Mass spectrometry device for in-situ gas-solid phase photocatalytic reaction

The invention relates to a mass spectrometry device for in-situ gas-solid phase photocatalytic reaction, and relates to the technical field of mass spectrometry. Comprising a photo ionization time-of-flight mass spectrometry device and an in-situ photocatalytic reactor which are connected through a differential chamber. The in-situ photocatalytic reactor comprises a catalyst placing mechanism, a reaction light source, an inlet pipe and an outlet pipe; the improved catalyst placing mechanism comprises a flat-plate-shaped fixed bed and a hollow closed plate-shaped shell which are both made of quartz materials; the reaction light source is positioned above the plate-shaped shell, and the light emitting surface corresponds to the working surface of the fixed bed; one side edge of the plate-shaped shell is communicated with an inlet pipe, the other side edge of the plate-shaped shell is communicated with an outlet pipe, and a sand core is arranged in the outlet pipe. According to the invention, more in-situ sampli