88 results about "Reversible adsorption" patented technology

The invention relates to a hybrid energy storage device with a zinc ion battery and a supercapacitor. The hybrid energy storage device with the zinc ion battery and the supercapacitor comprises a core body, an electrolyte and a shell body. The core body is composed of a positive electrode, a negative electrode and a separator between the positive electrode and the negative electrode. The positive electrode and the negative electrode are respectively formed by active substances, a conductive agent and a current collector, wherein the active substances and the conductive agent adhere to the current collector. The two positive electrode active materials are provided. The first positive electrode active material is a composite metal oxide, and the second positive electrode active material is a carbon material capable of conducting reversible adsorption of ions. The two negative electrode active materials are provided. The first negative electrode active material is zinc and the second negative electrode active material is a carbon material capable of conducting reversible adsorption of ions. The electrolyte is composed of zinc salt and deionized water. The composite metal oxide is simple in preparation technology and environmentally friendly.

The invention discloses a temperature-sensitive magnetic sulfadimidine molecular imprinted adsorbent as well as a preparation method and application thereof, belonging to the technical field of preparation of environment functional materials. A gamma-Fe2O3/SiO2 magnetic composite material is prepared by using a sol-gel method and is subjected to vinyl modification by using 3-(methylacryloyloxy) trimethoxypropylsilane; with a vinyl-modified magnetic composite material (MPS (Modified Polystyrene)-gamma-Fe2O3/SiO2) as a substrate material, sulfadimidine as a template molecule, acrylamide as a functional monomer, N-isopropylacrylamide as a temperature-sensitive monomer, ethylene glycol-bis(methylacrylic acid) ester as a cross-linking agent and 2,2'-azobisisobutyronitrile as an initiator, a temperature-sensitive magnetic molecular imprinted polymer is prepared by using a free group polymerization process and is applied to selective recognition and separation of the sulfadimidine in an aqueous solution; and the obtained polymer has the advantages of remarkable heat and magnet stability, sensitive magnet and heat inducting effect, higher adsorption capacity, reversible adsorption/release function along with the temperature and remarkable recognition performance of a sulfadimidine molecule.

The inventive technology may involve, in particular embodiments, novel use of a non-porous, high surface energy stationary phase to adsorb, in reversible fashion, the most polar component of a resins fraction of an input hydrocarbon when a mobile phase is passed over the stationary phase. Such reversible adsorption prevents irreversibly adsorption of such components on active stationary phase(s) downflow of the non-porous, high surface energy stationary phase, thereby conserving stationary phase costs and increasing resolution of resins elutions, and accuracy of hydrocarbon component results. Aspects of the inventive technology may also involve a novel combination of a solubility based asphaltene component fractionating and analysis method and an adsorption chromatography method for separating and/or analyzing saturate, aromatics and resins components of an input hydrocarbon.

The invention provides a preparation method for a thermo-sensitive type molecularly imprinted polymer with a metal frame. The method is used for enriching or sensing bovine hemoglobin and comprises the following steps: preparing a metal frame compound with upconversion fluorescence; introducing a thermo-sensitive monomer. According to the preparation method for the thermo-sensitive type molecularly imprinted polymer of the metal frame, UCNPs with strong fluorescence and MOF with larger specific surface area are introduced into a molecular imprinting technology, and a prepared composite material can be used for enriching or sensing the bovine hemoglobin. Meanwhile, the thermo-sensitive monomer is introduced, so that the composite material has a temperature-based reversible adsorption/release function and has a broad application prospect.

An adsorbent for selective removal of sulfur from a hydrocarbon feedstock includes a matrix material having a surface area of at least about 400 m²/g and a surface acidity of less than about 0.20 μmol/m²; and a metal phase dispersed through the matrix, the metal phase being selective to reversible adsorption of sulfur. A process for using and method for making the adsorbent are also provided.

Electrochemical treatment of chromium-containing wastewater has the advantage of simultaneously reducing hexavalent chromium (Cr^VI) and reversibly adsorbing the trivalent product (Cr^III), thereby minimizing the generation of waste for disposal and providing an opportunity for resource reuse. The application of electrochemical treatment of chromium can be often limited by the available electrochemical surface area (ESA) of conventional electrodes with flat surfaces. Here, the preparation and evaluation of carbon nanotube (CNT) electrodes containing of vertically aligned CNT arrays directly grown on stainless steel mesh (SSM). The 3-D organization of CNT arrays increases ESA up to 13 times compared to SSM. The increase of ESA can be correlated with the length of CNTs, consistent with a mechanism of roughness-induced ESA enhancemen, and the increase directly benefits Cr^VI reduction by proportionally accelerating reduction without compromising the electrode's ability to adsorb Cr^III. The results suggest that the rational design of electrodes with hierarchical structures represents a feasible approach to improve the performance of electrochemical treatment of contaminated water.

The invention discloses a preparation method of a low-sensitivity polycarboxylate water reducer. The preparation method comprises the following steps: (1) esterification, (2) sulfonation, and (3) copolymerization. According to the preparation method, an ester group is introduced through esterification of lactic acid or lactate and unsaturated acid, a long-chain-segment sulfonic acid group is introduced through sulfonation of a macromonomer end group, and a fluorine-containing group is introduced through copolymerization, and a reversible adsorption effect is achieved in a concrete mixture, so that the chemical structure is stable, the polycarboxylate water reducer is insensitive to clay, and the adaptability of the polycarboxylate water reducer to the concrete mixture is improved.

The present invention relates to a device for the reversible adsorption of carbon dioxide from a gas mixture, comprising at least one adsorbent vessel comprising one or a plurality of gas permeable cartridge vessels of an inert and dimensionally stable material, and each cartridge comprising a suitable polymeric particular adsorbent having a primary amino functionality; to an arrangement including the device, and to a method for adand desorption of carbon dioxide.

Belonging to the technical field of preparation of environment functional materials, the invention relates to a preparation method of a boron affiliated dual recognition molecularly imprinted material. The method includes: firstly modifying natural flake graphite powder to form graphene oxide, then taking graphene oxide (GO) as the matrix material to prepare an imprinted polymer (DR-MIPs) with dual recognition molecular imprinting function by atom transfer radical polymerization; and conducting a series of treatment to obtain an adsorbent, and applying the adsorbent to selective recognition and separation of luteolin in an aqueous solution. The boron affiliated dual recognition molecularly imprinted material prepared by the method provided by the invention has good thermal stability, large surface area, high adsorption capacity, the function of reversible adsorption/release of acid-base effect along with acidity and alkalinity, and significant LTL molecular recognition performance.

The invention relates to a preparation method of a magnetic temperature-sensitive surface strontium ion blotting adsorbent, and belongs to the technical field of the preparation of environmental function materials. The preparation method comprises the following steps: effectively combining Fe3O4 with aminated SBA-15 (PEI-SBA-15) Through a post grafting method to form Fe3O4@PEI-SBA-15, and carrying out vinyl modification of the Fe3O4@PEI-SBA-15 to obtain Fe3O4@PEI-SBA-15@MPS; and preparing the magnetic temperature-sensitive surface strontium ion blotting adsorbent by using the Fe3O4@PEI-SBA-15@MPS as a matrix and Sr (II) as a template. The adsorption performance of the adsorbent on the Sr (II) is investigated. The adsorbent has a substantial thermal stability, a substantial magnetic stability, a sensitive magnetic induction effect, a sensitive?thermal induction effect, a substantial temperature-dependent reversible adsorption/release function, and an obvious Sr (II) identification performance.

The invention provides hollow molecularly imprinted polymers which are modified by phenylboronic acid and an extraction column which is made by adopting the polymers. According to the synthetic method of the polymers, 3-aminophenylboronic acid is used as a modifying agent to conduct chemical modification on methacrylic acid monomers, uridine is used as a template, the modified methacrylic acid is used as functional monomers, matrixes, crosslinking agents and initiating agents are added to prepare molecularly imprinted materials, the prepared molecularly imprinted materials are subjected to template elution, the matrixes are corroded by adopting hydrofluoric acid, and the hollow molecularly imprinted polymers are obtained. The provided boron affinity hollow molecularly imprinted solid phase column has obvious enrichment effects on nucleoside type materials mainly due to the fact that molecular imprints conduct preferential adsorption on template molecules and structural analogues, and most binding sites of the hollow molecular imprints are distributed on surfaces of carrier matrix materials and in the hollow cavities and thus the adsorption efficiency is improved; furthermore, boric acid groups can carry out reversible adsorption and dissociation on the nucleoside type materials of a cis-diol structure, and therefore the boron affinity hollow molecularly imprinted solid phase column has obvious enrichment effects on the nucleoside type materials.

A porous adsorbent structure that is capable of a reversible adsorption and desorption cycle for capturing CO₂ from a gas mixture comprises a support matrix formed by a web of surface modified cellulose nanofibers. The support matrix has a porosity of at least 20%. The surface modified cellulose nanofibers consist of cellulose nanofibers having a diameter of about 4 nm to about 1000 nm and a length of 100 nm to 1 mm that are covered with a coupling agent being covalently bound to the surface thereof. The coupling agent comprises at least one monoalkyldialkoxyaminosilane.

A compound Ti-base oxide for reversible adsorptino to nitrogen oxide is prepared through preparing a compound Ti-base oxide with high specific surface area and anatase structure by sol-gel method, immersing its solid powder in the solution of soluble salt of transition metal compound, baking and calcine. Its advantages include high adsorption capacity, high regeneration speed, and converting released nitrogen oxide to nitrogen gas.

The invention discloses a microfilter membrane module for drying, cooling and defogging. The microfilter membrane module comprises a cavity, a drying agent mixture and a supporting piece, wherein thecavity is internally filled with the drying agent mixture; the supporting piece is used for separating the drying agent mixture; a micro-nanoporous film is arranged on a channel thorough which the airinside and outside the cavity can circulate, so that a microfiltration drying channel for the two-way reversible absorption and desorption of the moisture water molecules can be formed in the cavity.Therefore, the microfilter membrane module has a bidirectional regulation and control capability; the components are small in sizes, do not occupy the effective space of a shell, and only need to beassembled on a hole cover of the housing; the microfilter membrane module prevents the fogging and condensation of the interiors of electrical and electronic equipment, vehicle headlights and the like, and reduces the temperature inside the shell, so that the plastic material does not deform and age, and performance of the plastic material is effectively and reliably exerted; the microfilter membrane module can be used for a long time without maintenance during a life cycle, thus greatly lowering the later cost of a consumer.

The invention relates to the field of a super capacitor and particularly provides a metal conductive material utilized as a potassium ion hybrid super capacitor cathode and a potassium ion hybrid super capacitor, and a preparation method thereof. The potassium ion hybrid super capacitor comprises a negative electrode, an isolation film, a positive electrode and an electrolyte, wherein the negative electrodes is metal, alloy or a composite metal material capable of realizing alloying with potassium ions of the electrolyte, the positive electrode comprises a positive electrode material and a positive electrode current collector, a positive electrode active material of the positive electrode material is a carbon material capable of realizing reversible adsorption and desorption of anions of the electrolyte, and the potassium ions are contained in the electrolyte of the hybrid super capacitor. The potassium ion hybrid super capacitor is advantaged in that the metal, the alloy or the composite metal material capable of realizing alloying with the potassium ions of the electrolyte is taken as the negative electrode, the material has the double functions as the negative electrode active material and the negative electrode current collector, not only can the production process of the super capacitor be simplified, production cost is reduced, but also energy density and theoretical specific capacity of the super capacitor are improved.

The invention discloses a TiO2 xerogel for reversible adsorption of azo dye and a preparation method and application of the TiO2 xerogel, belonging to the field of absorption materials. The TiO2 xerogel for reversible adsorption of azo dye is prepared from tetrabutyl titanate, acetylacetone, alcohol, nitric acid and water as raw materials by adopting a sol-gel method through regulating the proportion of different raw materials and the formation condition of the gel. The preparation method has the advantages of simple steps, easy availability of the raw materials, and environmental friendliness of a preparation process. Proved by experiments, the prepared TiO2 xerogel can realize circulation of absorption-desorption, when the TiO2 xeroge is applied to a sensor, signal transformation can be realized by using the light-sensitive characteristic of the TiO2 xeroge, and when the TiO2 xeroge is applied to the field of water treatment, decoloring of printing and dyeing wastewater and recycling of dyes can be realized.

The invention relates to a preparation method of a halloysite surface initiated boron affinity imprinted polymer adsorbent, and belongs to the technical field of preparation of environmental functional materials. The method comprises the following steps: purifying halloysite (HNTs), and wrapping the surface of halloysite with a layer of dopamine to form HNTs@PDA; connecting a bromine initiator to the surface of the HNTs@PDA to obtain HNTs@PDA@Br; connecting vinyl imidazole to the HNTs@PDA@Br through an atom free radical polymerization technology to obtain HNTs@PDA@Br@VLD; and adsorbing zinc ions, adsorbing luteolin, introducing fluorophenylboronic acid, and carrying out ATRP polymerization in order to obtain the imprinted polymer. Imprinted polymer microspheres prepared through the method have the advantages of good chemical stability, high adsorption capacity, good acid-alkali effect, realization of reversible adsorption/release functional luteolin with the acid-base value, and specific and high selective identification performance.

A solid material is disclosed for reversibly adsorbing carbon dioxide. The material comprises a porous carrier material. Deposited on the carrier material is a salt that is capable of reacting with carbon dioxide. Optionally the solid material further contains a particulate, water-insoluble inorganic material.

The material can be used in a process for recovering carbon dioxide from a carbon dioxide containing gas mixture. The gas mixture can be atmospheric air. The process comprises a temperature swing between an adsorption temperature T₁ and a desorption temperature T₂. The difference between T₂ and T₁ is less than 200 ° C.

The invention relates to a preparation method of a three-dimensional super-molecule framework coordination polymer, and belongs to the technical field of material chemistry. A two-dimensional metal-organic framework coordination polymer {[Co(azdc)(bbtz)(H2O)2].2DMF}n is synthesized by adopting a simple solution method, two-dimensional metal-organic frameworks are further formed into an amphimorphic interpenetrating three-dimensional super-molecule framework coordination polymer through hydrogen bond effects. In the amphimorphic interpenetrating framework coordination polymer, nitrogen atoms which are not coordinated exist in ligands azdc2- and bbtz, so that the framework coordination polymer presents favorable reversible adsorption-desorption characteristic for carbon dioxide, methane, nitrogen and the like, and excellent selectivity for carbon dioxide.

A method for producing a nanocomposite sorbent comprising carbon nanotube-grafted acrylic acid/acrylamide copolymer which involves copolymerization of acrylic acid and acrylamide in the presence of an aqueous dispersion of carbon nanotubes. The method yields a nanocomposite sorbent material having a reversible adsorption capacity phenol of 5 to 2500 μg of phenol per mg of nanocomposite sorbent. Also disclosed is a method for removing organic pollutants from water using the nanocomposite sorbent.

The invention relates to a chargeable and dischargeable aqueous solution energy storage device. The energy storage device is mainly composed of a magnesium salt aqueous solution containing an organicadditive and an electrode material, wherein the negative electrode is metal magnesium or magnesium alloy; and the positive electrode is a carbon material capable of performing ion reversible adsorption/desorption, oxide capable of producing pseudocapacitance or a conductive polymer capable of generating pseudocapacitance, oxide capable of performing a redox reaction or an intercalation compound capable of performing ion reversible intercalation/deintercalation. The chargeable and dischargeable aqueous solution energy storage device has a high electrochemical stability window, and the energy density can reach more than 260Wh/kg, which is much higher than that of an ordinary aqueous solution energy storage device. The chargeable and dischargeable aqueous solution energy storage device can beused for storage and release of power.

The invention relates to an exhaust system (10) for an internal combustion engine, having an exhaust gas path which, at least in sections, has two parallel exhaust ducts (30, 32), specifically a main duct (30) and a secondary duct (32), wherein a HC adsorber (42) for the reversible adsorption of unburned hydrocarbons (HC) is provided in the secondary duct (32); having a setting means (46) for selectively conducting an exhaust gas flow into the main duct (30) and/or into the secondary duct (32), and having a main catalytic converter (40) arranged downstream of the parallel exhaust ducts (30, 32). It is intended that a catalytic exhaust gas converter (44) for converting at least one exhaust gas component is provided in the main duct (30) of the parallel exhaust ducts (30, 32).