Synthesis of multifarious hierarchical flower-like SnO2 and their gas-sensing properties

• The flower-sheet SnO2 sensor displayed particular response to the target gas.
• Property improvement is independent of operating temperature and gas concentration.
• Enhanced key gas sensing property meets basic needs for practical applications.
• Sensing properties of nanocrystals can be improved by tailoring their shape and structure.

We successfully synthesized variant hierarchical assembled flower-like SnO2 via a simple hydrothermal technique and subsequent calcination. The structures and morphologies of the 3D nanostructures were investigated by means of powder X-ray diffraction (XRD) and field-emission scanning electron microscopy (FE-SEM). The formation mechanism of these materials were proposed in detail. The gas-sensing performances of the as-prepared SnO2 were investigated towards ethanol. It is noted that the flower-sheet SnO2 sensor displayed particular response to the target gas, rendering SnO2 as a potential gas-sensing material for a broad range of future sensor applications.

The flower-sheet SnO2 sensor displayed particular response to the target gas, rendering SnO2 as a potential gas-sensing material for a broad range of future sensor applications.Figure optionsDownload as PowerPoint slide