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Carbon-nitrogen hybrid material of lamellar structure and application thereof

A technology of hybrid materials and carbon-nitrogen materials, applied in organic chemistry, chemical instruments and methods, chemical/physical processes, etc., can solve problems such as increasing surface area and no research reports, and achieve the effect of improving conversion rate

Active Publication Date: 2013-10-23
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In these types of reactions, it is the mesoporous carbon-nitrogen material that really plays a catalytic role. Making carbon and nitrogen into a mesoporous structure changes the shape of its surface and increases the surface area, so that carbon and nitrogen have catalytic activity. However, there are no research reports on layered carbon-nitrogen nanomaterials similar to graphite films.

Method used

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  • Carbon-nitrogen hybrid material of lamellar structure and application thereof
  • Carbon-nitrogen hybrid material of lamellar structure and application thereof
  • Carbon-nitrogen hybrid material of lamellar structure and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Weigh 2.00g of cyanamide crystals, put them into a small quartz tube, cover the small quartz tube with a large quartz tube, carry out vacuum treatment, and then put the quartz tubes into the tube furnace together, and the quartz tube basically remains in the tube furnace. In the constant temperature zone of the furnace, the temperature of the tube furnace was raised from room temperature to 550 °C at 4 °C / min, and kept for 4 hours, and naturally cooled to room temperature to obtain a light yellow solid powder, which was vacuum-dried at 70 °C for 4 hours, then cooled and ground to obtain a light yellow powder Carbon-nitrogen layered compound composite solid powder. Its X-ray diffraction as figure 1 shown. Its infrared spectrum is as figure 2 shown. Its scanning electron microscope appearance is as image 3 shown. Its transmission electron microscope appearance is as follows Figure 4 shown.

[0040] The catalytic performance test of the material prepared in Examp...

Embodiment 2

[0042] Weigh 2.00g of bentonite (purchased from Zhejiang Changan Renheng Technology Co., Ltd.), add about 100ml of distilled water, and stir magnetically for 10 minutes, then add 2.0g of cyanamide for exchange adsorption, mix well under magnetic stirring, and stir for 30 minutes. Centrifuge, wash with water for 3 times, and dry in a watch glass at 70°C for 12 hours. The obtained white solid particles are ground and packed into bags.

[0043] Weigh 1.00g of the above-mentioned granular material into a small quartz tube, cover it with a large quartz tube, carry out vacuum treatment, and then put the quartz tube into the tube furnace together, and the quartz tube is basically kept in the constant temperature zone of the tube furnace. The tube furnace was heated from room temperature to 550 °C at 4 °C / min, and kept for 4 hours, and naturally cooled to room temperature to obtain a gray solid powder, which was vacuum-dried at 70 °C for 4 hours, then cooled and ground, and the obtaine...

Embodiment 3

[0046] Weigh 2.00g of ammonium saponite (purchased from Ninghai Jiahe Chemical Co., Ltd.), add about 100ml of distilled water, and stir magnetically for 10 minutes, add 2.0g of cyanamide for exchange adsorption, mix well under magnetic stirring, and stir for 30 minutes. Centrifuge, wash with water for 3 times, and dry in a watch glass at 70°C for 12 hours. The obtained white solid particles are ground and packed into bags. Weigh 1.00g of the above-mentioned granular material into a small quartz tube, cover it with a large quartz tube, carry out vacuum treatment, and then put the quartz tube into the tube furnace together, and the quartz tube is basically kept in the constant temperature zone of the tube furnace. The tube furnace was heated from room temperature to 550 °C at 4 °C / min, and kept for 4 hours, and naturally cooled to room temperature to obtain a gray solid powder, which was vacuum-dried at 70 °C for 4 hours, then cooled and ground, and the obtained gray solid powder...

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Abstract

The invention provides a carbon-nitrogen hybrid material of a lamellar structure and an application thereof. The preparation method of the carbon-nitrogen hybrid material of lamellar structure comprises the following steps: (1) dispersing a layered template material in water, adding a carbon-nitrogen material to perform exchange adsorption, centrifugally separating, washing with water and drying to obtain granular materials, wherein the layered template material is one of the following ingredients: hectorite, bentonite, kaolinite, ammonium soapstone, fluorine soapstone, attapulgite and pyrophyllite; (2) putting the granular materials in a constant temperature region of a tubular furnace, increasing the temperature of the tubular furnace from the room temperature to 350-650 DEG C at a speed of 1-10 DEG C / min, holding the temperature to react for 2-8h to obtain a layered carbon-nitrogen compound composite material; and (3) adding hydrofluoric acid in the layered carbon-nitrogen compound composite material to remove the template material to obtain the carbon-nitrogen hybrid material of lamellar structure. Novel carbon-nitrogen hybrid material with a lamellar structure is synthesized by the preparation method of the invention for the first time, and the material is used as a catalyst to greatly improve the conversion rate of methanol dehydration reaction.

Description

(1) Technical field [0001] The invention relates to a carbon-nitrogen hybrid material with a thin layer sheet structure and its application, especially its application as a catalyst in methanol dehydration reaction. (2) Technical background [0002] Carbon-nitrogen materials have the characteristics of very good hardness, low density and chemical inertness, which has aroused great interest in the scientific community. At present, the synthesized carbon-nitrogen materials with different structures are g-C 3 N 4 , α-C 3 N 4 , β-C 3 N 4 , cubic-C 3 N 4 and pseudo-cubic-C 3 N 4 Wait. β-C 3 N 4 , cubic-C 3 N 4 and Pseudocube-C 3 N 4 All have very high hardness, and their structure and characteristics are similar to diamond, so it is expected to replace diamond and become a new hard material. But due to the C elements and the N 2 The molecules all have high thermodynamic stability, and it is still very difficult to prepare carbon-nitrogen materials with the above...

Claims

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Application Information

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IPC IPC(8): B01J31/02B01J35/02C07C43/04C07C41/09
Inventor 童东绅周春晖俞卫华江根锋
Owner ZHEJIANG UNIV OF TECH
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