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Vanadium substituted mesoporous molecular sieves (V-MCM-41) were prepared following a synthesis procedure developed in our laboratory [J. Phys. Chem. B 106 (2002) 8437]. N 2 adsorption and X-ray diffraction experimental results show that our samples have a highly ordered hexagonal structure and fairly good stability. X-ray absorption and UV-vis spectra provide strong evidence that most vanadium...
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