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Preparation method of grain size controllable ordered mesoporous Ni nanoparticles

A nanoparticle and mesoporous technology, which is applied in the field of preparation of ordered mesoporous Ni nanoparticles, can solve problems such as irregular shapes, and achieve the effects of controllable particle size, easy control of preparation parameters, and high specific surface area

Active Publication Date: 2019-08-09
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Great progress has been made in the synthesis of ordered mesoporous metallic materials by soft-templating and hard-templating methods, but the morphologies of the products obtained by these two methods are limited to irregularly shaped powders and thin films on conductive substrates.

Method used

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  • Preparation method of grain size controllable ordered mesoporous Ni nanoparticles
  • Preparation method of grain size controllable ordered mesoporous Ni nanoparticles
  • Preparation method of grain size controllable ordered mesoporous Ni nanoparticles

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The preparation method of ordered mesoporous Ni nanoparticles with controllable particle size, the steps are as follows:

[0021] 1) First configure a certain amount of pH=2 hydrochloric acid solution, and then add a certain amount of nickel chloride hexahydrate (NiCl 2 ·6H 2 O), palladium chloride (PdCl) 2 ), hydrochloric acid solution and nonionic surfactant cetyl ethoxylate (Brij 58) were heated and stirred continuously at 80°C until a homogeneous solute liquid crystal mixture was formed. where NiCl 2 ·6H 2 O: PdCl 2 : Aqueous HCl: The mass ratio of Brij 58 is 3:1.25×10 -2 :2.75:5.

[0022] 2) Add dimethylaminoborane (DMAB) to the solute liquid crystal mixture prepared in step 1) to jointly reduce Pd ions and Ni ions (wherein dimethylaminoborane and NiCl) 2 ·6H 2 The mass ratio of O was (1.0-1.3):3, and the reduction reaction temperature was 15°C. At the beginning of the reduction reaction, due to the standard electrode potential of Pd (E 0 =0.915V) higher ...

Embodiment 2

[0026] The preparation method of ordered mesoporous Ni nanoparticles with controllable particle size, the steps are the same as those in Example 1, the difference is that the reduction reaction temperature in step 2) is 20°C.

[0027] The mesoporous order of the ordered mesoporous Ni nanoparticles with controlled particle size prepared by this method is partially destroyed.

Embodiment 3

[0028] Example 3 (ie comparative example)

[0029] The preparation method of ordered mesoporous Ni nanoparticles with controllable particle size, the steps are the same as those in Example 1, the difference is that the reduction reaction temperature in step 2) is 30°C.

[0030] The mesoporous order of the ordered mesoporous Ni nanoparticles with controlled particle size prepared by this method is completely destroyed, as image 3 shown. The experimental results show that the higher reaction temperature will increase the reaction rate, thereby destroying the order of the mesopores.

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Abstract

The invention relates to a preparation method of grain size controllable ordered mesoporous Ni nanoparticles and belongs to the technical field of Ni nanoparticles. The preparation method comprises the following steps: uniformly mixing a template mixture containing a Ni source, a Pd source and a high concentration nonionic surfactant cetanol polyoxyethylene ether (Brij 58) to self-assemble a metalsource-containing solute liquid crystal; carrying out a reaction on Pd ions, the standard electrode potentials of which are relatively high, and a reducer dimethylammonoborane (DMAB) preferably to generate a reaction cores and carrying out a reaction continuously on Ni ions and DMAB; after the reaction, removing a solute liquid crystal soft template to obtain the ordered mesoporous Ni nanoparticles; and controlling the amount of palladium chloride in a precursor liquid, and controlling the average grain size of the ordered mesoporous Ni nanoparticles at 70-200 nm. The preparation method provided by the invention is easy to operate and control. The obtained Ni nanoparticles are ordered in mesopore, controllable in grain size and narrow in distribution and have a very good application prospect.

Description

technical field [0001] The invention relates to a preparation method of ordered mesoporous Ni nanoparticles with controllable particle size, and belongs to the technical field of mesoporous Ni materials. Background technique [0002] Ordered mesoporous nanoparticles have the advantages of high specific surface area, ordered mesopores, and controllable particle size. Compared with ordered mesoporous silica and carbon nanoparticles, ordered mesoporous metal nanoparticles not only possess the general characteristics of ordered mesoporous materials, but also possess high electrical and thermal conductivity and excellent catalytic activity. Much progress has been made in the synthesis of ordered mesoporous metallic materials by soft-template and hard-template methods, but the morphologies of the products obtained by these two methods are limited to irregularly shaped powders and thin films on conductive substrates. Therefore, precise control of the size and morphology of nanopar...

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 徐联宾米雪琴孙婷婷董静陈建峰
Owner BEIJING UNIV OF CHEM TECH
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