A three-dimensional flower-shaped cobalt nanosheet glucose electrochemical sensor and its preparation method

Abstract

The invention discloses a three-dimensional flower-shaped cobalt nano-plate glucose electromechanical sensor and a preparation method thereof. The three-dimensional flower-shaped cobalt nano-plate glucose electromechanical sensor mainly comprises a glassy carbon electrode, a polyaromatic ether ketone-benzimidazole (PAEK-BI) macromoleclar polymer template and a carrier membrane on the surface of the glassy carbon electrode, and a cobalt nano-plate membrane which is loaded on the PAEK-BI macromoleclar polymer template and the carrier membrane and has high electro-catalytic activity and a three-dimensional flower-shaped structure. A method adopted by a prepared three-dimensional flower-shaped cobalt nano-plate modification layer is an in-situ electromechanical reduction deposition method after enriching cobalt ions on the surface of the electrode in advance, and has the advantages of simple operation, controllable conditions and high repetition degree; and the prepared electroactive cobalt nano-material has a flower-shaped nano-plate structure, and flower-shaped nano-plates are uniformly distributed on the surface of the electrode without generating agglomeration and are firmly bonded to the surface of the electrode.

Description

technical field [0001] The invention belongs to the technical field of electroanalytical chemistry, and specifically relates to a three-dimensional flower-shaped cobalt nanosheet glucose electrochemical sensor and a preparation method thereof. Background technique [0002] With the rapid increase in the number of people with diabetes worldwide, electrochemical glucose sensors have always been a research hotspot in the field of electroanalytical chemistry. Glucose electrochemical sensors are roughly divided into two types: enzyme type and non-enzyme type. Enzyme type glucose biosensors are expensive due to the price of biological enzymes, the immobilization process on the electrode surface is complicated, and they are easily inactivated by operating conditions such as temperature and pH. The stability and reproducibility are not high due to various factors, and it is difficult to be widely used due to the uneconomical production cost. Therefore, more and more research work f...

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Problems solved by technology

However, according to the traditional preparation technology of cobalt nanomaterials (such as chemical reduction method) and the modification method on the electrode surface (such as the physical method that the cobalt nanomaterials synthesized directly by chemical methods are adsorbed on the electrode surface, and the non-template electrochemical reduction method) The prepared cobalt nanomaterial electrochemical sensor cannot be repeated due to the complicated preparation process or uncontrollable conditions, or because the cobalt nanomaterial is unevenly distributed on the electrode surface, does not have a three-dimensional network structure, and is easy to agglomerate or fall off. As a result, the sensitivity, reproducibility and stability of the sensor in practical applications are not high, and the accuracy of the results is also poor

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