Preparation method of COF/GO (covalent organic framework/graphene oxide) adsorbent and application

An adsorbent and graphene technology, applied in chemical instruments and methods, adsorption water/sewage treatment, water/sewage treatment, etc., can solve the problems of small adsorption capacity and low adsorption efficiency, achieve enhanced adsorption effect, and improve adsorption performance , the effect of efficient removal method

Inactive Publication Date: 2018-05-01
HARBIN UNIV OF SCI & TECH
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  • Abstract
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Problems solved by technology

[0006] The present invention aims to solve the technical problems of small adsorption capacity and low adsorption efficiency of existing Cr(Ⅵ) adsorbents, thereby providing a preparation method and application of COF / GO adsorbents

Method used

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  • Preparation method of COF/GO (covalent organic framework/graphene oxide) adsorbent and application
  • Preparation method of COF/GO (covalent organic framework/graphene oxide) adsorbent and application
  • Preparation method of COF/GO (covalent organic framework/graphene oxide) adsorbent and application

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specific Embodiment approach 1

[0019] Specific embodiment one: the preparation method of a kind of COF / GO adsorbent of this embodiment is carried out according to the following steps:

[0020] 1. The modified Hummer method was used to prepare GO: under the condition of ice-water bath, the temperature was controlled at -4~4 ℃, the graphite powder and concentrated sulfuric acid were mixed, and after mechanical stirring for 10~30 min, KMnO was slowly added to it. 4 Continue to stir for 1-2 h, maintain the temperature at 0-4 °C, then raise the temperature to 40-50 °C, stir mechanically for 60-90 min, then add distilled water dropwise to the mixture to raise the temperature to 95-98 °C , and maintained at this temperature for 10–20 min, then added distilled water for dilution, and then added 30% H 2 o 2 solution, the reaction system turned golden yellow, cooled to room temperature, washed with 5% hydrochloric acid and distilled water until neutral to obtain a GO dispersion, and vacuum dried at 40-60 °C for 12-2...

specific Embodiment approach 2

[0024] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the volume ratio of the mass of GO powder described in step 1 to the mixed solution is 1mg:5mL; the others are the same as Embodiment 1.

specific Embodiment approach 3

[0025] Embodiment 3: The difference between this embodiment and Embodiment 1 is that the volume ratio of the mass of GO powder described in Step 1 to the mixed solution is 1mg:10mL; the others are the same as Embodiment 1.

[0026] Prove the beneficial effect of the present invention by following test:

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Abstract

The invention relates to a preparation method of a COF/GO (covalent organic framework/graphene oxide) adsorbent and application. A covalent organic framework material COF-TpPa-1 is loaded onto the surface of graphene oxide GO by an in-situ synthesis method, so that the COF/GO adsorbent is obtained. The method can ensure that the COF-TpPa-1 is tightly combined with the GO. The GO is a novel carbonaceous adsorbent, while the COF has a large specific surface area and light density and can serve as a good adsorbing material, and moreover, oxygen-containing functional groups existing on the surfaceof the COF enable the COF to have potential adsorption capacity. The number of active adsorption sites of the GO is increased by the COF/GO adsorbent, the adsorption property of hexavalent chromium ions Cr(VI) is enhanced by a synergistic effect, moreover, the requirement of reaction in the loading process is low, and the preparation method is easy to operate and convenient to carry out. Therefore such a COF/GO adsorbent material has a broad application prospect in the fields of material preparation and environment.

Description

technical field [0001] The invention relates to a preparation method and application of a COF / GO adsorbent, belonging to the field of material preparation and environment. Background technique [0002] With the progress of social industrialization, the impact of heavy metal pollution on human production and life is becoming more and more serious. Heavy metal pollution mainly has the characteristics of strong mobility, not easy to degrade, and long duration. Among them, hexavalent chromium Cr(Ⅵ) has high Toxicity has aroused widespread concern in the society. Once Cr(Ⅵ) enters the human body, it will cause cancer, teratogenicity, and mutagenesis. Therefore, the treatment of Cr(Ⅵ) still deserves our further study. [0003] So far, there are many treatment methods for Cr(Ⅵ) pollution in water bodies, but the adsorption method is widely used because of its advantages of simple operation, no secondary pollutants, short removal time and high efficiency. In the adsorption treatme...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/22B01J20/30C02F1/28C02F101/22
CPCB01J20/22C02F1/285C02F2101/22
Inventor 孙晓君杨豆豆唐洪亮
Owner HARBIN UNIV OF SCI & TECH
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