Graphene oxide-silver compound particle and preparation method thereof

A technology of composite particles and graphene, which is applied in the direction of graphene, microsphere preparation, microcapsule preparation, etc., can solve the problems of long reduction time, agglomeration, and affecting the performance of metallic silver, so as to reduce production costs, avoid agglomeration, and promote reduction Effect

Inactive Publication Date: 2013-05-01
SHANGHAI INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the method of reducing graphite oxide is commonly used to prepare graphene. When reducing graphite oxide to prepare graphene oxide, there are defects such as long reduction time and large amount of reducing agent.
In addition, due to its hydrophobic characteristics, the reduced graphene oxide is prone to irreversible agglome

Method used

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  • Graphene oxide-silver compound particle and preparation method thereof
  • Graphene oxide-silver compound particle and preparation method thereof
  • Graphene oxide-silver compound particle and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A graphene oxide and silver composite particle, which is a core-shell structure, the core is an organic particle, and the shell is a graphene oxide-silver nanoparticle, wherein the organic particle and the graphene oxide-silver nanoparticle are calculated by mass ratio, that is, the organic particle : Graphene Oxide: Silver Nanoparticles: 100:1:0.5;

[0034] The organic particles are polystyrene microspheres.

[0035] The preparation method of above-mentioned a kind of graphene oxide and silver composite particle specifically comprises the steps:

[0036] (1), the concentration is 1mg·mL -1 Preparation of graphite oxide aqueous solution

[0037] Weigh 50 mg of graphite oxide (A. Wojcik, P. V. Kamat, ACS Nano 4 (2010) 6697) prepared by the Hummers method into 20 mL of deionized water, ultrasonically disperse evenly, transfer to a 50 mL volumetric flask, constant volume, and each subsequent Sonicate for 1 hour before use;

[0038] (2) Preparation of suspension of org...

Embodiment 2

[0046] A graphene oxide and silver composite particle, which is a core-shell structure, the core is an organic particle, and the shell is a graphene oxide-silver nanoparticle, wherein the organic particle and the graphene oxide-silver nanoparticle are calculated by mass ratio, that is, the organic particle : graphene oxide: silver nanoparticles is 100:2:0.5;

[0047] The organic particles are polystyrene microspheres.

[0048] The preparation method of above-mentioned a kind of graphene oxide and silver composite particle specifically comprises the steps:

[0049] (1), the concentration is 1mg·mL -1 Preparation of graphite oxide aqueous solution

[0050] With embodiment 1;

[0051] (2) Preparation of suspension of organic particles

[0052] The suspension of organic particles used in this example is an aqueous solution of polystyrene microspheres with a concentration of 50 mg / mL, purchased directly from Zhejiang Henghui Chemical Co., Ltd.;

[0053] (3) Add 5 mL of polyst...

Embodiment 3

[0056] A graphene oxide and silver composite particle, which is a core-shell structure, the core is an organic particle, and the shell is a graphene oxide-silver nanoparticle, wherein the organic particle and the graphene oxide-silver nanoparticle are calculated by mass ratio, that is, the organic particle : graphene oxide: silver nanoparticles is 100:1.5:0.5;

[0057] The organic particles are polystyrene microspheres.

[0058] The preparation method of above-mentioned a kind of graphene oxide and silver composite particle specifically comprises the steps:

[0059] (1), the concentration is 1mg·mL -1 Preparation of graphite oxide aqueous solution

[0060] With embodiment 1;

[0061] (2) Preparation of suspension of organic particles

[0062] The suspension of organic particles used in this embodiment is a polystyrene microsphere aqueous solution with a concentration of 50 mg / mL, which is directly purchased from Zhejiang Henghui Chemical Co., Ltd.;

[0063] (3) Add 5mL o...

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Abstract

The invention discloses a graphene oxide-silver compound particle and a preparation method thereof. The graphene oxide and silver compound particle is in a core-shell structure; a core is an organic matter or inorganic matter particle; and a shell is the graphene oxide-silver compound particle. The preparation method particularly comprises the following steps of: preparing a water solution containing graphene oxide; preparing a suspension solution of the organic matter or inorganic matter particle; preparing the core-shell structure compound particle covered by graphene oxide on the surface; mixing the core-shell structure compound particle covered by graphene oxide on the surface with a silver nitrate solution; adding a reducing agent to carry out one-step reduction reaction under a nitrogen atmosphere; and naturally cooling a reaction solution to a room temperature, centrifuging, washing and drying to obtain the graphene oxide-silver compound particle. According to the graphene oxide-silver compound particle and the preparation method thereof disclosed by the invention, the performance of the finally-obtained graphene oxide-silver compound particle is very good, the utilization amount of the reducing agent used in a preparation process is less and the production cost is low.

Description

technical field [0001] The invention relates to a graphene oxide-silver composite particle and a preparation method thereof. Background technique [0002] Graphene is a new type of two-dimensional carbon material. Due to its unique structure, it has special electrical, mechanical and chemical properties, so it has great application potential in catalysis, sensors, microelectronics and other fields. extensive attention of researchers. [0003] Silver nanoparticles and their composites have special electronic structures, so they have important applications in sensing, surface-enhanced Raman scattering, biomarkers, and antibacterial. Graphene-silver nanoparticle composites, due to the strong interaction between graphene and silver nanoparticles, have been shown to have superior optical, photocatalytic and surface-enhanced Raman properties than graphene or silver nanoparticles alone performance. [Mingshan Zhu, Penglei Chen, and Minghua Liu, ACS Nano, 5( 6), 2011, 4529–4536] ...

Claims

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Application Information

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IPC IPC(8): C23C18/44B22F9/24B01J13/22C01B31/02C01B32/184
Inventor 张太阳李向清康诗钊穆劲秦利霞
Owner SHANGHAI INSTITUTE OF TECHNOLOGY
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