Preparation method of nano-Pd hydrogenation catalyst loaded with three-dimensional reduction graphene oxide

A hydrogenation catalyst and graphene technology, applied in the direction of metal/metal oxide/metal hydroxide catalyst, physical/chemical process catalyst, chemical instrument and method, etc., can solve the problem of low recycling rate, sheet stacking, etc. problems, to achieve good catalytic activity and reusability

Active Publication Date: 2016-09-28
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • 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 / three-dimensional Method for reducing graphene oxide hydrogenation catalyst

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Weigh 0.04g of graphite oxide and add it to 80mL of deionized water, and then sonicate it at 180W at room temperature for 1.5h. After the sonication is over, add 0.5mL of 0.02mol / L PdCl to the solution 2 The solution and 80 mg of ascorbic acid were sonicated at 180 W for 5 min, heated in a water bath at 90°C for 1.5 h, centrifuged after the reaction, washed 5 times with deionized water, and vacuum-dried at 50°C for 2 h to obtain the catalyst A.

Embodiment 2

[0018] Weigh 0.04g of graphite oxide and add it into 40mL of deionized water, sonicate it at 180W at room temperature for 1.5h. After the sonication is over, add 0.5mL of 0.02mol / L PdCl to the solution 2 The solution and 60mg of ascorbic acid were ultrasonicated at 180W for 5min, heated in a water bath at 90°C for 1.5h, centrifuged after the reaction, washed 5 times with deionized water, and vacuum-dried at 50°C for 2h to obtain the catalyst B.

Embodiment 3

[0020] Weigh 0.04g of graphite oxide and add it into 20mL of deionized water, sonicate it at an ultrasonic frequency of 180W, and ultrasonicate at room temperature for 1.5h. After the ultrasonication is over, add 0.5mL of 0.02mol / L PdCl to the solution 2 The solution and 80 mg of ascorbic acid were sonicated at 180 W for 5 minutes, heated in a water bath at 90° C. for 1.5 hours, centrifuged after the reaction, washed 5 times with deionized water, and vacuum-dried at 50° C. for 2 hours to obtain the catalyst C.

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Abstract

The invention relates to a preparation method of a nano-Pd hydrogenation catalyst loaded with three-dimensional reduction graphene oxide. The preparation method comprises the steps that a certain amount of PdCl2 and ascorbic acid are added into an aqueous solution of graphene oxide by taking the graphene oxide as a carrier precursor, Pd is uniformly deposited on the generated three-dimensional reduction graphene oxide through a one-step hydrothermal method, and then high-dispersity loaded nano-Pd particles are prepared. By applying the catalyst to a hydrogenation reaction of olefin, the very high catalytic activity and stability are achieved, and the high recycling rate is achieved; the catalyst is mild in preparation condition, simple in process and low in cost, and industrialized production is easy to achieve.

Description

technical field [0001] The invention relates to the technical field of noble metal hydrogenation catalysts and their preparation, in particular to a method for preparing a three-dimensional reduced graphene oxide-supported nano-Pd hydrogenation catalyst. 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 st...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/44
CPCB01J23/44
Inventor 刘平陈炎亮李永昕薛冰
Owner CHANGZHOU UNIV
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