Preparation of SnO2 nanoflower with porous nanosheet via a one-step hydrothermal method

A unique nanoflower assembled from porous nanosheets was synthesized successfully via a novel one-step hydrothermal method for the first time. Namely, there was no calcination conducted on the whole preparation process, which was different from what the previous researches did. The unique architecture was characterized in detail using X-ray diffractometer, field-emission electron microscope. A possible growth mechanism was further proposed. We find that the obtained material shows a very excellent gas-sensing performance due to unique architecture with lots of pores on the petals. [Display omitted] •A unique nanoflower assembled from porous nanosheets was syntheized successfully via a one-step hydrothermal method without calcination.•The unique nanostructure show an great enhanced gas-sensing performance.•A possible growth mechanism for the unique nanostructure is proposed.