Preparation method for graphene oxide-modified attapulgite composite adsorption material

A composite adsorption material and attapulgite technology, applied in chemical instruments and methods, adsorbed water/sewage treatment, other chemical processes, etc., can solve the problem that the composite adsorption material of graphene oxide and attapulgite has not been reported in the literature, etc. Achieve the effect of improved operability, good adsorption performance, and developed void structure

Inactive Publication Date: 2017-06-30
LANZHOU PETROCHEM COLLEGE OF VOCATIONAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

There are many reports on palygorskite clay adsorption treatment of wastewater, but there is no literature report on the composite adsorption material of graphene oxide and attapulgite

Method used

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  • Preparation method for graphene oxide-modified attapulgite composite adsorption material
  • Preparation method for graphene oxide-modified attapulgite composite adsorption material
  • Preparation method for graphene oxide-modified attapulgite composite adsorption material

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Experimental program
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Effect test

Embodiment 1

[0043] (1) Preparation of chitosan-modified attapulgite: Add 10 g of chitosan to a mixed solution of 200 mL 10% oxalic acid and 50 mL 1% acetic acid, stir slowly and heat to 50°C to dissolve it completely. 4% pale yellow viscous sol. Take 100 mL of the sol, dilute with 100 mL of deionized water, shake at 50° C. for 1 h, slowly add 50 g of attapulgite, and continue stirring for 5 h to obtain a chitosan-modified attapulgite suspension.

[0044](2) Preparation of graphene oxide suspension: Weigh 0.10 g of graphite oxide solid into a beaker, add 500 mL of deionized water to make the concentration of graphite oxide 0.2 mg / mL, and place the beaker in an ultrasonic cleaner (40KHz, 200W) Ultrasound for 2 hours to obtain a stable graphene oxide suspension with no visible particles;

[0045] (3) Preparation of graphene oxide-attapulgite functional material: Place the above graphene oxide suspension in an ultrasonic cleaner, slowly add 4.0mL of chitosan attapulgite suspension while ultr...

Embodiment 2

[0048] (1) Preparation of cetyltrimethylammonium bromide-modified attapulgite: Add 5 g of attapulgite to 50 mL of deionized water, and stir thoroughly to obtain attapulgite suspension; adjust the temperature of attapulgite suspension to 70°C , adding 0.25 g of cetyltrimethylammonium bromide, and stirring for 3 hours to obtain a cetyltrimethylammonium bromide-modified attapulgite suspension.

[0049] (2) Preparation of graphene oxide suspension: Weigh 0.2g of graphite oxide solid into a beaker, add 500mL of deionized water to make the concentration of graphite oxide 0.4mg / mL, place the beaker in an ultrasonic cleaner (40KHz, 200W ) for 3 hours of ultrasonication to obtain a stable graphene oxide suspension with no visible particles;

[0050] (3) Preparation of graphene oxide-attapulgite functional material: put the above graphene oxide suspension in an ultrasonic cleaner, and slowly add 20.0 mL of the above cetyltrimethylammonium bromide modified Attapulgite suspension, fully ...

Embodiment 3

[0053] (1) Preparation of tetrabutylammonium bromide-modified attapulgite: add 20 g of attapulgite to 200 mL of deionized water, and shake at a constant temperature (150 r / min) at 60 °C for 2 h to obtain attapulgite suspension; then add 0.83 g tetrabutylammonium bromide, and stirred for 2 hours to obtain tetrabutylammonium bromide-modified attapulgite suspension.

[0054] (2) Preparation of graphene oxide suspension: Weigh 0.15g of graphite oxide solid into a beaker, add 500mL of deionized water to make the concentration of graphite oxide 0.3mg / mL, place the beaker in an ultrasonic cleaner (40KHz, 200W ) for 2 hours of ultrasonication to obtain a stable graphene oxide suspension with no visible particles;

[0055] (3) Preparation of graphene oxide-attapulgite functional material material: put the above graphene oxide suspension in an ultrasonic cleaner, and slowly add 5.0 mL of tetrabutylammonium bromide-modified attapulgite suspension while ultrasonicating, Stir fully (300 r...

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Abstract

The invention provides a preparation method for a graphene oxide-organic ammonium salt modified attapulgite composite adsorption material. The preparation method comprises the following steps: separately preparing a suspension of graphene oxide and a suspension of organic ammonium salt modified attapulgite, mixing the suspensions, and carrying out a continuous stirring reaction under ultrasonic conditions for 1 to 4 h so as to obtain a uniform stable brown suspended solid; and washing the brown suspended solid with water, then carrying out pumping filtration, drying a filter cake in a vacuum drying box to a constant weight and carrying out grinding so as to obtain the graphene oxide-organic ammonium salt modified attapulgite composite adsorption material. The graphene oxide-organic ammonium salt modified attapulgite composite adsorption material prepared by the invention has a large specific surface area and a prosperous void structure, overcomes the problem of proneness to agglomeration or difficulty in separation from an aqueous solution in preparation and application of graphene oxide, effectively improves the operability of graphene oxide in practical application, presents good adsorption performance on dyes, heavy metals and the like in waste water, and can be used for sewage treatment.

Description

technical field [0001] The invention relates to a preparation method of a composite adsorption material, in particular to a preparation method of a graphene oxide-organic ammonium salt modified attapulgite composite adsorption material, which is mainly used for the treatment of dye wastewater and belongs to the technical field of composite materials and Water treatment technology field. Background technique [0002] Graphene, with its huge theoretical specific surface area, is a well-performing adsorbent for adsorbing pollutants in wastewater. However, the van der Waals force can be generated through the interaction of π electrons between graphene sheets, and the hydrophobicity of graphene itself makes graphene irreversible stacking during the preparation process, resulting in the specific surface area of ​​graphene being much lower than its theoretical ratio. Surface area, adsorption performance decreased. The surface of graphene oxide is grafted with many oxygen-containi...

Claims

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Application Information

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IPC IPC(8): B01J20/24B01J20/22B01J20/30C02F1/28C02F101/22C02F101/20C02F101/30
CPCB01J20/12B01J20/20B01J20/22B01J20/24B01J2220/4806B01J2220/4812B01J2220/4825C02F1/28C02F1/281C02F1/285C02F1/286C02F2101/20C02F2101/22C02F2101/308
Inventor 夏德强本莲芳呼小洲田红尚秀丽胡甫嵩吕维华贾少超郑晓明
Owner LANZHOU PETROCHEM COLLEGE OF VOCATIONAL TECH
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