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A kind of nano-silver modified graphene method
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A technology of graphene and nano-silver, which is applied in the direction of nano-technology, can solve problems such as difficult to obtain, and achieve the effect of complete structure, less surface functional groups, and nano-silver modification
Inactive Publication Date: 2015-12-02
HARBIN INST OF TECH
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Problems solved by technology
This method uses electrophoretic deposition to prepare graphene / silver composite materials, which can only be deposited on conductive substrates as electrochemical materials, and it is difficult to obtain separate products for other fields
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specific Embodiment approach 1
[0022] Specific embodiment one: this embodiment provides a kind of method of nano-silver modified graphene, specifically realizes through the following steps:
[0023] 1. Graphene will be prepared with reference to 201310262842.X "A Method for Preparing Graphene by Foaming and Expansion Method". The ratio of graphene to water is 1g: 1L ~ 3g: 1L, ultrasonically dispersed, and the treatment time is 2 ~ 4h.
[0024] 2. Weigh silver nitrate and sodium hydroxide at a mass ratio of 1:0.4~1, and configure 1~5wt% sodium hydroxide aqueous solution and 1~10wt% silver nitrate aqueous solution, then mix the two evenly, and finally stir Add 1-5wt% ammonia water dropwise until the solution is clear.
[0025] 3. The tartaric acid, glucose and water are mixed and dissolved in a mass ratio of 1:9 to 13:200 to 300, and stirred evenly.
[0026] 4. Heat the mixed aqueous solution of tartaric acid and glucose to 110-130°C, keep the temperature constant for 10-30 minutes, and then cool to room tem...
specific Embodiment approach 2
[0030] Specific embodiment two: the difference between this embodiment and specific embodiment one is that the mass fraction of the silver nitrate aqueous solution described in the step 2 is 2~7%, the mass fraction of the sodium hydroxide aqueous solution is 2~4%, the ammoniacal liquor The mass fraction is 2 to 4%, the mass ratio of silver nitrate to sodium hydroxide is 1:0.5 to 0.8, and the others are the same as in Embodiment 1.
specific Embodiment approach 3
[0031] Specific embodiment three: the difference between this embodiment and specific embodiment one and two is that the mass ratio of tartaric acid, glucose and water described in step three is 1: 10~12:240~260, and others are the same as specific embodiment one , Two are the same.
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Abstract
The invention discloses a method for modifying graphene through nano-sliver. The method includes the steps of 1, adding graphene into water for ultrasonic treatment; 2, adding sodium hydroxide solution into silver nitrate solution, and dropping ammonia while stirring until obtained solution clarifies so that silver-ammonia solution is obtained; 3, mixing and dissolving tartaric acid and glucose in water, and performing stirring to allow dissolution; 4, heating the solution obtained in the step 3, and allowing the solution to cool to the room temperature; 5, adding ethyl alcohol into the solution obtained in the step 4, and mixing them well; 6, adding the solution obtained in the step 2 and the solution obtained in the step 5 successively into the solution made in the step 1, and allowing reaction under ultrasonic conditions; 7, subjecting a product of the step 6 to suction filtering, washing the filtered product with ethyl alcohol and water in turns, and performing drying to obtain nano-sliver modified graphene. The method has the advantages that reaction materials are simple and easy to obtain, reaction conditions are moderate, efficiency is high, the product has stable properties, and wider range of production is benefited; the graphene to be used is complete in structure and has few surface functional groups, and nano-sliver modification of the surface of the graphene is more benefited.
Description
technical field [0001] The invention belongs to the technical field of surface modification of nanometer materials, and relates to a method for modifying graphene with nanometer silver. Background technique [0002] Graphene is a two-dimensional carbon atom crystal with a planar hexagonal lattice structure, which can be regarded as a layer of exfoliated graphite molecules with a thickness of a single layer of atoms. The basic structural unit of graphene is a stable carbon six-membered ring, which has excellent chemical stability and is currently the most ideal two-dimensional nanomaterial. Graphene has excellent thermal conductivity and excellent electrical properties; at the same time, graphene has a large specific surface area, so when it is used as a supercapacitor electrode material, a high electric double layer capacitance can be obtained; graphene can also carry out various This kind of functional chemical modification makes its doping in polymers very successful, all...
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