Preparation method of titanium dioxide/graphene composite material

A technology of titanium dioxide and composite materials, applied in chemical instruments and methods, nanotechnology for materials and surface science, chemical/physical processes, etc., can solve the problems of low photocatalytic efficiency and large particle size of titanium dioxide, and achieve photocatalytic High efficiency, reduced recombination rate, and high catalytic activity

Inactive Publication Date: 2014-01-01
上海梦泺企业管理咨询有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Purpose of the present invention is exactly to overcome existing TiO 2 The defects of large particle size and low photocatalytic efficiency of titanium dioxide in / graphene composite materials provide a new preparation method of titanium dioxide / graphene composite materials

Method used

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  • Preparation method of titanium dioxide/graphene composite material
  • Preparation method of titanium dioxide/graphene composite material
  • Preparation method of titanium dioxide/graphene composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Mix 0.5g of colloidal graphite (with a particle size of 0.5-1μm) and 10g of benzoyl peroxide thoroughly and grind them evenly. Heat the mixed powder in a steel explosion-proof container at 110°C for 10 minutes. After the reaction, cool naturally to room temperature, add 100mL of water, ultrasonicate for 1 hour, add 5mL of ascorbic acid aqueous solution (25% by mass) and 15mL of titanium An aqueous tetrabutyl ester solution (mass fraction of 7%) was reacted in a hydrothermal reactor at 160°C for 5 hours. After the hydrothermal reaction, centrifuge, wash with water and isopropanol in sequence, and dry at 80° C. for 10 hours to obtain a relatively pure titanium dioxide / graphene composite material.

[0031] figure 1 TEM photographs of the titanium dioxide / graphene composite material (a) prepared in Example 1 and the reference product graphite oxide (b). from figure 1 In (a), it can be seen that the surface of graphene is covered with dense and uniformly dispersed TiO 2 ...

Embodiment 2

[0033] Mix 0.5g of colloidal graphite (0.1-1μm in particle size) and 9g of tert-butyl hydroperoxide thoroughly and grind them evenly. Heat the mixed powder in a steel explosion-proof container at 120°C for 20 minutes. After the reaction, cool down to room temperature naturally, add 100mL of water, ultrasonicate for 1.5 hours, and add 5mL of diethylene glycol diacrylate aqueous solution with stirring (mass fraction 30%) and 20mL isopropyl titanate aqueous solution (mass fraction 8%) were reacted in a hydrothermal reactor at 190°C for 4 hours. After the hydrothermal reaction, centrifuge, wash with water and isopropanol in sequence, and dry at 90° C. for 10 hours to obtain a relatively pure titanium dioxide / graphene composite material.

[0034] The TEM photograph of the composite material that the present embodiment makes is similar to embodiment 1, and its TiO 2 The average particle size of the particles is about 15nm.

Embodiment 3

[0036] Mix 0.5g of natural flake graphite and 10g of benzoyl peroxide thoroughly and grind them evenly. Heat the mixed powder in a steel explosion-proof container at 120°C for 25 minutes. After the reaction, cool naturally to room temperature, add 100mL of water, ultrasonicate for 1 hour, add 5mL of hydrazine hydrate aqueous solution (20% by mass) and 15mL of Tetrabutyl titanate aqueous solution (mass fraction: 7%) was reacted in a hydrothermal reactor at 180°C for 5 hours. After the hydrothermal reaction, centrifuge, wash with water and isopropanol in sequence, and dry at 80° C. for 10 hours to obtain a relatively pure titanium dioxide / graphene composite material.

[0037] The TEM photograph of the composite material that the present embodiment makes is similar to embodiment 1, and its TiO 2 The average particle size of the particles is about 5nm.

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Abstract

The invention discloses a preparation method of a titanium dioxide/graphene composite material. The preparation method comprises the following steps: heating a mixture of graphite and peroxide, adding water, applying ultrasonic, mixing with a reducer water solution and a titanium salt precursor water solution, and carrying out hydrothermal reaction, wherein the reducer is hydrazine hydrate, p-phenylene diacrylate, glucose or ascorbic acid. The preparation method disclosed by the invention can adopt one-step reaction, and is simple to operate; and the prepared composite material has high photocatalytic efficiency.

Description

technical field [0001] The invention relates to a preparation method of a titanium dioxide / graphene composite material. Background technique [0002] Graphene is a special honeycomb monoatomic layer formed by the close packing of carbon atoms. It is a two-dimensional planar material that can exist stably at room temperature. It has attracted much attention because of its unique thermal, mechanical and electrical properties. The research on graphene is not limited to the theoretical level, and it has been applied to the preparation of various devices, including low-energy and high-density electronic devices and sensor devices. [0003] It is well known that TiO 2 The photocatalytic activity is largely affected by its particle size and specific surface area. TiO with a particle size in the nanoscale range 2 , its catalytic activity will be significantly improved; and using the huge specific surface area of ​​graphene, TiO 2 / graphene composites can further enhance the cata...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J21/18B82Y30/00C02F1/30
Inventor 钦琛
Owner 上海梦泺企业管理咨询有限公司
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