Preparation method of CuO/WO3 composite material for H2S detection

The invention discloses a preparation method of a CuO/WO3 composite material for H2S detection, and belongs to the technical field of metal semiconductor gas sensors. The invention aims to provide the preparation method of the CuO/WO3 composite material for H2S detection, which is used for synthesizing the CuO/WO3 composite material by adopting a simple hydrothermal method and can efficiently and accurately detect H2S gas. The preparation method comprises the following steps: adding WO3 hollow sphere powder into a mixed solution of deionized water and absolute ethyl alcohol, uniformly stirring by using a magnetic stirrer to obtain a yellow solution, then adding Cu (NO3) 2.3 H2O, continuously stirring, adding the mixed solution into a polytetrafluoroethylene high-pressure reaction kettle, transferring into a drying oven, heating for hydrothermal reaction, and naturally cooling to room temperature after the reaction is finished, so as to obtain the WO3/Cu composite photocatalyst. And pouring out the supernatant