Abstract
SnO2/graphene composites with different contents of graphene were prepared by a solvothermal process using SnCl4·5H2O as Sn precursors, alcohol as solvents and graphene oxide as supports. The composites were characterized by X-ray diffraction, transmission electron microscopy, UV–Vis absorption spectroscopy and Fourier transform infrared spectroscopy, and analyzed by the transient photocurrent response and electrochemical impedance spectra. The content of graphene plays a crucial role in promoting the photoelectric properties of SnO2/graphene due to the effective electron capture and transfer ability upon the insertion of graphene. A higher photocurrent density and lower charge-transfer resistance can be observed for 2% SnO2/graphene. The results indicate that a more efficient separation of photo-induced electron–hole pairs and a faster electron transfer take place at 2% SnO2/graphene.
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The work was supported by National Natural Science Foundation of China No. 51204129.
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Lei, Y., Bing, X., Zhang, Z. et al. Solvothermal synthesis of SnO2/graphene composites with improved photoelectric characteristics. J Mater Sci: Mater Electron 28, 17058–17062 (2017). https://doi.org/10.1007/s10854-017-7631-x
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DOI: https://doi.org/10.1007/s10854-017-7631-x