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A preparation method of carbon nitride ultrathin sheet with adjustable atomic layer number

A carbon nitride, atomic layer technology, applied in chemical instruments and methods, nitrogen compounds, nitrogen and non-metallic compounds, etc., can solve the problems of uncontrollability, long stripping time, low yield, etc. The effect of low cost and fast process

Active Publication Date: 2019-07-23
武汉莱瑞医疗科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the biggest disadvantages of these stripping methods are low yield, long stripping time, and g-C 3 N 4 The number of atomic layers is uncontrollable, which is the bottleneck of its research and practical application

Method used

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  • A preparation method of carbon nitride ultrathin sheet with adjustable atomic layer number
  • A preparation method of carbon nitride ultrathin sheet with adjustable atomic layer number
  • A preparation method of carbon nitride ultrathin sheet with adjustable atomic layer number

Examples

Experimental program
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Effect test

Embodiment 1

[0022] Weigh 3.0g of melamine in a container, put it into a muffle furnace, raise the temperature from room temperature to 550°C in the air, the heating rate is 5°C / min, keep the temperature for 4 hours, and naturally cool to room temperature to obtain yellow Bulk g-C 3 N 4 product.

Embodiment 2

[0024] Weigh 3.0g of dicyandiamide into a container, put it into a muffle furnace, raise the temperature from room temperature to 550°C in the air, the heating rate is 5°C / min, keep the temperature for 4 hours, and naturally cool to room temperature to obtain yellow Bulk g-C 3 N 4 product.

Embodiment 3

[0026] Weigh 6.0g of thiourea into a container, put it into a muffle furnace, and raise the temperature from room temperature to 550°C in the air at a rate of 5°C / min. After constant temperature for 4 hours, cool naturally to room temperature to obtain yellow Bulk g-C 3 N 4 product.

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Abstract

The invention relates to a preparation method with adjustable number of carbon nitride atomic layers. Weighing 3 to 9 g Bulk g‑C 3 N 4 Rapidly heat the container to 550-580°C for thermal expansion for 10-20 minutes, then take it out, immediately add liquid nitrogen to immerse the sample, and wait until the LN 2 After volatilization is completed, repeat the above steps 5 to 10 times to obtain ultra-thin flakes; Preparation of carbon nitride ultra-thin flakes: Weigh 0.12-1.2g of g‑C obtained in step (1) 3 N 4 The ultra-thin sheet is rapidly heated to a TE temperature of 550-580°C in a container, and then naturally cooled to room temperature after being kept for 10-20 minutes to obtain single atomic layer and multi-layer g-C 3 N 4 . The advantage of this invention is that it uses cheap, non-toxic stripping reagents to replace the commonly used ultrasonic stripping method of organic reagents, making it easier to prepare g-C 3 N 4 The ultrathin wafer process is fast, low-cost, environmentally friendly, and suitable for industrial large-scale preparation.

Description

technical field [0001] The invention relates to the field of photoelectrocatalytic materials, in particular to a carbon material with visible light response-graphite-like carbon nitride (g-C 3 N 4 ) preparation method with adjustable number of atomic layers. Background technique [0002] Ultrathin sheets are a new class of materials with atomic-scale thickness. Because of its unique two-dimensional structural characteristics and thickness dimensions, it will not only enhance the intrinsic properties of its materials, but also produce some new properties that the corresponding bulk materials do not have, such as optical, electrical and mechanical properties. It can be said to be one of the most promising advanced materials in the future for applications in many fields such as energy conversion and energy storage, electronics, catalysts, sensors, and biomedicine. [0003] g-C 3 N 4 It is an infinitely expanded two-dimensional sheet structure formed by connecting triazine ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B21/082B82Y30/00B01J27/24
CPCB82Y30/00C01B21/0605B01J27/24C01P2002/80C01P2004/04C01P2004/64B01J35/39
Inventor 邹菁孙艳娟江吉周刘忆吴生丽曹媛
Owner 武汉莱瑞医疗科技有限公司
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