Preparation Of Metalalloy Nanofibers With Hen Egg White Lysozyme Fibrils As Biotemplate And Their Electrocatalitic Properties

In this article,we mainly research the synthesis of metal nanoparticle chains using HEWL fiber as biotemplate,using the NaBH4 as a reducing agent,including rhodium nickel alloy nanofibers and Palladium copper alloy nanofibers.The experimental samples were characterized by different methods.Finally,we find the optimum reaction conditions,including the ratio of precursor salt solution,concentration,incubation time,concentration of reducing agent.Through characterization methods of TEM,HRTEM,UV,EDS,SAED,XRD and CV,we analyzed the crystal structure,appearance,particle size,composition,chemical and physical properties of nano particles.The details and results are summarized as follows:1.The morphologies of HEWL and HEWL fibrils were characterized by TEM.Explored the optimal conditions of preparation of rhodium nickel bimetallic nanofibers through control-experiments.Lysozyme fibrosis at 70℃ in the metal bath,the proportion of the chemical system was 1:1,the chemical system was 180μL,and 20 mM NaBH4 was used as the reducer.The morphology of rhodium nickel bimetallic nanofibers is more uniform.The particle size is about 2nm,the diameter of the fiber is about 20 nm,and the length is up to 10μm.Compared with the commercial Pt/C catalyst,the rhodium nickel bimetallic nanofibers exhibited better redox properties.2.Explored the optimal conditions of preparation of Palladium copper alloy nanofibers through control-experiments.It was found that the best morphology of Palladium copper alloy nanofibers was obtained by adding 180μL mixed solution of palladium chloride and copper acetate.The ratio of mixed solution of palladium chloride and copper acetate was 1:1.Incubation time was 16 h.The reducer is 20 mM NaBH4.Palladium copper alloy nanofibers is about 30 nm,the fiber length is 20 nm,and the particle size is about 3nm.Compared with commercial Pd/C catalyst,the Palladium copper alloy nanofibers exhibited higher catalytic oxidation activity.