Nitrogen-doped graphene-oxide-loaded ultrafine nano palladium catalyst and in-situ preparation method thereof

An ultra-fine nano, palladium catalyst technology, applied in metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the problems of loss, Pd nanoparticle agglomeration, etc.

Inactive Publication Date: 2019-07-30
INST OF PETROCHEM HEILONGJIANG ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Noble metal Pd nanocatalysts can efficiently catalyze the reduction reaction of 4-NP. At present, the preparation of Pd catalysts is mainly to realize the Pd 2+ reduction, but prone to agglomeration and loss of Pd nanoparticles

Method used

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  • Nitrogen-doped graphene-oxide-loaded ultrafine nano palladium catalyst and in-situ preparation method thereof
  • Nitrogen-doped graphene-oxide-loaded ultrafine nano palladium catalyst and in-situ preparation method thereof
  • Nitrogen-doped graphene-oxide-loaded ultrafine nano palladium catalyst and in-situ preparation method thereof

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Experimental program
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specific Embodiment approach 1

[0028] A kind of in-situ preparation method of nitrogen-doped graphene oxide supported ultrafine nanometer palladium catalyst, comprises the steps:

[0029] Step 1. Weigh a certain mass of carrier and palladium precursor solution according to the ratio of material to liquid, and mix them. After stirring at room temperature for a period of time, pour the mixed solution into a quartz tank, and after drying, the mixture is obtained for use;

[0030] Step 2. Place the mixture treated in step 1 in a plasma reactor, and in a closed state, pass in discharge gas, perform high-voltage plasma discharge at a certain gas pressure and power, and discharge for a certain period of time to obtain nitrogen-doped graphene oxide Loaded ultrafine nano palladium catalyst.

[0031] In the in-situ preparation method of a nitrogen-doped graphene oxide-supported ultrafine nano-palladium catalyst described in this embodiment, the solid-liquid ratio of the carrier and the palladium precursor solution is...

specific Embodiment approach 2

[0039] A nitrogen-doped graphene oxide-supported ultra-fine nano-palladium catalyst prepared according to the in-situ preparation method of a nitrogen-doped graphene oxide-supported ultra-fine nano-palladium catalyst described in Embodiment 1, and the Pd loading is 1 wt%. .

[0040] A nitrogen-doped graphene oxide-supported ultra-fine nano-palladium catalyst prepared by the in-situ preparation method of a nitrogen-doped graphene oxide-supported ultra-fine nano-palladium catalyst described in this embodiment, denoted as Pd 1 / GO-P 60 .

[0041] A nitrogen-doped graphene oxide-supported ultra-fine nano-palladium catalyst prepared by the in-situ preparation method of a nitrogen-doped graphene oxide-supported ultra-fine nano-palladium catalyst described in this embodiment, a transmission electron microscope photo with a magnification of 100,000 is as follows figure 1 As shown, the TEM photo of 40000 magnification is as follows image 3 As shown, it can be seen from the figure t...

specific Embodiment approach 3

[0054] A kind of in-situ preparation method of nitrogen-doped graphene oxide supported ultrafine nanometer palladium catalyst, comprises the steps:

[0055] Step 1. Weigh a certain mass of carrier and palladium precursor solution according to the ratio of material to liquid, and mix them. After stirring at room temperature for a period of time, pour the mixed solution into a quartz tank, and after drying, the mixture is obtained for use;

[0056] Step 2. Place the mixture treated in step 1 in a plasma reactor, and in a closed state, pass in discharge gas, perform high-voltage plasma discharge at a certain gas pressure and power, and discharge for a certain period of time to obtain nitrogen-doped graphene oxide Loaded ultrafine nano palladium catalyst.

[0057] In the in-situ preparation method of a nitrogen-doped graphene oxide-supported ultrafine nano-palladium catalyst described in this embodiment, the solid-liquid ratio of the carrier and the palladium precursor solution is...

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Abstract

The invention provides a nitrogen-doped graphene-oxide-loaded ultrafine nano palladium catalyst and an in-situ preparation method thereof, and belongs to the technical field of preparation of nano palladium catalysts. The catalyst mainly solves the problems of uneven size, larger particle size, easy agglomeration and low dispersion of palladium nanoparticles in a conventional preparation method. According to the method, a certain mass of a carrier and a palladium precursor solution are weighed according to a ratio of material to liquid, mixing is carried out, after stirring is performed for aperiod of time at the room temperature, a mixed solution is poured into a quartz tank, after drying is carried out, a mixture is obtained and placed into a plasma reactor, in a sealed state, a discharge gas is introduced, high-pressure plasma discharge is performed at a certain gas pressure and power, and the discharge is performed for a certain period of time to obtain the nitrogen-doped graphene-oxide-loaded ultrafine nano palladium catalyst. The catalyst prepared by the method exhibits higher catalytic activity in a reduction reaction of paranitrophenol, and has high catalytic performance for catalyzing the reduction reaction of the paranitrophenol.

Description

technical field [0001] The invention belongs to the technical field of nano-palladium catalyst preparation; in particular, it relates to a nitrogen-doped graphene oxide-loaded ultrafine nano-palladium catalyst and an in-situ preparation method thereof. Background technique [0002] Nitrophenol compounds are important raw materials in organic synthesis, but their pollution to water is becoming more and more serious. Among them, p-nitrophenol (4-nitrophenol, 4-NP) is highly toxic and soluble in water, but cannot be degraded in water. It is one of the most widely polluted and most difficult environmental organic pollutants. The reduction product of 4-NP, 4-aminophenol (4-aminopheno, 4-AP), has the advantages of low toxicity and easy degradation. Therefore, it is very important to prepare a catalyst that can efficiently catalyze the reduction reaction of 4-NP. [0003] Due to the special physical and chemical properties of noble metal nanoparticles, they have great application ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/44C07C213/02C07C215/76
CPCB01J23/44C07C213/02C07C215/76
Inventor 白雪峰刘腾刘洋吕宏飞
Owner INST OF PETROCHEM HEILONGJIANG ACADEMY OF SCI
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