nanoparticles/Carbon Nanocomposite

Carbon nanomaterial refers to a kind of nanomaterial whose particles dispersed in a scale range of 1¹00 nm.The composition of dispersed phase can contains carbon atoms,some doping of carbon atoms or pore shape.Carbon nanomaterial has some extraordinary qualities: high thermal stability and excellent structure properties,electrical properties,mechanical propertiesin.In addition,it has high electric catalytic activity for many chemical reactions.Therefore,carbon nanomaterials become the ideal supporting material.This paper combine amination fullerenes,cryptophane-A,nitrogen-doped graphene quantum dots and palladium nanoparticles respectively to get new materials.Then the new material is analyzed by corresponding characterization and used in catalytic and electrochemical detection.The first chapter: introduces the development,preparation methods,characterization technique,applications in many aspects of carbon nanomaterial and palladium nanoparticles.And this chapter introduces the background of this paper,the main research contents and innovation points briefly.The second chapter: the fullerene(C₆₀)is functionalized to get amination fullerenes(C₆₀-NH₂).Then combines C₆₀-NH₂ and palladium nanoparticles to get a new material of amination fullerenes@palladium nanomaterials by liquid phase reduction method.The material is analyzed by corresponding characterization.Finally the material is used in 4-nitrophenol catalytic reduction,and record a Uv-Vis spectrum every 0.5 min interval.The experimental results show that C₆₀-NH₂@Pd shows good catalytic effect.The third chapter: the C₆₀-NH₂@Pd nanocomposite is used for the electrochemical detection of nitrite,and their catalytic properties towards nitrite were studied.The experiment results show that the C₆₀-NH₂@Pd modified GC electrode can be used to determine nitrite concentration in a linear range of 0¹0 mM.And the linear equation of nitrite response is: y =0.021+0.191 x,R2 = 0.994.The fourth chapter: the C₆₀-NH₂@Pd nanocomposite is used for the electrochemical catalytic of nitrite hydrogen peroxide and oxygen.And the optimal conditions and electrochemical performance are explored.The experiment lay some theoretical basis for building the sensors of hydrogen peroxide and oxygen.The fifth chapter: use a simple three-step synthesis to synthesize a supramolecular: cryptophane-A（CA）.Then combines CA and palladium nanoparticles to get a new material of CA palladium nanocomposite by electrochemical deposition method.With the synergistic effect of palladium nanoparticles and CA supramolecular,the nanocomposites obtain higher electrochemical surface area.Finally the material is used in electrochemical catalytic alcohols.Chapter 6: report a facile one-pot hydrothermal approach to prepare a novel nitrogen-doped graphene quantum dots（N-GQDs）supported Palladuim nanocomposites.The the material is used for the methanol electrocatalytic oxidation reaction.The results show that the Pd@N-GQDs nanocomposite possess high catalytic activity and stability.