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Preparation method of Ag/GO photocatalytic material for sterilization

A photocatalytic material and graphene technology, which is applied in the preparation field of Ag/GO photocatalytic materials, can solve problems such as poor photocatalytic performance, and achieve the effects of simple preparation method, broadening the spectral response range, and improving photocatalytic performance.

Pending Publication Date: 2019-09-06
CHONGQING UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the inventors of the present invention have found through research that the photocatalytic material prepared by the existing method has poor photocatalytic performance, and the photocatalytic activity is enhanced in various ways, while the photocatalytic material with high photocatalytic activity is mainly used in the fields of energy and environment, especially It can exert its advantages in waste gas and waste water treatment, especially it has obvious inhibitory effect on the reproduction of various fungi in waste water

Method used

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  • Preparation method of Ag/GO photocatalytic material for sterilization

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Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0016] S1, using the Hummers method to prepare graphene or GO with graphite powder;

[0017] S2, 1.08g graphene with nanosheet structure and 0.85g AgNO 3 Grind and mix with a mortar;

[0018] S3. Put the mixture in a tube furnace, calcinate it under a nitrogen atmosphere at 500°C for 6 hours, and get a sample of 50% Ag / GO after natural cooling, 50% of which is the mass ratio of Ag nanoparticles and nanosheet graphene, and put it in a drying oven in spare.

Embodiment approach 2

[0020] S1, using the Hummers method to prepare graphene or GO with graphite powder;

[0021] S2, 2.16g graphene with nanosheet structure and 2.548g AgNO 3 Grind and mix with a mortar;

[0022] S3, the mixture is placed in a tube furnace, calcined at 500°C for 6h under a nitrogen atmosphere, and after natural cooling, a sample of 75% Ag / GO is obtained, 75% being the mass ratio of Ag nanoparticles to nanosheet graphene, and placed in a dry place Reserve in box.

Embodiment approach 3

[0024] S1, using the Hummers method to prepare graphene or GO with graphite powder;

[0025] S2, 4.32g graphene with nanosheet structure and 1.274g AgNO 3 Grind and mix with a mortar;

[0026] S3, the mixture is placed in a tube furnace, calcined at 500°C for 6h under a nitrogen atmosphere, and after natural cooling, the sample 19%Ag / GO is obtained, 19% is the mass ratio of Ag nanoparticles to nanosheet graphene, and placed in a dry place Reserve in box.

[0027] As a specific example, the preparation of graphene from graphite powder by the Hummers method in step S1 of the embodiments 1 to 3 specifically includes the following steps:

[0028] S11. Preparation of graphite oxide: assemble a 250mL reaction bottle in an ice-water bath, add 95% to 98% concentrated sulfuric acid, add a solid mixture of 2g graphite powder and 1g sodium nitrate under stirring, and then add 6g permanganate in portions Potassium, control the reaction temperature not to exceed 20°C, stir the reaction ...

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Abstract

The invention provides a preparation method of Ag / GO photocatalytic material for sterilization. The innovation and characteristics of the preparation method are as follows: (1) graphene, namely GO, isprepared from graphite powder by Hummers method; (2) uniformly grinding and mixing graphene with nano sheet structure and an appropriate amount of AgNO 3 by a mortar; and (3) placing the mixture in atube furnace, calcining at 500 DEG C under nitrogen atmosphere for 6 hours, and naturally cooling to obtain a sample ag / go. The preparation method provided by the application is simple, and the prepared Ag / GO photocatalytic material has high catalytic performance, and can be used as a heterogeneous catalyst in the waste gas and waste water treatment field. In particular, the strong sterilizationeffect of nano silver opens up a broad prospect for antibacterial disinfection of composite materials in water environment, and is the latest generation of antibacterial disinfection and photocatalytic material for treating water environment.

Description

technical field [0001] The invention relates to the technical field of environmental photocatalytic materials, in particular to a method for preparing an Ag / GO photocatalytic material used for sterilization. Background technique [0002] At present, the technology for preparing photocatalytic materials is mainly to construct nano-heterojunction structures, and use nano-heterojunctions to improve their photocatalytic efficiency. The design of photocatalytic materials is mainly to regulate the energy band structure and broaden the spectral response range of photocatalytic materials. A layer of Ag nanoparticles is mainly loaded on the graphene nanosheet layer. By adjusting the composition of the composite material to adjust the corresponding range of the spectrum of the photocatalytic material, that is, the separation effect of conduction band and valence band electrons and holes, to enhance its photocatalytic activity. However, the inventors of the present invention have fou...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/50A01N59/16A01N25/08A01P1/00C01B32/184B01D53/86C02F1/50
CPCB01J23/50B01J35/004B01J35/0013B01J35/0093A01N59/16A01N25/08C01B32/184B01D53/86C02F1/50C02F2305/10
Inventor 谢焕玲
Owner CHONGQING UNIV OF TECH
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