Preparation method and application of semiconductor nanoparticle/carbon point porous monolithic catalyst

An integrated catalyst and nanoparticle technology, applied in the fields of electrocatalysis and nanocomposite materials, can solve the problems of easy changes in the surrounding chemical environment, poor water stability of MOFs, loss of stability of materials, etc., to avoid the reduction of active sites and yield. High, active site and activity-increasing effects

Inactive Publication Date: 2019-04-16
UNIV OF JINAN
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

However, MOFs still generally have defects such as poor water stability and poor chemical stability. The easy change of the surrounding chemical

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Embodiment 1. A kind of preparation method of semiconductor nanoparticle / carbon dot porous monolithic catalyst

[0042] (1) Preparation of the precursor mixture of CoNi-MOF / MF containing glucose

[0043] A mixture of 0.20 mmol of cobalt nitrate and 0.20 mmol of nickel nitrate was dissolved in 3 mL of DMF to prepare a mixed solution of nickel nitrate and cobalt nitrate;

[0044] Dissolve 0.35 mmol of glucose in 1.5 mL of water to prepare a glucose solution;

[0045] Blending nickel nitrate, cobalt nitrate solution, and glucose solution to prepare a metal ion mixed solution containing glucose;

[0046] 0.30 mmol terephthalic acid H 2 bdc and 0.30 mmol of triethylenediamine TED were dissolved in 3 mL of DMF, and 0.3 mL of 5% sodium carbonate aqueous solution was added to prepare a ligand solution;

[0047] The 1 cm × 0.5 cm × 1 cm activated melamine foam MF was immersed in the mixed solution containing glucose metal ions, shaken and adsorbed for 20 min, and the ligand m...

Embodiment 2

[0056] Embodiment 2. A kind of preparation method of semiconductor nanoparticle / carbon dot porous monolithic catalyst

[0057] (1) Preparation of the precursor mixture of CoNi-MOF / MF containing glucose

[0058] A mixture of 0.27 mmol of cobalt nitrate and 0.18 mmol of nickel nitrate was dissolved in 3.5 mL of DMF to prepare a mixed solution of nickel nitrate and cobalt nitrate;

[0059] Dissolve 0.37 mmol of glucose in 1.8 mL of water to prepare a glucose solution;

[0060] Blending nickel nitrate, cobalt nitrate solution, and glucose solution to prepare a metal ion mixed solution containing glucose;

[0061] 0.33 mmol terephthalic acid H 2 BDC and 0.33 mmol of triethylenediamine TED were dissolved in 3.5 mL of DMF, and 0.35 mL of 5% sodium carbonate aqueous solution was added to prepare a ligand solution;

[0062] The 1 cm × 0.5 cm × 1 cm activated melamine foam MF was immersed in the mixed solution of glucose-containing metal ions, shaken and adsorbed for 20-30 min, and t...

Embodiment 3

[0069] Embodiment 3. A kind of preparation method of semiconductor nanoparticle / carbon dot porous monolithic catalyst

[0070] (1) Preparation of the precursor mixture of CoNi-MOF / MF containing glucose

[0071] A mixture of 0.35 mmol of cobalt nitrate and 0.15 mmol of nickel nitrate was dissolved in 4 mL of DMF to prepare a mixed solution of nickel nitrate and cobalt nitrate;

[0072] Dissolve 0.40 mmol of glucose in 2.0 mL of water to prepare a glucose solution;

[0073] Blending nickel nitrate, cobalt nitrate solution, and glucose solution to prepare a metal ion mixed solution containing glucose;

[0074] 0.35 mmol terephthalic acid H 2 BDC and 0.35 mmol of triethylenediamine TED were dissolved in 4 mL of DMF, and 0.4 mL of 5% sodium carbonate aqueous solution was added to prepare a ligand solution;

[0075] The 1 cm × 0.5 cm × 1 cm activated melamine foam MF was immersed in the mixed solution containing glucose metal ions, shaken and adsorbed for 30 min, and the ligand m...

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Abstract

The invention discloses a preparation method of a semiconductor nano particle/carbon point porous monolithic catalyst and application of nitrogen fixation to ammonia formation, which belongs to the technical field of nano catalysis, nano materials and the like. The method mainly comprises the following steps of: impregnating and adsorbing a glucose-containing nickel nitrate and cobalt nitrate solution, a ligand solution of terephthalic acid and triethylene diamine by melamine foam in sequence, performing microwave radiation to prepare a CoNi-MOF/melamine foam composite material containing glucose, oxidizing and pyrolyzing the CoNi-MOF/melamine foam composite material, so that a porous monolithic composite material, namely a semiconductor nanoparticle/carbon dot porous monolithic catalyst is prepared by the co-loading semiconductor Co3O4 and NiO nanoparticles and the carbon quantum dots on a carbon-nitrogen matrix. The preparation method has the advantages of low cost of raw materials,simple preparation process, low reaction energy consumption and industrial application prospect. The catalyst is used for electrocatalysis of nitrogen fixation into ammonia and has good electrochemical activity.

Description

technical field [0001] The invention relates to a semiconductor nanoparticle / carbon dot porous integral catalyst and the application of electrocatalytic nitrogen fixation into ammonia based on the catalyst, which belongs to the technical field of nanocomposite materials and electrocatalysis. Background technique [0002] Ammonia is a vital chemical product in human society and is widely used in the production of fertilizers, pharmaceuticals, dyes, etc. At the same time, because of its strong hydrogen content and high energy density, it has also attracted extensive attention as an alternative energy carrier in order to promote the development of a low-carbon society. Therefore, N 2 and H 2 Catalytic synthesis of NH 3 It is considered to be one of "the most important chemical reactions on earth", and its inventors, F. Haber and C. Bosch, also deservedly won the Nobel Prize in Chemistry. This method is the famous "Haber-Bosch" method. However, the realization of industrial...

Claims

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Application Information

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IPC IPC(8): B01J31/28B01J35/10C25B1/00C25B11/06
CPCB01J31/28B01J35/0033B01J35/10C25B1/00C25B11/091
Inventor 童磊王志玲
Owner UNIV OF JINAN
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