Materials with hierarchical architectures often exhibit novel functional properties. In this paper, the
hierarchical SnO2flower-like architecture, consisting of numerous aggregative nanosheets was successfully synthesized via a facile hydrothermal method and subsequent calcination. The structures and
morphologies of this hierarchical architecture were characterized in detail by means of powder X-ray
diffraction (XRD) and field-emission scanning electron microscopy (FE-SEM). Further comparative
experiments show that the sodium citrate was benefit to promote the growth of SnO2nanosheets and
accelerate the assembling of nanosheets intoflower-like architecture, the PEG provided nucleation sites
and made the nanoflowers grow uniformly and separated. Moreover, a possible growth mechanism of
theflower-like architectures was proposed. The non-trivial behavior offlower-like SnO2may be driven
by the properties of grain boundaries
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