Enhanced acetone sensing performance of nanostructured Sm2O3 doped SnO2 thick films

(a) TG-DTA plot of air dried precipitate of (S3) 6 mol.% Sm2O3 doped SnO2; (b) XRD patterns of S0, S1, S2, S3 and S4 samples sintered at 700 °C for 2 h; (c) Influence of Sm doping on the optical band gap (Eg) derived from UV absorption edge of S0, S1, S2, S3 and S4 samples; (d) Variation in response of S0, S1, S2, S3 and S4 thick film sensors towards 2000 ppm of acetone vapor at different operating temperatures