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Ag/rGO sandwich-structure nano composite material as well as preparation method and application thereof

A nano-composite material and sandwich technology, which is applied in the application field of clean and sustainable new environmental governance, can solve problems such as easy agglomeration, and achieve the effect of improving reducing activity and inhibiting charge recombination.

Inactive Publication Date: 2017-12-29
董可轶 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the presence of van der Waals forces in graphene, it is prone to agglomeration

Method used

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  • Ag/rGO sandwich-structure nano composite material as well as preparation method and application thereof
  • Ag/rGO sandwich-structure nano composite material as well as preparation method and application thereof
  • Ag/rGO sandwich-structure nano composite material as well as preparation method and application thereof

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Embodiment 1

[0024] A kind of Ag / rGO sandwich structure nano-composite material, preparation steps are as follows:

[0025] (1) Aldhylation of graphene oxide: modify the carboxyl functional group on the surface of graphene, and then use 9-BBN (9-boronbicyclo[3.3.1]nonane) and Li 9-BBN (9-boronbicyclo[ 3.3.1] Lithium nonyl) as a reducing agent (Tetrahedron Letters, 1987,28,39,4575-4578; Tetrahedron Letters, 1987,28,49,6231-6234), one-step reduction of the carboxyl group on the graphene surface into Aldehyde groups, thus successfully modifying aldehyde groups on the surface of graphene.

[0026] (2) disperse the graphene oxide after the formylation into deionized water, and obtain the graphene oxide solution after the formylation of 0.5 mg / ml;

[0027] (3) The 100ml 0.5mg / ml formylated graphene oxide solution obtained in step 2 is mixed with 10ml 1*10 -4 The mol / L silver-ammonia solution was mixed according to the volume ratio of 10:1, glucose was added, and reacted for 1 hour at 98°C unde...

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Abstract

The invention discloses an Ag / rGO sandwich-structure nano composite material as well as a preparation method and application thereof. The composite material is characterized in that silver and graphene in AgNO3 / GO are reduced simultaneously through glucose so that silver nanoparticles are doped into a graphene lamellar structure, wherein the glucose is used as an auxiliary reducing agent; the activity of an aldehyde group is great and Ag<+> firstly forms on an Ag crystal seed on graphene oxide modified by the aldehyde group, so that an Ag-C chemical bond is formed; the glucose is added so that the Ag is increased and the graphene oxide is reduced into the graphene; a product sandwich Ag@rGO nano composite structure is obtained through the caking property of noble metal. Meanwhile, the reduced graphene oxide is used as a good conductor and can be used for inhibiting charge recombination. The composite material enters layers in a non-carbon particle form, the layer-to-layer distance of the graphene is increased and the layer-to-layer Van der Waals force is weakened, so that the possibility of agglomeration is reduced. Meanwhile, the reduction activity of the composite material on nitrophenol is greatly improved by a sandwich structure and a high rGO specific surface area of the composite material and the silver is used as a reducing agent.

Description

technical field [0001] The invention belongs to the application field of clean and sustainable new environment treatment, and in particular relates to an Ag / rGO sandwich structure nanocomposite material and its chemical catalysis application. Background technique [0002] Since the 20th century, with the continuous progress and development of science and technology, a series of consequences have been caused, such as global pollution and energy crisis. Human reproduction and survival have been seriously threatened, such as global warming, ozone layer destruction, etc., but the potential threats do not stop there. Therefore, protecting and governing the environment has become the common aspiration of all countries. Chemical pollution is the most serious problem in environmental pollution, which seriously damages water resources, soil and the atmosphere. However, the general methods of pollution treatment include: physical adsorption method, chemical oxidation method and other...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/50B01J37/16C02F1/70C07C213/02C07C215/76C02F101/38
CPCC02F1/70C07C213/02B01J23/50B01J37/16C02F2101/38B01J35/396C07C215/76
Inventor 董可轶刘颖婕李漠
Owner 董可轶
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