Preparation method of graphene/ferriporphyrin/gold nanoparticle composite material

Abstract

The invention discloses a preparation method of a graphene / ferriporphyrin / gold nanoparticle composite material. The preparation method includes the following steps that oxidized graphene is prepared; 5 mL of a 1.0 mg / mL oxidized graphene water solution and 5 mL of 1.5 mg / mL ferriporphyrin turbid liquid are ultrasonically treated for 20 min at normal temperature, and the oxidized graphene water solution and the ferriporphyrin turbid liquid are mixed and then ultrasonically treated for 10 min; 40 microliters of a 0.025 mol / L HAuCl4 solution is added, ultrasonic mixing is conducted for 10 min, a NaOH solution is added dropwise, the pH value is adjusted to be about 10, and mixed liquid is ultrasonically treated for 10 min; the mixed liquid is magnetically stirred in a 90 DEG C water bath, and a condensation backflow reaction is conducted for 3 h; sublayer sediment is acquired centrifugally at the 12,000 r / min rotating speed; residual ferriporphyrin is washed away through tetrahydrofuran, the sublayer sediment is washed away through deionized water, and centrifugal separation is conducted and repeated multiple times till the pH value of supernatant liquid is about 7; a sublayer product is transferred to a small glass bottle and set to certain constant volume through deionized water; whether the reaction is complete or not is confirmed through color distinguishment and instrument analysis, and the required material is prepared after the reaction is complete.

Description

technical field [0001] The invention belongs to the field of preparation of graphene composite materials, in particular to a method for preparing graphene / iron porphyrin / gold nano composite materials. Background technique [0002] Graphene is a planar film composed of carbon atoms in a hexagonal honeycomb lattice with sp2 hybrid orbitals. It has a large π-bond conjugated structure, which makes it have excellent thermal, mechanical and electrochemical properties. Graphene has a large specific surface area and can be fully combined with metals, polymers, and metal organics to prepare nanocomposites with excellent electrical conductivity and stable structure, and the production cost is low. It is very suitable for high-performance composite materials. develop. Porphyrin is a class of biomimetic large π-structure substances with many important enzyme active sites. As an electron mediator with good electrocatalytic properties, it has been widely used in the field of catalytic re...

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Problems solved by technology

[0006] The present invention aims to solve the problems in the prior art that the preparation process is complex, and toxic reagents are used, electrodeposited gold is then added dropwise with graphene / iron porphyrin composite material, which is not suitable for mass production, and it is to prepare a kind of graphene quickly and environmentally friendly. / iron porphyrin / gold nanocomposite

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