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Tannic acid modified graphene/gelatin porous composite material and preparation method and application thereof

A porous composite material, tannic acid technology, applied in chemical instruments and methods, alkali metal compounds, other chemical processes, etc., can solve the problem of limited adsorption capacity of organic dyes, achieve good adsorption effect, enhance adsorption capacity, and excellent adsorption. performance effect

Active Publication Date: 2018-12-25
HENAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the graphene oxide porous composite material has limited adsorption capacity for organic dyes.

Method used

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  • Tannic acid modified graphene/gelatin porous composite material and preparation method and application thereof
  • Tannic acid modified graphene/gelatin porous composite material and preparation method and application thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] The preparation method of the tannic acid modified graphene / gelatin porous composite material of the present embodiment comprises the following steps:

[0043] 1) Mix 500mg of tannic acid with 500mL of graphene oxide aqueous solution (containing 50mg of GO), react at 80°C for 4h, and then filter through membrane to remove unreacted tannic acid to obtain tannic acid-modified graphene ;

[0044] 2) Put 5g of gelatin in 20mL of distilled water and heat to 50°C to dissolve all the gelatin to obtain a gelatin solution;

[0045] 3) tannic acid modified graphene is evenly dispersed in deionized water, then dropped into the gelatin solution with a dropping funnel, stirred and mixed evenly to obtain a tannic acid modified graphene / gelatin mixed solution;

[0046] 4) Drop the tannic acid-modified graphene / gelatin mixed solution into ice water at a rate of 5 drops / min using a syringe to obtain tannic acid-modified graphene / gelatin microspheres;

[0047] 5) Immerse tannic acid-mo...

Embodiment 2

[0049] The preparation method of the tannic acid modified graphene / gelatin porous composite material of the present embodiment comprises the following steps:

[0050] 1) Mix 100 mg of tannic acid with 300 mL of graphene oxide aqueous solution (containing 100 mg GO), react at 90° C. for 6 hours, and then filter through a membrane to remove unreacted tannic acid to obtain tannic acid-modified graphene;

[0051]2) Put 6g of gelatin in 20mL of distilled water and heat to 50°C to dissolve all the gelatin to obtain a gelatin solution;

[0052] 3) tannic acid modified graphene is evenly dispersed in deionized water, then dropped into the gelatin solution with a dropping funnel, stirred and mixed evenly to obtain a tannic acid modified graphene / gelatin mixed solution;

[0053] 4) Drop the tannic acid-modified graphene / gelatin mixed solution into ice water at a rate of 10 drops / min using a syringe to obtain tannic acid-modified graphene / gelatin microspheres;

[0054] 5) Immerse the ta...

Embodiment 3

[0056] The preparation method of the tannic acid modified graphene / gelatin porous composite material of the present embodiment comprises the following steps:

[0057] 1) Mix 200 mg of tannic acid with 300 mL of graphene oxide aqueous solution (containing 100 mg GO), react at 85° C. for 8 hours, and then filter through a membrane to remove unreacted tannic acid to obtain tannic acid-modified graphene;

[0058] 2) Put 4g of gelatin in 20mL of distilled water and heat to 60°C to dissolve all the gelatin to obtain a gelatin solution;

[0059] 3) tannic acid modified graphene is evenly dispersed in deionized water, then added to the gelatin solution with a dropping funnel, stirred and mixed evenly to obtain a tannic acid modified graphene / gelatin mixed solution;

[0060] 4) Drop the tannic acid modified graphene / gelatin mixed solution into ice water at a rate of 15 drops / min using a metering pump to obtain tannic acid modified graphene / gelatin microspheres;

[0061] 5) Immerse the...

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Abstract

The invention belongs to the technical field of dye adsorbents and relates to a tannic acid modified graphene / gelatin porous composite material and a preparation method and application thereof. The preparation method includes the steps of 1), mixing tannic acid, oxidized graphene and deionized water for reaction at the temperature of 80-90DEG C, and then performing solid-liquid separation to obtain tannic acid modified graphene; 2), mixing the tannic acid modified graphene, gelatin and the deionized water to obtain a tannic acid modified graphene / gelatin mixture; 3), dropping the tannic acid modified graphene / gelatin mixture into ice water to obtain tannic acid modified graphene / gelatin microspheres; 4), subjecting the tannic acid modified graphene / gelatin microspheres and a cross-linkingagent to cross-linking reaction to obtain the tannic acid modified graphene / gelatin porous composite material after freeze drying. The tannic acid modified graphene / gelatin porous composite material has good adsorption effect on organic dyes.

Description

technical field [0001] The invention belongs to the technical field of dye adsorption materials, and specifically relates to a tannic acid modified graphene / gelatin porous composite material, and also relates to a preparation method of the tannic acid modified graphene / gelatin porous composite material and its use as a dye adsorption material. application of materials. Background technique [0002] In recent years, my country's dye chemical industry has developed rapidly and has become one of the world's largest dye production, consumption and trade countries. As a kind of chemical raw material, dyes are widely used in textile, printing, leather and other industries, and become one of the main sources of water pollution, and the discharge is increasing year by year. Because dyes have a strong toxic effect on the human body, obvious water pollution, and are difficult to degrade in the natural environment, dye pollution has become a major problem that needs to be solved urgen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/24B01J20/28C02F1/28C02F101/30
CPCB01J20/20B01J20/24B01J20/28019B01J20/28047C02F1/283C02F1/286C02F2101/308
Inventor 刘翠云刘红宇熊天辉李远航皱昭翔景蓓蓓建方方
Owner HENAN UNIV OF SCI & TECH