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Preparation method and application of carbon quantum dot/metal organic skeleton catalyst

A metal-organic framework, carbon quantum dot technology, applied in organic compound/hydride/coordination complex catalysts, physical/chemical process catalysts, catalytic reactions, etc., can solve problems such as low activity, and achieve a simple synthesis process, Highly maneuverable, easy-to-adjust effects

Active Publication Date: 2018-03-06
FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] To solve the current photocatalytic reduction of CO by single metal organic framework 2 For the problem of low activity, we combined the amidated me

Method used

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  • Preparation method and application of carbon quantum dot/metal organic skeleton catalyst
  • Preparation method and application of carbon quantum dot/metal organic skeleton catalyst
  • Preparation method and application of carbon quantum dot/metal organic skeleton catalyst

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0024] Example 1:

[0025] (1) Preparation of carbon quantum dots:

[0026] Add 500 mL of deionized water to a 500 mL beaker, put two graphene electrodes into the above beaker with a distance of 7 cm, and apply 30V direct current. After two weeks of electrolysis, the clear and colorless water becomes a black aqueous solution. After filtering the black aqueous solution with filter paper, it was centrifuged at a speed of 20,000 rpm for one hour, and the supernatant was taken. The supernatant is dried by rotary evaporation to obtain the required carbon quantum dots.

[0027] (2) Preparation of aqueous solution of carbon quantum dots:

[0028] Take 25 mg of carbon quantum dots and add 5 mL of water to obtain a 0.5 mg / mL solution.

[0029] (3) Catalyst NH 2 -Preparation of MIL-88(Fe):

[0030] 0.32 g of surfactant F127 was dissolved in 26.7 mL of deionized water, and 3.3 mL of 0.4 M ferric chloride aqueous solution was added to the above solution, and stirred for 1.5 hours. Then 0.6 mL of ...

Example Embodiment

[0034] Example 2:

[0035] NH 2 -MIL-88(Fe) catalyst photocatalytic reduction of CO 2 Performance evaluation: take 10mg NH 2 -MIL-88(Fe) catalyst is uniformly dispersed on the quartz filter membrane, placed in a solid-gas photocatalytic reaction device, and 2mL of a mixture of acetonitrile and triethanolamine (the volume ratio of acetonitrile to triethanolamine is 4:1) Vacuum and charge CO 2 After that, the reaction was allowed to equilibrate in a dark environment for 1 hour. Subsequently, the reaction device was placed under a 300W visible light lamp, and the CO concentration was measured every two hours.

Example Embodiment

[0036] Example 3:

[0037] Carbon quantum dot / NH 2 -MIL-88(Fe) photocatalytic reduction of CO 2 Performance evaluation: take 10mg carbon quantum dots / NH 2 -MIL-88(Fe) catalyst is uniformly dispersed on the quartz filter membrane, placed in a solid-gas photocatalytic reaction device, and 2mL of a mixture of acetonitrile and triethanolamine (the volume ratio of acetonitrile to triethanolamine is 4:1) Vacuum and charge CO 2 After that, the reaction was allowed to equilibrate in a dark environment for 1 hour. Subsequently, the reaction device was placed under a 300W visible light lamp, and the CO concentration was measured every two hours.

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Abstract

The invention belongs to the field of new energy resources and particularly relates to a method for compounding a carbon quantum dot with a metal organic skeleton material. A catalyst prepared by virtue of the method is applied to the reduction preparation of CO through photocatalysis of CO2. For solving the problem that the activity of CO2 obtained through photocatalytic reduction of a single metal organic skeleton at present is low, an aminated metal organic skeleton material and the carbon quantum dot with carboxylic acid are combined to obtain a catalyst, and the obtained catalyst is usedfor preparing CO from CO2 through high-efficiency photocatalytic reduction. The catalyst can simultaneously have the advantages of the metal organic skeleton and the carbon quantum dot and further hasvery high photocatalytic reaction activity due to the synergistic effect of the metal organic skeleton and the carbon quantum dot. The constitution components of the catalyst are easily adjusted, andthe metal organic skeleton material with amino and the carbon quantum dot with carboxylic acid can be arbitrarily selected. The method is simple in synthesis process flow and strong in operability and has wide application prospects.

Description

technical field [0001] The invention belongs to the field of new energy, and specifically relates to a method for compounding carbon quantum dots and metal-organic framework materials, and applying the catalyst prepared by the method to photocatalyze CO 2 Reduction produces CO. Background technique [0002] In recent years, the combustion of a large number of fossil fuels has emitted a large amount of CO 2 , and these CO 2 It is the greenhouse gas, which makes the global temperature rise and the ecological imbalance. How to convert CO 2 Scientists have been thinking about how to capture and utilize it, and then convert it into clean new energy. [0003] Metal-organic framework materials, as an emerging porous material with high porosity, high specific surface area, adjustable structure and function, have already had some applications in gas adsorption. Carbon quantum dots can absorb light from ultraviolet to near infrared, and also have good luminescence and electron co...

Claims

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Application Information

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IPC IPC(8): B01J31/22C01B32/40
CPCB01J31/1691B01J31/1805B01J35/004B01J2231/62B01J2531/842
Inventor 王旭生徐睿陈春辉黄远标曹荣
Owner FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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