Graphite-phase carbon nitride sheet material and preparation method thereof

A technology of graphite phase carbon nitride and phase carbon nitride sheet, which is applied in chemical instruments and methods, nitrogen and non-metallic compounds, chemical/physical processes, etc., can solve the problem of low efficiency and low visible light catalytic performance of liquid phase direct exfoliation method , unfavorable industrial production and other issues, to achieve the effect of increasing effective catalytic active sites, high visible light catalytic performance, low cost and environmental protection

Active Publication Date: 2015-12-09
SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV
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AI Technical Summary

Problems solved by technology

First of all, the liquid phase direct exfoliation method has low efficiency, high energy consumption and low yield, which is not conducive to industrial production, and the graphite phase carbon nitride sheet material prepared by the liquid phase direct exfoliation method does not contain a pore structure and has a low specific surface area. Its visible photocatalytic performance is low (Adv.Mater.2013, 25, 2452); the graphitic carbon nitride sheet material obtained by thermal etching in ai

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  • Graphite-phase carbon nitride sheet material and preparation method thereof
  • Graphite-phase carbon nitride sheet material and preparation method thereof
  • Graphite-phase carbon nitride sheet material and preparation method thereof

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preparation example Construction

[0014] An embodiment of the present invention provides a method for preparing a graphite-phase carbon nitride sheet material, which includes the following steps:

[0015] Step S1, providing a graphitic carbon nitride powder, and spreading the graphitic carbon nitride powder on a heat receiving carrier.

[0016] Step S2, placing the above-mentioned heat carrier containing graphite phase carbon nitride powder in a tube furnace, and raising the temperature of the tube furnace to 150°C~600°C under a protective gas atmosphere, and then heating the tube furnace under an ammonia atmosphere and negative pressure Keep it warm for 1min~20h in the state, and finally cool down to room temperature to obtain the graphite-phase carbon nitride sheet material. The graphitic carbon nitride sheet has a porous structure.

[0017] Among them, it is well known that a graphitic carbon nitride powder body has a plurality of carbon and nitrogen layers bonded to each other by van der Waals force. Amm...

Embodiment 1

[0032] Weigh 1g of the graphite phase carbon nitride powder material of Comparative Example 1 and spread it on the graphite paper, then place the graphite paper containing the graphite phase carbon nitride powder in a tube furnace, and raise the temperature to 150°C under a nitrogen atmosphere , and then switched to ammonia atmosphere and kept at a pressure of -10kPa for 20h, and cooled to room temperature to obtain a porous graphite phase carbon nitride sheet material.

Embodiment 2

[0034] Weigh 1g of the graphite phase carbon nitride powder material of Comparative Example 2 and spread it on the crucible, then place the crucible containing the graphite phase carbon nitride powder in a tube furnace, heat up to 400°C under a nitrogen atmosphere, and then Switch to the ammonia atmosphere and keep the temperature at -10kPa for 1h, and cool to room temperature to obtain the porous graphite phase carbon nitride sheet material.

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Abstract

A preparation method of a graphite-phase carbon nitride sheet material comprises steps as follows: graphite-phase carbon nitride powder is provided, and the graphite-phase carbon nitride powder is flatly spread on a heated carrier; the heated carrier containing the graphite-phase carbon nitride powder is placed in a tubular furnace, the tubular furnace is heated to 150 DEG C-600 DEG C under the atmosphere of protective gas, the heated carrier containing the graphite-phase carbon nitride powder is kept at the temperature for 1 min-20 h in the ammonia gas atmosphere under negative pressure and finally cooled to the room temperature, and the graphite-phase carbon nitride sheet material is obtained. The invention further provides the graphite-phase carbon nitride sheet material prepared with the method.

Description

technical field [0001] The invention relates to a graphite phase carbon nitride sheet material and a preparation method thereof. Background technique [0002] Most of the visible light catalysts discovered so far are transition metal semiconductor materials. However, such semiconductor materials have obvious disadvantages such as high cost, low photocatalytic efficiency, and non-environmental protection, which seriously restrict their wide application as visible light catalysts. In 2009, Wang Xinchen and others discovered that the organic semiconductor material - graphitic carbon nitride (g-C 3 N 4 ) has excellent visible light photocatalytic decomposition of water to produce hydrogen performance (Nat.Mater.2009,8,76). In addition, the material has excellent physical and chemical properties such as good chemical and thermal stability, no metal, and good visible light response, which has attracted extensive attention from researchers at home and abroad. Graphite carbon nit...

Claims

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Application Information

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IPC IPC(8): B01J27/24C01B21/082
Inventor 杨全红梁庆华黄正宏游从辉吕伟康飞宇
Owner SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV
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