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Method for preparing zinc cobaltate nanoparticles by reverse microemulsion method

A nano-zinc cobaltate and solution technology, applied in nanotechnology, chemical instruments and methods, cobalt compounds, etc., can solve the problems of reproducibility of introduced impurities, poor product crystallinity, etc., and achieve high phase composition purity and crystallinity. Good results

Inactive Publication Date: 2020-04-17
NANJING UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The preparation methods of zinc cobaltate include hydrothermal method, urea combustion method, co-precipitation method, sol-gel method, etc., but such preparation methods have some disadvantages, such as poor crystallinity of the product, easy introduction of impurities during the preparation process, and poor repeatability Wait

Method used

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  • Method for preparing zinc cobaltate nanoparticles by reverse microemulsion method
  • Method for preparing zinc cobaltate nanoparticles by reverse microemulsion method
  • Method for preparing zinc cobaltate nanoparticles by reverse microemulsion method

Examples

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Effect test

Embodiment 1

[0022] The preparation method of this embodiment is as figure 1 shown, including the following steps:

[0023] (1) Measure 10g of isooctane and 4g of n-butanol into a beaker, put it into the rotor, and place it on a magnetic stirrer for continuous stirring. At the same time, weigh 3 g of cetyltrimethylammonium bromide, slowly Pour into the solution, and continue to stir until the solution has no obvious large particles;

[0024] (2) Divide the solution into two parts and mark them as solution A and solution B respectively. At this time, the solution is relatively turbid;

[0025] (3) Configure 1 M KOH solution, add 6 mL dropwise to the A solution obtained in step (2), and keep stirring until the solution becomes transparent and clear;

[0026] (4) Weigh zinc nitrate and cobalt nitrate and add them into the beaker according to the molar ratio of 1:2. The concentration of zinc nitrate is 0.8 mol / L, and the concentration of cobalt nitrate is 1.6 mol / L. Add 1.5 mL to the B solu...

Embodiment 2

[0032] The preparation method of the present embodiment comprises the following steps:

[0033] (1) Measure 8g of isooctane and 4g of isopropanol into a beaker, put it into the rotor, and place it on a magnetic stirrer for continuous stirring. At the same time, weigh 3 g of cetyltrimethylammonium bromide, slowly Pour into the solution, and continue to stir until the solution has no obvious large particles;

[0034] (2) Divide the solution into two parts and mark them as solution A and solution B respectively. At this time, the solution is relatively turbid;

[0035] (3) Configure 1.5 M NaOH solution, add 4 mL dropwise to the A solution obtained in step (2), and keep stirring until the solution becomes transparent and clear;

[0036] (4) Weigh zinc nitrate and cobalt nitrate into the beaker according to the molar ratio of 1:2, and prepare the concentration of zinc nitrate to be 0.8mol / L and the concentration of cobalt nitrate to be 1.6mol / L. Take 1.2mL and add it to the B sol...

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Abstract

The invention provides a method for preparing zinc cobaltate nanoparticles by a reverse microemulsion method. The method comprises the following steps: mixing an oil phase, a surfactant and a cosurfactant, and stirring until no large particles exist to obtain a mixed solution; dividing the solution into two equal parts, adding a strong alkali solution into one part, continuously stirring until thesolution is clear, adding a zinc salt solution and a cobalt salt solution which are prepared in proportion into the other part, and continuously stirring until the solution is clear; mixing the two solutions, and quickly stirring to enable the solutions to be uniform; reducing the stirring speed, and continuously stirring until a reaction is finished; and centrifugally washing the obtained mixedsolution, putting and drying the obtained precipitate in a drying oven, and carrying out heat treatment to obtain the zinc cobaltate nanoparticles. The preparation method is simple, the reaction conditions are mild, and the product crystallization effect is good.

Description

technical field [0001] The invention relates to the field of nanomaterial preparation, in particular to a method for preparing spinel nano-zinc cobaltate by using a reverse microemulsion method. Background technique [0002] Spinel refers to the general formula AB 2 o 4 Structure of a class of metal oxides. Among them, A and B are transition metal elements, A site includes manganese, iron, zinc, magnesium, nickel and other elements, B site includes cobalt, iron, aluminum and other elements, O is oxygen element, similarly includes MgAl 2 o 4 、NiCo 2 o 4 、FeCo 2 o 4 、MnCo 2 o 4 、ZnCo 2 o 4 Wait. At present, my country's electricity source mainly relies on thermal power generation. The disadvantage is that the non-renewable fossil fuels and the adverse effects on the environment caused by large-scale combustion, including the greenhouse effect, etc. As such environmental and energy issues become increasingly prominent, green and clean energy has received widespread...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G51/00B82Y40/00
CPCC01G51/40B82Y40/00C01P2002/72
Inventor 丁锡锋闫宇飞崔崇
Owner NANJING UNIV OF SCI & TECH
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