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Hexagonal crystal tungsten bronze short rod nanoparticles and preparation method thereof

A technology of tungsten bronze and hexagonal crystal, which is applied in the field of tungsten bronze nano-rod particles and its preparation, can solve the problems of dark color, small shielding range, and reduced transparency of heat-insulating films, and achieve high uniformity, improve uniformity, and reduce The effect of small average size

Active Publication Date: 2016-04-20
DALIAN POLYTECHNIC UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most transparent heat-shielding particles still have various deficiencies, such as: the silver multilayer film is not stable in the air, and needs to be made into a multilayer film by expensive sputtering, resulting in a high price; antimony tin oxide (ATO) and indium tin oxide (ITO) have a small shielding range in the near-infrared band, and their shielding properties are poor in the wavelength range of 780-1200nm (Chinese Journal of Nonferrous Metals, 2008, 18(1); Journal of Composite Materials, 2013, 30(5)); and LaB 6 It not only absorbs infrared rays in the near-infrared band, but also absorbs electromagnetic waves in the visible light range, resulting in the color of the heat insulation film being too dark and the transparency greatly reduced.

Method used

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  • Hexagonal crystal tungsten bronze short rod nanoparticles and preparation method thereof
  • Hexagonal crystal tungsten bronze short rod nanoparticles and preparation method thereof
  • Hexagonal crystal tungsten bronze short rod nanoparticles and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0065] Preparation of Cs 0.32 WO 3 Hexagonal cesium tungsten bronze nanorod particles

[0066] ①Weigh 6.3503g of sodium tungstate, add 30ml of deionized water, fully dissolve, and quickly add 5mol / L hydrochloric acid under stirring conditions to make the pH ≤ 1, after stirring for 30min, milky yellow flocculent tungsten Acid colloidal suspension, after suction filtration, to obtain milky yellow solid colloidal tungstic acid with a certain volume; add solid colloidal tungstic acid to 120ml deionized water, stir evenly under the condition of ultrasonic vibration, and make it redisperse into a suspension solution, continue to filter, repeat three times; then use 120ml of absolute ethanol to repeat the above operation, filter three times, take out the obtained massive gel and add an appropriate amount of absolute ethanol to make the total volume 77ml, stir and redisperse under the condition of ultrasonic vibration Suspension, obtain solid colloidal tungstic acid ethanol dispersi...

Embodiment 2

[0071] Preparation of Cs 0.32 WO 3 Hexagonal cesium tungsten bronze nanorod particles

[0072] ①Preparation of solid colloidal tungstic acid ethanol dispersion: same as step ① in Example 1

[0073] ② Preparation of reaction precursor and powder synthesis

[0074] Weigh 0.6g of cesium sulfate, add it to 40ml solid colloidal tungstic acid ethanol dispersion, then measure and add 70ml of acetylacetone, finally add 4.536g of ascorbic acid, 1g of P123 inducer, stir for 2h, and obtain the reaction precursor; The reaction precursor solution was transferred into a 200ml autoclave, and reacted continuously at 190°C for 72 hours. The precipitate after the reaction was washed with water and alcohol for 3 times in sequence, and after centrifugation, it was dried at 60°C for 10 hours to obtain a blue Cs 0.32 WO 3 Hexagonal cesium tungsten bronze powder.

Embodiment 3

[0076] Preparation of Cs 0.32 WO 3 Hexagonal cesium tungsten bronze nanorod particles

[0077] ①Preparation of solid colloidal tungstic acid ethanol dispersion: same as step ① in Example 1

[0078] ② Preparation of reaction precursor and powder synthesis

[0079] Weigh 0.6g of cesium sulfate, add it to 40ml of solid colloidal tungstic acid ethanol dispersion, then measure and add 60ml of acetylacetone, finally add 10ml of acetic acid, 1g of P123 inducer, stir for 2h, and obtain the reaction precursor; The precursor solution was transferred into a 200ml autoclave, and reacted continuously at 190°C for 72 hours. The precipitate after the reaction was washed with water and alcohol for 3 times, and after centrifugation, it was dried at 60°C for 10 hours to obtain blue Cs 0.32 WO 3 Hexagonal cesium tungsten bronze powder.

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Abstract

The invention discloses a preparation method for preparing hexagonal tungsten bronze short rod nanoparticles MxWO3 with tungstate as the raw material, and belongs to the field of the nanometer technology and the field of energy conservation and environment protection. The method includes the steps of preparing high-specific-surface-area solid colloidal wolframic acid through a cation exchange method or a rapid acidification method, and synthesizing the hexagonal tungsten bronze short rod nanoparticles MxWO3 through a thermal reaction with the solid colloidal wolframic acid as the tungsten source, wherein the synthesized short rod nanoparticles are small in size and high in granularity uniformity, are in a short rod nanometer shape, have the advantages of being quite good in dispersibility and the like, and are particularly suitable for preparing a transparent thermal insulating coating and a thin film of the transparent thermal insulating coating. The visible light permeability and near infrared shielding / thermal insulating performance of the prepared powder can be further improved through nitrogen thermal treatment or reduction thermal treatment. The method is suitable for preparing the glass transparent thermal insulating coating and thermal insulating and heating compounds such as a thermal insulating thin film, a thermal insulating curtain, a solar thermal collector, a solar water heater coating, heating fiber, a thermal insulating and heat preservation plate and photothermal therapy.

Description

technical field [0001] The invention relates to a tungsten bronze nano-rod particle and a preparation method thereof, in particular to a hexagonal tungsten bronze nano-rod particle prepared by using cheap tungstate as a raw material and a method thereof. Background technique [0002] With the development of society and the improvement of productivity, people's demand for energy is increasing. Due to the large amount of polluted smoke and harmful gases produced in the process of energy consumption, various environmental problems such as greenhouse effect and acid rain will be caused. etc. are also receiving increasing attention from the whole society. Therefore, energy saving and consumption reduction are issues that must be considered in the sustainable economic development of all countries. The near-infrared light in the solar spectrum accounts for about 46%. In the energy consumption of many countries, building energy consumption accounts for about 30-40% of the national ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G41/00B82Y30/00B82Y40/00
CPCC01G41/00C01P2002/72C01P2004/03C01P2004/04C01P2004/16C01P2004/54
Inventor 史非范传彦刘敬肖
Owner DALIAN POLYTECHNIC UNIVERSITY
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