Bimetallic doped graphene nano material and application thereof

A nanomaterial and graphene technology, applied in the field of nanotechnology and catalytic materials, can solve the problems of low electron transfer efficiency and achieve the effects of inhibiting mold growth, preventing recurrence, and high reactivity

Inactive Publication Date: 2021-02-12
CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The reason is that, in a slightly acidic environment, hydrogen peroxide will M (n+m)+ Revert to M n+ There is a high redox energy barrier in the process, and on the other hand, the electron transfer efficiency in the solution is low

Method used

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  • Bimetallic doped graphene nano material and application thereof
  • Bimetallic doped graphene nano material and application thereof
  • Bimetallic doped graphene nano material and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] A preparation method of bimetallic graphene nanomaterial Fe / Al-GN, comprising the following steps:

[0045] (1) Preparation of precursor MIL-101-NH 2 . 2-aminoterephthalic acid (2.77 g, 15 mmol) was dissolved in a round bottom flask filled with N,N-dimethylformamide (DMF, 600 mL), and the oil bath was heated to 110°C. Then, under magnetic stirring, AlCl was added every 15 minutes 3 ·6H 2 O (7.24g, 30mmol), a total of 7 times. Stirring was maintained and heating at 110°C was continued for 3 hours. After cooling to room temperature, the yellow solid was separated by filtration, washed with DMF and ethanol three times respectively, then treated in ethanol at 90°C for 16 hours, and washed several times with hot ethanol for further purification. Finally the yellow solid collected by centrifugation was dried under vacuum at 120°C for 12 hours for further use. The obtained yellow fixation is the aluminum-centered metal-organic framework compound MIL-101-NH 2 .

[0046]...

Embodiment 2

[0052] Feasibility Analysis of Bimetallic Doped Graphene Nanomaterials (Fe / Al-GN) Catalyzed Hydrogen Peroxide to Generate Hydroxyl Radicals

[0053] Using 5,5-dimethyl-1-pyrroline-N-oxide (DMPO) as OH spin-trapping agent and measuring its electron spin resonance spectrum to investigate the production of hydroxyl radicals from hydrogen peroxide catalyzed by Fe / Al-GN feasibility. The specific method is: with or without H 2 o 2 (6mM) and PBS with different pH were added Fe / Al-GN (2μg) and DMPO (100mM) respectively to obtain five groups of experimental samples, as Figure 5 shown. After all samples were mixed well, they were co-incubated at room temperature for 3 minutes. Afterwards, the EMX-8 / 2.7 spectrometer was used to measure the electron spin resonance spectra of different samples in the X-band. The parameters were set as follows: microwave frequency=9.872GHz, microwave power=6.375mW, modulation frequency=100.00kHz and modulation amplitude=1.00G. Measurement results suc...

Embodiment 3

[0055] Catalytic activity of bimetallic doped graphene nanomaterials (Fe / Al-GN) in different pH environments

[0056] Since free radicals can degrade methylene blue, this example evaluates its catalytic activity by measuring the change in absorbance of methylene blue before and after the treatment of bimetallic-doped graphene nanomaterials. They are 7.4, 6.9, 6.5, 5.4 respectively. To the PBS solution with different pH, add methylene blue (final concentration 5mg / L), Fe-GN (final concentration 20μg / mL) and H 2 o 2 (final concentration 13mM), after mixing well, co-incubate at room temperature for 1 hour. At the same time, set up two negative control groups, on the basis of the positive experimental group ① (pH 7.4), remove Fe-GN and H 2 o 2 , the post-processing remains the same. After the reaction, centrifuge at 8000rpm for 6min, and collect the supernatant. The absorbance of methylene blue in the samples was measured with a UV-2700 ultraviolet spectrometer. The measure...

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Abstract

The invention discloses a bimetallic doped graphene nano material and application thereof. The preparation method of the bimetallic doped graphene nano material comprises the following steps: taking ametal organic framework as a synthesis precursor, loading transition metal elements and dicyandiamide on the metal organic framework by adopting a double-solvent method, and harvesting precipitates from a mixed solution; drying the precipitate, and carrying out high-temperature calcination in an inert atmosphere to obtain a carbonized product; and sequentially carrying out acid etching, washing and drying on the obtained carbide to obtain the bimetallic doped graphene nano material. The bimetallic doped graphene nano material is characterized in that hydrogen peroxide can be efficiently catalyzed in a weak acid or even neutral environment to generate free radicals with a strong oxidizing property, and the bimetallic doped graphene nano material has high catalytic efficiency and a high hydrogen peroxide utilization rate. The bimetallic doped graphene nano material can be applied to inhibition of bacterial growth, degradation of formaldehyde in the environment and assistance of tumor surgery excision, and the tumor excision rate is increased. Therefore, the material has a good social value and clinical application prospect.

Description

technical field [0001] The invention relates to the fields of nanotechnology and catalytic materials, in particular to a bimetallic doped graphene nanomaterial and its application. Background technique [0002] The Fenton reaction refers to the use of transition metal-containing Fenton reagents to catalyze hydrogen peroxide (H 2 o 2 ) The inorganic chemical reaction of generating hydroxyl radicals (·OH), accidentally discovered by British chemist H.J.Fenton in 1893. Due to the strong oxidative properties of the generated hydroxyl radicals, a large number of Fenton reagents have been developed for antibacterial, formaldehyde removal, tumor diagnosis and treatment and other fields. However, most of the currently reported Fenton reagents need to be in a strong acid environment (pH 2-4.5) to mediate an efficient Fenton reaction, and there are slow reaction rates, H 2 o 2 The shortcomings of low utilization efficiency and non-reusable use are difficult to meet the needs of pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/86B01D53/72C02F1/72B01J23/745A01N59/16A01N59/06C09K11/65A01P3/00A01P1/00C02F101/38
CPCB01D53/007B01D53/8668C02F1/722C02F1/725B01J23/745A01N59/16A01N59/06C09K11/65C02F2305/026C02F2101/38Y02C20/30
Inventor 雷艳丽杨荣华易可孙海燕曾瑜
Owner CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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