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Synthesis method of Mo-coated Mo2C nano composite material

A technology of composite materials and synthesis methods, which is applied in the direction of nanotechnology, nanotechnology, chemical instruments and methods, etc., can solve the problems that are not conducive to the stability of catalytic reaction materials, the inapplicability of reduced metals, the binding force of second phase metals and molybdenum carbide carriers Weakness and other problems, to achieve the effect of low cost, low equipment requirements, and more active sites

Pending Publication Date: 2022-07-05
CHINA THREE GORGES UNIV
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  • Description
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Problems solved by technology

Obviously, this method can only be used for soluble nitrate metals that are easily reduced, but not for insoluble metal salts and hard-to-reduce metals
Moreover, the binding force between the second phase metal prepared by this method and the molybdenum carbide support is weak, which is not conducive to the stability of the catalytic reaction material.

Method used

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  • Synthesis method of Mo-coated Mo2C nano composite material
  • Synthesis method of Mo-coated Mo2C nano composite material
  • Synthesis method of Mo-coated Mo2C nano composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Weigh 1 g of ammonium molybdate and 0.5 g of citric acid into a ball mill, then add 250 g of grinding balls, and after sealing, ball mill for 3 hours at 200 rpm, 400 rpm, 600 rpm, 800 rpm, and 1000 rpm, respectively, to obtain Mix well mixture. Then, the mixed powder was first kept at 175 °C for 1 h in an Ar atmosphere, and then heated to 800 °C for 2 h to obtain Mo@Mo 2 C composite nanomaterials, named Mo@Mo 2 C-2, Mo@Mo 2 C-4, Mo@Mo 2 C-6, Mo@Mo 2 C-8, Mo@Mo 2 C-10.

[0024] Dissolve 16.2 mmol of cadmium nitrate and 48.6 mmol of thiourea in 80 ml of ethylenediamine and stir to obtain a clear pale green solution. The solution was then placed in a 50ml PTFE liner, sealed, heated in an oven at 160 °C for 24 h, centrifuged after natural cooling, rinsed with deionized water, and dried in a vacuum oven at 80 °C for 12 h. Finally, the bright yellow CdS photocatalytic material was collected.

[0025] 80 mg of the as-prepared CdS photocatalytic material was taken, and ...

Embodiment 2

[0027] Weigh 1 g of ammonium molybdate and 1 g of citric acid into a ball mill, then add 500 g of grinding balls, seal and ball-mill at 600 rpm for 3 hours to obtain a well-mixed mixture. Then, the mixed powder was first kept at 175 °C for 1 h in an Ar atmosphere, and then heated to 800 °C for 2 h to obtain Mo@Mo 2 C composite nanomaterials. Mo@Mo 2 XRD diffraction pattern of C composite nanomaterials ( figure 1 ) confirmed that the prepared composite nanomaterials contained metallic Mo and Mo 2 C two materials. Scanning electron microscope such as figure 2 As can be seen from the figure, the composite material is nanoscale.

[0028] Take 2 ml of 0.5 mol / L ZnCl 2 Solution, 4 ml of 0.5 mol / L InCl 3 The solution was mixed in the ethanol solution of 14ml, and the thioacetamide of 0.3g was added with stirring, and then the mixed solution was placed in the reactor at 120 ° C and reacted for 12h. Finally, light yellow ZnIn was obtained. 2 S 4 catalytic material.

[0029]...

Embodiment 3

[0031] Weigh 1 g of ammonium molybdate and 1 g of citric acid into a ball mill, then add 500 g of grinding balls, seal and ball-mill at 600 rpm for 3 hours to obtain a well-mixed mixture. Then, the mixed powder was first kept at 150 °C for 1 h in an Ar atmosphere, and then heated to 850 °C for 2 h to obtain Mo@Mo 2 C composite nanomaterials.

[0032] will get Mo@Mo 2 C composite nanomaterial and ZnIn obtained in Example 2 2 S 4 Photocatalytic materials according to Mo@Mo 2 The proportion of C mass percentage of 20% was mixed and used for the photocatalytic hydrogen production performance test. The mixing process and the photocatalytic hydrogen production process were the same as those in Example 2. The photocatalytic hydrogen production activity of the composite is 986.2 μmol h −1 g −1 , is pure ZnIn 2 S 4 39 times more.

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Abstract

The invention discloses a synthesis method of a Mo-coated Mo2C nano composite material, and belongs to the field of nano material preparation. A one-step synthesis method is adopted, inorganic Mo salt and an organic carbon source are subjected to ball milling and mixing, the ratio of the inorganic Mo salt to the organic carbon source is adjusted, and the Mo-coated Mo2C composite material is obtained through high-temperature pyrolysis reduction under a specific gradient. Compared with an existing hydrothermal method and a high-temperature smelting method, the Mo-coated Mo2C composite material is prepared through a one-step synthesis method, and the method is simple in process, economical, environmentally friendly and suitable for batch production. Meanwhile, the prepared Mo-coated Mo2C composite material has relatively good dispersity and relatively large specific surface area, and has a very good application prospect in the field of catalysis.

Description

technical field [0001] The present invention relates to a Mo@Mo 2 A preparation method and application of C composite nanomaterials belong to the field of nanomaterial preparation. Background technique [0002] Molybdenum carbide is an interstitial alloy compound formed after C atoms are doped into the lattice of metal Mo. The incorporation of C atoms makes the atomic lattice of the parent metal Mo expand, the d-band shrinks, and the Fermi level density of states increases. So that it has the characteristics of group VIII noble metals. At present, molybdenum carbide materials have performances similar to or even better than those of noble metal materials in the fields of electrocatalytic hydrogen evolution, catalytic hydrodehydrogenation, batteries and supercapacitors. In addition, molybdenum carbide has good stability, low cost, and anti-poisoning capabilities, and has great application prospects in the field of catalysis. [0003] At present, the synthesis methods of mo...

Claims

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Application Information

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IPC IPC(8): B01J27/22B01J37/08C01B3/04B01J37/16B82Y30/00B82Y40/00H01M4/36
CPCB01J27/22B01J37/0036B01J37/082B01J37/16C01B3/042B82Y30/00B82Y40/00H01M4/362B01J35/394B01J35/33B01J35/39Y02E60/36
Inventor 乔秀清王紫昭李晨侯东芳李东升
Owner CHINA THREE GORGES UNIV
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