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A kind of alginate-based composite photocatalytic airgel material and preparation method thereof

A technology of gel materials and catalytic materials, applied in catalyst activation/preparation, chemical instruments and methods, organic compound/hydride/coordination complex catalysts, etc. Can not be reused and other problems, to achieve the effects of low cost, good adsorption performance, high visible light catalytic performance, and improved UV aging resistance

Active Publication Date: 2020-12-29
FUJIAN AGRI & FORESTRY UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, like other nanomaterials, powder photocatalytic nanomaterials face difficulties in protection, recycling and reuse during use, expensive nanofiltration technology and time-consuming separation process will hinder their industrialization process; at the same time, using Powder photocatalytic nanomaterials will cause catalyst loss and cannot be reused, which will greatly limit the practical application of powder photocatalysts in future environmental purification.

Method used

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  • A kind of alginate-based composite photocatalytic airgel material and preparation method thereof
  • A kind of alginate-based composite photocatalytic airgel material and preparation method thereof
  • A kind of alginate-based composite photocatalytic airgel material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] a) Weigh 0.1g commercial TiO 2 Nano-powder P25 was added to 100mL deionized water, mechanically stirred and ultrasonically dispersed for 1h to prepare nano-TiO with a concentration of 1g / L 2 Dispersions;

[0027] b) Under vigorous stirring, add 0.1 g sodium alginate to the above nano-TiO 2 In the dispersion liquid, stir vigorously to dissolve it completely. At this time, the concentration of sodium alginate in the solution is 1g / L, and then continue to stir for 1h;

[0028] c) Ultrasonic defoaming and vacuum pumping are performed on the above mixed solution. The ultrasonic time is 30 minutes, and the pumping time is 30 minutes, so as to discharge the gas dissolved in the mixed solution;

[0029] d) Pour the exhausted mixed solution into a petri dish with a diameter of 90mm for freeze-drying, cooling rate: 1°C / min, freezing temperature: -30°C, freezing time: 2h, then at -5°C, vacuum Dry under the condition of 200 Pa for 24h to obtain bulk material;

[0030] e) Put th...

Embodiment 2

[0035] a) Weigh 2g of bismuth nitrate hydrate and add it to 10ml of hydrochloric acid, stir at room temperature for 30min, then adjust the pH=4~7 with ammonia water, continue to stir at room temperature for 30min, centrifuge, wash, and finally dry at 110°C for 12h to obtain a white BiOCl powder; Take 0.2 g of the obtained BiOCl white powder, add it to 100 mL of deionized water, mechanically stir and ultrasonically disperse for 2 hours, and prepare a nano-BiOCl dispersion with a concentration of 2 g / L;

[0036] b) Under vigorous stirring, add 0.3 g of sodium alginate into the above-mentioned nano-BiOCl dispersion liquid, stir vigorously to dissolve it completely, at this time the concentration of sodium alginate in the solution is 3 g / L, and then continue to stir for 1 h;

[0037] c) Ultrasonic defoaming and vacuum pumping are performed on the above mixed solution. The ultrasonic time is 30 minutes, and the pumping time is 30 minutes, so as to discharge the gas dissolved in the ...

Embodiment 3

[0042] a) Weigh 1.5mmol of zinc chloride and add it to 75ml of water, stir until dissolved, then add 1mmol of InCl under stirring 3 4H 2 O, add 3mmol thioacetamide, stir for 30min, then transfer to a 100ml lined polytetrafluoroethylene autoclave, keep at 160°C for 12h, cool to room temperature, centrifuge, wash, and finally dry at 60°C for 12h to obtain Zn 3 In 2 S 6 Yellow powder; weigh the resulting Zn 3 In 2 S 6 Add 0.5g of powder into 100mL of deionized water, mechanically stir and ultrasonically disperse for 4 hours to obtain a concentration of 5g / L nano Zn 3 In 2 S 6 Dispersions;

[0043] b) Under vigorous stirring, add 0.5 g propylene glycol alginate to the above nano Zn 3 In 2 S 6 In the dispersion liquid, stir vigorously to make it dissolve completely. At this time, the concentration of propylene glycol alginate in the solution is 5g / L, and then continue to stir for 1 hour;

[0044] c) Ultrasonic defoaming and vacuum pumping are performed on the above mix...

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Abstract

The invention discloses an alginate-based composite photo-catalytic aerogel material and a preparation method thereof. The preparation method comprises the steps: ultrasonically and uniformly dispersing a nanometer photocatalytic material into water to prepare a suspension liquid; then, adding soluble alginate, pouring a mixed solution obtained after carrying out vigorous stir into a die, and carrying out freeze-drying; and placing the freeze-dried block material into a curing agent solution for curing, and then, further carrying out freeze-drying to obtain the alginate-based composite photo-catalytic aerogel material. The alginate-based composite photo-catalytic aerogel material prepared by using the preparation method has the characteristics such as high strength, low density, large specific surface area, high water resistance and simplicity in recycle, is simple in preparation process and has a great potential application value on the aspect of advanced treatment of a polluted waterbody.

Description

technical field [0001] The invention belongs to the field of high-performance photocatalytic materials, and in particular relates to an alginate-based composite airgel material with photocatalytic performance and a preparation method thereof. Background technique [0002] In recent years, with the development of photocatalytic technology, photocatalytic technology realized with the help of solar energy has shown great application potential in the fields of environmental pollution purification and conversion of solar energy into chemical energy. However, like other nanomaterials, powder photocatalytic nanomaterials face difficulties in protection, recycling and reuse during use, expensive nanofiltration technology and time-consuming separation process will hinder their industrialization process; at the same time, using Powder photocatalytic nanomaterials will cause catalyst loss and cannot be reused, so that the practical application of powder photocatalysts in future environ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J31/26B01J31/38B01J35/10B01J37/32
CPCB01J31/26B01J31/38B01J35/0013B01J35/004B01J35/006B01J35/0066B01J35/10B01J37/32
Inventor 田勤奋庄建东范毜仔戴举国魏文康孙乾乾曹圳谢伟臻
Owner FUJIAN AGRI & FORESTRY UNIV
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