Method for preparing neodymium vanadate nanowire bundles in hydrothermal mode

A technology of nanowires and vanadic acid, applied in chemical instruments and methods, vanadium compounds, inorganic chemistry, etc., can solve the problems of unfriendly environment, harsh conditions, complicated process, etc., and achieve single shape, controllable shape and size, and process simple effect

Inactive Publication Date: 2016-04-20
HUNAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, most of these preparation methods are complex in process, harsh in conditions, high in energy consumption, long in time, and unfriendly to the environment.

Method used

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  • Method for preparing neodymium vanadate nanowire bundles in hydrothermal mode
  • Method for preparing neodymium vanadate nanowire bundles in hydrothermal mode
  • Method for preparing neodymium vanadate nanowire bundles in hydrothermal mode

Examples

Experimental program
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Effect test

Embodiment 1

[0020] (1) Weigh 1.15mmolNa 2 Put EDTA into 5ml distilled water, stir it magnetically to dissolve it, then add 2ml 0.5mol / L neodymium nitrate solution and mix well;

[0021] (2) Weigh 1mmol ammonium metavanadate and 2mmol sodium hydroxide and dissolve them in 5mL of distilled water, stir until completely dissolved, then add it to the mixed solution obtained in step (1), adjust with 4mol / L NaOH solution When the pH value reaches 9.5, stir for 10 minutes;

[0022] (3) Transfer the above mixed solution to a stainless steel reaction kettle with a polytetrafluoroethylene liner, seal it, and after hydrothermal reaction at 180°C for 6 hours, cool it naturally to room temperature;

[0023] (4) Centrifuge the precipitate obtained (rotating speed is 4000r / min), wash the precipitate twice with distilled water and absolute ethanol respectively, centrifuge, put it into a 60°C drying oven and dry it for 12h to obtain the wire bundle nano-vanadium neodymium acid. figure 1 Curve 1 in the m...

Embodiment 2

[0025] (1) Weigh 1.15mmolNa 2 Put EDTA into 5ml distilled water, stir it magnetically to dissolve it, then add 2ml 0.5mol / L neodymium nitrate solution and mix well;

[0026] (2) Weigh 1mmol ammonium metavanadate and 2mmol sodium hydroxide and dissolve them in 5mL of distilled water, stir until completely dissolved, then add it to the mixed solution obtained in step (1), adjust with 4mol / L NaOH solution When the pH value reaches 8.5, stir for 10 minutes;

[0027] (3) Transfer the above mixed solution to a stainless steel reaction kettle with a polytetrafluoroethylene liner, seal it, and after hydrothermal reaction at 180°C for 48 hours, cool it naturally to room temperature;

[0028] (4) Centrifuge the obtained precipitate (rotating speed is 4000r / min), wash the precipitate twice with distilled water and absolute ethanol respectively, centrifuge, put it in a drying oven at 70°C for 12 hours, and then obtain the wire-like nano Neodymium vanadate. figure 1 The middle curve 2 i...

Embodiment 3

[0030] (1) Weigh 0.69mmolNa 2 Put EDTA into 5ml distilled water, stir it magnetically to dissolve it, then add 1ml 0.6mol / L neodymium nitrate solution and mix well;

[0031] (2) Weigh 0.6mmol ammonium metavanadate and 1.2mmol sodium hydroxide and dissolve them in 5mL of distilled water, stir until completely dissolved, then add them to the mixed solution obtained in step (1), and use 4mol / L NaOH Adjust the pH of the solution to 10 and stir for 10 minutes;

[0032] (3) Transfer the above mixed solution to a stainless steel reaction kettle with a polytetrafluoroethylene liner, seal it, and after hydrothermal reaction at 180°C for 24 hours, cool it naturally to room temperature;

[0033] (4) Centrifuge the obtained precipitate (rotating speed: 4000r / min), wash the precipitate twice with distilled water and absolute ethanol respectively, centrifuge, and put it in a drying oven at 80°C for 12 hours to obtain a wire-like nanometer Neodymium vanadate. figure 1 The middle curve 3 i...

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Abstract

The invention discloses a method for preparing neodymium vanadate nanowire bundles in a hydrothermal mode. The method mainly includes the steps that a neodymium nitrate aqueous solution and a Na2EDTA aqueous solution are mixed evenly to obtain mixed liquor, a sodium vanadate aqueous solution is added, the pH is regulated to 8-10, the mixed liquor is stirred evenly and then placed in a stainless steel reaction still with a teflon liner to be sealed, and the mixed liquor is subjected to a hydrothermal reaction for 6-50 h at 140-180 DEG C and then naturally cooled to the room temperature; obtained precipitate is subjected to centrifugal separation, washed several times through distilled water and absolute ethyl alcohol respectively and dried at 60-80 DEG C, and then the neodymium vanadate nanowire bundles are obtained. The preparing method is simple in process, good in repeatability, low in cost, free of calcination as the reaction is conducted at the low temperature and suitable for industrial production; the obtained product is high in purity, singular in morphology and good in dispersity, the overall length can be regulated and controlled from hundreds of nanometers to several micrometers or so by controlling the reaction conditions, and the length-diameter ratio of the nanowires and the size of fantails can also be effectively regulated and controlled by controlling the reaction conditions.

Description

technical field [0001] The invention belongs to the technical field of preparation of inorganic nanometer materials, and in particular relates to a method for hydrothermally preparing neodymium vanadate nanowire bundles. Background technique [0002] In recent years, with the rapid development of nanotechnology, people's attention to nanomaterials has shifted from simply studying their unique optical, electrical, magnetic, and catalytic properties to designing and constructing new nanocomposites and nanoself-assembled structures. . Nano self-assembly system is an important frontier topic in modern materials physical chemistry, and it is also the leading direction of nanomaterials research. How to control the size, morphology, composition and structure of functional nanounits in the system has also become a key technical problem. At present, the methods for preparing nano-assembly materials mainly include gas phase method, chemical liquid phase method, hydrothermal method, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G31/00
CPCC01G31/00C01P2002/72C01P2004/03C01P2004/50
Inventor 田俐赵瑞妮王金晶王会锋李斐
Owner HUNAN UNIV OF SCI & TECH
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