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Preparation method and application of layered nickel-cobalt hydroxide

A hydroxide and layered technology, applied in measuring devices, material analysis through electromagnetic means, instruments, etc., can solve the problems of limiting the application of electrode materials, difficult to effectively control the multi-level structure of LDHs, and achieve high sensitivity and linearity The effect of a wide range and a large detection range

Inactive Publication Date: 2017-10-20
NANJING TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

These methods are often difficult to effectively control the hierarchical structure of LDHs, which limits their application as electrode materials.

Method used

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  • Preparation method and application of layered nickel-cobalt hydroxide
  • Preparation method and application of layered nickel-cobalt hydroxide
  • Preparation method and application of layered nickel-cobalt hydroxide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Embodiment 1: Preparation of ZIF-67 nanoparticles

[0021] Weigh 3mmol of Co(NO 3 ) 2 ·6H 2 O was dissolved in 30ml of anhydrous methanol solution, 24mmol of 2-methylimidazole was dissolved in 20ml of anhydrous methanol solution, and the two solutions were mixed after ultrasonic dissolution. After standing at room temperature for 24 hours, it was centrifuged and washed three times with methanol. Put the washed ZIF-67 into a vacuum drying oven to dry at room temperature for 12 hours. Such as figure 1 Shown is the obtained ZIF-67 scanning electron microscope (SEM) characterization diagram.

[0022] Preparation of ZIF-67-derived Nickel-Cobalt Layered Double Hydroxides

[0023] The ZIF-67 of weighing 8mg is dispersed in the ethanol of 2ml, the Ni(NO of 16mg 3 ) 2 ·6H 2 O was dissolved in 2ml of ethanol, ultrasonically dissolved, placed in an oil bath at 75°C, stirred and heated to reflux for 6 hours. Centrifuge, wash with absolute ethanol three times, put into a v...

Embodiment 2

[0024] Embodiment 2: The method for preparing ZIF-67 nanoparticles is as in Example 1

[0025] Weigh 8mg of ZIF-67 and disperse it in 2ml of N,N-dimethylformamide, 40mg of Ni(NO 3 ) 2 ·6H 2 O was dissolved in 5ml of N,N-dimethylformamide and sonicated. Put it into an oil bath at 115° C., stir and heat to reflux for 0.5 hour. Centrifuge, wash with N,N-dimethylformamide three times, put in a vacuum drying oven at room temperature and dry overnight to obtain layered nickel-cobalt hydroxide. Its detection sensitivity is 243.12μA mM -1 cm -2 , The detection limit is 3.1μM, and the linear range is 0.01-2mM.

Embodiment 3

[0026] Embodiment 3: The method for preparing ZIF-67 nanoparticles is as in Example 1

[0027] Weigh 8mg of ZIF-67 and disperse it in 2ml of N,N-dimethylformamide, 8mg of Ni(NO 3 ) 2 ·6H 2 O was dissolved in 5ml of ethanol and sonicated. Put it into an oil bath at 65° C., stir and heat to reflux for 10 hours. Centrifuge, wash with N,N-dimethylformamide three times, put in a vacuum drying oven at room temperature and dry overnight to obtain layered nickel-cobalt hydroxide. Its detection sensitivity is 242.87μA mM -1 cm -2 , The detection limit is 2.97μM, and the linear range is 0.01-2mM.

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Abstract

The invention discloses a preparation method and an application of a layered nickel-cobalt hydroxide. ZIF-67 and Ni salt are mixed into an organic solvent at certain proportion and concentration, are heated and refluxed under the condition of magnetic stirring, and are centrifuged and separated, washed, and dried in vacuum to obtain a final product. The preparation method is simple and quick, the material is used to detect glucose, the detection sensitivity is very high, the detection scope is relatively wide, and the material has a great application prospect in the field of blood sugar monitoring.

Description

technical field [0001] The invention relates to the field of preparation of MOF derived materials and enzyme-free electrochemical detection of glucose, in particular to a preparation method and application of layered nickel-cobalt hydroxide. Background technique [0002] Diabetes mellitus is a disease caused by metabolic disorders, which is mainly characterized by insulin deficiency and blood glucose concentration is often higher or lower than 4.4–6.6mmol / L. Both diagnosing and treating diabetes require close monitoring of blood sugar levels. Currently, glucose sensors can be mainly divided into two categories; glucose oxidase (GOD) sensing and non-enzymatic glucose sensors. Technical means include spectrophotometry and electrochemical methods. Among these methods, electrochemical method is the most widely used method due to its simplicity, high sensitivity and high selectivity. Glucose oxidase has been widely used in electrochemical detection due to its high sensitivity ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/327
CPCG01N27/327
Inventor 霍峰蔚孔雪莹郑冰张所瀛肖亚文雷杰
Owner NANJING TECH UNIV
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