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Preparation method and application of cotton stalk bast fiber loaded nano gold catalyst

A technology of cotton stalk husk and nano-gold, which is applied in chemical instruments and methods, physical/chemical process catalysts, separation methods, etc., can solve the problems of low adsorption capacity and large pH influence, and achieve high catalytic activity, easy separation, and particle evenly dispersed effect

Inactive Publication Date: 2014-07-16
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

He used nitrogen-containing chelating agents to chemically modify cotton stalks and adsorb metal ions in the water system. The pH has a relatively large impact and the adsorption capacity is also low.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] (1) Cotton stalk skin pretreatment: soak cotton stalks in water at room temperature for 1-3 days, peel, wash, remove impurities, dry, and then crush them to form soft cotton wool;

[0017] (2) Preparation of degummed cotton stalk husk fibers: soak the crushed cotton stalk husks at 35% of the total mass with 0.3mol / L urea solution and 1% hydrogen peroxide mixed solution at room temperature for 30min, wash with water and use 0.1mol / L of H 2 SO 4 Immerse in the solution for 2 minutes; boil with a concentration of 0.4mol / L NaOH solution for 60 minutes, add distilled water continuously during the boiling period to keep the volume of the solution constant, wash with deionized water to neutral after cooling, and dry at 60°C after suction filtration to obtain Degummed cotton stalk fiber.

[0018] (3) Preparation of mercapto cotton stalk fiber: In a stoppered Erlenmeyer flask, add 28 mL of thioglycolic acid (filter out precipitate) and 25 mL of tetrahydrofuran, add 2 mL of ac...

Embodiment 2

[0021] (1) Cotton stalk skin pretreatment: soak cotton stalks in water at room temperature for 1-3 days, peel, wash, remove impurities, dry, and then crush them to form soft cotton wool;

[0022] (2) Preparation of degummed cotton stalk husk fibers: soak the crushed cotton stalk husks at 30% of the total mass with 0.4mol / L urea solution and 2% hydrogen peroxide mixed solution at room temperature for 40min, wash with water and use 0.1mol / L of H 2 SO 4Immerse in the solution for 5 minutes; boil with a concentration of 0.4mol / L NaOH solution for 60 minutes, add distilled water continuously during the boiling period to keep the volume of the solution constant, wash with deionized water to neutral after cooling, and dry at 60°C after suction filtration to obtain Degummed cotton stalk fiber.

[0023] (3) Preparation of mercapto cotton stalk fiber: In a stoppered Erlenmeyer flask, add 35 mL of thioglycolic acid (filter out the precipitate) and 25 mL of tetrahydrofuran, add 4 mL of...

Embodiment 3

[0026] (1) Cotton stalk skin pretreatment: soak cotton stalks in water at room temperature for 1-3 days, peel, wash, remove impurities, dry, and then crush them to form soft cotton wool;

[0027] (2) Preparation of degummed cotton stalk husk fibers: soak the crushed cotton stalk husks at 35% of the total mass with 0.5mol / L urea solution and 1% hydrogen peroxide mixed solution at room temperature for 50min, wash with water and use 0.1mol / L of H 2 SO 4 Immerse in the solution for 4 minutes; boil with a concentration of 0.5mol / L NaOH solution for 70 minutes, add distilled water continuously during the boiling period to keep the solution volume constant, wash with deionized water to neutral after cooling, and dry at 70°C after suction filtration to obtain Degummed cotton stalk fiber.

[0028] (3) Preparation of mercapto cotton stalk fiber: In a stoppered Erlenmeyer flask, add 30 mL of thioglycolic acid (filter out the precipitate) and 35 mL of tetrahydrofuran, add 3 mL of aceti...

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Abstract

The invention discloses a preparation method and application of cotton stalk bast fiber loaded nano gold catalyst. The preparation method includes the steps of firstly, purifying, washing and degumming the cotton stalk bast fibers; secondly, adding mercaptoacetic acid, tetrahydrofuran, acetic anhydride, the degummed cotton stalk bast fibers, and concentrated sulfuric acid according to mass percent, and allowing for reaction to obtain sulfydryl cotton stalk bast fibers; thirdly, adding the sulfydryl cotton stalk bast fibers into chloroauric acid solution, reacting under acid conditions, separating to obtain solid, reducing the solid with NaBH4, separating, washing with distilled water, and drying to obtain the cotton stalk bast fiber loaded nano gold catalyst. The preparation method is simple, gold particles spread evenly and are high in load rate, and the cotton stalk bast fibers are light, low in price, fine in stability, degradable, environment-friendly and the like. The catalyst is applicable to a CO removing device of an antigas mask, indoor air purification and the like at room temperature. The catalyst is mild in reaction condition and environment-friendly.

Description

technical field [0001] The invention relates to the technical field of preparation of supported catalysts, in particular to a method for preparing a nano-gold catalyst supported by cotton stalk husk fibers and its application in catalytic CO oxidation at room temperature. Background technique [0002] 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 cotton stalk bark is a kind of excellent bast growing on the surface of cotton stalk. The cotton stalk produced per hectare is about 4000kg, and the cotton stalk skin accounts for about 26%. Rich. As agricultural waste, cotton stalks are mostly burned as fuel in rural areas, and the rest cannot be used and turned into waste, which is a pity. Making full use of these can create considerable economic benefits. We use cotton husk cellulose to synthesize a new adsorbent for the adsorption of heavy me...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J31/06B01D53/86B01D53/62
CPCY02A50/20
Inventor 许崇娟李慧芝戚玉华庄海燕卢燕
Owner UNIV OF JINAN
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