A thermal shock preparation method and application of multi-principal alloy nanoparticles

A multi-principal alloy and nanoparticle technology, which is applied in nanotechnology, nanotechnology, chemical instruments and methods, etc., can solve the problem of complex components of multi-principal alloy hydrogen storage alloys, uneven distribution of particle elements and sizes, and unavoidable problems. Intermetallic compound precipitation and other problems, to achieve the advantages of excellent hydrogen storage kinetic performance, uniform structure, and the effect of improving kinetic performance

Active Publication Date: 2021-12-03
INST OF NUCLEAR PHYSICS & CHEM CHINA ACADEMY OF
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  • Abstract
  • Description
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Problems solved by technology

However, the existing multi-principal hydrogen storage alloys have the disadvantages of poor hydrogen storage kinetics, which are mainly reflected in the following two aspects: the traditional multi-principal hydrogen storage alloys are in the form of bulk or powder. The size of the alloy particles is large, and the scale is on the order of microns; the components of the multi-principal alloy hydrogen storage alloy are complex. The preparation of meta-alloy nanoparticles will inevitably have the problems of precipitation of intermetallic compounds and uneven distribution of elements and sizes of the prepared particles.

Method used

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  • A thermal shock preparation method and application of multi-principal alloy nanoparticles
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  • A thermal shock preparation method and application of multi-principal alloy nanoparticles

Examples

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Embodiment 1

[0036] 1. Composition design of multi-principal alloy nanoparticles.

[0037] This embodiment is a multi-principal element hydrogen storage alloy TiZr nanoparticle composed of two elements, Ti and Zr.

[0038] 2. Preparation of multi-principal alloy nanoparticles.

[0039] The preparation of multi-principal alloy nanoparticles is the most critical step, and the preparation process is as follows:

[0040] 1) Raw material preparation: Weigh the metal salts of the two elements Ti and Zr respectively (titanocene dichloride C 10 h 10 Cl 2 Ti, titanium zirconium acetylacetonate C 20 h 28 o 4 Zr), the present embodiment selects the salt as high-purity (purity is more than 97%); It is respectively 10ml of dehydrated ethanol salt solution that configuration two kinds of metal salt concentrations are 0.025mol / l.

[0041] 2) Mixed solution: Take equal volumes (1ml each) of prepared salt solutions, add them to a centrifuge tube and mix them, place them in an ultrasonic cleaner for ...

Embodiment 2

[0053] 1. Difference description.

[0054] This embodiment synthesizes multi-principal element hydrogen storage alloy TiZrHfNb nanoparticles, the specific implementation is the same as Example 1, the difference is that the raw material is a salt of Ti, Zr, Hf and Nb (titanocene dichloride C 10 h 10 Cl 2 Ti, titanium zirconium acetylacetonate C 20 h 28 o 4 Zr, hafnium tetrachloride Cl 4 Hf and niobium pentachloride Cl 5 Nb); the concentrations of the four metal salts are 0.0125 mol / l; the synthesis time is 5s.

[0055] 2. Characterization of multi-principal alloy nanoparticles.

[0056] 1) Scanning electron microscope morphology analysis

[0057] Select a single crystal silicon with a suitable size, ultrasonically clean it (cleaning sequence is acetone, deionized water, absolute ethanol) in the air, and add an appropriate amount of absolute ethanol (make Graphene has good dispersibility), the graphene solution (>10μl) was dropped on the single crystal silicon, dried by...

Embodiment 3

[0064] 1. Difference description.

[0065] This embodiment synthesizes TiZrHfMoNb nanoparticles of a multi-principal element hydrogen storage alloy. 10 h 10 Cl 2 Ti, titanium zirconium acetylacetonate C 20 h 28 o 4 Zr, hafnium tetrachloride Cl 4 Hf, molybdenum chloride ClMo and niobium pentachloride Cl 5 Nb); the concentrations of the five metal salts are 0.0125mol / l; the synthesis time is 15s.

[0066] 2. Characterization of multi-principal alloy nanoparticles.

[0067] 1) Scanning electron microscope morphology analysis

[0068] Select a single crystal silicon with a suitable size, ultrasonically clean it (cleaning sequence is acetone, deionized water, absolute ethanol) in the air, and add an appropriate amount of absolute ethanol (make Graphene has good dispersibility), the graphene solution (>10μl) was dropped on the single crystal silicon, dried by an ultraviolet heating lamp, and the morphology of the sample was observed with a scanning electron microscope. Dep...

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Abstract

The invention discloses a thermal shock preparation method of multi-principal alloy nanoparticles. The prepared nanoparticle alloy composition is Ti a Zr b f c Mo d Nb e (5≤a≤55, 10≤b≤65, 0≤c≤20, 0≤d≤20, 0≤e≤65, a+b+c+d+e=100), the statistical average size of nanoparticles The diameter range is between 18-89nm, and the particle size can be adjusted by thermal shock time. The preparation process is as follows: preparation of raw materials, mixing solution, preparation of thermal shock base material, thermal shock, and finally using ultrasonic cleaning equipment to separate graphene grown with multi-principal alloy nanoparticles from carbon fiber strips. The invention also discloses a thermal shock preparation method or the application of multi-principal alloy nanoparticles. The multi-principal alloy nanoparticles prepared by the present invention have special hydrogen storage characteristics, and the nano-alloy particles have certain advantages in the field of hydrogen storage materials. Application prospect.

Description

technical field [0001] The invention relates to the technical field of nanomaterial preparation, in particular to a thermal shock preparation method of multi-principal alloy nanoparticles. Background technique [0002] Compared with traditional materials, nanomaterials have some special effects (such as quantum size effect, small size effect, interface effect, macroscopic quantum tunneling effect), based on their large specific surface area and nanometer size effect, the preparation of nanomaterials may make the reaction kinetics The performance has been significantly improved, and it has important application value in accelerating the reaction rate. Hydrogen is the preferred carrier for the future zero-carbon economy, and among many hydrogen storage technologies, solid-state hydrogen storage has unique advantages in terms of hydrogen storage density and safety. Due to its element diversity and wide adjustment of element ratio, multi-principal hydrogen storage alloys may me...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25C5/02B82Y30/00B82Y40/00C01B3/00
CPCB82Y30/00B82Y40/00C01B3/0031C25C5/02Y02E60/32
Inventor 张鉴玮申华海李鹏程周晓松黄刚张伟光
Owner INST OF NUCLEAR PHYSICS & CHEM CHINA ACADEMY OF
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