Effects of MWCNTs/graphene nanoflakes/MXene addition to TiO2 thick film on hydrogen gas sensing

Various doping materials, such as MWCNTs, graphene nanoflakes and MXene, have been doped into TiO2 the hydrogen sensing properties investigated. Using a similar volume, MWCNTs (5 wt.%) MXene (10 were added to prepared in paste form by mixing material with organic binder. The film was deposited on an alumina substrate using screen-printing technique annealed at 500 °C for 30 min ambient air. crystallinity of after annealing treatment verified FESEM, EDX, XRD Raman Spectroscopy. By depositing interdigitated electrode bottom film, thick gas sensors (TiO2/MWCNT, TiO2/Gr, TiO2/MXene) exposed 100–1000 ppm operating temperature 100–250 °C. responses showed that addition reduced sensor from 150 100 °C, while did not affect sensor. TiO2/MWCNT linear sensitivity concentrations increased temperatures optimal TiO2/MXene occurred TiO2/Gr 200 highest 100–500 generated sensor, 600–1000 250 produced values approximately 6.36, 33.61, 67.64, 102.23 159.07 100, 300, 500, 700 1000 hydrogen, respectively.