135 results about "Bi functional" patented technology

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 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.

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.

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.

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.

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.

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 belongs to the technical field of polymer catalysis, and discloses a MeOH-difunctional zirconium-based heteropolyacid catalytic system as well as a preparation method and application thereof. The preparation method comprises the following steps: S1, preparing a sodium tungstate aqueous solution and a sodium metasilicate aqueous solution, adding a hydrochloric acid solution and the sodium metasilicate aqueous solution into the sodium tungstate aqueous solution, adjusting the pH value, standing, and adding potassium chloride to obtain SiW-1; s2, dissolving SiW-1 in deionized water, adjusting the pH value, standing, and adding potassium chloride to obtain SiW; and S3, dissolving SiW in deionized water, adjusting the pH value, adding a zirconium oxychloride aqueous solution, adjusting the pH value again, adding cesium chloride, stirring, carrying out suction filtration, collecting precipitate, grinding into powder, and adding the powder into MeOH to obtain the heteropolyacid catalytic system. The heteropolyacid catalytic system disclosed by the invention is excellent in catalytic effect, simple and convenient to prepare and capable of being recycled.

This invention discloses a ZnCoSe / NC bifunctional catalyst, its preparation method, and its applications, belonging to the field of electrocatalytic materials technology. Addressing the technical problems of insufficient catalytic activity and limited active site types in existing transition metal selenide electrocatalysts, the catalyst prepared in this invention comprises a nitrogen-doped carbon support, ZnSe and CoSe particles supported on the support, and Co single atoms dispersed within the support. By rationally controlling the proportions and interfacial structures of each component, a highly efficient synergistic catalytic system is constructed. The ZnCoSe / NC catalyst exhibits excellent ORR performance, and the current retention rate remains at 97.6% after a 10-hour stability test; it also demonstrates competitive oxygen evolution reaction (OER) activity. This invention develops a high-performance, low-cost ORR / OER bifunctional electrocatalyst, providing new ideas and methods for the design and preparation of non-noble metal-based bifunctional catalysts.

Disclosed are bifunctional compounds (degraders) that target ALK for degradation. Also disclosed are pharmaceutical compositions containing the degraders and methods of using the bifunctional compounds to treat diseases and disorders characterized or mediated by aberrant ALK activity.

The invention discloses a bifunctional molecular group structure for photoresist. The bifunctional molecular group structure comprises a linker, PAG molecules and PDQ molecules. And the linker contains a carbon-oxygen chemical bond or a carbon-nitrogen chemical bond. PAG molecules and PDQ molecules are synthesized on each linker at the same time, wherein the number of the PAG molecules and the number of the PDQ molecules are in proportion, and the total number of the PAG molecules and the PDQ molecules is three or more. And PAG molecules are synthesized on the linker through a carbon-oxygen chemical bond. PDQ molecules are synthesized on the linker through a carbon-nitrogen chemical bond. The invention also discloses a synthesis method of the bifunctional molecular group structure for the photoresist. The invention also discloses a use method of the photoresist adopting the bifunctional molecular group structure. According to the invention, the proportion of PAG molecules to PDQ molecules can be set, so that the uniformity of PAG and PDQ in the photoresist can be ensured, the uniformity and roughness of the line width of the photoresist can be ensured, and different requirements of users on the contrast ratio and light sensitivity of chemical amplification glue can be met at the same time.

The application provides a preparation method of a bifunctional electrocatalyst. The bifunctional electrocatalyst is obtained by mixing FeCl3.9H2O, CoCl2.6H2O and NiCl2.6H2O with black polypyrrole powder, freeze-drying and annealing at 800 DEG C. The catalyst prepared by the method has excellent catalytic performance in OER / ORR reactions, and the preparation process is simple, the requirements for equipment and process conditions are low, and the catalyst is conducive to popularization and application. The application is applied to a zinc-air battery as an air positive electrode, and has excellent charge-discharge performance and cycle stability.

The invention relates to the technical field of supramolecular chemistry and high polymer materials, in particular to a method for preparing polyrotaxane based on cyclodextrin accurate rotaxane and oxidative glutathione cross-linking end capping and polyrotaxane. The method comprises the following steps: a) dissolving cyclodextrin and polyethylene glycol diacrylate in an alkaline aqueous solution or water, and carrying out self-assembly inclusion to form pseudorotaxane; and b) under an alkaline condition, adding oxidized glutathione into the quasi rotaxane solution, and carrying out Michael addition cross-linking reaction to realize end capping, thereby obtaining the polyrotaxane. According to the preparation method, the GSSG is adopted as the difunctional crosslinking end-capping reagent for the first time, the difunctional characteristic of the GSSG is utilized, the GSSG serves as the difunctional crosslinking end-capping reagent and reacts with multiple acrylate groups at the tail ends of the pseudorotaxane at the same time, a three-dimensional crosslinking network is formed, and the prepared polyrotaxane has excellent mechanical properties and unique dynamic slip ring characteristics, and can be applied to the field of chemical engineering. And the method has stimuli responsiveness to a reducing environment.

The invention relates to a preparation process of a bifunctional Ru / C catalyst applied to coupling thermocatalytic methanol dehydrogenation and electrocatalytic hydroxidation reaction, belonging to the technical field of methanol hydrogen production. TDI industrial waste residue is used as a raw material, and through the links of pyrolysis activation, supercritical methanol modification, bimetal freezing loading, activation, interface bonding construction, hydrophobic layer coating and the like, the Ru / C catalyst is prepared. The catalyst solves the problems that an existing Ru / C catalyst is sensitive to CO poisoning, easy to sinter at a high temperature, high in component and the like, the Ru utilization rate is high, the activity attenuation is reduced after long-time operation, the components are effectively reduced, and the catalyst is suitable for the process requirements of methanol hydrogen production-synthesis gas co-production.

This invention discloses the construction and application of a biosensor based on autocatalytic induced emission amplification and a bifunctional peptide, belonging to the fields of electrochemiluminescence, sensing analysis, and nanomaterials technology. In this invention, by integrating recognition (HWRGWV), charge neutralization (DE), antifouling (DKDKDKDKDK), and anchoring (C) fragments, a bifunctional peptide with antibody-targeted immobilization and interfacial anti-adsorption properties was designed, improving the target capture efficiency and antifouling capability at the interface. Simultaneously, AuAgTb-MOF with a synergistic amplification effect was developed as the luminescent agent. Specifically, 3,5-dicarboxyphenylboronic acid is used to enhance the Tb... 3+ Antenna effect and Ag NPs on S2O8 2‑ The catalysis significantly promoted the luminescence of AuAgTb-MOF. The intramolecular self-enhanced design of AuAgTb-MOF not only reduced energy transfer loss but also simplified the construction of the biosensor. Based on this, the constructed biosensor exhibited a fluorescence intensity of 3.38 × 10⁻⁶. ‑5 The low detection limit of U / mL enables sensitive and accurate detection of the biomarker carbohydrate antigen 242, providing a positive reference for the clinical diagnosis of pancreatic cancer.

The invention relates to a bifunctional solid amine adsorbent and a preparation method and application thereof, and the preparation method comprises the following steps: (1) grafting: firmly bonding amino silane on the surface of a carrier through a chemical grafting method to form a first amine grafting layer; and (2) dipping: loading high-density amine molecules into the residual pore channels of the carrier with the amine grafting layer by a physical dipping method to obtain the dual-functional solid amine adsorbent. Compared with the prior art, the invention breaks through the bottleneck of poor oxidation stability of the traditional adsorbent through a dual-functional synthesis method of grafting first and then impregnation, and provides a low-cost, efficient and green solution for long cycle life of the adsorbent in the field of flue gas carbon capture.