A method of porous carbon supporting metal carbides

A carbide and porous carbon technology, applied in chemical instruments and methods, chemical/physical processes, catalyst carriers, etc., can solve the problems of serious pollution, long synthesis routes, and high cost of template agents, and achieve great application prospects and synthesis routes. Simple, avoid complex effects

Active Publication Date: 2018-10-30
CHANGZHOU YINGZHONG NANO TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method is very mature for the synthesis of silicon-based materials, but the synthesis of carbon materials still needs further research, and this method is not widely applicable to the preparation of various carbon-supported metal / metal oxide composites
[0007] Traditional synthesis methods of porous carbon-loaded nanomaterials often have problems such as long synthesis routes, high cost of template agents, and serious pollution in post-processing, so it is difficult to achieve large-scale production
It is difficult to control the pore structure of the carbon support, as well as the size, composition, crystal phase and loading amount of the metal or metal carbide loaded on it at the same time.
In addition, traditional synthesis methods cannot be widely used in the preparation of various nano-metal carbides due to the limitation of preparation methods.

Method used

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  • A method of porous carbon supporting metal carbides
  • A method of porous carbon supporting metal carbides
  • A method of porous carbon supporting metal carbides

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Example 1: Mo supported on porous carbon 2 C

[0026] Synthetic raw materials: glucose, urea, ammonium molybdate

[0027] (1) Weigh 1 g glucose, 0.01 g urea and 0.1 g H 24 Mo 7 N 6 o 24 4H 2 O in a 100 mL beaker, then grind the medicine in the beaker with a mortar for 20 minutes to make it even, and form a molten state at a certain temperature;

[0028] (2) Put the mixture described in (1) in the crucible and place it in a tube furnace, and put the sample at 800°C, N 2 Calcined for 5 hours under the same conditions to obtain a dark brown bulky solid, which was measured by XRD as porous carbon supported molybdenum carbide (Mo 2 C).

Embodiment 2

[0029] Example 2: Mo supported on porous carbon 2 C

[0030] Synthetic raw materials: glucose, urea, ammonium molybdate

[0031] (1) Weigh 0.02 g glucose, 2 g urea and 0.2 g H 24 Mo 7 N 6 o 24 4H 2 O in a 100 mL beaker, then grind the medicine in the beaker with a mortar for 30 minutes, and then heat it to form a molten state;

[0032] (2) Put the mixture described in (1) in the crucible and place it in a tube furnace. Put the sample at 800°C, N 2 Calcined under the conditions for 6 hours, to obtain dark brown bulky solid, recorded XRD is porous carbon supported molybdenum carbide (Mo 2 C), showing that the carbide particle size of the sample is about 6nm.

Embodiment 3

[0033] Example 3: Mo supported on porous carbon 2 C

[0034] Synthetic raw materials: glucose, urea, ammonium molybdate

[0035] (1) Weigh 0.03 g glucose, 0.3 g urea and 3 g H 24 Mo 7 N 6 o 24 4H 2 O in a 100 mL beaker, heated and stirred to form a molten state;

[0036] (2) Put the mixture described in (1) in the crucible and place it in a tube furnace. Put the sample at 800°C, N 2 Calcined under the conditions for 6 hours, to obtain dark brown bulky solid, recorded XRD is porous carbon supported molybdenum carbide (Mo 2 C).

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Abstract

The inventiondiscloses a method for preparing porous carbon supported metal carbide, and belongs to the technical field of nano-material preparation. The method utilizes the characteristic that a uniformly mixed system can be formed between an ammonium salt, a nitride or a saccharide and a metal salt, and comprises the following steps: carrying out dehydration and carbonization to form porous carbon in situ; carrying out high-heat treatment to ensure that metal is converted into a carbide, namely the porous carbon supported metal carbide material. Through change of synthesis conditions such as raw material ratio, reaction time and heat treatment temperature, the capacity, the particle size and the composition of the obtained supported nanomaterial can be controlled simultaneously. The method has the advantages that the whole process is simple to operate and easy to apply; the cost is low; the raw materials are rich and easy to get; the obtained porous carbon supported metal carbide material is wide in application prospect in various fields such as industrial catalysis, water treatment and electrochemistry.

Description

technical field [0001] The invention provides a method for porous carbon supporting transition metal carbides, which belongs to the technical field of nanometer material preparation. It has shown excellent catalytic performance in catalytic hydrogenation and dehydrogenation reactions, isomerization and aromatization of hydrocarbons, and electrocatalysis. Background technique [0002] Nanomaterials refer to solid materials composed of extremely fine grains with characteristic dimensions on the order of nanometers (~100nm). Nanomaterials have many properties that conventional materials do not have, including optical properties, electromagnetic properties, thermodynamic properties, quantum mechanical properties, etc. Due to these properties, nanomaterials are widely used in lubrication, optoelectronics, magnetic recording, catalysis and other fields. However, due to their high surface energy, nanoparticles are very prone to spontaneous aggregation, which greatly limits the nan...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/22B01J32/00B01J35/10
Inventor 姜兴茂任婧张震威王非梁帅陆伟吴越孙玉妍
Owner CHANGZHOU YINGZHONG NANO TECH
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