Abstract
In this study, a BaTiO
3
/Ag/WO
3
nanocomposite was chemically synthesized for its gas sensing properties towards LPG. The formation of the novel BaTiO
3
/Ag/WO
3
nanocomposite was confirmed by XRD, TEM and FTIR analyses using the peak positions, observed planes, and existing vibrational bands, respectively with, Ag NPs of ~ 24 nm. The direct band gap 3.1 eV and absorption edge (411 nm) of the BaTiO
3
/Ag/WO
3
nanocomposite were determined using UV–Vis spectroscopy. The vibrational bands at 471, 504, 804, and 1636 cm
−1
are attributed to the interaction of silver with O–W–O and W–O–W in WO
3
, Ti–O in BTO, and C–O, respectively in the BTO/Ag/WO
3
nanocomposite. The higher dielectric constant and activation energy were estimated to be 2342 and 9.7 meV respectively. The sensitivity towards LPG at high temperature was ~ 99% with ~ 88 µA
I
a.c.
, while a.c. conductivity was very small at high temperatures. Long-time stability (30 days) with lower response time (10-4 s) and recovery time (17–21 s) were achieved. The limit of detection for LPG was found 205 ppm.
Graphical abstract