Multi-doped graphene composite nano material and preparation method and application thereof

A technology of graphene composite and nanomaterials, which is applied in the direction of nanotechnology, nanotechnology, chemical instruments and methods, etc., can solve the problems of easy migration and volatilization, weak force of graphene, and poor photocatalytic performance, etc. The effects of heterostability, good photocatalytic performance and excellent absorption performance

Inactive Publication Date: 2019-07-12
杭州鼎好新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the physically adsorbed small-molecule dopants reported in the existing literature have weak interactions with graphene, are easy to migrate and volatilize, and lead to changes in the forbidden band width during placement, and poor utilization of light. The deterioration seriously limits the practical application of graphene

Method used

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  • Multi-doped graphene composite nano material and preparation method and application thereof
  • Multi-doped graphene composite nano material and preparation method and application thereof

Examples

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Effect test

Embodiment 1

[0030] A kind of preparation method of multi-doped graphene composite nano material, concrete steps are as follows:

[0031] (1) First add graphene oxide, urea and pyrophosphoric acid into absolute ethanol, and disperse it by ultrasonic wave for 20 minutes, then add the dispersion liquid of silicon, and continue ultrasonic dispersing for 20 minutes to obtain a mixed dispersion liquid;

[0032] (2) Heat the dispersion obtained in step (1) to 80°C in a water bath with stirring, and continue stirring and heating until dry to obtain a mixed powder;

[0033] (3) Under an argon atmosphere, the mixed powder obtained in step (2) is subjected to a solid-phase reaction in a tube furnace to generate pre-doped graphene oxide for later use;

[0034] (4) Mix the hydrazine hydrate dispersion of selenium and the saturated aqueous solution of sodium molybdate to make a mixed solution, then add the pre-doped graphene oxide obtained in step (3) into the mixed solution, react at 300°C for 10 hour...

Embodiment 2

[0041] A kind of preparation method of multi-doped graphene composite nano material, concrete steps are as follows:

[0042] (1) First add graphene oxide, urea, and pyrophosphoric acid into absolute ethanol, ultrasonically disperse for 30 minutes, then add silicon dispersion, and continue ultrasonically dispersing for 30 minutes to obtain a mixed dispersion;

[0043] (2) Heat the dispersion obtained in step (1) to 85°C in a water bath with stirring, and continue stirring and heating until dry to obtain a mixed powder;

[0044] (3) Under a helium atmosphere, the mixed powder obtained in step (2) is subjected to a solid-state reaction in a tube furnace to generate pre-doped graphene oxide for later use;

[0045] (4) Mix the hydrazine hydrate dispersion of selenium and the saturated aqueous solution of sodium molybdate to make a mixed solution, then add the pre-doped graphene oxide obtained in step (3) into the mixed solution, react at 400°C for 12 hours, and post-treat Obtain t...

Embodiment 3

[0052] A kind of preparation method of multi-doped graphene composite nano material, concrete steps are as follows:

[0053] (1) First add graphene oxide, urea, and pyrophosphoric acid into absolute ethanol, ultrasonically disperse for 20 minutes, then add silicon dispersion, and continue ultrasonically dispersing for 30 minutes to obtain a mixed dispersion;

[0054] (2) Heat the dispersion obtained in step (1) to 80°C in a water bath with stirring, and continue stirring and heating until dry to obtain a mixed powder;

[0055] (3) Under an argon atmosphere, the mixed powder obtained in step (2) is subjected to a solid-phase reaction in a tube furnace to generate pre-doped graphene oxide for later use;

[0056] (4) Mix the hydrazine hydrate dispersion of selenium and the saturated aqueous solution of sodium molybdate to make a mixed solution, then add the pre-doped graphene oxide obtained in step (3) into the mixed solution, react at 400°C for 10 hours, and post-treat Obtain t...

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Abstract

The invention provides a multi-doped graphene composite nano material and a preparation method and application thereof. The method comprises the steps that dispersion liquid of graphene oxide, urea, pyrophosphate and silicon dispersion liquid, a selenium hydrazine hydrate dispersion liquid, a sodium molybdate saturated aqueous solution and the like serve as raw materials to realize multi-doping ofnitrogen, phosphorus, silicon and molybdenum selenide to graphene, and the obtained multi-doped graphene composite nano material can improve the reaction dynamics of carbon, provides more active sites for energy storage, has excellent visible light absorption performance, can fully utilize sunlight to carry out photocatalytic degradation on environmental pollutants, and has good photocatalytic performance. After heteroatoms are doped, the reactivity of the graphene oxide or the graphene is improved, so that further doping of the residual heteroatoms is facilitated; moreover, the interaction among the heteroatoms further improves the doping stability.

Description

technical field [0001] The invention relates to the technical field of nanomaterials, in particular to a multi-doped graphene composite nanomaterial and its preparation method and application. Background technique [0002] Graphene is a new type of two-dimensional carbon nanomaterial with excellent thermal, optical, electrical and other properties. It is composed of a single layer of sp 2 The honeycomb-like two-dimensional crystal structure formed by the close arrangement of hybridized carbon atoms has a small monoatomic layer thickness, and the large π bond structure allows π electrons to move freely. Graphene can be used in semiconductor materials, composite materials, battery electrode materials, hydrogen storage materials, field emission materials, and ultra-sensitive sensors. [0003] At present, many literatures have reported that graphene is used in the preparation of photocatalytic materials. Photocatalytic technology is an advanced oxidation catalytic technology t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24B01J37/34B01J37/10B01J37/16B82Y30/00B82Y40/00C02F1/30C02F101/30C02F101/34C02F101/38
CPCB01J27/24B01J35/004B01J37/10B01J37/16B01J37/343B82Y30/00B82Y40/00C02F1/30C02F2101/30C02F2101/308C02F2101/34C02F2101/38C02F2101/40C02F2305/10
Inventor 李可平
Owner 杭州鼎好新材料有限公司
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