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Magnetic response graphene oxide/plant fiber adsorption material and its preparation method and application

A plant fiber and adsorption material technology, applied in the direction of alkali metal oxides/hydroxides, chemical instruments and methods, alkali metal compounds, etc., can solve problems such as inability to meet low-concentration adsorption, low removal rate, and complicated preparation process. Achieve the effects of harsh reaction conditions, improved utilization efficiency, and more preparation steps

Active Publication Date: 2020-12-18
GUANGXI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Sun et al. first embedded Fe in cellulose 3 o 4 @SiO 2 particles, prepared magnetic cellulose microspheres, and then used GMA as a cross-linking agent and ethylenediamine as a grafting monomer to carry out amino graft modification on magnetic cellulose microspheres, and prepared magnetic cellulose-based nanoparticles rich in amino groups. Microspheres, the material has a maximum adsorption capacity of 171.5 mg / g for Cr(VI), and can reach adsorption equilibrium within 10 minutes, but its removal rate is low, which cannot meet the requirements of low-concentration adsorption.
However, the preparation process of cellulose-based adsorbent materials reported so far is relatively complicated, and it is difficult to meet the requirements of convenient recycling, high-efficiency adsorption performance and good regeneration performance at the same time.

Method used

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  • Magnetic response graphene oxide/plant fiber adsorption material and its preparation method and application
  • Magnetic response graphene oxide/plant fiber adsorption material and its preparation method and application
  • Magnetic response graphene oxide/plant fiber adsorption material and its preparation method and application

Examples

Experimental program
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Effect test

Embodiment 1

[0035] Example 1 Preparation of Magnetically Responsive Graphene Oxide / Plant Fiber Adsorbent Material

[0036] ① Preparation of xanthanized plant fiber: first weigh 5g of dry bagasse fiber into a 250mL three-necked flask, add 50mL of NaOH solution with a mass fraction of 14%, stir until the bagasse fiber is completely dispersed and evenly, then add 27mL of CS 2 Ethanol solution (volume ratio is 1:8), after reacting for 2h, add 25mL of MgSO with a mass fraction of 10% 4 Solution, react for 1h, filter, and successively use 50mL of MgSO with a mass fraction of 5% 4 solution and 50 mL of ethanol for soaking and washing, and finally washing with deionized water until the filtrate is neutral, and then freeze-drying to constant weight to obtain xanthated bagasse fiber.

[0037] ②Modified ferrofluid Fe 3 o 4 Preparation: Weigh 90g FeCl 3 ·6H 2 O and 48g FeSO 4 ·7H 2 O was added to a 500mL three-necked flask, and 100mL of deionized water was added, stirred in a water bath at 75°...

Embodiment 2

[0041] Example 2 Preparation of Magnetically Responsive Graphene Oxide / Plant Fiber Adsorbent Material

[0042] ① Preparation of xanthanized plant fiber: First weigh 5g of dry sisal fiber into a 250mL three-neck flask, add 45mL of NaOH solution with a mass fraction of 10%, stir until the sisal fiber is completely dispersed and evenly, then add 6mL drop by drop CS 2 Ethanol solution (volume ratio is 1:5), after reacting for 1h, add 20mL of MgSO with a mass fraction of 5% 4 solution, reacted for 0.5h, filtered, followed by 50mL mass fraction of 5% MgSO 4 solution and 50 mL of ethanol for soaking and washing, and finally washing with deionized water until the filtrate is neutral, and then freeze-drying to constant weight to obtain xanthated sisal fiber.

[0043] ②Modified ferrofluid Fe 3 o 4 Preparation: Weigh 90g FeCl 3 ·6H 2 O and 45g FeSO 4 ·7H 2 Add 100 mL of deionized water to a 500 mL three-neck flask, stir in a water bath at 70°C until dissolved, and then quickly ad...

Embodiment 3

[0047] Example 3 Preparation of Magnetically Responsive Graphene Oxide / Plant Fiber Adsorbent Material

[0048] ① Preparation of xanthified plant fiber: first weigh 5g of dry bamboo shoot shell fiber into a 250mL three-neck flask, add 55mL of NaOH solution with a mass fraction of 20%, stir until the bamboo shoot shell fiber is completely dispersed, and then add 55mL of it drop by drop CS 2 Ethanol solution (volume ratio is 1:10), after reacting for 3h, add 30mL mass fraction of 15% (NH4 ) 2 SO 4 solution, reacted for 1.5h, filtered, followed by 50mL mass fraction of 5% (NH 4 ) 2 SO 4 solution and 50 mL of ethanol for soaking and washing, and finally washing with deionized water until the filtrate is neutral, and then freeze-drying to constant weight to obtain xanthified bamboo shoot shell fiber.

[0049] ②Modified ferrofluid Fe 3 o 4 Preparation: Weigh 90g FeCl 3 ·6H 2 O and 50g FeSO 4 ·7H 2 Add 100 mL of deionized water to a 500 mL three-neck flask, stir in a water ...

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Abstract

The invention discloses a magnetic response graphene oxide / plant fiber adsorption material as well as a preparation method and the application thereof. The preparation method comprises the following steps: by taking a xangthogenated plant fiber as a substrate, a modified magnetic fluid Fe3O4 as a magnetic response reagent, and hyperbranched polyamine as a functional reagent, carrying out one-stepcross-linking compounding on the xangthogenated plant fiber, the modified magnetic fluid Fe3O4 and the hyperbranched polyamine / graphene oxide compound by using a cross-linking agent, so as to obtain the magnetic response graphene oxide / plant fiber adsorption material. The material disclosed by the invention has good properties in the field of heavy metal adsorption, that is, the material has an adsorption capacity of 800mg / g or greater upon heavy metal ions, has a removal rate up to 100%, is good in stability, has a regeneration rate greater than 96% even after 50 times of regeneration, and meanwhile is convenient to regenerate and recycle.

Description

technical field [0001] The invention belongs to the field of fiber material modification, and in particular relates to a magnetically responsive graphene oxide / plant fiber adsorption material and a preparation method and application thereof. Background technique [0002] Excessive levels of heavy metal ions in water are harmful to the environment and organisms, and are also one of the most difficult water pollution. Using conventional biological methods, chemical precipitation methods, membrane filtration methods, electrolysis methods, etc., it is difficult to directly meet the discharge standards or drinking standards, especially the treatment of low-concentration heavy metal ion wastewater often requires greater human and financial costs. Due to the advantages of simple operation, wide source of raw materials, and high plasticity, the adsorption method has gradually attracted widespread attention in the field of heavy metal ion wastewater treatment. However, most of the h...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/26B01J20/28B01J20/30C02F1/28C02F101/20
CPCB01J20/06B01J20/20B01J20/24B01J20/262B01J20/28009C02F1/288C02F2101/20
Inventor 何辉李云华唐汉颖谢鸿王磊朱红祥
Owner GUANGXI UNIV
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