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Ferroferric oxide loaded nickel carbide layer nanotube and preparation method and application thereof

A technology of ferroferric oxide and carbon nanotubes, applied in chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, etc. Chemical properties, complex synthesis process and other issues, to achieve high accuracy and sensitivity, good selectivity, easy and fast operation

Active Publication Date: 2018-08-07
SHANGHAI UNIV OF ENG SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are still many defects in the application of artificial enzymes based on nanomaterials in biocatalysis, such as small amount of synthesis, complex synthesis process, inexact physical and chemical properties, etc. Therefore, it is necessary to optimize the structure of nanozymes, make it more stable

Method used

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  • Ferroferric oxide loaded nickel carbide layer nanotube and preparation method and application thereof
  • Ferroferric oxide loaded nickel carbide layer nanotube and preparation method and application thereof
  • Ferroferric oxide loaded nickel carbide layer nanotube and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1 4

[0066] Embodiment 1 ferroferric oxide supports nickel carbide layer nanotube (Fe 3 o 4 Preparation of @C-NT / Ni)

[0067] (1) Molybdenum trioxide (MoO 3 ) Preparation of nanorods

[0068] ①Weigh 1g ammonium molybdate tetrahydrate ((NH 4 ) 6 Mo 7 o 24 4H 2 O) be dissolved in 25mL distilled water and 5mL concentrated nitric acid (65%, 14.4mol / L) mixed solution;

[0069] ②After complete dissolution, transfer the reaction solution to a 50mL Teflon-lined stainless steel autoclave, and heat in a preheated electric oven at 180°C for 20 hours;

[0070] ③ Centrifuge and dry to get MoO 3 The nanorod has a length of 1-10 μm, with an average of 5 μm; a diameter of 50-150 nm, with an average of 100 nm.

[0071] (2) Molybdenum trioxide supported iron oxyhydroxide nanorods (MoO 3 Preparation of @FeOOH)

[0072] ① Weigh 0.288g of MoO prepared in step (1) 3 Nanorods dispersed in a mixture of 4mL absolute ethanol and 36mL water to form MoO 3 a suspension of nanorods;

[0073] ② Mi...

Embodiment 2

[0083] Embodiment 2 temperature of reaction is to Fe 3 o 4 Effect of @C-NT / Ni Solution Colorimetric Detection of Hydrogen Peroxide

[0084] (1) Prepare the mixed solution in parallel according to the following method: Take 290 μL of 0.2mol / L acetic acid-sodium acetate buffer solution with pH=4.00 in a centrifuge tube, add 6 μL of Fe 3 o 4 @C-NT / Ni (1mg / mL), 3μL hydrogen peroxide aqueous solution (0.1mol / L), 1μL 3,3',5,5'-tetramethylbenzidine (TMB, 20mmol / L), and mix well ;

[0085] (2) Place the mixed solution prepared in step (1) in a water bath at 25°C, 30°C, 35°C, 40°C, 45°C, 50°C, 55°C, and 60°C for 10 minutes;

[0086] (3) By applying an external magnetic field, Fe 3 o 4 @C-NT / Ni is separated from the reaction solution;

[0087] (4) Measure the ultraviolet absorption spectrum of the above reaction solution with an ultraviolet-visible absorption spectrophotometer.

[0088] The result is as figure 2 As shown, it can be seen from the figure that the absorbance at 6...

Embodiment 3

[0089] Example 3 Reaction pH to Fe 3 o 4 Effect of @C-NT / Ni Solution Colorimetric Detection of Hydrogen Peroxide

[0090] (1) Take 290 μL of 0.2mol / L pH=2.00, 3.00, 4.00, 5.00, 6.00, 7.00, 8.00, 9.00, and 10.00 acetic acid-sodium acetate buffer solutions in different centrifuge tubes, and add 3 μL Fe 3 o 4 @C-NT / Ni (1mg / mL), 3μL hydrogen peroxide aqueous solution (0.1mol / L), 3μL 3,3',5,5'-tetramethylbenzidine (TMB, 20mmol / L), and mix Uniform;

[0091] (2) React the mixed solution obtained in step (1) in a water bath at 50°C for 10 minutes;

[0092] (3) By applying an external magnetic field, Fe 3 o 4 @C-NT / Ni is separated from the reaction solution;

[0093] (4) Measure the ultraviolet absorption spectrum of the above reaction solution with an ultraviolet-visible absorption spectrophotometer.

[0094] The result is as image 3 As shown, it can be seen from the figure that the absorbance at 652nm increases first and then decreases with the increase of pH. 3 o 4 The o...

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Abstract

The invention belongs to the field of high polymer materials and biological medicines, and relates to a ferroferric oxide loaded nickel carbide layer nanotube and a preparation method and applicationthereof. The ferroferric oxide loaded nickel carbide layer nanotube (Fe3O4@C-NT / Ni) is in the shape of a hollow tube, has excellent electromagnetism, catalytic activity, biological compatibility and water dispersibility, has activity similar to that of peroxidase, and is used for detecting and analyzing hydrogen peroxide and bio-active substances. The preparation method of Fe3O4@C-NT / Ni is simpleand efficient, high in recycling rate, safe and environmentally friendly. The catalytic activity of Fe3O4@C-NT / Ni is similar to that of peroxidase, Fe3O4@C-NT / Ni is used for redox reaction of hydrogenperoxide as an electron acceptor, and qualitative and quantitative measurement of the hydrogen peroxide is realized; and Fe3O4@C-NT / Ni is also used for qualitative and quantitative measurement of bio-active substances which take the hydrogen peroxide as a constant-ratio product. Compared with the prior art, the method is simple and speedy, economical and environmentally friendly, wide in detection line, high in sensitivity, good in selectivity and visual.

Description

technical field [0001] The invention belongs to the field of macromolecular materials, and in particular relates to nickel-carbon nanotubes supported by ferric oxide, a preparation method and application thereof. Background technique [0002] There are currently more than 200 methods for the determination of total cholesterol, which can be divided into five categories: chemical reagent colorimetry, enzyme analysis, fluorescence, gas phase and high performance liquid chromatography. Among them, gas phase and high performance liquid chromatography require special equipment, the detection time is long, and there are many interference factors in the sample, which makes the separation effect poor; the chemical reagent colorimetric method has complicated operation steps, especially the sample pretreatment and the extraction of fat in the sample , many reagents are used, there are deviations in the measurement results, and the calculation results are complicated; the enzymatic meth...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/78G01N21/33B01J23/755
CPCB01J23/755G01N21/33G01N21/78G01N2021/775
Inventor 鲁娜张敏曾彩霞王建平苗腾张佳星
Owner SHANGHAI UNIV OF ENG SCI
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