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A method for preparing carbon nanosheets containing hierarchical structure from biomass

A carbon nanosheet and biomass technology, applied in the field of materials, can solve problems such as harsh reaction conditions and environmental pollution, and achieve the effects of solving cost, large-scale preparation, simple and controllable reaction process, and low-cost controllable preparation.

Active Publication Date: 2022-05-20
FUDAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The preparation of carbon nanosheets is mainly through the stripping of carbon-containing materials and the growth of carbon-containing small molecules, which usually requires harsh reaction conditions and will pollute the environment.

Method used

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  • A method for preparing carbon nanosheets containing hierarchical structure from biomass
  • A method for preparing carbon nanosheets containing hierarchical structure from biomass
  • A method for preparing carbon nanosheets containing hierarchical structure from biomass

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] (1) Cut an appropriate amount of radish into pieces and wash with water, then soak in deionized water for 1 h;

[0019] (2) The radish obtained in step (1) is quickly frozen with liquid nitrogen, and freeze-dried in a freeze dryer;

[0020] (3) The dried radish obtained in step (2) was calcined in an air atmosphere at 260 °C for 1 h to obtain a hierarchical carbon material. The heating rate during the calcination process was 10°C / min, and the initial temperature was room temperature; after the calcination, the samples were naturally cooled in an air atmosphere.

Embodiment 2

[0022] (1) Cut an appropriate amount of orange peel into strips, wash with water, and soak in deionized water for 1 hour;

[0023] (2) The orange peel obtained in step (1) is quickly frozen with liquid nitrogen, and freeze-dried in a freeze dryer;

[0024] (3) The dried orange peel obtained in step (2) was calcined in an air atmosphere at 270 °C for 1 h to obtain a hierarchical carbon material. The heating rate during the calcination process was 10°C / min, and the initial temperature was room temperature; after the calcination, the samples were naturally cooled in an air atmosphere.

Embodiment 3

[0026] (1) Cut an appropriate amount of banana peel into pieces and wash with clean water, then soak in deionized water for 1 h;

[0027] (2) The banana peel obtained in step (1) is quickly frozen with liquid nitrogen, and freeze-dried in a freeze dryer;

[0028] (3) The dried banana peel obtained in step (2) was calcined in an air atmosphere at 280 °C for 1 h to obtain a hierarchical carbon material. The heating rate during the calcination process was 10°C / min, and the initial temperature was room temperature; after the calcination, the samples were naturally cooled in an air atmosphere.

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Abstract

The invention provides a method for preparing carbon nanosheets containing hierarchical structures from biomass, that is, a method for preparing carbon nanosheets with a large size and rich in oxygen functional groups and having a hierarchical structure. The method of the present invention uses biomass as a raw material, and prepares carbon nanosheets through the process of rapid heating and carbonization in air. The dried samples were calcined in air to obtain highly conductive three-dimensional carbon materials. The preparation method is simple, efficient, highly controllable, low in cost and does not cause environmental pollution. The carbon nano sheet prepared by the invention can be applied to the fields of photocatalysis, electrocatalysis, energy storage and the like, and the biomass template can be used to synthesize metal and metal oxide two-dimensional nanomaterials.

Description

technical field [0001] The invention belongs to the technical field of materials, and relates to a method for preparing carbon nanosheets containing multi-level structures from biomass, specifically, calcination of freeze-dried biomass at high temperature in a tube furnace to obtain carbon nano-sheets maintaining a multi-level structure . After further high-temperature treatment of the obtained carbon nanosheets, a highly conductive multi-level structure is obtained. Background technique [0002] Carbon materials have good electrical conductivity and can be used as carriers for various photocatalytic and electrocatalytic materials, and can also achieve carbon doping of catalyst materials. The preparation of carbon nanosheets is mainly through the stripping of carbon-containing materials and the growth of carbon-containing small molecules, which usually requires harsh reaction conditions and will pollute the environment. Therefore, there is an urgent need for a simple, cont...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B32/15B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00C01B32/15Y02P20/133
Inventor 卢红斌刘沛莹曹梦婷张佳佳王灿灿吴天琪刘意成潘绍学
Owner FUDAN UNIV
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