Amorphous Molybdenum Disulfide Thin Film for Photocatalysis and Gas Sensing Applications

Abstract

Amorphous MoS2 thin films have been prepared by thermal deposition on glass, quartz, and FTO substrates and investigated by UV-VIS – NIR spectroscopy. The type of substrate has a minor impact on the film's spectral absorption and band gap values. The investigation of MB – dye degradation by MoS2 catalyst under UV – irradiation demonstrates high efficiency of 86%. MoS2 films deposited on glass substrates have been experienced as CO2, HCl, and I2 gas sensors. The films revealed promises for CO2 sensing at high temperatures (T 300 ) in terms of relatively good response (  and moderate recovery of 12 min. Besides, MoS2 films revealed a quick response within 1 min for both HCl and I2 gases, while their entire recovery needs a time period longer than one hour.