▎ 摘　　要

NOVELTY - Preparing magnetic graphite alkenyl gold nanoparticle composite material, comprises (i) preparing magnetic graphene composite material by solvothermal method: dissolving iron chloride hexahydrate in ethylene glycol to obtain clear yellow solution, adding graphene oxide, dispersing, ultrasonic mixing, adding anhydrous sodium acetate to above solution, magnetic stirring, crystallizing and vacuum drying; (ii) preparing different sizes iron(II, III) oxide nanoparticle modified magnetic graphene composite material; and (iii) preparing magnetic graphite alkenyl gold nanoparticle composite material. USE - The nanoparticle composite material is useful in electrochemical testing field (claimed). ADVANTAGE - The method is simple, environmentally friendly and easy to implement. The composite material has good conductivity, good adsorbability and high electric mobility. DETAILED DESCRIPTION - Preparing magnetic graphite alkenyl gold nanoparticle composite material, comprises (i) preparing magnetic graphene composite material by solvothermal method: dissolving 1 mmol iron chloride hexahydrate in 40 ml ethylene glycol to obtain clear yellow solution, adding 100 mg graphene oxide, dispersing, ultrasonic mixing, adding 5 mmol anhydrous sodium acetate to the above solution, magnetic stirring for 30 minutes, transferring the solution into a stainless steel autoclave, placing in an oven at 200 degrees C, crystallizing for 48 hours, washing the product for three times with 30 ml of ethanol and vacuum drying; (ii) preparing different sizes iron(II, III) oxide nanoparticle modified magnetic graphene composite material by solvothermal method: dissolving 1 mmol iron chloride hexahydrate in a mixed solution of ethylene glycol/diethylene glycol of volume ratio 1:4, 2:1, 1:1 or 4:1, ultrasonic stirring to obtain clear yellow solution, adding 100 mg graphene oxide, ultrasonic dispersing, mixing, adding 5 mmol anhydrous sodium acetate, ultrasonic stirring for 30 minutes, transferring the solution into a stainless steel autoclave, placed in an oven, crystallizing at 200 degrees C for 48 hours, cooling to obtain black fluff material, washing with 30 ml ethanol for three times, magnetic separating, and vacuum drying; and (iii) preparing magnetic graphite alkenyl gold nanoparticle composite material: dissolving iron(II, III) oxidex RGO in water, adding 60 mg sodium citrate, mixing, placing in oil pot bath, reacting at 100 degrees C, stirring and refluxing for 2.5 hours, adding 1 ml of 10% chloroauric acid solution, stirring and refluxing for 30 minutes, washing three times with water, cooling, magnetic separating and vacuum drying at 60 degrees C. An INDEPENDENT CLAIM is also included for use of magnetic graphite alkenyl gold nanoparticle composite material in electrochemical testing field, comprising dissolving gold nanoparticle and different sizes of magnetic graphite alkenyl gold nanoparticle composite material in water to prepare 1 mg/ml solution, ultrasonic processing to obtain a uniform suspension, dropping 20 mu l of the solution into a good polishing glassy carbon electrode surface using micro-injector, drying in the oven, carrying out cyclic voltammogram testing, and analyzing strength of its electrochemical properties of an electrical signal.