Yolk-eggshell-structured zeolite molecular sieve-mesoporous titanium oxide composite material and preparation method thereof
A technology of zeolite molecular sieve and mesoporous titanium oxide, which can be used in molecular sieve catalysts, chemical instruments and methods, silicon compounds, etc., and can solve problems such as limitations
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Embodiment 1
[0043] (I) Add 0.5 g ZSM-5 zeolite (Si / Al=100) into 280 mL deionized water, add 0.3 mL ammonia water, then add 0.4 g resorcinol and 0.6 mL formaldehyde, stir at 30 ℃ for 24 h , and then stirred at 80 °C for 5 h, the reaction solution turned into brick red, centrifuged, and the obtained solid product was washed three times with ethanol and deionized water respectively to obtain ZSM-5PF with a core-shell structure;
[0044] (II) Disperse the ZSM-5PF obtained in step (I) into 600 mL of ethanol, sonicate for 1 h, then add 1.8 mL of concentrated ammonia water, and then slowly add 12 mL of tetrabutyl titanate with a syringe (the dropwise addition is completed in 1 hour) ), stirred at 25 °C for 24 h, the color of the reaction solution changed from brick red to lighter, and centrifuged, the obtained solid product was washed with ethanol and deionized water three times, dried at 80 °C for 12 h, and finally calcined at 500 °C in air atmosphere for 2 h. h, ZSM-5TiO with high specific sur...
Embodiment 2
[0047] (I) Add 0.5 g ZSM-5 zeolite (Si / Al = 40) to 280 mL deionized water, add 0.3 mL ammonia water, then add 0.4 g phenol and 0.6 mL formaldehyde, stir at 30 °C for 24 h, and then Stirring at 80 °C for 24 h, the reaction solution turned yellow, centrifuged, and the obtained solid product was washed three times with ethanol and deionized water respectively to obtain ZSM-5PF with a core-shell structure;
[0048] (II) Disperse the ZSM-5PF obtained in step (I) into 600 mL of ethanol, sonicate for 1 h, then add 1.8 mL of concentrated ammonia water, and then slowly add 6 mL of tetrabutyl titanate (0.5 hours) ), stirred at 25 °C for 24 h, the color of the reaction solution changed from yellow to light, centrifuged, the obtained solid product was washed three times with ethanol and deionized water, dried at 80 °C for 12 h, and finally calcined at 450 °C for 3 h in air atmosphere , to obtain ZSM-5TiO with a high specific surface area egg yolk-eggshell structure 2 Composite material, ...
Embodiment 3
[0051] (I) Add 0.5 g ZSM-5 zeolite (Si / Al = 200) into 280 mL deionized water, add 0.3 mL ammonia water, then add 0.4 g resorcinol and 0.6 mL formaldehyde, stir at 30 ℃ for 24 h , and then stirred at 80 °C for 24 h, the reaction solution turned into brick red, centrifuged, and the obtained solid product was washed three times with ethanol and deionized water respectively to obtain ZSM-5PF with a core-shell structure;
[0052] (II) Disperse the ZSM-5PF obtained in step (I) into 600 mL of ethanol, sonicate for 1 h, then add 1.8 mL of concentrated ammonia water, and then slowly add 18 mL of tetrabutyl titanate (1.5 hours) ), stirred at 25 °C for 24 h, the color of the reaction solution changed from brick red to light, and centrifuged, the obtained solid product was washed three times with ethanol and deionized water, dried at 80 °C for 12 h, and finally calcined at 450 °C in air atmosphere for 3 h, ZSM-5TiO with high specific surface area egg yolk-eggshell structure 2 Composite m...
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