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Conversion of α-Fe2O3 from nanorods to nanotubes has been demonstrated by means of controlling the additive, hydrothermal time, and temperature. The results indicate that Na2SO4 in precursor solution facilitates the formation of α-Fe2O3 phase, and increasing the hydrothermal time and temperature is favorable for the conversion of α-Fe2O3 from spindle nanorods to nanotubes by dissolving the sharp ends...
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