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A kind of preparation method of graphene oxide/titanium dioxide nanotube composite material

A technology of titanium dioxide and composite materials, applied in chemical instruments and methods, chemical/physical processes, water treatment of special compounds, etc., can solve problems such as difficult recycling, easy agglomeration of material components, poor dispersion, etc., to achieve convenient operation, High mechanical strength and strong adsorption performance

Inactive Publication Date: 2018-01-12
SOUTHWEAT UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The present invention aims to overcome the problems in the prior art that material components are easy to agglomerate, have poor dispersion, and are difficult to recycle and reuse, and provide a method for preparing a composite material of graphene oxide and titanium dioxide nanotubes in a macroscopic block

Method used

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  • A kind of preparation method of graphene oxide/titanium dioxide nanotube composite material
  • A kind of preparation method of graphene oxide/titanium dioxide nanotube composite material
  • A kind of preparation method of graphene oxide/titanium dioxide nanotube composite material

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Embodiment 1

[0036] A preparation method of graphene oxide / titanium dioxide nanotube composite material, comprising the following steps:

[0037] Step 1. Take 0.5g of titanium dioxide powder and add it to 50mL of 10M sodium hydroxide solution. Ultrasound for 1h and then stir for 1h to make it fully mixed. Transfer the suspension to a polytetrafluoroethylene reactor and react at 130°C for 24h. After cooling to room temperature, the reaction product was washed three times with water-acid wash-washed to neutrality, then dried and ground to obtain titanium dioxide nanotubes;

[0038] Get titanium dioxide nanotube 5g and 1-ethyl-3-methyl imidazole chloride 0.5g, add 100g distilled water, stir 7 days with 300r / min, obtain titanium dioxide nanotube dispersion liquid, then titanium dioxide nanotube dispersion liquid is in 4000r Centrifuge at a speed of 10 min for 10 min, and take the upper turbid liquid for later use;

[0039] Step 2. Add chitosan to 2wt% glacial acetic acid at room temperature, ...

Embodiment 2

[0043] A preparation method of graphene oxide / titanium dioxide nanotube composite material, comprising the following steps:

[0044] Step 1. Take 0.7g of titanium dioxide powder and add it to 70mL of 10M sodium hydroxide solution. Ultrasound for 1h and then stir for 1h to make it fully mixed. Transfer the suspension to a polytetrafluoroethylene reactor and react at 130°C for 24h. After cooling to room temperature, the reaction product was washed three times with water-acid wash-washed to neutrality, then dried and ground to obtain titanium dioxide nanotubes;

[0045] Get titanium dioxide nanotube 1g and 1-ethyl-3-methylimidazole chloride 0.3g, add 100g distilled water, stir 7 days with 300r / min, obtain titanium dioxide nanotube dispersion liquid, then titanium dioxide nanotube dispersion liquid is in 3000r Centrifuge at a speed of 10 min for 10 min, and take the upper turbid liquid for later use;

[0046] Step 2. Add chitosan to 2wt% glacial acetic acid at room temperature, s...

Embodiment 3

[0050] A preparation method of graphene oxide / titanium dioxide nanotube composite material, comprising the following steps:

[0051] Step 1. Take 1g of titanium dioxide powder and add it to 80mL of 10M sodium hydroxide solution. Ultrasound for 1h and then stir for 1h to make it fully mixed. Transfer the suspension to a polytetrafluoroethylene reactor and react at 130°C for 24h. The reaction is complete. After cooling to room temperature, the reaction product was washed three times with water-acid wash-washed to neutrality, then dried and ground to obtain titanium dioxide nanotubes;

[0052] Get titanium dioxide nanotube 3g and 1-ethyl-3-methyl imidazole chloride 0.5g, add 100g distilled water, stir 7 days with 300r / min, obtain titanium dioxide nanotube dispersion liquid, then titanium dioxide nanotube dispersion liquid is in 4000r Centrifuge at a speed of 10 min for 10 min, and take the upper turbid liquid for later use;

[0053] Step 2. Add chitosan to 2wt% glacial acetic ac...

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Abstract

The invention discloses a method for preparing a graphene oxide / titanium dioxide nanotube composite material. The method adopts a uniformly dispersed graphene oxide aqueous solution prepared by an improved Hummer method and chitosan-modified titanium dioxide nanotubes, which are fully mixed and stirred. A hydrothermal reaction is carried out to form a three-dimensional macro structure in which titanium dioxide nanotubes are evenly distributed on the surface of layered graphene oxide. The graphene oxide / titanium dioxide nanotube composite material is obtained by low-temperature freeze-drying, and then N-doped is performed through heat treatment in an NH3 atmosphere to prepare Macroscale composite materials with photocatalytic properties were obtained. The preparation method of the present invention is simple and easy to implement, has good repeatability, is easy to obtain raw materials, has low preparation cost, is very suitable for preparing macro-scale adsorption and photocatalytic materials, and is expected to obtain important applications in the fields of water pollution treatment such as heavy metals and printing and dyeing wastewater. .

Description

technical field [0001] The invention relates to the technical field of preparation of adsorption materials and photocatalytic degradation materials, in particular to a method for preparing a graphene oxide / titanium dioxide nanotube composite material Background technique [0002] Graphene oxide is a two-dimensional crystal that is exfoliated from graphite and is composed of carbon atoms with a thickness of only one atom. Its lattice is a hexagon surrounded by six carbon atoms, and its thickness is one atomic layer. The atoms in the graphene layer are all surface atoms, and its surface area is very large, which is a natural adsorption material. Its advantages such as easy preparation and low cost make graphene adsorption materials become a hot spot in water treatment research. Graphene and its composite materials have been applied in the treatment of heavy metals, dyes, pesticides, antibiotics, petroleum and other pollutants. N-doping graphene can make it have excellent pho...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/20B01J20/30C02F1/30C02F1/28B01J21/18B01J21/06B01J35/02C02F101/30B01J35/00
CPCB01J20/06B01J20/20C02F1/288C02F1/30B01J21/063B01J21/18C02F2101/30C02F2305/10B01J35/00B01J35/30B01J35/39
Inventor 竹文坤段涛姚卫棠张友魁
Owner SOUTHWEAT UNIV OF SCI & TECH
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