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Wood-based composite material for photo-thermal purification of sewage as well as preparation method and application of wood-based composite material

A composite material and photothermal technology, applied in chemical instruments and methods, wood impregnation, wood treatment, etc., can solve the problems of inability to obtain natural liquid water, improve hydrophilicity and light absorption characteristics, accelerate transmission and evaporation, Ease of mass production

Active Publication Date: 2021-12-21
NANJING FORESTRY UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, most of the areas suffering from water stress are landlocked and arid areas without access to natural liquid water, on the other hand, moisture and water droplets in the air cannot fully meet the needs of people in arid areas

Method used

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  • Wood-based composite material for photo-thermal purification of sewage as well as preparation method and application of wood-based composite material
  • Wood-based composite material for photo-thermal purification of sewage as well as preparation method and application of wood-based composite material
  • Wood-based composite material for photo-thermal purification of sewage as well as preparation method and application of wood-based composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A method for preparing a wood-based composite material for photothermal purification of sewage, comprising the following steps:

[0033] (1) Add 9.5g of sodium chloroacetate and 1.2g of sodium hydroxide into 70mL of deionized water and stir evenly, put in balsa wood with a size of 1*1*0.5cm, and heat in a water bath at 80°C for 1h in a reaction kettle. Then take out the wood and put it into deionized water to stir and wash for 24 hours. After cleaning, use a pH meter to compare the pH of the cleaned solution with that of pure water. Carboxylation treated wood for later use;

[0034] (2) Dissolve 9.52g (0.032mol, 4 concentration) zinc nitrate hexahydrate in 20g methanol and 3g deionized water, stir evenly, put the dry wood after the carboxylation treatment into the above solution and place it in a closed container. After vacuum pumping, vacuum impregnation for 1-2h. Subsequently, 13.4g (0.16mol, 4 concentrations) of 2-methylimidazole (2-MeIm) was dissolved in 20g of me...

Embodiment 2

[0039] A method for preparing a wood-based composite material for photothermal purification of sewage, comprising the following steps:

[0040] (1) Add 9.5g of sodium chloroacetate and 1.2g of sodium hydroxide into 70mL of deionized water and stir evenly, put in fir trees with a size of 1*1*0.5cm, and heat in a water bath at 80°C for 1h in a reaction kettle. Then take out the wood and put it into deionized water to stir and wash for 24 hours. After cleaning, use a pH meter to compare the pH of the cleaned solution with that of pure water. Carboxylation treated wood for later use;

[0041] (2) Dissolve 7.15g (0.024mol, 3 concentration) zinc nitrate hexahydrate in 20g methanol and 3g deionized water, stir well, put the dry wood after the carboxylation treatment into the above solution and place it in a closed container. After vacuum pumping, vacuum impregnation for 1-2h. Subsequently, 10.1g (0.12mol, 3 concentrations) of 2-methylimidazole (2-MeIm) was dissolved in 20g of metha...

Embodiment 3

[0045] A method for preparing a wood-based composite material for photothermal purification of sewage, comprising the following steps:

[0046] (1) Add 9.5g of sodium chloroacetate and 1.2g of sodium hydroxide into 70mL of deionized water and stir evenly, put in balsa wood with a size of 1*1*0.5cm, and heat in a water bath at 80°C for 1h in a reaction kettle. Then take out the wood and put it into deionized water to stir and wash for 24 hours. After cleaning, use a pH meter to compare the pH of the cleaned solution with that of pure water. Carboxylation treated wood, denoted as B+S;

[0047] (2) Dissolve 2.38g (0.008mol, 1 concentration) zinc nitrate hexahydrate in 20g methanol and 3g deionized water, stir evenly, put the dry wood after the carboxylation treatment into the above solution and place it in a closed container. After vacuum pumping, vacuum impregnation for 1-2h. Subsequently, 3.35g (0.04mol, 1 concentration) of 2-methylimidazole (2-MeIm) was dissolved in 20g of m...

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Abstract

The invention discloses a wood-based composite material for photo-thermal purification of sewage as well as a preparation method and application of the wood-based composite material, and belongs to the technical field of photo-thermal conversion. According to the method, after wood is subjected to vacuum impregnation through an MOF precursor solution, a metal organic framework material grows in wood pore channels, and the wood-based composite material for photo-thermal evaporation and heavy metal ion removal is prepared. The polydopamine photo-thermal material in the composite material can convert a solar spectrum into heat energy, so that purified water evaporation is efficiently carried out; the wood substrate can effectively reduce heat conduction loss, heat concentration is achieved, and the photo-thermal conversion efficiency is improved; in addition, the hydrophobic property of the wood accelerates the transmission and evaporation of water; the porous MOF nano material can adsorb pollutant ions. The aim of removing ions in the sewage is fulfilled. The composite material provided by the invention is low in preparation raw material cost, simple and convenient in process, high in repeatability and easy for large-scale production, and has a wide application prospect in multidisciplinary crossing fields such as seawater desalination and sewage purification.

Description

technical field [0001] The invention belongs to the technical field of photothermal conversion, and in particular relates to a wood-based composite material used for photothermal purification of sewage, a preparation method and application thereof. Background technique [0002] Freshwater scarcity is one of the major challenges facing the world. To solve the world's water shortage problem, researchers have developed many water harvesting technologies, including seawater desalination and rainwater harvesting. However, most of the areas suffering from water stress are landlocked and arid areas without access to natural liquid water, on the other hand, the moisture and water droplets in the air cannot fully meet the needs of people in arid areas. In recent years, technologies related to solar thermal conversion have received extensive attention for economical and sustainable water harvesting and purification. The solar photothermal interface evaporation technology uses clean s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B27K3/08B27K3/52B27K3/36B27K3/20B27K3/22B27K3/34B27K3/02C02F1/14C02F1/28
CPCB27K3/08B27K3/52B27K3/36B27K3/20B27K3/22B27K3/343B27K3/025C02F1/14C02F1/285C08G83/008B27K2240/15Y02A20/124Y02A20/142Y02A20/212
Inventor 陆依沈子怡范德琪张昊丁明烨杨小飞
Owner NANJING FORESTRY UNIV
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