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Preparation method of FexOy/SiO2 aerogel nano-composite

A nanocomposite material and airgel technology, which is applied in the field of preparation of FexOy/SiO2 airgel nanocomposite materials, can solve the problems of long processing time, high sintering temperature, high risk, etc., and achieve the change of harsh conditions and preparation process Controllable, evenly distributed effect

Inactive Publication Date: 2016-04-06
JIANGSU HUAXIA PAINT MAKING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are still some deficiencies in the preparation of composite materials and the removal of Congo red: high sintering temperature, high cost, high risk, and unfavorable for Fe 3 o 4 / SiO 2 and α-Fe 2 o 3 / SiO 2 Preparation of airgel nanomaterials; although the removal of Congo red has achieved a certain removal effect, the processing time is too long, which is not conducive to the wide application in production practice
[0003] Integrating the existing patented technology, the existing Fe 3 o 4 / SiO 2 and α-Fe 2 o 3 / SiO 2 The preparation of airgel mainly requires a high-temperature calcination process, and the high-temperature calcination conditions are harsh, which is not conducive to the formation of Fe 3 o 4 / SiO 2 and α-Fe 2 o 3 / SiO 2 Preparation of airgel

Method used

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  • Preparation method of FexOy/SiO2 aerogel nano-composite
  • Preparation method of FexOy/SiO2 aerogel nano-composite
  • Preparation method of FexOy/SiO2 aerogel nano-composite

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Experimental program
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Effect test

Embodiment 1

[0026] Weigh 0.433gFeCl 3 ·6H 2 O was dissolved in 3 mL ethanol and stirred until FeCl 3 ·6H 2 O was completely dissolved and 0.537 g H was added to the solution 2 O, then add 1.0g propylene oxide, stir vigorously for 3min, and let stand for 3min to 5min to form a brown-red gel. The gel was treated with TEOS, EtOH, H at 60°C 2 O is soaked in a mixed solution with a volume ratio of 10:9:1 for aging, and the solution is changed every 24 hours for a total of 6 times. The wet gel was placed in a 25mL polytetrafluoroethylene autoclave for solvothermal reaction, and 13mL of ethanol was added as a solvent for the solvothermal reaction. The reaction time was 24 hours and the reaction temperature was 200°C. After the reaction, it was naturally cooled to room temperature. The wet gel after the solvothermal reaction was soaked and washed with acetonitrile, and washed once every 12 hours, a total of 3 times. Place the washed wet gel in a vacuum drying oven at a controlled temperatu...

Embodiment 2

[0028] Weigh 0.433gFeCl 3 ·6H 2 O was dissolved in 3 mL ethanol and stirred until FeCl 3 ·6H 2 O was completely dissolved and 0.537 g H was added to the solution 2 O, then add 1.0g propylene oxide, stir vigorously for 3min, and let stand for 3min to 5min to form a brown-red gel. The gel was treated with TEOS, EtOH, H at 60°C 2O is soaked in a mixed solution with a volume ratio of 10:9:1 for aging, and the solution is changed every 24 hours for a total of 6 times. The wet gel was placed in a 25mL polytetrafluoroethylene autoclave for solvothermal reaction, and 13mL of ethylene glycol was added as a solvent for the solvothermal reaction. The reaction time was 24h and the reaction temperature was 200°C. After the reaction, it was naturally cooled to room temperature. The wet gel after the solvothermal reaction was soaked and washed with acetonitrile, and washed once every 12 hours, a total of 3 times. Place the washed wet gel in a vacuum drying oven at a controlled tempera...

Embodiment 3

[0030] Weigh 0.433gFeCl 3 ·6H 2 O was dissolved in 3 mL ethanol and stirred until FeCl 3 ·6H 2 O was completely dissolved and 0.537 g H was added to the solution 2 O, then add 1.0g propylene oxide, stir vigorously for 3min, and let stand for 3min to 5min to form a brown-red gel. The gel was treated with TEOS, EtOH, H at 60°C 2 O is soaked in a mixed solution with a volume ratio of 10:9:1 for aging, and the solution is changed every 24 hours for a total of 6 times. The wet gel was placed in a 25mL polytetrafluoroethylene autoclave for solvothermal reaction, and 13mL of tert-butanol was added as a solvent for the solvothermal reaction. The reaction time was 24 hours and the reaction temperature was 200°C. After the reaction, it was naturally cooled to room temperature. The wet gel after the solvothermal reaction was soaked and washed with acetonitrile, and washed once every 12 hours, a total of 3 times. Place the washed wet gel in a vacuum drying oven at a controlled temp...

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Abstract

The invention discloses a preparation method of a FexOy / SiO2 aerogel nano-composite. The preparation method comprises the following steps: FeCl3.H2O is dissolved in ethyl alcohol firstly, deionized water is added and stirred, propylene oxide is added and stirred, the mixture is left to stand, obtained brown-red gel is soaked in a TEOS / EtOH / H2O mixed solution, a thermal reaction solvent is added to the obtained wet gel, the mixture is placed in an autoclave for thermal reaction, finally, the obtained Fe3O4 / SiO2 and alpha-Fe2O3 / SiO2 wet gel is soaked in acetonitrile and dried in vacuum, and a product is obtained. According to the method, high-temperature calcination is not needed, the technology is simple, the preparation process is easy to control, and the obtained Fe3O4 / SiO2 and alpha-Fe2O3 / SiO2 nano-composite has good treatment effect on a Congo red wastewater solution with high solubility, stability and durability and has great significance in environmental protection.

Description

technical field [0001] The invention belongs to the technical field of new material preparation, in particular to a Fe x o y / SiO 2 Preparation methods of airgel nanocomposites. Background technique [0002] Airgel is a porous condensed matter with a three-dimensional network structure that uses gas as a dispersion medium, and its porosity can reach 80% to 99.8%. Fe 3 o 4 / SiO 2 and α-Fe 2 o 3 / SiO 2 Aerogels have attracted extensive attention and research in recent years due to their smooth surface and good dispersion properties. This type of composite airgel nanomaterial is widely used in various fields, such as biological separation, enzyme immobilization, catalyst loading, wastewater treatment, etc., due to its large specific surface area, good chemical stability, low price, and surface functional group modification. . Congo red wastewater has become an important source of pollution because of its complex composition, deep color and large discharge. However, d...

Claims

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Application Information

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IPC IPC(8): B01J20/10B01J20/30B01J20/28C02F1/28
CPCB01J20/0229B01J20/10B01J20/28047B01J2220/4806C02F1/281
Inventor 谢吉民高金荣魏巍解宝盛徐艳侍明近韩合坤陆俊炜
Owner JIANGSU HUAXIA PAINT MAKING
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