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Metal atom loaded nano composite material and preparation method thereof

A technology of nanocomposite materials and metal atoms, applied in the field of nanocomposite materials supported by metal atoms and its preparation, can solve the problems of high cost of composite materials, easy aggregation of metal atoms, difficult industrial production, etc., to achieve improved performance and uniform distribution of atoms , the effect of high utilization rate

Active Publication Date: 2021-06-11
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the cost of raw materials and devices for synthesizing atom-supported composite materials by these methods is high, and the metal atoms of the material are easy to agglomerate, have poor dispersion, and the yield is low, so it is difficult to expand to industrial production.

Method used

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  • Metal atom loaded nano composite material and preparation method thereof
  • Metal atom loaded nano composite material and preparation method thereof
  • Metal atom loaded nano composite material and preparation method thereof

Examples

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preparation example Construction

[0028] see figure 1 , a method for preparing a metal atom-supported nanocomposite material by chemical vapor deposition according to an embodiment of the present invention, comprising the following steps:

[0029] Step 1, using melamine as nitrogen source and carbon source and L-cysteine ​​at a certain mass ratio and mixing in a ball mill for one hour, and mixing the two powders evenly;

[0030] Step 2: Put the mixed powder in a crucible, cover it with a ceramic piece, put it into a tube furnace, raise the temperature to 500°C-600°C at a certain heating rate in an inert gas atmosphere, and keep it warm for a certain period of time to obtain block, Lightly sulfur-doped C with low density 3 N 4 carrier;

[0031] Step 3, the resulting sulfur-doped C 3 N 4 Use a ball mill to make powder;

[0032] Step 4, the sulfur-doped C 3 N 4 Place them on the upstream and downstream of the air flow in the crucible respectively, and cover with ceramic tiles, so that C 3 N 4 Leave a ga...

Embodiment 1

[0042] see Figure 1 to Figure 5 , a method for preparing a metal atom-supported nanocomposite material according to an embodiment of the present invention, comprising the following steps:

[0043] Mix 8.00g melamine and 2.00g L-cysteine ​​in a ball mill for one hour, and mix the two powders evenly; then put the mixed powder in a crucible and cover it with a ceramic sheet, and heat up at a rate of 2°C / min to 600°C, and keep it warm for 120min, to obtain massive, low-density light sulfur-doped C 3 N 4 . Disperse 500 mg of the prepared material in 250 mL of HNO 3 (0.5mol L -1 ) in ultrasonic dispersion. Add 3.125mL of GO dispersion (1mg mL -1 ) and stirred for 6h to obtain a homogeneous dispersion. The final product was collected by filtration, washed three times with deionized water and ethanol, respectively, and then dried in a freeze dryer for 12 h to obtain the precursor.

[0044] Put ferrocene with a mass ratio of 5% on the side of the precursor, cover the crucible ...

Embodiment 2

[0047] A method for preparing a metal atom-supported nanocomposite material according to an embodiment of the present invention includes: dispersing and depositing metal atoms in the form of isolated or atomic clusters on a nano-carbon-based material carrier and carbonizing them under an inert gas atmosphere to obtain Nanocomposites supported by metal atoms;

[0048] Wherein, the metal atom is an iron atom.

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Abstract

The invention belongs to the technical field of nano composite materials, relates to the field of preparation of metal atom loaded nano composite materials through chemical vapor deposition, and discloses a metal atom loaded nano composite material and a preparation method thereof. The preparation method of the metal atom loaded nano composite material comprises the steps of dispersing metal atoms in an isolated or atomic cluster form in an inert gas atmosphere, depositing the metal atoms on a nano carbon-based material carrier, and carbonizing the metal atoms to obtain the metal atom loaded nano composite material. According to the invention, the metal atom loaded nano composite material with uniform atom distribution and strong binding capacity is prepared; and in the preparation process, tedious physical and chemical treatment steps and reagent and instrument cost in previous synthesis are avoided, and mass production in the industry can be realized.

Description

technical field [0001] The invention belongs to the technical field of nanocomposite materials, and relates to the field of nanocomposite materials supported by metal atoms prepared by chemical vapor deposition, in particular to a nanocomposite material supported by metal atoms and a preparation method thereof. Background technique [0002] Heteroatom-doped carbon materials, such as nitrogen-doped, sulfur-doped, boron-doped, and iodine-doped carbon nanotubes and composites such as graphene, have been widely used in electrocatalysis, environmental monitoring, and biotransmission by using various innovative synthesis strategies. Sense and so on play a role. Nanocomposites supported by metal atoms have better stability, activity and selectivity than conventional nanomaterials; All metal components exist in the form of single-atom dispersion, and there is no metal-metal bond, or when multiple metals are loaded, there is no metal bond between the same metal. [0003] The prepar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/15C23C14/18C23C14/24C23C16/18
CPCC01B32/15C23C16/18C23C14/18C23C14/24
Inventor 谭强李晓航何玉婷段玉娥宋媛媛柳永宁
Owner XI AN JIAOTONG UNIV
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