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95results about How to "Achieve selective adsorption" patented technology

Quality chemical sensor using functionalized mesoporous material as sensitive material and method

The invention relates to a quality chemical sensor using a functionalized mesoporous material as a sensitive material, and a manufacturing method and application thereof, and belongs to the field of micro-nano sensors. The sensor is characterized in that: an organic functionalized mesoporous material is used as the sensitive material, and a quality transducer is used as a sensitive detection platform. In the quality chemical sensor, preferential adsorption of specific target chemical molecules is realized by utilizing specific organic functional groups of the functionalized mesoporous material, the adsorption capacity of the sensitive material to the specific target chemical molecules is improved by utilizing the high specific surface area and porosity of the functionalized mesoporous material, and the adsorption of the functionalized mesoporous material to the specific target chemical molecules is converted into electrical signals to be outputted by utilizing the quality transducer so as to detect the specific target chemical molecules.
Owner:SHANGHAI INST OF MICROSYSTEM & INFORMATION TECH CHINESE ACAD OF SCI

Expanded bed adsorption medium with sulfhydryl ethylpyridine and sulfone group as ligand separation antibody and preparation method

The invention discloses an expanded bed adsorption medium for separating antibodies by taking mercapto ehtylpyridine and sulfonyl groups as petunidins, and a preparation method. In the composition of the medium, interstitial substance is cellulose / inorganic weighting-agent composite microspheres, and the petunidins are sulfonyl groups or mercapto ehtylpyridine. The cellulose / inorganic weighting-agent composite microspheres which are used as the interstitial substance are obtained by adopting an opposite-phase suspension thermal-reproduction method; dried activation interstitial substance, the mercapto ehtylpyridine and sodium hydroxide containing ammonium persulfate are mixed for coupling to obtain the expanded bed adsorption medium for separating the antibodies by taking the mercapto ehtylpyridine and the sulfonyl groups as the petunidins. The novel expanded bed adsorption medium developed in the invention enhances the selectivity of mercapto ehtylpyridine petunidin to the antibodies through bring in the sulfonyl groups, has good adsorption separation selectivity to the antibodies, and can be used for the large-scale preparation of the antibodies.
Owner:ZHEJIANG UNIV

Chiral MOF (Metal-Organic Framework) magnetic graphene functional material, and preparation method and application thereof

The invention discloses a chiral MOF (Metal-Organic Framework) magnetic graphene functional material, which is synthesized by a normal-pressure in-situ synthesis method that magnetic graphene and a chiral MOF are subjected to cook in one pot. The chiral MOF magnetic graphene functional material synthesized by the method has the advantages of good dispersibility, stable structural properties, simple and quick synthesis method and the like. Compared with a traditional separation method, a magnetic solid phase extraction technology has the advantages of simpleness in operation, short analysis time, little required organic solvent and reuse. The chiral recognition capability of the composite material for a binaphthol enantiomer is researched, extraction solvent, elution solvent, extraction time, elution time, the doping amount of the magnetic graphene and the like are optimized, the composite material has higher selective adsorption capacity for the binaphthol enantiomer, an ee value of the composite material can reach up to 74.8%, a whole adsorption process can be finished within three minutes, and the ee value of the composite material is not obviously lowered after the material is reused for seven times.
Owner:ZHENGZHOU UNIV

Porous reduced graphene oxide oil absorption material with controllable doping level and preparation method thereof

ActiveCN106693898AHigh oil absorptionFacilitates selective oil absorptionOther chemical processesOil waterPore diameter
The invention discloses a porous reduced graphene oxide oil absorption material with a controllable doping level and a preparation method thereof. The porous reduced graphene oxide oil absorption material with the controllable doping level is of a hierarchical porous structure stacked layer by layer; a reduced graphene oxide aerogel is adopted as a substrate; and amino acid is doped in a framework of the reduced graphene oxide aerogel. The preparation method provided by the invention comprises the steps of firstly mixing graphene oxide and an amino acid reducing agent dissolving solution; then obtaining a reduced graphene oxide hydrogel through a high pressure hydrothermal method; and finally, washing the hydrogel, freezing at low temperature for pore-forming, and obtaining the porous reduced graphene oxide oil absorption material. The oil absorption material provided by the invention has favorable hydrophobicity, has a better adsorption capacity on an oil product and an organic pollutant, and achieves the aim of oil-water separation in an oil-water composite environment; and meanwhile, pore diameter distribution and a pore structure of the material can be regulated and controlled through the control on the doping level, the selective oil absorption of the material is promoted, and the selective adsorption of the oil product is realized.
Owner:SHANGHAI INST OF TECH

Aids virus specific plasma adsorption column and application method thereof

The invention relates to the field of medical instruments, and in particular to an aids virus specific plasma adsorption column and an application method thereof. The aids virus specific plasma adsorption column comprises an adsorption column cavity and resin particles, wherein the resin particles are prepared from macroporous strong-alkalinity styrene anion exchange resin; a heparin lithium layer which is 0.5-1 mm thick is adhered to the inner wall of the adsorption column cavity; a plurality of adsorption holes are distributed in the resin particles; the aperture of each adsorption hole is 120.5 nm; the two ends of the adsorption column cavity are respectively communicated with a blood catheter. The aids virus specific plasma adsorption column and the application method thereof provided by the invention can realize selective adsorption, effectively clean the plasma of aids patients, greatly increase the survival rate of the aids patients, prolong and save the lives of the patients.
Owner:倪自谦

Nucleic-acid aptamer type photoelectric sensor for detecting atrazine and preparation method of such nucleic-acid aptamer type photoelectric sensor

The invention relates to a nucleic-acid aptamer type photoelectric sensor for detecting atrazine and a preparation method of such nucleic-acid aptamer type photoelectric sensor. The preparation method includes firstly, preparing a three-dimensionally ordered macroporous 3DOM TiO2 / FTO electrode; then, performing Au nanoparticle modification through a hydrothermal reduction method so as to obtain an Au NPs / 3DOM TiO2 / FTO composite electrode; finally, combining an atrazine aptamer onto the surface of the Au NPs / 3DOM TiO2 / FTO composite electrode through an Au-S bond self-assembled film method so as to obtain an Aptamer / Au NPs / 3dom TiO2 / FTO sensor electrode. Compared with the prior art, the nucleic-acid aptamer type photoelectric sensor for detecting the atrazine and the preparation method have the advantages that the nucleic-acid aptamer is used as an atrazine recognition element, so that sensor detection selectivity is improved greatly; since a three-dimensionally ordered macroporous Au NPs / 3DOM TiO2 / FTO composite material of a microstructure is used for recognizing the molecular load of nucleic-acid aptamer element, the photoelectric catalysis performance can be enhanced effectively, atrazine detection sensitivity is improved, the limit of detection is as low as ng / L, high selective recognition is achieved, and the nucleic-acid aptamer type photoelectric sensor can be applied to detection and analysis of trace pollutants accordingly.
Owner:TONGJI UNIV

Preparation method of MXene aerogel and application of MXene aerogel to adsorption of phosphorus and uranyl

The invention relates to a preparation method of an MXene aerogel composite nano material and application of the MXene aerogel composite nano material to adsorption of phosphorus and uranyl ions, and belongs to the technical field of nano adsorption materials, and the preparation method specifically comprises the following steps: 1) performing intercalation treatment on a multi-layer MXene (Ti3C2) material under the action of organic alkali to obtain a single-layer or few-layer D-MXene suspension; (2) adding Ca<2+> ions into the D-MXene aqueous solution to form stable MXene-Ca gel; and 3) immersing the MXene-Ca gel into a phosphate solution, taking out the gel after adsorption saturation, and drying the gel in a freeze dryer to obtain the MXene-Ca-P aerogel which can be used for efficiently adsorbing and removing uranyl ions. The preparation method is simple, the uranyl adsorption capacity is large, the irradiation resistance is good, phosphorus pollutants and uranyl in water can be continuously and efficiently removed, and the MXene aerogel has important application prospects.
Owner:MATERIAL INST OF CHINA ACADEMY OF ENG PHYSICS

CO2 adsorbent and preparation method thereof

The invention provides a CO2 adsorbent and a preparation method thereof. An adsorbent carrier comprises a metal organic framework, an inorganic matter and a first forming aid, and an amine source is adopted as an active component. The preparation method comprises the following steps: mixing the metal organic framework, the inorganic matter and the first forming aid, and performing grinding, extrusion forming and first drying in sequence so as to obtain the carrier; adding adding the amine source into a solvent so as to obtain an amine group modified solution; and mixing the amine group modified solution with the carrier, and performing standing and second drying in sequence, so as to obtain the CO2 adsorbent. By adopting the adsorbent carrier prepared from the metal organic framework, theinorganic matter and the first forming aid, the specific surface area of the adsorbent can be increased, and dispersion of the active component can be facilitated, so that the adsorption capacity of the adsorbent can be increased; and as the amine source is adopted as the active component, the adsorption selectivity of the adsorbent can be improved, and the purpose of improving the CO2 adsorptioncapability is finally achieved.
Owner:CHINA HUADIAN ENG +1

Preparation and regeneration method suitable for large particle diameter activated carbon capable of adsorbing heavy metal ions

The invention provides preparation and a regeneration method suitable for large particle diameter activated carbon capable of adsorbing heavy metal ions. The activated carbon prepared by the method disclosed by the invention can achieve effective adsorption on metal ions in a liquid phase, technology in an activated carbon preparation process is simple, the activated carbon with better adsorptioncan be prepared without extra sulfonation treatment, and the technological process reduces cost; compared with a product of sulfonating the activated carbon or compared with a product which is not subjected to metal loading modification treatment and treated, the activated carbon has stronger adsorption capacity to metal ions. The activated carbon can be regenerated by the regeneration method, andthe adsorption capacity can be still kept at a higher level after the activated carbon is regenerated. The regeneration method has the characteristics of simple technological process, mild reaction condition, low preparation cost and the like. The regeneration method is especially suitable for the large particle diameter activated carbon capable of adsorbing heavy metal ions, and the regenerationmethod can achieve desorption of adsorbate in apertures of the activated carbon.
Owner:SHENZHEN GLOBAL GREENLAND NEW MATERIALS CO LTD

Preparation method of siliceous inorganic flavonoid molecular engram microsphere

The invention discloses a preparing method of silicon inorganic flavone molecular imprinting microballoon in the separating purifying domain, which comprises the following steps: blending certain density mold agent solution and functional monomer according to rate; adding and refluxing to obtain former solution; blending ethyl silicate, alcohol, water and face activator evenly; adding ammonia to do catalytic reaction; adding former solution after reacting for a certain time; hydrolyzing for certain time continuously; filtering the hydrolytic product; drying in the sorbitic extractor; extracting through alcohol for a long time; drying again to obtain the product.
Owner:TIANJIN UNIV

Preparation method of interstitial boron doping titanium dioxide photocatalytic material and application

The invention relates to a preparation method of an interstitial boron doping titanium dioxide photocatalytic material and application. An interstitial boron doping TiO2 nanometer photocatalyst can beprepared by a low-temperature sol-gel method, wherein the interstitial boron ions have an effect of serving as Lewis acid sites on the catalyst surface, and the adsorption effect on Lewis alkaline phenol is greatly enhanced. Compared with the prior art, the preparation method disclosed by the invention has the advantages that adsorption of phenol in water can be effectively enhanced, the selective adsorption aim can be achieved by virtue of different chemical configuration adsorption effects, and finally the aim of rapidly oxidizing targeted pollutants is achieved by virtue of a photocatalytic oxidation technology. The method is simple, feasible, obvious in enhanced adsorption effect, high in selectivity and high in catalytic efficiency.
Owner:TONGJI UNIV

Method for preparing fatty acid molecular imprinted polymer

The invention relates to a method for preparing fatty acid molecular imprinted polymer, which comprises the following steps of: introducing a covalent bond to form a functional monomer of the molecular imprinted polymer; mixing template solution with certain concentration and the functional monomer according to a proportion, fully stirring, and refluxing to prepare precursor solution; and adding an initiator and a crosslinker, performing water bath for 24 h, grinding the product, sieving with a screen of 200 meshes, refluxing and extracting by using methanol-acetic acid solution for a long time, fully washing the obtained product by using ethanol, and drying to constant weight by using an oven at 60 DEG C to prepare the fatty acid molecular imprinted polymer. The fatty acid molecular imprinted polymer prepared by the method has the advantages of regular shape, high mechanical strength, high physiochemical performance, swelling resistance, good selective adsorption effect and the like, can be used under extreme conditions such as acid, alkali, high temperature and the like, is suitable for separating, purifying and enriching the fatty acid from complex matrixes such as water-soluble media, animal derived foods and the like, and has wide application prospect.
Owner:TIANJIN UNIVERSITY OF SCIENCE AND TECHNOLOGY

Method for preparing glutamic acid surface molecularly imprinted polymer silica microspheres

The invention discloses a method for preparing glutamic acid surface molecularly imprinted polymer silica microspheres. The method includes the steps that a dilute hydrochloric acid soaking method is adopted, impurity removal is conducted on the surfaces of the silica microspheres, and activated silica microspheres are obtained; surface silanization modification is conducted on the activated silica microspheres, and silanization silica microspheres are obtained; RAFT functionalized processing is conducted on the silanization silica microspheres, and RAFT functionalized silica microspheres with the surfaces grafted with double sulphur ester bonds are obtained; template molecules and functional monomers are fully and uniformly mixed, then a cross-linking agent, initiator and the RAFT functionalized silica microspheres are added, a polymerization reaction occurs, and the molecularly imprinted polymer silica microspheres with the surfaces wrapped by the template molecules are obtained; elution is conducted to remove the template molecules. The surface molecularly imprinted polymer silica microspheres prepared through the method are uniform in wrapping and stable in performance, absorb L-glutamic acid selectively under a water environment and have the advantages of being short in absorption / desorption time and simple in operation.
Owner:SOUTH CHINA NORMAL UNIVERSITY

Flotation method for gold ore with higher mining obturator content

ActiveCN103691562APerfect flotation environmentImprove flotation efficiencyFlotationMineralogyMining engineering
The invention discloses a flotation method for gold ore with a higher mining obturator content and aims to solve the problems of influence, caused by the fact that a dispenser is adopted in the traditional flotation process to eliminate an obturator medium, on the flotation environment, existence of adhesive foam and deterioration of the flotation environment. The flotation method comprises the steps of ore grinding, roughing, scavenging, primary concentration and second concentration, wherein during the ore grinding, an ore pulp pH regulator and a mining obturator inhibiter are added, a collecting agent and a foaming agent are added for adjusting the ore, the ore is stirred, the roughing and floatation operation is preformed, the ore pulp pH regulator is H2SO4, the mining obturator inhibiter is (NH4)2SO4, the foaming agent is terpenic oil, the collecting agent is Z-309 and Z-305. The surface characteristics of the ore are improved by reasonably combining and adding the agents, the mining oburator is better inhibited under the condition of lower ore pulp pH, the selective adsorption of the collecting agent on the targeted mineral, namely the gold ore, is enhanced, the gold content achieves 200-276.23g / ton, the gold recovery rate achieves 87.67-92.69%. The beneficiation method is simple in process and the on-site operation is easy.
Owner:内蒙古金陶股份有限公司

Gallium arsenide-doped single crystal growth process

The invention relates to the technical field of semiconductor material preparation, and in particular, relates to a gallium arsenide-doped single crystal growth process; oxygen released in the environment and in the high-temperature process of arsenic, gallium and a quartz tube is absorbed by adding materials with high oxygen reaction activity in two links of polycrystalline synthesis and single crystal growth, and oxygen pairs are preventd from entering polycrystals and single crystals, so the influence of oxygen pollution on the material performance is greatly reduced. Si doping is carried out in the polycrystalline synthesis process, silicon enters gallium arsenide and performs effective occupying, boron oxide does not exist, and polycrystalline synthesis does not cause B to pollute polycrystalline. C, Al or Ti is placed in a quartz tube to absorb oxygen in the quartz tube in the single crystal growth process, the oxygen content in the single crystal is controlled, and polycrystalline doped impurities are not added any more. During single crystal growth, boron oxide is added to improve the single crystal rate and realize selective adsorption of impurities. The desired crystal properties are achieved.
Owner:SHANXI CHINA CRYSTAL TECH CO LTD

Titanium-based metal-organic framework adsorption material, preparation method therefor and application in separation of palladium

ActiveCN110394158AShort manufacturing timeThe preparation method of the adsorbent material is simple and easyOther chemical processesMetal-organic frameworkTitanium
The invention discloses a titanium-based metal-organic framework adsorption material, a preparation method therefor and an application in separation of palladium. The adsorption material is prepared from a titanium-based metal-organic framework and alginic acid. The invention further discloses two preparation methods for the adsorption material. The material prepared through an optimized preparation process has high adsorption rate to palladium ions and can be reused, the preparation process is simple, the reaction conditions are mild, and the production cost is low.
Owner:CHONGQING UNIVERSITY OF SCIENCE AND TECHNOLOGY +1

UiO-66-NH2 composite material used for palladium adsorption and preparation method thereof

The invention discloses a UiO-66-NH2 composite material used for palladium adsorption. The composite material comprises a main component namely UiO-66-NH2 and a modifying agent namely alginic acid, wherein the UiO-66-NH2 is a zirconium based metal organic skeleton or a hafnium based metal organic skeleton. The invention also discloses a preparation method for the composite material. According to the invention, through exploration of a UiO-66-NH2 modification manner, the UiO-66-NH2 composite material provided by the invention has a novel application for palladium adsorption, and has significantadsorption effect.
Owner:CHONGQING UNIVERSITY OF SCIENCE AND TECHNOLOGY +1

Preparation method and application of solid-phase microextraction fiber of self-assembly multi-layer porphyrin organic frame compound

The invention discloses a preparation method and application of a solid-phase microextraction fiber of a self-assembly multi-layer porphyrin organic frame compound, and belongs to the field of analytical chemistry and environmental chemistry. A stainless steel wire pretreated with aqua regia is sequentially modified with silicon hydroxyl and amino, and the porphyrin / porphyrin copper organic covalent frame compound modified solid-phase microextraction fiber is obtained by adopting a layer by layer self-assembly growth mode. A method for detecting the content of trace polycyclic aromatic hydrocarbon in water by the SPME-GC coupling technique is established, and an urban actual water sample is detected by the SPME-GC combined analysis, which discovers that the actual water sample can be effectively detected, and the home-made COFs material modified solid-phase microextraction fiber has a relatively good actual operation value.
Owner:HENAN INST OF SCI & TECH

Preparation method of macroporous weak-base anion exchange resin special for gold extraction

The invention discloses a preparation method of macroporous weak-base anion exchange resin special for gold extraction. According to the invention, a crosslinked styrene-divinylbenzene microsphere matrix obtained by regulating and controlling a preparation process of crosslinked styrene-divinylbenzene microspheres has the advantages of high mechanical strength, controllable specific surface area, adjustable aperture and the like; the weak-base anion exchange resin special for gold extraction, synthesized on the basis of the crosslinked styrene-divinylbenzene microsphere matrix also has a controllable pore structure and pore size distribution, and can realize selective adsorption with the gold element; and the total exchange capacity of the resin is 2.0-4.5 mmol / g, the gold element exchange capacity is 30-240 mg per g of dry resin, wear resistance is good, and the problems of low exchange capacity, poor mechanical strength and the like of traditional special gold extraction ion exchange resin are solved.
Owner:GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI

MIL-101/PDVB composite material for adsorbing benzene gas as well as preparation method and application of MIL-101/PDVB composite material

The invention belongs to the field of indoor air purification materials, and particularly relates to an MIL-101 / PDVB composite material for adsorbing benzene gas and a preparation method and application thereof.The preparation method comprises the steps that divinyl benzene, methacrylic acid, tetrahydrofuran, azodiisobutyronitrile and deionized water are mixed and stirred for 4 h, the mixture is put into a polytetrafluoroethylene hydrothermal reaction kettle, heat preservation is conducted for 24 h at the temperature of 100 DEG C, cooling is carried out to volatilize the solvent, and then vacuum drying is carried out to obtain carboxyl modified PDVB; sodium hydroxide, chromium nitrate nonahydrate, terephthalic acid, carboxyl modified PDVB and deionized water are subjected to ultrasonic mixing, the mixture is put into a polytetrafluoroethylene hydrothermal reaction kettle for a reaction, heat preservation is conducted for 18-24 h at the temperature of 150-170 DEG C, and then purification and drying are conducted to obtain the MIL-101 / PDVB composite material. The MIL-101 / PDVB composite material provided by the invention has relatively good adsorption performance on benzene, methylbenzene and o-xylene.
Owner:CHANGZHOU UNIV

Preparation method of graphene quantum dot fluorescent probe for paraquat detection

A preparation method of a graphene quantum dot fluorescent probe for paraquat detection comprises the following steps: firstly, soaking oriental cherry leaves in absolute ethyl alcohol, stirring, centrifuging, taking supernatant, performing rotary evaporation to obtain chlorophyll, dispersing the chlorophyll in water, heating in a microwave oven, and finally dispersing the chlorophyll in ethyl alcohol to obtain the graphene quantum dot fluorescent probe with a red emission spectrum band. The maximum emission wavelength of the graphene quantum dot fluorescent probe is 630 nm, the maximum absorption peak position of a visible region of paraquat free radicals is also at the 630 nm position, the energy levels of a fluorescent probe donor and a paraquat free radical acceptor are overlapped, fluorescence resonance energy transfer occurs, and probe fluorescence quenching is caused. The probe is poor in effect when being used for comparing and detecting aquacide, cypermethrin, chlorpyrifos and glyphosate isopropylamino, however, the detection limit is 10<-9> mol.L<-1> when being used for high-selectivity recognition and high-sensitivity detection of paraquat free radicals. The preparation method is simple and easy to implement, high in selectivity, high in sensitivity and low in detection limit.
Owner:HEFEI UNIV

Method for preparing, separating and purifying lactulose by directionally assisting lactose isomerization by using phenylboronic acid-based carrier

The invention discloses a method for preparing lactulose by directionally assisting lactose isomerization by using a phenylboronic acid-based polymer carrier and separating and purifying the product lactulose at the same time. The preparation method comprises the following steps: firstly, realizing directional selective adsorption of lactulose in a lactose isomerization system by utilizing a specific affinity adsorption effect between a phenylboronic acid functional group loaded by a phenylboronic acid-based polymer carrier and lactulose containing an ortho-position cis-hydroxyl structure, andpromoting an isomerization reaction to be carried out in the direction of generating lactulose; the conversion rate of the target product can be greatly improved, and the final lactulose yield can reach 65% or above. Meanwhile, the phenylboronic acid-based polymer carrier for directionally and selectively adsorbing lactulose can obtain a high-purity lactulose desorption solution through desorption operation, and the purity of the desorption solution can reach 95% or above.
Owner:苏州福赛思生物科技有限公司

Fiber-based adsorption material and preparation method thereof and application of fiber-based adsorption material in palladium recovery

The invention provides a fiber-based adsorption material. The fiber-based adsorption material is prepared by grafting a metal organic framework on polyacrylonitrile fibers, which serves as a matrix, through a chemical bonding method. The material disclosed by the invention combines the advantages of the fibers and the metal organic framework, and a chemical bonding mode is firmer than physical mixing; and the material is suitable for dynamic adsorption, is relatively high in practicability, and can realize efficient adsorption and recovery of palladium ions. The fiber-based adsorption material provided by the invention realizes selective adsorption of palladium ions and has high adsorption efficiency. According to a method for recovering palladium in the invention, the steps of calcination, alkali fusion and the like in a traditional method and the use of a strong oxidant are avoided, cost is low, and large-scale application can be achieved.
Owner:CHONGQING UNIVERSITY OF SCIENCE AND TECHNOLOGY

Catalytic electrode with phosphorus selectivity and preparation method thereof

The invention mainly provides a catalytic electrode material with phosphorus selectivity. The catalytic electrode material is characterized in that the electrode is formed by forming a plurality of IrO2-RuO2 transition gradient coatings outwards from a Ti matrix, the outermost layer and the secondary outer layer are coatings respectively doped with Ce and Ni by RuO2, and the total thickness of theelectrode coating is 0.1 mm; ruO2 is a catalytic activity effect, and IrO2 is an auxiliary electric conduction and catalytic effect. The electrode has an efficient degradation effect on low-concentration soluble phosphorus, the treated effluent can reach the III-class standard of Environmental Quality Standards for Surface Water (GB3838-2002), and the technical problem of pollution-free degradation of low-concentration phosphorus in sewage can be effectively solved.
Owner:KUNMING UNIV

Preparation method and application of hollow composition template molecularly imprinted polymer micro-shell

The invention discloses a preparation method and application of a hollow composition template molecularly imprinted polymer micro-shell having a selective absorption effect on sulfanilamide and quinolone antibiotics. The preparation method of the micro-shell comprises the following steps: preparing polystyrene nano-particles, preparing a pre-assembly solution, preparing molecularly imprinted nanospheres, preparing a hollow polymer material, and removing template molecules. The hollow composition template molecularly imprinted polymer micro-shell prepared by the invention not only has the advantages of being good in molecular imprinted polymer selectivity, but also has the advantages of being large in absorption capacity, rapid in absorption rate, wide in application range and the like compared with other types of molecularly imprinted polymers. The preparation method of the hollow composition template molecularly imprinted material not only can solve the existing bottleneck problems ofthe molecularly imprinted material, but also can significantly broaden the selective absorption range of the hollow molecularly imprinted material, thereby widening the application range of the molecularly imprinted material.
Owner:DALIAN POLYTECHNIC UNIVERSITY

Silver ion adsorption material as well as preparation method and application thereof

The invention provides a preparation method for a silver ion adsorption material. The preparation method comprises the following steps that firstly, under the protection of nitrogen or inert gas, a rhodamine derivative monomer, N,N'-methylene bisacrylamide, a thermal initiator and a polar organic solvent are mixed so as to obtain a raw material mixture, wherein the rhodamine derivative monomer is3-allylrhodamine or 3-butenylrhodamine; and then the nitrogen or inert gas protection atmosphere is maintained, and thermal polymerization reaction is carried out so as to obtain the silver ion adsorption material. The silver ion adsorption material obtained through the preparation method can be used for treating strong acidic wastewater with the pH value of 0.18, and in addition, when the initialconcentration of silver ions is 420 mg / L, the adsorption capacity of the silver ion adsorption material can reach 389.4 mg / g, namely, relatively high adsorbability is still achieved under strong acidconditions.
Owner:NANCHANG HANGKONG UNIVERSITY

Temperature-pH responsive molecularly-imprinted fiber membrane and preparation method thereof

The invention provides a temperature-pH responsive molecularly-imprinted fiber membrane and a preparation method thereof, belonging to the field of polymer functional materials. The preparation method of the temperature-pH responsive molecularly-imprinted fiber membrane comprises the following steps: preparing a nanofiber membrane from chitosan by using an electrostatic spinning technology, and then grafting a temperature responsive polymer poly(N-isopropylacrylamide-co-N-tert-butylacrylamide)-co-methacrylic acid on the surface of the nanofiber membrane through a free radical polymerization reaction. A prepared material has specific recognition capacity on dyes or heavy metal ions, the maximum adsorption capacity of the material on gentian violet dyes reaches 212.0 mg / g, adsorption equilibrium time is 7 min, and an desorption rate reaches 97%. The morphology of the fiber membrane is kept in a solution with a pH value of 6.0-14.0; the fiber membrane is dissolved in a solution with a pH value of 1.0-6.0; the molecular chain of a polymer brush is hydrophilic and is stretched when the temperature is lower than 32.5 DEG C; and the molecular chain is curled up and separated out from water when the temperature is higher than 32.5 DEG C. After adsorption is finished, pollutants can be easily and rapidly separated out due to temperature and pH responsiveness, so effective removal and enrichment of the pollutants are realized. The fiber membrane has a good application prospect in the aspects of environmental protection and water quality detection and analysis.
Owner:CHANGCHUN UNIV OF TECH

Preparation method of activated carbon capable of selectively adsorbing palladium

The invention relates to a preparation method of activated carbon capable of selectively adsorbing palladium (II) and belongs to the technical field of non-ferrous metallurgy. Since the activated carbon has relatively strong adsorptive property, the activated carbon is widely applied in various fields of industry and life, however, and due to poor selectivity, the application of the activated carbon in recovery of a metal is limited. Therefore, the invention provides a treatment method of the activated carbon so that the activated carbon can selectively adsorb palladium (II) in a hydrochloric acid medium. The treatment method comprises the following steps: chlorinating the activated carbon as a precursor with Cl2 at a high temperature so that carbon-chlorine bonds are introduced into the surface of the activated carbon and then treating the activated carbon with Na2S so that sulfur ether functional groups are introduced into the surface of the activated carbon. Sulfur ether is an effective extractant of palladium (II) and thus the treated activated carbon has selective adsorption to palladium (II).
Owner:SINO PLATINUM METALS CO LTD +1

Stratified hydroxide composite material and preparation method thereof

The invention provides a stratified hydroxide composite material and a preparation method thereof, wherein the stratified hydroxide composite material is obtained by reacting a stratified hydroxide with sulfonatocalixarene. Compared with the prior art, the composite material of stratified hydroxide and calixarene provided by the invention has the advantages of high specific surface area, porosity and the like of the stratified hydroxide, and meanwhile, the composite material is also capable of realizing selective absorption for phenol organic materials by means of the unique cavity structure of the calixarene compound, and the hydrophily and hydrophobicity of the cavity and the side-chain substituent group.
Owner:BEIJING NORMAL UNIVERSITY +1
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