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Variable valency metal catalyzed and doped tungsten bronze nano-short rod particle and preparation method thereof

A variable-valence metal and tungsten bronze technology, applied in chemical instruments and methods, tungsten compounds, inorganic chemistry, etc., can solve the problem that the heat shielding effect is not optimal, and achieve excellent light-to-heat conversion performance and wide application prospects

Active Publication Date: 2016-06-15
DALIAN POLYTECHNIC UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Benefits of technology

The inventors have developed special materials that work well at both visible (infrared) rays and invisible electromagnetic waves called infrared radiation or near IR). They found they could absorb more energy from these wavelength ranges than traditional blackout plates like charcoolite. This makes them useful for various applications such as thermal barrier coatings, solar cells, and medical treatments. Additionally, this new type of material was able to convert harmful chemical compounds into harmless substances through photosensitization with specific types of catalysts.

Problems solved by technology

This patents discuss different technical problem addressed by this patented technology relates to improving the efficiency and reducing greenhouse gas emissions associated with buildings' design while maintaining their durability over time. Current methods involve replacing or purchasing expensive window panels made up mostly of traditional glass but these options may only provide temporary benefits without being able to fully utilized because they require high maintenance costs. There exists a desire towards developing cost-effective ways to reduce environmental impact on construction projects caused by current techniques like replacement of siding glazers.

Method used

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  • Variable valency metal catalyzed and doped tungsten bronze nano-short rod particle and preparation method thereof
  • Variable valency metal catalyzed and doped tungsten bronze nano-short rod particle and preparation method thereof
  • Variable valency metal catalyzed and doped tungsten bronze nano-short rod particle and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0067] Preparation of Fe 0.1 -Cs 0.32 WO 3 Hexagonal Cesium Tungsten Bronze Nano Short Rod Particles

[0068] ①Weigh 6.3503g of sodium tungstate, add 30ml of deionized water, fully dissolve it, and quickly add 5mol / L hydrochloric acid under stirring to make the pH≤1, after stirring for 30min, a creamy yellow flocculent tungsten will be obtained The acid colloidal suspension is suction filtered to obtain a milky yellow solid colloidal tungstic acid with a certain volume; add the solid colloidal tungstic acid to 120ml of deionized water, and stir evenly under the auxiliary conditions of ultrasonic vibration to re-disperse it into a suspension Continue to filter with suction and repeat three times; then use 120ml of absolute ethanol to repeat the above operation and filter three times. Take out the resulting block gel and add an appropriate amount of absolute ethanol to make the total volume 77ml. Stir and re-disperse under ultrasonic shaking. Suspension to obtain a solid colloidal ...

Embodiment 2

[0073] Preparation V 0.1 -Cs 0.32 WO 3 Short nanorod particles

[0074] ①Preparation of solid colloidal tungstate ethanol suspension: same as step ① in Example 1

[0075] ② Preparation of reaction precursor liquid

[0076] Weigh 0.6g of cesium sulfate, add it to 40ml of solid colloidal tungstate ethanol dispersion, measure and add 70ml of acetylacetone, add 8.356g of oxalic acid, 1g of P123 inducer, and finally add 0.163g of vanadyl sulfate, stir 2h, obtain the reaction precursor liquid;

[0077] ③Powder synthesis, washing and drying

[0078] The reaction precursor was transferred to a 200ml autoclave and reacted continuously at 190℃ for 72h. The precipitate after the reaction was washed with water and alcohol for 3 times. After centrifugation, it was dried at 60℃ for 10h. According to XRD and EDS judged that the synthesized blue powder is V-doped V 0.1 -Cs 0.32 WO 3 Hexagonal cesium tungsten bronze.

Embodiment 3

[0080] Prepare Pt 0.1 -Cs 0.32 WO 3 Short nanorod particles

[0081] ①Preparation of solid colloidal tungstate ethanol suspension: same as step ① in Example 1

[0082] ② Preparation of reaction precursor liquid and powder synthesis

[0083] Weigh 0.6g of cesium sulfate and add it to 40ml of solid colloidal tungstate ethanol dispersion, then measure and add 65ml of absolute ethanol, add 5.3721g of sorbic acid, 1g of P123 inducer, and finally add 0.193mol / L of chlorine 5ml of platinic acid aqueous solution, stirred for 2h to obtain the reaction precursor; transfer the reaction precursor into a 200ml autoclave, and react continuously at 190℃ for 72h. The precipitate after the reaction was washed with water and alcohol for 3 times, and then centrifuged. After that, it was dried at 60℃ for 10 hours. According to XRD and EDS, the synthesized blue powder was Pt-doped Pt 0.1 -Cs 0.32 WO 3 Hexagonal cesium tungsten bronze.

[0084] The XRD spectrum of the synthesized Pt-doped cesium tungsten ...

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Abstract

The invention provides a variable valency metal catalyzed and doped tungsten bronze Ax-MyWO3 nano-short rod particle and a preparation method thereof. The method consists of: firstly making solid colloidal tungstic acid as a tungsten source, mixing the tungsten source with an M source, an appropriate solvent and an inducing agent, adding a proper amount of a variable valency metal A salt, and carrying out thermal reaction to synthesize the variable valency metal catalyzed and doped tungsten bronze Ax-MyWO3 multifunctional nanoparticle. The synthesized Ax-MyWO3 nano-short rod particle has excellent visible light permeability and near-infrared shielding performance and photothermal conversion ability, can be widely used for preparation of glass transparent thermal insulation paint, transparent and heat insulation compounds, photothermal absorbing coatings, solar thermal collectors, solar water heater coatings, heating fiber and photothermal therapy nanoparticles, etc. At the same time, the synthesized variable valency metal catalyzed and doped tungsten bronze Ax-MyWO3 nano-short rod particle also has excellent photocatalysis ability, and can be widely applied to the photocatalytic degradation field of organic pollutants.

Description

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Claims

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Application Information

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Owner DALIAN POLYTECHNIC UNIVERSITY
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