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Fig. 1a shows the TEM image of 5 wt% V2O5/CNT catalyst. It is clear that there are no vanadium species on the surface of CNTs. However, EDS for the 5 wt% V2O5/CNTs catalyst exhibits the presence of vanadium species (Fig. 1b), indicating that the vanadium species should be molecularly modified on the surface of
CNTs.
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