A facile method for preparation of uniformly decorated-spherical SnO2 by CuO nanoparticles for highly responsive toluene detection at high temperature

Angga Hermawan, Yusuke Asakura, Miki Inada, Shu Yin

Table 1 Comparison of SnO2-based toluene gas sensing performance.

Material T (oC) Conc. (ppm) Response (Ra/Rg or Rg/Ra) Selectivity Rtoluene/Rothergas Response/ recovery times (s) Refs. SnO2-decorated NiO nanostructure 250 100 60 2 N/A [10] NiO -SnO2 composite nanofiber 330 50 11 3.8 11.2 /4 s [42] SnO2-Fe2O3 Interconnected Nanotubes 260 50 25.3 7 6/10 [43] Pd-loaded flower-like SnO2 microspheres 250 10 17.4 1.7 N/A [20] Pd- loaded SnO2 cubic nanocages 230 20 41.4 4.1 0.4/16.5 [18] SnO2-ZnO core-shell nanowires 300 1 73 2.8 N/A [44] CuO-decorated spherical SnO2 400 75 540 5 100/36 This work