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a cu 3 p@ti-mof-nh 2 Composite material, electrochemical sensor and its preparation method and application

A composite material and sensor technology, applied in the direction of material electrochemical variables, etc., can solve the problems of poor selectivity and low electrocatalytic activity, and achieve the effects of low manufacturing cost, simple process and huge application prospects

Active Publication Date: 2020-01-03
ZHENGZHOU UNIVERSITY OF LIGHT INDUSTRY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The object of the present invention is to provide a kind of Cu 3 P@Ti-MOF-NH 2 Composite materials, so as to solve the problems of low electrocatalytic activity and poor selectivity existing in the existing hydrazine hydrate detection electrode materials

Method used

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  • a cu <sub>3</sub> p@ti-mof-nh <sub>2</sub> Composite material, electrochemical sensor and its preparation method and application
  • a cu <sub>3</sub> p@ti-mof-nh <sub>2</sub> Composite material, electrochemical sensor and its preparation method and application
  • a cu <sub>3</sub> p@ti-mof-nh <sub>2</sub> Composite material, electrochemical sensor and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Cu in this example 3 P@Ti-MOF-NH 2 Composite materials are prepared in the following steps:

[0046] 1) Cu 3 Preparation of P: Add excess 0.25mol / L NaOH solution to 50mL 0.05mol / L Cu(NO 3 ) 2 ·3H 2 O solution was reacted for 0.5h, the precipitate was centrifuged, washed several times with water, and dried in vacuum to obtain Cu(OH) 2 ;

[0047] 0.05g Cu(OH) 2 and 0.25g NaH 2 PO 2 Mix and grind evenly to obtain a mixture, and place the mixture in N 2 Atmosphere at 2°C·min -1 Heated at a heating rate of 300°C, kept the temperature for 2 hours, cooled naturally, washed the black solid with ultrapure water and ethanol several times, and dried it in a vacuum oven for later use;

[0048] 2) 50mg Cu 3 P was added to the methanol solution of PVP (0.35g PVP mixed with 10mL methanol), stirred at room temperature for 12h, centrifuged and washed with methanol three times, and the obtained solid phase was dispersed in 3.6mL DMF to obtain Cu 3 P dispersion;

[0049] Add...

Embodiment 2

[0055] Cu in this example 3 P@Ti-MOF-NH 2 Composite materials are prepared in the following steps:

[0056] 1) Cu 3 The preparation of P is with embodiment 1;

[0057] 2) 5mg Cu 3 P was added to the methanol solution of PVP (0.35g PVP mixed with 10mL methanol), stirred at room temperature for 12h, centrifuged and washed with methanol three times, and the obtained solid phase was dispersed in 3.6mL DMF to obtain Cu 3 P dispersion;

[0058] Add 0.4mL methanol, 0.22g 2-aminoterephthalic acid and 0.24mL tetrabutyl titanate into the beaker, stir magnetically for 5min to form a mixed solution;

[0059] Will Cu 3 After the P dispersion and the mixed solution were mixed, they were transferred to a polytetrafluoroethylene-lined reactor and reacted at 150 °C for 48 h. The solid matter was collected by centrifugation, washed three times with methanol, and dried to obtain Cu 3 P@Ti-MOF-NH 2 -5.

[0060] The electrochemical sensor of this embodiment is prepared by referring to the...

Embodiment 3

[0062] Cu in this example 3 P@Ti-MOF-NH 2 Composite materials are prepared in the following steps:

[0063] 1) Cu 3 The preparation of P is with embodiment 1;

[0064] 2) 20mg Cu 3 P was added to the methanol solution of PVP (0.35g PVP mixed with 10mL methanol), stirred at room temperature for 12h, centrifuged and washed with methanol three times, and the obtained solid phase was dispersed in 3.6mL DMF to obtain Cu 3 P dispersion;

[0065] Add 0.4mL methanol, 0.22g 2-aminoterephthalic acid and 0.24mL tetrabutyl titanate into the beaker, stir magnetically for 5min to form a mixed solution;

[0066] Will Cu 3 After the P dispersion and the mixed solution were mixed, they were transferred to a polytetrafluoroethylene-lined reactor and reacted at 150 °C for 48 h. The solid matter was collected by centrifugation, washed three times with methanol, and dried to obtain Cu 3 P@Ti-MOF-NH 2 -20.

[0067] The electrochemical sensor of this embodiment is prepared by referring to t...

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Abstract

The invention relates to a Cu3P-coated Ti-MOF-NH2 composite material, an electrochemical sensor and a preparation method and an application thereof. The preparation method comprises the following steps: 2-aminoterephthalic acid, tetrabutyl titanate, and Cu3P are subjected to a solvent heat reaction in a solvent to obtain the product. The Cu3P and Ti-MOF-NH2 has strong synergism, effective charge separating and transfer on a catalyst interface can be promoted, and electro-catalysis oxidation effect of hydrazine hydrate is promoted. The electrochemistry test shows that the Cu3P-coated Ti-MOF-NH2composite material has protruded electrocatalytic activity on the oxidation of the hydrazine hydrate, has high sensitivity and selectivity on the hydrazine hydrate detection by an electrode producedby the composite material, and has large application prospect in the field of electrochemical analysis.

Description

technical field [0001] The invention belongs to the field of electrochemical sensors, in particular to a Cu 3 P@Ti-MOF-NH 2 Composite materials, electrochemical sensors and their preparation methods and applications. Background technique [0002] As an important chemical raw material, hydrazine hydrate is widely used in fields such as agriculture, fine chemicals, fuel cells, explosives, photographic chemicals, preservatives, weapons, emulsifiers and pharmacology. Hydrazine is classified as a carcinogen by the U.S. Environmental Protection Agency (EPA) due to its mutagenic, carcinogenic, and neurotoxic properties. Currently, there are many analytical methods for the determination of hydrazine hydrate in water, including titration, chromatography, spectrophotometry, chemiluminescent flow injection analysis, potentiometric and electroanalytic methods. When the conventional method is used for the determination of hydrazine hydrate, there are disadvantages of high instrument c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/26
CPCG01N27/26
Inventor 王明花宋英攀贾巧娟段奉和刘永康方少明张治红何领好
Owner ZHENGZHOU UNIVERSITY OF LIGHT INDUSTRY
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