A loaded flower-like m x the w 3 /sio 2 Composite airgel particles and preparation method thereof

A composite aerogel and composite gel technology are applied in the field of preparing flower-like MxWO3/SiO2 composite aerogel particles, which can solve problems such as unreported, and achieve excellent adsorption performance and high near-infrared absorption/shielding performance. , the effect of high pore volume

Active Publication Date: 2022-02-18
DALIAN POLYTECHNIC UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, currently the in situ synthesis process is used to prepare the loaded flower-like M x WO 3 Nanoparticles of SiO 2 The study of composite airgel has not been reported yet

Method used

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  • A loaded flower-like m <sub>x</sub> the w <sub>3</sub> /sio <sub>2</sub> Composite airgel particles and preparation method thereof
  • A loaded flower-like m <sub>x</sub> the w <sub>3</sub> /sio <sub>2</sub> Composite airgel particles and preparation method thereof
  • A loaded flower-like m <sub>x</sub> the w <sub>3</sub> /sio <sub>2</sub> Composite airgel particles and preparation method thereof

Examples

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preparation example Construction

[0033] A loaded flower-like M x WO 3 / SiO 2 The preparation method of composite airgel particle comprises the following process steps:

[0034] ①Dissolve tungstate in water to obtain a tungstate solution with a concentration of 0.01-5mol / L;

[0035] ②Dissolve silicate into water to obtain a silicate solution with a concentration of 0.01-5mol / L;

[0036] ③Convert the prepared tungstate solution and silicate solution into tungstic acid solution and silicic acid solution respectively by cation exchange method;

[0037] ④Measure a certain volume of silicic acid solution and tungstic acid solution, mix under stirring conditions, and add a certain amount of M salt and inducer, stir and mix evenly, and prepare a mixed sol;

[0038] ⑤Aging the mixed sol at a temperature of 20-90°C until it turns into a gel;

[0039] ⑥ Place the composite gel block in absolute ethanol or ethanol aqueous solution, and age at 20-60°C for 1-24 hours;

[0040] ⑦ Select an appropriate solvent as the r...

Embodiment 1

[0057] Example 1 Preparation of loaded flower-like Cs with Si / W molar ratio = 5:1 0.5 WO 3 SiO 2 composite airgel

[0058] ① Preparation of silicic acid and tungstic acid solutions by ion exchange method

[0059] The preparation of silicic acid: put the industrial water glass with a modulus of 3.0 into V 水玻璃 :V 水 =1:4 diluted with deionized water, and then ion-exchanged through a styrene-based cation-exchange resin to obtain silicic acid with a pH of 2 to 3;

[0060] Preparation of tungstic acid: first weigh 19.791g sodium tungstate dihydrate and dissolve in 80mL deionized water to prepare Na 2 WO 4 solution, and then undergo ion exchange through a styrene-based cation exchange resin to obtain a tungstic acid solution with a concentration of 0.75mol / L and a pH of 1.5-3.

[0061] ②Preparation of mixed sol and gel

[0062] Under stirring conditions, weigh 30mL of silicic acid solution, 9.36mL of tungstic acid solution, 0.6351g of cesium sulfate, and 8.3189g of citric aci...

Embodiment 2

[0071] Example 2 Preparation of loaded flower-like Cs with Si / W molar ratio = 3:1 0.5 WO 3 SiO 2 composite airgel

[0072] ① Preparation of silicic acid and tungstic acid solutions by ion exchange method is the same as step ① in Example 1.

[0073] ②Preparation of mixed sol and gel

[0074] Under stirring conditions, weigh 25mL of silicic acid solution, 13mL of tungstic acid solution, 0.7942g of cesium carbonate, and 3.44g of oxalic acid and mix them in sequence to prepare a mixed sol; place the mixed sol in a 60°C water bath to make it gel.

[0075] ③ Composite gel aging and solvothermal reaction are the same as step ③ in Example 1.

[0076] Place the composite gel in 50% ethanol aqueous solution and age at 25°C for 24 hours; then measure 50mL of ethanol to prepare a reaction solution for the gel block, place the composite gel block in the reaction liquid, and react at 190°C After 72h, the solvothermal reaction was completed.

[0077] ④The modification and atmospheric p...

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Abstract

The invention relates to a load flower-like M x WO 3 / SiO 2 The invention discloses a method for preparing composite airgel particles, which belongs to the technical field of new materials, energy conservation and environmental protection. A loaded flower-like M x WO 3 / SiO 2 The preparation method of composite airgel particles comprises the following process steps: adding M salt and inducer after mixing silicic acid solution and tungstic acid solution, stirring and mixing uniformly to prepare mixed sol; aging the mixed sol; The chemically treated composite gel is placed in the reaction liquid, reacted at 120-400° C. for 5-96 hours, and then is modified by modification and then dried under normal pressure. The preparation method has low raw material and process costs, a short production cycle, and low requirements on production equipment, can improve the production efficiency of the airgel, and facilitate the realization of large-scale industrial production.

Description

technical field [0001] The invention relates to a load flower-like M x WO 3 / SiO 2 The invention discloses a method for preparing composite airgel particles, which belongs to the technical field of new materials, energy conservation and environmental protection. Background technique [0002] With the development of society and the improvement of productivity, the energy crisis and environmental pollution are becoming more and more serious, and energy saving and consumption reduction and environmental purification are increasingly concerned by the whole society. Reducing the energy consumption of buildings is one of the main ways to save energy and reduce emissions, and windows are an important medium for indoor and outdoor energy exchange. The preparation of a transparent heat-insulating film on the surface of the glass can achieve the ideal heat-insulating performance of the glass while ensuring a certain visible light transmittance, and the photocatalytic technology of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J13/00
CPCB01J13/0091
Inventor 史非刘敬肖杨静媛宋晓颖
Owner DALIAN POLYTECHNIC UNIVERSITY
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