Rime-shaped metal-organic framework composite microelectrode, in-situ preparation method and application

Abstract

The invention discloses rime-shaped [Cu(INA)2] metal-organic framework / three-dimensional graphene coated carbon fiber composite microelectrode, an in-situ preparation method and an application. The composite microelectrode comprises three-dimensional graphene coated activated carbon fibers and rime-shaped [Cu(INA)2] metal-organic frameworks on the three-dimensional graphene surface layer, wherein three-dimensional graphene is loose and porous, and the rime-shaped [Cu(INA)2] metal-organic frameworks are uniformly deposited on the three-dimensional graphene surface layer. The preparation method of the composite microelectrode comprises steps as follows: the carbon fibers are subjected to electrochemical activation in mixed acid, graphene and spongy metal copper are sequentially electro-deposited, spongy metal copper is converted into the metal-organic frameworks in situ with an electrochemical anode stripping method. The provided method is simple and convenient to operate and environmentally friendly. The composite microelectrode has lower LOD (limit of detection) and higher detection sensitivity when applied to the field of nano electrochemical sensors, and has very broad application prospects.

Description

technical field [0001] The invention belongs to the field of nanomaterials, specifically a rime-like [Cu(INA) 2 ] In-situ preparation method and application of metal-organic framework / three-dimensional graphene-coated carbon fiber composite microelectrodes. technical background [0002] Carbon fiber is a microcrystalline graphite material obtained by carbonizing and graphitizing organic fibers. Carbon fiber is cheap, small in size, non-toxic, harmless, chemically inert, and has good electrical conductivity, so it is often used in the production of microelectrodes. Compared with pure carbon fibers, graphene-coated carbon fibers with a three-dimensional network structure have better electrical conductivity and better stability, and can be used as excellent carbon fiber microelectrode substrates especially in the field of electrochemical sensors. [0003] Metal-organic framework materials are organic-inorganic hybrid materials with intramolecular pores formed by the self-asse...

AI Technical Summary

Problems solved by technology

Its purpose is to prepare a rime-like [Cu(INA) 2 ] Metal-organic framework / 3D graphene-coated carbon fiber composite microelectrode, thus solving the problem of in-situ synthesis of metal-organic framework materials with uniform size and regular shape in the current metal-organic framework preparation process, and the synthesis method is complex and multi-step, polluting the environment , technical issues such as energy consumption and time

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