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Preparation method of modified natural wood material and application of modified natural wood material in sewage purification

A wood material and natural technology, applied in the field of preparation of modified natural wood materials, can solve the problems of unsustainable utilization, high cost, complicated preparation, etc., and achieve the effects of ensuring cleanliness and safety and low operation cost.

Active Publication Date: 2022-07-08
HARBIN INST OF TECH SHENZHEN GRADUATE SCHOOL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, currently used photothermal materials such as carbon-based nanomaterials, semiconductor-based materials, and plasmonic metal-based materials all have problems such as complex preparation, high cost, and low efficiency, making it difficult to achieve sustainable utilization in the true sense. Feasibility of promotion and application is poor

Method used

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  • Preparation method of modified natural wood material and application of modified natural wood material in sewage purification
  • Preparation method of modified natural wood material and application of modified natural wood material in sewage purification
  • Preparation method of modified natural wood material and application of modified natural wood material in sewage purification

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preparation example Construction

[0045]The preparation method of the lignin removal solution in the embodiment of the present invention is as follows: dissolving 0.2 mol of sodium acetate in 150 mL of deionized water, dropwise adding glacial acetic acid to adjust the pH value to 4.6, then adding deionized water to 300 mL, and then adding 0.07 mol Sodium chlorite, stirring and dissolving to obtain a lignin removal solution.

[0046] The infrared thermal imager used in the test example of the present invention is Fluke 55Plus.

[0047] The precision electronic balance used in the test example of the present invention is Lichen FA224C.

[0048] The brand of the spectrophotometer used in the test examples of the present invention is Shimadzu UV3600.

Embodiment 1

[0050] A preparation method of modified natural wood material, comprising the steps:

[0051] S1. Put the wood into the lignin removal solution, react in an oil bath at 100°C for 6 hours, wash the wood 3 times with deionized water, then put the wood into deionized water for 12 hours, and then put it in -20 After pre-freezing at ℃ for 24h, freeze-drying for 12h to obtain delignified wood;

[0052] 1g TiO 2 and 5ml of deionized water and absolute ethanol into a 10ml centrifuge tube, centrifugally washed 3 times, and dried at 60°C in an oven, the TiO 2 Put it into a corundum crucible, heat it up to 800°C at a rate of 10°C / min under an argon atmosphere, and cool it to room temperature after 2 hours of reaction to obtain black TiO 2 ;

[0053] S2. Put 0.5g of the black TiO 2 Put it into 5 mL of absolute ethanol, disperse by ultrasonic for 30 min, then drop-coat and modify it on the de-lignified wood in 3 times, and dry it in an oven at 60° C. to obtain the modified natural wood...

Embodiment 2

[0059] A preparation method of modified natural wood material, comprising the steps:

[0060] S1. Put the wood into the lignin removal solution, react in an oil bath at 105°C for 6 hours, wash the wood 3 times with deionized water, then put the wood into deionized water for 12 hours, and then put it in -20 After pre-freezing at ℃ for 24h, freeze-drying for 13h to obtain delignified wood;

[0061] 1g TiO 2 and 5ml of deionized water and absolute ethanol into a 10ml centrifuge tube, centrifugally washed 3 times, and dried at 60°C in an oven, the TiO 2 Put it into a corundum crucible, heat it up to 830°C at a rate of 10°C / min under an argon atmosphere, and cool it to room temperature after 1.5 hours of reaction to obtain black TiO 2 ;

[0062] S2. Put 0.5g of the black TiO 2 put into 5 mL of absolute ethanol, ultrasonically dispersed for 25 min, and then drop-coated on the de-lignified wood in 3 times for modification, and dried in an oven at 60° C. to obtain the modified nat...

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Abstract

The invention belongs to the field of sewage treatment, and relates to a preparation method of a modified natural wood material and application of the modified natural wood material in sewage purification. The preparation method of the modified natural wood material comprises the following steps that S1, wood is put into a lignin removal solution, after heating reaction, the wood is subjected to washing, dipping and freeze drying treatment, and lignin-removed wood is obtained; the preparation method comprises the following steps: cleaning and drying TiO2, and heating under inert gas to obtain black TiO2; s2, ultrasonically dispersing the black TiO2 in a solvent, then coating the lignin-removed wood with the black TiO2, and drying the lignin-removed wood to obtain the modified natural wood material, wherein the natural wood material is American cork wood, and the crystal form of the black TiO2 is a mixed phase of a rutile phase and an anatase phase. The prepared modified natural wood material has good photo-thermal performance, the utilization rate of solar energy is high, pollutants in sewage can be efficiently removed, and the modified natural wood material has great significance in sewage purification and reuse technology development.

Description

technical field [0001] The invention belongs to the field of sewage treatment, and relates to a preparation method of a modified natural wood material and its application in sewage purification. Background technique [0002] Water pollution, population increase and frequent meteorological disasters have made the current shortage of freshwater resources worsening, especially in some arid or semi-arid regions, where alternative freshwater resources are more scarce. The regulation of water sources is used to alleviate the current crisis of shortage of fresh water resources. The production of recycled water follows the "closed-loop water environment cycle strategy", which can be used as one of the powerful means to alleviate the current shortage of freshwater resources. Domestic sewage has a wide range of sources, stable discharge, and easy collection. It is expected to be one of the important influent sources for reuse water production. Compared with the direct treatment and d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B27K3/02B27K5/00B27K3/52B27K3/36B27K3/20B27K3/12B27K3/16C02F1/04
CPCB27K3/02B27K5/001B27K3/52B27K3/36B27K3/20B27K3/12B27K3/16C02F1/048B27K2240/15C02F2209/08C02F2209/16C02F2209/20Y02W10/37
Inventor 路璐晁伟翔于永杰杨睿洁何欣月
Owner HARBIN INST OF TECH SHENZHEN GRADUATE SCHOOL
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