Unlock instant, AI-driven research and patent intelligence for your innovation.

Method for preparing tungsten oxide with array micro/nano structure

A tungsten oxide and nanostructure technology, applied in the field of powder metallurgy, can solve the problems of small length of nanometer tungsten oxide, the distribution uniformity needs to be further improved, etc., to achieve the effects of low cost, rapid growth promotion, and wide application prospect.

Active Publication Date: 2021-02-26
JIANGXI UNIV OF SCI & TECH
View PDF9 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Long Huiwu et al. mixed deionized water and absolute ethanol to make a reaction solvent, then added Na2WO4 · 2H2 O solid stirring, then adding oxalic acid solid stirring, and finally adjusting the pH of the solution to strong acidity; the resulting solution was hydrothermally prepared into a hydrated tungsten oxide nanorod array; the preparation of the hydrated tungsten oxide nanorod array under the condition of no template was realized, but its The length of the obtained nano-tungsten oxide array is small (less than 1 μm), and the distribution uniformity needs to be further improved

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for preparing tungsten oxide with array micro/nano structure
  • Method for preparing tungsten oxide with array micro/nano structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Embodiment 1, a method for preparing an array micro / nano structure tungsten oxide, specifically follows the steps below:

[0032] S1, according to WO in ammonium tungstate solution 3 The mass ratio of chromium oxide in quality, glucose and ammonium chromate is 1:4:0.002 and takes by weighing ammonium tungstate solution, glucose and ammonium chromate; Wherein, the WO in ammonium tungstate 3 The content is 150g / l;

[0033] S2, adding the weighed glucose and ammonium chromate into the ammonium tungstate solution, fully stirring until completely dissolved;

[0034] S3, eutectoid crystallization of the dissolved mixed solution and alcohol, the alcohol and ammonium tungstate solution have the same volume; then put it into an oven for drying, the drying temperature is 160°C, and the drying time is 6 hours;

[0035] S4, take out the dried solution, fully grind it, pass through a 200-mesh sieve, put it into a crucible, and put it into an atmosphere furnace for heat treatment. ...

Embodiment 2

[0036] Embodiment 2, a method for preparing an array micro / nano structure tungsten oxide, specifically follows the following steps:

[0037] S1, according to WO in ammonium tungstate solution 3 The mass ratio of chromium oxide in quality, glucose and ammonium chromate is 4:1:0.016 and takes by weighing ammonium tungstate solution, glucose and ammonium chromate; Wherein, the WO in the ammonium tungstate solution 3 The content is 300g / l;

[0038] S2, adding the weighed glucose and ammonium chromate into the ammonium tungstate solution, fully stirring until completely dissolved;

[0039]S3, eutectoid crystallization of the dissolved mixed solution and alcohol, alcohol and ammonium tungstate solution in the same volume; then put it into an oven for drying, the drying temperature is 220°C, and the drying time is 2 hours;

[0040] S4, take out the solution after drying, fully grind, pass through a 80-mesh sieve, put it into a crucible, and put it into an atmosphere furnace for hea...

Embodiment 3

[0041] Embodiment 3, a method for preparing an array micro / nano structure tungsten oxide, specifically according to the following steps:

[0042] S1, according to WO in ammonium tungstate solution 3 The mass ratio of chromium oxide in quality, glucose and ammonium chromate is 4:7:0.01 and takes by weighing ammonium tungstate solution, glucose and ammonium chromate; Wherein, the WO in the ammonium tungstate solution 3 The content is 200g / l;

[0043] S2, adding the weighed glucose and ammonium chromate into the ammonium tungstate solution, fully stirring until completely dissolved;

[0044] S3, eutectoid crystallization of the dissolved mixed solution and alcohol, the alcohol and ammonium tungstate solution have the same volume; then put it into an oven for drying, the drying temperature is 165°C, and the drying time is 1.5h;

[0045] S4, take out the solution after drying, fully grind, pass through a 80-mesh sieve, put it into a crucible, and put it into an atmosphere furnace...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
lengthaaaaaaaaaa
lengthaaaaaaaaaa
diameteraaaaaaaaaa
Login to View More

Abstract

The invention discloses a method for preparing tungsten oxide with an array micro / nano structure. The method specifically comprises the following steps: weighing a tungsten salt solution, glucose anda chromium salt according to the mass ratio of WO3 in the tungsten salt solution to the glucose to chromium oxide in the chromium salt of 1: 4: 0.002-4: 1: 0.016; adding weighed glucose and the chromium salt into the tungsten salt solution, and fully stirring until the glucose and the chromium salt are completely dissolved; carrying out eutectoid crystallization on a dissolved mixed solution and alcohol, wherein the volume of the alcohol is the same as that of the tungsten salt solution; drying in a drying oven; and taking out the dried precursor, fully grinding, adding into a crucible, putting into an atmosphere furnace, and carrying out heat treatment at the temperature of 600-1300 DEG C for 1-3h under the atmosphere of mixed gas of N2 and O2 to obtain the tungsten oxide with the array micro / nano structure. The method realizes preparation of the tungsten oxide nanorod array with a large length-diameter ratio under a template-free condition, is simple to operate and relatively low incost, and is suitable for large-scale industrial production.

Description

technical field [0001] The invention belongs to the technical field of powder metallurgy and relates to a method for preparing array micro / nano structure tungsten oxide. Background technique [0002] As a transition group element, tungsten has an outer electron configuration of 5d46s2, and its valence can be +2, +3, +4, +5, +6, and its oxides mainly include WO 3 , WO 2.92 , WO 2.70 and WO 2 . Tungsten oxide has special optical, electrical, magnetic, and mechanical properties due to its different valence states and valence electron configurations. It has applications in many aspects such as discoloration, luminescence, catalysis, and sensing. A vital tool for the potential of materials and smart devices. At the same time, the microscopic morphology of nanomaterials has a great influence on its properties. The array micro / nano structure is a multi-level micro / nano structure self-assembled by a one-dimensional micro / nano structure (such as: rod, wire, tube), with a mesopo...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C01G41/02B82Y40/00
CPCC01G41/02B82Y40/00C01P2004/16
Inventor 羊求民唐彦渊王胜楠徐飞燕陈丽勇徐国钻毛莉
Owner JIANGXI UNIV OF SCI & TECH