Fluorine-doped nano-tantalum carbide/graphitized carbon composite material and preparation method thereof

A technology of nano-tantalum carbide and graphitized carbon, which is applied in chemical instruments and methods, nanotechnology, nanotechnology, etc., can solve the problems that tantalum pentachloride is prone to hydrolysis and is not suitable for synthesizing precursors, etc., to alleviate the energy crisis, Easy to achieve large-scale production and abundant raw material sources

Inactive Publication Date: 2014-08-13
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, tantalum salts exist in relatively few forms, and tantalum pentachloride is easily hydrolyzed, which is not suitable for use as a synthetic precursor, so no method for synthesizing nano-tantalum carbide has been reported.

Method used

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  • Fluorine-doped nano-tantalum carbide/graphitized carbon composite material and preparation method thereof
  • Fluorine-doped nano-tantalum carbide/graphitized carbon composite material and preparation method thereof
  • Fluorine-doped nano-tantalum carbide/graphitized carbon composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035](1) Soak the macroporous basic acrylic anion resin with 1 mol / L hydrochloric acid for 10 hours, then wash it with deionized water, and mix it with 1 mol / L sodium hypochlorite and 1 mol / L sodium hydroxide (2) Dissolve 0.82 g of sodium hexanitrocobaltate in 1000 mL of deionized water, then add 10 g of the treated macroporous basic acrylic anion resin, and stir magnetically for 6 hours, the metal ion exchanged resin was obtained; (3) the metal ion exchanged resin in step (2) was washed with deionized water, filtered, and dried; (4) the resin in step (3) was mixed with 0.39 g fluorine Potassium tantalate was added to 1000 mL deionized water together, and stirred for 2 hours; (5) The resin exchanged with metal ions in step (4) was washed with deionized water, filtered, and dried; (6) The resin in step (5) was dried A good resin was heated in a tube furnace at a rate of 5 °C / min to 1100 °C for 1 hour with a nitrogen flow rate of 20 mL / min. (7) After the heat-treated sample wa...

Embodiment 2

[0037] (1) Soak the macroporous basic acrylic anion resin with 1 mol / L hydrochloric acid for 10 hours, then wash it with deionized water, and mix it with 1 mol / L sodium hypochlorite and 1 mol / L sodium hydroxide (2) Dissolve 0.84 g of potassium ferrocyanide in 100 mL of deionized water, then add 10 g of the treated macroporous basic acrylic anion resin, and stir magnetically for 6 hours; (3) Wash the resin exchanged with metal ions in step (2) with deionized water, filter, and dry; (4) add the resin in step (3) together with 0.39 g of potassium fluorotantalate into 1000 mL of deionized water , heated to boiling, and stirred for 2 hours; (5) Wash the resin exchanged with metal ions in step (4) with deionized water, filter, and dry; (6) Dry the resin in step (5) in a tube furnace The heating rate was increased to 1100 °C at a rate of 10 °C / min, and the heat treatment was carried out for 1 hour with a nitrogen flow rate of 20 mL / min. (7) After the heat-treated sample was ball mil...

Embodiment 3

[0039] (1) Soak the macroporous basic acrylic anion resin with 1 mol / L hydrochloric acid for 10 hours, then wash it with deionized water, and mix it with 1 mol / L sodium hypochlorite and 1 mol / L sodium hydroxide (2) Dissolve 4.12 g of sodium hexanitrocobaltate in 100 mL of deionized water, then add 10 g of the treated macroporous basic acrylic anion resin, and stir magnetically for 6 hours; (3) The resin exchanged with metal ions in step (2) was washed with deionized water, filtered, and dried; (4) The resin in step (3) was added to 100 mL together with 19.61 g of potassium fluorotantalate In deionized water, heat to boiling and stir for 2 hours; (5) wash, filter and dry the resin exchanged with metal ions in step (4) with deionized water; (6) dry the resin in step (5) in In a tube furnace, the temperature was raised to 1100 °C at a rate of 8 °C / min, and the heat treatment was performed for 1 hour, with a nitrogen flow rate of 20 mL / min. (7) After the heat-treated sample was b...

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Abstract

The invention discloses a fluorine-doped nano-tantalum carbide / graphitized carbon composite material and a preparation method thereof. The preparation method comprises the steps of carrying out ion exchange resin pretreatment and transition metal salt ion exchange, adding potassium fluotantalate into water, stirring, carrying out thermal treatment in the presence of inert gas, and carrying out grinding and acid treatment on obtained materials, so as to obtain the composite material. The preparation method has the advantages that the raw materials are rich in sources and low in costs, and the doped nano-tantalum carbide / graphitized carbon composite material is synthesized at a relatively low temperature, so that the preparation cost is low, the process is simple and convenient, the preparation is rapid, safe and environmental friendly, and the large-scale production is easy to implement; furthermore, the composite material has a utilization potentiality in an anode catalyst of a fuel cell as well as certain active effects for relieving energy crisis, improving air pollution and generalize new energy electric vehicles.

Description

technical field [0001] The invention relates to the field of energy materials, in particular to a fluorine-doped nanometer tantalum carbide / graphitized carbon composite material and a preparation method thereof. Background technique [0002] Fuel cells have attracted more and more attention from researchers because of their great advantages over traditional heat engines in terms of energy efficiency and environmental improvement. Direct liquid fuel cells have become a particularly favored object in the field of research due to the convenience of storage and transportation of liquid fuels compared to hydrogen[ Chem. Rev., 2009 , 109 , 4183]. As a key component of fuel cells, catalysts have long been composed of noble metals such as platinum or materials containing noble metals. As we all know, precious metals such as platinum are expensive due to scarcity of resources and many fields of use. Moreover, with the successful application of fuel cells in electric vehicles and...

Claims

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Application Information

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IPC IPC(8): B01J27/22H01M4/90B82Y30/00
CPCY02E60/50
Inventor 沈培康岳鑫
Owner SUN YAT SEN UNIV
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