Preparation and electrochemical sensing application research of tin dioxide-three-dimensional graphene nanocomposite immobilized protein modified electrode

A nanocomposite material and protein modification technology, which is applied in the direction of material electrochemical variables, material analysis, material analysis by electromagnetic means, etc., can solve the difficult problems of direct electrochemistry, shedding or denaturation, and achieve low preparation cost and detection The effect of low limit and wide detection range
CN107941889APending Publication Date: 2018-04-20HAINAN NORMAL UNIVERSITY
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
HAINAN NORMAL UNIVERSITY
Publication Date
2018-04-20

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Abstract

The invention discloses preparation and electrochemical sensing application research of a tin dioxide-three-dimensional graphene (SnO2-3DGR) nanocomposite immobilized protein modified electrode, and belongs to the technical field of biosensors. A method provided by the invention comprises the following steps: preparing a SnO2-3DGR nanometer material, dispensing the SnO2-3DGR nanometer material onto the surface of a carbon ionic liquid electrode (CILE), then dispensing myoglobin (Mb) onto the SnO2-3DGR modified CILE surface, naturally airing, dropwise adding a chitosan (CTS) solution, and drying a third-generation electrochemical enzyme sensor. The prepared sensor has the characteristics of a simple process, convenient operation, low cost, high detection sensitivity, strong electrical signal and simple electrode pretreatment, and can be used for detecting organic small molecular trichloroacetic acid (TCA), with a detection limit of 1.67 mmol / L.
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Description

technical field

[0001] The invention relates to a SnO2-3DGR nano composite material immobilized protein modified ionic liquid carbon paste electrode; the invention also relates to a preparation method of the modified electrode and its application in electrochemical sensing and detection. Background technique

[0002] Carbon paste electrode is a kind of carbon electrode made by mixing conductive graphite powder and hydrophobic binder into a paste, and then filling it in the electrode tube. It has the advantages of simple preparation, low price and good selectivity. , high sensitivity, wide potential application range and easy surface renewal. Room temperature ionic liquids refer to liquid substances composed entirely of anions and cations at room temperature and nearby temperatures, which have the advantages of wide electrochemical window, high conductivity, good thermal and chemical stability, etc. Ionic liquid is used as a hydrophobic binder and graphite powder to prepare ...

Claims

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