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Nano titanium dioxide/graphene oxide composite material and preparation method and application thereof

A nano-titanium dioxide and composite material technology, applied in the field of nano-titanium dioxide/graphene oxide composite material and its preparation, can solve the problems of low photocatalytic efficiency and small specific surface area, and achieve high photocatalytic efficiency, large specific surface area and obvious effect. Effect

Inactive Publication Date: 2016-05-11
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In order to solve the shortcomings and deficiencies of the prior art, overcome the existing TiO 2 / graphene composite material specific surface area is small, the defect of low photocatalytic efficiency, the primary purpose of the present invention is to provide a kind of preparation method of efficient nano-titanium dioxide / graphene oxide composite material

Method used

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  • Nano titanium dioxide/graphene oxide composite material and preparation method and application thereof

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Embodiment 1

[0020] A preparation method of nano-titanium dioxide / graphene oxide composite material, comprising the following steps:

[0021] 40 mg of graphene oxide solid was dissolved in 40 mL of deionized water and 4 mL of absolute ethanol, and ultrasonically treated for 30 min. Then add 0.28g of nano-titanium dioxide, stir at a speed of 200r / min for 1h to make it evenly mixed; then place the obtained suspension in a stainless steel reactor, maintain the temperature at 100°C for 1h; finally, regenerate it by filtering and air-drying Nano-titanium dioxide / graphene oxide composite.

Embodiment 2

[0023] A preparation method of nano-titanium dioxide / graphene oxide composite material, comprising the following steps:

[0024] 50 mg of graphene oxide solid was dissolved in 30 mL of deionized water and 6 mL of absolute ethanol, and ultrasonically treated for 60 min. Then add 0.40g of nano-titanium dioxide, stir at a speed of 250r / min for 2h to make it evenly mixed; then place the obtained suspension in a stainless steel reactor, maintain the temperature at 110°C for 2h; finally, regenerate it by filtering and air-drying Nano-titanium dioxide / graphene oxide composite.

Embodiment 3

[0026] A preparation method of nano-titanium dioxide / graphene oxide composite material, comprising the following steps:

[0027] 60 mg of graphene oxide solid was dissolved in 12 mL of deionized water and 12 mL of absolute ethanol, and ultrasonically treated for 90 min. Then add 0.54g of nano-titanium dioxide, stir at a speed of 300r / min for 3h to make it evenly mixed; then place the obtained suspension in a stainless steel reactor, maintain the temperature at 120°C for 3h; finally, regenerate it by filtering and air-drying Nano-titanium dioxide / graphene oxide composite.

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Abstract

The invention belongs to the field of functional materials and discloses nano titanium dioxide / graphene oxide composite material and a preparation method and application thereof. The preparation method includes: allowing solid graphene oxide to react with deionized water, anhydrous ethanol and nano titanium dioxide, and performing filtration and air drying regeneration to obtain the nano titanium dioxide / graphene oxide composite material. The nano titanium dioxide / graphene oxide composite material prepared by the method has the advantages that the composite material is large in specific surface area and high in photocatalytic efficiency, the dye absorption performance of the composite material is increased greatly as compared with that of nano titanium dioxide, and the composite material is evident in absorption effect on low-concentration dye (<100mg / L) especially. The preparation method is simple in preparation process and easy to operate.

Description

technical field [0001] The invention belongs to the field of functional materials, and in particular relates to a nano-titanium dioxide / graphene oxide composite material and a preparation method and application thereof. Background technique [0002] Graphene has a six-membered ring carbon structure, and the carbon atoms are separated by sp 2 The hybrid structure is interconnected and closely packed to form a special honeycomb monoatomic layer. Graphene is a two-dimensional planar material with a strength comparable to that of diamond. It is currently the thinnest and hardest material in the world. It also has a huge specific surface area and good electrical and thermal conductivity. Therefore, graphene has broad application prospects in the fields of electronics, information, energy, materials, and biomedicine. [0003] TiO 2 It is a photocatalyst with high efficiency, non-toxicity, stable chemical properties, strong photooxidation resistance and low price. TiO 2 Photoc...

Claims

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Application Information

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IPC IPC(8): B01J21/18B01J21/06B01J20/20B01J20/28C02F1/28C02F1/30C02F101/30
CPCB01J21/18B01J20/06B01J20/205B01J20/28004B01J20/28057B01J21/063C02F1/281C02F1/288C02F1/30C02F2101/308C02F2305/08C02F2305/10
Inventor 杨仁党朱雪换王瑞彬
Owner SOUTH CHINA UNIV OF TECH
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