A kind of ion exchange resin loaded nano-gold catalyst and preparation method thereof
An ion exchange resin, exchange resin technology, applied in chemical instruments and methods, physical/chemical process catalysts, organic compound/hydride/coordination complex catalysts, etc., can solve the problems of difficult recovery, easy loss of catalyst particles, etc. Achieve the effect of strong environmental durability, strong ion exchange properties, and high catalytic activity
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Embodiment 1
[0033] At 25°C, 8 mL of aqueous solution of chloroauric acid with a mass fraction of 0.5 wt % was added to the reaction kettle, 16 mL of an aqueous solution of tetrapropylammonium hydroxide with a concentration of 0.005 g / mL was added, stirred for 2 h, and 200 mL of aqueous solution with a mass fraction of 0.1 wt % was added. The aqueous solution of trisodium citrate was stirred and reacted at 100 °C for 5 h, and centrifuged to obtain nano-gold sol;
[0034] At 25°C, measure 50 mL of ethanol and 8 mL of deionized water, add them to 0.3 g of nano-gold sol, and ultrasonically disperse for 1 h to obtain a mixture of nano-gold sol ethanol and water, adjust the pH of the mixture to 9 with 0.1 g / mL ammonia solution, add 1.2g of tetraethyl orthosilicate, stirred for 1.5h, added 0.9g of n-tetrabutyl titanate, stirred for 0.5h, heated to 80°C and continued to react for 60h, cooled to room temperature, filtered, and deionized with 15mL of ethanol and 80mL in turn The filter cake was was...
Embodiment 2
[0038] At 25°C, add 15mL of chloroauric acid aqueous solution with a mass fraction of 0.08wt% into the reaction kettle, add 5mL of an aqueous solution of tetrapropylammonium bromide with a concentration of 0.01g / mL, stir for 4h, and add 30mL of a 0.2wt% aqueous solution with a mass fraction of trisodium citrate aqueous solution, stirred and reacted at 80°C for 4h, and centrifuged to obtain nano-gold sol;
[0039] At 25°C, measure 70mL of ethanol and 5mL of deionized water, add 0.2g of nano-gold sol, and ultrasonically disperse for 2 hours to obtain a mixture of ethanol and water of nano-gold sol, adjust the pH of the mixture to 12 with 0.4g / mL of sodium hydroxide aqueous solution, Add 0.8g tetraethyl orthosilicate, stir for 2h, add 0.5g titanium tetrachloride, stir for 1h, heat up to 100°C and continue to react for 36h, cool down to room temperature, filter, wash with 15mL ethanol and 50mL deionized water in turn The filter cake was vacuum-dried at 85°C for 8 hours, placed in ...
Embodiment 3
[0043] At 25°C, add 6mL of 0.15wt% gold acetate aqueous solution into the reaction kettle, add 9mL of 0.008g / mL tetrapropylammonium bromide aqueous solution, stir for 2h, add 15mL of 0.3wt% gold acetate solution Sodium borohydride aqueous solution, stirred and reacted at 50°C for 2 hours, and centrifuged to obtain nano-gold sol;
[0044] At 25°C, measure 110mL of ethanol and 15mL of deionized water, add 0.4g of nano-gold sol, and ultrasonically disperse for 1 hour to obtain a mixture of ethanol and water of nano-gold sol. Use 0.2g / mL of sodium hydroxide aqueous solution to adjust the pH of the mixture to 10. Add 0.6g of hexamethyldisiloxane, stir for 4h, add 0.8g of n-tetrabutyl titanate, stir for 4h, raise the temperature to 120°C and continue the reaction for 12h, cool down to room temperature and filter, then use 18mL of ethanol and 60mL of deionized Wash the filter cake with water, dry it in vacuum at 90°C for 9 hours, place it in a muffle furnace, and bake it at 600°C for...
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