Influence of hydrothermal temperature on structures and photovoltaic properties of SnO2 nanoparticles
作者： Yang Liu , Jihua Yang , Wensheng Yang , Tengfeng Xie , Yubai Bai
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摘要: Two SnO2 nanoparticles were synthesized by hydrothermal method at 170 °C and 180 °C, respectively. Transmission electron microscope observations reveal that the diameters of both are around 6 nm. At same time, surface photovoltage spectroscopy measurements show nanoparticle has more electronic states 0.3 eV below conduction band than one °C. This means temperatures chosen in synthesis have significant influence on characteristics resultant but effect their sizes is not obvious. However, after being calcined 500 for 2 h, diameter increased to 23 nm 32 as calculated from X-ray diffraction pattern.
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