Method for preparing organic hydrogenation catalyst based on noble metal nanoparticles
A nanoparticle and hydrogenation reaction technology, applied in the field of nanomaterials, can solve the problems of complex catalyst preparation methods and unoptimized catalytic activity, and achieve excellent catalytic activity
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[0038] Example 1:
[0039] 1) Preparation of ~100nm silica balls: Add 15mL of ethyl orthosilicate (TEOS) to a mixed solution consisting of 294mL of ethanol, 24mL of deionized water and 7.5mL of aqueous ammonia (28wt%), and stir at room temperature for 12 hours, Centrifuge the silicon ball and redisperse it into 50 mL isopropanol (HPLC grade), then add 0.1 mL 3-amino-4-hydroxybenzene sulfonic acid (APS), reflux at 70°C for 10 hours, then centrifuge and use the solid part The mixture of anhydrous ethanol and water is cleaned and re-dispersed in 150ml of anhydrous ethanol to obtain a base dispersion after amino modification.
[0040] 2) Preparation of ultra-small platinum nanoparticle film layer on the surface of the silicon ball. Take 3mL of the amino-modified base dispersion prepared in step 1) and add it to a mixture of 20mL of absolute ethanol, 125mL of deionized water and 0.2mL of aqueous ammonia (28wt%), and add 0.3g of dodecyl Sodium benzene sulfonate (SDBS), stir evenly to o...
Example Embodiment
[0042] Example 2:
[0043] 1) Preparation of ~100nm silica balls: Add 15mL of ethyl orthosilicate (TEOS) to a mixed solution consisting of 294mL of ethanol, 24mL of deionized water and 7.5mL of aqueous ammonia (28wt%), and stir at room temperature for 12 hours, Centrifuge the silicon ball and redisperse it into 50 mL isopropanol (HPLC grade), then add 0.1 mL 3-amino-4-hydroxybenzene sulfonic acid (APS), reflux at 70°C for 10 hours, then centrifuge and use the solid part The mixture of anhydrous ethanol and water is cleaned and re-dispersed in 150ml of anhydrous ethanol to obtain a base dispersion after amino modification.
[0044] 2) Preparation of ultra-small platinum nanoparticle film layer on the surface of the silicon ball. Take 3mL of the amino-modified base dispersion prepared in step 1) and add it to a mixture of 20mL of absolute ethanol, 125mL of deionized water and 0.2mL of aqueous ammonia (28wt%), and add 0.3g of dodecyl Sodium benzene sulfonate (SDBS), stir evenly to o...
Example Embodiment
[0046] Example 3:
[0047] 1) Preparation of ~100nm silica balls: Add 15mL of ethyl orthosilicate (TEOS) to a mixed solution consisting of 294mL of ethanol, 24mL of deionized water and 7.5mL of aqueous ammonia (28wt%), and stir at room temperature for 12 hours, Centrifuge the silicon ball and redisperse it into 50 mL isopropanol (HPLC grade), then add 0.1 mL 3-amino-4-hydroxybenzene sulfonic acid (APS), reflux at 70°C for 10 hours, then centrifuge and use the solid part The mixture of anhydrous ethanol and water is cleaned and re-dispersed in 150ml of anhydrous ethanol to obtain a base dispersion after amino modification.
[0048] 2) Preparation of ultra-small platinum nanoparticle film layer on the surface of the silicon ball. Take 3mL of the amino-modified base dispersion prepared in step 1) and add it to a mixture of 20mL of absolute ethanol, 125mL of deionized water and 0.2mL of aqueous ammonia (28wt%), and add 0.3g of dodecyl Sodium benzene sulfonate (SDBS), stir evenly to o...
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