Graphene loaded cerium catalyst and preparation method thereof
A graphene and catalyst technology, applied in the field of graphene-supported cerium catalyst and its preparation, can solve the problems of poor recycling effect, reduced catalytic efficiency, and loss, and achieve easy recovery and recycling, simple method operation, and high catalytic activity Effect
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[0015] An embodiment of the present invention provides a method for preparing a graphene-supported cerium catalyst, which includes the following steps:
[0016] S1. The aqueous solution of cerium trichloride is added dropwise to the alcohol solution containing concentrated ammonia, stirred, and kept at a temperature of 40-60° C. for 1 to 1.5 hours to obtain a cerium oxide suspension.
[0017] Specifically, the reaction principle is roughly that the cerium trichloride aqueous solution and the alcohol solution containing concentrated ammonia water react to form cerium hydroxide. The cerium hydroxide is unstable and decomposes into cerium oxide to form a cerium oxide suspension. The cerium trichloride aqueous solution adopts the dripping method to fully react the cerium trichloride aqueous solution with the alcohol solution of concentrated ammonia water, which improves the conversion rate of the reaction. The purpose of the same stirring is to make the cerium trichloride aqueous soluti...
Example Embodiment
[0031] Example 1
[0032] This embodiment provides a method for preparing a graphene-supported cerium catalyst, which includes the following steps:
[0033] First, weigh 0.20 g of anhydrous cerium trichloride and dissolve in 100 ml of deionized water, and obtain a cerium trichloride solution after being fully dissolved. Add 50ml of concentrated ammonia-ethanol solution (1:1) dropwise to the above cerium trichloride solution, stir magnetically, and keep at 50°C for 1 hour to obtain a cerium oxide suspension.
[0034] Secondly, 1.20 g of graphene oxide was weighed, added to 50 ml of distilled water, and placed in an ultrasonic reactor with a power of 168W for 2 hours to obtain a graphene oxide suspension.
[0035] Finally, after mixing the above-mentioned cerium oxide suspension and graphene oxide suspension, they were transferred to a polytetrafluoroethylene-lined autoclave and reacted at 160°C for 8 hours to obtain a mixed solution. The obtained mixed solution was centrifuged and remo...
Example Embodiment
[0037] Example 2
[0038] This embodiment provides a method for preparing a graphene-supported cerium catalyst, which includes the following steps:
[0039] First, weigh 0.22 g of anhydrous cerium trichloride and dissolve in 100 ml of deionized water, and obtain a cerium trichloride solution after being fully dissolved. Add 50ml of concentrated ammonia-ethanol solution (1:1) dropwise to the above cerium trichloride solution, stir magnetically, and keep at 50°C for 1 hour to obtain a cerium oxide suspension.
[0040] Secondly, 1.18g of graphene oxide was weighed, added to 50ml of distilled water, and placed in an ultrasonic reactor with a power of 168W for 1.5h to obtain a graphene oxide suspension.
[0041] Finally, after mixing the above-mentioned cerium oxide suspension and graphene oxide suspension, they were transferred to a polytetrafluoroethylene-lined autoclave and reacted at 168°C for 9 hours to obtain a mixed solution. The obtained mixed solution was centrifuged and removed. ...
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