CN107824162A - One kind absorption ion liquid modified graphene oxide of sulfur dioxide amino and preparation method thereof - Google Patents
One kind absorption ion liquid modified graphene oxide of sulfur dioxide amino and preparation method thereof Download PDFInfo
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- CN107824162A CN107824162A CN201711220475.1A CN201711220475A CN107824162A CN 107824162 A CN107824162 A CN 107824162A CN 201711220475 A CN201711220475 A CN 201711220475A CN 107824162 A CN107824162 A CN 107824162A
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- 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
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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
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- 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
- B01J20/22—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising organic material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/30—Sulfur compounds
- B01D2257/302—Sulfur oxides
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Abstract
The invention discloses one kind absorption ion liquid modified graphene oxide of sulfur dioxide amino and preparation method thereof, its preparation method comprises the following steps：First using Hummers methods synthesis graphene oxide, obtained graphene oxide and amino ionic liquid carry out ring-opening reaction and obtain the ion liquid modified graphene oxide solid absorbent of amino.The raw material of the present invention is easy to get, and preparation process simplicity is controllable, and obtained modified graphene oxide solid absorbent is used to adsorb SO2When, adsorption efficiency is higher than traditional solid absorbent, and is desorbed soon, and stability is good, reusable.
Description
Technical field
The invention belongs to desulfurization by dry method field, is specifically related to a kind of absorption sulfur dioxide amino ionic liquid structural reform
Property graphene oxide solid absorbent and preparation method thereof.
Technical background
With the high speed development of society, problem of environmental pollution becomes increasingly conspicuous, wherein SO2It is one of Air Pollutant Discharge,
It mostlys come from waste gas caused by the industry such as the burning of fossil fuel, sulfuric acid.SO2It is a kind of colourless, irritant smell
Toxic gas, the burning of fossil fuel is mainly derived from, acid rain can be formed or be dissolved in the blood and other mucus of human body, lured
Send out disease a variety of, there is very big harm to human body and environment.Therefore, how SO is effectively trapped2Cause domestic and foreign scholars
Extensive concern and research.
Desulfurization technology can be generally divided into three major types：Desulfurization before burning, (i.e. flue gas takes off for desulfurization after desulfurization and burning in burning
Sulphur).Compared to burning before and burning in desulfurization, flue gas desulfurization (flue gas desulfurization, FGD) due to process more
Add that controllable, efficient, cost is low, turn into and be presently considered to most effective, the most desulfurization technology of application potential.Flue gas desulfurization technique
Mainly there are wet desulphurization, semi-dry desulphurization and dry desulfurization three major types.Wherein, wet desulphurization is because it has high desulfuration efficiency
As the method for main desulfurization.Conventional desulfurizing agent includes alkali lye, Amine Solutions etc..But these absorbents are absorbing
SO2After rotten degraded, etching apparatus can occur, be difficult to recovery reuse, therefore greatly limit actual commercial application.
Ionic liquid has good chemical stability and heat endurance, almost without vapour pressure as a kind of low temperature molten salt.Except this
Outside, ionic liquid has good dissolubility energy to a variety of organic or inorganic gases, is a kind of environmentally friendly green solvent.
2004, Han Buxing seminars were first with [TMG] [L] ionic liquid to SO in simulated flue gas2The adsorbing and trapping of gas is carried out
Research.Then, lot of domestic and foreign researcher traps SO to ionic liquid2Behavior studied, new function ion
Liquid continues to bring out.Compared with conventional method, ionic liquid has fast absorption, arresting efficiency height, stability is good, can reclaim profit
The advantages that using.The research work delivered shows that the amino nitrogen atom with lone pair electrons can effectively facilitate ionic liquid to SO2
Adsorbing and trapping.
But wet desulphurization product is liquid or sludge, it is more difficult to is handled, flue gas needs reheating after washing, high energy consumption, accounts for
Ground area is big, and investment and operating cost are high.System complex, equipment is huge, and investment is high.And can effectively it keep away desulfurizing agent is immobilized
Exempt from these problems.Graphene oxide, a kind of Main Derivatives of graphene, not only has the thermodynamics of high specific surface area, protrusion
The advantages that performance, water resistance and mechanical strength, have in gas absorption field and be widely applied very much
The present invention will obtain having SO on amino ionic liquid supported to graphene oxide2The solid absorption of absorption property
Agent, the stability of material is high, has good SO2Adsorption-desorption effect and reusable.It is a kind of SO2Absorption property is excellent
Different solid absorbent.So far, there has been no on amino ionic liquid supported to graphene oxide and will be used for SO2Absorption
Report.
The content of the invention
Present invention aims at provide a kind of adsorbing and trapping SO2The ion liquid modified graphene oxide of amino and its preparation
Method.
The present invention carries out on graphene oxide amino ionic liquid immobilized to obtain the ion liquid modified oxidation stone of amino
Black alkene, then by the solid absorbent being prepared in SO2Evaluated in absorption example.
Specifically, the present invention relates to one kind to adsorb SO2The ion liquid modified graphene oxide of amino and its preparation side
Method, this method include：
Step 1, graphene oxide is prepared using Hummers methods, in a reservoir add mass fraction be 98% the concentrated sulfuric acid,
Graphite powder and sodium nitrate, then reaction vessel is put into 0-10 DEG C of water-bath and is stirred vigorously, is then slowly added to potassium permanganate.Its
In, the mass ratio of graphite powder and sodium nitrate is (1~4): 1, the mass ratio of graphite powder and potassium permanganate is 1: (1~8), graphite powder
For the 2%~20% of concentrated sulfuric acid mass fraction；Reaction solution continuously stirs 1~3h at 0-10 DEG C.Reaction solution is moved on to 20~60
DEG C water bath with thermostatic control in, 6~12h of stirring reaction；The deionized water of ice is slowly added into reaction solution, while bath temperature is carried
Height is to 80~96 DEG C, and then 30~60min of constant temperature, finally pours into the dilution of 100~200ml deionized waters, then in reactant
Add 15~60mL 30% hydrogen peroxide terminating reaction；After cooling with 5% salt acid elution 3~5 times, then use distilled water
Washing is neutrality to pH, and ultrasound is peeled off, and obtains graphene oxide.
Step 2, ring-opening reaction preparation is carried out by the epoxide group in the nitrogen and graphene oxide on amino ionic liquid
The ion liquid modified graphene oxide of amino, the graphene oxide prepared is diluted to 5~20mg/mL, takes 50~300mL dilute
The graphene oxide solution released is put in there-necked flask, adds 0.05~0.30g potassium hydroxide, is ultrasonically treated 5~60 minutes.Add
Enter 5~150mL hydramine into above-mentioned solution, back flow reaction 2~5 hours under the conditions of 50~90 DEG C.Reaction end obtains black
Color solution, reaction product dialysis treatment to neutrality, freeze-drying, product is standby.
The preparation of the ion liquid modified graphene oxide of described amino, it is characterised in that amino ionic liquid bag used
Include 1- amine propyl group -3- methylimidazoles chlorate, 1- amine propyl group -3- methylimidazoles Bromide, 1- amine propyl group -3- methylimidazole hexafluoros
Phosphate, 1- amine propyl group -3- methyl imidazolium tetrafluoroborates, 1- amine ethyl-3-methylimidazoles nitrate, 1- amine ethyl -3- first
Base imidazoles double (fluoroform sulphonyl) inferior amine salt, 1- amine ethyl-3-methylimidazoles hexafluorophosphate, 1- amine ethyl -3- methyl miaows
Azoles tetrafluoroborate, 1- methyl -3- (2- amino-ethyls) limidazolium hexafluorophosphate, 1- (2- amino-ethyls) -3- methylimidazole chlorine
In salt dissolving, diethanol amine acetate, diethylaluminum ethoxide amine acetate, 1- (3- Propylaminos) -3- butyl imidazole tetrafluoroborates etc.
One or more.
Present invention also offers the ion liquid modified graphene oxide of the amino in absorption SO2In application.
Preferably, the ion liquid modified graphene oxide of the amino is in absorption SO2When, the amount of the solid absorbent is
20~500mg.
Further, the solid absorbent is in absorption SO2When, adsorption temp scope is 0~50 DEG C, sulfur dioxide concentration
Scope is 0~1000ppm.Preferably, adsorption temp is 10~30 DEG C, and sulfur dioxide concentration is 10~600ppm.The solid is inhaled
Attached dose can be rapidly achieved adsorption equilibrium, the SO of partial adsorbates agent in 2~8h2Adsorbance can reach 110mg/g.The suction
Attached dose can after adsorption saturation by way of heating in vacuum to the SO of absorption2Desorption is carried out, desorption temperature is 60~150
DEG C, desorption time is 0.1~6h, desorption efficiency ＞ 99.5%, and the solid absorbent after desorption remains able to recycled for multiple times, and
And do not reduce adsorption efficiency.
Compared to the prior art, beneficial effects of the present invention are as follows：
1, the stability of solid absorbent is good, can adsorb the SO in flue gas at high temperature2And non-inactivation.The absorption of preparation
Agent is at normal temperatures and pressures to SO2With higher adsorbance.The adsorbent is to SO2Absorption and desorption rate it is fast, it is repeatable to make
With.
2, preparation process simplicity is controllable, and raw material is easy to get, mild condition.Compared with solid absorbents such as traditional activated carbons,
The ion liquid modified graphene oxide of amino produced by the present invention is used for adsorbing and removing SO2When, adsorption effect is more preferable, and selectivity is more
It is high.
Embodiment
The invention provides absorption SO2With ion liquid modified graphene oxide of amino and preparation method thereof, below in conjunction with
Embodiment is further discussed below the present invention, but the present invention should not be limited by the examples：
Embodiment 1
1- amine propyl group -3- methylimidazole chlorate modified graphene oxides are by ionic liquid 1- amine propyl group -3- methylimidazoles
Chlorate and graphite oxide alkene reaction obtain, the quality of 1- amine propyl group -3- methylimidazoles chlorates and graphene oxide during reaction
Than for 1: 1.
The preparation method of above-mentioned 1- amine propyl group -3- methylimidazole chlorate modified graphene oxides is as follows：
(1) graphene oxide is prepared using Hummer methods, flask drying is anhydrous, is put into magneton, adds 200mL in a reservoir
Mass fraction is 98% concentrated sulfuric acid, 10g graphite powders and 4g sodium nitrate, and then reaction vessel is put into 3 DEG C of water-baths and acutely stirred
Mix, be then slowly added to 20g potassium permanganate.During potassium permanganate adds, system temperature is no more than 5 DEG C.Reaction solution is 3
DEG C 2h is continuously stirred, then moved on to reaction solution in 60 DEG C of waters bath with thermostatic control, stirring reaction 12h；Ice is slowly added into reaction solution
Deionized water 100mL, while bath temperature is brought up to 95 DEG C, then constant temperature 45min, is finally poured into reactant
200ml deionized waters dilute, and then add 60mL 30% hydrogen peroxide terminating reaction；Cool down the salt acid elution 3 afterwards with 5%
It is secondary, pH is then washed with distilled water to as neutrality, ultrasonic disperse, obtains graphene oxide.
(2) graphene oxide prepared is diluted to 2mg/mL, the graphene oxide solution for taking 50mL to dilute is put in
In there-necked flask, 0.155g potassium hydroxide is added, is ultrasonically treated 1 hour.Add 100mg 1- amine propyl group -3- methylimidazole chlorates
Into above-mentioned solution, back flow reaction 3 hours under 80 DEG C of water bath conditions.Reaction end obtains dark solution, and reaction product is saturating
Analysis processing freeze-drying, obtains 1- amine propyl group -3- methylimidazole chlorate modified graphene oxides to neutrality.
Embodiment 2
1- amine propyl group -3- methylimidazole chlorate modified graphene oxides are by ionic liquid 1- amine propyl group -3- methylimidazoles
Chlorate and graphite oxide alkene reaction obtain, the quality of 1- amine propyl group -3- methylimidazoles chlorates and graphene oxide during reaction
Than for 2: 1.
The preparation method of above-mentioned 1- amine propyl group -3- methylimidazole chlorate modified graphene oxides is as follows：
(1) graphene oxide is prepared using with the identical method of embodiment 1.
(2) graphene oxide prepared is diluted to 2mg/mL, the graphene oxide solution for taking 50mL to dilute is put in
In there-necked flask, 0.155g potassium hydroxide is added, is ultrasonically treated 1 hour.Add 200mg 1- amine propyl group -3- methylimidazole chlorates
Into above-mentioned solution, back flow reaction 3 hours under 80 DEG C of water bath conditions.Reaction end obtains dark solution, and reaction product is saturating
Analysis processing freeze-drying, obtains 1- amine propyl group -3- methylimidazole chlorate modified graphene oxides to neutrality.
Embodiment 3
1- amine propyl group -3- methylimidazole chlorate modified graphene oxides are by ionic liquid 1- amine propyl group -3- methylimidazoles
Chlorate and graphite oxide alkene reaction obtain, the quality of 1- amine propyl group -3- methylimidazoles chlorates and graphene oxide during reaction
Than for 3: 1.
The preparation method of above-mentioned 1- amine propyl group -3- methylimidazole chlorate modified graphene oxides is as follows：
(1) graphene oxide is prepared using with the identical method of embodiment 1.
(2) graphene oxide prepared is diluted to 2mg/mL, the graphene oxide solution for taking 50mL to dilute is put in
In there-necked flask, 0.155g potassium hydroxide is added, is ultrasonically treated 1 hour.Add 300mg 1- amine propyl group -3- methylimidazole chlorates
Into above-mentioned solution, back flow reaction 3 hours under 80 DEG C of water bath conditions.Reaction end obtains dark solution, and reaction product is saturating
Analysis processing freeze-drying, obtains 1- amine propyl group -3- methylimidazole chlorate modified graphene oxides to neutrality.
Embodiment 4
1- amine propyl group -3- methylimidazole Bromide modified graphene oxides are by ionic liquid 1- amine propyl group -3- methylimidazoles
Bromide and graphite oxide alkene reaction obtain, the quality of 1- amine propyl group -3- methylimidazoles Bromides and graphene oxide during reaction
Than for 1: 1.
The preparation method of above-mentioned 1- amine propyl group -3- methylimidazole Bromide modified graphene oxides is as follows：
(1) graphene oxide is prepared using with the identical method of embodiment 1.
(2) graphene oxide prepared is diluted to 2mg/mL, the graphene oxide solution for taking 50mL to dilute is put in
In there-necked flask, 0.155g potassium hydroxide is added, is ultrasonically treated 1 hour.Add 100mg 1- amine propyl group -3- methylimidazole Bromides
Into above-mentioned solution, back flow reaction 3 hours under 80 DEG C of water bath conditions.Reaction end obtains dark solution, and reaction product is saturating
Analysis processing freeze-drying, obtains 1- amine propyl group -3- methylimidazole Bromide modified graphene oxides to neutrality.
Embodiment 5
1- amine propyl group -3- methylimidazole Bromide modified graphene oxides are by ionic liquid 1- amine propyl group -3- methylimidazoles
Bromide and graphite oxide alkene reaction obtain, the quality of 1- amine propyl group -3- methylimidazoles Bromides and graphene oxide during reaction
Than for 2: 1.
The preparation method of above-mentioned 1- amine propyl group -3- methylimidazole Bromide modified graphene oxides is as follows：
(1) graphene oxide is prepared using with the identical method of embodiment 1.
(2) graphene oxide prepared is diluted to 2mg/mL, the graphene oxide solution for taking 50mL to dilute is put in
In there-necked flask, 0.155g potassium hydroxide is added, is ultrasonically treated 1 hour.Add 200mg 1- amine propyl group -3- methylimidazole Bromides
Into above-mentioned solution, back flow reaction 3 hours under 80 DEG C of water bath conditions.Reaction end obtains dark solution, and reaction product is saturating
Analysis processing freeze-drying, obtains 1- amine propyl group -3- methylimidazole Bromide modified graphene oxides to neutrality.
Embodiment 6
1- amine propyl group -3- methylimidazole Bromide modified graphene oxides are by ionic liquid 1- amine propyl group -3- methylimidazoles
Bromide and graphite oxide alkene reaction obtain, the quality of 1- amine propyl group -3- methylimidazoles Bromides and graphene oxide during reaction
Than for 3: 1.
The preparation method of above-mentioned 1- amine propyl group -3- methylimidazole Bromide modified graphene oxides is as follows：
(1) graphene oxide is prepared using with the identical method of embodiment 1.
(2) graphene oxide prepared is diluted to 2mg/mL, the graphene oxide solution for taking 50mL to dilute is put in
In there-necked flask, 0.155g potassium hydroxide is added, is ultrasonically treated 1 hour.Add 300mg 1- amine propyl group -3- methylimidazole Bromides
Into above-mentioned solution, back flow reaction 3 hours under 80 DEG C of water bath conditions.Reaction end obtains dark solution, and reaction product is saturating
Analysis processing freeze-drying, obtains 1- amine propyl group -3- methylimidazole Bromide modified graphene oxides to neutrality.
The ion liquid modified graphene oxide of amino that above-described embodiment 1-6 is obtained carries out SO2Adsorption experiment, adsorbance
110mg/g is all higher than, and traditional solid absorbent is (such as：Activated carbon) SO2Adsorbance only has 76mg/g, illustrates ammonia of the present invention
The ion liquid modified graphene oxide of base is as SO2Solid absorbent is highly effective.The above-mentioned ionic liquid of adsorption equilibrium
Modified graphene oxide can be desorbed completion under 130 DEG C, vacuum condition in 20min.Afterwards, above-mentioned solid absorbent is repeatable makes
With remaining to reach original adsorption efficiency.
Understand that the ion liquid modified graphene oxide of amino of the present invention is as SO with reference to above-mentioned data2Solid absorbent side
There is remarkable result in face.Additionally, it should be noted that be that examples detailed above is only that the part preferred embodiment of the present invention illustrates the present invention
Technical thought and feature, it can understand present disclosure its object is to other people and implement according to this, can not be limited with this
Protection scope of the present invention.All equivalence changes or perfect substantially done according to thinking of the present invention, should all cover in the present invention
Protection domain within.
Claims (4)
1. the present invention relates to one kind absorption ion liquid modified graphene oxide of sulfur dioxide amino and preparation method thereof.It is special
Sign is that the ion liquid modified graphene oxide of the amino carries out ring-opening reaction by amino ionic liquid and graphene oxide and obtained
Arrive, obtained modified graphene oxide solid absorbent is used to adsorb SO2When, adsorption efficiency is than traditional solid absorbent more
Height, and be desorbed soon, stability is good, reusable.
A kind of 2. preparation side of the absorption ion liquid modified graphene oxide of sulfur dioxide amino as claimed in claim 1
Method, it is characterised in that following steps：
Step 1, graphene oxide is prepared using Hummers methods, adds the concentrated sulfuric acid, graphite that mass fraction is 98% in a reservoir
Powder and sodium nitrate, then reaction vessel is put into 0~10 DEG C of water-bath and is stirred vigorously, is then slowly added to potassium permanganate.Wherein,
The mass ratio of graphite powder and sodium nitrate is (1~4): 1, the mass ratio of graphite powder and potassium permanganate is 1: (1~8), graphite powder are
The 2%~20% of concentrated sulfuric acid mass fraction；Reaction solution continuously stirs 1~3h at 0~10 DEG C.Reaction solution is moved on to 20~60 DEG C
Water bath with thermostatic control in, 6~12h of stirring reaction；The deionized water of ice is slowly added into reaction solution, while bath temperature is improved
To 80~96 DEG C, then 30~60min of constant temperature, finally pours into the dilution of 100~200ml deionized waters, Ran Houjia in reactant
Enter 15~60mL 30% hydrogen peroxide terminating reaction；After cooling with 5% salt acid elution 3~5 times, then washed with distillation
It is neutrality to wash to pH, and ultrasound is peeled off, and obtains graphene oxide.
Step 2, ring-opening reaction is carried out by the epoxide group in the nitrogen and graphene oxide on amino ionic liquid and prepares amino
Ion liquid modified graphene oxide, the graphene oxide prepared is diluted to 2~5mg/mL, takes 50~200mL to dilute
Graphene oxide solution be put in there-necked flask, add 0.05~0.30g potassium hydroxide, be ultrasonically treated 5~60 minutes.Add
100~3000mg amino ionic liquid is into above-mentioned solution, back flow reaction 2~5 hours under the conditions of 50~90 DEG C.Reaction knot
Beam obtains dark solution, and reaction product dialysis treatment to neutrality, freeze-drying, product is standby.
A kind of 3. preparation method of the ion liquid modified graphene oxide of amino as claimed in claim 2, it is characterised in that institute
Amino ionic liquid includes 1- amine propyl group -3- methylimidazoles chlorate, 1- amine propyl group -3- methylimidazoles Bromide, 1- amine
Propyl group -3- methylimidazoles hexafluorophosphate, 1- amine propyl group -3- methyl imidazolium tetrafluoroborates, 1- amine ethyl-3-methylimidazole nitre
Double (fluoroform sulphonyl) inferior amine salts of hydrochlorate, 1- amine ethyl-3-methylimidazole, 1- amine ethyl-3-methylimidazoles hexafluorophosphate,
1- amine ethyl-3-methylimidazoles tetrafluoroborate, 1- methyl -3- (2- amino-ethyls) limidazolium hexafluorophosphate, 1- (2- amino second
Base) -3- methylimidazoles chlorate, diethanol amine acetate, diethylaluminum ethoxide amine acetate, 1- (3- Propylaminos) -3- butyl miaows
One or more in azoles tetrafluoroborate etc..
A kind of 4. application of the ion liquid modified graphene oxide of amino as claimed in claim 1, for adsorbing SO2When, and pass
The solid absorbent of system is (such as：Activated carbon) compare, adsorption efficiency improves 31% under the same conditions, and is desorbed fast, stabilization
Property it is high, it is reusable.
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| CN109201007A (en) * | 2018-09-27 | 2019-01-15 | 太原理工大学 | A kind of carbon dioxide absorber and its preparation method and application |
| CN109201007B (en) * | 2018-09-27 | 2021-02-09 | 太原理工大学 | Carbon dioxide adsorbent and preparation method and application thereof |
| CN111659346A (en) * | 2019-03-08 | 2020-09-15 | 天津大学 | Haze collecting, absorbing and converting system based on primary battery principle |
| CN111229310A (en) * | 2020-02-08 | 2020-06-05 | 河北工业大学 | Preparation method and application of ionic liquid modified nitrogen and sulfur co-doped graphene oxide composite material |
| CN111229310B (en) * | 2020-02-08 | 2023-01-10 | 河北工业大学 | Preparation method and application of ionic liquid modified nitrogen and sulfur co-doped graphene oxide composite material |
| CN115970651A (en) * | 2022-09-02 | 2023-04-18 | 山东非金属材料研究所 | Preparation method and application of graphene-ionic liquid composite sulfur adsorbent |
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