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MOF-100(Fe)/bacterial cellulose composite material and preparation method and application thereof

A technology of MOF-100 and bacterial cellulose, applied in chemical instruments and methods, alkali metal compounds, other chemical processes, etc., can solve the problems of unstable removal effect, secondary pollution, narrow pH application range, etc., and achieve good removal Effect, Ease of recycling, Effect of improving recycling ability

Active Publication Date: 2018-10-12
RENMIN UNIVERSITY OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the operating cost of the membrane separation method is high; the removal effect of the biological method for PPCPs is unstable; the ozone oxidation method has the problems of large investment and high processing cost; the photocatalytic method consumes a lot of energy and is prone to produce a variety of aromatic intermediates during the reaction process. body; the pH range of Fenton's method is narrow (3-5) and H 2 o 2 Low utilization rate, Fe 2+ Low recovery rate is easy to cause secondary pollution
Compared with other treatment methods, the adsorption method is more and more used in the removal of PPCPs because of its simple operation and high removal efficiency, but the commonly used adsorbents often have low adsorption capacity and are difficult to recover.
Metal-organic framework (MOF) is a new type of nanoporous crystalline material, which has the advantages of high chemical stability, high porosity, large specific surface area, and strong modifiability, and its adsorption capacity for organic pollutants is often high. , and the material is stable, but poor cycle performance is one of the reasons that limit the development of MOF materials

Method used

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  • MOF-100(Fe)/bacterial cellulose composite material and preparation method and application thereof
  • MOF-100(Fe)/bacterial cellulose composite material and preparation method and application thereof
  • MOF-100(Fe)/bacterial cellulose composite material and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] 1) Cut the bacterial cellulose membrane into discs with a diameter of 3 cm, place in 100 ml of a mixed solution of 1% sodium hydroxide and 1‰ hydrogen peroxide, and heat and stir at 100°C for 12 hours , to obtain activated-bacterial cellulose membrane.

[0042] 2) The obtained activated-bacterial cellulose membrane was placed in 8 ml of 0.02 mol / liter ferric iron ethanol solution, and placed in a 60° C. constant temperature water bath shaker for 30 minutes, and the oscillation frequency was 100 rpm. Then the material was taken out, washed with ethanol and added to 8 ml of 0.02 mol / L trimesic acid ethanol solution, and shaken at the same temperature for 30 minutes. After 30 cycles like this, the orange-red membrane product was collected and washed with ethanol.

[0043] 3) Put the material prepared in step 2) into a 1% sodium hydroxide alkali solution by mass percentage, heat and stir at 90° C. for 1 hour, then wash and stir in deionized water until the composite membra...

Embodiment 2

[0046] Diclofenac sodium was chosen as the model pollutant. At room temperature, accurately weigh a certain amount of diclofenac sodium, and prepare a diclofenac sodium solution with a concentration of 80 mg / liter, measure 250 milliliters of the solution and put it into a 1-liter conical flask, and add 0.05 grams of diclofenac sodium prepared in Example 1 of the present invention. MOF-100(Fe) / bacterial cellulose membrane adsorbent, placed in a constant temperature incubator at 25°C and oscillating at a speed of 100 rpm, and at the time of 0, 60, 120, 180, 240, 330, 390, Samples were taken at 600 and 1440 minutes. The initial concentration of diclofenac sodium and the concentration of residual diclofenac sodium in the solution were measured by high performance liquid chromatography (HPLC) to obtain the removal rate. In addition, accurately measure 250 milliliters of diclofenac sodium solution and put it into a 1-liter conical flask, add 0.05 grams of bacterial cellulose membra...

Embodiment 3

[0049] 1) Cut the bacterial cellulose membrane into discs with a diameter of 3 cm, place in 100 ml of a mixed solution of 1% sodium hydroxide and 1‰ hydrogen peroxide, and heat and stir at 100°C for 12 hours , to obtain activated-bacterial cellulose membrane.

[0050] 2) The obtained activated-bacterial cellulose membrane was placed in 8 ml of 0.02 mol / liter ferric iron ethanol solution, and placed in a 60° C. constant temperature water bath shaker for 30 minutes, and the oscillation frequency was 100 rpm. Then the material was taken out, washed with ethanol and added to 16 ml of 0.02 mol / L trimesic acid ethanol solution, and shaken at the same temperature for 30 minutes. After 30 cycles like this, the orange-red membrane product was collected and washed with ethanol.

[0051] 3) Put the material prepared in step 2) into a 1% sodium hydroxide alkali solution by mass percentage, heat and stir at 90° C. for 1 hour, then wash and stir in deionized water until the composite membr...

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Abstract

The invention discloses a MOF-100(Fe) / bacterial cellulose composite material and a preparation method and application thereof. The preparation method comprises 1) activating a bacterial cellulose membrane in an alkali mixed solution to obtain an activated bacterial cellulose membrane, 2) orderly putting the activated bacterial cellulose membrane into an ethanol solution of ferric iron and an ethanol solution of trimesic acid, carrying out oscillation for a reaction and repeating oscillation multiple times to obtain the MOF-100(Fe) / bacterial cellulose composite material as a wet membrane, and 3) putting the wet membrane into an alkali solution for a reaction and carrying out washing to obtain the MOF-100(Fe) / bacterial cellulose composite material. The MOF-100(Fe) / bacterial cellulose composite material obtained through the cyclic oscillation method has good adsorption effects on organic pollutant diclofenac sodium and is easy to recover and recycle.

Description

technical field [0001] The invention relates to a MOF-100(Fe) / bacterial cellulose composite material and a preparation method and application thereof, belonging to the field of organic-inorganic composite material preparation. Background technique [0002] At present, pharmaceuticals and personal care products (PPCPs) have been listed as "priority control pollutants" because of their wide use, bioaccumulation, toxicity and persistence, and have become another research focus after typical pollutants. Techniques for dealing with PPCPs include physical, biological, and chemical methods. Among them, the operating cost of the membrane separation method is high; the removal effect of the biological method for PPCPs is unstable; the ozone oxidation method has the problems of large investment and high processing cost; the photocatalytic method consumes a lot of energy and is prone to produce a variety of aromatic intermediates during the reaction process. body; the pH range of Fent...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/24B01J20/28B01J20/30C02F1/28C02F101/36
CPCB01J20/24B01J20/28038C02F1/286C02F2101/36
Inventor 郑祥王晋琳程荣申亮杰康敉孔亚东
Owner RENMIN UNIVERSITY OF CHINA
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