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

A nanometer tantalum carbide and graphitized carbon technology, applied in chemical instruments and methods, nanotechnology, nanotechnology, etc., can solve the problems of tantalum pentachloride easily hydrolyzed and not suitable for synthesizing precursors, etc., so as to alleviate the energy crisis, The effect of low price and simple process

Inactive Publication Date: 2016-08-24
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
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Effect test

Embodiment 1

[0033](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

[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 0.84 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

[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 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 nanometer tantalum carbide / graphitized carbon composite material and a preparation method thereof. The preparation method includes: ion exchange resin pretreatment, transition metal salt ion exchange, stirring with potassium fluorotantalate in water, heat treatment in an inert gas atmosphere, and then crushing and acid treatment of the obtained material to obtain the present invention. of composite materials. The method of the present invention has abundant sources of raw materials and low prices, and synthesizes doped nano-tantalum carbide / graphitized carbon composite materials at a relatively low temperature, so the preparation cost is low, and the process is simple, fast, safe, environmentally friendly, and Easy to realize large-scale production. Moreover, the material synthesized by the invention has the application potential in fuel cell anode catalysts, and has a certain positive effect on alleviating the energy crisis, improving air pollution, and popularizing 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 t...

Claims

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Application Information

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