Response of TiO<sub>2</sub>/MWCNT/B<sub>2</sub>O<sub>3</sub> gas sensor to hydrogen using different organic binder

Creative Commons License

Chachuli S. A. M., Hamidon M. N., Mamat M. S., ERTUĞRUL M., Abdullah N. H.

MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING, vol.99, pp.140-148, 2019 (SCI-Expanded) identifier identifier


A binder influences the sensitivity, resistivity and optimal operating temperature of a gas sensor, which plays an important role in gas sensing. This work compared the sensitivity of the TiO2/MWCNT/B2O3 gas sensor to hydrogen with the addition of different organic binders, namely linseed oil and ethyl cellulose, to TiO2/MWCNT/B2O3 paste. Both pastes were deposited on alumina substrate using the screen-printing method and annealed at 500 degrees C. The sensing films of gas sensor, OBL and OBE were characterized by field emission scanning electron microscopy (FESEM), Energy dispersive x-ray (EDX), X-ray diffraction (XRD) Raman Spectroscopy and Brunauer-Emmett-Teller (BET). The gas sensors were also exposed to different concentrations of hydrogen (100-1000 ppm) at various operating temperature (100 degrees C, 200 degrees C and 300 degrees C). The obtained results revealed that ethyl cellulose-based gas sensor achieves better sensitivity, whereas linseed oil-based gas sensor has better conductivity and recovery characteristic.