121 results about "Biphenyl-2-carboxylic acid" patented technology

The invention relates to a terbium coordination polymer and its synthesis method and application, which belong to the field of organic light-emitting materials. The invention aims to solve the technical problem of short fluorescence lifetime of the existing terbium coordination polymers. The structure of the terbium coordination polymer is a three-dimensional supramolecular network structure formed by hydrogen bonding and π-π stacking between the one-dimensional chain terbium coordination polymers. The molecular formula of the one-dimensional chain terbium coordination polymer is Tb(2 , 2'-bpdc) 1.5H2O. Method: Dissolve terbium nitrate pentahydrate and 2,2′-biphenyldicarboxylic acid in distilled water at room temperature, stir to dissolve, place in a reaction kettle, heat for reaction, and naturally cool to room temperature to obtain terbium coordination polymer. In the present invention, the terbium coordination polymer is used as an organic green fluorescent material. Terbium coordination polymers are colorless single crystals. In the solid state at room temperature, with an excitation wavelength of 304nm, it exhibits the typical strong green fluorescence of rare earth terbium ions, with a longer fluorescence lifetime τ of 1004μs.

The invention relates to a microporous rare earth cluster metal organic anion framework and a preparation method and application thereof. According to the technical scheme, the preparation method comprises the steps that RE(NO<3>)<3> / 4, 4'-diphenyldicarboxylic acid, o-fluorobenzoic acid, N, N-dimethyl formamide and ethanol are added into a container and stirred at the normal temperature; the container is sealed and then placed into a drying oven, and the container is maintained for 1-2 days at the temperature of 300-400 K; the mixture is cooled slowly to the room temperature and left standing for 20-30 hours, and crystals are obtained; N, N-dimethyl formamide is used for washing the mixture, filtration and drying are conducted, and a target product is obtained. The microporous rare earth cluster metal organic anion framework prepared through the preparation method can serve as an adsorption base material for adsorbing cation type organic dyestuff, and the cation organic dyestuff is separated in an efficient and selective mode.

The invention discloses a preparation method and an application of a magnetic metal - organic nanotube material. The preparation method comprises the following steps of (1) preparation of a Fe3O4 (ferroferric oxide) nanometer material; (2) surface hydroxylation of the Fe3O4 nanometer material: adding the Fe3O4 nanometer material prepared in step (1) into sodium dodecyl sulfate, stirring, and performing ultrasonic reaction; (3) surface silanization of Fe3O4; (4) connecting of the silanized Fe3O4 and 4,4'-biphenyldicarboxylic acid; (5) connecting of the surface of Fe3O4 modified by the 4,4'-biphenyldicarboxylic acid and the metal-organic nanotube material. The prepared metal-nanotube material has the advantages that [Co2(bpdc)1.5(Hbpz] DMF CH3CN H2O crystals of a metal - organic nanotube are radially and uniformly distributed at the surface of Fe3O4, and form a sea urchin shape; a one-dimensional weaving structure is formed by stacking different lengths in an overlapping way, so that the absorbing of polychlorinated biphenyl in a sample is favorable.

The invention supplies an intermediate to make intermediate of Telmisartan that has the structure of 4'-((4- methyl-6-(2- methylamino) carbanilino)-2-propyl-1H- benzimidazole-1-radicle) methyl) biphenyl-2-carboxylic acid. It has the advantages of high yield, save operation, low environment pollution, etc.

This invention provides polymeric coordination compounds capable of forming three-dimensional microporous metal organic frameworks (MMOFs) that are useful for detection of explosive compounds. The polymeric coordination compounds comprise a repeating unit comprising a transition metal coordinated to at least one binding member of a bidentate binding site on each of two polyfunctional ligands and one binding site of a bis-pyridine exodentate bridging ligand, for example, the repeating unit comprising formula [Zn2(bpdc)2(bpee)] (bpdc=4,4′-biphenyldicarboxylate; bpee=1,2-bipyridylethene). Methods of preparing such polymeric coordination compounds, methods of using them for detection of explosive compounds, and sensors or sensor arrays comprising such polymeric coordination compounds for detection of explosive compounds, especially those comprising one or more nitro (—NO2) groups, are also disclosed.

The invention discloses a preparation method of a nano-rod porous carbon-sulfur composite cathode material. The preparation method comprises the steps of mixing a zinc nitrate hexahydrate solution with 4,4'-biphenyl dicarboxylic acid disodium salts at a normal temperature; then centrifugally washing and drying the mixture to obtain a zinc-based metal organic framework precursor; roasting the precursor in inert gas atmosphere; mixing obtained nano-rod porous carbon with elemental sulfur; ball-grinding and drying the mixture and then carrying out thermal treatment so as to obtain the nano-rod porous carbon-sulfur composite cathode material. The prepared nano-rod porous carbon-sulfur composite cathode material is a composite material of the nano-rod porous carbon and the elemental sulfur and has the pore diameter of 1 nm-3 nm, and the elemental sulfur is located in the pore passages of the nano-rod porous carbon. The material is low in preparation cost and small in pore diameter, has the strong binding effect on the polysulfide, can effectively inhibit the shuttling effect and improve the electrochemical performance of the battery.

The invention relates to a method for electrochemical detection of acephate by the aid of a molecularly imprinted polymer film supported on the surface of a metal-organic framework material. The metal-organic framework material formed by cupric nitrate and 4,4'-biphenyldicarboxylic acid is taken as a support body, acephate is taken as a template molecule, methacrylic acid is taken as a function monomer, ethylene glycol dimethacrylate is taken as a crosslinking agent, azodiisobutyronitrile is taken as an initiator, the molecularly imprinted polymer film supported on the surface of the metal-organic framework material is synthesized and ultrasonically dispersed in a nafion solution for spin-coating of the surface of an electrode, and acephate is detected with a differential pulse voltammetry method. A molecularly imprinted polymer with large specific surface area and high mass transfer speed is obtained and is used for detecting acephate. The method has good stability and high sensitivity.

The invention discloses a preparation method for telmisartan, and belongs to the technical field of pharmaceutical synthesis. The key points of the technical scheme lie in that in the preparation method for the telmisartan takes ionic liquid as a reaction medium, and 3-methyl-4-nitryl-benzoic acid as a raw material, 2-n-propyl-4-methyl-6- carboxyl benzimidazole is obtained successively through an esterification reaction, a reduction reaction, an acylation reaction, a nitratlon reaction, a reduction reaction and a cyclization reaction, then under the action of a polyphosphoric acid, the 2-n-propyl-4-methyl-6-carboxyl benzimidazole and N-methyl-o-phenlenediamine dihydrochloride are condensed to obtain 2-n-propyl-4-methyl-6-[1-methylbenzimidazole-2-yl] benzimidazole, 2-n-propyl-4-methyl-6-[1-methylbenzimidazole-2-yl] benzimidazole is condensed with 4,-bromine biphenyl-2-carboxylic acid methyl ester, and hydrolysis is carried out to obtain the telmisartan. According to the method, the ionic liquid is used for replacing methanol with larger toxicity in an original technology to be used as the reaction medium, raw materials are easy to obtain, the operation is simple and convenient, the yield is high, the purity of products is high, the residual quantity of an organic solvent is small, and the method is environmentally-friendly and is suitable for industrialized production.

The invention provides a novel metal organic framework material with a CO2 preferential adsorption separation function and a preparation method of the metal organic framework material and belongs to the technical field of chemical sciences of inorganic and organic materials. The preparation method comprises the following steps: dissolving raw materials, namely cobalt perchlorate hydrate, 4,4'-diphenyldicarboxylic acid and 3,3',5,5'-tetramethyl-1,1'-dihydro-4,4'-dipyrazol into an organic solvent; and then reacting at 130 DEG C for 72 hours to obtain the product. According to the invention, a rarely-used method for mixing pyrazol-carboxylic acid difunctional coordinating group is adopted so as to obtain the stable novel metal organic framework material. The preparation process of the material is simple, simple and convenient to operate and low in cost; and the material has high specific surface area and good stability, is especially suitable for high preferential adsorption on CO2 and can be applied to separation and capturing of the CO2 in industrial waste gas.

The invention discloses preparation and application methods of a solid acid catalyst based on Zr-MOF. The preparation method of the catalyst comprises the following steps: with zirconium tetrachlorideor zirconium oxychloride selected as a zirconium source, 1,4-terephthalic acid or biphenyl-4,4'-dicarboxylic acid as an organic ligand and DMF (N,N-dimethylformamide) as a solvent, a MOF (metal organic framework) material with network topology is synthesized with a solvothermal method, the solid acid catalyst based on zirconia is obtained by calcination in air atmosphere and acidification by strong acid. The catalyst has higher alkylation conversion rate, PXE (1-phenyl-1-xylylethane) yield and reusability at high temperature and under normal pressure.

The invention provides a europium-terbium co-doped luminescent material. The material comprises one or more of the chemical compound as shown in the formula I, hydrates of the chemical compound as shown in the formula I and solvated compounds of the chemical compound as shown in the formula I, and the formula I is shown as Zn8 (Adenine)4(BPDA)6O EuxTb1-x I, wherein x is greater than 0.1 and less than 0.25, Adenine refers to adenine, and BPDA refers to 4,4'-biphenyldicarboxylic acid. Metal-organic frameworks with a porous structure serve as carriers, and the europium-terbium co-doped luminescent porous material is obtained through ion exchange with europium terbium rare earth. The co-doped luminescent porous material can efficiently transfer energy from terbium to europium, so that the material has changes of ratio fluorescence to a bacillus anthraci biomarker, and reduces possible measuring errors caused by changes of single fluorescence intensity. Moreover, the co-doped luminescent porous material can further concentrate molecules of the bacillus anthraci biomarker in the environment, and improve the detection limit of the bacillus anthraci biomarker.

The invention discloses a preparation method of superhydrophobic oil-water separation membrane. The membrane has excellent oil-water separation effect, and can quickly separate oil-water mixture, andhas no pollution to the environment and good tolerance, and can be recycled. Polydiformyl biphthalate p-phenylenediamine (BPPAA) can be obtained by reacting biphenyltetracarboxylic dianhydride (BPDA)and p-phenylenediamine (PDA) as monomers at -5 DEG C for 12 hours. The polymer is a precursor for synthesizing high molecular weight polyimide (PI), and a PAA nanofiber membrane is prepared by an electrospinning technique and imidized at 300 DEG C to form a PI membrane. The layer-by-layer self-assembly of the PI membrane is performed by using ferric chloride (FeCI3) and phytic acid (PA) for initially modifying the PI membrane, and then trimethoxyoctadecylsilane (TMOS) is used for the modification of the membrane to obtain the core material. Various analytical testing methods are used for characterizing the material, and the efficacy of the super-hydrophobic oil-water separation membrane can be verified.

The invention discloses a bis-[tri-(2-methyl-2-phenyl) tin propyl] 2, 2'-biphenyldicarboxylic acid ester complex, a method for preparing the same and application of the bis-[tri-(2-methyl-2-phenyl) tin propyl] 2, 2'-biphenyldicarboxylic acid ester complex. A structural formula of the bis-[tri-(2-methyl-2-phenyl) tin propyl] 2, 2'-biphenyldicarboxylic acid ester complex is shown. The bis-[tri-(2-methyl-2-phenyl) tin propyl] 2, 2'-biphenyldicarboxylic acid ester complex can be applied to preparing antitumor medicines.

The invention provides a preparation method of an MOF (metal-organic framework)-derived cobalt / carbon nanocomposite. The method comprises the following steps: dissolving biphenyl-4,4'-dicarboxylic acid or trimesic acid in an aqueous solution containing potassium hydroxide or sodium hydroxide, adding an aqueous solution of a soluble cobalt salt, performing mixing and stirring at room temperature for a reaction, and performing centrifugal washing and drying to obtain a cobalt-based MOF precursor; calcining the obtained precursor in a nitrogen or argon atmosphere to obtain the cobalt / carbon nanocomposite. The preparation method of the cobalt-based MOF precursor has the advantages of being operated at room temperature, saving energy, adopting water as a solvent and being environmentally friendly; the synthesized magnetic cobalt / carbon nanocomposite has excellent selective adsorption capacity on triphenylmethane dyes and can be separated simply and rapidly by means of the magnetism.

The invention relates to a new process for preparing telmisartan, which uses 2-n-propyl-4-methyl-6-(1'-methylbenzimidazol-2'-yl)-benzimidazole and 4' -Bromomethyl-biphenyl-2-carboxylate alkyl ester or 4'-bromomethyl-biphenyl-2-carbonitrile undergoes a one-step reaction to complete the two-step synthesis reaction of condensation and hydrolysis to directly obtain Telmisartan. Compared with other processes, it has the advantages of solving the technical difficulties of industrial production, simple operation, green synthesis, high purity of telmisartan, high yield and low cost, and has been successfully applied in industrial production.

The invention relates to a chiral coordination compound self-immobilization type catalyst based on salen (Ni) as well as a preparation method thereof and an application to catalytic olefin epoxidation. The self-immobilization type catalyst consists of pyridine functionalized Schiff base complex salen (Ni), 4,4-biphenyl dimethyl acid ions and nickel ions and is prepared by a solvothermal method. The catalyst has the advantages that the preparation is simple, the olefin epoxidation such as styrene, beta-vinyltoluene, cyclohexene and the like can be catalyzed at higher activity and higher selectivity, the separation of the catalyst and products is simple, and the catalyst can be cyclically used for many times.

The invention discloses an energetic type metal-organic framework material and a preparation method thereof. The complex consists of five metal ions Co(II), four 2,2'- binitro-4, 4'-biphenyldicarboxylic acid ligands, six coordinated water, two hydroxyls and sixteen crystal water. The preparation method for the energetic type metal-organic framework material comprises the following steps: adding the ligands into H2O, regulating the pH by use of LiOH, then, adding Co(NO3)2.6H2O, sufficiently stirring, placing into a stainless steel reaction kettle with a polytetrafluoroethylene lining; heating the stainless steel reaction kettle to 150 DEG C in a programmed manner and keeping the temperature for 48 hours, cooling the stainless steel reaction kettle to the room temperature in the programmed manner, leaving purple pink cubic crystal particles on the lining wall, filtering, washing and drying in the air to obtain the complex. The brisance and the work capability of the energetic material prepared by the preparation method are improved.

The invention discloses a processing method of a multifunctional environment-friendly polyvinyl chloride composite decorative material, comprising the following steps of: preparing mixed slurry; mixing and evenly stirring an environment-friendly plasticizer and polyvinyl chloride paste resin; then adding nano calcium carbonate, ultrafine carbon fiber, an environment-friendly viscosity dropping agent and an environment-friendly stabilizing agent and evenly stirring to prepare scraping slurry; and then preparing a base material through a release paper processing technique. An environment-friendly plasticizer mixture is used to replace dioctyl phthalate (DOP) used in the prior art, compact honeycomb structures in the middle layer of the main raw material polyvinyl chloride paste resin are formed by adopting an environment-friendly assistant, the nano calcium carbonate and carbon fiber padding and the multifunctional environment-friendly polyvinyl chloride composite decorative material isprepared through post-processing techniques.

The invention discloses a making method of [Zn (C14H8O4) .H2O] as catalyst of aliphatic polycarbonate under indoor temperature, which is characterized by the following: copolymerizing carbon dioxide and epoxy cyclohexane at 60-100 deg. c under 2. 0-4. 5Mpa or reacting 2, 2'-diphenyl diformic acid and zinc acetate to produce the catalyst with molecular weight at 120, 000-160, 000 and Tg between 112 and 115; making the alternate copolymerizing rate more than 95% and catalyzing rate to 653 polymer / g zinc.

The invention discloses a rare earth metal organic framework material, which has a chemical formula: {[(CH3)2NH2][Eu4(FDA)7(DMF)2.0.5DMF]}n. A preparation method of the framework material comprises the following steps: (1) respectively dissolving organic ligands H2FDA and 4,4'-diphenyldicarboxylic acid in N,N-dimethylformamide solvent; (2) dissolving Eu(NO3)3.6H2O in a N,N-dimethylformamide solvent containing nitric acid; (3) mixing the above two solutions, placing the mixture into a sealed hydrothermal reaction kettle, carrying out a reaction at a constant temperature for 72 hours, separatingsolids from products which are taken out from the reaction kettle; and (4) washing the solids for a plurality of times with N,N-dimethylformamide to obtain a colorless block-shaped crystal. The abstract drawings are three-dimensional structural drawings of the framework material. The preparation method of the framework material is simple and convenient in synthesis, easy to implement, high in yield, low in cost, good in reproducibility, stable in water and stable in solvents. The framework material can be used to detect the presence of Cr(VI) ions in water by fluorescence quenching effects.

The invention provides a method for synthesizing 4,4'-diphenic acid. In the method, high-boiling-point polyethylene glycol 400 is used as a solvent, cuprous iodide (CuI) is used as a catalyst, and 4,4'-diphenic acid is obtained in the condition of presence of diethylenediamine and potassium hydroxide (KOH) by a reduction coupling new method. The synthesis method has the advantages that the method for synthesizing 4,4'-diphenic acid is simple, the synthesizing condition requirements are not high, the operation is easy, the production cost is low, the yield is very high, the purity is also very high and the repeatability is good, so that the method is suitable for the requirements of large-scale industrialized production; the solvent polyethylene glycol 400 used by the reaction system has high steam pressure, does not pollute the environment and is environment-friendly; and the purification method is simple, column separation purification is not needed, and purification can be carried out just by a common recrystallization method.

The invention belongs to the technical field of resin production, and particularly relates to a polyester resin for an anti-yellowing HAA (N,N,N',N'-tetra(Beta-hydroxyethyl)adipamide) system and further relates to a preparation method and application of the polyester resin. The anti-yellowing HAA system provided by the invention is polymerized by using pyromellitic dianhydride, 1,6-hexanediamine,isophthalic acid, phloroglucinol formic acid, ethanetricarboxylic acid monoester, 2,5-dihydroxy hexane, neopentyl glycol and 2,2'-diphenic acid. Because a polyimide chain is carried in the molecular chain of the polyester resin obtained by the materials and a specific process, the high temperature-resistant and anti-yellowing properties are excellent; moreover, because the materials containing phenolic hydroxyl groups, such as phloroglucinol formic acid and ethanetricarboxylic acid monoester, are used for participating in reaction and the phenolic functional group with high anti-yellowing capability is contained in the polyester chain, the polyester product has excellent high temperature-resistant and anti-yellowing properties, and is ultimately used in the powder paint of the HAA system,so that a coated panel with excellent anti-yellowing property can be obtained.

The invention relates to the technical field of light industrial and chemical materials, especially to a metal organic framework material capable of emitting white light, and a synthetic method and application thereof. The synthetic method comprises the following steps: step 1, preparation of an intermediate 2',5'-difluoro-[1,1':4',1''-terphenyl]-4,4''-dimethyl ester; step 2, preparation of an intermediate 2',5'-dimethylthio-[1,1':4',1''-terphenyl]-4,4''-dimethyl ester; step 3, preparation of a thioether functionalized ligand 2',5'-dimethylthio-[1,1':4',1''-terphenyl]-4,4''-dicarboxylic acid; step 4, synthesis of the metal organic framework material capable of emitting white light; and step 5, ultraviolet excitation. The prepared metal organic framework material capable of emitting white light is a colorless transparent rod-like crystal which can emit purely white light and has the advantages of great white light emitting intensity and stable luminescence properties.

The invention discloses a preparation method of a polyester film with high heat shrinkage. The method comprises steps of: carrying out an esterification reaction on terephthalic acid, 4, 4 '-biphenyldicarboxylic acid and ethylene glycol under the effect of catalyst, and adding a stabilizer to conduct a subsequent polycondensation reaction, so as to obtain a polyester slice; drying and conducting melt extrusion on the polyester slice at 265-285 DEG C, and subjecting the polyester slice to a vertical and horizontal two-way stretch with stretching ratio of 3.0-4.5:1 at 80-115 DEG C; and finally shaping to prepare a polyester film with single-layer structure and high heat shrinkage. According to the invention, polyester is subjected to drying, extrusion, stretching and shaping to prepare the polyester film with high heat shrinkage; and compared with a conventional polyester film prepared under same conditions, the polyester film provided by the invention has good heat shrinkage effect, and good heat resistance.

The invention provides a sulfonic acid functionalized zirconium-based metal organic framework material and a preparation method and application thereof. The chemical formula of the metal organic framework material is Zr6O4(OH)4(C16H12O10S2)6. An aromatic carboxylic acid organic ligand containing sulfonic acid functional groups in the metal organic matrix material makes the metal organic frameworkmaterial have higher proton conductivity and better thermal stability. The preparation method comprises the steps that 2,2'-dimercaptopyl-4,4'-dicarboxylic acid is utilized as a sulfhydryl functionalized aromatic carboxylic acid ligand, the sulfhydryl groups are oxidized into sulfonic acid groups by utilizing a post-synthesis oxidation method, and a polysulfonic acid group functionalized zirconium-based metal organic framework material is obtained. Under the temperature of 80 DEG C and the relative humidity of 70% or below, the proton conductivity of the material is 1.11 * 10<-5> to 1.48 * 10<-5>S cm<-1>; and thermal analysis and varying temperature XRD indicate that the material shows obvious weightlessness and structure collapse at 450 DEG C or above and can keep structural stability at200 DEG C or below.

The invention discloses three europium-terbium co-doped fluorescent probes based on different carboxylic acid ligands and application of a film in temperature sensing. The three probes all have excellent yellow fluorescence properties at normal temperature. The probe 1 is [Eu0. 0143Tb0. 9857 (OBA) (H2O) Cl], and OBA represents 4, 4'-dicarboxyl diphenyl ether radicals without protons on two carboxyl groups. The probe 2 is [Eu0.0167Tb0.0.0.9833 (BDC) (H2O) Cl], and BDC represents terephthalic acid radicals of which two carboxyl groups lose protons. The probe 3 is [PMI] 2 [Eu0.0012Tb0.9988 (BPDC)3Cl2], PMI represents 1-propyl-3-methylimidazole monovalent cations, and BPDC represents 4, 4'-biphenyl dicarboxylate with two carboxyl groups losing protons. When the temperature rises from 25 DEG Cto 200 DEG C, the fluorescence of the probe 1 gradually changes from yellow to green, the fluorescence of the probe 2 gradually changes from yellow to red, and the fluorescence of the probe 3 gradually changes from yellow to red and is finally completely quenched. When the temperature is reduced from 200 DEG C to 25 DEG C, the fluorescence of the probe 1 is recovered from green to yellow, and thefluorescence of the probe 2 is recovered from red to yellow; the fluorescence of the probe 3 is recovered from quenching to yellow. And the sensing film based on the three probes can be used for a visual temperature sensor.

The invention discloses a mixed ligand-based zinc (II) complex and a preparation method thereof. The method comprises the following step: preparing colorless lump crystal from zinc nitrate hexahydrate, sodium azide, 4-cyanopyridine and 2,2'-diphenyldicarboxylic acid in secondary deionized water by hydrothermal in situ reaction, wherein the molar ratio of zinc nitrate hexahydrate to sodium azide to 4-cyanopyridine to 2,2'-diphenyldicarboxylic acid is 2:2:2:1; the reaction medium is secondary deionized water; the specific steps are as follows: reacting at constant temperature of 180 DEG C for 3 days, then cooling to room temperature, filtering, washing and drying to obtain the colorless lump crystal; the chemical formula is Zn<2>(PTZ)<2>(DPA)(H<2>O)<2>; PTZ is 5-(4-pyridine) tetrazole monovalent anion obtained from sodium azide and 4-cyanopyridine by [2+3] in situ reaction under the hydrothermal condition; DPA is divalent anion of 2,2'-diphenyldicarboxylic acid. The complex belongs to a functional coordination complex, has a novel two-dimensional layer structure, is good in thermal stability, and can be further developed and applied as a molecular-based light-emitting material. The preparation method disclosed by the invention is simple and available in raw material.

The invention discloses a preparation method of humic acid layer sheet-based bimetal MoFs composite powder; the method comprises the following steps of 1, dissolving sodium humate in deionized water,and carrying out filtering to obtain a suspension liquid A; 2, adding nickel nitrate hexahydrate and cobalt nitrate hexahydrate into deionized water to obtain a solution B; 3, mixing the suspension liquid A with the solution B, carrying out ultrasonic treatment, then carrying out hydro-thermal reaction, and carrying out ultrasonic treatment to obtain a suspension liquid C; 4, enabling 4, 4'-biphenyldicarboxylic acid into deionized water, and dropwise adding a sodium hydroxide water solution to obtain a solution D; 5, dropwise adding the solution D into the suspension liquid C, and carrying outhydrothermal reaction; and 6, cooling the product to room temperature, carrying out centrifugally separating and drying to obtain the humic acid layer sheet-based bimetal MoFs composite powder. According to the humic acid layer sheet-based bimetal MoFs composite powder prepared by the preparation method, MoFs grows on the humic acid layer sheet in a two-dimensional nanosheet form, and when the composite powder is used as an electrode material, the composite powder has high specific capacitance, high rate characteristic and relatively high cycling stability.

The invention discloses a vanadium-free denitration catalyst, wherein a CeO2 nanosheet is used as a matrix, and transition metal elements are uniformly incorporated into a CeO2 lattice. A preparationmethod of the vanadium-free denitration catalyst is further disclosed. The method includes: conducting chelation reaction in a water and ethanol mixed solution with cerium oxide as a main body, the transition metal elements as a dopant, a common alkali metal solution as a regulator and phthalic acid, biphenyldicarbox ylic acid, trimesic acid, pyromellitic acid or the like as a ligand; drying a product of the chelation reaction, calcining the product for 2-5h at the temperature of 400-700DEG C to obtain the vanadium-free denitration catalyst. The method has the advantages of being simple in production process, capable of obtaining raw materials easily and easy to industrialize, adopting non-toxic harmless components and being harmless to the environment and human health. The vanadium-free denitration catalyst prepared by the method has wide catalytic activity temperature window and high catalytic efficiency, and can be used for denitration of both fixed source industry and mobile sourceexhaust gas.

The invention discloses an MOFs composite material containing heteropolyacid and a transition metal complex as well as a preparation method and an application thereof. The preparation method comprisesthe following steps: in the presence of an organic solvent N,N'-dimethylformamide, dissolving and heating metal zirconium salt, adding 4,4'-biphenyldicarboxylic acid, a platinum metal organic ligand,a mineralizing agent benzoic acid and heteropolyacid, mixing and stirring all the components, and carrying out hydrothermal reaction for a period of time, thereby obtaining the material. The MOFs composite material containing the heteropolyacid and the transition metal complex is obtained for the first time, and can be applied to the fields of gas adsorption, separation and storage, heterogeneouscatalysis and the like.