294 results about "Bi functional" patented technology

The invention provides a PtRu-based composite bifunctional catalyst and a preparation method and application thereof, the PtRu-based composite bifunctional catalyst comprises a carrier and a load loaded on the carrier, and the carrier comprises a graphitized carbon carrier; the load comprises platinum ruthenium-based metal particles and a compound with a chemical formula of HxMO3, wherein M comprises W or / and Mo. According to the PtRu-based composite bifunctional catalyst disclosed by the invention, the metal PtRu plays a role in resisting CO poisoning, and the HxMO3 plays a role of a proton acceptor, so that a hydrogen oxidation reaction is promoted. Meanwhile, the HxMO3 can strengthen a difunctional mechanism of a carbon monoxide oxidation reaction, and the CO poisoning resistance of the catalyst is improved. In addition, the graphitized carbon carrier with a specific graphite microcrystal size has good high-potential corrosion resistance and metal dispersibility, and metal agglomeration and performance degradation of the catalyst caused by high-potential corrosion of the carrier are greatly slowed down.

The invention relates to the technical field of chemical catalysis, and particularly discloses a covalent organic framework material loaded bimetallic monatomic electrocatalyst and a preparation method and application thereof, the catalyst comprises a carrier and atomic-scale dispersed metal diatomic active sites; the atomic-scale dispersed metal diatomic active sites are anchored in the carrier through a simple post-impregnation method; the carrier is a triazinyl covalent organic framework; a coordination structure is formed between the atomic-scale dispersed metal diatomic active sites and the carrier through a nitrogen-metal-chlorine bridging structure; the diatom-dispersed difunctional electrocatalyst has good overall water decomposition performance, under the condition of 1M KOH, the overpotential of hydrogen evolution reaction is 39.3 mV at 10 mA cm <-2 >, the overpotential of oxygen evolution reaction is 251.2 mV at 10 mA cm <-2 >, the synthesis process is simple and easy to implement, the preparation cost is low, and the diatom-dispersed difunctional electrocatalyst has industrial production and application prospects.

The invention discloses immobilized lipase based on bifunctional silicon dioxide as well as a preparation method and application of the immobilized lipase. Hydrophobic modification and covalent modification are performed on the surface of mesoporous silicon dioxide to obtain a bifunctional silicon dioxide carrier; the hydrophobic modification is any one of methylation modification, octylation modification, octadecyl alkylation modification, esterification modification and bromopropylation modification. The dual-functionalized silicon dioxide carrier is used for immobilization of lipase, and the prepared immobilized lipase can be used for production of biodiesel. The immobilized lipase provided by the invention is mild in enzyme reaction condition, good in biocompatibility, relatively high in enzyme activity, and excellent in stability and repeatability. In addition, by changing the ratio of the covalent modifier to the hydrophobic modifier, the catalytic activity and stability of the immobilized enzyme and the biodiesel yield are remarkably improved.

Embodiments provide bimodal polymerization catalyst systems comprising metallocene olefin polymerization catalysts and biphenylphenol polymerization catalysts made from biphenylphenol polymerization precatalysts of Formula I.

The invention belongs to the technical field of nano composite materials, and relates to a preparation method and application of a difunctional nano enzyme Eu (at) Ce-MOF. According to the invention, ceric ammonium nitrate is used as an inorganic metal source, terephthalic acid is used as an organic ligand, and Ce-MOF is synthesized in one step by using a hydrothermal method; and then introducing europium nitrate hexahydrate and sodium citrate to prepare the Eu (at) Ce-MOF composite material through one-step in-situ functionalization. Ce-MOF is functionalized by using europium nitrate hexahydrate, and second metal activity is introduced, so that the bi-metal synergistic effect is realized to enhance the peroxidase-like activity of the composite material; meanwhile, the introduced Eu < 3 + > is used as a recognition element and has specific recognition capability on Pi, specific recognition sites of the Eu-coated Ce-MOF composite material are increased, and the difunctional nano-enzyme with strong enzyme-like activity and specific recognition capability is prepared.

The invention discloses a difunctional electrocatalyst for carbon dioxide reduction and PET plastic oxidation and a preparation method and application of the difunctional electrocatalyst, and belongs to the field of application of electrocatalytic materials. The preparation method comprises the following steps: precipitating copper chloride and sodium hydroxide to obtain a precursor of copper hydroxide, and freeze-drying, washing and drying the precursor. The problem that the voltage required by the anode reaction is large when carbon dioxide is electrolyzed is solved. And meanwhile, the material has the advantages of excellent negative and positive electrode bifunctional activity and simultaneous generation of chemicals with high added value at the two electrodes, and has certain commercial application value. Meanwhile, the preparation method is simple, and technical feasibility is provided for large-scale preparation of fine chemicals through carbon dioxide reduction.

The invention provides a bifunctional oxygen electrocatalyst with an asymmetric coordination structure and a preparation method and application thereof, a porous layered precursor is formed through an amide reaction between melamine and citric acid, and the special structure and different functional groups of the porous layered precursor provide many sites for insertion and adsorption of transition metal ions; and an asymmetric coordination structure with high active sites can be formed, the electronic structure of transition metal ions is effectively optimized, and the electro-catalytic performance is improved. The bifunctional oxygen electrocatalyst prepared by the invention shows excellent ORR / OER activity under alkaline conditions, and the power density of a zinc-air battery driven by the bifunctional oxygen electrocatalyst as a cathode catalyst reaches up to 226.7 mW cm <-2 >.

The invention discloses a synthesis method of a bifunctional MeOx / AZE catalyst and application of the bifunctional MeOx / AZE catalyst in catalyzing CO2 hydrogenation to synthesize high-density aviation fuel, MeOx in the catalyst is a composite metal oxide of metal Zr and auxiliary metal M, the content of Zr in the metal is 75.0-95.0 mol%, and the content of the auxiliary metal M is 5.0-25.0 mol%; the auxiliary metal M is one or more of Zn, Ga, Ce, La and In; aZE is an acidic molecular sieve. The synthesized catalyst shows excellent CO2 hydrogenation coupling performance, the polycyclic aromatic hydrocarbon is introduced in the CO2 hydrogenation reaction for functional coupling reaction, the conversion of CO2 is promoted, the coupling reaction with the polycyclic aromatic hydrocarbon is carried out, the alkyl-substituted polycyclic hydrocarbon compound is synthesized, the difficulty that high-density aviation fuel components cannot be synthesized through single CO2 hydrogenation is overcome, and the synthesis efficiency is improved. And the selectivity of the high-density aviation fuel component alkyl polycyclic hydrocarbon product with excellent performance is enhanced.

This disclosure provides compounds of Formula (I) (e.g., Formula (I-1), Formula (I2), Formula (I-a) (e.g., Formula (I-a-1), (I-a-2), (I-a-3), or (I-a-4)), Formula (I-b) (e.g., Formula (I-b-1), (I-b-2), (I-b-3), or (I-b-4)), Formula (I-c) (e.g., Formula (I-c-1) or (I-c-2)), Formula (I-d) (e.g., Formula (I-d-1)), or Formula (I-e) (e.g., Formula (I-e-1) or (I-e-2))), Formula (II), or Formula (II-a) (e.g., Formula (II-a-1)), or pharmaceutically acceptable salts thereof, that induce degradation of a BCL6 protein. These compounds are useful, for example, for treating a cancer in a subject (e.g., a human). This disclosure also provides compositions containing the compounds provided herein, or pharmaceutically acceptable salts thereof, as well as methods of using and making the same.

The invention discloses a difunctional composite preparation capable of rapidly and deeply removing calcium ions and synchronously adjusting pH, and belongs to the field of sewage treatment preparations. The novel bifunctional composite preparation provided by the invention has the capability of rapidly and deeply removing Ca < 2 + > and adjusting pH by utilizing high-concentration Ca < 2 + > in-situ induced crystallization on the surface of the calcium ion-rich adsorbent powder and the buffering property of oxalic acid and phosphate radicals; the bifunctional composite preparation is put into a pressure filtrate with the influent Ca < 2 + > concentration of 1800 mg / L and the pH value of 12.4, and after static settlement is performed for 30 min, the effluent Ca < 2 + > concentration is lower than 1000 mg / L, and the pH value is lower than 9.

The invention discloses a transition metal doped base bifunctional CO2 adsorbent, a preparation method and application thereof. The transition metal doped base bifunctional CO2 adsorbent comprises a base bifunctional material and transition metal. The preparation method comprises the following steps: weighing transition metal, Ni, Na and Zr sources, mixing and dissolving in deionized water, stirring to form a uniform solution, weighing a precipitant, dissolving in deionized water, adding into the mixed system after complete dissolution, and stirring to form a uniform solution; stirring and precipitating the mixed system in a constant-temperature water bath kettle, drying the precipitate, calcining the obtained solid powder, and grinding into powder to obtain the transition metal doped base bifunctional CO2 adsorbent. The preparation method of the transition metal doped basic group difunctional CO2 adsorbent material is simple, a coprecipitation method preparation process is adopted, transition metal is doped into Ni-Na2ZrO3, formation of in-situ holes and pore channels is promoted, and the exposed area of active sites of the adsorbent is increased; meanwhile, the formation of lattice defects in unit cells is promoted, the surface energy of the crystal face of the material is changed from the physical dimension of a solid, and the adsorption capacity and cycling stability of CO2 are improved.

The invention relates to the technical field of biology, in particular to a mutant of difunctional glutathione synthetase and application of the mutant. The amino acid sequence of the mutant of the difunctional glutathione synthetase provided by the invention is obtained by performing site-directed mutagenesis on at least one of the 597th site, the 607th site, the 609th site, the 610th site, the 728th site and the 733th site of the amino acid sequence of the wild type difunctional glutathione synthetase, and the amino acid sequence of the wild type difunctional glutathione synthetase is shown as SEQ ID NO: 1. The mutant of the bifunctional glutathione synthetase provided by the invention has relatively high enzyme activity and enzyme stability, is more suitable for industrial production and is suitable for preparing glutathione, and the efficiency of preparing glutathione is improved.

The invention relates to a transition metal nickel monatomic difunctional electrocatalyst and a preparation method and application thereof, and belongs to the technical field of carbon dioxide electrolysis. The catalyst takes a transition metal nickel monatomic as an active component, the loading capacity of the active component is 2-5wt.%, a nitrogen-doped carbon material is taken as a carrier, and the microstructure of the carrier is a rhombic dodecahedron with the particle size of 100-200nm. The difunctional electrocatalyst used in the invention has excellent double functions of carbon dioxide electroreduction and sulfur dioxide electrooxidation activity, is applied to the constructed novel carbon dioxide electrolysis system, has lower electric energy consumption and operation cost compared with the traditional electrolysis system, and has huge application potential.

Embodiments described herein relate to a bi-functional thermal cooling system. The bi-functional thermal cooling system includes a first body, a second body, and a third body. The second body has a first plurality of Weyl semimetal nanostructures. The second body is spaced apart from the first body. The third body has a second plurality of Weyl semimetal nanostructures. The third body is spaced apart from the second body. The second body and the third body are each configured to independently rotate with respect to the first body to change an optical property of the first plurality of Weyl semimetal nanostructures of the second body and an optical property of the second plurality of Weyl semimetal nanostructures of the third body.

The application discloses a bifunctional In-doped Ni2Mo3N@Mo2C binary heterojunction catalyst and a preparation method and application thereof. A dimethyl imidazole solution is slowly added into a Mo salt solution to obtain a suspension liquid containing a Mo metal organic framework Mo-MOF; the suspension liquid is left to stand, and a precipitate is centrifuged and washed, and vacuum dried to obtain the Mo-MOF containing the Mo metal organic framework; a Ni salt, an In salt and the Mo-MOF are added into an anhydrous ethanol solution to perform ion exchange, and the precursor is vacuum dried to obtain the bifunctional In-doped Ni2Mo3N@Mo2C binary heterojunction catalyst. The catalyst material has excellent basic oxygen evolution and urea oxidation activity, and has a good application prospect in electrocatalytic decomposition of water, urea-assisted electrolysis of water and treatment of sewage containing urea.

The invention belongs to the field of biomass-based functional materials, relates to a difunctional coating based on enzymolysis modified cassava starch as well as a preparation method and application of the difunctional coating, and innovatively solves the technical problem that a single coating gives consideration to oil prevention and water absorption through a synergistic technical path of pretreatment and composite enzymolysis. The core mechanism is as follows: the starch particle structure is destroyed through pretreatment, and the degradation degree of starch is accurately controlled through the synergistic effect of alpha-amylase and saccharifying enzyme, so that an unexpected technical effect is achieved, and an enzymolysis product with a film-forming skeleton (medium molecular weight dextrin) and a hydrophilic unit (small molecular saccharide) is formed; meanwhile, a compact and continuous network structure can be formed by a film-forming framework, and grease permeation is blocked; and the hydrophilic unit endows the coating with a rapid capillary water absorption effect.

The invention relates to a method for synthesizing cyclic carbonate by catalyzing olefin oxidative carboxylation with a difunctional ionic liquid, which comprises the following steps: in a synthesis system, adding an oxidant and an additive into olefin serving as a raw material and the difunctional ionic liquid serving as a catalyst, and then carrying out epoxidation reaction; after the reaction is finished, potassium iodide and a carboxylation reagent are added into a reaction system, then cycloaddition reaction is performed, and finally cyclic carbonate can be prepared. The bifunctional ionic liquid is used as a catalyst, so that the olefin epoxidation reaction can be catalyzed, the cycloaddition reaction of an epoxide intermediate and CO2 can also be catalyzed, and the problem that a two-step reaction catalytic system is incompatible is solved. The adopted raw materials are cheap and easy to obtain, a metal-free catalyst is used, the method has the advantages of being economical and environmentally friendly, and an alternative scheme is provided for synthesis of cyclic carbonate.

The invention belongs to the field of electro-catalytic materials, and particularly relates to a bifunctional electro-catalytic water decomposition material and preparation and application thereof.The preparation method includes the steps that a first MOF precursor material is subjected to a first-stage coordination reaction in a solution containing an auxiliary a and an auxiliary b, and a first MOF is obtained; the first MOF is used as a substrate, a second-stage coordination reaction is carried out on a second MOF precursor material in a solution of an auxiliary c, the second MOF is deposited on the first MOF, and a core-shell double-MOF material is prepared; performing heat treatment on the core-shell dual-MOF material to obtain a heat-treated material; and mixing the heat treatment material with a phosphorus source, carrying out phosphating roasting treatment, and putting a phosphating product into a liquid-phase cooling medium while the phosphating product is hot, and carrying out quenching treatment, so as to obtain the bifunctional electro-catalytic water decomposition material. The bifunctional electro-catalytic water decomposition material prepared by the preparation method disclosed by the invention has excellent HER and OER dual catalytic activity.

The invention provides a novel bifunctional material and a preparation method and application thereof, and relates to the technical field of catalyst preparation, the bifunctional material has the following general formula: A-M / CaO-S, wherein A is an active component, M is an auxiliary agent metal, and S is a bifunctional material carrier; a is selected from at least one of Rh, Ru and Ni; m is selected from at least one of La, Ce, K and Na. According to the invention, the problems of tedious steps, low carbon efficiency, low energy efficiency and poor technical economy due to mutual independence of carbon dioxide trapping and chemical utilization processes are solved, and the technical effects of efficiently trapping carbon dioxide, catalyzing the reaction of carbon dioxide and methane in situ and successfully generating synthesis gas (H2 and CO) are achieved; and a solid scientific support is provided for economical efficiency and resource utilization of carbon dioxide.

The invention belongs to the related technical field of preparation of inorganic nano materials, and particularly relates to a preparation method of a bifunctional material for storage-in-situ oxidation of VOCs (volatile organic compounds), the preparation method takes ZSM-5 as a substrate material, an ion exchange method is used for modification, and the preparation method comprises the following steps: adding a pretreated commercial H-type molecular sieve into a metal nitrate solution, and stirring to obtain a mixed solution; stirring and reacting under a water bath condition, and then filtering, washing, drying and calcining to obtain the bifunctional material. The method disclosed by the invention has the advantages of simple process, low cost and the like, and the prepared bifunctional material has excellent storage-in-situ oxidation performance on toluene.

The present invention generally relates to electrochemical energy storage and battery technology. Specifically, the present invention relates to bifunctional electrocatalyst for metal-air electrochemical device. More particularly, the present invention relates to Nickel-Iron metal¬ organic framework (NF-MOF) as bifunctional electrocatalyst for zinc-air battery application. Further, the present invention relates to synthesis of Nickel-Iron metal-organic framework (NF- MOF) by refluxing method.

The invention discloses a bifunctional ionic liquid as well as a preparation method and application thereof, and belongs to the technical field of lithium resource extraction and hydrometallurgy. According to the invention, the dual-functional ionic liquid is prepared, and the dual-functional ionic liquid can be used for synchronously realizing efficient extraction of lithium ions from the lepidolite acid leaching solution and synergic deep removal of fluorine and chlorine, so that the limitation and defects of a traditional solvent extraction agent are effectively overcome; the problems that an existing lepidolite lithium extraction technology is long in process, low in separation efficiency and serious in equipment corrosion can be solved.

This invention belongs to the field of electrocatalytic materials, specifically relating to bifunctional electrocatalytic water splitting materials and their preparation and application. The preparation steps include: performing a first coordination reaction on a first MOF precursor material in a solution containing promoter a and promoter b to obtain a first MOF; using the first MOF as a substrate, performing a second coordination reaction on a second MOF precursor material in a solution containing promoter c to deposit the second MOF onto the first MOF, thus obtaining a core-shell bifunctional MOF material; subjecting the core-shell bifunctional MOF material to heat treatment to obtain a heat-treated material; then mixing the heat-treated material with a phosphorus source for phosphating and calcination, and rapidly cooling the phosphating product while hot in a liquid-phase cooling medium to obtain the bifunctional electrocatalytic water splitting material. The bifunctional electrocatalytic water splitting material prepared by the method of this invention exhibits excellent dual catalytic activity for both HER and OER.

The invention discloses a preparation method of a difunctional electrode, the electrode and application, and the preparation method comprises the following steps: (1) preparing an electroplating solution: taking deionized water as a solvent, sequentially adding nickel sulfate, ammonium sulfate, ammonium chloride and sodium thiosulfate, uniformly stirring, and adjusting the pH value to 4.5-5.5; (2) electrode pretreatment: taking a nickel wire mesh subjected to double-sided sand blasting as a cathode, and then sequentially removing oil and an oxide layer; and (3) electrochemical deposition: putting the pretreated cathode and the nickel-based stretching net anode into an electroplating solution, respectively connecting the cathode and the anode with the cathode and the anode of a power supply, and performing constant-current deposition at room temperature at the current density of 5-20mA / cm < 2 > for 30-90 minutes to obtain the difunctional electrode. The NiS alloy is prepared by optimizing an electroplating co-deposition process, the unification of high electrochemical activity and anti-iron adsorption performance is realized by utilizing a dual anti-iron mechanism of a polysulfide protective layer, the energy consumption of an electrolytic bath is reduced, and the service life is prolonged.

A bi-functional reactor and method for producing liquid fuels by reducing CO2 and oxidizing CH4. The reactor includes a vessel having first and second compartments separated by a membrane permeable to water. The first compartment is a catholyte chamber having an inlet, outlet, an electrode for reduction, and catholyte solution. The inlet of the catholyte chamber allows CO2 to flow as a feedstock into the first compartment, while the outlet allows excess CO2 and gaseous reduction products to exit the compartment. The second compartment is an anolyte chamber having an inlet, outlet, an electrode for oxidation, and anolyte solution. The inlet of the anolyte chamber allows CH4 to flow as a feedstock into the second compartment, while the outlet allows excess CH4 and gaseous oxidation products to exit the compartment. CO2 is reduced in the catholyte chamber and CH4 is oxidized in the anolyte chamber to form liquid fuels.

The invention provides a NiFePS / Co-ZIF-67 electrocatalyst as well as a preparation method and application of the NiFePS / Co-ZIF-67 electrocatalyst. The NiFePS / Co-ZIF-67 electrocatalyst is of a three-dimensional composite nanostructure formed by stacking NiFePS nanospheres on Co-ZIF-67 nanosheets grown on foamed nickel in situ. When the NiFePS / Co-ZIF-67 electrocatalyst is used as a difunctional electrocatalyst for full water splitting, the excellent difunctional full water splitting performance is shown, and the NiFePS / Co-ZIF-67 electrocatalyst has good catalytic stability under the conditions of HER, OER and full water splitting.

The invention relates to the field of chemical amplification gel, and discloses a bifunctional molecular group and a preparation method and application thereof.The bifunctional molecular group comprises PAG, PQD1 and PQD2, the PQD1 and the PQD2 are the same or different, and the synthesis method of the bifunctional molecular group comprises the steps that under the alkaline condition, acetone glyceryl reacts with PAG to generate 1-PGA-acetone glyceryl ether, the product is hydrolyzed under the acidic condition to obtain 1-PGA-glyceryl ether, and the 1-PGA-glyceryl ether is hydrolyzed under the acidic condition to obtain the 1-PGA-glyceryl ether. The product reacts with PQD1 and PQD2 in the presence of a catalyst under the heating reflux condition to obtain a target bifunctional molecular group, and when the bifunctional molecular group is applied to chemical amplification glue, the contrast ratio of the chemical amplification glue can be effectively improved, and the resolution ratio is increased.

The invention relates to the technical field of environmental remediation, and particularly provides a bifunctional copper-based coordination polymer photocatalyst as well as a preparation method and application thereof.The bifunctional copper-based coordination polymer photocatalyst is prepared from copper chloride dihydrate, 4, 4 '-bis (3-pyridinecarboxamide) diphenyl ether and benzoic acid as main raw materials by adjusting reaction parameters. And reacting in a hydrothermal kettle to generate the bifunctional copper-based coordination polymer photocatalyst {[Cu2 (3-padpe) 2Cl2]. H2O} n. The method has the characteristics of simple process, low cost, high catalyst activity, good stability, reusability and the like, shows good application potential in repairing water bodies and soil polluted by organic matters and heavy metals, and provides a new research thought and insight for development of a novel multifunctional environment repairing agent.