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Preparation method and application of high-activity functionalized graphene capable of adsorbing fungaltoxin

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, and good The effect of solubility and dispersibility

Active Publication Date: 2016-12-14
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 high-activity functionalized graphene capable of adsorbing fungaltoxin
  • Preparation method and application of high-activity functionalized graphene capable of adsorbing fungaltoxin
  • Preparation method and application of high-activity functionalized graphene capable of adsorbing fungaltoxin

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Experimental program
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Effect test

Embodiment 1

[0046] 1) The 5mg / mL graphene oxide dispersion is subjected to ultrasonic treatment for the first time, so that the graphene oxide dispersion forms a uniform dispersion; then centrifuged at a speed of 5000r / min, and the lower aggregate is removed after centrifugation to obtain The upper layer solution: the upper layer solution is subjected to ultrasonic treatment for the second time, so that the graphene oxide in the upper layer solution is completely peeled off, and then centrifuged at a speed of 10000r / min, and the unstripped graphene oxide on the upper layer is removed after the centrifugal treatment, Obtain exfoliated graphene oxide; disperse the exfoliated graphene oxide in deionized water, and continue to carry out the third ultrasonic treatment, so that the exfoliated graphene oxide is uniformly dispersed in deionized water, and the obtained concentration is 1mg / mL in the form of a single layer Or the graphene oxide dispersion liquid of multilayer structure;

[0047] 2)...

Embodiment 2

[0050] In embodiment 1, " the didodecyl dimethyl ammonium bromide of 7.5 mg " is changed into " the didodecyl dimethyl ammonium bromide of 3.8 mg ", and others are all carried out in the same manner as in embodiment 1 .

Embodiment 3

[0052] In Example 1, "7.5 mg didodecyldimethylammonium bromide" was replaced with "20 mg didodecyldimethylammonium bromide", and the others were carried out 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 in particular relates to a preparation method and application of highly active functionalized graphene capable of absorbing mycotoxins. Background technique [0002] Mycotoxins are toxic secondary metabolites produced by fungi growing in food or feed, which are extremely harmful to human and animal health, and have teratogenic, carcinogenic, and mutagenic effects. At present, there are more than 300 kinds of mycotoxins known, mainly including aspergillus toxins, fusarium toxins, penicillin toxins and so on. Common mycotoxins that are seriously harmful to human health mainly include aflatoxin, deoxynivalenol, fumonisin, zearalenone, ochratoxin, patulin, citrinin, etc. In addition to endangering 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 agri...

Claims

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Application Information

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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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