170 results about "Aminotroponiminate" patented technology

The invention relates to a novel ZnIn2S4 / NH2-MIL-125(Ti) composite visible-light catalyst and belongs to the technical field of photocatalysis. The novel ZnIn2S4 / NH2-MIL-125(Ti) composite visible-light catalyst is characterized in that ZnIn2S4 is nanosheet-shaped and is uniformly distributed on the surface of lumpy NH2-MIL-125(Ti), and the mass percent of the NH2-MIL-125(Ti) is 20.0% to 6.0%. A preparation method comprises the steps: (1) dissolving a certain amount of tetrabutyl titanate and 2-amino terephthalic acid in a mixture solution of N,N-dimethylformamide and methanol, and carrying out a crystallizing reaction for 48 hours in an autoclave at the temperature of 150 DEG C, so as to obtain the NH2-MIL-125(Ti); (2) dispersing the synthesized NH2-MIL-125(Ti) into a certain volume of ethanol in an ultrasonic dispersion manner, then, sequentially adding a certain amount of propanetriol, indium chloride, zinc chloride and thioacetamide into the dispersion while carrying out stirring, carrying out a crystallizing reaction for 10 hours in an autoclave at the temperature of 180 DEG C to 200 DEG C so as to obtain a solid product, and subjecting the obtained solid product to filtrating, washing and drying, thereby obtaining the ZnIn2S4 / NH2-MIL-125(Ti) composite visible-light catalyst. The preparation method of the composite visible-light catalyst is environmentally-friendly and is simple in process. The prepared composite catalyst has very high visible-light catalytic activity and has a potential application value in photocatalytic hydrogen production using solar energy.

The invention belongs to the field of environment pollution treatment, and more specifically relates to a preparation method and applications of a nanometer titanium dioxide @ Fe-based MOF visible light composite catalyst. The preparation method comprises following steps: a ferric iron salt, 2-amino terephthalic acid, and nanometer TiO2 are added into N, N-dimethyl formamide, ultrasonic uniform dispersion treatment is carried out so as to obtain a precursor solution; the precursor solution is subjected to hydro-thermal reaction so as to obtain the nanometer titanium dioxide @ Fe-based MOF visible light composite catalyst. Under sun light effect, the nanometer titanium dioxide @ Fe-based MOF visible light composite catalyst is capable of realizing high efficiency reduction of Cr(VI) under mild neutral conditions, efficiency is high, energy consumption is low, and the nanometer titanium dioxide @ Fe-based MOF visible light composite catalyst is widely suitable for processing of a plurality of chromium containing waste water.

The invention provides an in-situ preparation method and application of an Ag / AgCl / NH2-MIL-101(Fe) composite photocatalyst with a spindle appearance, and belongs to the technical field of environmental pollution improvement. The in-situ preparation method comprises the following steps: preparing a NH2-MIL-101(Fe) nanometer material with a regular hexagon-shaped section and a spindle appearance according to a solvothermal method by taking FeCl3.6H2O and 2-amino-terephthalic acid as raw materials, wherein the average length of the edges of the nanometer material is about 700 nm, and the average length of the sides of the regular hexagon-shaped cross section is about 200 nm; preparing the Ag / AgCl / NH2-MIL-101(Fe) composite photocatalyst with the spindle appearance in situ according to an ultraviolet light reduction method. According to the method, the reaction between Cl- in the NH2-MIL-101(Fe) nanometer material and Ag+ in a silver nitrate solution, and the reducing action of ultraviolet light are utilized, and no other exogenous chlorine source is added, so that the in-situ preparation method is simple, convenient, and mild in condition; Ag / AgCl nano-particles are loaded on the NH2-MIL-101(Fe) nanometer material; electron transfer efficiency is further improved via the surface plasma resonance effect, so that the recombination probability of photogenerated electron-hole pairs is reduced, and gaseous pollutants are effectively degraded.

The invention relates to the technical field of electrocatalysts, and provides a preparation method of a cobalt sulfide doped nanoporous carbon electrocatalyst. The preparation method comprises the steps of mixing 2-aminoterephthalic acid, water-soluble aluminum salt and an organic solvent for the first time and then electrospinning to obtain a spun film; drying the spun film to obtain nitrogen-doped aluminum metal MOFs; mixing thiourea, water-soluble cobalt salt, an ethanol aqueous solution and n-hexane for the second time to obtain a mixed solution; carrying out two-phase interface coating on the nitrogen-doped aluminum metal MOFs and the mixed solution, and carrying out solid-liquid separation to obtain nitrogen-sulfur doped cobalt-aluminum bimetallic MOFs; pyrolyzing the nitrogen-sulfur doped cobalt-aluminum bimetallic MOFs in the N2 atmosphere to obtain the cobalt sulfide doped nanoporous carbon electrocatalyst. The cobalt sulfide doped nanoporous carbon electrocatalyst prepared by the method has excellent electrocatalytic activity and durability.

The invention provides a preparation method of a functionalized carbon material based on Schiff base-MOF. 2-aminoterephthalic acid and transition metal salt are taken as initial materials and firstlysubjected to a hydrothermal reaction to produce a metal-organic framework compound, the metal-organic framework compound reacts with amino acid or salicylaldehyde derivatives to produce a Schiff baseprecursor, finally, high-temperature carbonization is performed, and the nitrogen-doped functionalized carbon material is obtained. The carbon material is applied to an electrocatalytic cathode ORR (oxygen reduction reaction) and a water electrolysis OER (oxygen evolution reaction), has catalytic activity equivalent to that of 20wt% of commercial Pt / C and shows excellent methanol tolerance, good conductivity and durable stability. The raw materials contain no precious metal and have low cost, the preparation method is simple and easy to control and operate, and the functionalized carbon material has good application prospects as a cathode catalyst of fuel cells.

The invention discloses a modified zirconium-based organic metal framework adsorbent for adsorbing lead ions as well as a preparation method and application of the modified zirconium-based organic metal framework adsorbent. The method comprises the following steps: reacting 2-aminoterephthalic acid, zirconium tetrachloride and hydrochloric acid in N, N-dimethylformamide to obtain a product UiO-66-NH<2>, then reacting the product UiO-66-NH<2> with glutaraldehyde to obtain a product UiO-66-GD, and reacting UiO-66-GD with 6-amino-2-thiouracil to obtain the modified zirconium-based organic metal framework adsorbent UiO-66-ATA. The method is simple to operate, the preparation method is simple, raw materials and reagents are cheap and easy to obtain, the obtained metal organic framework can be compatible with various functional groups, has ultrahigh specific surface area and permanent porosity, has high selectivity and high flux adsorption effect on lead ions, a novel efficient adsorption material is provided for lead-containing sewage treatment, and a new method is provided for design and synthesis of the novel adsorption material.

The invention relates to a preparation method and application of a metal organic framework material, and belongs to the technical field of crystalline materials. Under the condition that the temperature is not higher than 40 DEG C, zirconium tetrachloride, hafnium tetrachloride and 2-amino terephthalic acid are dissolved in a mixed organic phase to obtain a mixed solution A, wherein the mixed organic phase is an organic mixture of N,N-dimethylformamide and acetic acid; at the temperature of 100-120 DEG C, the mixed solution A reacts for 12-24 h under the stirring condition, the product is filtered, washed with N,N-dimethyl formamide and subjected to vacuum drying, and then the metal organic framework material is obtained. The metal organic framework material prepared through the method can be used for adsorbing carbon dioxide (CO2) and has the advantages of being high in adsorption rate and capable of being repeatedly used.

The invention discloses a preparation method of a hollow porous TiO2 nanocubic material. The method firstly mixes titanium isopropoxide and methanol, adds into a mixture of 2-aminoterephthalic acid and N,N-dimethylformamide for a reaction, obtains an amino-modified Ti-MIL-125 nanocube material, conducts stirring for the reaction after water, sodium hydroxide and absolute ethanol are added, obtainsa nano-precursor material, and finally conducts heat-treating to obtain the hollow porous TiO2 nanocubic material; the invention discloses application of the hollow porous TiO2 nanocubic material ina lithium ion battery. The method utilizes the characteristics that acidic ligands constituting the amino-modified Ti-MIL-125 nanometer material are not stable under the alkaline condition to conductself-etching, thereby ensuring the stability of the structure and performance; the hollow porous TiO2 nanocubic material is applied to the lithium ion battery to increase the specific capacity of thelithium ion battery.

The invention relates to a preparation method of a mixed-phase titanium dioxide visible-light-induced photocatalyst derived from MOF. The preparation method comprises the following steps: dissolving 2-aminoterephthalic acid and titanium isopropoxide in a mixed solvent of N,N-dimethylformamide (DMF) and absolute methanol, transferring the obtained mixture into a high-pressure kettle, and keeping the temperature at 150 DEG C for 48 hours to prepare NH2-MIL-125; calcining the prepared NH2-MIL-125 at a high temperature under the protection of nitrogen so as to obtain the visible-light-induced photocatalyst. The preparation method has the beneficial effects that the preparation method is simple, the preparation conditions are easy to control, and the feasibility is high. The prepared MOF-derived mixed-phase titanium dioxide visible-light-induced photocatalyst is relatively good in photocatalytic degradation efficiency under visible light, and has a certain application prospect.

The invention discloses a preparation method and application of an organic phosphine grafted hollow metal organic framework material. The preparation method comprises the following steps: firstly, letting 2-aminoterephthalic acid react with zirconium tetrachloride to obtain a zirconium organic framework material with amino, then obtaining a hollow zirconium organic framework material through a metal-acid assisted etching method, and finally grafting organic phosphine DOPO through a Kabachnik-Fiels reaction. The synergistic effect among metal, hollow and organic phosphine in the organic phosphine grafted hollow zirconium metal organic framework material greatly enhances the flame retardancy and smoke suppression performance of the high polymer material; due to the existence of the organic ligand, the compatibility of a flame retardant and a polymer matrix is improved, and compared with other metal-based flame retardants, the flame-retardant polymer composite material has excellent flameretardancy and good mechanical properties.

The invention relates to a cellulose / UiO-66-NH2 porous material capable of degrading an organophosphate biochemical toxic agent and a preparation method thereof. Cellulose is used as a substrate and is blended with a silane coupling agent, and then compounding in situ is carried out in order to obtain UiO-66-NH2. The preparation method comprises the following steps: a silane coupling agent is added into a cellulose suspension, in order to obtain a cellulose-hydrolyzed silane coupling agent suspension; cooling in liquid nitrogen is carried out in order to obtain an ice gel; freeze-drying is carried out, and after baking, a cellulose porous material is obtained; the material is added into a mixed solution of zirconium ions, 2-aminoterephthalic acid, hydrochloric acid and N, N-dimethylformamide, and synthesis in situ is carried out; washing, solvent exchange, vacuum drying, and atmospheric drying are carried out in order to obtain the product. The cellulose / UiO-66-NH2 porous material canbe used for catalytically degrading the G series biochemical toxic agent in a N-ethylmorpholine buffer solution at room temperature, and the product has good mechanical properties, and potential application prospects in the fields of catalysis, environmental protection and the like.

The invention provides a preparation method of a cationic metal-organic framework membrane material, and belongs to the field of metal-organic framework materials. A metal-organic framework material UiO-66-NH2 is prepared from aminoterephthalic acid and metalklic zirconium, and then a UiO-66-NH2 membrane is prepared from granular UiO-66-NH2 and polyvinylidene fluoride by adopting a mixed matrix process; and amino groups of the UiO-66-NH2 membrane are quaternized with methyl trifluoromethanesulfonate, and finally the quaternized UiO-66-NH2 membrane is acidized to form the cationic UiO-66-NMe<3+> membrane with an anion exchange group. The UiO-66-NMe<3+> material in the membrane form retains the efficient selective adsorbability of the metal-organic framework material, can be conveniently separated from an aqueous solution, and has a good application prospect in removal and enrichment of anionic pollutants in water.

The invention discloses a ternary metal organic framework sterilizing material and a preparation method and application thereof. The method comprises the following steps: taking a solvent as a reaction medium, uniformly mixing nickel acetate, cobalt acetate, ferrous acetate and 2-aminoterephthalic acid, and reacting for 1-3 hours at room temperature to obtain the nano flower-shaped ternary metal organic framework sterilizing material. The ternary metal organic framework sterilizing material disclosed by the invention is in a nano flower shape, has a good sterilizing effect, and has dual effects of direct sterilization of nickel, cobalt and iron and decomposition catalytic sterilization of H2O2. Compared with the prior art, the ternary metal organic framework sterilizing material disclosedby the invention combines a metal organic framework and heterogeneous Fenton-like reaction to achieve the aim of efficient synergistic sterilization, and the dosage of the sterilizing material and H2O2 is effectively reduced, so that the toxic and side effects are reduced, and the utilization rate of the sterilizing material and H2O2 is improved.

The invention discloses a modified carbon nitride / Fe-based MOF composite material and a preparation method and application thereof in the field of photocatalysis. The preparation method comprises thefollowing steps: (1) uniformly mixing melamine and triaminopyrimidine according to a molar ratio of 1:(2-4), performing roasting at 450-550 DEG C in an inert atmosphere, grinding the obtained product,adding the ground product into dimethyl sulfoxide, performing ultrasonic stripping for 1-3 hours, performing centrifuging with distilled water, performing washing and drying to obtain modified carbonnitride powder; and (2) dispersing the modified carbon nitride powder obtained in the step (1) into N, N-dimethylformamide; dissolving carbon nitride in N, N-dimethylformamide to form dispersion liquid, adding the dispersion liquid into an N, N-dimethylformamide solution containing ferric chloride, terephthalic acid and aminoterephthalic acid to uniformly mixing, and carrying out solvothermal reaction at 140-160 DEG C for 14-16 hours to obtain the modified carbon nitride / Fe-based MOF composite material.

The preparation method comprises the following steps: taking foamed nickel with high conductivity as a substrate, firstly, growing a precursor material with a layered arrangement structure of Co2 (OH) 3Cl on the foamed nickel through a solvothermal method; then adding o-aminoterephthalic acid and the like as ligands, and carrying out ligand conversion reaction through a solvothermal method to synthesize the metal organic framework (MOF) nanosheet CoMOFNH2 with an ultrathin structure; and finally, carrying out controllable heat treatment in an inert atmosphere at a high temperature to obtain the porous nanosheet Co3O4 / NC with efficient OER catalytic performance. In 1M KOH electrolysis, Co3O4 / NC only needs overpotentials of 235mV and 264mV to reach current densities of 10mA / cm < 2 > and 100mA / cm < 2 >, the Tafel slope is only 80mV / dec, and the performance is still kept stable after long-time use.

The invention relates to a preparation method of 3, 5-diaminobenzoic acid, which is characterized in that: the 3, 5-dinitrobenzoic acid is taken as raw material, carbinol or ethanol as a solvent, and added with a catalyst; a reduction reaction is carried out between the 3, 5-dinitrobenzoic and hydrogen of theoretical reacting weight for 2-10 hours under the reaction pressure of 0.1 MPa to 5MPa as well as the reaction temperature of 20 DEG C to 150 DEG C, thereby obtaining crude product; the crude product is separated and removed off the solvent to obtain the 3, 5-diaminobenzoic acid product, wherein, the dosage ratio of materials is calculated on the basis of 1mol of 3, 5-dinitrobenzoic acid, the dosage of the carbinol or ethanol is 200ml to 1000ml, and the dosage of the catalyst is 0.5 percent to 10 percent of the weight of the 3, 5-dinitrobenzoic acid; the catalyst is either Raney nickel or an active carbon carrier. The method has short technological line, product purity up to 95 percent and yield rate over 96 percent and causes no 'three wastes' (waste gas, waste water and waste residues) pollution and the catalyst can be recovered for later use.

The invention discloses a preparation method of a graphite felt loaded metal organic framework compound cathode material and an application thereof. The method comprises the following steps: employingferric salt, Pluronic F127, weak acid, 2-aminoterephthalic acid and a carbon felt, adding ferric salt and Pluronic F127 into deionized water; stirring, then adding the weak acid and the 2-aminoterephthalic acid according to the molar ratio, stirring to obtain a metal organic framework compound precursor solution, putting the metal organic framework compound precursor solution and the pretreated carbon felt into a reaction kettle together, sealing, then carrying out a hydrothermal reaction, washing and carrying out vacuum drying to obtain the cathode material. The cathode material has a porousstructure and a large specific surface area, and the yield of H2O2 is remarkably increased when the cathode material is applied to an electro-Fenton system. The oxygen is not required to be filled, aeration is performed or a Fenton reaction reagent is not required to be added in the reaction process, so that the method has a relatively wide pH application range and relatively high acid stability,and almost no iron-based sludge is generated.

The invention discloses a nanometer zinc oxide photocatalyst and a preparation method and an application thereof. According to the key point of the technical scheme, the nanometer zinc oxide photocatalyst is prepared by the following steps: reacting zinc salt with organic ligands in a N,N-dimethylformamide solvent at room temperature, so as to form a Zn(II) precursor and then performing calcination at the temperature of 400 to 800 DEG C, wherein the molar mass ratio of zinc salt (n) to organic ligands (n) is (0.5-2) to 1, the zinc salt is Zn(NO3)2.6H2O, and the organic ligands include at least one of 1,3,5-trimesic acid, terephthalic acid, isophthalic acid, phthalic acid, formic acid and 4,4',4''-s-triazine-1,3,5-three-para aminobenzoic acid. The invention further discloses the preparation method of the catalyst and the application of the catalyst to processing of organic waste water containing rhodamine B. The nanometer zinc oxide photocatalyst has the advantages of environmental friendliness, simple preparation process, strong innovativeness and practicability and the like.

The invention discloses preparation and application of an amino-functionalized MOFs material. According to the invention, iron salt and 2-aminoterephthalic acid (H2ATA) are taken as raw materials, and a mild solvothermal method is adopted for synthesizing the amino-functionalized MOFs material (NH2-MIL-53(Fe)). The prepared amino-functionalized MOFs material shows good catalytic activity, selectivity and activity stability in H2S selective catalytic oxidation reaction and is more excellent than MIL-53(Fe) carrying no amino, traditional Fe2O3 and activated carbon. According to the invention, the amino-functionalized MOFs material is applied to H2S selective oxidation for the first time, so that the application field of the MOFs material is expanded, and an experimental basis is provided for the design and development of a novel H2S selective catalyst.

The invention belongs to the field of solid composite catalysts, and provides a C3N4-supported acid / alkali bifunctional metal organic framework (MOFs) based composite catalyst, and a preparation method and an application thereof. The preparation method comprises the steps of: 1) dissolving carbon nitride and dopamine hydrochloride in a trihydroxymethyl-aminomethane buffer solution prepared before,performing a stirring reaction, and filtering, washing and drying a reaction product after the reaction is finished to prepare C3N4@PDA; 2) dissolving a zirconium salt, 2-aminoterephthalic acid and mono-sodium 2-sulfuric terephthalate in a weak-acid solution and performing ultrasonic dispersion, adding the C3N4@PDA to the mixture system, and performing vibrating mixing and a water bath reaction;3) centrifugally collecting and washing the reaction product; and 4) filtering and vacuum-drying the product to prepare the C3N4-suppported acid / alkali bifunctional MOFs-based composite catalyst, which has a porous structure and large specific surface area, and has beneficial to adsorption of glucose molecules, thus improving isomerization process and dehydration reaction.

The invention provides a preparation method of a TiO2 (at) MOF heterojunction photocatalyst with a hollow frame morphology. The preparation method comprises the following steps: dissolving tetraisopropyl titanate and 2-aminoterephthalic acid in an organic solvent, then transferring a mixture into a reaction kettle, carrying out a heating reaction for a period of time, after the reaction is finished, centrifugally collecting a product, cleaning and drying to obtain an NH2-MIL-125 precursor with a square block structure; dissolving an NH2-MIL-125 precursor and tannic acid in an aqueous solutionto obtain a mixed solution, transferring the mixed solution into a reaction kettle, heating to react for a period of time, centrifugally collecting a product after the reaction is finished, cleaning and drying to obtain the TiO2-MOF heterojunction photocatalyst with the hollow frame morphology. According to the invention, tannic acid is selected as a directional protective agent; NH2-MIL-125 is etched from inside to outside through a hydrolysis method, a TiO2 (at) MOF hollow frame structure with an exposed {100} surface is finally obtained, and the prepared photocatalyst TiO2 (at) MOF has higher photocatalytic activity than pure TiO2 and pure MOF.

The invention provides a preparation method of a blended modified polysulfone charged nanofiltration membrane and the obtained membrane. The preparation method comprises the following steps: under acidic conditions, by taking zirconium chloride and 2-aminoterephthalic acid as raw materials, preparing UiO-66-NH2 and UiO-66-NH<3><+> powder, and preparing a selective machine-made membrane by adoptinga blending method. The technical scheme provided by the invention is adopted, according to the preparation method of the blended modified polysulfone charged nanofiltration membrane, the UiO-66-NH2 and UiO-66-NH<3><+> powder is prepared, and the modified nanofiltration membrane is prepared by adopting a blending method, so that the water flux and the rejection rate of the membrane are improved, and meanwhile, the nanofiltration membrane is endowed with the characteristic of selectively intercepting positive and negative charges. According to the technical scheme, the technology is simple, operation is easy and convenient, no high temperature or high pressure exists in the whole process, and meanwhile the problem that a membrane surface self-assembly modification method is poor in stability can be effectively solved. The nanofiltration membrane prepared in the invention has good stability, also has the function of selectively intercepting and recovering dye, can rapidly separate dye wastewater under low pressure and high concentration, and has very strong tolerance to organic reagents.

The invention discloses an MOF and HrGO co-modified bismuth vanadate electrode as well as a preparation method and application thereof in the field of photoelectrocatalysis, the preparation method comprises the following steps: (1) dissolving bismuth nitrate in nitric acid, then adding ammonium metavanadate and polyvinyl alcohol, and carrying out ultrasonic treatment to obtain a seed solution; smearing the seed solution on a clean conductive glass, drying, calcining, and taking out a product as a substrate electrode for later use; (2) dissolving bismuth nitrate and ammonium metavanadate in nitric acid, putting the substrate electrode prepared in the step (1) into an obtained solution, carrying out hydrothermal reaction,and after the reaction is finished, calcining to obtain a BiVO4 electrode; (3) dissolving 2-aminoterephthalic acid into DMF, dissolving butyl titanate in methanol, mixing obtained two solutions to be uniform through stirring, adding reduced graphene oxide obtained by hydrogen plasma treatment, uniformly mixing, finally adding the BiVO4 electrode, and carrying out solvothermal reaction to obtain the BiVO4 / NH2MIL125-HrGO composite membrane electrode.

The invention relates to an electronic cigarette liquid, a preparation method thereof and a novel acid for preparing a nicotine salt and an electronic cigarette. The electronic cigarette is prepared from the following raw materials in parts by weight: 1 to 5 parts of nicotine, 2 to 10 parts of organic acid and 50 to 300 parts of organic solvent, wherein the organic acid is any one or a mixture ofnicotinic acid, parafluorobenzoic acid and para aminobenzoic acid. The electronic cigarette is prepared through reaction of the nicotine and a specific type of organic acid in the organic solvent. Compared with other existing electronic cigarette liquids, the electronic cigarette liquid disclosed by the invention has the advantages of lower nicotine salt concentration (the content of the nicotineis lower than or equal to 20mg / mL), better smoking feel, unique atomizing effect and smoking feel, and certain health care function.

The invention discloses a preparation method for synthesizing MIL-53(Al)-AO2 on the basis of a metal-organic framework of amidoxime. The preparation method comprises the following steps: 1, dissolving2-aminaterephthalic acid and Al(NO3)3.9H2O into DMF (Dimethyl Formamide) and deionized water to prepare a MIL-53(Al)-NH2 mixture A1; 2, washing impurities in the A1 with DMF and acrylonitrile so as to obtain a solid product A2; 3, adding the A2 into acrylonitrile and Al Cl3 to be fully dissolved so as to obtain a middle product A3; 4, distributing the A3 into a mixed solution of ultrapure water and ethanol, adding K2CO3 and NH2OH.HCl, and reacting to obtain a mixture A4; 5, washing the A4 with ethanol and ultrapure water, performing suction filtration, separating, and performing vacuum drying, so as to obtain the MIL-53(Al)-AO2. The preparation method disclosed by the invention has the beneficial effects that a preparation method of the MIL-53(Al)-AO2 with advantages of being high in yield, simple in equipment and easy to operate and control is provided; a high-efficiency material is provided for extracting uranium from uranium-bearing water.

The invention relates to an impurity analysis method for multiple vitamin preparations. The method comprises the following steps of preparing a test solution of the vitamin preparations; dissolving o-phthalaldehyde and 2-mercaptoethanol based on a mass ratio of 1 to (2-5) in methanol, adding a boric acid buffer solution, and adjusting the pH value to 3-5 to obtain a derivatization reagent; and taking the test solution, adding the derivatization reagent to carry out online derivatization reaction, and injecting the derivatized test solution into a high performance liquid chromatograph, therebydetecting impurities in the test solution. According to the method, folic acid impurity A, folic acid impurity D, p-aminobenzoic acid and 3-aminopropanol in the vitamin preparations can be effectivelydetected; and the method is high in sensitivity and good in specificity.

The invention discloses application of a Fe-based metal organic framework material MIL-101 (Fe)-R% as a combustion catalyst, the Fe-based metal organic framework material is MIL-101 (Fe)-R% and is obtained by synthesizing FeCl3. 6H2O, terephthalic acid and 2-aminoterephthalic acid in an N, N '-dimethylformamide solvent, R is the molar ratio of 2-aminoterephthalic acid ligand to total ligand, and R is 0%-48%. According to the method, a part of thermosensitive ligand NH2-BDC is removed by accurately controlling the pyrolysis temperature, the HP-MIL-101 (Fe) material with controllable concentration of nano active iron oxide is obtained, and Fe2O3 is uniformly dispersed in pores of MOFs and can be used as a combustion catalyst for promoting thermal decomposition of propellant components.

The invention relates to a functionalized metal organic framework nano material, a preparation method and application thereof, and belongs to the technical field of OER electrocatalysts. The preparation method comprises the steps of dissolving 0.1 mmol of organic ligand 2-nitroterephthalic acid or 2-formylamino terephthalic acid and 0.1 mmol of ferric salt in an organic solvent, heating at the temperature of 130-180 DEG C for 2-5 hours, and carrying out hydrothermal reaction to obtain a reaction product; and cooling the obtained reaction product to room temperature, carrying out suction filtration by using an organic microfiltration membrane, washing the suction filtration material by using deionized water and an ethanol organic solvent in sequence, and then drying to obtain the functionalized metal organic framework nano material catalyst Fe-MOFs-X, wherein X=NO2 or NHCHO. According to the invention, nitro and formamido functional groups are introduced into the Fe-based metal organic framework (Fe-MOFs-X) catalyst, so that the Fe-MOFs-X catalyst prepared by the invention has relatively high oxygen evolution electrocatalytic activity and stability in an alkaline environment.

The invention discloses a two-dimensional metal organic framework nanosheet-based capillary gas chromatography column and a preparation method and the application thereof. In an organic solvent, by taking zirconium tetrachloride as a metal source, taking 1,3,5-tri(4-carboxyphenyl)benzene as an organic ligand and taking at least one of formic acid, benzoic acid and p-aminobenzoic acid as an acid regulator, the metal and the organic ligand are self-assembled to form a nanosheet which is activated in vacuum, and then the inner wall of a capillary column is coated with the nanosheet to prepare thecapillary gas chromatography column, so that a substituted benzene isomer mixture can be efficiently separated to show unique para-isomer selectivity, which greatly improves the separation degree bycompared with a commercial column meta / para-substituted benzene structural isomer; baseline separation can be achieved for mixed straight-chain alkane and mixed benzene series; in addition, the nanosheet of a multilayer stack structure is an important reason for efficient separation of the isomers. The capillary gas chromatography column disclosed by the invention has excellent properties of wideapplication range, high selectivity, high thermal stability and the like.