Nitrogen-doped carbon material loaded with aluminum single atoms as well as preparation method and application thereof

A nitrogen-doped carbon and atom technology, applied in chemical instruments and methods, organic compound/hydride/coordination complex catalysts, organic chemistry, etc., can solve problems such as separation and recycling difficulties, and overcome reaction energy barriers , good photothermal absorption and conversion, excellent photothermal conversion performance

Active Publication Date: 2021-10-22
QIANWAN INST OF CNITECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In general, homogeneous catalysts have excellent catalytic activity, but have inherent difficulties in separation and recycling

Method used

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  • Nitrogen-doped carbon material loaded with aluminum single atoms as well as preparation method and application thereof
  • Nitrogen-doped carbon material loaded with aluminum single atoms as well as preparation method and application thereof
  • Nitrogen-doped carbon material loaded with aluminum single atoms as well as preparation method and application thereof

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preparation example Construction

[0047] An aspect of the embodiments of the present invention provides a method for preparing a nitrogen-doped carbon material supporting aluminum single atoms, including:

[0048] providing a first solution comprising 1,10-phenanthroline and a solvent;

[0049] providing a second solution comprising an aluminum source and a solvent;

[0050] mixing the first solution and the second solution, and then quickly mixing with melamine for grinding while removing the solvent to obtain a solid composite;

[0051] Under an inert atmosphere, the solid composite is sequentially subjected to a first calcination treatment and a second calcination treatment to obtain a nitrogen-doped carbon material supporting aluminum single atoms.

[0052] In some embodiments, the aluminum source includes aluminum nitrate, preferably aluminum nitrate nonahydrate, but not limited thereto.

[0053] Further, the solvent may be ethanol, but not limited thereto.

[0054] In the present invention, the invent...

Embodiment 1

[0090] Example 1 Synthesis of a nitrogen-doped carbon material supporting aluminum single atoms (14wt%)

[0091] The concrete steps of this embodiment are as follows:

[0092] First, dissolve 0.6mmol of 1,10-phenanthroline with 9mmol of absolute ethanol, and dissolve 0.6mmol of aluminum nitrate nonahydrate with 30mmol of absolute ethanol, and then quickly mix the two mixed solutions to form a white turbidity. It is caused by the precipitation formed by the coordination and chelation of N in 1,10-phenanthroline and positive trivalent Al. This step is very important for the uniform and high dispersion of Al in the form of single atom in the material synthesized by the present invention. Then the white turbidity was quickly placed in a mortar with 16 mmol melamine, and then gradually ground to dryness at room temperature. Take an appropriate amount of the dried white mixture and put it in a porcelain boat, first anneal it in a tube furnace at 550°C for 2 hours, the heating rate ...

Embodiment 2

[0096] Example 2 Synthesis of a nitrogen-doped carbon material supporting aluminum single atoms (10wt%)

[0097] The concrete steps of this embodiment are as follows:

[0098] First, dissolve 3.6mmol of 1,10-phenanthroline with 36mmol of isopropanol, and dissolve 0.6mmol of aluminum nitrate nonahydrate with 36mmol of isopropanol, and then quickly mix the two mixed solutions to form a white turbidity. It is caused by the precipitation formed by the coordination and chelation of N in 1,10-phenanthroline and positive trivalent Al. This step is very important for the uniform and high dispersion of Al in the form of single atom in the material synthesized by the present invention. Then the white turbidity was quickly placed in a mortar with 30mmol melamine, and then gradually ground to dryness at room temperature. Take an appropriate amount of the dried white mixture and place it in a porcelain boat, first anneal it in a tube furnace at 500°C for 3 hours, the heating rate is 2°C / m...

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Abstract

The invention discloses a nitrogen-doped carbon material loaded with aluminum single atoms as well as a preparation method and application thereof. The preparation method comprises the following steps: providing a first solution containing 1, 10-phenanthroline and a solvent, and a second solution containing an aluminum source and a solvent; mixing the first solution and the second solution, and then rapidly mixing with melamine, and grinding until the mixture is dry to obtain a solid compound; and sequentially carrying out first calcination and second calcination treatment on the solid compound in an inert atmosphere so as to obtain the nitrogen-doped carbon material loaded with the aluminum single atoms. In the nitrogen-doped carbon material loaded with the aluminum single atoms, aluminum is uniformly dispersed in a single atom state with high content, and aluminum and nitrogen form a coordination structure of AlN4. The preparation method of the nitrogen-doped carbon material loaded with the aluminum single atoms is simple, and the material structure is stable; the catalyst can be repeatedly used for five times or more, and the activity of the catalyst is basically unchanged; and meanwhile, the catalyst has the characteristics of good photo-thermal absorption and conversion, and is a stable, efficient and environment-friendly heterogeneous catalyst.

Description

technical field [0001] The invention belongs to the technical field of catalysts, and relates to a nitrogen-doped carbon material supporting aluminum single atoms, in particular, it relates to a carbon material supporting aluminum single atoms that can catalyze the synthesis of cyclic carbonate under photothermal conditions and has high catalytic activity. Nitrogen-doped carbon material and its preparation method and application. Background technique [0002] Rising greenhouse gases (mainly carbon dioxide) are the root causes of global warming and ocean acidification. Therefore, there is an urgent need to suppress the rising CO2 in the atmosphere based on CO2 capture and conversion. Despite the adverse effects of carbon dioxide, as a non-toxic, abundant, and renewable C1 resource, carbon dioxide can be used to prepare various high value-added chemical products, such as methanol, amides, and cyclic carbonates. The cycloaddition reaction of epoxides and carbon dioxide for th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24B01J31/18B01J35/00C07D317/36
CPCB01J27/24B01J35/0046B01J35/004B01J31/1805C07D317/36B01J2531/31
Inventor 陈亮陆之毅杨其浩张秋菊彭怀涛林贻超
Owner QIANWAN INST OF CNITECH
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