STRUCTURAL AND TEXTURAL PROPERTIES OF MCM-41 MESOPOROUS MOLECULAR SIEVES CONTAINING NB, V, MO -ALTERNATIVE CATALYSTS FOR HYDROCARBONS OXIDATION

摘要

Vanadium and molybdenum are difficult to incorporate into the MCM-41 skeleton. The presence of niobium tends to improve it. Well-ordered structures, typical for mesoporous solids with very uniform pore size distribution, were obtained for samples with high Si/T atomic ratio, whereas an additional porosity was registered for materials with high TME content.