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Biomass waste residue-based monatomic metal catalyst as well as preparation method and application thereof

A metal catalyst and biomass technology, which is applied in the field of biomass waste residue-based single-atom metal catalyst and its preparation, can solve the problems of unfavorable single-atom catalyst for large-scale production and application, high cost, harsh preparation conditions, etc. Utilization rate, the effect of simple preparation process

Pending Publication Date: 2022-03-22
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these methods are only suitable for two-dimensional materials and metal MOF frameworks as catalyst supports. The preparation conditions are harsh and the cost is high, which is not conducive to the large-scale production and application of single-atom catalysts.

Method used

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  • Biomass waste residue-based monatomic metal catalyst as well as preparation method and application thereof
  • Biomass waste residue-based monatomic metal catalyst as well as preparation method and application thereof
  • Biomass waste residue-based monatomic metal catalyst as well as preparation method and application thereof

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preparation example Construction

[0028] The invention provides a method for preparing a biomass waste slag-based single-atom metal catalyst such as figure 1 As shown, the method includes the following steps:

[0029] 1) Drying, pulverizing, and sieving the biomass waste residue to obtain waste residue powder, and then performing oxygen-limited pyrolysis to obtain biochar;

[0030] 2) mixing the biochar with potassium hydroxide solution, stirring, then drying, and then performing secondary pyrolysis under oxygen-limited conditions to obtain porous carbon;

[0031] 3) Dissolve the metal precursor and o-phenanthroline in an organic solvent, then add porous carbon, stir, and then dry to obtain a powder, mix the powder with a cyanamide compound evenly, and sinter in a protective atmosphere, that is A biomass waste slag-based single-atom metal catalyst is obtained.

[0032] In step 1), the biomass waste residue includes one or more of furfural residue, biogas residue, activated sludge, and coffee grounds, and the...

Embodiment 1

[0038] 1. Preparation of biochar

[0039] After drying 10g of furfural slag, crush it with a crusher and pass through a 200-mesh sieve to obtain finely divided furfural slag powder, transfer it to a crucible to fill it up, and pyrolyze it at 600°C for 2 hours with limited oxygen to obtain biochar.

[0040] 2. Preparation of porous carbon carrier

[0041] 6g of biochar and 500mL of 0.42mol / L KOH mixed solution were stirred for 0.5h, then transferred to an oven for drying, then transferred to a crucible, and pyrolyzed at 800°C for 2h under oxygen-limited conditions to obtain porous carbon.

[0042] 3. Preparation of biomass waste residue-based monatomic iron catalyst

[0043] 0.4mmol of ferrous acetate and 2.0mmol of o-phenanthroline monohydrate were dissolved in 50mL of ethanol to obtain a mixed solution, 300mg of porous carbon was placed in the mixed solution and stirred for 0.5h, then dried to obtain a powder, which was mixed with melamine in a mass ratio of 1:4 Grind in a ...

Embodiment 2

[0047] 1. Preparation of biochar

[0048] After drying 20g of furfural slag, crush it with a crusher and pass through a 100-mesh sieve to obtain finely divided furfural slag powder, transfer it to a crucible to fill it up, and pyrolyze it at 700°C for 3 hours with limited oxygen to obtain biochar.

[0049] 2. Preparation of porous carbon carrier

[0050] Stir 10 g of biochar with 200 mL of 1.8 mol / L KOH mixed solution for 1 h, transfer to an oven for drying, then transfer to a crucible for compaction, and pyrolyze at 800 °C for 3 h under oxygen-limited conditions to obtain porous carbon.

[0051] 3. Preparation of biomass waste residue-based single-atom cobalt catalyst

[0052] 0.6mmol of cobaltous acetate and 3.0mmol of o-phenanthroline monohydrate were dissolved in 30mL of ethanol to obtain a mixed solution, 500mg of porous carbon was placed in the mixed solution and stirred for 0.5h, and then dried to obtain a powder, which was mixed with melamine in a mass ratio of 1:5 G...

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Abstract

The invention relates to a biomass waste residue-based monatomic metal catalyst and a preparation method and application thereof, the preparation method comprises the following steps: 1) drying, crushing and sieving biomass waste residues to obtain waste residue powder, and then performing oxygen-limited pyrolysis to obtain biomass charcoal; 2) mixing the biomass charcoal with a potassium hydroxide solution, stirring, drying, and carrying out secondary pyrolysis under a limited oxygen condition to obtain porous charcoal; and 3) dissolving the metal precursor and o-phenanthroline in an organic solvent, then adding the porous carbon, stirring, then drying to obtain powder, uniformly mixing the powder with a cyanamide compound, and sintering in a protective atmosphere. Compared with the prior art, the biomass waste residue-based monatomic metal catalyst prepared by taking the porous carbon prepared by pyrolyzing the biomass waste residues as the carrier shows excellent activity and stability, can meet the requirements of application and development in related fields, and particularly has high oxidation activity on organic pollutants.

Description

technical field [0001] The invention belongs to the technical field of catalysts, and relates to a biomass waste slag-based single-atom metal catalyst and a preparation method and application thereof. Background technique [0002] Single-atom catalysis is one of the hotspots in the field of heterogeneous catalysis. Single-atom catalyst refers to the metal (M) active site in the catalyst combined with heteroatoms such as N / P / S / O in the form of coordination bonds and fixed on the surface of the catalyst support, the active sites are highly dispersed, and there is no M-M Metal keys. Compared with traditional catalysts, single-atom catalysts have significant advantages: low metal loading, which minimizes the leaching of metal ions; the exposure of the active site of a single metal atom greatly improves the utilization of active metal atoms; the active metal and The interaction on the surface of the catalyst support is more conducive to the transfer of electrons, and the doping...

Claims

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Application Information

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IPC IPC(8): B01J23/72B01J23/745B01J23/75B01J27/24B01J35/00B01J37/08C02F1/72C02F101/30
CPCB01J23/745B01J27/24B01J37/084B01J23/72B01J23/75C02F1/725C02F2101/30B01J35/391
Inventor 沈国清王晨刘焕然孙鹏李晓颖陈钦程
Owner SHANGHAI JIAO TONG UNIV
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