Graphene nano composite material as well as preparation method and application thereof

A nanocomposite material and nanomaterial technology, applied in the field of nanocomposite photocatalysts, can solve the problem of low catalytic degradation efficiency of neonicotinoid pollutants

Pending Publication Date: 2021-03-19
HARBIN INST OF TECH SHENZHEN GRADUATE SCHOOL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Photocatalytic technology has broad application prospects in pollution control, however, the catalytic degradation efficiency of existing photocatalysts for neonicotinoid pollutants is not high

Method used

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  • Graphene nano composite material as well as preparation method and application thereof
  • Graphene nano composite material as well as preparation method and application thereof
  • Graphene nano composite material as well as preparation method and application thereof

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preparation example Construction

[0039] Second aspect, the present invention provides a kind of preparation method of graphene nanocomposite material, such as figure 1 As shown, the preparation method is used to prepare the graphene nanocomposite material described in the first aspect above; as figure 1 Shown, this preparation method comprises the steps:

[0040] Step 1 (S11), using graphene oxide and butyl titanate as raw materials, preparing TiO by hydrothermal reaction 2 / rGO;

[0041] Step 2 (S12), with the TiO prepared in step 1 2 / rGO as raw material, graphene nanocomposites were prepared by high-temperature calcination.

[0042] Compared with the prior art, the graphene nanocomposite material provided by the invention is more convenient in terms of preparation method, and the graphene nanocomposite material with good stability and photocatalytic activity is prepared through a simple physical and chemical method.

[0043] Since pure TiO 2 The light absorption range is below 390nm, and it can only a...

Embodiment 1

[0060] Step 1: Using graphene oxide and butyl titanate as raw materials, prepare TiO by hydrothermal reaction 2 / rGO.

[0061] During specific implementation, 1g GO was added to 64ml of isopropanol to obtain a suspension. After ultrasonication for 1h to fully disperse it, 8ml of butyl titanate was added to it and continued to stir at 650rpm for 30min. Stir to obtain a suspension of the mixture, and then uniformly Add 2ml of pure water and stir again for 30min; place the mixture suspension at 2.5Mpa in a high-pressure reactor, and react for 18h under sealed conditions at 180°C. After the reaction is completed, centrifuge (6 times at 8000rpm) Obtain precipitation and dry (dry at 60°C for 5h) to obtain TiO 2 / rGO.

[0062] Step 2: TiO as prepared in Step 1 2 / rGO as raw material, TiO was prepared by high temperature calcination 2-x / rGO binary composite visible light catalyst.

[0063] During specific implementation, the prepared TiO 2 / rGO was calcined at 400°C for 5 hours...

Embodiment 2

[0072] Step 1, using graphene oxide and butyl titanate as raw materials, preparing TiO by hydrothermal reaction 2 / rGO.

[0073] During specific implementation, 1.36g of graphene oxide was added to 81ml of isopropanol to obtain a suspension, and the suspension was ultrasonically mixed to obtain a uniformly mixed first mixing system; 10.9g of titanium was added to the first mixing system butyl ester, stirred evenly to obtain a suspension of the mixture; then uniformly added 3ml of pure water to the suspension of the mixture, and stirred again to obtain the second mixed system; the second mixed system was placed in a high-pressure reactor, and the React for 18 hours under sealed conditions. After the reaction is completed, the precipitate is obtained by centrifugation, and the precipitate is dried to obtain TiO 2 / rGO. Among them, centrifugation refers to centrifugation at 8000 rpm for 8 times; drying refers to drying at 40° C. for 5 hours.

[0074] Step 2, with the TiO prepa...

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Abstract

The invention provides a graphene nano composite material as well as a preparation method and application thereof. The graphene nano composite material provided by the invention is a nano material which takes a single layer of rGO as a primitive material, and then TiO2-x nano particles are attached to the primitive material, wherein the x is 0.05-0.45. According to the graphene nano composite material, the TiO2-x nano particles with oxygen holes are attached to the surface of the rGO element material, so that the light absorption range of the nano material is expanded, the nano material can absorb visible light of a full-visible spectrum, the utilization of the nano material on the visible light is improved, the nano material has excellent photocatalytic performance, and the nano materialis suitable for efficient photocatalytic treatment on neonicotinoid pesticide pollutants.

Description

technical field [0001] The invention relates to the field of nanocomposite photocatalysts, and mainly relates to a graphene nanocomposite material and its preparation method and application. Background technique [0002] Neonicotinoid insecticides are the most important commercial insecticides in the global market due to their high insecticidal activity, broad spectrum, adequate water solubility and field stability. They are registered in more than 120 countries and used on more than 140 different crops. Neonicotinoid insecticides were developed in the 1980s, and the first commercial compound imidacloprid (ICP) was patented by Bayer AG in 1985 and successfully launched on the market in 1991. They are very active against feeding pests, including aphids, whiteflies, leafhoppers, mealybugs, thrips, some microlepidopteran pests, and many homopteran pests. Neonicotinoids, as agonists, strongly bind to the nicotinic acetylcholine receptors in the central nervous system, and can ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J21/06B01J21/18B01J37/10B01J37/08B01J35/10B82Y30/00B82Y40/00C02F1/30A62D3/17B09C1/08C02F101/30C02F101/34C02F101/36C02F101/38C02F103/06A62D101/04A62D101/20A62D101/22A62D101/26A62D101/28
CPCB01J21/063B01J21/18B01J37/10B01J35/004B01J35/1004B01J35/0013B01J37/082B82Y30/00B82Y40/00C02F1/30A62D3/17B09C1/08C02F2101/306C02F2101/38C02F2305/10C02F2101/34C02F2101/36C02F2103/06A62D2101/04A62D2101/20A62D2101/22A62D2101/26A62D2101/28B09C2101/00
Inventor 杨磊姚廷郡艾伟钟丹
Owner HARBIN INST OF TECH SHENZHEN GRADUATE SCHOOL
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