Preparation method for metal nanoparticle-loaded nitrogen-doped porous graphene

A technology of porous graphene and nanoparticles, applied in chemical instruments and methods, catalyst activation/preparation, physical/chemical process catalysts, etc., can solve the problems of unreported preparation methods, and achieve low cost, mild reaction conditions, and process simple effect

Active Publication Date: 2017-03-22
北京博智创盛医药有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] At present, the preparation method of nitrogen-doped porou

Method used

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  • Preparation method for metal nanoparticle-loaded nitrogen-doped porous graphene
  • Preparation method for metal nanoparticle-loaded nitrogen-doped porous graphene
  • Preparation method for metal nanoparticle-loaded nitrogen-doped porous graphene

Examples

Experimental program
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Effect test

Embodiment 1

[0021] Feed according to the mass ratio of graphene oxide, metal precursor, hydrogen peroxide, and ammonia 1:0.033:0.05:30. Take 50mL of graphene oxide aqueous solution with a concentration of 6mg / mL, put it into a 100mL polytetrafluoroethylene reactor liner, add 5mL of hydrogen peroxide solution with a mass fraction of 0.3% and 30mL with a mass fraction of 28 - 30% aqueous ammonia solution and 10 mg potassium chloropalladate. The uniformly mixed reactants were put into a hydrothermal reaction kettle, and subjected to a hydrothermal reaction in an oven at 180° C. for 6 hours to obtain nitrogen-doped porous graphene loaded with palladium nanoparticles.

[0022] In order to better understand the structural characteristics and properties of the nitrogen-doped porous graphene loaded with palladium nanoparticles prepared in this example, SEM, TEM, XPS, adsorption-desorption and pore size distribution tests were carried out respectively.

[0023] like figure 1 Shown, the nitrogen-...

Embodiment 2

[0025] Feed according to the mass ratio of graphene oxide to metal precursor, hydrogen peroxide, and ammonia 1:0.001:0.05:0.05. Take 75 mL of graphene oxide aqueous solution with a concentration of 4 mg / mL, put it into a 100 mL polytetrafluoroethylene reactor liner, add 5 mL of hydrogen peroxide solution with a mass fraction of 0.3% and 0.05 mL of a hydrogen peroxide solution with a mass fraction of 28-30% under stirring conditions. % ammonia solution and 0.3mg potassium chloroplatinite. The uniformly mixed reactants were put into a hydrothermal reaction kettle, and hydrothermally reacted in an oven at 120° C. for 24 hours to obtain nitrogen-doped porous graphene loaded with platinum nanoparticles.

Embodiment 3

[0027] Feed according to the mass ratio of graphene oxide to metal precursor, hydrogen peroxide, and ammonia 1:0.008:0.05:24. Take 50mL graphene oxide aqueous solution with a concentration of 5mg / mL, put it into a 100mL polytetrafluoroethylene reactor liner, add 5mL hydrogen peroxide solution with a mass fraction of 0.3% and 20mL with a mass fraction of 28-30% Ammonia solution and 2mg potassium chloroaurate. The uniformly mixed reactants were put into a hydrothermal reaction kettle, and hydrothermally reacted in an oven at 180° C. for 10 hours to obtain nitrogen-doped porous graphene loaded with gold nanoparticles.

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Abstract

The invention belongs to the technical field of a carbon material and specifically relates to a preparation method for metal nanoparticle-loaded nitrogen-doped porous graphene. The method comprises the following steps: adding metal precursor, pore-foaming agent hydrogen peroxide and nitrogen source ammonia into a graphene oxide aqueous solution, heating the mixed solution to 100-220 DEG C and then performing hydrothermal reaction, thereby acquiring a metal nanoparticle-loaded nitrogen-doped porous graphene composite material. According to the method, a graphene porous structure is constructed while the nitrogen doping and the metal nanoparticle loading are realized; the whole process is simple; the demand on equipment is low; the reaction condition is mild; the production cost is low; the prepared metal nanoparticle/nitrogen-doped porous graphene has the characteristics of large specific area, excellent catalytic performance, uniform distribution of loaded metal nanoparticles, and the like; the metal nanoparticle-loaded nitrogen-doped porous graphene can be applied to the fields of electro-catalysis, supercapacitor, lithium ion battery, organocatalysis, and the like.

Description

technical field [0001] The invention belongs to the technical field of carbon materials and organic catalysis, and in particular relates to a preparation method of nitrogen-doped porous graphene loaded with metal nanoparticles. Background technique [0002] Graphene has become an ideal carrier for catalysts due to its unique graphitized planar structure, high specific surface area and good electrical conductivity and many other excellent properties. Qiu Jianding et al [CN201010523363.5] loaded Pt nanoparticles on functionalized graphene for the field of electrocatalysis. Doping graphene with N, on the one hand, can effectively control the surface charge distribution and surface defect degree of graphene carbon materials [ACS Nano2012, 6, 7084-7091], on the other hand, the doped N can also support graphene The nucleation and growth of metal catalyst nanoparticles (such as M=Pt, Pd, Co, etc.) and the interaction between M—C have an impact, thereby further changing the perform...

Claims

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Application Information

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IPC IPC(8): B01J27/24B01J35/02B01J35/10B01J37/10
CPCB01J27/24B01J35/023B01J35/10B01J35/1004B01J37/10
Inventor 奚江波柳津柏正武季珉
Owner 北京博智创盛医药有限公司
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