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(a) TEM images of rGO; (b,c) TEM images of SnO2/rGO under different magnification; (d) HRTEM images of SnO2/rGO, and the inset is the corresponding SAED pattern; and (e) elemental mapping of SnO2/rGO depicting the even distribution of C (e1), O (e2), and Sn (e3).
