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Two-dimensional FeNi3/NiFe-MMOs heterostructure material and preparation method and application thereof

A heterostructure and reaction technology, applied in the field of preparation of two-dimensional FeNi3/NiFe-MMOs heterostructure materials, can solve the problems of high price and low reserves of precious metals, and achieve the effect of simple preparation, large reserves and high stability

Inactive Publication Date: 2022-02-11
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, most of the research on this topic uses noble metal-based catalysts, but noble metals have disadvantages such as high price and low reserves.

Method used

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  • Two-dimensional FeNi3/NiFe-MMOs heterostructure material and preparation method and application thereof
  • Two-dimensional FeNi3/NiFe-MMOs heterostructure material and preparation method and application thereof
  • Two-dimensional FeNi3/NiFe-MMOs heterostructure material and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Step 1: Weigh 0.15g NiCl 2 ·6H 2 O, 0.04g FeCl 3 ·6H 2O, 0.24g urea, 0.006g sodium citrate, dissolved in deionized water, and continued to add deionized water to 40mL, magnetically stirred for 20min. The solution was transferred to a high-pressure reactor, and the high-pressure reactor was sealed and then placed in an electric heating constant temperature blast drying oven. Rise from room temperature to 140°C at a heating rate of 5°C / min, and keep at 140°C for 8 hours. After cooling down to room temperature naturally, the reactor was taken out and the precipitate was extracted by centrifugation, washed alternately with deionized water and absolute ethanol several times, and then stored in a vacuum drying oven at 60°C for 6 hours to dry the sample. Two-dimensional NiFe-LDH was obtained.

[0035] Step 2: Pour the obtained product into a porcelain boat, lay it flat and transfer it to a tube furnace, raise the temperature from room temperature to 400°C at a rate of 1°C...

Embodiment 2

[0041] Step 1: Weigh 0.15g NiCl 2 ·6H 2 O, 0.04g FeCl 3 ·6H 2 O, 0.30g urea, 0.006g sodium citrate, dissolved in deionized water, and continued to add deionized water to 40mL, magnetically stirred for 20min. The solution was transferred to a high-pressure reactor, and the high-pressure reactor was sealed and then placed in an electric heating constant temperature blast drying oven. Rise from room temperature to 140°C at a heating rate of 5°C / min, and keep at 140°C for 8 hours. After cooling down to room temperature naturally, the reactor was taken out and the precipitate was extracted by centrifugation, washed alternately with deionized water and absolute ethanol several times, and then stored in a vacuum drying oven at 70°C for 12 hours to dry the sample. Two-dimensional NiFe-LDH was obtained.

[0042] Step 2: Pour the obtained product into a porcelain boat, lay it flat and transfer it to a tube furnace, raise the temperature from room temperature to 400°C at a rate of 1...

Embodiment 3

[0045] Step 1: Weigh 0.15g NiCl 2 ·6H 2 O, 0.04g FeCl 3 ·6H 2 O, 0.24g urea, 0.006g sodium citrate, dissolved in deionized water, and continued to add deionized water to 40mL, magnetically stirred for 20min. The solution was transferred to a high-pressure reactor, and the high-pressure reactor was sealed and then placed in an electric heating constant temperature blast drying oven. Rise from room temperature to 120°C at a heating rate of 5°C / min, and keep at 120°C for 10 hours. After cooling down to room temperature naturally, the reactor was taken out and the precipitate was extracted by centrifugation, washed alternately with deionized water and absolute ethanol several times, and then stored in a vacuum drying oven at 60°C for 6 hours to dry the sample. Two-dimensional NiFe-LDH was obtained.

[0046] Step 2: Pour the obtained product into a porcelain boat, lay it flat and transfer it to a tube furnace, raise the temperature from room temperature to 400°C at a rate of 1...

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Abstract

A preparation method of a two-dimensional FeNi3 / NiFe-MMOs heterostructure comprises the following steps: preparing a mixed solution from raw materials of nickel salt, iron salt, a precipitator urea and a proppant sodium citrate according to a certain concentration and proportion, transferring the mixed solution into a reaction kettle, and carrying out a hydrothermal reaction at a certain temperature program to prepare NiFe-LDH; calcining the NiFe-LDH according to a certain temperature program, and collecting a product after the reaction is finished, so as to obtain NiFe-LDH; and subjecting the NiFe-LDO to a reaction according to a certain temperature program, so as to partially separate a FeNi3 alloy phase out from the NiFe-LDO in situ according to the proportion of Fe to Ni being 1:3 and further to form the two-dimensional FeNi3 / NiFe-MMOs heterostructure material. The invention also discloses an application of the two-dimensional FeNi3 / NiFe-MMOs heterostructure material obtained by the preparation method as a catalyst, especially the application of the two-dimensional FeNi3 / NiFe-MMOs heterostructure material as the catalyst in conversion of p-nitrophenol into p-aminophenol. The method has the advantages of simple synthesis method, high catalytic activity of the obtained material, low cost and the like.

Description

technical field [0001] The invention belongs to the technical field of new materials, and relates to a catalyst for converting p-nitrophenol to p-aminophenol, especially a two-dimensional FeNi 3 / NiFe-MMOs heterostructure material preparation method. Background technique [0002] In modern agriculture and industry, the consumption of pesticides and dyes is huge. As a common intermediate in the synthesis of pesticides and fuels, p-nitrophenol inevitably permeates into the environment along with the progress of industry and agriculture, causing p-nitrophenol to be in surface water and groundwater. concentration is increasing year by year. [0003] p-Nitrophenol is a toxic pollutant that is highly irritating to human eyes and skin. It can also cause serious symptoms such as verticillium wilt, confusion, and coma. In view of this, scientists have conducted a lot of exploration on how to deal with the pollution of p-nitrophenol in environmental water. Among them, sodium boro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/755C07C213/02C07C215/76C07C217/84C07C221/00C07C223/06C07C209/32C07C211/47C07C215/68
CPCB01J23/755C07C213/02C07C221/00C07C209/325B01J35/23C07C215/76C07C217/84C07C223/06C07C211/47C07C215/68
Inventor 温鸣周健
Owner TONGJI UNIV
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