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• W2019807508 abstract "A series of TiO2SiO2 catalysts were prepared by coprecipitation from the mixed solution of titanium tetrachloride and sodium silicate. Some of the sample were modified with 0.5 M H2SO4 and used as modified catalysts. The addition of TiO2 to SiO2 caused the increase of acidity and acid strength, and the shifts of OH and SiO stretching bands of silanol group to lower frequencies in proportion to the TiO2 content. Catalytic activities for 2-propanol dehydration and cumene dealkylation increased in relation to the increase of acidity and the band shifts to lower frequencies. The catalytic activities of modified catalysts were higher than those of unmodified catalysts, and the effect of modification on catalytic activity was higher for 2-propanol dehydration than for cumene dealkylation. The effect of modification on catalytic activity increased with increasing TiO2 content of the catalysts. Actually, 92-TiO2SiO2/SO2−4 had the highest increment in catalytic activity and 10-TiO2SiO2/SO2−4 had the lowest increment for the 2-propanol dehydration." @default.
• W2019807508 created "2016-06-24" @default.
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• W2019807508 date "1994-10-01" @default.
• W2019807508 modified "2023-10-16" @default.
• W2019807508 title "Physicochemical properties of TiO2SiO2 unmodified and modified with H2SO4 and activity for acid catalysis" @default.
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• W2019807508 doi "https://doi.org/10.1016/0304-5102(94)00117-0" @default.
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