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A kind of graphene composite nanomaterial and its preparation method and application

A composite nanomaterial, graphene composite technology, applied in separation methods, chemical instruments and methods, special compound water treatment, etc., to achieve good optical performance and stability, improve photocatalytic performance, and excellent performance.

Active Publication Date: 2019-04-19
威海千千鸟家纺有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is no report in the prior art to double chemically modify graphene with B and N doping at the same time to improve its performance.

Method used

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  • A kind of graphene composite nanomaterial and its preparation method and application
  • A kind of graphene composite nanomaterial and its preparation method and application

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Experimental program
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Effect test

Embodiment 1

[0023] A preparation method of a graphene composite nanomaterial, specifically comprising the steps of:

[0024] (1) Preparation of boron-nitrogen co-doped graphene: Weigh 15g of graphene oxide, add 30mL of deionized water, and ultrasonically disperse to obtain a graphene oxide dispersion, and then add 1.0 oz. g sodium borohydride and 2 g urea, and transfer the obtained mixed solution to a hydrothermal reaction kettle for 16 hours at 180° C. to obtain a precipitate, wash and dry to obtain boron-nitrogen co-doped graphene;

[0025] (2)TiO 2 / Preparation of boron-nitrogen co-doped graphene material: Take 4g of hexadecylamine and add it to 1.5mL of 0.1mol / L potassium chloride aqueous solution and 160mL of absolute ethanol, ultrasonically, and then slowly add 8mL of isopropyl titanate to react 18 hours, filtered, washed, dried to obtain TiO 2 Precursor; then get 16g of boron-nitrogen co-doped graphene in step (1) and add 80mL of ethanol, ultrasonic for about 1h to form a dispers...

Embodiment 2

[0027] A preparation method of a graphene composite nanomaterial, specifically comprising the steps of:

[0028] (1) Preparation of boron-nitrogen co-doped graphene: Weigh 10g of graphene oxide, add 20mL of deionized water, and ultrasonically disperse to obtain a graphene oxide dispersion, and then add 0.5 g sodium borohydride and 1 g urea, and transfer the resulting mixed solution to a hydrothermal reaction kettle for 18 hours at 150°C to obtain a precipitate, wash and dry to obtain boron-nitrogen co-doped graphene;

[0029] (2)TiO 2 / Preparation of boron-nitrogen co-doped graphene material: Take 3g hexadecylamine and add it to 1mL concentration of 0.15mol / L potassium chloride aqueous solution and 120mL absolute ethanol, sonicate, then slowly add 5mL isopropyl titanate to react for 15 hours, filtered, washed, and dried to obtain TiO 2 Precursor; then get 10g of boron-nitrogen co-doped graphene in step (1) and add 60mL of ethanol, ultrasonic for about 1h to form a dispersion...

Embodiment 3

[0031] A preparation method of a graphene composite nanomaterial, specifically comprising the steps of:

[0032] (1) Preparation of boron-nitrogen co-doped graphene: Weigh 20g of graphene oxide, add 40mL of deionized water, and ultrasonically disperse to obtain a graphene oxide dispersion, and then add 1.5 oz. g of sodium borohydride and 1 to 3 g of urea, and transfer the resulting mixed solution to a hydrothermal reactor at 200°C for 12 hours to obtain a precipitate, which is washed and dried to obtain boron-nitrogen co-doped graphene;

[0033] (2)TiO 2 / Preparation of boron-nitrogen co-doped graphene material: Take 3-5g of hexadecylamine and add it to 2mL of 0.05mol / L potassium chloride aqueous solution and 240mL of absolute ethanol, ultrasonically, and then slowly add 0mL of isopropyl titanate React for 20 hours, filter, wash and dry to obtain TiO 2 Precursor; then take 20g of boron-nitrogen co-doped graphene in step (1) and add 100mL of ethanol, ultrasonic for about 1h t...

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Abstract

The invention provides a graphene composite nanomaterial and a preparation method thereof. On the one hand, through the dual modification effect of B and N, the invention has higher conductivity and greater surface load than undoped graphene. The free charge density and the structural defects of graphene oxide can be effectively repaired while doping, thereby forming doped graphene with good optical performance and stability; on the other hand, the present invention combines titanium dioxide with doped graphite The coupling between graphene and graphene produces a synergistic and complementary effect, and the photogenerated electrons will be transferred to the energy band of graphene, thereby reducing the recombination rate of holes and electrons, narrowing the forbidden band of titanium dioxide, and expanding the photoresponse range. The photocatalytic performance is greatly improved, and the performance of the prepared composite material is very excellent.

Description

technical field [0001] The invention belongs to the technical field of application of nanomaterials, and in particular relates to a graphene composite nanomaterial and its preparation method and application. Background technique [0002] The study of nanomaterials is a frontier field in today's scientific research, and it is also a hot spot studied by many scientists all over the world. The magic and unknown aspects of nanomaterials have aroused people's widespread attention; the research and application of nanomaterials are currently hot spots and difficulties, and are also the focus of high-tech development. [0003] Photocatalytic technology is a hot spot in scientific research today, and its application range is very wide, such as sewage treatment, air purification, solar energy utilization, antibacterial, anti-fog, and self-cleaning functions. The development of photocatalytic technology mainly depends on the innovation and development of photocatalytic materials. The ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/24C02F1/30B01D53/86C25B1/04C25B11/06
CPCB01D53/86C25B1/04C25B11/04C02F1/30B01J27/24C02F2305/10B01D2255/802C25B1/55B01J35/39Y02W10/37Y02E60/36
Inventor 王衍根赵兴旺
Owner 威海千千鸟家纺有限公司
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