Synthesis method of sulfur-doped reduced graphene used for adsorbing organic pollutants

A technology of organic pollutants and synthesis methods, which is applied in the field of synthesis of sulfur-doped reduced graphene, can solve problems such as unfavorable environmental safety and human health, increase production costs, and complicated processes, and achieve low production costs, mild conditions, and easy preparation The effect of simple process

Inactive Publication Date: 2017-07-25
肖硕 +2
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

These preparation methods are not only complicated in process, harsh in conditions, and time-consuming, but also use a large amount of toxic and harmful chemical reagents in the preparation process, which not only increases the production cost, but also is not conducive to environmental safety and human health.

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  • Synthesis method of sulfur-doped reduced graphene used for adsorbing organic pollutants
  • Synthesis method of sulfur-doped reduced graphene used for adsorbing organic pollutants
  • Synthesis method of sulfur-doped reduced graphene used for adsorbing organic pollutants

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preparation example Construction

[0028] The present invention proposes a synthetic method for sulfur-doped reduced graphene used for adsorption of organic pollutants, comprising the following steps:

[0029] 1) Prepare an ethanol solution with a volume ratio of ethanol and deionized water of 1:2 to 1:4, add graphene oxide to it to make the concentration 0.5 mg / mL to 2 mg / mL, and then add polyethylene glycol 1500, Make the concentration 0.075mg / mL~0.15mg / mL, and perform ultrasonic dispersion for 30~60 minutes to obtain a graphene oxide suspension;

[0030] 2) Dissolving the water-soluble sulfide in the graphene oxide suspension, so that the mass concentration ratio of sulfur to graphene oxide is 1:1 to 1:5, and ultrasonically dispersing for 30 to 60 minutes, so that the solution is fully mixed and uniform;

[0031] 3) Add 20mL-100mL isopropanol to the mixed solution obtained in step 2), stir for 30-60 minutes, then add 4mL-15mL ammonia solution, stir and mix evenly;

[0032] 4) placing the mixed solution obta...

Embodiment 1

[0042] A method for synthesizing sulfur-doped reduced graphene for adsorption of organic pollutants, comprising the following steps:

[0043] 1) Weigh a certain amount of graphene oxide and disperse it in a certain concentration of ethanol solution (the volume ratio of ethanol and deionized water is 1:2), so that the mass volume ratio is 0.5mg / mL, and then add it to the mixed solution Adding an appropriate amount of polyethylene glycol 1500 (PEG1500) to make the concentration 0.075mg / mL, placing the above solution in an ultrasonic oscillator, ultrasonically dispersing for 30 minutes, so that the solution is fully mixed and uniform, and a graphene oxide suspension is obtained;

[0044] 2) Take a certain amount of water-soluble sulfide, such as L-cysteine ​​or thiourea, and dissolve it in the graphene oxide suspension obtained in step 1), so that the mass concentration ratio of sulfur to graphene oxide is 1 : 1, the solution was placed in an ultrasonic oscillator for ultrasonic ...

Embodiment 2

[0051] 1) Weigh a certain amount of graphene oxide and disperse it in a certain concentration of ethanol solution (the volume ratio of ethanol and deionized water is 1:4), so that the mass volume ratio is 2mg / mL, and then add An appropriate amount of polyethylene glycol 1500 (PEG1500) to make the concentration 0.15 mg / mL, place the above solution in an ultrasonic oscillator, and ultrasonically disperse for 60 minutes, so that the solution is fully mixed uniformly to obtain a graphene oxide suspension;

[0052] 2) Take a certain amount of water-soluble sulfide, such as L-cysteine ​​or thiourea, and dissolve it in the graphene oxide suspension obtained in step 1), so that the mass concentration ratio of sulfur to graphene oxide is 1 : 5, the solution was placed in an ultrasonic oscillator for ultrasonic dispersion for 60 minutes, so that the solution was fully mixed;

[0053] 3) Add 100 mL of isopropanol to the mixed solution obtained in step 2), place it in a magnetic stirrer a...

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Abstract

The invention belongs to the technical fields of radiation chemistry and graphene nano-materials, and provides a synthesis method of sulfur-doped reduced graphene used for adsorbing organic pollutants. The method comprises the following steps: preparing an ethanol solution of graphene oxide, with the concentration of 0.5-2 mg/mL, adding polyethylene glycol 1500 to make the concentration be 0.075-0.15 mg/L, carrying out ultrasonic dispersion for 30-60 min to dissolve water-soluble sulfides in the obtained graphene oxide suspension in order to make a mass concentration ratio of sulfur to graphene oxide be 1:1 to 1:5, adding 20-100 mL of isopropanol, stirring the obtained solution for 30-60 min, adding 4-15 mL of an ammonia water solution, and irradiating the obtained solution with electron beams at an irradiating dose of 70-350 kGy; and sequentially cleaning the obtained material with ethanol and distilled water after the irradiation is finished, centrifuging the cleaned material, repeating the cleaning and centrifuging steps, and drying the obtained solid to obtain a dried solid which is the sulfur-doped reduced graphene. The technical problems of complex preparation technology, use of toxic and harmful reagents, high reaction temperature and poor adsorption performance in the prior art are solved.

Description

technical field [0001] The invention belongs to the technical fields of radiation chemistry and graphene nanomaterials, and relates to a synthesis method of sulfur-doped reduced graphene used for adsorption of organic pollutants. Background technique [0002] Volatile organic pollutants (VOCs) are a class of low-boiling, volatile organic compounds. Their pollution has become one of the major problems facing human survival and development. VOCs discharged into the atmosphere will destroy the ozone layer in the atmosphere and cause photochemical The generation of smog, and most of the VOCs are toxic and harmful, will irritate the human respiratory tract, eyes, nose, etc., and cause great harm to human health. The most commonly used methods for VOCs treatment are physical methods and chemical methods, and in these Among the methods, the adsorption method has been widely studied and applied due to its advantages of fast rate and convenient operation. At present, the adsorption p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/30B01D53/02
CPCB01J20/20B01D53/02B01D2257/708B01J20/02
Inventor 肖硕焦正肖岗行
Owner 肖硕
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