407 results about "Dye adsorption" patented technology

The invention relates to chemical/ionic/physical compounding cross linking hydrogel and a preparation method thereof. The hydrogel is polymerized in a way that olefin monomer M1, a chemical cross-linking agent M2, multivalent ion biomacromolecule M3, an ionic cross-linking agent M4 and a physical cross-linking agent M5 are dissolved in water. The method comprises the following steps: preparing chemical/physical cross linked gel prepolymerization liquid, preparing chemical/ionic/physical cross linked gel prepolymerization liquid and preparing and purifying chemical/ionic/physical compounding cross linked gel. According to the invention, the characteristics and properties of the chemical cross-linking agent, the physical cross-linking agent and the ionic cross-linking agents are taken into consideration comprehensively, the compounding cross linking of molecular chains is realized; the prepared hydrogel is optically transparent and has higher mechanical ductility and rebound elasticity; the mechanic, optical and thermal performances and other performances can be regulated conveniently by controlling technology parameters and conditions; and the prepared hydrogel can be used in the fields such as tissue engineering, food industry, agricultural irrigation, daily chemical engineering, oil production, dye adsorption and biological medicine.

The invention relates to a method for preparing activated carbon with humic acid as a raw material and an application of the activated carbon. The method comprises the steps of mixing industrial humic acid with an activating agent which is potassium hydroxide, sodium hydroxide, zinc chloride, potassium carbonate or phosphoric acid uniformly to react under inert atmosphere protection for 1-5 hours; then cooling the product, washing the product in an acid solution until the pH value is 6-7 and drying the product, thus obtaining the activated carbon. The method is convenient to operate, is relatively low in energy consumption and is suitable for large-scale industrial production. The humic acid porous activated carbon material obtained by the method has a rich porous structure and a relatively big specific surface area, is used for preparing water purifiers or electrode materials of supercapacitors, and has methylene blue dye adsorption value of 600mg/g. Besides, the humic acid porous activated carbon material is used as the electrode material of a supercapacitor to assemble a high-performance supercapacitor. The specific capacitance of the activated carbon single electrode is 351Fg<-1>. Various test results show that the activated carbon is microporous-mesoporous composite carbon and has specific surface area of about 3200m<2>/g, the pore size distribution of the activated carbon is 1-5nm, and the pore volume of the activated carbon is about 2cm<3>/g.

The invention overcomes the defects of cytotoxicity of the existing inorganic antibacterial agent and organic antibacterial agent, and complicated compounding process of graphene oxide and fabric, and provides a graphene oxide-based anti-bacterial finishing agent for dyeing, wherein the graphene oxide-based anti-bacterial finishing agent is a composite material of chitosan/graphene oxide/dye. A preparation method of the graphene oxide-based anti-bacterial finishing agent for dyeing comprises the steps of firstly, carrying out acylating chlorination on graphene oxide based on the reaction activity of carboxyl at the surface of graphene oxide, then covalently grafting a natural antibacterial material chitosan to graphene oxide based on the reactivity between acyl chloride and active amino or hydroxyl, and adsorbing the dye on the plane of graphene oxide by phi-phi interaction between graphene oxide and a water-soluble dye. The graphene oxide-based anti-bacterial finishing agent for dyeing can be applied to textiles. Graphene oxide which has no toxic or side effect on a human body, and natural cationic polymer chitosan are selected as antibacterial components, so that the cytotoxicity is low.

The invention provides a silica-graphene composite and a preparation method thereof, and a treatment method for removing dye pollutants in water. The silica-graphene composite has laminated graphene flake structures, and silica is loaded on the laminated graphene flake structures. The silica-graphene composite has advantages of a high specific surface area, good dispersity and good hydrophilicity. Since the silica-graphene composite is a porous laminated structure, and the pi conjugate structure of graphene strongly interacts with pi functional groups in dye molecules, the dye adsorption efficiency of the silica-graphene composite is improved, and thus, the composite exerts good adsorption effect on dye pollutants in water. The composite also has the characteristics of a fast dye pollutant removal rate, great adsorption capability and stable adsorption.

The invention relates to cuprous oxide nano hollow spheres and a synthetic method thereof. The synthetic method comprises the following steps of: (1) dissolving a cupric salt in an organic solvent, and controlling the copper ion concentration at 0.01-0.6mol/L; (2) transferring the solution obtained in the step (1) into a reaction vessel, sealing the reaction vessel, putting the reaction vessel into a reaction environment in which the temperature is 120-200 DEG C, performing thermal reaction for 0.5-8 hours, and cooling the reaction vessel naturally; (3) separating the solid obtained in the step (2), washing and drying to obtain the cuprous oxide nano hollow spheres. According to the synthetic method, the cuprous oxide nano hollow spheres are prepared through a one-pot hydrothermal synthesis under the condition that any surfactant is not added; the prepared nano spheres with unique hollow structures have excellent dye adsorption capacity and lithium ion battery performance.

The present invention relates to a method for manufacturing a flexible photoelectrode and a dye-sensitized solar cell using the same. More specifically, the method for manufacturingg a photoelectrode comprises forming a nanoparticle metal oxide layer on a flexible substrate, adsorbing dyes, and then, coating polymer, thereby forming a nanoparticle metal oxide layer consisting of nanoparticle metal oxide-dye-polymer.

According to the present invention, the polymer penetrated between the nanoparticle metal oxide after dye adsorption may increase adhesion to the substrate and improve mechanical properties. Particularly, when applied for a flexible substrate such as a plastic substrate, bending property is excellent, and it may be useful for a flexible dye-sensitized solar cell having durability.

The invention discloses conducting polymeric hydrogel, sponge, a preparation method and an application thereof. Eigenstate conducting high-molecular polymer is used as a three-dimensional framework of the hydrogel, and the hydrogel is an organic conducting material having good mechanical strength and compression elasticity. The hydrogel can be obtained through step-by-step oxidative coupling polymerization on pyrroles and pyrrole derivatives by using an oxidizing agent and long-term secondary growth. Content of the conducting high-molecular polymer in the hydrogel is 1.5-21.5 wt%; maximum compression ratio can reach 90%; the hydrogel recovers to normal within 10 s to 5 min after compression; conductivity is 0.001-10 S/m; and the hydrogel has shape memory characteristics, and compression deformation recovery quantity is directly related to solvent volume. The sponge is obtained by drying the hydrogel. Mechanical strength, elasticity and conductivity of gel can be greatly maintained. With increasing of compression ratio, resistance value of the sponge is gradually reduced by 0-10%. The hydrogel and sponge of the invention can be widely applied in fields of dye adsorption, stress sensing, electrical switch and the like.

The invention relates to a preparation method of a hyperbranched polyetheramine-grafted GO adsorbent used for heavy metal and dye adsorption as well as an application thereof. The hyperbranched polyetheramine-grafted GO adsorbent is characterized in that polyether diglycidyl ether and a polyamine monomer are employed to prepare the hyperbranched polyetheramine HPEA, an alkalescence catalyst grafting oxidation graphene GO is used, so that the hyperbranched polyetheramine-grafted oxidized graphene GO-HPEA. The adsorbent preparation method is simple and easy, the adsorption quantity for the heavy metal ion or cation dye can be more than 500mg/g, and the hyperbranched polyetheramine-grafted GO adsorbent has the advantages of easy solid-liquid separation and repeatable utilization, and can be used for high efficiency treatment of heavy metal and dye in waste water.

The invention relates to a preparation method for an amphiphilic segmented copolymer with pH value and temperature sensitivities. The preparation method comprises the following steps: by adopting a reversible addition-fragmentation chain transfer polymerization process, synthesizing a macromolecular chain transfer agent namely tert-butyl polyacrylate, and subjecting the tert-butyl polyacrylate with dimethylaminoethyl methacrylate and ethylene glycol monomethyl ether methacrylate to the reversible addition-fragmentation chain transfer (RAFT) polymerization process again so as to synthesize the amphiphilic segmented copolymer P(tBA)-b-P(DMAEMA-co-PEGMA. The segmented copolymer provided by the invention can self-assemble to form micelles in an aqueous solution, and has pH value and temperature sensitivities, wherein the micelles have a critical pH value of 7 and a critical temperature of 37.5 DEG C. The preparation method provided by the invention has the advantages of high yield, relatively wide applicable monomer range, low requirements on reaction conditions, simple and convenient operation, greenness and environmental friendliness; and the amphiphilic segmented copolymer prepared by using the method provided by the invention has double pH value and temperature sensitivities and broad application prospects, and can be applied to the chemical production fields like dye adsorption, the environment protection fields like heavy metal pollution treatment, and the biomedical fields like controllable release of insoluble drugs.

The invention belongs to the technical field of solar cells, and relates to a method for preparing a dye-sensitized solar cell module. The invention utilizes flat screen printing and thermal sintering technology to prepare various structural layers of the dye-sensitized solar cell module, and then encapsulates the structural layers; the various structural layers are as follows: a photo-anode consists of a transparent glass substrate, a transparent conductive film, a nanometer porous semiconductor film, a dye adsorption layer, a conductive silver grate layer, an insulating medium protective layer and an insulating medium encapsulation layer; and a cathode consists of a transparent glass substrate, a transparent conductive layer, a platinum catalysis layer, a conductive silver grate layer, an insulating medium protective layer, an insulating medium encapsulation layer, an ultraviolet curing layer and a sealing substrate; and electrolyte is poured between the photo-anode and the cathode through a cathode hole. The method has mature technology, low cost, simplicity, controllability, and easy operation, and can realize mass-production preparation of dye-sensitized solar cell modules with large areas and various internal structures.

The invention belongs to the technical field of preparation of polymer materials and particularly relates to a preparation method of a MOFs-chitosan nanofiber composite membrane. The preparation method comprises: preparing chitosan nanofibers through an electrospinning method, and blending a synthesized MOFs material and the chitosan nanofibers so that the MOFs material and chitosan nanofibers arecompounded under the action of a cross-linking agent to form the MOFs-chitosan nanofiber composite membrane. The MOFs-chitosan nanofiber composite membrane effectively solves the problem of low strength, poor stability and poor dispersibility of the MOFs material in the chitosan fibers. The MOFs-chitosan nanofiber composite membrane has the advantages of high MOFs retention rate, high strength, excellent water resistance and excellent solvent resistance. The preparation method is simple and easy, the preparation conditions are mild, the preparation method is suitable for large-scale production, and the MOFs-chitosan nanofiber composite membrane can be used in the fields of dye adsorption, metal ion adsorption, gas adsorption and storage.

This invention dislcoses a dye adsorbent and its application as flocculant in the process of dye waste water treatment. This invented dye adsorbent is the compound of dicyandiamide, formaldehyde and alum according to a certain proportion, and after mixing, the product is produced by reaction under a certain temp., and its advantages include very good effect in decoloring the dye waste water up tothe standard of direct discharge, and cheap price and low dosage of dye adsorbent.

The invention discloses a three-component cationic dye adsorbent and a preparation method thereof. The adsorbent comprises carbon nano tubes, sodium alginate and chitosan. The preparation method comprises the following steps: (1) utilizing a mixed acid solution to carry out ultrasonic treatment on the carbon nano tubes, thus obtaining water-soluble carbon tubes; (2) dissolving chitosan in a dilute acetic acid solution, then adding sodium alginate, and stirring the materials to dissolve the materials, thus obtaining sodium alginate/chitosan blending sol A; (3) dispersing the water-soluble carbon tubes in the sol A, thus obtaining carbon tube/sodium alginate/chitosan blending sol B; (4) utilizing a No.5 injection syringe to drop the blending sol B into a calcium chloride solution one by one, carrying out crosslinking to form carbon tube/sodium alginate/chitosan composite microspheres, and then drying the carbon tube/sodium alginate/chitosan composite microspheres, thus obtaining the cationic dye adsorbent. The adsorbent gives play to the triple adsorbing effects of the carbon nano tubes, sodium alginate and chitosan on dyes, so that the cationic dye adsorption rate of the adsorbent is improved, and the adsorbent can be widely used for treating wastewater containing cationic dyes. Meanwhile, the preparation method is low in equipment requirements, simple in operation process and mild in conditions, is environment-friendly and is suitable for industrial production.

Disclosed are a dye-sensitized solar cell and a dye-sensitized solar cell module that suppress a decrease in photoelectric conversion efficiency caused by dye adsorption to an insulation layer. The dye-sensitized solar cell is characterized by having a stacked structure wherein an electroconductive layer, a photoelectric conversion layer formed of a porous semiconductor layer into which a dye is absorbed, a porous insulation layer, a catalyst layer, and a counter-electrode electroconductive layer are stacked in this order on a light-transmissive support body, with an insulation cover part that is comprised of a material which differs from that of the porous insulation layer formed on at least a part of or on all of the surface of the porous insulation layer.

The invention relates to a method for preparing nanocellulose for efficiently adsorbing heavy metal ions from natural fallen leaves and a simple method for efficiently adsorbing heavy metal ions or dyes in the polluted water, wherein the nanocellulose fiber with a diameter of 1-100nm and a length-diameter ratio of 10-1,000 is prepared. With rich functional groups on the surface, the nanocellulose can interact with the heavy metal ions or dyes in the polluted water source through complexing or static electricity so as to achieve an aim of adsorbing heavy metal ions or dyes.

The invention provides a preparation method of an acrylic acid/polyvinylpyrrolidone/palygorskite clay composite adsorbing material. The preparation method is characterized in that acrylic acid, polyvinylpyrrolidone and palygorskite clay are used as raw materials, N, N'-methylene-bisacrylamide is used as a crosslinking agent, potassium peroxodisulfate is used as an initiating agent, and the composite material with a network interpenetration structure is obtained through free radical polymerization. As the polyvinylpyrrolidone and the palygorskite clay are introduced, the network spatial structure of the polymer is adjusted through the special structure on the surface of the palygorskite clay, adsorption sites of the spatial three-dimensional network structure of the composite material are increased, and the molecular clearance gathering of the polymer is increased, so that the cationic dye adsorption property of the polymer is improved. Experiments prove that the cationic dye methylene blue adsorption capacity of the composite adsorbing material prepared by the method is 1700mg/g-1980mg/g, and the removal rate of cationic dye methylene blue is 85%-99%.

The present invention relates to a method of manufacturing a photoelectric conversion device in which selective dye adsorption can be performed easily. In the step of a dye adsorbing process, a material unit 21 having partition walls of a predetermined shape is placed over semiconductor electrodes 12₁ to 12₃, which are a titanium oxide electrode. The material unit 21 is laminated by a UV cure adhesive. Dye solutions S₁ to S₃ obtained by dissolving each of three kinds of dyes of N719, Black dye, and D149, for example, into a CH3CN/t-BuOH mixed solution are put in each of sections divided by the partition walls. The material unit 21 is inverted in that state, and left standing still for 24 hours. Then, the adhesive is removed after passage of the 24 hours. Thus, the semiconductor electrodes 12₁ to 12₃ having regions corresponding to the sections which regions are colored with the three different kinds of dyes are obtained. The present invention is applicable to a method of manufacturing a dye sensitized solar cell.

The invention discloses an ion liquid modified cellulose-based adsorbent as well as a preparation method and application thereof, and relates to the technical field of dye adsorption. The adsorbent can be degraded; the environment sustainable development is facilitated; the adsorbent can be widely applied to the printing and dying waste water treatment. The preparation method comprises the following steps of S1, adding cellulose, 2-bromo-propionic acid, p-toluenesulfonic acid and toluene into a container; connecting a water distributer on a container; S2, putting the container in an oil bath pot being 110 to 130 DEG C for constant temperature heating; performing condensing backflow for 7 to 10 hours; then, opening a side pipe piston of a water distributor to discharge out toluene-water mixed solution in the side pipe; evaporating out the toluene in the container to obtain a cellulose 2-bromopropionate coarse product; S3, performing post treatment on the cellulose and 2-bromopropionatecoarse product in the S2 to obtain dry cellulose 2-bromopropionate; S4, adding 1-methylimidazole and cellulose 2-bromopropionate dried in S3 into ethanol; performing water bath constant temperature stirring reaction for 24 to 48 hours at 40 to 70 DEG C; then, performing washing and drying to obtain the adsorbent. The method is simple; the used raw materials can be easily obtained.

The invention discloses a preparation method of a water treatment material anionic dye adsorbent in textile industry, comprising the following steps in sequence: (1) the crushed bentonite of 80-200 meshes is added into a solution dissolved with a cationic surfactant to be stirred for 2-3h and the amount of the surfactant is 100 percent of cation exchange capacity of the bentonite; (2) one or more kinds of cationic surfactants are added to be stirred for 2-3h and the total amount of the surfactants is 100 percent of cation exchange capacity of the bentonite; (3) precipitant is cleaned by the distilled water for 3-5 times, dried for 3-4 hours at the temperature of 110-120 DEG C, ground and sieved by a screen of 60-100 meshes. The adsorption capacity reaches 240mg/g at least which is more than that of normal sorbents.