CN107159108B - Nano material loaded with hydrophobic ionic liquid and application thereof - Google Patents
Nano material loaded with hydrophobic ionic liquid and application thereof Download PDFInfo
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Abstract
The invention discloses a nano material loaded with hydrophobic ionic liquid and application thereof in treating high-toxicity gaseous pollutants, wherein the material is prepared by taking a nano material as a raw material and loading the hydrophobic ionic liquid in the nano material by adopting an impregnation method; compared with the traditional material, the material of the invention has higher specific surface area, can load more ionic liquid, and has the advantages of large absorption capacity, long service time and good reliability while realizing filtration and catalysis.
Description
Technical Field
The invention relates to the technical field of air purification, in particular to a nano material loaded with hydrophobic ionic liquid and application thereof in treating high-toxicity gaseous pollutants.
Background
Common highly toxic gaseous pollutants in the air include phosphine, hydrogen sulfide, hydrogen cyanide, sulfur dioxide, arsine, mercury vapor and the like. The filtering materials for treating the toxic and harmful gases sold on the market at present are mainly common activated carbon, and although the filtering materials can perform the functions of trapping, adsorbing, catalyzing and the like on the toxic gases, the filtering materials still have the defects of short service time, poor reliability, incapability of recycling and the like.
The ionic liquid is also called as room temperature ionic liquid and room temperature molten salt, and is a substance which is composed of anions and cations and is in a liquid state at room temperature or near room temperature. The catalyst has the characteristics of almost no vapor pressure, almost no volatilization (namely no obvious vapor pressure and small volatility), good thermal stability, chemical stability and the like; and the adsorbent has good solubility to most of gases, has extremely low pollution to the environment, can be recycled, and is an environment-friendly absorbent or adsorbent. The ionic liquid can be divided into hydrophilic ionic liquid and hydrophobic ionic liquid according to the water solubility of the ionic liquid. Compared with hydrophilic ionic liquid, the hydrophobic ionic liquid can not deteriorate due to water vapor absorption during gas treatment, and has better stability. The supported ionic liquid is prepared by fixing the ionic liquid on a porous carrier material (such as activated carbon, activated carbon fiber and the like) through Van der Waals force or chemical grafting, so that the ionic liquid has the dual excellent characteristics (enhanced mass transfer and easy regeneration) of the ionic liquid and the porous material, the mass transfer problem caused by high viscosity of the ionic liquid can be solved, and the cost can be greatly reduced.
At present, the solid material for absorbing and treating the high-toxicity gaseous pollutants is mainly modified activated carbon, and the main modification method is an impregnation method, for example, the activated carbon is impregnated by using metal compounds such as Fe and the like to absorb SO2The adsorption effect is certain, but the adsorption amount per unit volume is small. For example, ASC type impregnated activated carbon, which is widely used and can adsorb various toxic gases, has two obvious disadvantages, firstly, it will produce aging and deterioration phenomena after storing in air to absorb water and carbon dioxide, so that its protective performance is greatly reduced, and secondly, it contains Cr component harmful to human body, and Cr is a strong carcinogenic substance. Secondly, the activated carbon material treated by the common modification method has certain adsorption performance on various toxic and harmful gases, but lacks efficient specificity and has poor adsorption performance on specific gases; the absorption capacity per unit volume of the modified activated carbon is relatively small.
Compared with the traditional high-toxicity gaseous pollutant adsorbing material, for example, patent CN103830900A discloses a material for adsorbing and removing hydrogen sulfide, which is a silica material modified by zinc or copper as an adsorbent, but has a specific surface area>800m2The aperture is 2-20nm, the removal rate of the hydrogen sulfide is 90%, and the hydrogen sulfide can not be recycled; patent CN101564683A discloses that transition metal copper ion modified conventional adsorbent, such as activated carbon, etc., is used to adsorb and remove phosphine gas, and the adsorption capacity is small and cannot be recycled.
Disclosure of Invention
The invention aims to provide a nano material loaded with hydrophobic ionic liquid, which is prepared by taking the nano material as a raw material and loading the hydrophobic ionic liquid in the nano material by adopting an impregnation method; the nano adsorption material can realize the purification of various high-toxicity gaseous pollutants, has high removal rate and can be recycled for many times.
The nano material is one of graphene, graphene oxide, a carbon nanotube, nano iron and nano oxidation; the nano material has a very large specific surface area and can efficiently adsorb toxic gases.
The method comprises the steps of pretreating the nano material before impregnation and loading, namely soaking the nano material in an acetone-ethanol mixed solution for 12-24 hours, filtering, boiling filter residues for 2-5 hours by using distilled water, changing water every 0.5-1 hour, filtering, and drying at 140 ℃ at 100 ℃ for later use, wherein the acetone-ethanol mixed solution is prepared by mixing acetone and ethanol according to the volume ratio of 1: 1-2. Due to the transportation process, ash or impurities are generated on the surface of the nano material, so that the pore channels of the nano material are blocked, the specific surface area, the pore volume and the like are reduced, and the load is extremely unfavorable. Therefore, removing ash and impurities from the surface of the material, increasing the specific surface area and pore volume thereof has important significance for loading, and increases the possibility of successful loading.
The anion of the hydrophobic ionic liquid is Tf2n-，PF6-，BF4-The cation is one of alkyl quaternary ammonium cation, alkyl quaternary phosphonium cation, N-alkyl pyridine cation and N, N' -dialkyl imidazole cation;
the hydrophobic ionic liquid can also be hydrophobic metal salt coordination ionic liquid, and the anion of the hydrophobic ionic liquid is Tf2n-，PF6-，BF4-The coordination metal base is copper-based or palladium-based, and forms coordination cations with one of alkyl quaternary ammonium cations, alkyl quaternary phosphonium cations, N-alkyl pyridine cations, N' -dialkyl imidazole cations, guanidine salt cations and alcohol amine cations.
The hydrophobic ionic liquid is a commercial product and a product prepared by a conventional method.
The loaded ionic liquid is hydrophobic ionic liquid, the defect of water absorption and deterioration does not exist, and the ionic liquid is an environment-friendly novel material, and has stable property after being immobilized, better removal effect and no harm to human bodies.
The invention also aims to apply the nano material loaded with the hydrophobic ionic liquid to the treatment of high-toxicity gaseous pollutants; when in use, the forming agent is added for compression forming.
For example: the filter plates are made of nano materials loaded with different types of hydrophobic ionic liquids, and different filter plates are selected and matched according to different gas environments under specific environmental conditions, so that the filter plates are strong in pertinence, efficient and convenient; or the material can be used as a poison filtering material of the gas mask, can be used in laboratories for researching or generating high-toxicity gaseous pollutants, and can also be used in toxic gas environments of military affairs, fire fighting, emergency rescue, disaster relief, mines and the like.
The compression molding method adopts a dry compression molding method to compress the nano material loaded with the hydrophobic ionic liquid into a sheet shape, the pressure is 400MPa, and the molding agent selects polyvinyl alcohol to improve the particle shape and the apparent density of the powder; the material formed by pressing is sheet-shaped, and the specific surface area of the material is more than or equal to 1000m2The pore diameter is 1-2 nm.
The hydrophobic ionic liquid is loaded on the nano material, so that the advantages of the hydrophobic ionic liquid and the nano material are combined, the nano material provides a fixed site for the ionic liquid, the reliability is improved, the ionic liquid improves the adsorption capacity of the nano material, the removal rate is more than 90 percent, the ionic liquid can be recycled, and the service time is prolonged.
The invention has the beneficial effects that:
(1) the adsorption capacity is larger than that of the traditional adsorbent, and the reliability is good;
(2) the method is suitable for various high-toxicity gaseous pollutants, and the related toxic gases mainly comprise phosphine, hydrogen sulfide, hydrogen cyanide, sulfur dioxide, arsine and mercury vapor;
(3) compared with the traditional activated carbon, the nano-material is lighter, has larger specific surface area and more pore channel structures, and can carry more ionic liquid.
(4) Can be recycled and has long service life. The material can be recycled for more than 20 times, the quality is not lost, and the adsorption effect is not obviously reduced.
Detailed Description
The present invention will be described in further detail with reference to examples, but the scope of the present invention is not limited to the examples.
Example 1: the nano material loaded with hydrophobic ionic liquid takes a carbon nano-tube as a carrier and Pd+-[Bu3NMe][Tf2n]For loading ionic liquid, the carbon nanotubes are pretreated before being impregnated and loaded, the pretreatment step comprises the steps of soaking the carbon nanotubes for 12 hours by using acetone-ethanol mixed solution with the volume ratio of 1:1, filtering, boiling filter residues for 2 hours by using distilled water, changing water every 1 hour, filtering, and drying at 100 ℃; mixing the treated carbon nanotube and hydrophobic ionic liquid in a volume ratio of 1:2, shaking at 35 deg.C for 3h, standing for 24h, washing, filtering, drying at 120 deg.C to constant weight, and cooling to room temperature to obtain Pd+-[Bu3NMe][Tf2n]-carbon nanotubes loaded material; under the conditions that the pressure is 400MPa and the forming agent is polyvinyl alcohol, the prepared Pd is obtained by a dry pressing forming method+-[Bu3NMe][Tf2n]-carbon nanotube loaded material powder is compressed into tablets; wherein Pd+-[Bu3NMe][Tf2n]For loading ionic liquids, reference is made to the literature "Boss E, Berthon L, Zorz N, et al.Stabilty of [ MeBu3N][Tf2N]under gamma irradiation.[J]The [ Bu ] obtained by the method in Dalton Transactions,2008, 8(7):924 ]3NMe][Tf2n]Based on the ionic liquid, weighing the ionic liquid and PdCl according to the molar ratio of 2:12Adding into a reactor, and fully mixing and reacting for 2h in a closed environment at normal temperature to obtain Pd+-[Bu3NMe][Tf2n]。
The processing object is as follows: leakage gas containing CO as main component and H2The S content is 2% by volume. The gas was passed through Pd at a flow rate of 50L/min at room temperature+-[Bu3NMe][Tf2n]Carbon nanotubes loaded material, showing good purification effect on H2The removal rate of S is more than 95%. Adsorbing saturated Pd+-[Bu3NMe][Tf2n]Desorption of carbon nanotubes loaded material at 100 ℃ H2S is completely released to desorb the materialThe material is used for treating the yellow phosphorus tail gas, the mass loss is not obvious after the circulation is carried out for more than 20 times, and the adsorption quantity is not obviously changed.
Example 2: the nano material loaded with the hydrophobic ionic liquid takes a carbon nano tube as a carrier and Cu+-[Omim][PF6]For loading ionic liquid, the carbon nanotubes are pretreated before being impregnated and loaded, the pretreatment step comprises the steps of soaking the carbon nanotubes for 15 hours by using acetone-ethanol mixed liquor with the volume ratio of 1:1, filtering, boiling filter residues for 3 hours by using distilled water, changing water every 1 hour, filtering, and drying at 120 ℃; mixing the treated carbon nanotubes with hydrophobic ionic liquid in a volume ratio of 1:2, shaking at 35 deg.C for 3h, standing for 24h, washing, filtering, drying at 120 deg.C to constant weight, and cooling to room temperature to obtain Cu+-[Omim][PF6]-carbon nanotubes loaded material; under the conditions that the pressure is 400MPa and the forming agent is polyvinyl alcohol, the obtained Cu is obtained by a dry pressing forming method+-[Omim][PF6]-carbon nanotube loaded material powder is compressed into tablets; wherein Cu+-[Omim][PF6]Reference is made to the publication "Wu-YaRui-Ionic liquid [ Omim]PF6Synthesis and research on deep treatment of coking phenol-containing wastewater [ J]Novel chemical material 2014(6) 206-][PF6]On the basis of the ionic liquid, weighing the ionic liquid and CuCl according to the molar ratio of 2:1, adding the ionic liquid and CuCl into a reactor, and fully mixing and reacting for 2 hours in a closed environment at normal temperature to obtain Cu+-[Omim][PF6]。
The processing object is as follows: sealing the tail gas of the calcium carbide furnace, wherein the gas is N2As a main component, pH3The content was 3% by volume. The gas was passed through Cu at a flow rate of 50L/min at room temperature+-[Omim][PF6]Carbon nanotubes loaded material, showing good purification effect on pH3The removal efficiency is more than 99%. Adsorbing saturated Cu+-[Omim][PF6]Desorption of carbon nanotubes loaded material at 100 ℃ to negative pH3Is completely released, the desorbed material is used for treating the yellow phosphorus tail gas, no obvious quality loss exists after the circulation is carried out for more than 20 times, and the adsorption quantity is not obviously changed.
Example 3: the nano material loaded with the hydrophobic ionic liquid takes graphene as a carrier, [ TMG ]][BF4]For loading ionic liquid, carrying out pretreatment on graphene before impregnation loading, wherein the pretreatment step comprises the steps of soaking the graphene for 15 hours by using acetone-ethanol mixed liquor with the volume ratio of 1:2, filtering, boiling filter residues for 5 hours by using distilled water, changing 1 time of water every 0.5 hour, finally filtering, and drying at 120 ℃; mixing the treated graphene material and hydrophobic ionic liquid according to the volume ratio of 1:2, shaking for 4h at 45 ℃, standing for 24h, washing, filtering, drying to constant weight at 120 ℃, and cooling to room temperature to obtain [ TMG ]][BF4]-graphene supported materials. Under the conditions that the pressure is 400MPa and the forming agent is polyvinyl alcohol, the prepared load powder is pressed into tablets by a dry pressing forming method; wherein [ TMG ]][BF4]For loading ionic liquids, reference is made to "Tian S, Hou Y, Wu W, et al2atHigh Temperatures by Ionic Liquids and theAbsorption Mechanism[J]The method in Bulletin-Korea Chemical Society, 2014, 35(9): 2791-.
The processing object is as follows: laboratory gases, experimental processes producing SO2Gas containing air as main component, SO2The content was 8% by volume. The gas was passed through [ TMG ] at a flow rate of 50L/min][BF4]Graphene-supported materials, showing good purification effect on SO2The removal efficiency is more than 95%. Adsorbing saturated TMG][BF4]-desorption of SO from graphene-loaded material at 100 ℃2Is completely released, and the desorbed material is used for the SO-containing material2The gas treatment is circulated for more than 20 times without obvious mass loss and obvious change of the adsorption quantity.
Example 4: the nano material loaded with the hydrophobic ionic liquid takes graphene oxide as a carrier, [ Bmim ]][BF4]For loading ionic liquid, carrying out pretreatment on graphene oxide before impregnation loading, wherein the pretreatment step comprises the steps of soaking the graphene oxide in acetone-ethanol mixed liquor with the volume ratio of 1:1.5 for 23 hours, filtering, boiling filter residues with distilled water for 3 hours, changing water every 0.8 hour for 1 time, finally filtering, and drying at 140 ℃; will be provided withMixing the treated graphene oxide and hydrophobic ionic liquid according to the volume ratio of 1:2, shaking for 3h at 35 ℃, standing for 24h, washing, filtering, drying to constant weight at 120 ℃, and cooling to room temperature to obtain [ Bmim ]][BF4]-graphene oxide supported materials. Under the conditions that the pressure is 400MPa and the forming agent is polyvinyl alcohol, the prepared load powder is pressed into tablets by a dry pressing forming method; wherein [ Bmim ]][BF4]Reference is made to the literature "Yang Hui Qiong, Yi Xiang. [ bmim ] for loading ionic liquids]BF4Preparation of ionic liquid and study of catalytic esterification reaction thereof [ J]The journal of the Hunan engineering college (Kokai edition), 2008, 18(1):80-83.
The processing object is as follows: industrial tail gas, the gas being NO2The HCN content is 5 percent by volume; the gas was passed through [ Bmim ] at a flow rate of 50L/min][BF4]The graphene oxide supported material shows good purification effect, and the removal efficiency of HCN is over 95 percent. Adsorbing the saturated [ Bmim ]][BF4]And (3) carrying out desorption and negative treatment on the graphene oxide supported material at 100 ℃, completely releasing HCN, and circulating the desorbed material for treating the HCN-containing gas for more than 20 times without obvious mass loss and obvious change of the adsorption quantity.
Example 5: the nano material loaded with hydrophobic ionic liquid takes graphene as a carrier, [ Omim][Tf2n]For loading ionic liquid, carrying out pretreatment on graphene before impregnation loading, wherein the pretreatment step comprises the steps of soaking the graphene for 23 hours by using acetone-ethanol mixed liquor with the volume ratio of 1:1.5, filtering, boiling filter residues for 3 hours by using distilled water, changing water every 0.8 hour for 1 time, finally filtering, and drying at 140 ℃; mixing the treated graphene and hydrophobic ionic liquid according to the volume ratio of 1:2, shaking for 3h at 35 ℃, standing for 24h, washing, filtering, drying to constant weight at 120 ℃, and cooling to room temperature to obtain [ Omim [ ]][Tf2n]-graphene supported materials. Under the conditions that the pressure is 400MPa and the forming agent is polyvinyl alcohol, the prepared load powder is pressed into tablets by a dry pressing forming method; wherein [ Omim][Tf2n]Reference document of ionic liquid loading 'Lijiang Na' design synthesis and application basic researchD]University of Kunming science, 2014 ".
The processing object is as follows: laboratory gas, which leaks mercury vapor, and the gas takes air as a main component, and the content of the mercury vapor is 6 percent of volume fraction; the gas was passed through Omim at a flow rate of 50L/min][Tf2n]The graphene-loaded material has a good purification effect, and has a mercury removal efficiency of more than 98%. Adsorbing saturated [ Omim][Tf2n]The graphene loaded material is desorbed at 100 ℃, mercury is completely released, and the desorbed material is used for treating the mercury-containing gas, so that no obvious mass loss exists after the material is circulated for more than 20 times, and the adsorption quantity is not obviously changed.
Example 6: the nano material loaded with the hydrophobic ionic liquid takes nano alumina as a carrier and Cu+-[eamim][PF6]For loading ionic liquid, the nano alumina is pretreated before being impregnated and loaded, the pretreatment step comprises the steps of soaking the nano alumina in acetone-ethanol mixed solution with the volume of 1:1.2 for 23 hours, filtering, boiling filter residues for 3 hours by using distilled water, changing water every 0.7 hour for 1 time, finally filtering, and drying at the temperature of 130 ℃; mixing the treated nano-alumina and hydrophobic ionic liquid according to the volume ratio of 1:2, shaking for 3h at 35 ℃, standing for 24h, washing, filtering, drying to constant weight at 120 ℃, and cooling to room temperature to obtain Cu+-[eamim][PF6]-nano alumina supported material. Under the conditions that the pressure is 400MPa and the forming agent is polyvinyl alcohol, the prepared load powder is pressed into tablets by a dry pressing forming method; wherein Cu+-[eamim][PF6]Reference document for loading ionic liquid, "Lijiang Na. design synthesis and application basic research of hydrophobic ionic liquid [ D]University of Kunming science 2014 ", to obtain [ eamim ]][PF6]On the basis of the ionic liquid, weighing the ionic liquid and CuCl according to the molar ratio of 2:1, adding the ionic liquid and CuCl into a reactor, and fully mixing and reacting for 2 hours in a closed environment at normal temperature to obtain Cu+-[eamim][PF6]。
The processing object is as follows: arsenic smelting tail gas, which contains CO as main component and AsH3The content is 6 percent by volume; the gas was passed through Cu at a flow rate of 50L/min+-[eamim][PF6]A nano-alumina supported material, showing a good purification effect on AsH3The removal efficiency is more than 98 percent; adsorbing saturated Cu+-[eamim][PF6]Desorption of nano alumina supported material at 100 deg.C, AsH3Is completely released, and the desorbed material is applied to the AsH-containing material3The gas treatment is circulated for more than 20 times without obvious mass loss and obvious change of the adsorption quantity.
Example 7: aiming at the industrial tail gas with complex components, a plurality of materials can be selected and assembled in the reactor to achieve the effect of removing simultaneously
Material one: the nano material loaded with the hydrophobic ionic liquid takes nano iron as a carrier and Pd+-[Hmim][Tf2n]For loading ionic liquid, the nano-iron is pretreated before being impregnated and loaded, the pretreatment step comprises the steps of soaking the nano-iron for 12 hours by using acetone-ethanol mixed liquor with the volume of 1:1, filtering, boiling filter residues for 2 hours by using distilled water, changing water every 1 hour, finally filtering, and drying at the temperature of 100 ℃; mixing the treated nano-iron and hydrophobic ionic liquid according to the volume ratio of 1:2, shaking for 3h at 35 ℃, standing for 24h, washing, filtering, drying to constant weight at 120 ℃, and cooling to room temperature to obtain Pd+-[Hmim][Tf2n]-nano-iron supported materials. Under the conditions that the pressure is 400MPa and the forming agent is polyvinyl alcohol, the prepared load powder is pressed into tablets by a dry pressing forming method; wherein Pd+-[Hmim][Tf2n]Reference document for loading ionic liquid, "Lijiang Na. design synthesis and application basic research of hydrophobic ionic liquid [ D]Prepared by the method in university of Kunming science 2014 ″ [ Hmim ]][Tf2n]Based on the ionic liquid, weighing the ionic liquid and PdCl according to the molar ratio of 2:12Adding into a reactor, and fully mixing and reacting for 2h in a closed environment at normal temperature to obtain Pd+-[Hmim][Tf2n]。
Material II: the nano material loaded with the hydrophobic ionic liquid takes a carbon nano tube as a carrier and Cu+-[Bmim][PF6]For loading ionic liquid, the carbon nanotube is pretreated before being impregnated and loaded, and the pretreatment step is carried outSoaking a carbon nanotube in an acetone-ethanol mixed solution with a volume of 1:1 for 12 hours, filtering, boiling filter residues for 2 hours by using distilled water, changing water every 1 hour, filtering, and drying at 100 ℃; mixing the treated carbon nanotubes with hydrophobic ionic liquid in a volume ratio of 1:2, shaking at 35 deg.C for 3h, standing for 24h, washing, filtering, drying at 120 deg.C to constant weight, and cooling to room temperature to obtain Cu+-[Bmim][PF6]-carbon nanotubes loaded material. Under the conditions that the pressure is 400MPa and the forming agent is polyvinyl alcohol, the prepared load powder is pressed into tablets by a dry pressing forming method; wherein Cu+-[Bmim][PF6]For loading ionic liquid, reference is made to the publication "Wu YaRui, Guanwei province, Liyuliang, et al]PF6Microwave synthesis, characterization and use of [ Bmim ]]PF6TiO as medium2Preparation study of photocatalyst [ J]New chemical material, 2011, 39(3):87-90. ", and its preparation method][PF6]On the basis of the ionic liquid, weighing the ionic liquid and CuCl according to the molar ratio of 2:1, adding the ionic liquid and CuCl into a reactor, and fully mixing and reacting for 2 hours in a closed environment at normal temperature to obtain Cu+-[Bmim][PF6]。
Material three: the nano material loaded with hydrophobic ionic liquid takes graphene as a carrier, [ Omim][Tf2n]For loading ionic liquid, carrying out pretreatment on graphene before impregnation loading, wherein the pretreatment step comprises the steps of soaking the graphene for 23 hours by using acetone-ethanol mixed liquor with the volume of 1:1.5, filtering, boiling filter residues for 3 hours by using distilled water, changing water every 0.8 hour, filtering, and drying at 140 ℃; mixing the treated graphene and hydrophobic ionic liquid according to the volume ratio of 1:2, shaking for 3h at 35 ℃, standing for 24h, washing, filtering, drying to constant weight at 120 ℃, and cooling to room temperature to obtain [ Omim [ ]][PF6]-graphene supported materials. Under the conditions that the pressure is 400MPa and the forming agent is polyvinyl alcohol, the prepared load powder is pressed into tablets by a dry pressing forming method; wherein [ Omim][Tf2n]Reference document for loading ionic liquid, "Lijiang Na. design synthesis and application basic research of hydrophobic ionic liquid [ D]University of Kunming science, 2014 ".
Treatment ofObject: yellow phosphorus tail gas containing CO as main component and H2S content 5% by volume, pH3The content is 8% by volume and CO2The content volume fraction is 2%. The gas passes through a fixed bed reactor equipped with three carbon nano materials loaded with hydrophobic ionic liquid at the flow rate of 50L/min at room temperature, shows good purification effect and is used for H2The removal rate of S is more than 95 percent and the PH value is adjusted3The removal efficiency is more than 99 percent, and the removal efficiency is high for CO2The removal efficiency is more than 98%. Desorbing the three materials at 100 deg.C to obtain H2S、PH3、CO2All are completely released, the desorbed material is reused for the treatment of the yellow phosphorus tail gas, no obvious quality loss exists after more than 20 times of circulation, and the adsorption quantity has no obvious change.
Claims (3)
1. A nanometer material loaded with hydrophobic ionic liquid is characterized in that: the nano-material is taken as a raw material, and the nano-material is prepared by loading hydrophobic ionic liquid in the nano-material by an impregnation method;
when in use, the nano material loaded with the hydrophobic ionic liquid is made into a sheet by a dry pressing forming method, the pressure is 400MPa, and the forming agent is polyvinyl alcohol;
the nano material is one of graphene, graphene oxide, a carbon nano tube, nano iron and nano aluminum oxide;
the anion of the hydrophobic ionic liquid is Tf2n-，PF6-，BF4-The cation is one of alkyl quaternary ammonium cation, alkyl quaternary phosphonium cation, N-alkyl pyridine cation and N, N' -dialkyl imidazole cation;
or the hydrophobic ionic liquid is hydrophobic metal salt coordination ionic liquid, and the anion of the hydrophobic ionic liquid is Tf2n-，PF6-，BF4-The coordination metal base is copper-based or palladium-based, and forms coordination cations with one of alkyl quaternary ammonium cations, alkyl quaternary phosphonium cations, N-alkyl pyridine cations, N' -dialkyl imidazole cations, guanidine salt cations and alcohol amine cations.
2. The hydrophobic ionic liquid-loaded nanomaterial according to claim 1, characterized in that: the method comprises the steps of pretreating the nano material before dipping and loading, namely soaking the nano material for 12-24 hours by using an acetone-ethanol mixed solution, filtering, boiling filter residues for 2-5 hours by using distilled water, changing water every 0.5-1 hour, filtering, and drying at the temperature of 140 ℃ for later use, wherein the acetone-ethanol mixed solution is prepared by mixing acetone and ethanol according to the volume ratio of 1: 1-2.
3. Use of the hydrophobic ionic liquid loaded nanomaterial of any of claims 1-2 to treat highly toxic gaseous pollutants, characterized in that: the highly toxic gaseous pollutants include phosphine, hydrogen sulfide, hydrogen cyanide, sulfur dioxide, arsine, and mercury vapor.
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| CN108554141B (en) * | 2017-12-11 | 2020-12-15 | 浙江大学 | Method for removing CO in biological hydrogen alkane gas by using graphene-loaded ionic liquid2Method (2) |
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