194 results about "Bi functional" patented technology

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 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 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 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.

The invention discloses an antibacterial and hydrophilic dual-functional ionic liquid double-layer membrane as well as a preparation method and application thereof. According to the double-layer film, corn starch (ST) and polyvinyl alcohol (PVA) serve as substrates, and natural dye alizarin (AL) is mixed to serve as a hydrophilic layer; chitosan (CS), corn protein (Zein) and vanillin (VA) serve as a supporting layer; meanwhile, the ionic liquid is doped, so that the double-layer film is endowed with a fresh-keeping function and sensitive detection capability, the limitation of a single detection function is broken through, and a new thought is provided for food safety.

Disclosed herein are novel bifunctional compounds formed by conjugating an EGFR inhibitor moiety with an E3 ligase ligand moiety, methods for preparing the same, and uses thereof.

The invention provides a preparation method of a novel chiral thiourea / phosphine bifunctional organic catalyst with a cis-cyclic 1, 2-phosphinamine skeleton and application of the novel chiral thiourea / phosphine bifunctional organic catalyst in an asymmetric catalytic reaction. The chiral organic catalyst is prepared by taking cis chiral 2-(diphenylphosphine)-1, 2, 3, 4-tetrahydro-1-naphthylamine and an isothiocyanate compound as raw materials through a one-step reaction under a mild condition. The chiral thiourea / phosphine bifunctional organic catalyst is simple to prepare and stable in property, and shows excellent catalytic activity and stereoselectivity in an asymmetric hydrosilylation reaction of o-amido benzophenone.

This work investigates the beneficial roles of lithium bis(trimethylsilyl) phosphate (LiTMSP) which may act as a novel bifunctional additive for lithium ion batteries, in particular, LiNi0.5Mn1.5O4 (LNMO) / graphite cells. The cycle performance of LNMO / graphite cells is significantly improved with incorporation of LiTMSP. Trimethylsilyl functional group therein can react with HF generated through hydrolysis of LiPF6 by residual water in electrolyte solution, followed by a decrease in the concentration of metal ions dissolution from the electrode. The generation of superior passivating surface film derived by LiTMSP on graphite electrode, suppressing further electrolyte reductive decomposition and deterioration / reformation caused by migrated metal ions, is confirmed. Furthermore, LiTMSP derived surface film is likely to have better lithium ions conductivity with a decrease in resistance of the graphite electrode, improving rate performance of cells. The HF scavenging and film-forming effects of LTMPS are responsible for the less polarization of cells enabling to improve cycle performance.

This invention belongs to the field of water electrolysis materials, specifically relating to a HER-OER bifunctional material and its preparation and application. The preparation method includes the following steps: a coordination reaction is carried out on mesoporous silica, a transition metal source, a heterocyclic compound of formula 1 (), and a structure inducing agent to obtain a composite material; the structure inducing agent is at least one of formulas 2 (), 3 (), and 4 (); the composite material from the coordination reaction is modified by a modifying liquid to obtain a modified material; the modifying liquid is a solution containing dissolved HF; the modified material from the modification reaction, a phosphating auxiliary, and a phosphating reagent are calcined in an atmosphere containing a functional gas at a temperature of 150℃~500℃ to obtain the HER-OER bifunctional material; the functional gas includes at least one of oxygen and H2S. The material prepared by this invention possesses special physicochemical properties, exhibiting excellent HER-OER bifunctionality. Furthermore, when used in water electrolysis, this material also exhibits low overall water electrolysis current density and excellent stability.

The invention discloses a double-function (p) ppGpp synthetase or hydrolase mutant, a biological material and application of the double-function (p) ppGpp synthetase or hydrolase mutant to preparation of L-threonine, and belongs to the technical field of gene engineering. The technical problem to be solved by the invention is how to improve the yield of L-threonine. Relative to a wild type, the bifunctional (p) ppGpp synthetase or hydrolase mutant comprises one or more of the following mutations: K1) mutation of 174th amino acid of SEQ ID NO: 2 into cysteine, K2) mutation of 529th amino acid of SEQ ID NO: 2 into phenylalanine, and K3) insertion of histidine and aspartic acid between 84th amino acid and 85th amino acid of SEQ ID NO: 2. The bifunctional (p) ppGpp synthetase or hydrolase mutant provided by the invention can be used for improving the yield of L-threonine of Escherichia coli.

The invention discloses a preparation method and application of a compound with emulsifying and antibacterial dual functions, and belongs to the technical field of food active packaging materials. The compound is prepared through a two-step method, a synergistic antibacterial mechanism is formed by means of the hydrophobic binding effect of the amyloid fiber and the cationic electrostatic interaction of the chitosan, and meanwhile excellent emulsion stability and antibacterial activity are achieved through the hydrogen bond-electrostatic interaction of the amyloid fiber and the chitosan. When the compound is applied to preparation of the polysaccharide-based composite film, the mechanical property of the film can be remarkably improved. The raw materials are all natural degradable components, the preparation process is simple, and the obtained composite film can efficiently prolong the shelf life of aquatic products, conforms to the green packaging development trend and has important application value in the field of food active packaging.

The invention discloses a bifunctional group copolymerization separation membrane with a main chain containing crown ether as well as a preparation method and application of the bifunctional group copolymerization separation membrane. According to the method, 2, 2 '-bis (3-sulfonated propoxy) biphenyl disodium and isatin are used as monomers, a bifunctional material with a main chain containing crown ether is prepared through a superacid catalyzed polycondensation reaction under the condition of a certain reaction temperature, and a pure product is obtained through a large amount of water washing; secondly, preparing the prepared sample into a film through a non-solvent phase transfer method. The prepared bifunctional group copolymerization separation membrane material with the main chain containing crown ether shows relatively good ion exchange capacity, permeation selectivity and stability for lithium element in waste liquid, is simple and convenient to operate and controllable in cost, and shows a good application prospect.

The invention relates to the technical field of organic chemical synthesis, and discloses a dibenzoylmethane synthesis process which comprises the following steps: carrying out functional modification on the surface of a carrier, carrying out ionic liquid modification treatment, introducing self-healing functional molecules, loading bifunctional active sites, regulating and constructing a phase interface, periodically recovering performance, and catalyzing Claisen condensation reaction to prepare dibenzoylmethane. Long-term stable operation of the supported bifunctional catalyst is realized through self-healing functionalized ionic liquid modification, the problems that a traditional homogeneous catalyst is difficult to separate and active sites of a multifunctional catalyst interfere with each other are solved, the service life of the catalyst is remarkably prolonged, and the reaction efficiency of the catalyst is remarkably improved; and a new technical path is provided for continuous clean production of the beta-diketone compound.

Provided herein are polypeptides, compositions, and methods for treating a cancer in an individual using a polypeptide comprising a thrombopoietin domain and a Flt3 ligand domain. Also provided herein are nucleic acids encoding such polypeptides, expression vectors and cells comprising such nucleic acids, and methods of producing the polypeptides comprising a thrombopoietin domain and a Flt3 ligand domain. The administration of a fusion polypeptide comprising a thrombopoietin domain and a Flt3 ligand domain to a subject may treat and reduce the symptoms of hematopoietic failure, including thrombopenia, and / or acute radiation syndrome.

The invention provides a difunctional electrocatalyst prepared by using Joule heat and a preparation method and application thereof, and belongs to the technical field of new energy materials. The preparation method comprises the following steps: synthesizing an organic framework compound by adopting dimethyl imidazole, zinc nitrate and transition metal salt of cobalt (Co), then pyrolyzing to prepare a cobalt-nitrogen-doped carbon material with oxygen reduction (ORR) activity, mixing the cobalt-nitrogen-doped carbon material with a nickel compound and an iron compound respectively, and preparing the cobalt-nitrogen-doped carbon material. Nickel and iron compounds are reduced into alloy nanoparticles in an extremely short time by using Joule heat, and the alloy nanoparticles are directly loaded on the surface of a cobalt-nitrogen-doped carbon material to obtain a high-performance dual-function (ORR and OER) electrocatalyst which can be used as a cathode catalyst to be applied to a metal-air battery.

Described herein are bifunctional degrader compounds, their various targets, their preparation, pharmaceutical compositions containing them, and their use in the treatment of conditions, diseases, and disorders mediated by various target proteins. [Formula 1] TIFF2022547716000696.tif17118

The invention relates to a marine-derived bifunctional enzyme as well as a coding gene and application thereof, and belongs to the technical field of biological enzymes. The amino acid sequence of the bifunctional enzyme PpLipO is as shown in SEQ ID NO. 2, and the nucleotide sequence of the bifunctional enzyme PpLipO is as shown in SEQ ID NO. 1. The enzyme comprises an alpha / beta hydrolase structural domain and an osmotic pressure induced protein structural domain, which are respectively PpLipOLip and PpLipOsmC. The novel marine-sourced bifunctional enzyme PpLipO is found for the first time, lipid peroxides are efficiently removed through the synergistic effect of two structural domains, on one hand, the problems that due to the fact that unsaturated fatty acid in fat-containing food is prone to oxidation, the nutritional value of the food is reduced, the sensory quality is degraded, and the edible safety risk is caused can be solved, and on the other hand, the marine-sourced bifunctional enzyme PpLipO can be used for efficiently removing the lipid peroxides; on the other hand, toxic lipid peroxides generated in skin oxidative injury can be cleared away, skin injury is relieved, and the compound can be used for preparing antioxidants.

The invention discloses a bifunctional membrane for NH3-SCR (Selective Catalytic Reduction) denitration and particulate matter filtration and a preparation method of the bifunctional membrane. The preparation method comprises the following steps: firstly, carrying out surface modification on a Cu-SSZ-13 molecular sieve by utilizing a silane coupling agent to obtain a modified molecular sieve CS-K5, and then stably loading the CS-K5 on the surface of the fiber by utilizing an in-situ covalent bonding technology by taking electrostatic spinning polyimide fiber as a carrier to form a bifunctional membrane material with a molecular sieve-silane-polymer ternary interface structure. The obtained bifunctional film is kept at 1t; according to the present invention, the denitration rate at the low temperature of 225 DEG C is not less than 99% while the low pressure drop of 1000 Pa is achieved, the PM 0.3 interception rate is not less than 80%, and the catalyst has advantages of excellent cycle stability, excellent water vapor resistance and excellent sulfur resistance. According to the bifunctional membrane, through the dual mechanisms of Lewis acid reinforcement and fiber network mass transfer optimization, the synergistic enhancement of catalysis and filtration functions is realized, and the bifunctional membrane is suitable for the synergistic purification scene of multiple pollutants such as industrial flue gas and diesel tail gas.

The invention relates to a preparation method of a bifunctional hydrophobic deep eutectic solvent and a method for selectively separating Li < + > in lithium precipitation mother liquor. According to the invention, a compound containing a-C = O group is innovatively selected as a hydrogen bond donor, and a neutral extraction agent containing a-P = O group is matched as a hydrogen bond acceptor, so that a series of bifunctional hydrophobic deep eutectic solvents are constructed. The two components in the bifunctional hydrophobic deep eutectic solvent are both helpful to participate in extraction coordination of Li < + > through physical and quasi-chemical effects, and the two components generate a synergistic effect due to the formation of intermolecular hydrogen bonds, so that the interaction between atoms in the structure is enhanced, and the efficient and selective separation of Li < + > in the lithium precipitation mother liquor is realized. The extraction efficiency of Li < + > can be up to 99.74% within one minute, the separation factor beta Li < + > / Na < + > is 272.7, beta Li < + > / K < + > is 1694.64, and the aim of efficiently extracting Li < + > from the lithium precipitation mother liquor at low cost can be achieved.

The invention discloses a difunctional polyacid-based metal organic framework material, belongs to the technical field of electrochemistry and catalytic chemistry difunctions, and particularly relates to a polyacid-based metal organic framework material, a preparation method thereof, a supercapacitor of the polyacid-based metal organic framework material and application of the polyacid-based metal organic framework material in catalytic synthesis of sulfoxide compounds. The polyacid-based metal organic framework material as a supercapacitor electrode material has very good electrochemical capacity, when the current density is 1A. G <-1 >, the capacitance is 447.5 F.g <-1 >, 278.6 F.g <-1 >, 204.2 F.g <-1 >, 391.9 F.g <-1 > and 289.6 F.g <-1 > respectively, and the capacitance can be kept at 90% or above after 1000 times of constant-current charge-discharge cycles, and the catalytic material can be used as a heterogeneous catalyst and can be applied to the field of high-performance lithium ion batteries, such as lithium ion batteries, lithium ion batteries, lithium ion batteries, lithium ion batteries, lithium ion batteries, lithium ion batteries, lithium ion batteries, lithium ion batteries, lithium ion batteries, lithium ion batteries, lithium ion batteries, lithium ion batteries and lithium ion batteries. The catalyst has excellent catalytic activity in selective catalytic oxidation of thioether compounds, and the selectivity and the conversion rate can reach 99% or above; the catalyst can be repeatedly used for more than 8 times, and the structure and the catalytic activity are not changed; and the preparation process of the polyacid-based catalyst is simple, the condition is mild, the product purity is high, and the polyacid-based catalyst has potential application value in the fields of electrochemistry and catalysis.