Preparation method of graphene modified hydrophobic activated carbon

A graphene modification, activated carbon technology, applied in separation methods, chemical instruments and methods, climate sustainability, etc., can solve problems such as reduced adsorption capacity, and achieve the effect of increasing hydrophobicity and ensuring regeneration

Active Publication Date: 2019-03-12
ZHONGSHAN FLASHLIGHT POLYTECHNIC
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] Activated carbon plays a very important role in the treatment of volatile organic gases (VOCs) and other environmental pollutants due to its developed pore structure and huge specific surface area, but there are still some difficult problems in the application
Ordinary activated carbon will produce some hydrophilic groups on the surface of activated carbon during the activation process, resulting in a certain degree of hydrophilicity of activated carbon, which will lead to the adsorption of organic pollutants such as VOCs by activated carbon in a humid environment greatly reduced capacity

Method used

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  • Preparation method of graphene modified hydrophobic activated carbon

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Effect test

Embodiment 1

[0019] A preparation method of graphene-modified hydrophobic activated carbon, comprising the following steps:

[0020] S1. Clean the hard fruit shells, dry them, pulverize them with a pulverizer, and sieve them to obtain fruit shell powders with a mesh size below 200; the hard fruit shells include coconut shells, apricot core shells, walnut shells, and peach shells.

[0021] S2, take by weighing 100 grams of fruit shell powder and 350 mL of ZnCl with a concentration of 0.3 g / mL 2 -HCl solution is mixed evenly, add 30 grams of graphene, and add 20mL self-made dispersant simultaneously, described self-made dispersant is polyvinylpyrrolidone (PVP) and sodium lignosulfonate (SLS) mixed solution, and concentration is 5g / L, The mass ratio of polyvinylpyrrolidone and sodium lignin sulfonate in the mixed solution is 4:1; Ultrasound in an ultrasonic instrument for 30-60min, so that the graphene and the husk powder are evenly mixed and dispersed in the solution, and then mixed The sol...

Embodiment 2

[0025] A preparation method of graphene-modified hydrophobic activated carbon, comprising the following steps:

[0026] S1. Clean the hard fruit shells, dry them, pulverize them with a pulverizer, and sieve them to obtain fruit shell powders with a mesh size below 200; the hard fruit shells include coconut shells, apricot core shells, walnut shells, and peach shells.

[0027] S2, take by weighing 100 grams of fruit shell powder and 600 mL of ZnCl with a concentration of 0.5 g / mL 2 -HCl solution is mixed evenly, adds 20 grams of graphene, and adds 20mL self-made dispersant simultaneously, and described self-made dispersant is the mixed solution of PVP and sodium lignosulfonate (SLS), and concentration is 5g / L, and the polymer in the mixed solution The mass ratio of vinylpyrrolidone and sodium lignosulfonate is 4:3; Ultrasonic 30-60min in ultrasonic instrument, makes graphene and fruit shell powder mix evenly and evenly disperse in solution, then mix solution in 60-80 The react...

Embodiment 3

[0031] A preparation method of graphene-modified hydrophobic activated carbon, comprising the following steps:

[0032] S1. Clean the hard fruit shells, dry them, pulverize them with a pulverizer, and sieve them to obtain fruit shell powders with a mesh size below 200; the hard fruit shells include coconut shells, apricot core shells, walnut shells, and peach shells.

[0033] S2, take by weighing 100 grams of fruit shell powder and 1000 mL concentration of ZnCl of 0.2 g / mL 2 -HCl solution is mixed evenly, adds 10 grams of graphene, and adds 10mL self-made dispersant simultaneously, and described self-made dispersant is the mixed solution of PVP and sodium lignosulfonate (SLS), and concentration is 5g / L, and the polymer in the mixed solution The mass ratio of vinylpyrrolidone and sodium lignosulfonate is 4:2; Ultrasonic 30-60min in ultrasonic instrument, makes graphene and fruit shell powder mix evenly and evenly disperse in solution, then mix solution in 60-80 The reaction wa...

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Abstract

The invention provides a preparation method of graphene modified hydrophobic activated carbon. The method comprises the following steps: uniformly mixing shell powder with a ZnCl2-HCl solution; addinggraphene and a home-made dispersing agent at the same time, wherein the home-made dispersing agent is a mixed aqueous solution of polyvinylpyrrolidone and sodium lignosulfonate, and carrying out ultrasonic treatment for 30-60min in an ultrasonic apparatus so as to enable the graphene and the shell powder to be uniformly mixed and evenly dispersed in the solution; carrying out a reaction, drying,then grinding, tabletting, and carbonizing; after the carbonization is finished, cooling to the room temperature, washing the sample for a plurality of times with distilled water until the product isneutral, and drying to obtain the graphene modified hydrophobic activated carbon. The graphene modified hydrophobic activated carbon prepared by the method is low in water absorption, and the heat conductivity coefficient of the graphene modified hydrophobic activated carbon is 3-5 times of that of the common commercial activated carbon.

Description

technical field [0001] The invention relates to a preparation method of graphene-modified hydrophobic activated carbon. Background technique [0002] Activated carbon plays an important role in the treatment of volatile organic gases (VOCs) and other environmental pollutants due to its well-developed pore structure and large specific surface area, but there are still some difficult problems in its application. Ordinary activated carbon will produce some hydrophilic groups on the surface of activated carbon during the activation process, resulting in a certain degree of hydrophilicity of activated carbon, which will lead to the adsorption of organic pollutants such as VOCs by activated carbon in a humid environment ability is greatly reduced. Therefore, appropriately improving the hydrophobicity of activated carbon is of great significance to increase the application range of activated carbon. Contents of the invention [0003] The object of the present invention is to pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/348C01B32/324C01B32/354B01J20/20B01J20/30B01D53/02
CPCB01D53/02B01J20/20C01B32/324C01B32/348C01B32/354B01D2257/708Y02P20/10
Inventor 谷雪贤黄勇
Owner ZHONGSHAN FLASHLIGHT POLYTECHNIC
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