The Etching, Assembly Of Graphene And Their Catalytic Performance And Flexible Application

In recent years,graphene has attracted great interest,and its unique surface structure and excellent electronic properties are favored by researchers.There have been various studies on catalysis,structure and application.Especially after the modification of graphene,the honeycomb six-membered ring which does not originally contain any unstable bond is not inert,and the surface contains various functional groups or Heteroatoms,which exhibit superior electrical conductivity and activity.Here,we modulated the molecular structure,electronic properties and chemical properties of graphene,studied the structure of the catalytic hydrogenation of p-nitrophenol and the enzymatic activity and assembly of graphene,and the flexible sensor synthesized by the thermal reduction of RGO as a conductive film.The details are as follows:(1)Novel N-doped reduced graphene oxide(N-RGO)meshes are facile fabricatedby selective etching of 3–5 nm nanopores,with controllable doping of N dopants at an ultrahigh N/C ratio up to 15.6 at% via one-pot hydrothermal reaction.The N-doping components were controlled at ultra-high concentration and tunable structure.The intrinsic catalytic activity of non-metal catalysts,the evolution mechanism of micro-morphology and structure,and the formation mechanism of etching were revealed.This thesis revealed the reason for new catalytic activities,including significantly improved catalytic performance,catalytic steady-state kinetics,cycling,and continuous continuous reactions.(2)Assembled graphene were prepared and the effects of pre-freezing temperature,nitrogen doping concentration and reaction time conditions were investigated.The main reason for inducing the assembly of graphene to form the structure of the alignment tape along the vessel wall is summarized.The conclusion that the assembled structure has non-metal catalytic activity and the superiority of being a catalyst carrier is proved.(3)A preliminary test of graphene electrical properties and flexible bending on wood pulp paper and PVC,followed by the use of electrospun cellulose acetate nanofibers as a substrate,a flexible sensor was prepared using thermally reduced RGO as a conductive film.Raman spectroscopy,contact angle testing and stress-strain testing were performed on different samples of oriented and non-oriented mats.It was found that oriented mats are more suitable as substrates.The influence of the square resistance of different hot-pressing temperature and hot-pressing time was explored.The use of capillary action to enhance the binding of RGO to the substrate and the bending and twisting experiments,performing under simulated arm bending and wrist twisting conditions,revealed that the conductivity was sensitive to changes.