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Preparation method of chromium carbide/carbon nano composite material with mesoporous structure

A composite material and mesoporous structure technology, which is used in the production field of chromium carbide/carbon nanocomposite materials, can solve the problems of low catalytic activity, etc., and achieve the effects of high reaction activity, lower synthesis reaction temperature, and increase reaction speed.

Active Publication Date: 2016-07-13
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with noble metal catalysts such as platinum, transition metal carbides have a good ability to resist poisoning by carbon monoxide, hydrocarbons, hydrogen sulfide, etc. at high concentrations, but their catalytic activity is lower than that of heavy metals.

Method used

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  • Preparation method of chromium carbide/carbon nano composite material with mesoporous structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Weigh 0.025 moles of chromium nitrate, 0.025 moles of glycine and 0.0375 moles of carbon source, dissolve various raw materials in deionized water to prepare a mixed solution, and place the solution on a temperature-controlled electric furnace for heating. After the solution undergoes a series of reactions such as volatilization, concentration and decomposition, a precursor powder is obtained, and the precursor powder is reacted at 900° C. under an argon atmosphere for 2 hours to obtain a chromium carbide / carbon nanocomposite material.

Embodiment 2

[0017] Weigh 0.025 moles of chromium chloride, 0.15 moles of glycine, 0.1 moles of carbon source, and 0.025 moles of ammonium nitrate, dissolve various raw materials in deionized water to prepare a mixed solution, and place the solution on a temperature-controlled electric furnace for heating. After the solution undergoes a series of reactions such as volatilization, concentration and decomposition, a precursor powder is obtained, and the precursor powder is reacted at 1000° C. under an argon atmosphere for 1 hour to obtain a chromium carbide / carbon nanocomposite material.

Embodiment 3

[0019] Weigh 0.025 moles of chromium sulfate, 0.125 moles of glycine, 0.0375 moles of carbon source, and 0.15 moles of ammonium nitrate, dissolve them in distilled water to prepare a solution, and place the solution on a temperature-controlled electric furnace for heating. The solution reacts after a series of processes such as volatilization, concentration and decomposition to obtain a precursor powder. The precursor powder is reacted in a furnace at 900° C. under a nitrogen atmosphere for 1.5 hours to obtain a chromium carbide / carbon nanocomposite material.

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Abstract

The invention relates to a preparation method of a chromium carbide / carbon nano composite material with a mesoporous structure and belongs to the technical field of composite material preparation.The preparation method includes: (1), mixing chromium source, glycine and additives (carbon source, ammonium nitrate and the like) according to a certain proportion to form a solution; (2), heating while stirring, and decomposing after volatilizing and concentrating the solution to obtain precursor powder; (3), subjecting the precursor powder to reaction for 0.5-2 h within a temperature range of 700-1200 DEG C in certain protection atmosphere.The preparation method is simple in process, low in cost and easy for industrial production, and the chromium carbide / carbon nano composite material obtained by the method is uniform in particle distribution and high in dispersity.

Description

Technical field [0001] The invention belongs to the technical field of composite material preparation, and specifically relates to a method for producing a chromium carbide / carbon nano composite material with a mesoporous structure. Background technique [0002] Transition metal carbides have been widely used in the fields of optics, electronics and magnetism due to their unique physical, chemical and structural properties. In particular, the high catalytic activity and selectivity of transition metal carbide materials have attracted widespread attention. It will become a new type of catalyst widely used in petrochemicals, automobile exhaust gas treatment and other fields. In various chemical reactions, transition Metal carbides exhibit good catalytic activity, and their excellent catalysis, electrocatalysis, and their replacement of precious metals as catalytic materials have received extensive attention. Studies have found that transition metal carbides have catalytic effects ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/30
CPCC01P2002/72
Inventor 秦明礼张德印贾宝瑞曹知勤曲选辉
Owner UNIV OF SCI & TECH BEIJING
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