Preparation and Characterization of SnO_2 Nanospheres with Fine Structure

SnO2 nanospheres with fine structure were prepared with SnCl4·5H2O as raw materials by a solvothermal process. The X-ray diffraction pattern and selected area electron diffraction show that the as-prepared SnO2 crystallites are well crystallized. Transmission electron microscope micrographs show that the prepared product contains nanospheres with sizes of 50-80nm. Magnified TEM image further reveals that the nanospheres display fine structure consisting of 2-6nm ultrafine particles. This structure tends to have high specific surface area and favorable for the application in gas-sensitive detection.