CN110142022A - A kind of preparation method of air cleaning graphene aerogel - Google Patents

A kind of preparation method of air cleaning graphene aerogel Download PDF

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Publication number
CN110142022A
CN110142022A CN201910306614.5A CN201910306614A CN110142022A CN 110142022 A CN110142022 A CN 110142022A CN 201910306614 A CN201910306614 A CN 201910306614A CN 110142022 A CN110142022 A CN 110142022A
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China
Prior art keywords
preparation
graphene aerogel
adsorbance
graphene
solvent
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Pending
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CN201910306614.5A
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Chinese (zh)
Inventor
孔勇
张嘉月
邵高峰
沈晓冬
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Nanjing Tech University
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Nanjing Tech University
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Priority to CN201910306614.5A priority Critical patent/CN110142022A/en
Publication of CN110142022A publication Critical patent/CN110142022A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
    • B01J20/20—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising free carbon; comprising carbon obtained by carbonising processes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/28—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
    • B01J20/28014—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their form
    • B01J20/28047—Gels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2257/00—Components to be removed
    • B01D2257/50—Carbon oxides
    • B01D2257/504—Carbon dioxide
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2257/00—Components to be removed
    • B01D2257/70—Organic compounds not provided for in groups B01D2257/00 - B01D2257/602
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2258/00—Sources of waste gases
    • B01D2258/06—Polluted air
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02C—CAPTURE, STORAGE, SEQUESTRATION OR DISPOSAL OF GREENHOUSE GASES [GHG]
    • Y02C20/00—Capture or disposal of greenhouse gases
    • Y02C20/40—Capture or disposal of greenhouse gases of CO2

Abstract

The present invention relates to a kind of preparation methods of graphene aerogel that can be used for air cleaning.The specific steps of which are as follows: ultrasound after reducing agent is added in graphene oxide water solution, it is then allowed to stand to form gel, gel is dried to obtain graphene aerogel after solvent is replaced.Graphene aerogel preparation method provided by the present invention is simple, is suitble to large-scale production, and prepared graphene aerogel has extremely-low density, high resiliency, and contains amino group, can be used for the efficient selective absorption of the gases such as formaldehyde and carbon dioxide.Prepared graphene aerogel density is 2.5~10mg/cm3, the adsorbance to carbon dioxide is 1.0~1.5mmol/g, and PARA FORMALDEHYDE PRILLS(91,95) adsorbance is 1.1~1.9mmol/g.

Description

A kind of preparation method of air cleaning graphene aerogel
Technical field
The invention belongs to the preparation field of new material, it is related to a kind of preparation method of aeroge, more particularly to a kind of available In the preparation method of the graphene aerogel of air cleaning.
Background technique
Influence of the air pollutants to the health of the mankind is more and more of interest by people, and wherein formaldehyde is to human health risk It is huge, and the main source of pollution indoor air quality, indoor formaldehyde content can be controlled by way of absorption.But at present Active carbon PARA FORMALDEHYDE PRILLS(91,95) used is adsorbed as physical absorption, and the formaldehyde being adsorbed is easily because the environmental changes such as temperature, humidity are deviate from. Novel graphene aeroge has the characteristics such as extremely-low density, high-specific surface area, macroporosity, high resiliency, is a kind of ideal suction Attached dose.But current graphene aerogel material is chiefly used in the fields such as electrode material, water process, and absorption can be used as one kind and newly answer With.
Summary of the invention
The purpose of the invention is to make up the deficiency of activated carbon adsorption formaldehyde, and provide a kind of air cleaning graphite The preparation method of alkene aeroge, this method preparation graphene aerogel in contain amino group, can be with PARA FORMALDEHYDE PRILLS(91,95) and titanium dioxide Carbon gas carries out efficient selective absorption.
The object of the invention technical solution are as follows: a kind of preparation method of air cleaning graphene aerogel, specific steps It is as follows:
Ultrasound after addition reducing agent, is then allowed to stand to form gel, gel is after solvent is replaced in graphene oxide water solution It is dried to obtain graphene aerogel.
Ultrasound after addition reducing agent, is then allowed to stand to form gel, gel is after solvent is replaced in graphene oxide water solution It is dried to obtain graphene aerogel.
It is preferred that the concentration for aoxidizing black aqueous solution is 3~11mg/mL.
It is preferred that reducing agent is dopamine, aniline or pyrroles, reducing agent and graphene oxide mass ratio are 1:(0.2~5).
It is preferred that ultrasonic temperature is 0~25 DEG C, supersonic frequency is 50~100Hz, and ultrasonic time is 5~25 minutes.
It is preferred that standing gelling temp is 40~80 DEG C, the time is 4~24 hours.
Preferred solvent displacement uses water, ethyl alcohol or n-hexane for solvent.
It is preferred that dry for vacuum drying, freeze-drying or supercritical drying.
Use graphene aerogel density made from this method for 2.5~10mg/cm3, the adsorbance to carbon dioxide is 1.0~1.5mmol/g, PARA FORMALDEHYDE PRILLS(91,95) adsorbance are 1.1~1.9mmol/g.
The utility model has the advantages that
Graphene aerogel preparation method provided by the present invention is simple, is suitble to large-scale production, prepared graphene Aeroge has extremely-low density, high resiliency, and contains amino group, can be used for the high efficiency selected of the gases such as formaldehyde and carbon dioxide Property absorption.
Specific embodiment
Example 1
It is added in the graphene oxide water solution of 3mg/mL after the dopamine of graphene oxide quality 1/5th at 25 DEG C Supersonic frequency is ultrasound 5 minutes under 100Hz, 24 hours formation gels is then stood at 80 DEG C, gel is after aqueous solvent is replaced It is 2.5mg/cm that freeze-drying, which obtains density,3Graphene aerogel, which is to the adsorbance of carbon dioxide 1.0mmol/g, PARA FORMALDEHYDE PRILLS(91,95) adsorbance are 1.1mmol/g.
Example 2
It is added in the graphene oxide water solution of 7mg/mL after graphene oxide aniline identical in quality in 15 DEG C of supersonic frequencies Rate is ultrasound 10 minutes under 50Hz, and 12 hours formation gels are then stood at 60 DEG C, and gel is true after the displacement of n-hexane solvent It is 6.5mg/cm that sky, which is dried to obtain density,3Graphene aerogel, which is to the adsorbance of carbon dioxide 1.2mmol/g, PARA FORMALDEHYDE PRILLS(91,95) adsorbance are 1.5mmol/g.
Example 3
It is added in the graphene oxide water solution of 11mg/mL after five times of graphene oxide quality of pyrroles in 0 DEG C of supersonic frequency Rate is ultrasound 25 minutes under 75Hz, 4 hours formation gels is then stood at 40 DEG C, gel is overcritical after alcohol solvent is replaced Being dried to obtain density is 10mg/cm3Graphene aerogel, which is to the adsorbance of carbon dioxide 1.5mmol/g, PARA FORMALDEHYDE PRILLS(91,95) adsorbance are 1.9mmol/g.

Claims (8)

1. a kind of preparation method of air cleaning graphene aerogel, the specific steps of which are as follows:
Ultrasound after addition reducing agent, is then allowed to stand to form gel, gel is dry after solvent is replaced in graphene oxide water solution Obtain graphene aerogel.
2. preparation method according to claim 1, it is characterised in that the concentration of the graphene oxide water solution be 3~ 11mg/mL。
3. preparation method according to claim 1, it is characterised in that the reducing agent is dopamine, aniline or pyrroles； Reducing agent and graphene oxide mass ratio are 1:(0.2~5).
4. preparation method according to claim 1, it is characterised in that the ultrasonic temperature is 0~25；Supersonic frequency is 50~100Hz；Ultrasonic time is 5~25 minutes.
5. preparation method according to claim 1, it is characterised in that the standing gelling temp is 40~80 DEG C, the time It is 4~24 hours.
6. preparation method according to claim 1, it is characterised in that the solvent displacement uses water, ethyl alcohol or n-hexane For solvent.
7. preparation method according to claim 1, it is characterised in that the drying is vacuum drying, freeze-drying or super Critical drying.
8. preparation method according to claim 1, it is characterised in that preparation-obtained graphene aerogel density is 2.5 ~10mg/cm3, the adsorbance to carbon dioxide is 1.0~1.5mmol/g, and PARA FORMALDEHYDE PRILLS(91,95) adsorbance is 1.1~1.9mmol/g.
CN201910306614.5A 2019-04-17 2019-04-17 A kind of preparation method of air cleaning graphene aerogel Pending CN110142022A (en)

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Application Number Priority Date Filing Date Title
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CN110142022A true CN110142022A (en) 2019-08-20

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CN112426804A (en) * 2020-11-17 2021-03-02 上海江南轧辊有限公司 Preparation method of emulsion purification filter screen
CN112441576A (en) * 2019-08-29 2021-03-05 中国科学院上海硅酸盐研究所苏州研究院 Modification method of graphene aerogel
CN113600135A (en) * 2021-07-27 2021-11-05 中山大学 Three-dimensional porous graphene aerogel material and preparation method and application thereof

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CN112441576A (en) * 2019-08-29 2021-03-05 中国科学院上海硅酸盐研究所苏州研究院 Modification method of graphene aerogel
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CN113600135A (en) * 2021-07-27 2021-11-05 中山大学 Three-dimensional porous graphene aerogel material and preparation method and application thereof

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Application publication date: 20190820