Preparation method of rhodium metal nanoparticles

A technology of metal nanoparticles and metals, which is applied in the field of preparation of rhodium metal nanoparticles, can solve the problems of long reduction time and large nanoparticles, and achieve the effects of fast reduction reaction speed, uniform particles and good catalytic performance

Pending Publication Date: 2021-03-05
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method uses glow discharge plasma to reduce noble metals in an argon atmosphere. This method is simple in equipment and easy to operate, but it also has certain defects, such as high voltage at both ends of the electrodes, low gas pressure needs to be controlled, and long reduction time. , the obtained nanoparticles are larger, etc.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0024] Specifically, the preparation method of rhodium metal nanoparticles provided by the invention comprises the following steps:

[0025] S1, placing the mixed solution of the rhodium-containing solution and the auxiliary agent in a plasma discharge gas atmosphere;

[0026] S2, under the action of alternating current, the plasma formed by the discharge of the plasma discharge gas reduces the rhodium ions in the mixed solution into rhodium metal nanoparticles.

[0027] The rhodium-containing solution in the present invention includes a rhodium metal salt solution, preferably a rhodium metal chloride salt solution. After plasma glow discharge treatment, the rhodium ions in the rhodium metal salt in the rhodium-containing solution are reduced into rhodium metal nanoparticles.

[0028] In step S1, the auxiliary agent includes perchloric acid. The perchloric acid adopted in the present invention is pure perchloric acid. The auxiliary agent in the present invention destroys th...

Embodiment 1

[0039] will contain H 3 RhCl 6 , FeCl 3 and NiCl 2 A mixed solution of rhodium-containing solution and pure perchloric acid (H 3 RhCl 6 The molar mass of rhodium ions in HClO 4 The mass ratio of 1:25mol / g) is placed between the two electrode plates of the discharge tube in the vacuum chamber, sealed, the vacuum chamber is evacuated, and then filled with argon as the discharge gas, at normal pressure, 150V is applied to the electrode AC voltage, reduction of H by plasma glow discharge 3 RhCl 6 , the reduction time is 8min, and the rhodium metal nanoparticles are obtained, the purity is 99.95%, and the particle diameter is 7-14nm measured by transmission electron microscope.

Embodiment 2

[0041] will contain H 3 RhCl 6 , Fe 2 (SO 4 ) 3 and NiSO 4 A mixed solution of rhodium-containing solution and pure perchloric acid (H 3 RhCl 6 The molar mass of rhodium ions in HClO 4The mass ratio of 1:15mol / g) is placed between the two electrode plates of the discharge tube in the vacuum chamber, sealed, the vacuum chamber is evacuated, and then filled with air as the discharge gas, under normal pressure, 300V AC is applied to the electrodes voltage, using plasma glow discharge to reduce H 3 RhCl 6 , the reduction time is 15 minutes, and the rhodium metal nanoparticles are prepared, the purity is 99.95%, and the particle diameter is 9-17nm measured by transmission electron microscope.

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Abstract

The invention relates to a preparation method of rhodium metal nanoparticles. The preparation method comprises the following steps: carrying out plasma glow discharge treatment on a rhodium-containingsolution and assistant mixed solution to reduce rhodium ions in the mixed solution into the rhodium metal nanoparticles. According to the method, rhodium ions in the rhodium-containing solution are reduced by adopting a plasma glow discharge method, so that introduction of a reducing reagent is avoided, and the method is environment-friendly. Moreover, the preparation method provided by the invention is simple and can be carried out at normal temperature and normal pressure. In addition, the rhodium metal nanoparticles prepared by the preparation method provided by the invention are small inparticle size, high in purity and uniform in granularity, and have a wide application prospect.

Description

technical field [0001] The invention belongs to the technical field of material science, and in particular relates to a preparation method of rhodium metal nanoparticles. Background technique [0002] Nanoparticles generally refer to particles with a particle size between 1-100nm. Noble metal nanoparticles have always been the focus of research in the field of catalysis, because noble metal nanoparticles have many advantages, such as small particle size, large specific surface area, and high catalytic efficiency. In addition, noble metal nanoparticles have unique optical, electrical and catalytic properties. These characteristics make it of great application value in the fields of surface plasmon optics, biochemical sensing, and catalysis. [0003] The current method of preparing metal nanoparticles is mainly the chemical reduction method, which requires adding a strong reducing agent into the solution to reduce the metal compound into metal particles. The disadvantage of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/24B22F1/00B82Y30/00B82Y40/00
CPCB22F9/24B82Y30/00B82Y40/00B22F1/054
Inventor 董岩李坚安欣袁滨刘玉芬
Owner CHINA PETROLEUM & CHEM CORP
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