A preparing method of a graphene-Au-TiO2 multi-component composite nanotube material

Abstract

A preparing method of a graphene-Au-TiO2 multi-component composite nanotube material is provided. The method includes a step of preparing a raw material mixture, namely a step of weighing available nanometer particles TiO2 and NaOH raw materials according to a mass ratio of 1:8, adding the TiO2 and the NaOH into a corundum crucible, separately weighing graphene powder and a gold compound into the corundum crucible, fully mixing the materials and keeping the mixture for later use; a step of high-temperature melting, namely a step of putting the corundum crucible containing the material mixture at room temperature into a vacuum high-temperature furnace isolated from air, closing the door of the furnace, opening an argon flow valve, feeding argon to remove air in the furnace body, raising the temperature from room temperature to 400-500 DEG C at a temperature raising speed of 5 DEG C / min, melting the raw material mixture, cooling the high-temperature furnace to room temperature, taking the corundum crucible out and stopping argon, with the raw materials forming titanate mixed alkali-melt frit; a step of performing extraction with boiling water; a step of performing hydro-thermal treatment under atmospheric pressure; a precipitating and washing step; and a step of performing calcination to obtain a finished product. The method has characteristics of a low cost, short time, a greatly increased length and stable properties of the prepared nanotubes, and capability of effectively improving photocatalytic properties of the composite nanometer material.

Description

[0001] 【Technical field】 [0002] The invention belongs to a method for preparing nanomaterials, specifically a graphene-Au-TiO 2 The preparation method of multi-component composite nanotube material. [0003] 【Background technique】 [0004] TiO 2 It is an important inorganic functional material, because of its high activity, good stability, no secondary pollution, harmless to the human body and low price, it is widely used in the storage and utilization of solar energy, photoelectric conversion, photochromic and photocatalytic degradation of the atmosphere It has a wide range of applications in fields such as pollutants in water and water. [0005] Since the discovery of carbon nanotubes by Iijima in 1991, it has attracted great interest in the study of nanotube materials. TiO 2 Nanotubes (TNTs) as TiO 2 A form of nanomaterials. Due to its aspect ratio and nanoscale hollow channels, titanium dioxide with a tubular structure can be assembled into a composite nanomaterial ...

AI Technical Summary

Problems solved by technology

The more common preparation method is to avoid high-temperature calcination of graphene-TNTs in order to avoid the formation of carbon oxides, which will affect the crystallinity of TNTs and directly affect the performance of TNTs.

[0011] The shortcoming of the preparation prior art of graphene-gold-TNTs (Graphene-Au-TNTs, GATNTs) material: 1, use the equipment of pressurization such as autoclave or carry out microwave heating operation, in carrying out industrialized production process, must Increase equipment investment and increase production cost

3. In conventional high-pressure reactors or microwave heating for hydrothermal reaction, the doping element gold of composite nanotubes is not involved in the crystallization of nanotubes to a high degree, and there is a problem that doping element gold is easy to fall off.

The more common preparation method is to avoid high-temperature calcination of graphene-TNTs in order to avoid the formation of carbon oxides, which will affect the crystallinity of TNTs and directly affect the performance of TNTs.

5. So far, using the preparation process proposed by the patent number ZL200910111090.0, only the composite Ag-TiO 2 nanotube

In the above four patent specifications, there is no GMTNTs material preparation process under normal pressure

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