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Preparation method of cotton bast loaded nano-titanium dioxide and glycine betaine photocatalyst

A nano-titanium dioxide, photocatalyst technology, applied in chemical instruments and methods, physical/chemical process catalysts, organic compound/hydride/coordination complex catalysts, etc., can solve the problems of complex and difficult recycling process, and achieve high catalytic activity. , good stability, excellent mechanical stability effect

Inactive Publication Date: 2016-05-25
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] As a photocatalyst, nano-titanium dioxide has strong oxidation ability and the ability to absorb and degrade pollutants under ultraviolet light irradiation. Nano-titanium dioxide photocatalyst has the characteristics of high efficiency, wide catalytic range and effective removal of various organic pollutants. There are broad application prospects in the field of treatment and air purification. In the early research on titanium dioxide photocatalysis, most of them used its colloid and particle suspension system to degrade organic pollutants, but the recovery process is very complicated and difficult.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] (1) Cotton stalk skin pretreatment: Soak the cotton stalks in water at room temperature for 2-3 days, peel off the skin of the outer layer of the cotton stalks, wash with water, remove impurities, dry and then crush to obtain pretreated cotton stalk skins;

[0025] (2) Oxidized cotton stalks: In the reactor, add deionized water: 55mL, concentrated sulfuric acid: 15mL, pretreated cotton stalks: 14g, potassium permanganate: 3g, soak at room temperature for 1.5h, and then boil for 10min , after cooling, wash with deionized water until the filtrate is neutral, and dry to obtain oxidized cotton stalk bark;

[0026] (3) Aminated cotton stalk skin: In the reactor, add anhydrous ethanol: 81mL, γ-aminopropyltriethoxysilane: 26g, oxidized cotton stalk skin: 10g, keep the temperature at 65±3℃, Stirring and reflux reaction for 5 hours, after cooling, washing with deionized water until the filtrate is neutral, drying to obtain aminated cotton stalk skin;

[0027] (4) Diethyltriamin...

Embodiment 2

[0030] (1) Cotton stalk skin pretreatment: Soak the cotton stalks in water at room temperature for 2-3 days, peel off the skin of the outer layer of the cotton stalks, wash with water, remove impurities, dry and then crush to obtain pretreated cotton stalk skins;

[0031] (2) Oxidized cotton stalks: In the reactor, add deionized water: 50mL, concentrated sulfuric acid: 17mL, pretreated cotton stalks: 16g, potassium permanganate: 2g, soak at room temperature for 1h, and then boil for 10min. After cooling, wash with deionized water until the filtrate is neutral, and dry to obtain oxidized cotton stalk bark;

[0032] (3) Aminated cotton stalk skin: In the reactor, add anhydrous ethanol: 76mL, γ-aminopropyltriethoxysilane: 28g, oxidized cotton stalk skin: 12g, keep the temperature at 65±3℃, Stirring and reflux reaction for 4 hours, after cooling, washing with deionized water until the filtrate is neutral, drying to obtain aminated cotton stalk skin;

[0033] (4) Diethyltriaminepent...

Embodiment 3

[0036] (1) Cotton stalk skin pretreatment: Soak the cotton stalks in water at room temperature for 2-3 days, peel off the skin of the outer layer of the cotton stalks, wash with water, remove impurities, dry and then crush to obtain pretreated cotton stalk skins;

[0037] (2) Oxidized cotton stalks: In the reactor, add deionized water: 60mL, concentrated sulfuric acid: 13mL, pretreated cotton stalks: 11g, potassium permanganate: 4g, soak at room temperature for 2h, and then boil for 10min. After cooling, wash with deionized water until the filtrate is neutral, and dry to obtain oxidized cotton stalk bark;

[0038] (3) Aminated cotton stalk husk: In the reactor, add absolute ethanol: 86mL, γ-aminopropyltriethoxysilane: 24g, oxidized cotton stalk husk: 8g, keep the temperature at 65±3℃, Stirring and reflux reaction for 6 hours, after cooling, washing with deionized water until the filtrate is neutral, drying to obtain aminated cotton stalk skin;

[0039] (4) Diethyltriaminepent...

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Abstract

The invention discloses a preparation method of a cotton bast loaded nano-titanium dioxide and glycine betaine photocatalyst. The preparation method is characterized by comprising the steps that cotton bast is subjected to oxidation, amination and diethyl pentetic acidizing treatment to obtain diethyl pentetic acidized cotton bast; in a reactor, by mass, 70-78% of deionized water, 8-12% of titanium tetrachloride, 3-8% of glycine betaine and 8-12% of the diethyl pentetic acidized cotton bast are added into an ice-water bath, the sum of the mass percentages is 100%, soaking is performed for 12-14 h, washing through the deionized water is performed till a filtrate is neutral, drying is performed at 130 DEG C for 6-8 h, and the cotton bast loaded nano-titanium dioxide and glycine betaine photocatalyst is obtained. The photocatalyst has the advantages of being easy to prepare, good in stability, degradable, environmentally friendly and the like; the catalyst is easy to recycle, mild in reaction condition, high in catalytic activity, small in usage amount and the like.

Description

technical field [0001] The invention relates to the technical field of preparation of supported catalysts, in particular to a preparation method of cotton stalk husk loaded nano-titanium dioxide and betaine photocatalyst and its application in wastewater treatment. Background technique [0002] Straw fiber is a huge renewable natural polymer resource on the earth. From the perspective of sustainable utilization of resources and environmental protection, people place great expectations on the utilization of renewable straw fibers. In recent years, ecological problems and global warming have awakened the use of natural materials to produce green products and reduce CO 2 emission awareness. Utilizing straw fiber resources is a long-term development direction of environmental protection. [0003] my country is a large cotton-producing country in the world, with more than 500,000 hectares of cotton planted. Cotton stalk is the waste of cotton farmers after picking cotton, and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/38
CPCB01J27/24B01J31/38B01J35/39
Inventor 李慧芝魏琴李冬梅
Owner UNIV OF JINAN
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