Three-dimensional patterned porous graphene black body and preparation method and application thereof

Abstract

The invention discloses a short-pulse or ultra-short-pulse laser direct gasification method. The construction of a three-dimensional patterned multilevel structure of a carbonaceous material is realized, and a carbonaceous black-body-like material is prepared and applied to the fields of wide-spectrum light absorption, super-capacitors, nano-catalysis and the like. The invention relates to the technical field of solar energy or spectral absorption and utilization, battery energy, environmental management and the like. The carbonaceous material mainly comprises formed biomass carbon, carbonaceous sponge, gel, a film and the like. According to the patterned and three-dimensional structure, the surface of the carbonaceous material can be locally machined in a short-pulse laser nanometer gasification mode according to the design requirement, local direct gasification of the carbonaceous material is achieved, and meanwhile, amorphous carbon is converted into a black-body-like graphene structure with a three-dimensional shape. According to the invention, the amorphous carbonaceous material can realize crystal transformation, the amorphous carbonaceous material has the characteristics of high conductivity, high surface roughness, strong optical absorption, high specific surface area and the like, and the spectral absorption and transformation capability and the energy utilization efficiency can be remarkably improved.

Description

technical field [0001] The invention belongs to the technical field of material preparation, and in particular relates to a three-dimensional patterned porous graphene-like black body prepared by a short-pulse laser processing method, a preparation method and an application thereof. Background technique [0002] Graphene is a new type of two-dimensional layered material composed of single-layer carbon atom lattice arrangement. New materials, especially three-dimensional graphene-like blackbody materials, have broad application prospects in many fields such as optoelectronics, composite materials, energy storage, energy capture, thermal management, and catalysis. [0003] So far, various graphene preparation methods such as mechanical exfoliation, ultrasonic exfoliation, chemical synthesis, chemical vapor deposition, and graphite oxide reduction have been developed. However, these preparation methods can only produce graphene with a small size. , it is impossible to obtain p...

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Problems solved by technology

However, this patent has the following disadvantages: 1) the price of polyimide material is high and the variety is single; 2) it is difficult to realize the fine processing of the nano-microstructure of the material by laser, and it is impossible to form a three-dimensional black body-like nano-microstructure

At present, this technology mainly relies on nanomaterials that are relatively expensive and have complex preparation processes. Therefore, nanomaterials that are cheap and easy to obtain, have excellent light absorption properties, and a well-developed pore structure, and their low-cost and high-efficiency preparation methods are an inevitable demand.

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