Cyclodextrin nanocluster-modified graphene film material for removing bisphenol A pollutants in water and preparation method thereof

A graphene membrane and nanocluster technology, applied in water pollutants, water/sewage treatment, adsorbed water/sewage treatment, etc., can solve the problem of water treatment membranes with slow water purification speed and no bisphenol A pollutants found in water materials, cumbersome separation, etc., to achieve the effect of large water flux, simple and fast removal process, and broad application prospects

Active Publication Date: 2018-03-06
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when cyclodextrin is used as an adsorbent, it has the disadvantages of slow water purification and complicated separation.
So far, no water treatment membrane material has been found that can remove BPA pollutants in water ultra-fast and efficiently and easily.

Method used

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  • Cyclodextrin nanocluster-modified graphene film material for removing bisphenol A pollutants in water and preparation method thereof
  • Cyclodextrin nanocluster-modified graphene film material for removing bisphenol A pollutants in water and preparation method thereof

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Embodiment 1

[0044] Embodiment 1. Preparation of a graphene membrane material modified by cyclodextrin nanoclusters.

[0045] Using the Staudenmaier method (see Poh HL, F, Ambrosi A, et al.Graphenes prepared by Staudenmaier, Hofmann and Hummers methods with consequent thermalexfoliation exhibit very different electrochemical properties[J].Nanoscale, 2012, 4(11): 3515-3522.) prepare graphene oxide dispersion liquid, Adjust the dispersion to a solid content of 0.5 mg / mL. Take 0.5g of monoamino-modified Y-cyclodextrin and mix it with 200mL of graphene oxide dispersion, and ultrasonically treat it for 0.5h to make it evenly mixed. The above mixture was heated to 100° C. for 16 h under stirring. Then, 10 mL of hydrazine hydrate was added to the reaction system, and the reaction was stirred at 100° C. for 24 h. The obtained mixture is filtered and washed several times, and the obtained solid is dispersed in water again, and filtered through a microporous filter membrane to form a cyclodextrin...

Embodiment 2

[0047] Embodiment 2. Preparation of a graphene membrane material modified by cyclodextrin nanoclusters.

[0048] Using Brodie's method (see Botas C, P, Blanco P, et al.Graphene materials with different structures prepared from the same graphite by the Hummers and Brodie methods [J].Carbon, 2013, 65: 156-164.) prepare the graphene oxide dispersion, adjust the dispersion to The solid content is 5.0 mg / mL. Take 2.0 g of monoamino-modified a-cyclodextrin and mix it with 200 mL of graphene oxide dispersion, and ultrasonicate for 0.5 h to make it evenly mixed. The above mixture was heated to 80°C for 8h under stirring. Then, 20 mL of hydrazine hydrate was added to the reaction system, and the reaction was stirred at 100° C. for 24 h. The obtained mixture is filtered and washed several times, and the obtained solid is dispersed in water again, and filtered through a microporous filter membrane to form a cyclodextrin-modified graphene membrane material on the filter membrane.

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Embodiment 3

[0050] Embodiment 3. Preparation of a graphene membrane material modified by cyclodextrin nanoclusters.

[0051] With the improved Hummers method (see Hummers WS, Offeman RE. Preparation of graphitic oxide. J Am Chem Soc 1958; 80: 1339; and. Zhou H, Yao W, Li G, Wang J, Lu Y. 4-ethylenedioxythiophene) hydrogel with excellent mechanical performance and high conductivity. Carbon 2013; 59: 495-502.) prepared a graphene oxide dispersion, and adjusted the dispersion to a solid content of 2.5 mg / mL. Take 1.0 g of monoamino-modified β-cyclodextrin and mix it with 200 mL of graphene oxide dispersion, and ultrasonicate for 0.5 h to make it evenly mixed. The above mixture was heated to 100° C. for 24 h under stirring. Then, 20 mL of hydrazine hydrate was added to the reaction system, and the reaction was stirred at 100° C. for 24 h. The obtained mixture is filtered and washed several times, and the obtained solid is dispersed in water again, and filtered through a microporous filter m...

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Abstract

The invention discloses a cyclodextrin nanocluster-modified graphene film material. Cyclodextrin on a graphene sheet is connected through a functional group reaction method based on graphene as a carrier, the nanoclusters are formed on the graphene surface through self-assembling, the graphene is obtained through reduction of various graphene oxides in various ways and the cyclodextrin is alpha, beta or gamma cyclodextrin subjected to functional group replacement. The cyclodextrin provides a carrier for a cyclodextrin nanocluster and provides a water filtering channel so that cyclodextrin canfully perform the adsorption effect on bisphenol A and the whole removal process is simple and fast. The graphene film has nanofiltration effects and greatly improves the removal efficiency of bisphenol A. The invention also discloses a preparation method of the cyclodextrin nanocluster-modified graphene film material.

Description

technical field [0001] The invention relates to a graphene membrane material modified by cyclodextrin nano-clusters, in particular to a water treatment membrane material capable of superfast and efficient removal of bisphenol A in water. Background technique [0002] Bisphenol A compounds are used industrially to synthesize materials such as polycarbonate and epoxy resin, and are used as plastic additives to manufacture various plastic products, ranging from mineral water bottles, medical equipment to the inner wall of food packaging containers, etc. its figure. However, when these compounds are ingested by the human body, they will cause endocrine disorders, especially serious adverse effects on the development of the brain and reproductive system of infants. Cancer and obesity caused by metabolic disorders are also considered to be related to this. Therefore, how to quickly, efficiently and easily remove bisphenol A compounds in water is receiving more and more attention ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/02B01D67/00B01J20/24C02F1/28C02F1/44C02F101/34
CPCB01D67/0039B01D71/021B01J20/24C02F1/286C02F1/44C02F2101/345
Inventor 陆云厉宝岩严韩
Owner NANJING UNIV
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