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Boron-nitrogen co-doped reduced graphene oxide aerogel as well as preparation method and application thereof

A graphene aerogel, graphene hydrogel technology, applied in aerosol preparation, chemical instruments and methods, colloid chemistry and other directions, can solve the problems of insufficient sensitivity, low selectivity, etc., achieve enhancement effect and improve conductivity , the effect of improving the detection effect

Active Publication Date: 2021-06-11
WENGFU (GRP) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing sensing methods based on graphene oxide and nucleic acid aptamer-fluorophore complexes still have the problems of low selectivity and insufficient sensitivity, and their ability to detect mercury ions needs to be improved.

Method used

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  • Boron-nitrogen co-doped reduced graphene oxide aerogel as well as preparation method and application thereof
  • Boron-nitrogen co-doped reduced graphene oxide aerogel as well as preparation method and application thereof
  • Boron-nitrogen co-doped reduced graphene oxide aerogel as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] A preparation method of boron-nitrogen co-doped reduced graphene oxide airgel, comprising the following steps:

[0038] S1. Disperse 20mg of graphene oxide in water to prepare a graphene oxide dispersion with a concentration of 1mg / mL, then add 0.1g of ammonia borane to the graphene oxide dispersion, and then keep it warm at 160°C in a hydrothermal kettle Hydrothermal reaction for 12 hours to obtain boron-nitrogen co-doped reduced graphene oxide hydrogel;

[0039] S2. The boron-nitrogen co-doped reduced graphene oxide hydrogel was washed three times with deionized water, then frozen with liquid nitrogen, and dried to obtain a boron-nitrogen co-doped reduced graphene oxide aerogel.

[0040] Wherein, the preparation method of graphene oxide is as follows:

[0041] Stir 1g of graphite powder, 0.5g of sodium nitrate and 25mL of concentrated sulfuric acid at 4°C for 1 hour, then add 3g of potassium permanganate, stir for 2 hours at 10°C, then react at 38°C for 0.5h, then ad...

Embodiment 2

[0060] A preparation method of boron-nitrogen co-doped reduced graphene oxide airgel, comprising the following steps:

[0061] S1. Disperse 20mg of graphene oxide in water to prepare a graphene oxide dispersion with a concentration of 1mg / mL, then add 0.1g of ammonia borane to the graphene oxide dispersion, and then keep it warm at 160°C in a hydrothermal kettle Hydrothermal reaction for 12 hours to obtain boron-nitrogen co-doped reduced graphene oxide hydrogel;

[0062]S2. The boron-nitrogen co-doped reduced graphene oxide hydrogel was washed three times with deionized water, then frozen with liquid nitrogen, and dried to obtain a boron-nitrogen co-doped reduced graphene oxide aerogel.

[0063] Wherein, the preparation method of graphene oxide is the same as embodiment 1.

Embodiment 3

[0065] A preparation method of boron-nitrogen co-doped reduced graphene oxide airgel, comprising the following steps:

[0066] S1. Disperse 50mg of graphene oxide in water to prepare a graphene oxide dispersion with a concentration of 1mg / mL, then add 0.3g of ammonia borane to the graphene oxide dispersion, and then keep it warm at 180°C in a hydrothermal kettle Hydrothermal reaction for 13 hours to obtain boron-nitrogen co-doped reduced graphene oxide hydrogel;

[0067] S2. The boron-nitrogen co-doped reduced graphene oxide hydrogel was washed three times with deionized water, then frozen with liquid nitrogen, and dried to obtain a boron-nitrogen co-doped reduced graphene oxide aerogel.

[0068] Wherein, the preparation method of graphene oxide is the same as embodiment 1.

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Abstract

The invention discloses a preparation method of boron and nitrogen co-doped reduced graphene oxide aerogel. The method comprises the following steps: dispersing graphene oxide in water to prepare a graphene oxide dispersion liquid; then adding ammonia borane into the graphene oxide dispersion liquid, and carrying out hydrothermal reaction to obtain boron-nitrogen co-doped reduced graphene oxide hydrogel; and washing and freeze-drying the hydrogel to obtain the boron-nitrogen co-doped reduced graphene oxide aerogel. The invention also discloses an application of the prepared boron and nitrogen co-doped reduced graphene oxide aerogel in mercury ion detection. A sensing method jointly constructed by the boron-nitrogen co-doped reduced graphene oxide aerogel, a nucleic acid aptamer and a fluorophore has high sensitivity and high selectivity on detection of mercury ions, and can be used for quantitative detection of trace mercury ions in a water body.

Description

technical field [0001] The invention relates to the technical field of graphene materials, in particular to a boron-nitrogen co-doped reduced graphene oxide airgel and a preparation method and application thereof. Background technique [0002] Mercury (Mercury, Hg), also known as mercury, atomic number 80, is a high-density, silver-white, liquid transition metal at room temperature, and is highly toxic. Since the industrial revolution, the content of mercury in the global atmosphere, water and soil has increased by about 3 times, especially in the soil, atmosphere and water near industrial areas, which seriously pollutes the living environment of human beings. Not only is pure mercury toxic, most of its compounds and salts are very highly toxic. For example, methylmercury, after entering the human body, spreads throughout the organs and tissues of the whole body, infringes on the nervous system, especially the central nervous system, and causes irreversible damage to the br...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J13/00
CPCB01J13/0095
Inventor 朱青靳顺茹陈晓露杨丽李鑫史连军张红
Owner WENGFU (GRP) CO LTD
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