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Synthetic method of cesium tungstate nano particles

A nanoparticle and synthesis method technology, which is applied in the field of synthesis of cesium tungstate nanoparticles, can solve the problems of high energy consumption for synthesis, poor powder dispersion, and high requirements for reaction equipment, and achieve mild reaction conditions, low reaction temperature, and strong absorption. intensity effect

Active Publication Date: 2018-12-07
PEKING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] As mentioned above, at present, nano-cesium tungstate still has disadvantages such as uneven particle size of the target product, poor powder dispersibility, high requirements for reaction equipment and high energy consumption during the synthesis process, which seriously restrict the production of nano-tungsten. Application of Cesium Acid Thermal Insulation Materials in Building Energy Saving and Other Fields

Method used

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  • Synthetic method of cesium tungstate nano particles
  • Synthetic method of cesium tungstate nano particles
  • Synthetic method of cesium tungstate nano particles

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] (1) Add 0.352g tungsten carbonyl, 0.665g oxidizing agent and 4mL oleylamine to a 50mL four-necked round bottom flask;

[0042] (2) Heating the solution in (1) to 180°C under the protection of an inert gas. During the heating process, the solution first turns yellow and then turns green. When the temperature reaches 180°C, the solution becomes colorless;

[0043] (3) At this point, quickly inject 2.8 mL of the prepared ammonium oleate octadecene solution into the round-bottomed flask with a syringe, and continue heating to 250° C.;

[0044] (4) After reacting for 3 hours, the container containing the reaction solution was placed in a mixture of ice and water and rapidly cooled to room temperature to quench the reaction and obtain a dark blue solution.

[0045] (5) Add 10 mL of ethanol to the above solution to precipitate the nanoparticles, and cesium tungstate nanoparticles can be obtained after centrifugation.

[0046] The crystal structure of the synthesized cesium tu...

Embodiment 2

[0050] (1) Add 0.352g tungsten carbonyl, 0.665g oxidizing agent and 4mL oleylamine to a 50mL four-necked round bottom flask;

[0051] (2) Heating the solution in (1) to 180°C under the protection of an inert gas. During the heating process, the solution first turns yellow and then turns green. When the temperature reaches 180°C, the solution becomes colorless;

[0052] (3) At this point, quickly inject 2.8 mL of the prepared ammonium oleate octadecene solution into the round-bottomed flask with a syringe, and continue heating to 290° C.;

[0053] (4) After reacting for 3 hours, the container containing the reaction solution was placed in a mixture of ice and water and rapidly cooled to room temperature to quench the reaction and obtain a dark blue solution.

[0054] (5) Add 10 mL of ethanol to the above solution to precipitate the nanoparticles, and cesium tungstate nanoparticles can be obtained after centrifugation.

[0055] The crystal structure of the synthesized cesium tu...

Embodiment 3

[0059] (1) Add 0.352g tungsten carbonyl, 0.665g oxidizing agent and 8mL oleylamine to a 50mL four-necked round bottom flask;

[0060] (2) Under the condition of inert gas protection, the solution in (1) is first heated to 160°C. During the heating process, the solution first turns yellow, then turns green, and when the temperature reaches 180°C, the solution becomes colorless;

[0061] (3) At this point, quickly inject 2.8 mL of the prepared ammonium oleate octadecene solution into the round-bottomed flask with a syringe, and continue heating to 270° C.;

[0062] (4) After reacting for 4 hours, the container containing the reaction solution was placed in a mixture of ice and water and rapidly cooled to room temperature to quench the reaction and obtain a dark blue solution.

[0063] (5) Add 10 mL of ethanol to the above solution to precipitate the nanoparticles, and cesium tungstate nanoparticles with a particle size of 18±3 nm can be obtained after centrifugation.

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Abstract

The invention discloses a synthetic method of cesium tungstate nano particles. The method comprises the following steps: dissolving tungsten hexacarbonyl and an oxidizing agent in an organic solvent,uniformly carrying out mixing to obtain a mixed solution, heating the mixed solution to 150-180 DEG C under the protection of protective gas, then adding an octadecene solution of cesium oleate, carrying out heating to 250-300 DEG C, carrying out reaction for 0.5-48 hours, and carrying out cooling and post-treatment on the obtained reaction liquid to obtain the cesium tungstate nano particles. Thenano particles prepared by the preparation method have relatively strong absorption capacity in a near-infrared band of 800-1500 nm, and weak absorption capacity in a visible light wave band of 400-800 nm.

Description

technical field [0001] The invention belongs to the field of preparation of inorganic metal oxides, in particular to a synthesis method of cesium tungstate nanoparticles. Background technique [0002] Tungsten bronze is a kind of interstitially doped tungsten oxide, such oxides generally have the general formula M x WO 3 to express in the form, where M + It can be lithium, sodium, potassium, cesium, rubidium and other metal ions. Tungsten bronze is characterized by high transmittance in the visible light region and strong absorption in the near-infrared region. The selective absorption of near-infrared light by tungsten bronze makes it have broad application prospects in building energy-saving fields such as near-infrared light shielding films and electrochromic smart films. [0003] At present, the synthesis methods of tungsten bronze compound materials mainly include wet chemical synthesis, solvothermal synthesis and thermal reduction synthesis. Among them, the wet ch...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G41/00
CPCC01G41/00C01P2002/72C01P2002/82C01P2002/84C01P2004/04C01P2004/51C01P2004/64
Inventor 杨槐梁霄陈梅张兰英李辰悦张翠红
Owner PEKING UNIV
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