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Preparation method of MIL-101 (Cr)-coated AC composite material and application thereof

A technology of composite materials and activated carbon, which is applied in the direction of chemical instruments and methods, and other chemical processes, can solve the problems of weak interaction, etc., and achieve the effect of increasing micropore volume, reducing pore diameter and pore volume, and low price

Active Publication Date: 2021-09-07
FUJIAN AGRI & FORESTRY UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But since MOF and H 2 The interaction between molecules is weak, and a large number of holes generated in MOF materials are still not used for hydrogen storage

Method used

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  • Preparation method of MIL-101 (Cr)-coated AC composite material and application thereof
  • Preparation method of MIL-101 (Cr)-coated AC composite material and application thereof
  • Preparation method of MIL-101 (Cr)-coated AC composite material and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] 4.034g Cr(NO 3 ) 3 9H 2 O. Add 1.67g of terephthalic acid and 50mg of ball-milled AC to 50ml of deionized water, mix well, then add 1mL of hydrochloric acid (36wt%), stir for 1h, ultrasonic for 40min, pour it into a hydrothermal reaction kettle, and heat it at a temperature of 190 Under the condition of ℃, hydrothermal for 12h, after the reaction was completed, cooled to room temperature, and the green precipitate was obtained by centrifugation. Disperse the precipitate in 50mL N,N-dimethylformamide (DMF) solution and wash 3 times, disperse the washed precipitate in 50ml absolute ethanol (ETOH), and conduct hydrothermal reaction at a temperature of 80°C After 12 hours, after cooling, the product was collected by centrifugation. The resulting product was washed three times with absolute ethanol to completely remove the solvent DMF, and then centrifuged to obtain a solid. The solid was dried in a vacuum oven at 80°C for 12 hours to obtain MIL-101(Cr)@AC powder.

[0036...

Embodiment 2

[0040] 4.035g Cr(NO 3 ) 3 9H 2 O, 1.67g of terephthalic acid and 80mg of ball-milled AC were added to 50ml of deionized water, mixed evenly, then 1mL of hydrochloric acid (36wt%) was added, stirred for 2h, ultrasonicated for 40min, poured into a hydrothermal reaction kettle, and heated at a temperature of 200 Under the condition of ℃, hydrothermal for 12h, after the reaction was completed, cooled to room temperature, and the green precipitate was obtained by centrifugation. Disperse the precipitate in 50mL N,N-dimethylformamide (DMF) solution and wash 3 times, disperse the washed precipitate in 50ml absolute ethanol (ETOH), and conduct hydrothermal reaction at a temperature of 80°C After 12 hours, after cooling, the product was collected by centrifugation. The resulting product was washed three times with absolute ethanol to completely remove the solvent DMF, and then centrifuged to obtain a solid. The solid was dried in a vacuum oven at 85°C for 12 hours to obtain MIL-101...

Embodiment 3

[0043] 4.035g Cr(NO 3 ) 3 9H 2 O, 1.67g of terephthalic acid and 100mg of ball-milled AC were added to 50ml of deionized water, mixed evenly, then 1mL of hydrochloric acid (36wt'%) was added, stirred for 2h, ultrasonicated for 40min, poured into a hydrothermal reaction kettle, at temperature Under the condition of 200 ℃, hydrothermal for 12h, after the reaction was completed, cooled to room temperature, and the green precipitate was obtained by centrifugation. Disperse the precipitate in 50mL N,N-dimethylformamide (DMF) solution and wash 3 times, disperse the washed precipitate in 50ml absolute ethanol (ETOH), and conduct hydrothermal reaction at a temperature of 80°C After 12 hours, after cooling, the product was collected by centrifugation. The resulting product was washed three times with absolute ethanol to completely remove the solvent DMF, and then centrifuged to obtain a solid. The solid was dried in a vacuum oven at 85°C for 12 hours to obtain MIL-101(Cr)@AC powder...

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Abstract

The invention discloses a preparation method and an application of an MIL-101 (Cr)-coated AC composite material, and the preparation method comprises the following steps: firstly, mixing high-speed ball-milled heteroatom self-doped activated carbon, Cr(NO3)3.9H2O, terephthalic acid, hydrochloric acid and deionized water, carrying out ultrasonic treatment, uniformly stirring and mixing, carrying out hydrothermal reaction, cooling, and carrying out centrifugal separation to obtain a green precipitate; and washing the precipitate with DMF, dispersing the washed precipitate in absolute ethyl alcohol, continuing a hydrothermal reaction, cooling, centrifuging, collecting a product, and washing and drying to obtain the MIL-101 (Cr)-coated AC composite material. The preparation conditions are mild, the process is simple, the acid which is low in price and relatively safe is adopted as the modifier, and the production cost and the danger coefficient are greatly reduced; the synthesized MIL-101 (Cr)-coated AC composite material is uniform in size, good in dispersity, high in crystallinity and yield and profound in application prospect in the field of gas adsorption.

Description

technical field [0001] The invention belongs to the field of adsorbents, and in particular relates to a preparation method of a MIL-101(Cr)@AC composite material and its hydrogen storage application. Background technique [0002] Among many new energy sources, hydrogen energy is regarded as an important bridge connecting petrochemical energy and renewable energy. Hydrogen energy has the advantages of abundant resources, high combustion value, large reserves, strong versatility, recyclable utilization, and zero emission of greenhouse gases and pollutants. It is foreseeable that the future world will transform from a carbon-based energy economy to a hydrogen-based energy economy (referred to as "hydrogen economy"). However, hydrogen has not been popularized as a new energy source at present, and the fundamental constraint is that the problem of hydrogen storage is difficult to solve. [0003] Metal-organic frameworks (MOFs) are a new type of molecular-based porous functional...

Claims

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Application Information

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IPC IPC(8): B01J20/22B01J20/30
CPCB01J20/226B01J20/20
Inventor 赵伟刚罗路罗凌聪周亚兰闫雯
Owner FUJIAN AGRI & FORESTRY UNIV
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