Preparation method of hollow mesoporous Ti4O7@C nanospheres with large specific surface areas

A large specific surface area, hollow mesoporous technology, applied in nanotechnology for materials and surface science, carbon preparation/purification, nanotechnology, etc., can solve the problems of small specific surface area and grain coarsening of composite materials, To achieve the effect of shortening the reaction time, short reaction time and speeding up the reaction rate

Active Publication Date: 2018-08-10
SHAANXI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, severe grain coarsening often occurs during high-temperature reduction, resulting in the obtained Ti 4 o 7 @C Composite materials have smaller specific surface area
Therefore, Ti with a large specific surface area is obtained 4 o 7 @C Composites are very challenging

Method used

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  • Preparation method of hollow mesoporous Ti4O7@C nanospheres with large specific surface areas
  • Preparation method of hollow mesoporous Ti4O7@C nanospheres with large specific surface areas
  • Preparation method of hollow mesoporous Ti4O7@C nanospheres with large specific surface areas

Examples

Experimental program
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Effect test

Embodiment 1

[0033] 1. Preparation of TiO 2 @C nanosphere

[0034] Add 30mg of hollow mesoporous carbon spheres with an average particle size of 200nm and a wall thickness of 40nm into 35mL of absolute ethanol, ultrasonically disperse at room temperature for 30 minutes, then add 0.32g of cetylamine and 0.8g of ammonia water with a mass concentration of 25% , stirred at room temperature for 15 minutes, then added 0.2 g titanium isopropoxide dropwise, continued to stir for 1 hour, and washed twice with deionized water to obtain TiO 2 @C nanospheres.

[0035] 2. Preparation of PDA@TiO 2 @C nanosphere

[0036] 0.1g TiO 2 @C nanospheres were added to 55 mL of Tris alkali-hydrochloric acid buffer solution with a pH of 10, dispersed by ultrasonic at room temperature for 5 minutes, added 0.1 g of dopamine hydrochloride (PDA), stirred at room temperature for 24 hours, centrifuged and washed with deionized water for 3 times, and then washed with Centrifuge and wash twice with water and ethanol,...

Embodiment 2

[0043] In step 1 of this example, 20 mg of hollow mesoporous carbon spheres with an average particle size of 200 nm and a wall thickness of 40 nm were added to 35 mL of absolute ethanol, and ultrasonically dispersed at room temperature for 30 minutes, and then 0.32 g of cetylamine, 0.8 g mass concentration is 25% ammonia water, stir at room temperature for 15 minutes, then dropwise add 0.2g of isopropoxytitanium, continue to stir for 1 hour, and wash twice with deionized water to obtain TiO 2 @C nanospheres. Other steps are identical with embodiment 1, obtain hollow mesoporous Ti 4 o 7 @C nanospheres (see Figure 13 ).

Embodiment 3

[0045] In step 2 of the present embodiment, 0.1g TiO 2 @C nanospheres were added to 55 mL of Tris alkali-hydrochloric acid buffer solution with a pH of 10, dispersed by ultrasonic at room temperature for 5 minutes, added 0.2 g of dopamine hydrochloride (PDA), stirred at room temperature for 24 hours, centrifuged and washed with deionized water for 3 times, and then washed with Centrifuge and wash twice with water and ethanol, and dry at 60°C for 12 hours to obtain PDA@TiO 2 @C nanospheres. Other steps are identical with embodiment 1, obtain hollow mesoporous Ti 4 o 7 @C nanospheres (see Figure 14 ).

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Abstract

The invention discloses a preparation method of hollow mesoporous Ti4O7@C nanospheres with large specific surface areas. The method comprises the steps of enabling amorphous TiO2 to grow in an in-situway by taking hollow mesoporous carbon spheres as a template, and coating the surface of the amorphous TiO2 with a layer of p-phenylenediamine (PDA) to form PDA@ TiO2@C nanospheres having sandwich structures; then, calcining for 15-30min at the temperature of 950 DEG C in an argon environment to obtain the hollow mesoporous Ti4O7@C nanospheres. The preparation method provided by the invention issimple, short in needed reaction time and low in temperature, and can effectively inhibit the grain coarsening of Ti4O7; the obtained Ti4O7@C nanospheres are large in specific surface areas, and havea wide application prospect in the field of lithium-sulfur batteries.

Description

technical field [0001] The invention belongs to the technical field of preparation of mesoporous materials, in particular to a hollow mesoporous Ti material with a large specific surface area 4 o 7 Preparation method of @C nanospheres. Background technique [0002] Ti 4 o 7 Because of its good electrochemical stability, high electrical conductivity (1995S / cm), strong corrosion resistance, strong adsorption of sulfur, environmental protection and non-toxicity, it is used in inert electrodes, fuel cells, lithium-sulfur There have been many researches and applications in the fields of batteries, thermoelectric and photoelectric materials, and photocatalytic degradation. British Atraverda Ltd company uses Ti 4 o 7 mixed with a small amount of Ti 5 o 9 After the registration and commercial sale of Ebonex, a series of patents and research reports on the application of Ebonex in the field of fuel cells appeared. [0003] Currently, the TiO 2 Precursors undergo high-temper...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G23/04C01B32/05B82Y30/00
CPCB82Y30/00C01B32/05C01G23/043C01P2002/72C01P2004/03C01P2004/04C01P2004/80C01P2006/12
Inventor 孙颉王芳史茹月雷志斌刘宗怀
Owner SHAANXI NORMAL UNIV
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