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2020-4-20 · To further study the morphology differences among GFe3 (a), GFe2 (b) and PGFe (c), SEM was used to produce in Fig. 2.As it can be seen from Fig. 2a, the surface of GFe3 was, in comparison, flatter and smoother. However, as displayed in Fig. 2b, there was an obvious change in the surface morphology of GFe2, many uniform FeS nanospheres were generated on the surface of GFe2, and …
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