Method for preparing biomass graphene by extracting cellulose from wheatgrass

Abstract

The invention belongs to the technical field of graphene materials and particularly provides a method for preparing biomass graphene by extracting cellulose from wheatgrass. The method comprises the steps of S1, cellulose preparation, S2, catalyst solution preparation, S3, precursor preparation by high-temperature deoxidation, S4, carbonization heat treatment and S5 acid treatment and drying. Themethod takes the cheap cellulose with a wide source as a carbon source to prepare the graphene; when the yield is increased, the production cost is lowered; and the method has a series of advantages that a preparation technology is simple, the method is low in cost and high in yield, the production safety is high, the product size and physical properties are controllable, and industrial productioncan be achieved.

Description

technical field [0001] The invention belongs to the technical field of graphene materials, in particular to a method for preparing graphene, in particular to a method for preparing biomass graphene by using wheat straw cellulose as a raw material. Background technique [0002] Biomass is a natural cellulosic raw material considered to be the most valuable and abundant renewable resource on earth. In China, the annual production rate of natural cellulose biomass exceeds 700 million tons, of which corncobs and straw account for more than 30%. Biomass is rich in nutritional value and useful chemical components. Although it is widely used in industry, agriculture and animal husbandry, more than 50% of biomass has not been utilized. At present, my country lacks comprehensive measures for the effective utilization of biomass (corncobs and straw, etc.), which often causes serious air pollution, which also leads to frequent occurrence of smog and high concentration of fine particle...

AI Technical Summary

Problems solved by technology

Graphene produced by CVD is suitable for electronic devices, but usually requires harsh reaction conditions, expensive equipment, long cycle, and low yield, and is not suitable for large-scale applications similar to those in the field of electrode materials.

The amount of strong oxidant (concentrated sulfuric acid, potassium permanganate, etc.) required by the graphite oxide reduction method is dozens of times that of graphite raw materials, resulting in serious environmental pollution

High production cost, which greatly limits the process of its industrialization

[0004] In summary, the existing graphene preparation methods have problems such as complex process, poor production safety, high production cost, complex equipment required for the reaction, harsh reaction conditions, and low yield, making it difficult for industrial production