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A nitrogen-doped porous carbon-supported zns nanocomposite material and its preparation method and application

A technology of nitrogen-doped porous carbon and nanocomposite materials, applied in chemical instruments and methods, reductive alkylation preparation, physical/chemical process catalysts, etc., can solve problems that limit large-scale preparation and application

Inactive Publication Date: 2021-04-20
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the carbon dioxide molecule, the bond energy of the C=O bond is as high as ~750kJ mol -1 , which enables the activation and utilization of CO 2 challenging
However, templates need to be introduced during the cleavage process, which may limit large-scale preparation and application

Method used

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  • A nitrogen-doped porous carbon-supported zns nanocomposite material and its preparation method and application
  • A nitrogen-doped porous carbon-supported zns nanocomposite material and its preparation method and application
  • A nitrogen-doped porous carbon-supported zns nanocomposite material and its preparation method and application

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Experimental program
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Effect test

Embodiment 1

[0036] Preparation of sample NPC: BSA was dissolved in water, and after drying by freeze dryer, the obtained solid was transferred into a tube furnace and pyrolyzed under nitrogen flow. First at 10°C min -1 The heating rate of the sample is heated to 500 ° C, and then at 5 ° C min -1 The heating rate was heated to 800 °C, and kept at 800 °C for 2 h, then cooled to room temperature, and the obtained sample was named NPC.

Embodiment 2

[0038] Preparation of catalyst sample ZnS / NPC-1: ZnCl 2 and BSA dissolved in water (ZnCl 2 The mass ratio to BSA is 1.5:1), after drying by freeze dryer, the obtained solid was transferred into a tube furnace and pyrolyzed under nitrogen flow. First at 10°C min -1 The heating rate of the sample is heated to 500 ° C, and then at 5 ° C min -1 The heating rate was heated to 800 °C, and kept at 800 °C for 2 h, then cooled to room temperature, and the obtained sample was named ZnS / NPC-1.

Embodiment 3

[0040] Preparation of catalyst sample ZnS / NPC-2: ZnCl 2 and BSA dissolved in water (ZnCl 2 The mass ratio to BSA is 2.25:1), after drying by freeze dryer, the obtained solid was transferred into a tube furnace and pyrolyzed under nitrogen flow. First at 10°C min -1 The heating rate of the sample is heated to 500 ° C, and then at 5 ° C min -1 The heating rate was heated to 800°C, and kept at 800°C for 2h, then cooled to room temperature, and the obtained sample was named ZnS / NPC-2.

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Abstract

The invention discloses a nitrogen-doped porous carbon-loaded ZnS nanocomposite material, a preparation method and application thereof. After dissolving and dispersing zinc salt and sulfur-containing protein in water, freeze-drying and pyrolysis, nitrogen-doped porous carbon-supported ZnS nanocomposites can be obtained. The preparation process of the composites does not require the introduction of templates or acid-base post-treatment. Moreover, the obtained nanocomposite has a large number of pore structures, abundant Lewis acids, basic sites, and good photothermal conversion performance, which can be applied to the light-driven CO 2 Cycloaddition reactions and methylation reactions show excellent selectivity and high catalytic activity, and have broad prospects in the field of photothermal catalytic materials.

Description

technical field [0001] The invention relates to a catalytic material, in particular to a nitrogen-doped porous carbon-loaded ZnS nanocomposite material, and to utilizing protein-zinc ions (Zn 2+ ) complex networks as precursors for constructing N-doped porous carbon-supported ZnS catalysts, and involving nitrogen-doped porous carbon-supported ZnS nanocomposites for CO 2 The application of photothermal catalytic conversion belongs to the technical field of photothermal catalytic materials. Background technique [0002] Currently, carbon dioxide (CO 2 ) has caused serious environmental problems, such as global warming and ocean acidification. On the other hand, CO 2 It is also an important C1 resource, which can be used to synthesize a variety of high value-added chemicals, such as carbonates, carboxylic acid derivatives, alcohols, N-methylamine derivatives, etc. However, carbon dioxide is extremely chemically stable. In the carbon dioxide molecule, the bond energy of the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/24B01J35/02B01J35/10C07C209/28C07C211/04C07D317/64
CPCB01J27/24B01J35/004B01J35/026B01J35/1028B01J35/1042B01J35/1061C07C209/28C07D317/64C07C211/04
Inventor 刘又年方银唐飞鹰王立强马凌
Owner CENT SOUTH UNIV
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