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Method for preparing graphene oxide loaded palladium through atmospheric pressure cold plasma in liquid phase

A cold plasma and cold plasma technology is applied in the field of preparation of graphene oxide-supported palladium in solution, which can solve the problems of reduced catalytic performance, high temperature, unfavorable catalytic performance, etc., and achieves simplifying preparation steps, saving preparation resources, and improving catalytic performance. Effect

Active Publication Date: 2021-11-16
DALIAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the chemical reduction method needs to use an excessive amount of toxic chemical reagents; the hydrogen thermal reduction method requires high temperature, high energy consumption, and it is easy to cause the aggregation of Pd nanoparticles, thereby reducing the catalytic performance.
It should be emphasized that these methods will reduce the graphene oxide (GO) support to reduced graphene oxide (rGO) in the process of reducing palladium ions, which is not conducive to the improvement of catalytic performance.

Method used

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  • Method for preparing graphene oxide loaded palladium through atmospheric pressure cold plasma in liquid phase
  • Method for preparing graphene oxide loaded palladium through atmospheric pressure cold plasma in liquid phase
  • Method for preparing graphene oxide loaded palladium through atmospheric pressure cold plasma in liquid phase

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Effect test

Embodiment 1

[0028] Preparation of Pd / GO catalytic materials by argon-hydrogen plasma in liquid phase:

[0029] The Pd / GO catalytic material was prepared by argon-hydrogen plasma in the liquid phase. The specific steps were as follows: firstly prepare 1.28g L -1 Pd(NO 3 ) 2 Solution; Weigh 0.1g of GO powder into a glass bottle, then use a pipette to transfer 4ml of prepared Pd(NO 3 ) 2 Put the solution into a glass bottle and shake well for later use. The prepared mixed liquid was poured into a quartz reactor (diameter 3 cm, depth 4 mm). Adjust the height of the quartz reactor so that the liquid surface is 2mm away from the electrode, seal the device and connect the circuit, adjust the discharge frequency to 10.3kHz and the discharge voltage to 6.0kV with an oscilloscope. Access to H 2 / Ar mixed gas (V H2 :V Ar =1:1)10min, the gas flow rate is 100ml·min -1 . The discharge time is 9min, and the magnetic stirrer is set to 500r·min -1 . After the discharge is over, turn off the po...

Embodiment 2

[0031] Preparation of Pd / GO-Ar-L catalytic material by argon plasma in liquid phase:

[0032] Preparation of Pd / GO-Ar-L by argon plasma in the liquid phase, the specific steps are similar to those in Example 1, only the discharge atmosphere is changed to pure argon, and the gas flow rate is 100ml min -1 , and record the prepared sample as Pd / GO-Ar-L. The mass fraction of Pd is 2.0wt%.

Embodiment 3

[0034] Preparation of Pd / GO-H by Argon-Hydrogen Plasma in Gas Phase 2 / Ar-G catalytic material:

[0035] Preparation of Pd / GO-H by Argon-Hydrogen Plasma in Gas Phase 2 / Ar-G catalytic material, the specific steps are: weigh 0.1g of GO powder into a sample bottle, and then use a pipette gun to transfer an appropriate amount of H2 PdCl 4 The solution was soaked overnight in a glass bottle container. The impregnated samples were dried in an oven at 120°C for 2 hours before use. Put the dried sample into a plate-plate dielectric barrier discharge device, and pass H 2 / Ar mixed gas (V H2 :V Ar =1:1)10min, the gas flow rate is 100ml·min -1 , the discharge frequency is 11.8kHz, and the discharge voltage is 11.0kV. The discharge time is 6min, and the processed sample is recorded as Pd / GO-H 2 / Ar-G. The mass fraction of Pd is 2.0wt%.

[0036] XRD graph analysis:

[0037] like figure 1 It can be seen that the GO sample has a sharp diffraction peak at 2θ=11°, which is the cha...

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Abstract

The invention belongs to the technical field of nano material preparation, and discloses a method for preparing graphene oxide loaded palladium through atmospheric pressure cold plasma in a liquid phase. The method comprises the following steps of: preparing a mixed liquid containing graphene oxide powder and a palladium precursor with a certain concentration; treating the mixed liquid containing graphene oxide powder and a palladium precursor in an atmospheric pressure cold plasma quartz reactor; and centrifuging, washing and drying the mixed liquid subjected to atmospheric pressure cold plasma treatment to obtain a graphene oxide loaded palladium catalytic material. The atmospheric pressure cold plasma only reduces palladium but does not reduce graphene oxide in a liquid phase, so that the preparation steps are simplified, the catalytic performance is improved, and the preparation resources are saved.

Description

technical field [0001] The invention belongs to the technical field of nanomaterial preparation, in particular to a method for preparing graphene oxide-supported palladium (Pd / GO) in a solution. Background technique [0002] p-Nitrophenol (4-NP) is a common refractory substance in industrial wastewater and has been listed as one of the environmental priority pollutants in the world. The reduction of 4-NP to p-aminophenol (4-AP) can not only effectively solve the problem of water resource pollution, but its reduced product 4-AP can also be used in the fields of pesticides, dyes, surfactants, medicines and cosmetics to realize resource recycling. use. Therefore, the preparation of efficient catalytic materials to convert pollutant 4-NP into valuable 4-AP has become a research hotspot. [0003] The surface of carbon materials is rich in oxygen-containing functional groups, such as hydroxyl (OH) and alkoxyl (O-C), etc. These oxygen-containing functional groups can improve the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/44B01J37/34C02F1/70C02F101/34C02F101/38
CPCC02F1/70B01J23/44B01J37/349C02F2101/345C02F2101/34C02F2101/38
Inventor 底兰波张腾达张秀玲赵倩周钰发
Owner DALIAN UNIV