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A kind of dye decomposition material and its preparation and application

A dye, cellulose solution technology, applied in water pollutants, other chemical processes, chemical instruments and methods, etc., can solve problems such as hard quality and poor material stability, and achieve simple production process, mild reaction conditions, and low pollution. Effect

Active Publication Date: 2019-08-06
安徽深呼吸纺织科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The materials prepared by this method have disadvantages such as poor stability and hard quality.

Method used

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  • A kind of dye decomposition material and its preparation and application
  • A kind of dye decomposition material and its preparation and application
  • A kind of dye decomposition material and its preparation and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Weigh 3 g of microcrystalline cellulose powder and 5.76 g of LiCl with a precision electronic balance, and take 70.72 ml of DMAc with a graduated cylinder. Add the weighed LiCl into a three-necked flask containing 70.72ml of DMAc, place it on a magnetic stirrer and stir to dissolve at a stirring speed of 400r / min. Immerse 3g of cellulose in 20ml of deionized water, stir for 4h, then vacuum filter; soak the obtained dry cellulose in 20ml of methanol, stir for 2h, then vacuum filter; soak the obtained dry cellulose in 20ml of DMAc, stir After 2 hours, carry out vacuum filtration; put the obtained dry cellulose into a three-necked flask filled with LiCl / DMAc solution. Install a condenser tube and a three-way tube on the three-necked flask, and use N 2 The balloon was sealed and reacted, placed on a stirrer and stirred at a stirring speed of 500r / min until the cellulose was completely dissolved, and the time was 24h. The obtained cellulose solution was placed at 4° C. for...

Embodiment 2

[0040]Weigh 4.5g of microcrystalline cellulose powder and 5.64LiCl with a precision electronic balance, and take 69.25ml of DMAc with a graduated cylinder. Add the weighed LiCl into a three-necked flask containing 69.25ml of DMAc, place it on a magnetic stirrer and stir to dissolve at a stirring speed of 400r / min. Immerse 4g of cellulose in 30ml of deionized water, stir for 4 hours, and vacuum filter; soak the obtained dry cellulose in 30ml of methanol, and vacuum filter after stirring for 2 hours; soak the obtained dry cellulose in 30ml of DMAc , after stirring for 2 h, carry out vacuum filtration; put the obtained dry cellulose into a three-necked flask filled with LiCl / DMAc solution. Install a condenser tube and a three-way tube on the three-necked flask, and use N 2 The balloon was sealed and reacted, placed on a stirrer and stirred at a stirring speed of 300r / min until the cellulose was completely dissolved, and the time was 36h. The obtained cellulose solution was plac...

Embodiment 3

[0044] Weigh 3 g of microcrystalline cellulose powder and 5.76 g of LiCl with a precision electronic balance, and take 70.72 ml of DMAc with a graduated cylinder.

[0045] Add the weighed LiCl into a three-neck flask containing 70.72ml of DMAc, place it on a magnetic stirrer and stir to dissolve at a stirring speed of 500r / min.

[0046] Immerse 3g of cellulose in 20ml of deionized water, stir for 5h and carry out vacuum filtration; immerse the obtained dry cellulose in 30ml of methanol, and carry out vacuum filtration after stirring for 3h; immerse the obtained dry cellulose in 30ml of DMAc, After stirring for 3 hours, perform vacuum filtration; put the obtained dry cellulose into a three-necked flask filled with LiCl / DMAc solution. Install a condenser tube and a three-way tube on the three-necked flask, and use N 2 The balloon was sealed and reacted, placed on a stirrer and stirred at a stirring speed of 500r / min until the cellulose was completely dissolved, and the time was...

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Abstract

The invention relates to a dye decomposing material and preparation and application thereof. The dye decomposing material is a titanium dioxide / cellulose porous three-dimensional composite material which has mesopores and three-dimensionally communicated macroporous structures, wherein the mesoporous pore diameters are 20-30nm, the macropore diameters are 0.5-6[mu]m, and the macroporous framework is 0.3-2[mu]m. The preparation comprises the steps: performing activation by taking cellulose as a raw material; dissolving the cellulose with a LiCl / DMAc solution; then dropwise adding a poor solvent into the stirred titanium dioxide / cellulose solution; and then performing standing phase separation, displacement by acetone many times and drying to obtain the titanium dioxide / cellulose porous three-dimensional composite material. The titanium dioxide / cellulose porous three-dimensional composite material has mesopores and three-dimensionally communicated macroporous structures as well as a relatively large specific surface area, so that the material can effectively adsorb dyes and improve the efficiency of photo-catalytically decomposing the dyes.

Description

technical field [0001] The invention belongs to the field of decomposition materials and their preparation and application, in particular to a dye decomposition material and its preparation and application. Background technique [0002] Photocatalysts such as nano-TiO 2 Particles have the characteristics of wide catalytic range, high efficiency, and can effectively catalyze the degradation of various organic pollutants, and have broad application prospects in the fields of water and air purification. However, some powdery photocatalysts are difficult to recycle because of their fine particles, and the loss of active components of the catalyst is large, which is not conducive to the regeneration and reuse of the catalyst, which brings certain difficulties to the practical application. Therefore, loading photocatalysts on a suitable carrier can not only solve the problem of catalyst separation and recovery, but also overcome the disadvantages of poor stability and easy poison...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/24B01J20/28B01J20/30B01J21/06C02F1/28
CPCB01J20/24B01J20/28083B01J20/28085B01J21/063C02F1/286C02F2101/308C02F2103/30
Inventor 王新厚王坤鹏孙晓霞
Owner 安徽深呼吸纺织科技有限公司