Preparation method and application of magnetic graphene oxide adsorbent material

An oxide stone and adsorbent technology, applied in chemical instruments and methods, adsorbed water/sewage treatment, alkali metal oxides/hydroxides, etc., can solve the problems of low utilization efficiency, low adsorption capacity, difficult recovery and separation, etc. To achieve the effect of easy separation, good dispersibility, and low adsorption capacity

Active Publication Date: 2016-02-03
ANHUI NORMAL UNIV
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Problems solved by technology

[0004] However, some of the adsorbent materials reported in the literature for the adsorption of copper ions have relatively low adsorption capacity, some are difficult to recycle and separate, and their utilization efficiency is low in the process of treating sewage containing heavy

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  • Preparation method and application of magnetic graphene oxide adsorbent material
  • Preparation method and application of magnetic graphene oxide adsorbent material
  • Preparation method and application of magnetic graphene oxide adsorbent material

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[0036] Example 1

[0037] A preparation method of magnetic graphene oxide adsorbent material includes the following steps:

[0038] (a) Preparation of graphene oxide (GO)

[0039] Graphite oxide is prepared by the Hummers method in which graphite powder is modified. Weigh 2.0g graphite powder into a 250mL Erlenmeyer flask, slowly pour 46mL98% mass fraction of concentrated sulfuric acid into the Erlenmeyer flask, then place it in an ice-water bath, mix with magnetic stirring, and then slowly add 1.0g NaNO 3 And 6.0gKMnO 4 , Mix and stir in an ice-water bath for 2 hours, then transfer the mixture to a constant temperature water bath at 35°C for 12 hours. Then add 280mL deionized water to dilute, and stir for 30min, after the temperature rises to 90 ℃, add 100mL mass fraction 30% H 2 O 2 After cooling to room temperature, filter to obtain the product, wash the product with volume fraction 5% HCl (until the filtrate is made of BaCl 2 Solution detection without SO 4 2- ), wash with deion...

Example Embodiment

[0046] Example 2

[0047] A preparation method of magnetic graphene oxide adsorbent material includes the following steps:

[0048] (a) Preparation of graphene oxide (GO)

[0049] Graphite oxide is prepared by the Hummers method in which graphite powder is modified. Weigh 2.2g of graphite powder into a 250mL Erlenmeyer flask, slowly pour 50mL of 98% concentrated sulfuric acid into the Erlenmeyer flask, then place it in an ice-water bath, mix with magnetic stirring, and then slowly add 1.2g NaNO 3 And 6.5gKMnO 4 , Mixing and stirring in an ice-water bath for 2.3 hours, then transfer the mixture to a 30°C constant temperature water bath for 12 hours. Then add 300mL deionized water to dilute, and stir for 30min, after the temperature rises to 90 ℃, add 110mL mass fraction 30% H 2 O 2 After cooling to room temperature, filter to obtain the product, wash the product with volume fraction 5% HCl (until the filtrate is made of BaCl 2 Solution detection without SO 4 2- ), wash with deionized...

Example Embodiment

[0056] Example 3

[0057] A preparation method of magnetic graphene oxide adsorbent material includes the following steps:

[0058] (a) Preparation of graphene oxide (GO)

[0059] Graphite oxide is prepared by the Hummers method in which graphite powder is modified. Weigh 2.4g graphite powder into a 250mL Erlenmeyer flask, slowly pour 55mL98% mass fraction of concentrated sulfuric acid into the Erlenmeyer flask, then place it in an ice water bath, mix with magnetic stirring, and then slowly add 1.0g NaNO 3 And 7.0gKMnO 4 , Mix and stir in an ice-water bath for 2.5 hours, then transfer the mixture to a 33°C constant temperature water bath for 10 hours. Then add 340mL deionized water to dilute, and stir for 30min, after the temperature rises to 90 ℃, add 120mL mass fraction 30% H 2 O 2 After cooling to room temperature, filter to obtain the product, wash the product with volume fraction 5% HCl (until the filtrate is made of BaCl 2 Solution detection without SO 4 2- ), wash with deioni...

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Abstract

The invention discloses a preparation method and application of a magnetic graphene oxide adsorbent material. The preparation method comprises the steps that chitosan reacts with ferrous ions and ferric ions to synthesize magnetic chitosan nanoparticles; the magnetic chitosan nanoparticles are subjected to reduction and acidification by carbon disulfide, then connect onto the surface of graphene oxide by an amidation reaction, thus a new magnetic graphene oxide adsorbent material capable of adsorbing metal ions, especially copper ions is obtained. The graphene oxide has unique two-dimension monoatomic layer structures, so that the surface area of the graphene oxide is large, then a large number of oxygen-containing groups distributed on the surface of the graphene oxide are capable of well adsorbing the metal ions in wastewater, and the magnetic chitosan modified by CS2 is added, not only are the adsorbability and the dispersibility in water improved, but also the separation is easier under the action of an applied magnetic field. The defects of low adsorbing capacity, difficult recovery and reuse, long separating time, low adsorption efficiency and the like in a process that a traditional adsorption material adsorbs the copper ions are overcome.

Description

technical field [0001] The invention relates to the technical field of preparation and application of functional nanometer materials, in particular to a preparation method and application of a magnetic graphene oxide adsorbent material. Background technique [0002] With the development of social economy and the intensification of human activities, environmental pollution is increasing day by day, and the problem of environmental pollution has increasingly become one of the topics of common concern in all countries in the world. The pollution of water resources is a major environmental pollution problem facing today's society. A large amount of wastewater discharged by industrial enterprises will lead to continuous deterioration of the water environment, seriously affecting the utilization of water resources and the structure of aquatic ecosystems. The discharge of heavy metal wastewater is one of the main sources of water environmental pollution. It not only seriously enda...

Claims

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Application Information

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IPC IPC(8): B01J20/22B01J20/28B01J20/30C02F1/28C02F1/62
Inventor 刘金水刘文秀及倩倩
Owner ANHUI NORMAL UNIV
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