Journal
CRYSTENGCOMM
Volume 13, Issue 11, Pages 3718-3724Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c1ce05073g
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Funding
- National Nature Science Foundation of China [60625301, 61006055, 61074172]
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Porous SnO2 hierarchical architectures were synthesized by calcining the precipitates prepared through a facile one-step hydrothermal synthesis method. Field emission scanning electron microscopic and transmission electron microscopic results revealed that these hierarchical nanostructures were built from two-dimensional porous nanosheets. The morphology of the prepared products could be tailored by changing the precursor concentration and reaction time. On the basis of experimental results, a possible mechanism for the formation of the three-dimensional SnO2 hierarchical nanostructure was speculated. Moreover, gas sensing tests showed that the sensor using porous SnO2 hierarchical nanosheets after annealing at 600 degrees C for 2 h exhibited better gas sensing properties compared with the sensor based on conventionally prepared SnO2 nanoparticles. The enhancement in gas sensing properties was attributed to their unique structures.
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