Preparation method and application of magnetic porous nickel nanosheets

A technology of porous nickel and nanosheets, applied in the direction of nanotechnology, nanotechnology, chemical instruments and methods, etc., can solve the problems of in-depth research on toxicity and environmental impact, low catalytic efficiency, etc., and achieve wide linear detection range and excellent preparation process Simple and cost-effective

Active Publication Date: 2020-09-22
苏州机数芯微科技有限公司
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Problems solved by technology

[0004] Aiming at the low catalytic efficiency of nano-enzyme-mimetic materials in the prior art and the lack of in-depth research on their toxicity and environmental impact, the present invention proposes a method for preparing magnetic porous nickel nanosheets and its Application, the prepared magnetic porous nickel nanosheets have excellent strong magnetism and peroxide-mimicking enzyme activity, which can realize the detection of hydrogen peroxide, magnetic separation and recycling, and reduce the cost of using simulated enzymes and the risk of environmental pollution

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  • Preparation method and application of magnetic porous nickel nanosheets
  • Preparation method and application of magnetic porous nickel nanosheets
  • Preparation method and application of magnetic porous nickel nanosheets

Examples

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Embodiment 1

[0030] Add 95 mg of NiCl to a volume of 20 mL of deionized water 2 ·6H 2 O and 88 mg of sodium citrate, labeled A solution. Then, 95 mg of potassium nickel cyanate was added into 20 mL of deionized water, which was marked as solution B. Mix A solution and B solution slowly and uniformly, stir the mixed solution for 3 minutes, and let the mixed solution stand at room temperature for 12 hours, collect the product by centrifugation, rinse with deionized water and absolute ethanol for 3 times, and dry overnight in vacuum at 70°C spare.

[0031] The high-temperature calcination method is used to prepare magnetic porous nickel nanosheets. The preparation method is as follows: transfer the above-mentioned precursor powder to a corundum magnetic boat and place it in a high-temperature tube furnace. The heating rate was raised to 700°C, and after being kept in an inert atmosphere for 3 hours, it was naturally cooled to room temperature to obtain a black magnetic porous nickel nanosh...

Embodiment 2

[0033] Add 190 mg NiCl to a volume of 40 mL of deionized water 2 ·6H 2 O and 152 mg sodium citrate, labeled A solution. Then 190 mg of potassium nickel cyanate was added into deionized water with a volume of 40 mL, marked as solution B. Mix solution A and solution B uniformly and slowly, stir magnetically for 3.5 minutes, then let the mixed solution stand at room temperature for 11 hours, collect the product by centrifugation, rinse 3 times with deionized water and absolute ethanol, and dry overnight in vacuum at 70°C spare.

[0034] The high-temperature method prepares magnetic porous nickel nanosheet powder. The preparation method is as follows: transfer the above-mentioned precursor powder to a corundum magnetic boat and place it in a high-temperature tube furnace. The heating rate was increased to 660 ° C, and after 4 hours of heat preservation in an inert atmosphere, it was naturally cooled to room temperature to obtain a black magnetic porous nickel nanosheet powder. ...

Embodiment 3

[0036] Add 285 mg NiCl to a volume of 60 mL of deionized water 2 ·6H 2 O and 264 mg of sodium citrate, labeled A solution. Then 285 mg of potassium nickel cyanate was added into deionized water with a volume of 60 mL, which was marked as solution B. Mix A solution and B solution slowly and uniformly, stir the mixed solution for 4 minutes, and let the mixed solution stand at room temperature for 10 hours, collect the product by centrifugation, rinse with deionized water and absolute ethanol for 3 times, and dry overnight at 70°C under vacuum spare.

[0037] The high-temperature method prepares magnetic porous nickel nanosheet powder. The preparation method is as follows: transfer the above-mentioned precursor powder to a corundum magnetic boat and place it in a high-temperature tube furnace. The heating rate was increased to 720°C, and after 3.5 hours in an inert atmosphere, it was naturally cooled to room temperature, and a black magnetic porous nickel nanosheet powder was ...

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Abstract

The invention discloses a preparation method and application of magnetic porous nickel nanosheets, and relates to the technical field of inorganic mimic enzyme preparation. The preparation method comprises the following steps: dissolving NiCl<2>.6H2O and sodium citrate into deionized water to obtain a solution A; dissolving potassium tetracyanonickelate into deionized water to obtain a solution B;mixing the solution A and the solution B, stirring, standing for reaction, centrifuging, washing and drying to obtain a prussian blue homolog precursor; and calcining the precursor at high temperature in an inert atmosphere. According to the invention, the magnetic porous nickel nanosheets composed of a mesoporous graphite carbon ordered framework and uniformly dispersed nickel nanoparticles areprepared by a two-step method, have excellent strong magnetism and peroxide mimic enzyme activity, can realize hydrogen peroxide detection, magnetic separation and recycling, reduce the mimic enzyme use cost and environmental pollution risks, have the advantages of simple preparation process, easily available raw materials and low biological and environmental toxicity, and can be suitable for industrial large-scale production.

Description

technical field [0001] The invention relates to the technical field of preparation of inorganic mimetic enzymes, in particular to a preparation method and application of magnetic porous nickel nanosheets. Background technique [0002] As an effective biocatalytic mediator, natural enzymes have played an important role in the evolution of nature and humans. Natural enzymes have high catalytic activity, strong specificity for substrate binding, and relatively mild conditions, such as pH, temperature, and pressure required for catalytic reactions, which also lead to their catalytic activity being very sensitive to changes in environmental conditions. Sensitive, prone to denaturation and digestion, and reduces its stability. These inherent defects greatly limit the practical application potential of natural enzymes. Over the years, many scientists have been working on solving the above problems, and one of the methods is to use artificial enzyme analogs with substrate selectiv...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/755B01J35/10B82Y30/00B82Y40/00B22F1/00B22F9/30G01N21/78G01N21/33G01N21/31
CPCB01J23/755B01J35/0033B01J35/10B82Y30/00B82Y40/00B22F9/30G01N21/78G01N21/33G01N21/31B22F1/0551B22F1/07B22F1/068B22F1/054
Inventor 朱青陈晓露靳顺茹汤乐李磊磊杨丽
Owner 苏州机数芯微科技有限公司
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