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Preparation method of nano titanium dioxide and betaine photocatalyst loaded on cotton stalk husk

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 recovery process, and achieve high catalytic activity. , Efficiency improvement, simple use effect

Inactive Publication Date: 2017-09-22
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: 55 mL, concentrated sulfuric acid: 15 mL, pretreated cotton stalks: 14 g, potassium permanganate: 3 g, soak at room temperature for 1.5 h, and then Boil for 10 min, after cooling, wash with deionized water until the filtrate is neutral, and dry to obtain oxidized cotton stalk skin;

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

[0027] (4) Dieth...

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: 50 mL, concentrated sulfuric acid: 17 mL, pretreated cotton stalks: 16 g, potassium permanganate: 2 g, soak at room temperature for 1 hour, and then boil After cooling for 10 min, 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: 76 mL, γ-aminopropyltriethoxysilane: 28 g, oxidized cotton stalk skin: 12 g, keep the temperature at 65±3℃ , stirring, and reflux reaction for 4 h, after cooling, wash with deionized water until the filtrate is neutral, and dry to obtain aminated cotton stalk skin;

[0033] (4) Diethyltria...

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: 60 mL, concentrated sulfuric acid: 13 mL, pretreated cotton stalks: 11 g, potassium permanganate: 4 g, soak at room temperature for 2 h, and then Boil for 10 min, after cooling, wash with deionized water until the filtrate is neutral, and dry to obtain oxidized cotton stalk skin;

[0038] (3) Aminated cotton stalk skin: In the reactor, add anhydrous ethanol: 86 mL, γ-aminopropyltriethoxysilane: 24 g, oxidized cotton stalk skin: 8 g, and keep the temperature at 65±3°C , stirring, and reflux reaction for 6 h, after cooling, wash with deionized water until the filtrate is neutral, and dry to obtain aminated cotton stalk skin;

[0039] (4) Diethylt...

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Abstract

The invention discloses a preparation method of nano-titanium dioxide and betaine photocatalyst loaded on cotton stalk bark. Triamine pentaacetic acidified cotton stalk bark negative; then, in the reactor, in the ice-water bath, add according to the following composition mass percentage, deionized water: 70~78%, titanium tetrachloride: 8~12%, betaine : 3~8%, diethyltriaminepentaacetic acidified cotton stalk skin: 8~12%, the sum of each component is 100%, soak for 12~14h, wash with deionized water, until the filtrate is neutral, in Dry at 130°C for 6-8 hours to obtain nano-titanium dioxide and betaine photocatalysts loaded on cotton stalk husk. The invention has the characteristics of simple preparation method, good stability, degradability and environmental friendliness; the catalyst is easy to recycle, the reaction condition is mild, the catalytic activity is high, and the dosage is small.

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 protection of the environment, 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 cotto...

Claims

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Application Information

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Patent Type & Authority Patents(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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