Preparation method and application of a highly active functionalized graphene capable of adsorbing mycotoxins

A mycotoxin and graphene technology, applied in the field of analytical chemistry, can solve the problems of not being able to simultaneously adsorb mycotoxins, reduce the quality of grain and oil, and occupy too much formula space, and achieve high practical value and application prospects, easy to scale production, good The effect of solubility and dispersibility

Active Publication Date: 2019-03-19
ACAD OF NAT FOOD & STRATEGIC RESERVES ADMINISTRATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the selective adsorbent in the physical method is used for the removal of mycotoxins. There are many kinds of adsorbents involved. Commonly used adsorbents include activated carbon, attapulgite and activated clay. The adsorption principle is mainly based on the advantages of its own pore structure. Adsorption, although it has a good removal effect on mycotoxins, its application prospects are limited due to the large amount of impurities, slow adsorption rate, and low regeneration efficiency
To sum up, the common defects of all kinds of adsorbents are: ①The adsorption function is single, and it cannot adsorb many different types of mycotoxins in grain and oil at the same time; , combine with vitamins, minerals and other nutrients in grain and oil, and interfere with the utilization of nutrients; ④ may contain other pollutants, which will reduce the quality of grain and oil to a certain extent
So far, graphene oxide has shown excellent adsorption properties for heavy metal ions, dye molecules and antibiotics. There has been no report on the use of this functionalized graphene material for adsorption, especially there are no relevant literature and patent reports for adsorption. Research on Mycotoxins

Method used

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  • Preparation method and application of a highly active functionalized graphene capable of adsorbing mycotoxins
  • Preparation method and application of a highly active functionalized graphene capable of adsorbing mycotoxins
  • Preparation method and application of a highly active functionalized graphene capable of adsorbing mycotoxins

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] 1) The 5mg / mL graphene oxide dispersion was subjected to the first ultrasonic treatment to make the graphene oxide dispersion form a uniform dispersion; then centrifuged at a speed of 5000r / min, and the lower layer aggregates were removed after the centrifugal treatment. Upper layer solution; the upper layer solution is subjected to a second ultrasonic treatment to completely exfoliate the graphene oxide in the upper layer solution, and then centrifuged at a speed of 10000r / min. After the centrifuge treatment, the unstripped graphene oxide on the upper layer is removed, Obtain exfoliated graphene oxide; disperse the exfoliated graphene oxide in deionized water, and continue the third ultrasonic treatment to make the exfoliated graphene oxide uniformly dispersed in deionized water to obtain a single layer with a concentration of 1 mg / mL Or a multilayer graphene oxide dispersion;

[0047] 2) Mix 20 mL of the single-layer or multi-layered graphene oxide dispersion with 7.5 mg...

Embodiment 2

[0050] Replace "7.5 mg of didodecyl dimethyl ammonium bromide" in Example 1 with "3.8 mg of didodecyl dimethyl ammonium bromide", and proceed in the same manner as in Example 1. .

Embodiment 3

[0052] The "7.5 mg of didodecyl dimethyl ammonium bromide" in Example 1 was replaced with "20 mg of didodecyl dimethyl ammonium bromide", and everything else was performed in the same manner as in Example 1.

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Abstract

The invention discloses a preparation method of high-activity functionalized graphene capable of adsorbing fungaltoxin. Graphene oxide dispersion liquid of a single-layer or multi-layer structure and surfactant are mixed, then, a mixture is subjected to forth ultrasonic processing and is stirred for 24 to 48h at room temperature to obtain even mixed liquor, and the mixed liquor is stirred at the temperature of 70 to 95DEG C for 6 to 10h to obtain the functionalized graphene. The graphene oxide is taken as a raw material, amphipathy surfactant is used as modifier, the graphene is subjected to covalence functional modification through ion exchange and amidation reaction, the functionalized graphene with good soluble dispersion capacity is obtained, and the adsorption performance of the functionalized graphene is improved. The functionalized graphene has an outstanding adsorption effect on the fungaltoxin, and has high practical value and good application prospect.

Description

Technical field [0001] The invention belongs to the field of analytical chemistry, and specifically relates to a preparation method and application of functionalized graphene capable of adsorbing mycotoxins with high activity. Background technique [0002] Mycotoxins are toxic secondary metabolites produced by fungi growing in food or feed. They are extremely harmful to the health of humans and animals, and have teratogenic, carcinogenic, and cellular mutagenic effects. At present, there are more than 300 kinds of mycotoxins known, mainly including aspergillus toxins, fusarium toxins, penicillin toxins, etc. Common mycotoxins that are serious to human health mainly include aflatoxin, vomiting toxin, fumonisins, zearalenone, ochratoxin, patulin, citrinin, etc. In addition to harming the health of humans and animals, mycotoxins also lead to a decline in the quality of agricultural products, hinder the export of agricultural products, and cause huge losses to farmers and the agricu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/20B01J20/30A23L5/20
CPCB01J20/20
Inventor 孙长坡白小娟伍松陵罗晓宏常晓娇王楠希
Owner ACAD OF NAT FOOD & STRATEGIC RESERVES ADMINISTRATION
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