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Nitrogen-doped porous carbon loaded ZnS nano composite material as well as preparation method and application thereof

A nanocomposite material, nitrogen-doped porous carbon technology, applied in reductive alkylation preparation, chemical instruments and methods, organic chemistry, etc., can solve problems such as limiting large-scale preparation and application, and achieve good photothermal conversion performance, Good catalytic activity and the effect of improving photothermal catalytic activity

Inactive Publication Date: 2020-05-15
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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  • Nitrogen-doped porous carbon loaded ZnS nano composite material as well as preparation method and application thereof
  • Nitrogen-doped porous carbon loaded ZnS nano composite material as well as preparation method and application thereof
  • Nitrogen-doped porous carbon loaded ZnS nano composite material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
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 nano composite material as well as a preparation method and application thereof. The preparation method comprises the steps: dissolving and dispersing zinc salt and sulfur-containing proteins into water; freeze drying and carrying out pyrolysis, to obtain the nitrogen-doped porous carbon loaded ZnS nano composite material. In the preparation process of the composite material, a template agent or acid-base does not need to be introduced for post-treatment; and the obtained nano composite material has a large number of pore passage structures, rich Lewis acid and alkaline sites and good photothermal conversion performance, shows excellent selectivity and high catalytic activity when being applied to CO2 cycloaddition reactionand methylation reaction under light driving, and has a wide prospect 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 Applications(China)
IPC IPC(8): B01J27/24B01J35/02B01J35/10C07C209/28C07C211/04C07D317/64
CPCB01J27/24C07D317/64C07C209/28B01J35/50B01J35/618B01J35/635B01J35/647B01J35/39C07C211/04
Inventor 刘又年方银唐飞鹰王立强马凌
Owner CENT SOUTH UNIV
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