Method for continuous and rapid preparation of nano nickel by microfluidics technology

A nano-nickel and microfluidic technology, applied in nanotechnology and other directions, can solve the problems of environmental pollution, product quality, lack of controllability of particle size distribution and morphology, and high investment, and achieve fast mass transfer rate, continuous Fast preparation, uniform reaction effect

Inactive Publication Date: 2014-04-23
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Some of these methods have high investment in equipment, and some pollute the environment. The traditional liquid phase method also has the characteristics of low cost and simple operation, but there are deficiencies in product quality, particle size distribution, dispersion and shape controllability.

Method used

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  • Method for continuous and rapid preparation of nano nickel by microfluidics technology
  • Method for continuous and rapid preparation of nano nickel by microfluidics technology
  • Method for continuous and rapid preparation of nano nickel by microfluidics technology

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Such as figure 1 As shown, the microfluidic technology continuously and rapidly prepares the method for nano-nickel, and its specific steps are as follows:

[0020] (1) First, 6.5gNiSO 4 ·6H 2 Dissolve O in distilled water, adjust the pH of the solution to 12 by adding lye (NaOH solution), then add a surfactant under the condition of a stirring rate of 500r / min and mix evenly for 0.5h to obtain a nickel salt mixed solution, in which the surfactant For polyvinylpyrrolidone (PVP), NiSO 4 ·6H 2 The molar ratio of O to added surfactant is 1:1;

[0021] (2) Dissolve the reducing agent in distilled water to prepare a reducing solution, wherein the reducing agent is sodium borohydride, NiSO 4 ·6H 2 The molar ratio of O to sodium borohydride added is 1:4;

[0022] (3) Pump the nickel salt mixed solution obtained in step (1) and the reducing solution obtained in step (2) into the channel of the Y-shaped microreactor for micro-mixing reaction, and the mixed solution is cle...

Embodiment 2

[0024] Such as figure 1 As shown, the microfluidic technology continuously and rapidly prepares the method for nano-nickel, and its specific steps are as follows:

[0025] (1) First, 6.5gNiSO 4 ·6H 2 O was dissolved in distilled water, and the pH of the solution was adjusted to 12 by adding lye (NaOH solution), and then a surfactant was added and mixed evenly for 0.75 hours at a stirring rate of 600r / min to obtain a nickel salt mixed solution, in which the surfactant For polyvinylpyrrolidone (PVP), NiSO 4 ·6H 2 The molar ratio of O to added surfactant is 1:2;

[0026] (2) Dissolve the reducing agent in distilled water to prepare a reducing solution, wherein the reducing agent is sodium borohydride, NiSO 4 ·6H 2 The molar ratio of O to added sodium borohydride is 1:6;

[0027] (3) Pump the nickel salt mixed solution obtained in step (1) and the reducing solution obtained in step (2) into the channel of the Y-shaped microreactor for micro-mixing reaction, and the mixed so...

Embodiment 3

[0029] Such as figure 1 As shown, the microfluidic technology continuously and rapidly prepares the method for nano-nickel, and its specific steps are as follows:

[0030] (1) First, 6.5gNiSO 4 ·6H 2 Dissolve O in distilled water, adjust the pH of the solution to 9 by adding lye, then add a surfactant at a stirring rate of 300r / min and mix evenly for 1 hour to obtain a nickel salt mixed solution, wherein the surfactant is hexadecyl Trimethylammonium bromide (CTAB), NiSO 4 ·6H 2 The molar ratio of O to the added cetyltrimethylammonium bromide is 1:4;

[0031] (2) Dissolve the reducing agent in distilled water to prepare a reducing solution, wherein the reducing agent is potassium borohydride, NiSO 4 ·6H 2 The molar ratio of O to the added reducing agent is 1:4;

[0032] (3) Pump the nickel salt mixed solution obtained in step (1) and the reducing solution obtained in step (2) into the channel of the Y-shaped microreactor for micro-mixing reaction, and the mixed solution ...

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Abstract

The invention relates to a method for continuous and rapid preparation of nano nickel by the microfluidics technology and belongs to the technical field of synthesis of nanomaterial by microfluidics and microreactor technology. The method includes: dissolving NiS04.6H21 into distilled water, regulating PH (power of Hydrogen) of a solution, adding a surfactant, and mixing well for configuration to obtain a nickel salt mixed solution; dissolving a reducing agent into the distilled water for configuration to obtain a reducing solution; pumping the nickel salt mixed solution and the reducing solution obtained in the above steps into a Y-shaped microreactor channel for micro-mixing reaction, and subjecting the mixed solution to cleaning, separating and vacuum low-temperature drying treatment to obtain black nickel nanoparticles. The method has the advantages of being high in mixed mass transfer rate, even in reaction, continuously stable and the like by combining the microfluidics technology; featuring in wet reduction, the nano nickel is subjected to micro-mixing in the Y-shaped microreactor channel, so that the continuous and rapid preparation of the nano nickel is realized.

Description

technical field [0001] The invention relates to a method for continuously and rapidly preparing nano-nickel by micro-fluid technology, and belongs to the technical field of nano-material synthesis by micro-fluid and micro-reactor technology. Background technique [0002] Nano-nickel has high surface activity, good electrical conductivity and thermal conductivity, and has broad application prospects in catalysis, magnetic materials, sintering activators, conductive pastes, surface coating materials, batteries, hard alloy binders, etc. Hotspots for external development. Regarding the preparation of nano-nickel, there are mainly pyrolysis method, sputtering method, sol-gel method, hydrothermal and non-hydrothermal chemical reduction method, ultrasonic chemical deposition method, nickel oxyhydroxide thermal decomposition method and so on. Some of these methods have high investment in equipment, and some pollute the environment. The traditional liquid phase method also has the c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/24B82Y40/00
Inventor 许磊彭金辉李思颖张利波夏仡魏亚乾夏洪应周俊文巨少华代林晴黄巍
Owner KUNMING UNIV OF SCI & TECH
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