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Field-emission scanning electron microscopy (FESEM) images of pure g-C3N4 (a); SnO2 flower-like nanorods (b); SnO2/g-C3N4nanocomposite (c); and transmission electron microscopy (TEM) images of the SnO2/g-C3N4 composite (d,e) and pure g-C3N4 (f).
