Preparation method of graphene/TiO2 flower-like nano-clusters

A technology of graphene and nanoclusters, applied in nanotechnology, coatings, surface reaction electrolytic coatings, etc., can solve the problems of ineffective transfer of carriers, low utilization of sunlight, and low conductivity, and achieve increased The effect of photocatalytic efficiency, simple and safe preparation process, and increased specific surface area

Inactive Publication Date: 2013-06-05
SICHUAN AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But TiO 2 There are still two bottlenecks in the application of nanotube arrays in the field of photocatalytic degradation of organic pollution: ①TiO 2 The band gap is wide, the utilization rate of sunlight is low, and it can only absorb the ultraviolet light region accounting for 5% of the total solar energy; ②TiO 2 The electrical conductivity is low, the carriers cannot be effectively transferred, and the photogenerated electrons and holes recombine quickly

Method used

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  • Preparation method of graphene/TiO2 flower-like nano-clusters
  • Preparation method of graphene/TiO2 flower-like nano-clusters

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] (1) Graphene / TiO 2 Preparation of flower-like nanoclusters

[0022] ① Use 320#, 600#, 800#, 1200#, 2000# sandpaper to polish the titanium sheet (a titanium foil with a thickness of 0.3mm, a size of 30mm×40mm, and a purity of 99.99%). Ultrasound in absolute ethanol and high-purity water for 15 minutes, then repeatedly rinse with high-purity water, dry at 55°C, and set aside.

[0023] ② Configure electrolyte: add 5mg graphene to 50ml of 0.1mg / ml magnesium nitrate solution, the mass ratio of graphene to magnesium nitrate is 1:1, ultrasonic for 30min and mix well.

[0024] ③Under the condition of 60V DC voltage, the treated titanium sheet is used as the anode and the platinum wire is used as the cathode. In the above electrolyte, anodize for 2 minutes.

[0025] ④ After the reaction, the titanium flakes are washed repeatedly with deionized water, and then calcined in a muffle furnace at 500°C for 2 hours after drying.

[0026] Graphene / TiO grown on the surface of titanium sheet 2 Flo...

Embodiment 2

[0033] (1) Graphene / TiO 2 Preparation of flower-like nanoclusters

[0034] ①After polishing the titanium sheet with 320#, 600#, 800#, 1200#, 2000# sandpaper in turn, it is sonicated in acetone, absolute ethanol, and high-purity water for 15 minutes, then rinsed repeatedly with high-purity water, and dried at 55°C. ,spare.

[0035] ② Configure the electrolyte: add 2.5 mg of graphene to 50 ml of 0.1 mg / ml magnesium nitrate solution, the mass ratio of graphene to magnesium nitrate is 1:2, and ultrasonic for 30 minutes to mix well.

[0036] ③Under the condition of 70V DC voltage, the treated titanium sheet is used as the anode and the platinum wire is used as the cathode. In the above electrolyte, anodize for 2 minutes.

[0037] ④ After the reaction, the titanium flakes are washed repeatedly with deionized water, and then calcined in a muffle furnace at 500°C for 2 hours after drying.

[0038] Graphene / TiO grown on the surface of titanium sheet 2 Flower-like nano clusters.

[0039] (2) Grap...

Embodiment 3

[0043] (1) Graphene / TiO 2 Preparation of flower-like nanoclusters

[0044] ①After polishing the titanium sheet with 320#, 600#, 800#, 1200#, 2000# sandpaper in turn, it is sonicated in acetone, absolute ethanol, and high-purity water for 15 minutes, then rinsed repeatedly with high-purity water, and dried at 55°C. ,spare.

[0045] ② Configure the electrolyte: add 0.5 mg of graphene to 50 ml of 0.1 mg / ml magnesium nitrate solution, the mass ratio of graphene to magnesium nitrate is 1:10, and ultrasonic for 30 minutes to mix well.

[0046] ③Under the condition of 80V DC voltage, the treated titanium sheet is used as the anode and the platinum wire is used as the cathode. In the above electrolyte, anodize for 2 minutes.

[0047] ④ After the reaction, the titanium flakes are washed repeatedly with deionized water, and then calcined in a muffle furnace at 500°C for 2 hours.

[0048] Graphene / TiO grown on the surface of titanium sheet 2 Flower-like nano clusters.

[0049] (2) Graphene / TiO 2 F...

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Abstract

The invention discloses a preparation method of graphene / TiO2 flower-like nano-clusters. The invention belongs to the fields of new energy materials, electrochemical, photochemical and photoelectrocatalysis. According to the invention, for a first time, a graphene salt solution is adopted as an electrolyte; short-time anodic oxidation is carried out; and the graphene / TiO2 flower-like nano-clusters are prepared. The method is simple, and has the advantages of easy operation, easy-to-control process, low cost, environment friendliness, and good repeatability. The prepared graphene / TiO2 flower-like nano-clusters have wide application prospect, and can be used as photoelectrocatalysis electrode in environmental fields. The nano-clusters can be used in organic wastewater and waste gas degradation through photoelectrocatalysis. The nano-clusters can be used as photoelectrode in fields such as solar cells, or can be used as a hydrogen storage material in the field of novel energy.

Description

Technical field [0001] The invention relates to the preparation of graphene and titanium dioxide composite materials, and belongs to the field of new energy materials and the fields of electrochemistry, photochemistry and photoelectrocatalysis. Background technique [0002] Among many semiconductor materials, TiO 2 It has the characteristics of high photoelectric catalytic efficiency, low cost, easy industrial production, stable performance, and non-toxicity. It provides a purification technology with broad application prospects for the removal of organic pollutants, especially toxic, harmful and difficult-to-degrade organic pollutants. TiO 2 Nanotubes have a special structure of one-dimensional nanomaterials and a hollow tubular structure, so they have a larger specific surface area, stronger adsorption capacity and special physical and chemical properties. But TiO 2 The application of nanotube arrays in the field of photocatalytic degradation of organic pollution still has two ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D11/26B82Y40/00
Inventor 张延宗刘燕母康生黄成毅杨刚邓仕槐沈飞蔺丽丽余小玉彭宏张小洪漆辉
Owner SICHUAN AGRI UNIV
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