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A functionalized black phosphorus-based modified electrode for detecting sodium nitrite and its preparation method

A technology of modifying electrodes and sodium nitrite, which is applied in the field of electrochemical biosensing, can solve the problems of little black phosphorus application research, difficult coexistence, and application limitations, and achieve rapid direct electron transfer capability, good solubility, and preparation The effect of simple method

Active Publication Date: 2019-12-03
SHANGHAI INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, at present, there is little research on the application of black phosphorus in the field of electrochemical sensing.
[0003] BP is hydrophobic and prone to aggregation, which limits its application in aqueous systems
In addition, black phosphorus is very sensitive to water and oxygen, and it is not easy to coexist in water and oxygen, especially under light conditions, it will degrade and lose its activity

Method used

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  • A functionalized black phosphorus-based modified electrode for detecting sodium nitrite and its preparation method
  • A functionalized black phosphorus-based modified electrode for detecting sodium nitrite and its preparation method
  • A functionalized black phosphorus-based modified electrode for detecting sodium nitrite and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Take 10 μL of 35wt% polydimethyldiallylammonium chloride (PDDA) solution and 200 μL of 0.5 mg / mL black phosphorus BP solution, mix them, and stir for 1 h to prepare a PDDA / BP mixed solution. 100 μL of PDDA / BP mixed solution was mixed with 0.5 μL of 1-butyl-3-methylimidazolium tetrafluoroborate ionic liquid (IL), and stirred for 1 h to prepare IL / PDDA / BP mixed solution. Take 5 μL of IL / PDDA / BP dispersion liquid and drop-coat it on the surface of GCE, and dry it to get IL / PDDA / BP GCE composite electrode. The IL / PDDA / BP GCE composite electrode was soaked in 3 mg / mL, pH 7.0 hemoglobin phosphate solution (wherein the concentration of PBS was 25 mmol / L), stood at 4°C for 10 h, and dried naturally in the absence of oxygen. 1 μL of Nafion solution (0.5wt%) was drip-coated on the surface of the electrode, and dried naturally in a glove box to obtain a functionalized black phosphorus-based modified electrode (Hb / IL / PDDA / BP GCE).

Embodiment 2

[0026] The process conditions are basically the same as in Example 1, wherein the concentration of polydimethyldiallylammonium chloride (PDDA) is 30wt%, the concentration of BP solution is 2mg / mL, and the volume ratio of PDDA and BP is 1:15. The volume ratio of PDDA / BP mixed solution and 1-butyl-3-methylimidazolium tetrafluoroborate ionic liquid (IL) was 100:1. It will be composed of 1-butyl-3-methylimidazolium tetrafluoroborate ionic liquid (IL), polydimethyldiallyl ammonium chloride (PDDA), black phosphorus (BP), glassy carbon electrode (GCE) The composite electrode (IL / PDDA / BP GCE) was soaked in 6mg / mL, pH 8.0 hemoglobin phosphate solution (in which the concentration of PBS was 25mmol / L), and stood at 4°C for 14h. Dry. 1 μL of Nafion solution (0.5wt%) was drip-coated on the surface of the electrode, and dried naturally in a glove box to obtain a functionalized black phosphorus-based modified electrode (Hb / IL / PDDA / BP GCE).

Embodiment 3

[0028] The process conditions are basically the same as in Example 1. Take 10 μL of 35wt% polydimethyldiallyl ammonium chloride (PDDA) solution and 200 μL of 0.5 mg / mL black phosphorus BP solution and mix them for 1 hour to prepare a PDDA / BP mixed solution . 100 μL of PDDA / BP mixed solution was mixed with 0.5 μL of 1-butyl-3-methylimidazolium hexafluorophosphate ionic liquid (IL), and stirred for 1 h to prepare IL / PDDA / BP mixed solution. Take 5 μL of IL / PDDA / BP dispersion liquid and drop-coat it on the surface of GCE, and dry it to get IL / PDDA / BP GCE composite electrode. The IL / PDDA / BP GCE composite electrode was soaked in 3 mg / mL, pH 7.0 hemoglobin phosphate solution (wherein the concentration of PBS was 25 mmol / L), stood at 4°C for 10 h, and dried naturally in the absence of oxygen. 1 μL of Nafion solution (0.5wt%) was drip-coated on the surface of the electrode, and dried naturally in a glove box to obtain a functionalized black phosphorus-based modified electrode (Hb / IL / P...

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Abstract

The invention discloses a functionalized black phosphorus-based modified electrode for detecting sodium nitrite and a preparation method thereof. The preparation method of the functionalized black phosphorus-based modified electrode for detecting the sodium nitrite includes the specific step of immobilizing hemoglobin (Hb) on the surface of a composite electrode composed of ionic liquid (IL), polydimethyl diallyl ammonium chloride (PDDA), black phosphorus (BP), and glassy carbon electrode (GCE) to prepare a functionalized Hb / IL / PDDA / BP GCE modified electrode. For the functionalized black phosphorus-based modified electrode for detecting the sodium nitrite and the preparation method thereof, cyclic voltammetry is adopted to study the direct electrochemical behavior of Hb at a modified electrode interface, and the modified eletrode is applied to the electrocatalytic detection of the sodium nitrite.

Description

technical field [0001] The invention relates to the technical field of electrochemical biosensing, in particular to a functionalized black phosphorus-based modified electrode for detecting sodium nitrite and a preparation method thereof. Background technique [0002] As a novel two-dimensional layered nanomaterial, two-dimensional black phosphorus (BP) has unique electronic and optoelectronic properties, such as high carrier mobility, tunable direct bandgap, and broad optical response capability. And electrothermal transfer anisotropy, etc. The special honeycomb wrinkled structure and physical and chemical properties make black phosphorus have a wide range of applications in the fields of solar cells, nanoelectronic devices, thermoelectric devices, humidity sensing, gas sensing, and ion sensing. However, at present, there are few studies on the application of black phosphorus in the field of electrochemical sensing. [0003] BP is hydrophobic and easy to aggregate, which l...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/327
CPCG01N27/3277G01N27/3278
Inventor 赵韵杨彤陶建伟诸葛臻唐意红
Owner SHANGHAI INST OF TECH
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