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Preparation method of manganese tungsten single-crystalline nanowire

A manganese tungstate single crystal and nanowire technology, applied in nanotechnology, nanotechnology, chemical instruments and methods, etc., can solve the problems of complicated operation, expensive template, complicated operation of template method, etc., and achieve the effect of good quality.

Inactive Publication Date: 2014-12-10
LUOYANG INST OF SCI & TECH
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Problems solved by technology

The introduction of surfactants will pollute the environment and the operation is complicated
At present, only Americans have successfully prepared manganese tungstate nanowires by using the template method, but the template method only limits the growth of crystals from the outside, and the crystal particles are agglomerated to form a template shape, so only tungstic acid is obtained Manganese polycrystalline nanowires, and the template method is complicated to operate, the template is expensive, and pollution is easy to occur during the removal of the template after the reaction

Method used

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preparation example Construction

[0016] As shown in the figure, a method for preparing manganese tungstate single crystal nanowires comprises the following steps:

[0017] Step 1, prepare the deionized aqueous solution of manganese chloride, potassium sodium tartrate and potassium carbonate respectively;

[0018] Step 2, take the manganese chloride deionized aqueous solution prepared in step 1 and the potassium sodium tartrate deionized aqueous solution and mix according to equimolar amounts to obtain a manganese tartrate precipitation solution as a reaction precursor for subsequent use;

[0019] Step 3, adding the potassium carbonate deionized aqueous solution prepared by equimolar step 1 in the manganese tartrate precipitation solution obtained in step 2, after mixing uniformly, add it into a hydrothermal reaction kettle to carry out hydrothermal reaction, generate manganese carbonate precipitation solution, and set aside;

[0020] Step 4. Cool the hydrothermal reaction kettle in step 3 to room temperature,...

Embodiment 1

[0026] Step 1, dissolving manganese chloride in deionized water to form an aqueous manganese chloride solution, adjusting the concentration of manganese chloride in the solution to be 0.1mol / L;

[0027] Step 2, sodium potassium tartrate is dissolved in deionized water to form an aqueous solution of sodium potassium tartrate, and the concentration of sodium sodium tartrate in the adjustment solution is 0.1mol / L;

[0028] Step 3, dissolving potassium carbonate in deionized water to form an aqueous solution of potassium carbonate, adjusting the concentration of potassium carbonate in the solution to be 0.1mol / L;

[0029] Step 4, mixing the manganese chloride solution prepared in step 1 with the potassium sodium tartrate solution prepared in step 2 according to equimolarity to obtain manganese tartrate precipitate as a reaction precursor;

[0030] Step 5. Mix the potassium carbonate solution prepared in step 3 with the manganese tartrate precipitation solution prepared in step 4 a...

Embodiment 2

[0035] Step 1, dissolve manganese chloride in deionized water to form an aqueous manganese chloride solution, and adjust the concentration of manganese chloride in the solution to be 2.1mol / L;

[0036] Step 2, potassium sodium tartrate is dissolved in deionized water to form potassium sodium tartrate aqueous solution, and the concentration of potassium sodium tartrate in the adjustment solution is 2.1mol / L;

[0037] Step 3, potassium carbonate is dissolved in deionized water to form an aqueous solution of potassium carbonate, and the concentration of potassium carbonate in the adjustment solution is 2.1mol / L;

[0038] Step 4, mixing the manganese chloride solution prepared in step 1 with the potassium sodium tartrate solution prepared in step 2 according to equimolarity to obtain manganese tartrate precipitate as a reaction precursor;

[0039] Step 5. Mix the potassium carbonate solution prepared in step 3 with the manganese tartrate precipitation solution prepared in step 4 a...

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Abstract

The invention discloses a preparation method of a manganese tungsten single-crystalline nanowire. The method comprises the following steps: firstly, preparing a manganese tungsten precursor by using manganese chloride, potassium carbonate and sodium potassium tartrate tetrahydrate; and then mixing sodium tungstate with the prepared manganese tungsten precursor; and carrying out hydrothermal reaction at 120-200 DEG C, so as to obtain the manganese tungsten single-crystalline nanowire. The manganese tungsten single-crystalline nanowire has the advantages of controllable morphology, simple process and low cost, can be put into industrial production, and has a single-crystalline structure and a very high draw ratio; therefore, the preparation method has a very wide application prospect on the aspects of multiferroic materials, photocatalysts, photoluminescence, optical fibers, scintillators, humidity sensors and magnetic materials.

Description

technical field [0001] The invention relates to the field of inorganic non-metallic materials, in particular to a preparation method of manganese tungstate single crystal nanowires. Background technique [0002] Manganese tungstate is an important functional material with wolframite structure. It has broad application prospects in multiferroic materials, photocatalysts, photoluminescence, optical fibers, scintillators, humidity sensors and magnetic materials. [0003] Manganese tungstate nanowires have a large aspect ratio, fewer grain boundaries and defect sites, and more surface atoms, which can significantly improve their catalytic activity and often exhibit particularly excellent physical and chemical properties. Currently, the commonly used methods for preparing nanowires are template method and surfactant method. The introduction of surfactants will pollute the environment and the operation is complicated. At present, only Americans have successfully prepared mangane...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G45/00B82Y30/00B82Y40/00
Inventor 王永刚杨琳琳王晓峰王玉江陈建罗伟徐国辉
Owner LUOYANG INST OF SCI & TECH
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