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Synthesis method of polymeric microspherical functionalized graphene oxide and application of polymeric microspherical functional graphene oxide in catalytic degradation on organophosphorus

A synthesis method and functionalization technology, applied in the direction of organic compound/hydride/coordination complex catalysts, physical/chemical process catalysts, chemical instruments and methods, etc., can solve problems such as complex preparation process, achieve large specific surface area, The effect of excellent hydrophilicity and stable mechanical properties

Inactive Publication Date: 2016-11-16
SHAANXI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Compared with the spontaneous hydrolysis of paraoxon, the paraoxon hydrolase activity of the molecularly imprinted polymer microspheres prepared by this method can increase the hydrolysis efficiency by up to 188 times, but the preparation process of this method is complicated, and the template molecules need to be removed after the reaction

Method used

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  • Synthesis method of polymeric microspherical functionalized graphene oxide and application of polymeric microspherical functional graphene oxide in catalytic degradation on organophosphorus
  • Synthesis method of polymeric microspherical functionalized graphene oxide and application of polymeric microspherical functional graphene oxide in catalytic degradation on organophosphorus
  • Synthesis method of polymeric microspherical functionalized graphene oxide and application of polymeric microspherical functional graphene oxide in catalytic degradation on organophosphorus

Examples

Experimental program
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Effect test

Embodiment 1

[0030] 1. Graphene oxide grafted with hydroxyethyl methacrylate

[0031] Weigh 200 mg of graphene oxide (purchased from Chengdu Organic Chemistry Co., Ltd., Chinese Academy of Sciences) into 100 mL of deionized water, ultrasonically disperse for 1 hour, then add 12 g of NaOH, ultrasonically disperse for 30 minutes, then add 10 g of chloroacetic acid, ultrasonically disperse for 2 hours, centrifuge After separation, the solid obtained by centrifugation was washed and centrifuged with methanol for 3 times, and then vacuum-dried at 55°C for 12 hours to obtain carboxylated graphene oxide; add carboxylated graphene oxide to 20mL N,N-dimethylformamide , ultrasonically dispersed for 30 minutes, then added 40 mL of thionyl chloride, and refluxed for 24 hours. The resulting product was centrifuged, washed 3 times with anhydrous tetrahydrofuran, and vacuum-dried at 55°C for 12 hours to obtain acyl chlorided graphene oxide; Graphene oxide was ultrasonically dispersed in 20mL of anhydrous...

Embodiment 2

[0040] In step 2 of Example 1, the amount of vinyl-functionalized graphene oxide was reduced to 25 mg, and other steps were the same as in Example 1 to obtain polymer microsphere-functionalized graphene oxide.

Embodiment 3

[0042] In step 2 of Example 1, the amount of vinyl-functionalized graphene oxide was increased to 100 mg, and other steps were the same as in Example 1 to obtain polymer microsphere-functionalized graphene oxide.

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Abstract

The invention discloses a synthesis method of polymeric microspherical functionalized graphene oxide and application of the polymeric microspherical functionalized graphene oxide in catalytic degradation on organophosphorus. According to the method, 1-vinylimidazole is covalently grafted to the surface of hydroxyethyl methylacrylate-functionalized graphene oxide through a crosslinking agent divinyl benzene to successfully synthesize the polymeric microspherical functionalized graphene oxide, and the active center of organophosphorus hydrolase is effectively simulated. Under the same conditions, the initial speed that the polymeric microspherical functionalized graphene oxide catalytically degrades ethylparaoxon is increased by 230 times compared with a blank control, the highest initial speed Vmax that the polymeric microspherical functionalized graphene oxide catalyzes a hydrolysis reaction of ethylparaoxon is 0.014 mmol / L.min, the Michaelis constant Km is 13.4 mmol / L, the high repeated utilization rate is achieved, and the hydrolysis activity is only reduced by about 5.2% after the polymeric microspherical functionalized graphene oxide is repeatedly used five times. The polymeric microspherical functionalized graphene oxide has a potential application value on organophosphorus poison degradation and organophosphorus bionic sensor construction detection.

Description

technical field [0001] The invention belongs to the technical field of degradation of organic phosphorus compounds, and in particular relates to a synthesis method of polymer microsphere functionalized graphene oxide and its application in catalytic degradation of organic phosphorus. Background technique [0002] Organophosphate compounds are often widely used in pesticides, plasticizers, petroleum additives and chemical warfare agents, especially organophosphate triesters, such as paraoxon, parathion, malathion, etc., usually used as crops The protective agent is used in the agricultural field. However, these substances are potentially toxic and can cause neurological shock, paralysis, shock and death. Compounds used as nerve gases in chemical warfare, such as sarin, tabun, and soman, also belong to organophosphates. These compounds inhibit acetylcholinesterase, a key enzyme involved in nerve signaling, which in turn causes neurological diseases. Therefore, the degradati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F292/00C08F220/28C08F220/06C08F226/06C08F212/36C08F2/48B01J31/06A62D3/35A62D101/04
CPCA62D3/35A62D2101/04B01J31/069C08F2/48C08F292/00C08F220/281
Inventor 张耀东马雪娟张林马珂珂卓彩霞夏梦凡
Owner SHAANXI NORMAL UNIV
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