Abstract
Porous three-dimensional (3D) hierarchical flower-like SnO2 nanomaterials were successfully synthesized via facile hydrothermal method combined with subsequent annealing process. Characterization analysis shows that the porous 3D SnO2 consists of a number of thin nanosheets with pores. Gas sensing properties indicate that the porous 3D SnO2 sensor has lower initial response temperature and optimal working temperature, better linearity in a certain range of gas concentration, better stability and selectivity to methane. Implies that porous 3D SnO2 nanomaterials will be promising candidates for methane sensors.
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