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Method for preparing ruthenium nanoparticles without container

A nanoparticle, container-less technology, applied in the direction of nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve the problems of complex preparation methods, wide range of ruthenium nanoparticles particle size, and complicated preparation process

Active Publication Date: 2020-06-19
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the ruthenium nanoparticles prepared by existing methods may have a wide particle size range, or the preparation method is complicated.
For example, the particle size of nano-ruthenium prepared in patent CN110606806A is between 1 and 100 nm, and the particle size distribution range is wide; and for example, although the particle size of nano-ruthenium in patent CN105498761A is between 1 and 4 nm, the preparation time is too long and the preparation process is complicated

Method used

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  • Method for preparing ruthenium nanoparticles without container
  • Method for preparing ruthenium nanoparticles without container
  • Method for preparing ruthenium nanoparticles without container

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Step (1): Under normal temperature and pressure, take 3.27mg of RuCl 3 ·3H 2 O particles, dissolved in 2.5 mL HO 2 O, to get RuCl 3 ·3H 2 O solution (concentration 5mM). Take 13.3mg of PVP (MW: 58000) powder, dissolve in 2mL H 2 O, obtain PVP solution (concentration 60mM). Take 1.42mg of NaBH 4 powder, dissolved in 0.5mL H 2 O, get NaBH 4 solution (concentration 75mM).

[0038] Step (2): Take 2.5mL of RuCl prepared in step (1) 3 ·3H 2 O solution was added to 2mL of the prepared PVP solution, and oscillated to make it evenly mixed.

[0039] Step (3): Under normal temperature and pressure, adjust the ultrasonic power of the acoustic levitation instrument to 350W, the ultrasonic frequency to 21KHz, the cross-sectional diameter of the plane transmitting end to 30mm, the curvature radius of the concave reflecting end (spherical surface) to 25mm, and the cross-sectional diameter to 25mm .

[0040] Step (4): Adjust the distance between the emitting end and the ref...

Embodiment 2～5

[0044] The operation steps are the same as in Example 1, and some detailed parameters are shown in Table 1.

[0045] The preparation condition of table 1 embodiment 1~5

[0046] Example 1 2 3 4 5 Ultrasonic power / W 350 250 450 300 400 Suspension time / min 10 5 30 15 20 React environment Temperature and pressure Temperature and pressure Temperature and pressure Temperature and pressure Temperature and pressure The relative molecular mass of PVP 58000 40000 10000 58000 58000 Concentration of PVP / mM 60 60 60 65 70 RuCl 3 ·3H 2 Concentration of O / mM

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Abstract

The invention relates to the technical field of nanoparticle preparation, in particular to a method for preparing ruthenium nanoparticles without a container. The method comprises the following stepsof (1) performing acoustic suspension on a mixed solution of RuCl3.3H2O and polyvinylpyrrolidone to obtain a suspension; and (2) under the acoustic suspension condition of the step (1), adding a NaBH4solution into the suspension, and carrying out a reduction reaction to obtain suspended ruthenium nanoparticles, wherein during the acoustic suspension, the ultrasonic power of an acoustic suspensioninstrument is 250 to 450W, the ultrasonic frequency is 20 to 22KHz, and the distance between a reflecting end and an emitting end is 15 to 30mm. According to the method, the ruthenium nanoparticles are prepared by reducing the RuCl3.3H2O solution with the NaBH4 solution in a stable suspension state in a container-free environment provided by an acoustic suspension technology, so that the preparation process is simple, and the prepared ruthenium nanoparticles are relatively small in particle size and narrow in particle size distribution.

Description

technical field [0001] The invention relates to the technical field of preparing nanoparticles, in particular to a method for preparing ruthenium nanoparticles without a container. Background technique [0002] The non-container technology refers to the use of the force generated by the external physical field to offset the gravity of the object, so that the object is in a non-contact and non-container state. As a ground simulation experiment method for simulating the microgravity environment effect in space, the suspended containerless technology has particularity and magic in terms of material preparation. Materials prepared under conventional conditions may be processed and prepared by container-free technology, and unexpected effects may be obtained. Compared with other levitation methods, acoustic levitation containerless technology is not limited by the electromagnetic properties of materials, and can handle low melting point metal materials. It has become an importan...

Claims

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Application Information

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IPC IPC(8): B22F9/24B22F1/00B82Y30/00B82Y40/00
CPCB22F9/24B82Y30/00B82Y40/00B22F1/054
Inventor 阮莹郑宇航庄强魏炳波
Owner NORTHWESTERN POLYTECHNICAL UNIV
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