96 results about "Zeolitic imidazolate framework" patented technology

Disclosed herein are manganese doped metal organic frameworks and methods of making and use thereof. For example, disclosed herein is a manganese doped metal organic framework (Mn-MOF) comprising a metal organic framework (MOF) comprising a zeolitic imidazolate framework (ZIF) comprising metal ions connected by imidazolate linkers, wherein the metal ions comprise Mn and Zn. In some examples, the Mn-MOF comprises from greater than 0% to 50% (mol%) Mn based on the total amount of metal ions. Also disclosed herein are methods of making and methods of use of the Mn-MOFs.

Disclosed is a method for catalytic depolymerization of lignin to prepare a monophenolic chemical product using a zeolitic imidazolate framework derivative. The method uses lignin as raw material, a zeolitic imidazolate framework derivative as catalyst, and an organic small molecule alcohol as hydrogen-donating solvent. After inert gas displacement and pressurization to 0.5-3 MPa, the reaction temperature is controlled to be 200-240°C, and stirring is performed for 2-10 h, which can achieve selective depolymerization of lignin without added hydrogen, yielding monophenolic chemical products mainly composed of 4-propyl-2,6-dimethoxyphenol. The method of the present invention is environmentally friendly, has stable performance, has highly efficient catalysis, and is highly selective, realizing selective conversion of lignin into monophenolic chemical products mainly composed of 4-propyl-2,6-dimethoxyphenol under conditions without added hydrogen.

A method of removing hydrogen sulfide from a subterranean geological formation includes mixing a zinc-imidazolate material, ZIF-8, in an amount of 0.1 to 2.5 percent by weight with an organic liquid containing one or more unsaturated oils to form a drilling fluid suspension with a pH of 10 or more. The method includes injecting the drilling fluid suspension in the subterranean geological formation, circulating the drilling fluid suspension in the subterranean geological formation to form an oil-based mud, and scavenging hydrogen sulfide from the subterranean geological formation.

The invention discloses a heat-insulation moisture-proof thermoelectric device and a preparation method thereof, and relates to the technical field of thermoelectric materials, the thermoelectric device comprises a p-type Bi2Te3 galvanic couple arm and an n-type Bi2Te3 galvanic couple arm which are provided with moisture-proof layers on the surfaces and are connected with electrodes; the cellulose-based aerogel layer is filled between the adjacent galvanic couple arms; the porosity of the cellulose-based aerogel layer is 96%-99.5%, and the surface contact angle is larger than or equal to 150 degrees; the heat reflecting film covers the non-heat-conduction surface of the galvanic couple arm, and the reflectivity of the heat reflecting film at the wave band of 400-3000 nm is greater than or equal to 92%; the moisture-proof layer is made of a zinc-based zeolite imidazate framework material, the thickness of the moisture-proof layer is 50-200 nm, the porosity of the moisture-proof layer is 5%-10%, and the pore diameter is smaller than or equal to 0.34 nm. The preparation method of the heat-insulating and moisture-proof thermoelectric device comprises the following steps: S1, carrying out moisture-proof treatment on the galvanic couple arms; s2, filling the cellulose aerogel; s3, packaging a heat reflecting film; and S4, coating the conductive bonding layer. According to the invention, low-resistance, high-strength and moisture-proof connection between the galvanic couple arms and the electrodes is realized.

The invention discloses a pharmaceutical composition, which comprises chlorogenic acid, ferulic acid and a zeolite imidazole framework material, the mass ratio of chlorogenic acid to ferulic acid is 4: 1-1: 4, and the zeolite imidazole framework material is a Zn-based zeolite imidazole framework material. In the composition, the compatibility of chlorogenic acid and ferulic acid can synergistically regulate the proliferation, migration and apoptosis of keratinocytes, and restore the physiological function imbalance of human skin keratinocytes caused by EGFRIs. The ZIF can efficiently carry chlorogenic acid and ferulic acid together, the nanoscale particle size of the ZIF is beneficial to permeation of the medicine into the skin, and hydroxyl on the surface of the ZIF and ceramide in the skin are subjected to hydrogen-bond interaction to retain the medicine at the focus position. The composition preparation disclosed by the invention is good in moisturizing performance and simple and convenient to use, and can be used for effectively treating skin toxic reactions such as pustule type rash, skin dryness and itching, perionychomycosis, abnormal hair regeneration and the like caused by EGFRIs.

A method of removing hydrogen sulfide from a subterranean geological formation includes mixing a zinc-imidazolate material, ZIF-8, in an amount of 0.1 to 2.5 percent by weight with an organic liquid containing one or more unsaturated oils to form a drilling fluid suspension with a pH of 10 or more. The method includes injecting the drilling fluid suspension in the subterranean geological formation, circulating the drilling fluid suspension in the subterranean geological formation to form an oil-based mud, and scavenging hydrogen sulfide from the subterranean geological formation.

The invention relates to a composite membrane of a zeolite imidazate framework (ZIF-71) and a polypropylene (PP) membrane in a metal organic framework, a preparation method of the composite membrane and application of the composite membrane in a non-aqueous flow battery, belongs to the technical field of flow batteries, and provides a ZIF-71 / PP composite membrane which is prepared through different in-situ growth methods and has different surface appearances. The in-situ grown 2-nitroimidazole zinc zeolite imidazate framework layer with different morphologies can effectively prevent active substances from crossing and crossing in the non-aqueous flow battery. In addition, the excellent performance of the non-aqueous flow battery verifies that the composite diaphragm of the metal organic framework and the polypropylene can still keep the structural integrity during long-term operation in an organic medium.

Nanoparticles and formulations for treating prostate cancer in a subject are disclosed. The nanoparticles contain a cage, such as a zeolitic imidazolate framework (“ZIF”), a surface modifying agent, a targeting ligand, and an active agent. The surface modifying ligand is attached to the outer surface of the cage and the targeting ligand is exposed to the surrounding environment. The active agent is encapsulated in the cage. The targeting ligand binds to a reproductive hormone or a receptor of a reproductive hormone. The active agents can be a ribosome inactivating protein, an apoptosis inducer, a hormone, a receptor ligand, or a nucleic acid, or a chemotherapy drug or a combination thereof, that kill and / or reduce or prevent growth or proliferation of gonadotroph cells and / or tumor cells, regulate FSH and / or LH secretion, and / or interfere with androgen production. Uses for formulations incorporating the nanoparticles for treating cancer in a subject are also disclosed.

The invention discloses an application of a zeolite imidazole framework material in catalysis of a carbon-carbon condensation reaction of formaldehyde. The zeolite imidazole framework material is selected from ZIF-Co / IM, ZIF-Co / 2-MIM, ZIF-Co / 2-EIM, ZIF-Co / 2-PIM, ZIF-Co / 2-BIM, ZIF-Co / 4-MIM, ZIF-Co / dClIM, ZIF-Co / Pur, ZIF-Co / BzIM, ZIF-Co / 2-NIM or ZIF-Zn / 2-MIM. The zeolite imidazole skeleton nano-enzyme material can catalyze formaldehyde FA to generate carbon-carbon condensation so as to generate high value-added saccharide small molecules. Through comparison with a high performance liquid chromatogram of a standard substance, catalytic products are mainly C3 compounds glyceraldehyde (GCA) and dihydroxyacetone (DHA), and a small amount of C4 compounds comprise erythritol, threonose and ketulose. Compared with the traditional formaldehyde enzyme, the formaldehyde enzyme has the advantages of high-concentration substrate tolerance, high-temperature resistance and the like.

The invention relates to the high-efficiency synthesis of pure or multi-metallic derivatives of ZIF-11 or ZIF-12 or Amorph-ZIF structures, and subsequently the production of composite nano-structured materials with nano metal particles dispersed or embedded on a wide carbon surface through calcination under inert conditions, and the use of these composite nanomaterials as electrodes in Li-ion batteries, Li-S batteries, Na-ion batteries, K-ion batteries, supercapacitors, and fuel cells.

A cement paste composition includes a curable component including a cementitious material and a zeolitic imidazolate framework-67 (ZIF-67) present in an amount of 0.01 to 3% by weight based on a total weight of the cementitious material. The composition further includes water in an amount of 30 to 50% by weight based on a total weight of the cement paste composition. A cured specimen made from the cement paste composition has a compressive strength of 30 to 80 megapascal (MPa) according to ASTM C109 / C109M-21 standard test method, and a direct tensile strength of 1.2 to 2.2 MPa according to ASTM C307-18 standard test method. The ZIF-67 particles are uniformly distributed throughout the cured specimen. A method of producing the cement paste specimen.

The invention discloses a waste lithium iron phosphate electrode material coupled metal organic framework derived composite catalyst and preparation and organic pollutant treatment application thereof.The method comprises the steps that pretreated waste lithium iron phosphate electrode material (sLFP) powder and a zinc-based zeolite imidazole framework (ZIF-8) are mixed according to a specific mass ratio, high-temperature calcination is conducted in an inert atmosphere, and the metal organic framework derived composite catalyst is obtained; and tight coating and coupling of a ZIF-8-derived nitrogen-doped carbon skeleton on a LiFePO4 phase obtained by reconstruction after sLFP pyrolysis are realized, so that a novel composite catalyst with high specific surface area, excellent conductivity and rich active sites is obtained. According to the method, recycling high-added-value conversion of waste electrode materials is achieved, the degradation rate of a Fenton-like reaction system constructed by the obtained composite catalyst and peroxymonosulfate (PMS) in cooperation on refractory organic pollutants such as sulfamethoxazole (SMX) at the normal temperature reaches 98.5% or above, the excellent catalytic stability and the green integrated treatment advantage that waste is treated with waste are achieved, and the method is suitable for industrial production. Wide engineering application prospects are realized.

An electrocatalyst comprising bismuth nanodot-doped zinc materials is used for electrochemical reduction of carbon dioxide to formate. The electrocatalyst consists of bismuth nanodots dispersed on a zeolitic imidazolate framework-8 wherein the bismuth-zinc material is in the form of particles with a longest dimension of 200 to 1000 nm. The bismuth-zinc material is utilized in H cell, flow cell, and MEA cell applications for carbon dioxide reduction.

A method for preparing an MOF-based glucose detection system, wherein a Zeolitic Imidazolate Framework (ZIF) is used as a metal-organic framework, and glucose oxidase (GOx) is loaded in the zeolitic imidazolate framework. The preparation method comprises the following steps: S1: adding water to a reaction flask in advance, and then sequentially adding a metal ion, an enzyme and an organic ligand in a molar ratio of 100-1500:1-10:1-150, and 0.1-0.5% (by weight) of ammonia water to the reaction flask, S2: mixing and reacting same at room temperature for more than 6 hours, and S3: after centrifugation by means of a centrifuge, removing the supernatant to obtain a solid precipitate of the Gox-MOF material loaded with glucose oxidase. A sensor for detecting trace glucose concentration in saliva, and an oral glucose meter comprising the sensor.

The invention relates to the technical field of adsorption composite materials, in particular to a zeolite imidazate framework closed nickel composite material and a preparation method and application thereof. The composite material is prepared from Ni-NPs (at) gZIF-8 and MgH2, the Ni-NPs (at) gZIF-8 comprises a glass state ZIF-8 and metal nickel nanoparticles loaded in a pore channel of the glass state ZIF-8. The composite material disclosed by the invention has relatively high hydrogen storage capacity, and the reversible hydrogen storage capacity of the composite material is as high as 5.7-6.0 wt%; compared with the prior art, the initial hydrogen desorption temperature is obviously reduced to 230-245 DEG C and is far lower than 325 DEG C of pure MgH2; according to the composite material with nickel sealed by the zeolite imidazate framework, through the high stability and confinement effect of the glassy state ZIF-8, the cycling stability and mechanical strength of the material are remarkably improved, and the capacity retention rate exceeds 94% after 50 times of cycling.

The present application belongs to the field of environmental protection and new energy technology, and relates to a gaseous fermentation method for improving biogas quality by using zeolite imidazolate framework structure ZIF-8 material. The ZIF-8 material for improving the biological conversion efficiency of CO2 to CH4 is prepared, and has the effect of selectively adsorbing carbon dioxide and hydrogen. When applied to gaseous fermentation, the quality of the obtained methane can be effectively improved. The ZIF-8 material prepared by the present application is applied to an anaerobic gaseous fermentation system, and only a small amount of addition can promote the biological methanation process of CO2 in the biogas, increase the proportion of methane in the biogas, improve the quality of the biogas, and make the biogas reach the standard of direct use.

The application discloses a method for preparing monophenol chemicals by catalyzing lignin depolymerization through zeolite imidazolate framework material derivatives. The method uses lignin as raw material, uses zeolite imidazolate framework material derivatives as catalyst, and uses small-molecule organic alcohol as hydrogen-donor solvent. After inert gas replacement and pressure charging to 0.5-3 MPa, the reaction temperature is controlled to 200-240 DEG C, and stirring is carried out for 2-10 h, so that selective depolymerization of lignin can be realized without external hydrogen, and monophenol chemicals mainly composed of 4-propyl-2,6-dimethoxyphenol are obtained. The method is environment-friendly, stable in performance, highly efficient in catalysis and high in selectivity, and realizes selective conversion of lignin into monophenol chemicals mainly composed of 4-propyl-2,6-dimethoxyphenol without external hydrogen.

The present invention discloses a corrosion-resistant metal elbow for petrochemical use and a preparation method thereof, which relates to the technical field of metal elbows. The present invention prepares a corrosion-resistant metal elbow applied to the petrochemical field, and impregnates the metal elbow with a dopamine solution to improve the corrosion resistance of the metal elbow. The present invention prepares a zeolitic imidazolate framework-zinc oxide composite material. The zeolitic imidazolate framework material can effectively isolate corrosive ions, has excellent corrosion resistance, and has a large specific surface area, and can graft a large amount of polyethyleneimine of glycine to form a modified zeolitic imidazolate framework material. The tortuous surface of the modified zeolitic imidazolate framework material can further prevent the erosion of corrosive media. The modified zeolitic imidazolate framework material is compounded with nano-zinc oxide to improve the dispersion of nano-zinc oxide and further improve the corrosion resistance of the metal elbow.

The invention provides a stable and durable wearable sweat and sugar electrochemical sensor. A sensing interface of the sensor is prepared by sequentially dispensing a glucose sensing solution and a film forming solution on the surface of a carbon electrode, the glucose sensing solution comprises a zeolite imidazate framework-90 (ZIF-90 at GOx) composite material loaded with glucose oxidase, Prussian blue nanoparticles (PBNPs) and a conductive gel solution, and the film forming solution comprises ammonium persulfate and tetramethylethylenediamine. Glucose in sweat is oxidized by using ZIF-90 at GOx on a sensing interface, generated hydrogen peroxide reacts with PBNPs to generate a current signal on an electrode, and then quantitative analysis is performed on the glucose in the sweat based on a standard curve method. The wearable sweat and sugar electrochemical sensor provided by the invention has excellent environmental adaptability and durability, can be used outdoors for a long time, is simple to prepare and good in product performance, and has a very good application prospect in the field of development of wearable sweat and sugar sensors.

The invention discloses a fused salt heat storage material based on a lithium nitrate and polyvinylidene fluoride hybridized zeolite imidazate framework structure. The fused salt heat storage material comprises the following components in parts by mass: 20-35 parts of sodium nitrate, 25-40 parts of potassium nitrate, 10-20 parts of lithium nitrate, 10-25 parts of calcium nitrate and 0.5-2 parts of a polyvinylidene fluoride hybridized zeolite imidazate framework structure material, the polyvinylidene fluoride hybridized zeolite imidazate skeleton structure material is prepared by the following steps: step 1, adding a zinc nitrate solution into a 2-methylimidazole solution under a stirring condition, standing, carrying out a crystallization reaction, washing and drying to obtain a zeolite imidazate skeleton structure material; and step 2, mixing the zeolite imidazate skeleton structure material, polyvinylidene fluoride and dimethylformamide, and drying to obtain the polyvinylidene fluoride hybridized zeolite imidazate skeleton structure material. The fused salt heat storage material is high in specific heat capacity and low in viscosity.

The present invention belongs to the technical field of functional coatings, and specifically discloses a pH-responsive anti-corrosion and wear-resistant coating and a preparation method thereof. The anti-corrosion and wear-resistant coating is composed of composite nanocontainers and polymer resins, and the composite nanocontainers are composed of two-dimensional MXene nanosheets and zeolitic imidazolate frameworks. Among them, the mass ratio of the composite nanocontainers to the polymer resins is 1:200 to 1:30; the mass ratio of the zeolitic imidazolate frameworks to the two-dimensional MXene nanosheets is 1:2 to 1:10; the two-dimensional MXene nanosheets are selected from one or more of Ti3C2T x , V2CT x , Nb2CT x ; the zeolitic imidazolate frameworks include one or more of ZIF-7, ZIF-8, and ZIF-62; the polymer resins are one or more of polyurethane resins, silicone resins, epoxy resins, and fluorocarbon resins. The present invention also discloses a specific preparation method of the above coating, and the prepared coating can respond to the corrosion at the interface between the coating and the metal, showing great potential in intelligent protection applications.

The invention discloses a method for adsorbing and treating antibiotics in a water body by using a zeolite imidazate framework material prepared from an ionic liquid, which comprises the following steps: synthesizing the zeolite imidazate framework material by using an ionothermal method, and carrying out contact adsorption on the zeolite imidazate framework material and an aqueous solution containing the antibiotics to finish adsorption removal of the antibiotics in the aqueous solution, the ionothermal synthesis zeolite imidazate framework material can realize effective adsorption of cephalosporin antibiotics in an aqueous solution, the synthesis method is simple, convenient to operate, good in adsorption and removal effect and good in material reusability, and as a treatment method which can be commonly used and can effectively adsorb and remove the antibiotics in the aqueous solution, the zeolite imidazate framework material has good application prospects. And the method has certain application potential in practical application.

The invention belongs to the technical field of environmental engineering and material science, and particularly relates to a hydroxyl-containing zinc zeolite imidazole framework material as well as a preparation method and application thereof. The preparation method comprises the following steps: mixing a zinc precursor and an imidazole ligand in proportion by adopting a mechanochemical method, mechanically grinding under the assistance of a small amount of water, washing and drying. The obtained material is of a microporous structure, the specific surface area is 500-2000 m < 2 > / g, the particle size is 20 nm-50 [mu] m, and the defect rate is high. The method has the advantages that the preparation process is green, environment-friendly, rapid, efficient and suitable for mass production, and the coordination capability can be enhanced through the synergistic effect of hydroxyl and imidazole groups of the residual raw materials. The obtained material can be used for heavy metal ion adsorption, especially has high removal rate and high adsorption capacity (50-600 mg / g) for radioactive uranium elements, and has wide application prospects in the field of environmental restoration.

Described herein are methods and systems for proposing coordination framework compounds, such as crystalline porous materials, crystalline open frameworks, network chemical compounds, metal-organic framework (MOF) compounds, covalent organic framework (COF) compounds, zeolitic imidazole framework (ZIF) compounds, and combinations thereof. Also described herein are coordination frame compounds produced by these methods and systems and adsorbent systems comprising these coordination frame compounds. The methods and systems described herein combine machine learning and chemistry to propose chemically effective and improved performance coordination framework compounds that meet the different objectives of material discovery.

The application discloses a hybrid synergistic electrochemiluminescence quencher, a preparation method and application thereof. Dopamine, zinc ions and 2-methyl imidazole are used as raw materials to synthesize polydopamine and a hybrid material of a zeolitic imidazolate framework by one-pot synthesis under alkaline conditions. The introduction of the electropositive zeolitic imidazolate framework can greatly eliminate the strong electronegativity of the polydopamine and simultaneously endow the quencher with good porosity. The quencher prepared by the application is nanospheres, has a large specific surface area and weak electronegativity, and exhibits good scavenging capacity for free radicals, especially electrogenerated anionic radicals, and has a high quenching efficiency on electrochemiluminescence. After the quencher is labeled with an antibody, the quencher is used for constructing an electrochemiluminescence immunosensor for ochratoxin A. The electrochemiluminescence immunosensor prepared by the application has a wide detection range, a low detection limit and good stability in the detection of ochratoxin A, and has a wide application prospect in the fields of electrochemiluminescence technology and the like.

To provide a porous carbon material carrying metal particles, a production method therefor, and a catalyst prepared using the same.SOLUTION: The porous carbon composite material of the present invention contains a porous carbon nanotube based on a fullerene nanotube and a porous carbon structure based on a zeolitic imidazolate framework (ZIF) positioned on the surface of the porous carbon nanotube and containing metal particles, wherein a ratio of an atomic percentage of metal particles (M) to carbon (C) constituting the porous carbon nanotube and the porous carbon structure is 0.015 or more and 0.03 or less.SELECTED DRAWING: Figure 1

The patent relates to a method for improving the preparation of sodium alginate pervaporation membrane by using two-dimensional leaf-shaped zeolitic imidazolate framework (ZIF-L) material. The pervaporation mixed matrix membrane comprises a base film and a separation layer film, the base film adopts polyacrylonitrile (PAN) film, and the separation layer is composed of ZIF-L and sodium alginate. The application improves the distribution of ZIF-L in the membrane, forms directional arrangement, and improves the separation effect and selectivity of the composite membrane. By using a new process, the defect problem of ZIF-L-SA membrane is eliminated, a continuous ultrathin ZIF-L membrane is prepared by a secondary seed growth method, and the performance of the two-dimensional ZIF-L membrane is improved. The ZIF-L synthesis condition is mild, the method is simple, the hydrophilic modification of the membrane surface is realized, the internal water molecule transmission channel is constructed, and the separation factor and stability of the membrane are improved. The prepared high-flux pervaporation membrane has broad application prospect.

The application provides a cuboid-shaped zeolitic imidazolate framework-8 nanoparticle, which comprises elements of carbon (C), oxygen (O), zinc (Zn), nitrogen (N) and manganese (Mn); and is a cuboid-shaped ZIF-8 nanoparticle with a mesoporous or microporous structure, a length-diameter ratio of (1-5):1, and elements of carbon (C), oxygen (O), zinc (Zn), nitrogen (N) and manganese (Mn) uniformly distributed in the cuboid-shaped ZIF-8 nanoparticle; and the cuboid-shaped ZIF-8 nanoparticle has good adjuvant activity. Meanwhile, the application also provides a preparation method and application of the cuboid-shaped zeolitic imidazolate framework-8 nanoparticle.

The application discloses a reflective film and a preparation method and application thereof, and belongs to the technical field of optical reflective films. The reflective film comprises a base film and a coating layer arranged on the surface of the base film; the coating layer contains a modified tetraazametallaporphyrin compound; the modified tetraazametallaporphyrin compound has a core-shell structure, the inner core is tetraazametallaporphyrin, and the outer shell is a zeolitic imidazolate framework; the chemical formula of the tetraazametallaporphyrin is: R1-R8 independently include: a hydrogen atom, a halogen element, a branched or cyclic aliphatic hydrocarbon group with 3-10 carbon atoms, an aromatic hydrocarbon group, a hydroxyl group, a sulfonic acid group or an amino group; M is a divalent metal ion; the zeolitic imidazolate framework contains Zn for coordination with N in the tetraazametallaporphyrin 2+ . The reflective film is resistant to light and has a wide color gamut. The reflective film can be further used in display devices.