Sensor based on black phosphorus electrode and preparation method of sensor

A sensor, black phosphorus technology, applied in the direction of material electrochemical variables, etc., can solve problems that hinder the application of black phosphorus, achieve excellent performance and broad application prospects

Active Publication Date: 2015-12-02
杭州稻美科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In the prior art, one problem encountered in the application of black phosphorus nanoflakes is that they will degrade rapidly when they encounter water or oxygen, which hinders the application of black phosphorus in sensors.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The preparation of black phosphorus electrode, concrete steps are:

[0028] (1) Preparation of black phosphorus:

[0029] The raw materials are red phosphorus, white phosphorus, tin and tin tetraiodide. 25g of red phosphorus, 18g of white phosphorus, 47g of tin and 10g of tin tetraiodide are mixed and loaded into the high pressure reactor, and the pressure in the high pressure reactor is evacuated until the pressure in the high pressure reactor is 2.5GPa. Heat to make the temperature in the reactor 300°C, react for 50 minutes, cool down to 80°C within 1 hour, keep the temperature for 20 minutes, and cool down to room temperature within 1 hour to obtain black phosphorus.

[0030] (2) Preparation of black phosphorus impregnated with organic solvent PCL: grind black phosphorus to black phosphorus particles with a particle size of 30nm, disperse 20mg of black phosphorus particles into 120mL polycaprolactone (PCL) and ultrasonically shake for 50min to form a uniform solution...

Embodiment 2

[0033] The preparation of black phosphorus electrode, concrete steps are:

[0034] (1) Preparation of black phosphorus:

[0035] The raw materials are red phosphorus, white phosphorus, tin and tin tetraiodide. Mix 30g of red phosphorus, 15g of white phosphorus, 50g of tin and 5g of tin tetraiodide into a high-pressure reactor, add mercury as a catalyst, and vacuum into the high-pressure reactor. The pressure is 2.8GPa, heat the reactor to 400°C, react for 50 minutes, cool down to 60°C within 1.2 hours, keep warm for 25 minutes, and cool down to room temperature within 1.5 hours to obtain black phosphorus.

[0036] (2) Preparation of black phosphorus impregnated with organic solvent PLGA: grind black phosphorus to black phosphorus particles with a particle size of 50nm, disperse 25mg of black phosphorus particles into 100mL lactic acid-glycolic acid copolymer (PLGA) and ultrasonically shake for 100min to form a uniform Add ethylenediaminetetraacetic acid (EDTA) to the above so...

Embodiment 3

[0039] A sensor consisting of a measuring element, a conducting element, an intelligent analysis element and a display element.

[0040] The measuring element is composed of three sections, the first section is a dryer, which absorbs the moisture of the gas to be measured, the second section is a deoxygenation device, which absorbs oxygen in the gas to be measured, and reduces the oxygen concentration to 100ppm, and the third section is Black phosphorus electrode.

[0041] Information such as the amount of water absorbed by the dryer, the amount of oxygen absorbed by the oxygen removal device, and the amount of target gas absorbed by the black phosphorus electrode is transmitted to the intelligent analysis element through the conduction element. conducted to the display element.

[0042] Among them, the black phosphorus electrode of the measuring element, the specific preparation steps are:

[0043] (1) Preparation of black phosphorus:

[0044] The raw materials are red phosp...

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PUM

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Abstract

The invention discloses a sensor based on a black phosphorus electrode and a preparation method of the sensor. The preparation method comprises the following steps: 1, preparing black phosphorus; 2, dipping the black phosphorus with an organic solvent; 3, preparing the black phosphorus electrode; and 4, preparing the sensor. According to the sensor based on the black phosphorus electrode, the direct contact between oxygen or oxide and black phosphorus can be prevented, the excellent performances of black phosphorus in the electrochemical detection are exerted, a foundation is laid for the application of the black phosphorus electrode and the sensor based on the black phosphorus electrode, and the sensor and the preparation method thereof have a wide application prospect.

Description

technical field [0001] The invention relates to a black phosphorus electrode and a preparation method thereof, in particular to a sensor based on the black phosphorus electrode and a preparation method thereof. Background technique [0002] Black phosphorus (BlackPhosphorus) as a common four allotropes of phosphorus (ie: red phosphorus, white phosphorus, purple phosphorus, black phosphorus) has the highest density (2.69g / cm 3 ), the most stable one, with metallic luster and good electrical conductivity. It has a layered structure similar to graphite, and the layers are combined by van der Waals force. The biggest feature of black phosphorus structure that is different from graphite is that the phosphorus atoms in the same layer are not in the same plane, arranged in wrinkled layers along the b-axis, and the interlayer distance is larger than that of graphite (about 5 angstroms). In addition, black phosphorus is a direct band gap semiconductor with good electron mobility an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/30
Inventor 孙京华潘正海
Owner 杭州稻美科技有限公司
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