Preparation and Application Porous TiO_2 for SO_2 Gas Sensor

摘要

Air Pollution become one of serious issue that must be deal with. One of them is SO_2 Pollution. This gas is hazardous even in small concentration and can cause inflammation and irritation on respiratory system. Therefore, it is urgent to made an early detection device that can detect the existence and level of SO_2 concentration. This research was successful to find out the performance of TiO_2 material for detection SO_2 gas. SO_2 gas concentration used is 10 ppm. The TiO_2 material was synthesized using solvothermal method at 180 C by varying the reaction time. Sensitive material is made above the FTO glass. The Material Characterization indicate the structure of TiO_2 is rutile which have round structure that covered by nanorods TiO_2. The size of the diameter of nanorods increases with increasing reaction time. Sensor testing was carried out from 150°C - 350°C using 10 ppm SO_2. The test results showed that the best sensor response was obtained from samples with a reaction time of 12 hours at working temperature of 350°C.