Abstract: The properties of gas sensors prepared in the experimental course do not satisfy the need for practical application due to the dated content and method of experiment used． To solve that problem and meet the need that the contents of experiments should relate to scientific research，the experiment of preparing and gas sensing properties of semiconductor gas sensing material are studied to enhance the properties of gas sensors． Ternary metal oxide Zn2SnO4 was prepared by solvothermal method and the sensing properties were measured systemically． This experiment content was applied as an open innovative experiment for the course of electronic functional material experiment． The results show that the prepared Zn2SnO4 based sensors exhibited excellent response to formaldehyde． Through the practical process，the students mastered a new method of preparing
nanomaterials and learned the characterization methods． The application result demonstrates that this experiment can help developing scientific research quality and innovation ability．

Key words: electronic functional materials, gas sensor, solvothermal, ternary metal oxide