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A kind of preparation method of graphene oxide supported nano PD hydrogenation catalyst

A hydrogenation catalyst and graphene technology, applied in the direction of metal/metal oxide/metal hydroxide catalyst, physical/chemical process catalyst, catalyst carrier, etc., can solve the problem of low loading rate, easy agglomeration of Pd nanoparticles, preparation process High-efficiency catalysis, environmental friendliness, and simple operation

Active Publication Date: 2016-03-09
CHANGZHOU XIAOGUO INFORMATION SERVICES
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved in the present invention is to provide a relatively simple, clean, and low-cost method for preparing highly dispersed Pd nanoparticles / graphene oxide for the problems of easy aggregation of Pd nanoparticles, large pollution in the preparation process, and low loading rate. Hydrogenation Catalyst Method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Weigh 0.02g of graphite oxide and add it into 20mL of deionized water, and sonicate it at 180W at 50°C for 1.5h. After the sonication is over, add 1mL of 0.02mol / L PdCl to the solution 2 The solution was sonicated at 180W, 20°C for 20min, centrifuged after the reaction, washed 5 times with deionized water, and vacuum-dried at 60°C for 2h to obtain the catalyst A.

Embodiment 2

[0017] Weigh 0.1g of graphite oxide and add it to 20mL of ethanol, sonicate it at 180W, 50°C for 1.5h, after the sonication, add 0.5mL of 0.02mol / L PdCl to the solution 2 The solution was sonicated at 120W at 10°C for 10 minutes, centrifuged after the reaction, washed 5 times with deionized water, and vacuum-dried at 60°C for 2 hours to obtain the catalyst B.

Embodiment 3

[0019] Weigh 0.02g of graphite oxide and add it to 20ml of ethylene glycol, sonicate it at 180W, 50°C for 1.5h, after the sonication, add 1mL of 0.02mol / L PdCl to the solution 2 The solution was sonicated at 180W and 20°C for 20min, centrifuged after the reaction, washed 5 times with deionized water, and vacuum-dried at 60°C for 2h to obtain the catalyst C.

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Abstract

The invention relates to a preparation method of a graphene oxide-loaded nano Pd (palladium) hydrogenation catalyst. The preparation method is characterized by comprising the following steps: ultrasonically stripping graphite oxide which is adopted as a carrier in a solvent to obtain graphene oxide, adding a certain amount of PdCl2 solution into the graphene oxide, and promoting the interaction between the graphene oxide and Pd ions by utilizing ultrasonic without adding any reducing agent so that Pd ions are uniformly deposited onto the graphene oxide to obtain the loaded Pd nano particle catalyst with high dispersion property. The prepared catalyst is not only simple in preparation method and environment-friendly in preparation process, but also high in stability and reusability. The catalyst has very high catalytic activity when applied to the hydrogenation of olefin, nitrobenzene and cinnamyl aldehyde.

Description

technical field [0001] The invention relates to the technical field of hydrogenation catalysts and their preparation, in particular to a method for preparing graphene oxide-supported nano-Pd hydrogenation catalysts. Background technique [0002] Hydrogenation reaction is one of the important reactions in industrial catalysis. The catalysts currently used for this reaction are mainly noble metals such as Pd and Pt. Nano-metal catalysts, especially nano-Pd, occupy an important position in the field of heterogeneous catalysis because of their excellent catalytic activity and selectivity. Nano-Pd is easy to agglomerate, difficult to exist stably, and difficult to recycle, which are the current problems and research hotspots. It is a more effective way to disperse nano-Pd through the carrier, and use the force between the carrier and Pd to prevent the agglomeration of nanoparticles and increase the recovery rate. The carriers currently studied mainly include: Al 2 o 3 , SiO ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/44B01J32/00C07C13/18C07C5/03
Inventor 刘平武梦瑶李永昕薛冰
Owner CHANGZHOU XIAOGUO INFORMATION SERVICES
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