Abstract
A room-temperature hydrogen gas sensor based on T1O2/M0S2 nanocomposite which synthesized by the hydrothermal process was investigated. The nanocomposite was the flowerlike MoS2 nanosheets adhering on end surfaces of the porous TiO2 nanorods. The sensing properties of the TiO2/MoS2 based sensor to hydrogen were investigated at room temperature and compared with the sensing properties of the sensor based on pure TiO2 nanorods. The nanocomposite-based sensor has the sensing response(S) of 4.25% to 200 ppm hydrogen at 25 °C, which was about 80 times higher than the sensing response(S) of the pure TiO2 nanorod-based sensor. The response time of the nanocomposite-based sensor was about 96 s, and the recovery time was about 54 s to 200 ppm hydrogen at 100 °C. The enhanced sensing response(S), rapid response and recovery characteristics were attributed to the structural characteristics of the nanocomposite and the formed p-n junction between TiO2 and MoS2.
Published Version
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