Graphene oxide-silver compound particle and preparation method thereof

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] ...

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 agglomeration and regenerated graphite under van der Waals force and π-π interaction, which seriously affects the performance of graphene.

Moreover, if silver is directly introduced into graphene oxide without any treatment, the dispersion of silver nanoparticles in graphene is not ideal, which will directly affect the performance of metallic silver.

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