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- W2014210955 abstract "Stable V-MCM-41 mesoporous materials have been synthesized by hydrothermal method, using industrial Na 2 O·(3.3–3.5)SiO 2 as the source of much cheaper silica instead of conventional expensive organic precursors. The results of N 2 adsorption and X-ray diffraction showed that the synthesized samples had a high ordered hexagonal structure, good hydrothermal stability and thermal stability. The selective oxidation of styrene using hydrogen peroxide as oxidant over V-MCM-41 samples showed a good catalytic performance of partial oxidation, the phenylacetic acid was the principal product (the selectivity value was 49.4%). UV–vis spectra provided strong evidences that most of vanadium ions were incorporated into the framework of siliceous MCM-41 sample. Stable V-MCM-41 mesoporous materials have been synthesized by hydrothermal method, using hexadecyl-trimethyl-ammonium bromide as template, and industrial Na 2 O·(3.3–3.5)SiO 2 as the source of much cheaper silica instead of conventional expensive organic precursors. Several modern techniques like XRD, N 2 adsorption, FT-IR, UV–vis and SEM have been utilized to characterize the framework structure and texture of the samples. The results of N 2 adsorption and X-ray diffraction showed that the synthesized samples had a high ordered hexagonal structure, good hydrothermal stability and thermal stability. The selective oxidation of styrene using hydrogen peroxide as oxidant over V-MCM-41 samples showed a good catalytic performance of partial oxidation, the phenylacetic acid was the principal product (the selectivity value was 49.4%). Even after a thermal treatment at 900 °C in air for 12 h or a hydrothermal treatment in boiling water for 8 days, each of the two resultant materials could retain the ordered channels and a high BET surface area. UV–vis spectra provided strong evidences that most of vanadium ions were incorporated into the framework of siliceous MCM-41 sample." @default.
- W2014210955 created "2016-06-24" @default.
- W2014210955 creator A5011483202 @default.
- W2014210955 creator A5035222788 @default.
- W2014210955 creator A5058165733 @default.
- W2014210955 date "2006-08-01" @default.
- W2014210955 modified "2023-09-27" @default.
- W2014210955 title "Synthesis and characterization of mesoporous V-MCM-41 molecular sieves with good hydrothermal and thermal stability" @default.
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- W2014210955 doi "https://doi.org/10.1016/j.molcata.2006.03.078" @default.
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