High ethanol sensitive SnO2 microspheres

Comparing with the traditional method to make the tin oxide (SnO2) sensor material (hydrolysis of SnCl4 in basic solutions), a novel CVD strategy has been investigated to prepare highly sensitive SnO2 microspheres. SnCl2 was used as the precursor to form SnS2 microspheres, which was composed of single-crystal SnS2 sheet. Then, the sample was oxidized in air and transformed to polycrystalline SnO2 microspheres. BET surface area and BJH pore diameter were measured with nitrogen adsorption at 77.36 K on a Chemsorb-3000 instrument. X-ray diffraction (XRD) and transmission electron microscopy (TEM) results showed the sample had small grain size, which made it highly sensitive to ethanol.

Comparing with the traditional method to make tin oxide (SnO2) sensor material (hydrolysis of SnCl4 in basic solutions), a novel CVD strategy has been investigated to prepare high sensitive SnO2 microspheres. SnCl2 is used as the precursor to form SnS2 microsphere, which is composed of single-crystal SnS2 sheet. Then, the sample is oxidized in air and transformed to polycrystalline SnO2 microsphere. Figure optionsDownload as PowerPoint slide