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- W2316931856 abstract "The aging characteristics and stability of decade (12 years) old mesoporous silica MCM-41 samples of varying pore size and wall thickness has been tracked and compared with freshly synthesized samples. It was found that calcined forms of hydrothermally synthesized MCM-41 samples are, depending on their initial wall thickness, generally stable to storage under ambient conditions over the 12 year period. The calcined samples retain all (i.e., 96–100%) of their surface area and virtually all (87–96%) their pore volume. Rather surprisingly, calcined MCM-41 with wall thickness of ca. 11 A exhibit greater apparent aging stability with respect to retention of unit-cell parameter compared to thicker walled (22 A) analogues. After 12 years of storage, both types of samples exhibit pore wall thickness of 11–12 A representing much greater unit cell contraction for the 22 A sample. Despite varying levels of initial silica condensation and silanol concentration, both types of aged calcined samples exhibit similar 29Si..." @default.
- W2316931856 created "2016-06-24" @default.
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- W2316931856 date "2012-10-31" @default.
- W2316931856 modified "2023-09-25" @default.
- W2316931856 title "On the Shelf Life and Aging Stability of Mesoporous Silica: Insights on Thermodynamically Stable MCM-41 Structure from Assessment of 12-Year-Old Samples" @default.
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- W2316931856 doi "https://doi.org/10.1021/cm302887h" @default.
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