14-P-26-Structure of Mo species incorporated into SBA-1 and SBA-3 studied by XAFS and UV-VIS spectroscopies

摘要: Publisher Summary This chapter presents the structure of molybdenum (Mo) species incorporated into SBA-1 and SBA-3 studied by X-ray absorption fine (XAFS) ultraviolet-visible (UV-VIS) spectroscopies. Direct incorporation Mo template-directed mesoporous silica is carried out through acidic route. High Mo-loading achieved without destructing regularity SBA-3. The local structural environment analyzed UV-vis extended (EXAFS) spectroscopies in comparison with that Mo-impregnated silicas. Edge energy spectra coordination number obtained from EXAFS shows agglomerates more easily than case impregnation while symmetry did not differ significantly among molybdosilicates.