Template-free synthesis of nanoarrays SnO2 hollow microcubes with high gas-sensing performance to ether

Hierarchical nanoarrays SnO2 hollow microcubes were successfully synthesized by a simple one-pot template-free hydrothermal route without any substrates. The as-prepared products demonstrated novel hollow SnO2 microcubes with side length of 2-3 μm. Noticeably, the SnO2 cubic surfaces exhibited a hierarchical architecture of well-aligned nanorod arrays. The gas-sensing properties indicated that the nanoarrays SnO2 hollow microcubes possessed superior sensitivity towards ether at the heating voltage of 4.5 V. The formation and sensing mechanism of the nanoarrays SnO2 hollow microcubes were proposed in this paper.