South China University of Technology

Zhiqiang Fang

Xueqing Qiu

Dongjie Yang

Weifeng Liu

Hongming Lou

Xinping Ouyang

Yong Qian

Conghua Yi

Yuxia Pang

Jinhao Huang

Zhixian Li

Huan Wang

The present invention belongs to the technical field of biomass carbon materials, and relates to a lignin porous carbon nanosheet, a preparation method therefor, and an application thereof in supercapacitor electrode materials. The method of the present invention performs layer-by-layer self-assembly of sulfonated lignin and oxalate in a selective solvent to prepare a layer-by-layer self-assembled lignin/oxalate composite, which is then carbonized and pickled to obtain the lignin porous carbon nanosheets. The lignin porous carbon nanosheets prepared by the above method of the present invention have a specific surface area of 200-1500 m/g, a micropore specific surface area of 100-500 m/g, a mesoporous specific surface area of 100-1000 m/g, a pore diameter of 0.5-30 nm, and a pore volume of 0.5-1.5 cm/g; they can be applied to supercapacitor electrode materials, showing higher specific capacitance and excellent rate performance (with a specific capacitance retention rate of 76.6%), having good potential application value.

Lignin porous carbon nanosheet, preparation method therefor, and application thereof in supercapacitor electrode materials

A three-dimensional lignin porous carbon/zinc oxide composite material and its preparation and application in the field of photocatalysis are disclosed. The method includes preparing a lignin/zinc oxide precursor composite by a hydrothermal method from a zinc salt, a weak alkali salt and an industrial lignin, and preparing a three-dimensional lignin porous carbon/zinc oxide composite material by high temperature calcination of the lignin/zinc oxide precursor composite. The composite material has a regular three-dimensional pore structure, with zinc oxide nanoparticles uniformly embedded among the three-dimensional lignin porous carbon nanosheets. Application of the composite material to the field of photocatalysis, especially as a photocatalyst for photocatalytic degradation of organic dye pollutants, can significantly improve the degradation efficiency and rate, and has potential application value in the field of photocatalytic degradation of organic pollutants.

Three-dimensional lignin porous carbon/zinc oxide composite material and its preparation and application in the field of photocatalysis

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Guangzhou, China

Zhiqiang Fang