A kind of ion exchange resin supported nano-gold palladium alloy catalyst and preparation method thereof
An ion-exchange resin, nano-gold technology, used in catalyst activation/preparation, chemical instruments and methods, organic compound/hydride/coordination complex catalysts, etc., can solve the problems of difficult recovery, loss of catalyst particles, etc. Effects of bonding, improved stability, strong environmental durability
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Embodiment 1
[0032] At 25°C, add 8mL of 0.5wt% aqueous solution of chloroauric acid into the reactor, add 8mL of 0.5wt% palladium chloride solution, and then add 0.20g of cetyltrimethylammonium bromide , stirred and reacted for 1 h, then added 4 mL of 10 wt % sodium borohydride aqueous solution, stirred and reacted at 30° C. for 8 h, and centrifuged to obtain a nano-gold-palladium alloy sol.
[0033] At 25°C, disperse 0.02g of nano-gold-palladium alloy sol in 50mL of deionized water, add 0.5g of aluminum sulfate to obtain an aqueous solution of aluminum ion-encapsulated nano-gold-palladium alloy; heat up to 60°C, and slowly add 10mL of carbonic acid with a mass fraction of 10wt%. Ammonium, stirred for 1 hour, left to age for 12 hours, cooled to 25°C; washed the filter cake with 30mL deionized water, dried at 100°C for 7 hours, then placed in a muffle furnace, and roasted at 600°C for 3 hours to obtain nano-gold-palladium alloy - Mesoporous alumina composite.
[0034] At 25°C, disperse 10g...
Embodiment 2
[0037] At 25°C, add 4mL of 0.5wt% potassium chloroaurate aqueous solution into the reaction kettle, add 20mL of 0.2wt% palladium acetate aqueous solution, then add 0.3g chitosan, stir for 1.5h, and then Add 2.4 mL of trisodium citrate aqueous solution with a mass fraction of 10 wt %, stir and react at 95° C. for 4 h, and centrifuge to obtain nano-gold-palladium alloy sol.
[0038]At 25°C, disperse 0.01g of nano-gold-palladium alloy sol in 20mL of deionized water, add 0.5g of aluminum nitrate to obtain an aqueous solution of aluminum ion-encapsulated nano-gold-palladium alloy; heat up to 50°C, and slowly add 20mL of chlorine with a mass fraction of 10wt%. Ammonium chloride, stirred for 3 hours, left to age for 18 hours, and cooled to 25°C; washed the filter cake with 40mL deionized water, dried at 80°C for 9 hours, then put it in a muffle furnace, and roasted at 550°C for 7 hours to obtain nano-gold palladium Alloy-Mesoporous Alumina Composite.
[0039] At 25°C, disperse 15g o...
Embodiment 3
[0042] At 25°C, add 10mL of chloroauric acid aqueous solution with a mass fraction of 0.4wt% into the reactor, add 5mL of a palladium acetate aqueous solution with a mass fraction of 0.1wt%, then add 0.30g of polyvinylpyrrolidone, stir for 2 hours, and then add 5.6 mL of sodium formate aqueous solution with a mass fraction of 10 wt%, stirred and reacted at 65° C. for 6 hours, and centrifuged to obtain a nano-gold-palladium alloy sol.
[0043] At 25°C, 0.02g of nano-gold-palladium alloy sol was dispersed in 40mL of deionized water, and 1.8g of aluminum sulfate was added to obtain an aluminum ion-encapsulated nano-gold-palladium alloy aqueous solution; the temperature was raised to 85°C, and 40mL of chlorine with a mass fraction of 15wt% was slowly added Ammonium chloride, stirred for 3 hours, left to age for 20 hours, cooled to 25°C; washed the filter cake with 90mL deionized water, dried at 85°C for 7.5h, then put into a muffle furnace, and roasted at 750°C for 2h to obtain gol...
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