Amorphous CoSnO3 for conductometric triethylamine gas sensing

Amorphous CoSnO 3 was synthesized by heating CoSn(OH) 6 at 300 ℃. Characterization results indicate that the metal-hydroxyl bond in CoSn(OH) 6 is converted into metal-oxygen bond in CoSnO 3 . The synthesized CoSnO 3 is completely amorphous and consisted of nanocubes with an average size of about 70 nm. Gas sensing results show that the amorphous CoSnO 3 exhibits an immense response of 202.2 to the triethylamine (TEA) vapor with a concentration of 100 ppm at the temperature of 100 ℃. The experimental results also confirmed the superior gas selectivity and long-term stability of the amorphous CoSnO 3 . The enhanced gas detection properties were attributed to the abundant oxygen vacancy defects, large specific surface area and advanced porosity induced by the amorphous structure of CoSnO 3 . The presented synthesis strategy could facilitate the advancement of metal oxide semiconductor (MOS) gas sensors hereafter.