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Preparation method and application of palladium nanomaterial used as non-enzymatic glucose sensor

A technology of glucose sensor and palladium nanometer, which is applied in the fields of analyzing materials, electrochemical variables of materials, material analysis by electromagnetic means, etc., can solve the problem of inability to accurately measure the concentration of glucose, and achieve the purpose of improving sensitivity and selectivity, and eliminating interfering substances. effect, high catalytic activity

Inactive Publication Date: 2013-05-15
YANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, because the electrochemical reaction speed of interfering substances is very fast, and the method of usually checking the glucose concentration is the i-t detection method, this will inevitably lead to the defect that the glucose concentration cannot be accurately measured.

Method used

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  • Preparation method and application of palladium nanomaterial used as non-enzymatic glucose sensor
  • Preparation method and application of palladium nanomaterial used as non-enzymatic glucose sensor
  • Preparation method and application of palladium nanomaterial used as non-enzymatic glucose sensor

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] (1) Pretreatment of matrix glassy carbon electrode: Polish with 0.05μm alumina powder, rinse the polished electrode with deionized water to remove dirt, and then pass through 2mol / L sodium hydroxide, analytical grade ethanol, 2mol / L hydrochloric acid and secondary water ultrasonic cleaning;

[0021] (2) Preparation of PS template: Drop-coat 5 μL of PS bead aqueous solution (uniformly ultrasonicated) on the pretreated glassy carbon electrode, place it in the dark at room temperature for 24 hours, and then put it in a vacuum oven at 70°C for one hour ; In this process, the PS spheres are freely assembled, and a large PS template with a network structure with layers of pores is formed on the surface of the pretreated glassy carbon electrode, which is conducive to the electrochemical deposition of the palladium particles in the third step.

[0022] (3) Preparation of palladium nanomaterials: the electrode deposited on the PS film is placed in an acidic 8mmol / L palladium ch...

Embodiment 2

[0028] (1) Pretreatment of matrix glassy carbon electrode: Polish with 0.05μm alumina powder, rinse the polished electrode with deionized water to remove dirt, and then pass through 2mol / L sodium hydroxide, analytical grade ethanol, 2mol / LHCl and ultrasonic washing with secondary water.

[0029] (2) Preparation of PS template: Drop-coat 5 μL of PS bead aqueous solution (uniformly ultrasonicated) on the pretreated glassy carbon electrode, place it in the dark at room temperature for 24 hours, and then put it in a vacuum oven at 70°C for one hour . In this process, the PS spheres are freely assembled, and a large-scale PS template with a network structure with layers of pores is formed on the surface of the pretreated glassy carbon electrode, which is beneficial to the electrochemical deposition of palladium particles in the third step.

[0030] (3) Preparation of palladium nanomaterials: the electrode deposited on the PS film is placed in an acidic 8mmol / L palladium chloride ...

Embodiment 3

[0034] (1) Pretreatment of matrix glassy carbon electrode: Polish with 0.05μm alumina powder, rinse the polished electrode with deionized water to remove dirt, and then pass through 2mol / L sodium hydroxide, analytical grade ethanol, 2mol / L hydrochloric acid and secondary water ultrasonic cleaning.

[0035](2) Preparation of PS template: Drop-coat 5 μL of PS bead aqueous solution (uniformly ultrasonicated) on the pretreated glassy carbon electrode, place it in the dark at room temperature for 24 hours, and then put it in a vacuum oven at 70°C for one hour . In this process, the PS spheres are freely assembled, and a large-scale PS template with a network structure with layers of pores is formed on the surface of the pretreated glassy carbon electrode, which is beneficial to the electrochemical deposition of palladium particles in the third step.

[0036] (3) Preparation of palladium nanomaterials: the electrode deposited on the PS film is placed in an acidic 8mmol / L palladium...

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Abstract

The invention relates to a preparation method and an application of a palladium nanomaterial used as a non-enzymatic glucose sensor. The technical scheme of the invention comprises the following steps of: polishing an electrode with 0.05 micron of alumina powder, washing with deionized water, and then sequentially performing ultrasonic washing by 2mol / L of NaOH, ethanol and 2mol / L of HCl and secondary water; dropping 5ml of PS globule aqueous liquor on the glassy carbon electrode of a substrate, placing away from light at room temperature, and then placing in a vacuum oven to dry at 70 DEG C to obtain a PS mould; placing the glassy carbon electrode of the substrate in PdCL2 liquor, depositing 0.03 Coulomb of Pd particles in i-t at -0.3V, slightly swinging and then, thoroughly washing with secondary water and blowing with nitrogen to obtain the palladium nanomaterial. The deficiency of the small active area is overcome. High glucose oxidization current is obtained by improving the active area of the electrode, while electrocatalytic oxidation current of concomitant interferent is not changed to a great extent, thus, the sensitivity and selectivity of analysis of glucose are improved, and meanwhile, the influence of the interferent is further eliminated.

Description

technical field [0001] The invention belongs to the technical field of electrochemical detection and analysis, and relates to a preparation method and application of a palladium nanometer material that can be used as a non-enzymatic glucose sensor. Background technique [0002] Although the research history of enzyme-free glucose sensors is still relatively short, it is believed that with the further deepening of research, especially the participation of nanoporous materials and polymers, the development of enzyme-free glucose sensors will have a wider development space, so that It has higher sensitivity, better selectivity and more ideal precision. [0003] Before the present invention, the nanoparticles were directly prepared without the influence of enzyme-free nanomaterials, such as other substances such as ascorbic acid (AA), uric acid (UA), and dopamine acid (AP). The mechanism of electrocatalytic oxidation of glucose and its coexisting interferents on the electrode i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25C5/02G01N27/30G01N27/416
Inventor 杨晨吴足军高倩胡效亚
Owner YANGZHOU UNIV