The Discussion on the Influencing Factors of Carbon, Hydrogen, Nitrogen, Sulfur and Oxygen Content in Graphene Powder Determined by Element Analyzer

Abstract

Graphene, with excellent electrical, optical, mechanical, thermal and other properties, is the frontier of our new materials focus on the development of the field. Graphene powder is one of the main product forms of graphene materials in the current market, it has been widely studied and applied in many fields, such as conductive material, energy storage material, anticorrosion material, electrothermal material, composite material and so on. At present, the content of carbon, hydrogen, nitrogen, sulfur and oxygen in graphene powder varies greatly due to different preparation processes and raw materials, and then directly to its follow-up application and modification of a huge impact. Therefore, accurate determination of the content of major elements in graphene powder has an important effect on its application. As a kind of equipment which can accurately measure the element content, the element analyzer is often used to measure the content of carbon, hydrogen, oxygen, nitrogen and sulfur in the graphene material, but in the daily testing process, less attention is paid to the influence of sample pretreatment and other factors on the test results, therefore, in this paper, the effects of constant weight pretreatment, sample weighing, packing material and gas flow rate on the results were investigated, the testing conditions of carbon, hydrogen, nitrogen, sulfur and oxygen in graphene powder by element analyzer were optimized.