Method for detecting content of carbon and sulfur in graphene based on high temperature combustion infrared absorption process

Abstract

The invention belongs to the technical field of analysis detection of the content of important elements carbon and sulfur in graphene, and especially relates to a method for detecting the content of carbon and sulfur in graphene based on a high temperature combustion infrared absorption process. The method comprises the following steps: 1, preparing a high temperature combustion infrared carbon and sulfur analyzer; 2, preparing and weighing a sample; 3, establishing a working curve by using a coal reference substance; and 4, analyzing a compacted graphene sample. The carbon analysis precision reaches 1%, the sulfur analysis precision reaches 2%, obtained results accord with production technology expectation, the precisions meet analysis requirements, the demand of graphene manufacturers for the control and the improvement of the product quality is met, and the gap in the graphene test field is filled.

Description

technical field [0001] The invention belongs to the technical field of analysis and determination of carbon and sulfur content of important elements in graphene, and in particular relates to a method for rapidly and accurately measuring carbon and sulfur content in graphene based on a high-temperature combustion infrared absorption method. Background technique [0002] As an emerging material, graphene is known as the thinnest, hardest, and best conductive material. It has the characteristics of super-extreme thermal and electrical conductivity, strong and transparent. It can replace traditional materials and become a new material with the most industrial development value. Industrial applications have been realized in many fields such as semiconductors, batteries, chips, energy storage materials, sensors, touch devices, conductive ink pastes, and composite materials. With the advancement of technology, the requirements for the quality of graphene products are also getting h...

AI Technical Summary

Problems solved by technology

[0003] Conventional carbon and sulfur analysis uses the principle of high-frequency induction heating-infrared absorption to detect carbon and sulfur in the sample. Due to the design characteristics of this type of instrument, the heating space structure of the high-frequency combustion reaction chamber is narrow, and the oxygen flow is rapid during heating. Burns instantaneously and reacts violently. Graphene is a two-dimensional material with a thickness of only one carbon atom. The specific gravity of the sample is very light. Under the rapid blowing of the oxygen flow, it is easy to cause burning and splashing, resulting in sample loss.

In addition, there is a lack of corresponding reference materials to calibrate instruments

Therefore, the accuracy and precision of conventional carbon and sulfur analysis and determination equipment and methods cannot meet the testing requirements of graphene product quality control

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