Abstract:

Methanol, a basic chemical raw material, is a common solvent in production and one of the common fuels of alcohol fuel cells. However, it is volatile and can cause toxicity to the human nervous system. Therefore, real-time monitoring of the concentration of methanol vapor in the environment is of great significance. In this paper, a comprehensive experiment "a wearable intelligent high selectivity gas-liquid bifunctional methanol electrochemical sensor" was designed on the basis of scientific research achievements. The experiment includes inorganic material synthesis, screen printing preparation, instrumental analysis and characterization, electrochemical sensing and detection, covering the main related knowledge points of several chemistry courses, thus is very comprehensive and cutting-edge. Through this experiment, students can not only consolidate the basic knowledge of chemistry, master the synthesis and characterization skills of graphene materials, but also understand the working principle of electrochemical sensors, which greatly stimulate students' interests in scientific research.

Key words: Wearable sensors, Methanol, Electrochemistry, Vapor/liquid