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The C/V-SiO2 samples were synthesized by the hydrothermal treatment of aqueous glucose and V-SiO2 that was pre-prepared by a sol–gel process. The samples were characterized by XRD, XPS, EPR, FT-IR, SEM, N2 adsorption–desorption. The results showed that in the hydrothermal process the V-SiO2 was covered by a rod-like carbonization material, and a small portion of V5+ species was reduced to V4+. The...
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