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Preparation method and application of novel silver ion doped TiO2 composite material

A composite material, silver ion technology, applied in chemical instruments and methods, chemical/physical process, light water/sewage treatment, etc., can solve the problem of insufficient contact between catalyst contact surface and interface, photocatalytic efficiency needs to be improved, and catalyst is not easy to separate. and other problems, to achieve the effects of good physical and chemical stability, short catalytic degradation time, and easy recycling and reuse.

Inactive Publication Date: 2017-04-26
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the visible light response and photocatalytic efficiency of the modified titanium dioxide still need to be improved, and the catalyst is not easy to separate and the number of times of recycling is low.
easy to cause waste
Because of the agglomeration of titanium dioxide, the catalyst contact surface and the interface contact are not sufficient

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] (1) Acidification of multi-walled carbon nanotubes

[0027] Accurately weigh 1.0 g of multi-walled carbon nanotubes and dissolve them in 70 mL of nitric acid (65-68 wt%), stir the suspension and reflux at 75 °C for 11 h, filter, and wash the solid with distilled water until the pH reaches 6.5 , and dried at 80 °C for 10 h in a vacuum environment to obtain multi-walled carbon nanotubes (MWCNTs);

[0028] (2) Preparation of graphene oxide-multi-walled carbon nanotube composites

[0029] Accurately weigh 0.3 g of graphene oxide and exfoliate it in 80 mL of ethanol-water mixture (V:V=1:1) for no less than 3 h by sonication. At room temperature, 0.4 g of the as-prepared acidified multi-walled carbon nanotubes were added to the alcohol-water solution of graphene oxide, and then the product was sonicated for 30 min. The solution was transferred to a PTFE-lined stainless steel autoclave and kept at 200 °C for 6 h. Then cool to room temperature. A black cylindrical product w...

Embodiment 2

[0036] (1) Acidification of multi-walled carbon nanotubes

[0037] Accurately weigh 1.0 g of multi-walled carbon nanotubes and dissolve them in 70 mL of nitric acid (65-68 wt%), stir the suspension and reflux at 75 °C for 11 h, filter, and wash the solid with distilled water until the pH reaches 6.5 , and dried at 80 °C for 10 h in a vacuum environment to obtain multi-walled carbon nanotubes (MWCNTs);

[0038] (2) Preparation of graphene oxide-multi-walled carbon nanotube composites

[0039] Accurately weigh 0.3 g of graphene oxide and exfoliate it in 80 mL of ethanol-water mixture (V:V=1:1) for no less than 3 h by sonication. At room temperature, 0.4 g of the as-prepared acidified multi-walled carbon nanotubes were added to the alcohol-water solution of graphene oxide, and then the product was sonicated for 30 min. The solution was transferred to a PTFE-lined stainless steel autoclave and kept at 200 °C for 6 h. Then cool to room temperature. A black cylindrical product w...

Embodiment 3

[0046] (1) Acidification of multi-walled carbon nanotubes

[0047] Accurately weigh 1.0 g of multi-walled carbon nanotubes and dissolve them in 70 mL of nitric acid (65-68 wt%), stir the suspension and reflux at 75 °C for 11 h, filter, and wash the solid with distilled water until the pH reaches 6.5 , and dried at 80 °C for 10 h in a vacuum environment to obtain multi-walled carbon nanotubes (MWCNTs);

[0048] (2) Preparation of graphene oxide-multi-walled carbon nanotube composites

[0049] Accurately weigh 0.3 g of graphene oxide and exfoliate it in 80 mL of ethanol-water mixture (V:V=1:1) for no less than 3 h by sonication. At room temperature, 0.4 g of the as-prepared acidified multi-walled carbon nanotubes were added to the alcohol-water solution of graphene oxide, and then the product was sonicated for 30 min. The solution was transferred to a PTFE-lined stainless steel autoclave and kept at 200 °C for 6 h. Then cool to room temperature. A black cylindrical product w...

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Abstract

The invention discloses a preparation method of a novel orientated silver ion doped titanium dioxide / graphene oxide composite material and application of the material in photocatalytic degradation. According to the method, graphene oxide-multiwalled carbon nanotubes are adopted as a carrier to perform functionalized modification on titanium dioxide on the surface of the carrier. The preparation method is characterized by comprising the following steps: adding ferroferric oxide, graphene oxide, multiwalled carbon nanotubes and tetrabutyl titanate according to a certain ratio to prepare magnetic titanium dioxide-graphene oxide-multiwalled carbon nanotubes, and further doping silver ions, thereby obtaining the magnetic titanium dioxide-graphene oxide-multiwalled carbon nanotube composite material in which silver ions are doped in an orientated manner. The catalyst has a remarkable degradation effect on polluted sewage of an azo structure, and has the advantages of being liable to separate, recycle and the like, and the degradation rate of the catalyst under visible light can be 90% or above.

Description

technical field [0001] The invention relates to a preparation method and application technology of a photocatalytic degradation catalyst, in particular to an application technology of a novel directional silver ion-doped titanium dioxide / graphene oxide-based composite material in the degradation of printing and dyeing wastewater. Background technique [0002] With the rapid development of my country's national economy and chemical industry, the discharge of industrial wastewater and printing and dyeing wastewater has gradually increased. These sewages contain a variety of biologically toxic organic substances, which have become one of the most important pollution sources that do the most harm to human health and are difficult to treat. Therefore, before the sewage is discharged into the environment, it needs to be treated, among which degradation and decolorization treatment of wastewater is a better method. At present, the more mature methods of degradation and decolorizat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/50C02F1/30C02F1/32C02F101/38
CPCY02W10/37
Inventor 王延辉罗川南丁超凡李剑波王晓娇段辉敏步亚南孙元玲冯娟娟孙敏
Owner UNIV OF JINAN
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