Abstract
Low dimensional MoS2/TiO2 composite was synthesized using hydrothermal method. The structure, morphology and surface characteristics of the MoS2/TiO2 composite were investigated by high resolution transmission electron spectroscopy (HR-TEM), Scanning electron spectroscopy and Raman spectroscopy. HR-TEM imaging established the presence of various defects in the hybrid. Raman spectroscopy established the various Raman modes corresponding to vibrations of various atom in MoS2 and TiO2. Further, successful ethanol vapors sensing at 350 °C established that composite behave like an n-type semiconducting materials. The sensor so obtained has very large (62%) relative response for 100 ppm of ethanol. Corresponding response and recovery times are 52 s and 155 s. These, initial developments may pave the way to think about transition metal dichalcogenides based composites that can be employed to realize gas sensors under ambient conditions.
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