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• W1139307695 abstract "A simple and effective approach is demonstrated to improve the hydrothermal stability of mesoporous SBA-15 zeolite via a post-synthesis treatment of organic solvents, such as cyclohexane, toluene and n-butanol, at 157 or 190 °C for 6–24 h. After hydrothermal treatment at 800 °C for 12 h in 100% steam, the treated SBA-15 retained a well-ordered mesostructure, and retained high surface areas of 192–281 m2/g. SBA-15 zeolite treated by cyclohexane at 190 °C for 24 h showed the highest hydrothermal stability. The stabilization mechanism suggests that the solvothermal treatment has a significant promoting effect on dehydrating Si–OH groups in silica walls to form stable Si(OSi)4 from Si(OSi)2(OH)2 or Si(OSi)3OH groups. As a result, the wall defects after solvothermal treatment decrease, and the stability of silica is improved remarkably. This promoting effect strongly depends on the solvent properties, treatment temperature, and precursors of SBA-15 zeolite. The treatment by a nonpolar and low boiling point organic solvent displays the highest promoting effect on the calcined SBA-15 zeolite. This approach is simple, has low energy consumption and has potential application in the laboratory and for industry to prepare hydrothermally stable well-ordered mesoporous SBA-15 zeolite." @default.
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• W1139307695 date "2015-08-01" @default.
• W1139307695 modified "2023-10-14" @default.
• W1139307695 title "Facile solvothermal post-treatment to improve hydrothermal stability of mesoporous SBA-15 zeolite" @default.
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• W1139307695 doi "https://doi.org/10.1016/s1872-2067(15)60857-9" @default.
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