Three-dimension carbon cloth/nickel iron layer shaped hydroxide nanosheet composite material and application thereof

A layered hydroxide and composite material technology, applied in nickel compounds, analytical materials, material analysis by electromagnetic means, etc., can solve the problems of cumbersome preparation process, hindering electrode surface charge transfer efficiency, etc., and achieves simple preparation method, The effect of high charge transfer efficiency and good selectivity

Active Publication Date: 2018-06-01
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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Problems solved by technology

However, in the existing electrochemical analysis methods, the preparation process of electrode materials is cumbersome, and the use of binders greatly hinders the charge transfer efficiency on the electrode surface. Electrode material for rapid, efficient and selective detection of nitrite ions in water

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  • Three-dimension carbon cloth/nickel iron layer shaped hydroxide nanosheet composite material and application thereof
  • Three-dimension carbon cloth/nickel iron layer shaped hydroxide nanosheet composite material and application thereof
  • Three-dimension carbon cloth/nickel iron layer shaped hydroxide nanosheet composite material and application thereof

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preparation example Construction

[0021] A three-dimensional carbon cloth / nickel-iron layered hydroxide nanosheet composite material, the preparation method of which comprises the following steps:

[0022] Step A, placing carbon in nitric acid with a concentration of 3 mol / L, and reacting for 2 hours at a reaction temperature of 100-120° C., so as to prepare a functionalized three-dimensional carbon cloth.

[0023] Step B, soaking the functionalized three-dimensional carbon cloth in ferric nitrate (ie Fe(NO 3 ) 3 ), nickel nitrate (i.e. Ni(NO ) 3 ) 2 ), urea (i.e. CO(NH 2 ) 2 ) and ammonium fluoride (ie NH 4 In the mixture of F), the molar ratio of ferric nitrate, nickel nitrate, urea and ammonium fluoride is 0.5:1.5:10:5, and the reaction temperature is 100-120 ℃ for 6-10 hours, and then cooled to room temperature, and washed and dried to prepare a three-dimensional carbon cloth / nickel-iron layered hydroxide nanosheet composite material.

[0024] Specifically, every 6cm 2 The amount of ferric nitrate ...

Embodiment 1

[0029] A three-dimensional carbon cloth / nickel-iron layered hydroxide nanosheet composite material, the preparation method of which comprises the following steps:

[0030] Step a. Arranging carbon with a size of 2cm×3cm in a high-pressure reactor filled with 3mol / L nitric acid, and reacting at a reaction temperature of 120°C for 2 hours to prepare a functionalized three-dimensional carbon cloth.

[0031]Step b. Dissolve 0.5mmol ferric nitrate, 1.5mmol nickel nitrate, 10mmol urea, and 5mmol ammonium fluoride in the same 35ml deionized water, mix them together, and then soak the functionalized three-dimensional carbon cloth in the mixture , continue stirring for 10 minutes, then transfer the mixture to a 50ml autoclave, and react at 120°C for 8 hours. After the reaction is completed, cool to room temperature, take out the obtained product and wash it thoroughly to remove the surface of the product. Physical attachment, and then place the product at 60°C for drying treatment, so ...

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Abstract

The invention discloses a three-dimension carbon cloth/nickel iron layer shaped hydroxide nanosheet composite material and application thereof. A preparation method of the material comprises the following steps: putting carbon cloth into 3 mol/L nitric acid, and enabling the components to react for 2 hours at a reaction temperature of 120 DEG C so as to obtain functionalized three-dimensional carbon cloth; soaking the functionalized three-dimensional carbon cloth into a mixture of ferric nitrate, nickel nitrate, urea and ammonium fluoride, enabling the components to react for 6-10 hours at a reaction temperature of 100-120 DEG C, cooling to a room temperature, washing, and drying, thereby obtaining the three-dimension carbon cloth/nickel iron layer shaped hydroxide nanosheet composite material. The three-dimension carbon cloth/nickel iron layer shaped hydroxide nanosheet composite material can be connected with a working electrode for detecting nitrate ions in water. The material is simple in preparation method, high in charge transfer efficiency, capable of rapidly, efficiently and selectively detecting nitrate ions in the water body relatively wide in linear detection range and relatively low in detection limit.

Description

technical field [0001] The invention relates to the technical field of nitrite detection in water bodies, in particular to a three-dimensional carbon cloth / nickel-iron layered hydroxide nanosheet composite material and its application. Background technique [0002] As an important intermediate product in the nitrogen cycle, nitrite exists widely in the natural environment. In the food industry, nitrite, as a food additive, has certain antibacterial and antiseptic effects. However, excessive nitrite entering the human body will oxidize the low iron hemoglobin in the blood into methemoglobin, and lose the ability to transport oxygen, thus causing tissue hypoxic damage. In addition, nitrite will react with secondary amines, which are protein decomposition products, to generate strong carcinogen nitrosamines. Therefore, it is of great significance to accurately detect nitrite in environmental water and food. [0003] At present, the methods for detecting nitrite in water mainl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/333C01G53/00
CPCC01G53/00G01N27/333
Inventor 张云霞马跃康升红张海民汪国忠
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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