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BP (black phosphorus)-based modified electrode for detecting H2O2 and preparation method of modified electrode

A technology for modifying electrodes and hydrogen peroxide, applied in the field of electrochemical biosensing, can solve the problems of difficult dispersion, poor biocompatibility, etc., and achieve the effects of good linear relationship, simple preparation method, and simple and fast method.

Inactive Publication Date: 2018-07-27
SHANGHAI INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, black phosphorus itself has poor biocompatibility and is not easily dispersed in the aqueous phase

Method used

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  • BP (black phosphorus)-based modified electrode for detecting H2O2 and preparation method of modified electrode
  • BP (black phosphorus)-based modified electrode for detecting H2O2 and preparation method of modified electrode
  • BP (black phosphorus)-based modified electrode for detecting H2O2 and preparation method of modified electrode

Examples

Experimental program
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Effect test

Embodiment 1

[0022] Mix 3mL of 1mg / mL polylysine pLL aqueous solution with 1mL of 0.5mg / mL BP nanosuspension; stand at 4°C for 12h to prepare a pLL-BP mixed solution. Take 5 μL of pLL-BP dispersion and apply it dropwise on the surface of GCE, and dry it to obtain a pLL-BP-GCE composite electrode. A composite electrode (pLL-BP GCE) composed of polylysine (pLL), black phosphorus (BP), and glassy carbon electrode (GCE) was soaked in 1 mg / mL, pH 7.2 hemoglobin phosphoric acid solution (wherein the concentration of PBS was 30 mmol / L), stand at 4°C for 8 hours, and dry naturally under the condition of cutting off oxygen. 1 μL of Nafion solution (0.5 wt%) was drip-coated on the surface of the electrode, and dried naturally in a glove box to prepare a black phosphorus-based modified electrode (Hb-pLL-BP GCE).

Embodiment 2

[0026] The process conditions are basically the same as in Example 1, wherein the concentration of polylysine is 3 mg / mL, the concentration of BP nanosuspension is 2 mg / mL, and the volume ratio of polylysine and BP is 3:1. Soak a composite electrode (pLL-BP GCE) composed of polylysine (pLL), black phosphorus (BP), and glassy carbon electrode (GCE) in 2 mg / mL pH 7.8 hemoglobin phosphate solution (where the PBS concentration is 30 mM) , stand at 4°C for 14 hours, and dry naturally under the condition of cutting off oxygen. 1 μL of Nafion solution (0.5 wt%) was drip-coated on the surface of the electrode, and dried naturally in a glove box to prepare a black phosphorus-based modified electrode (Hb-pLL-BPGCE).

[0027] The black phosphorus-based modified electrode (Hb-pLL-BP GCE) and the modified electrode (Hb-pLL GCE) obtained in Example 1 of the present invention and Comparative Example 1 were used as working electrodes, the saturated calomel electrode was used as a reference el...

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Abstract

The invention discloses a BP (black phosphorus)-based modified electrode for detecting H2O2 and a preparation method of the modified electrode. Firstly, a pLL (polylysine) solution and a BP nanosuspension are mixed and left to stand, and a pLL-BP mixed solution is prepared; the pLL-BP mixed solution is dropwise added to the surface of a GCE (glassy carbon electrode), and a pLL-BP GCE composite electrode is formed; finally, the pLL-BP GCE composite electrode is soaked in a Hb (hemoglobin) phosphoric acid solution with the concentration of 1-4 mg / mL, the mixture is left to stand at the temperature of 0-4 DEG C for 8-14 h, and the BP-based modified electrode Hb-pLL-BP GCE is prepared. The modified electrode Hb-pLL-BP GCE is prepared with the simple preparation method and is accurate in detection result, high in detection sensitivity and good in selectivity when applied to electro-catalysis detection of H2O2.

Description

technical field [0001] The invention relates to the technical field of electrochemical biosensing, in particular to a black phosphorus-based modified electrode for detecting hydrogen peroxide and a preparation method thereof. Background technique [0002] Two-dimensional black phosphorus (black phosphorus, BP) is the latest two-dimensional nanomaterial that has been exfoliated since the discovery of graphene and molybdenum disulfide, and has a wrinkled honeycomb sheet structure. The special spatial structure makes the two-dimensional black phosphorus flakes have extremely high carrier mobility, layer number-dependent adjustable bandgap width, in-plane electrothermal transport anisotropy, and excellent optical absorption properties. The special electronic and optical properties make two-dimensional black phosphorus have broad application prospects in the fields of optoelectronic devices, solar cells, nanoelectric devices, and thermoelectric devices. However, there are few st...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/30G01N27/416
CPCG01N27/30G01N27/416
Inventor 赵韵诸葛臻陶建伟唐意红
Owner SHANGHAI INST OF TECH
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