Porous graphene-silver nano-square composite material and its preparation method and application

A technology of porous graphene and composite materials, applied in the field of porous graphene-silver nano-square composite materials and its preparation, can solve the problem of limiting the physical enhancement of silver nano-squares, the inability to selectively detect thiram series pesticides, and the inability to obtain selectivity To accurately detect the SERS active substrate and other issues, to achieve the effect of reduced preparation cost and simple preparation method
CN106525813BActive Publication Date: 2018-12-21HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
Publication Date
2018-12-21

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Abstract

The invention discloses a porous graphite-silver nano-diamond composite as well as a preparation method and an application thereof. The composite comprises porous graphite and a silver nano-diamonds, wherein pores of the porous graphite are intercommunicated micropores, and one side of the silver nano-diamond is in adsorption connection with the pore walls of the porous graphite. According to the preparation method, graphene oxide, sodium bisulfite and deionized water are mixed and subjected to ultrasonic oscillation, an obtained mixed solution is left to stand at 90-100 DEG C and cooled, black graphene gel suspended in water is rinsed with deionized water and subjected to freeze drying, obtained spongy porous graphene is soaked in an ethyl alcohol dispersion solution of the silver nano-diamond and taken out, an intermediate product is obtained, then the dried intermediate product is compressed, and the target product is prepared. The composite is quite suitable for serving as an active substrate for SERS (surface-enhanced Raman scattering), so that a laser Raman spectrometer selectively measures the content of dimethyldithiocarbamate pesticides attached to the composite.
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Description

technical field

[0001] The invention relates to a composite material and its preparation method and application, in particular to a porous graphene-silver nano-square composite material and its preparation method and application. Background technique

[0002] Surface-enhanced Raman scattering (SERS) spectroscopy is the vibrational spectrum of molecules, which can provide molecular fingerprint information and has extremely high sensitivity. Therefore, SERS analysis technology has a wide range of applications in the fields of chemistry, biology, medicine, environment and food safety. At present, people have made various efforts to develop different SERS materials, such as a noble metal nanoparticle-porous graphene composite material and its preparation method published by the applicant on July 8, 2015 in the Chinese invention patent application CN104759616A and uses. The composite material mentioned in the patent application documents for this invention is porous graphene wi...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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