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Alkali tungsten bronze nanorod and preparation method and application thereof

A technology of alkali tungsten bronze and nanorods, which is applied in the field of nanomaterials, can solve the problems of large particle size, poor reproducibility, and many impurities of alkali tungsten bronze products, and achieve the effects of unindustrialization, large output, and good dispersion

Inactive Publication Date: 2018-12-07
SHENZHEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to overcome the deficiencies of the prior art and provide an alkali tungsten bronze nanorod and its preparation method and application, aiming to solve the problems of large energy consumption, small output and heavy weight existing in the existing alkali tungsten bronze nano powder preparation method. Problems such as poor reproducibility and large particle size and many impurities of alkali tungsten bronze products produced by existing preparation methods

Method used

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  • Alkali tungsten bronze nanorod and preparation method and application thereof
  • Alkali tungsten bronze nanorod and preparation method and application thereof
  • Alkali tungsten bronze nanorod and preparation method and application thereof

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Experimental program
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Effect test

Embodiment 1

[0031] Weigh 0.02mol tungsten powder into a 500ml beaker, add 30mL H 2 o 2 (30%), and stirred in cold water to fully react the tungsten powder. After about 1 hour, the tungsten powder was completely reacted, filtered, stirred and heated in a water bath at 80°C, the solution changed from transparent yellowish to yellow sol, and after about 5 hours, about 10mL yellow sol. Add 0.18384g polyethylene glycol 600 (5% tungsten powder mass) to the sol, stir evenly, add 0.066 mol CsCl, stir evenly, and obtain a yellow gel. The gel was dried in a drying oven at 80°C to obtain the precursor. The precursor was placed in a tube furnace, and the temperature was raised to 600° C. for calcination for 2 h under an argon atmosphere to obtain cesium tungsten bronze nanorods.

[0032] The obtained powders were characterized by X-ray diffractometer, field emission scanning electron microscope and energy dispersive spectrometer.

[0033] figure 1 The X-ray diffraction spectrum of the cesium tun...

Embodiment 2

[0035] Weigh 0.02mol tungsten powder into a 500ml beaker, add 30mL H 2 o 2 (30%), and stirred in cold water to fully react the tungsten powder. After about 1 hour, the tungsten powder was completely reacted, filtered, stirred and heated in a water bath at 80°C, the solution changed from transparent yellowish to yellow sol, and after about 5 hours, about 10mL yellow sol. Add 0.18384g polyethylene glycol 600 (5% tungsten powder mass) to the sol, stir well, add 0.066 mol RbCl, stir well, and get a yellow gel. The gel was dried in a drying oven at 80°C to obtain the precursor. Put the precursor in a tube furnace, and raise the temperature to 600° C. for calcination for 2 hours under an argon atmosphere to obtain rubidium-tungsten bronze nanorods.

[0036] The obtained powders were characterized by X-ray diffractometer, field emission scanning electron microscope and energy dispersive spectrometer.

[0037] Figure 4 The X-ray diffraction spectrum of the rubidium tungsten bron...

Embodiment 3

[0039] Weigh 0.02mol tungsten powder into a 500ml beaker, add 30mL H 2 o 2 (30%), and stirred in cold water to fully react the tungsten powder. After about 1 hour, the tungsten powder was completely reacted, filtered, stirred and heated in a water bath at 80°C, the solution changed from transparent yellowish to yellow sol, and after about 5 hours, about 10mL yellow sol. Add 0.18384g polyethylene glycol 600 (5% tungsten powder mass) to the sol, stir evenly, add 0.033mol CsCl and 0.033mol RbCl, stir evenly, and obtain a yellow gel. The gel was dried in a drying oven at 80°C to obtain the precursor. Place the precursor in a tube furnace, and in an argon atmosphere, raise the temperature to 600° C. for calcination for 2 hours to obtain cesium-rubidium co-doped tungsten bronze nanorods.

[0040] The obtained powders were characterized by X-ray diffractometer, field emission scanning electron microscope and energy dispersive spectrometer.

[0041] Figure 7 The X-ray diffractio...

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Abstract

The invention relates to an alkali tungsten bronze nanorod, a preparation method and application thereof, and belongs to the technical field of nanometer materials. The preparation method of the alkali tungsten bronze nanorod comprises the following steps: dissolving tungsten powder in cold bath by using hydrogen peroxide, stirring till the tungsten powder completely reacts, filtering, stirring and heating in water bath to obtain sol; adding a dispersing agent to the sol, stirring uniformly, adding an alkali metal salt, continuing to stir uniformly to obtain the gel, drying the gel to obtain aprecursor, and calcining the precursor in a non-oxidizing atmosphere to obtain the alkali tungsten bronze nanorod. The alkali tungsten bronze nanorod prepared by the method has small particle size, good dispersion, good crystallinity and good reproducibility; the synthesis process of the alkali tungsten bronze nanorod is simple and efficient; the yield of the alkali tungsten bronze nanorod is great; raw materials are easily available; and the problem that alkali tungsten bronze nanometer materials cannot be industrialized is effectively solved.

Description

technical field [0001] The invention belongs to the technical field of nanometer materials, and in particular relates to an alkali tungsten bronze nanorod and its preparation method and application. Background technique [0002] Tungsten bronze (M x WO 3 , 0<x<1) has no definite stoichiometric ratio, and the value of x can vary within a certain range, and cannot be represented by a small integer ratio, so it is called a non-stoichiometric compound. m x WO 3 (0<x<1) M elements can be alkali metals, hydrogen, rare earth metals, calcium, strontium, barium, copper, silver, ammonium, etc., and metals such as molybdenum, titanium, tantalum, zirconium, and niobium can also be used to replace them Tungsten is used to generate other bronzes. This compound has good physical and chemical properties, such as high electronic conductivity and fast ion transport properties, and is a low-temperature superconductor. Non-stoichiometric compounds have some special physical and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G41/00B82Y40/00C09D7/61
CPCC01G41/00B82Y40/00C01G41/006C01P2002/72C01P2002/85C01P2004/03C01P2004/16C09D7/61C09D7/70
Inventor 吕维忠郑威猛
Owner SHENZHEN UNIV
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