485results about How to "The synthesis method is simple" patented technology

The invention discloses a tryptamine compound as well as a preparation method and application thereof. The tryptamine compound can be used for preparing medicines for preventing and / or treating cancers. The cancer is at least one of breast cancer, liver cancer, lung cancer, colorectal cancer, leukemia, pancreatic cancer, glioma, osteosarcoma, cervical cancer, ovarian cancer, kidney cancer and esophageal cancer. According to the invention, activity screening is carried out on a plurality of compounds, the three tryptamine compounds provided by the invention are found to have excellent inhibitory activity on a plurality of different types of human cancer cells for the first time, and an optional scheme is provided for broad-spectrum anti-cancer drugs.

The invention belongs to the technical field of sodium ion batteries, and mainly relates to a multi-metal element in-situ doped sodium ferric sulfate positive electrode material prepared from byproduct sulfate, a method thereof and a sodium ion battery. The method comprises the following steps: adding solid waste sodium sulfate, anhydrous sodium sulfate, by-product ferrous sulfate and ferrous sulfate heptahydrate into deionized water, stirring until the mixture is fully dissolved, and filtering and separating insoluble substances to obtain a sodium ferric sulfate precursor solution; adding an organic carbon source and an inorganic carbon source into the precursor solution, fully stirring and mixing, and performing spray drying to obtain a precursor; and sintering the precursor in an inert atmosphere to obtain the multi-metal element in-situ doped sodium ferric sulfate positive electrode material. According to the method, two byproducts sodium sulfate and ferrous sulfate are utilized, and an organic carbon source and an inorganic carbon source are matched for use to obtain a carbon-coated material, so that the cost of a sodium ferric sulfate raw material of a sodium-ion battery is reduced to the greatest extent, and the sodium ferric sulfate positive electrode material with ultralow cost and good electrochemical performance is prepared.

The invention discloses carbon-coated lithium iron phosphate, a preparation method thereof and a lithium battery, and the preparation method of the carbon-coated lithium iron phosphate comprises the following steps: (1) mixing an iron phosphate precursor and a fullerene solution, and then drying to obtain a fullerene-coated iron phosphate precursor; wherein a solvent of the fullerene solution is a non-aqueous solvent; (2) mixing the fullerene-coated iron phosphate precursor, a lithium source, a metal ion dopant and a carbon source, carrying out ball milling to obtain a mixture, and drying the mixture; the metal ion dopant comprises a metal doping element; and (3) sintering the dried mixture in a protective atmosphere to obtain the carbon-coated lithium iron phosphate. According to the method, the conductivity of the carbon-coated lithium iron phosphate material can be improved, the powder resistance of the material is reduced, and the energy efficiency of the battery is improved.

The invention discloses a preparation method and application of a manganese-based amino acid coordination polymer, and belongs to the technical field of nano-enzymes and nano-drugs. Divalent manganese salt, histidine and other amino acids are subjected to a co-precipitation reaction to prepare the manganese-based amino acid coordination polymer, and the polymer is of a nanoparticle structure, small in size and high in stability, has enzyme-like activity, catalyzes hydrogen peroxide to generate high-toxicity hydroxyl free radicals and is used for specifically killing tumor cells. The catalyst has the capability of catalytically generating singlet oxygen in the presence of hydrogen peroxide. Meanwhile, the manganese-based amino acid complex has glutathione oxidase-like activity, consumes glutathione to overcome the resistance of tumors to oxidative stress, improves the chemical kinetic curative effect, and has anti-tumor application potential.

The invention relates to a decarboxylation coupling method catalyzed by N-heterocyclic carbene. Small organic molecule N-heterocyclic carbene is used as an organic catalyst, manganese is used as a reducing agent, aromatic acid or derivatives thereof and an electrophilic reagent are subjected to cross coupling, and multi-structure ketone is prepared. Small organic molecule N-heterocyclic carbene is used as an organic catalyst, manganese is combined as a reducing agent, cross coupling of aromatic acid or derivatives thereof and some cheap and easily available electrophilic reagents can be promoted, ketones with various structures can be provided at high yield, and the method is especially suitable for preparation of high-steric-hindrance ketone compounds and has wide application prospects. The method has the advantages of high yield, convenience in separation, high efficiency, mildness, low-cost economy and high industrial application value, and the requirement on transition metal catalysis can be reduced.

The invention discloses methotrexate-loaded sulfonated bacterial cellulose / chitosan hydrogel for treating psoriasis and a preparation method of the methotrexate-loaded sulfonated bacterial cellulose / chitosan hydrogel. The method comprises the following steps: firstly, loading methotrexate by using sulfonated bacterial cellulose, and then coupling with chitosan to form the methotrexate-loaded sulfonated bacterial cellulose / chitosan hydrogel. The synthesis method is simple, the prepared methotrexate-loaded sulfonated bacterial cellulose / chitosan hydrogel can promote the transdermal release effect of methotrexate and control the release speed of methotrexate, skin inflammation caused by psoriasis is continuously and effectively relieved, and the methotrexate-loaded sulfonated bacterial cellulose / chitosan hydrogel has good biological safety.

The invention relates to the field of photoelectrocatalysis, and provides a preparation method and application of a cerium-based double-layer composite material coated with indium zinc sulfide, and the preparation method comprises the following steps: dispersing Ce (IV)-MOF in DMF and methanol, adding a hydroxyl-containing organic ligand, carrying out room temperature ultrasonic treatment to obtain modified MOF, dispersing the modified MOF in water and glycerin, adding a zinc salt and an indium salt, stirring, adding thioacetamide, stirring, filtering, washing, and drying to obtain the cerium-based double-layer composite material coated with indium zinc sulfide. And heating to obtain the product indium zinc sulfide coated cerium-based double-layer composite material. According to the invention, an ultrasonic-assisted MOF ligand exchange technology is utilized, so that an MOF regular octahedral framework structure is well maintained; the ZnIn2S4 material is compounded through in-situ growth of ZnIn2S4, the compounding synthesis temperature and a solution system are optimized, a ZnIn2S4 double-layer coating structure is obtained, and the yield and dispersity of ZnIn2S4 are improved. And the prepared ZnIn2S4 / MOF composite material has excellent reaction efficiency and stability of photoelectrocatalytic hydrogen production.

According to the application of the ZIF-8 coated hemoglobin composite material in preparation of the lithium-sulfur battery, an enzyme solution, an organic ligand and metal ions are co-precipitated through in-situ biomineralization to prepare an MOF-enzyme compound, the method is not influenced by the size of enzyme molecules, the synthesis condition of ZIF-8 is mild, the structure of enzyme cannot be damaged in the reaction process, and the preparation method is simple and easy to implement. And the synthesis process has the advantages of short reaction time, no need of other organic solvents, capability of expanding multiple synthesis, simple synthesis method and high yield. The results of XRD, FIIR and XPS experiments show that the MOF (at) enzyme compound prepared by the method preserves the inherent structure of the enzyme, and when the MOF (at) enzyme compound is assembled into a battery, the electrochemical performance and the dynamic performance of the battery containing ZIF-8 (at) Hb are better.

The invention relates to a color developing agent embedded CuMOFs nano-enzyme paper-based sensor and a preparation method and application thereof.The preparation method comprises the steps that water-soluble TMB-NPs is prepared from water-insoluble typical peroxide mimic enzyme color developing substrates TMB and BSA, the water-soluble TMB-NPs is embedded in CuMOFs in situ through a coprecipitation method, and CuMOFs-TMB-NPs is obtained; the synthesis method is simple and convenient, and the synthesized material has excellent enzyme-like activity and stability. Then, qualitative filter paper is used as a paper-based material, CuMOFs-TMB-NPs is uniformly coated on the paper-based material, and the paper-based sensor of H2O2 and AMP is constructed based on the paper-based material. The CuMOFs disintegrates in an acid environment to release TMB-NPs and a large amount of Cu < 2 + >, the TMB-NPs serves as an enzyme catalysis substrate, and the Cu < 2 + > serves as a catalyst to participate in subsequent reaction. The paper-based sensor can be used for visual detection of H2O2 and AMP in a water body.

The invention provides a self-supporting carbon-based material loaded with iron nanoparticles as well as a preparation method and application of the self-supporting carbon-based material, and belongs to the technical field of preparation and application of an electrocatalyst for removing nitrate in sewage. The preparation method of the self-supporting carbon-based material loaded with the iron nanoparticles comprises the following steps: providing a carbon felt subjected to acid pickling and water bath heating; the method comprises the following steps: mixing an iron precursor and urea in a solvent to obtain a mixed solution containing iron salt; and mixing the carbon felt with the mixed solution containing the iron salt, and carrying out a hydrothermal reaction to obtain the self-supporting carbon-based material loaded with the iron nanoparticles. When the iron nanoparticle-loaded self-supporting carbon-based material provided by the invention is used as a cathode for electro-catalysis of nitrate-containing wastewater, a good removal rate and ammonia nitrogen selectivity are achieved, and the catalyst can keep relatively high nitrate nitrogen removal and ammonia nitrogen production effects under the conditions of acidity, neutrality, alkalinity and different initial nitrate concentrations; the method has the advantages of high removal efficiency, good ammonia nitrogen selectivity, strong stability and the like.

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 provides a PtCo-based composite catalyst and a preparation method and application thereof.The PtCo-based composite catalyst comprises a carrier and a load, the carrier comprises mesoporous carbon, the load comprises platinum-cobalt-based metal particles and a compound with the chemical formula being HxMO3, and M comprises W or / and Mo; a contact interface exists between the platinum-cobalt-based metal particles and the compound with the chemical formula of HxMO3; the platinum-cobalt-based metal particles comprise a first part of the platinum-cobalt-based metal particles, and the first part of the platinum-cobalt-based metal particles are supported in the mesoporous structure of the mesoporous carbon. According to the PtCo-based composite catalyst, a contact interface exists between HxMO3 and PtCo-based metal particles, the catalytic activity of platinum and cobalt can be improved, and reduction of oxygen on the surface of the catalyst is facilitated; part of platinum-cobalt-based metal particles are supported in a mesoporous structure of mesoporous carbon, so that the stability of the catalyst can be improved.

The invention discloses a bimetallic MOF material and a preparation method and application thereof. The preparation method comprises the following steps: dispersing organic lanthanum salt, organic ferric salt and organic ligand in an organic solution, stirring, and carrying out ultrasonic treatment to obtain a mixed solution; adding alkali into the mixed solution, and then carrying out ultrasonic treatment to obtain a precursor; heating the precursor in an oil bath, and naturally cooling after the reaction is finished; the reactants are separated, dried and ground into powder, and the bimetallic MOF material is obtained. The bimetallic MOF material has adsorption and fluorescence detection functions. The bimetal MOF material prepared by the method disclosed by the invention has very high adsorption capacity on fluorine ions in water, and the maximum adsorption capacity of the bimetal MOF material reaches 400.860 mg / g. And the detection limit of the linear range is 0-80 [mu] M.

The invention discloses an amino-bridged triaryloxy rare earth metal complex and a preparation method and application thereof, the amino-bridged triaryloxy rare earth metal complex is prepared by reaction of a tricyclopentadienyl rare earth compound and amino-bridged triphenol, and the preparation method is simple to operate, convenient to separate and purify, low in raw material cost and mild in reaction condition. The amino-bridged triaryloxy rare earth metal complex provided by the invention can be used for catalytic oxidation of chalcone compounds and cycloaddition reaction of carbon dioxide, the reaction conditions are relatively mild, the universality of reaction substrates is wide, the reaction time is short, the yield of target products is high, and the reaction operation process is simple.

The invention discloses a method for preparing a low-temperature flue gas denitration catalyst by utilizing electrolytic manganese anode mud, comprising the following steps: step one, material selection; step two, drying and grinding; step three, leaching; step four, solid-liquid separation; step five, multiple washing and filtering; wherein in the above step one, firstly, electrolytic manganese anode mud is selected as the raw material for preparing the low-temperature flue gas denitration catalyst; wherein in the above step two, the electrolytic manganese anode mud selected in step one is placed in a drying box for drying treatment. The invention has a simple synthesis method, and the raw materials used are from industrial waste residues, thereby reducing the impact on the environment. At the same time, the synthesized catalyst is conducive to efficient operation at ultra-low temperature, expanding the application scenarios of the catalyst, and at the same time, the electrolytic manganese anode mud is modified by soluble chloride salt, and the modification treatment of the electrolytic manganese anode mud is utilized, thereby greatly reducing the complexity of the subsequent process for preparing the catalyst.

The invention discloses a preparation method and application of a boron and fluorine co-doped potassium ion battery positive electrode material, the chemical formula of the boron and fluorine co-doped potassium ion battery positive electrode material is K < 0.5 > Mn < 0.73 > Ni < 0.22 > B < 0.05 > F < 0.05 > O < 1.95 >, bond energy of O-O and TM-O is changed through introduction of boron and fluorine, TM atom spacing is reduced, and interlayer spacing is increased, so that a wider ion transmission channel can be provided, and the service life of the battery is prolonged. And structural deformation is inhibited. In addition, introduction of boron and fluorine inhibits irreversible release of oxygen anions, and side reactions are reduced. The crystal structure of the manganese-based layered metal oxide positive electrode material is synergistically regulated by anions and cations, so that the prepared boron and fluorine co-doped potassium ion battery positive electrode material has good cycling stability and excellent rate capability.

The invention belongs to the technical field of battery materials, and mainly relates to a method for preparing an inorganic carbon composite sodium ferric sulfate positive electrode material under the assistance of reduced iron powder and a sodium ion battery. The method comprises the following steps: adding sodium sulfate, ferrous sulfate and reduced iron powder into deionized water, stirring until the sodium sulfate and the ferrous sulfate are completely dissolved, and separating the residual reduced iron powder to obtain a sodium ferric sulfate precursor solution; mixing the sodium ferric sulfate precursor solution with an inorganic carbon source, stirring, and carrying out spray drying to obtain an inorganic carbon composite sodium ferric sulfate positive electrode material precursor; and sintering the precursor in an inert atmosphere to obtain the inorganic carbon composite sodium ferric sulfate positive electrode material. According to the method, ferric iron is reduced into ferrous iron with electrochemical activity by using the reducing iron powder, and the inorganic carbon source is used as the conductive agent, so that the problem of poor conductivity of the material caused by incomplete decomposition of the organic carbon source in the sintering process is avoided, the pure-phase sodium ferric sulfate positive electrode material with high conductivity is synthesized and prepared, and the electrochemical performance of the material is improved.

The invention discloses a polymer stationary phase carrier for DNA synthesis as well as a preparation method and application of the polymer stationary phase carrier. The polymer stationary phase carrier comprises a polymer substrate, and the surface of the polymer substrate is provided with active functional groups such as ester groups, carboxyl groups, halogen or hydroxyl groups, so that the polymer substrate can be modified; the surface of the polymer substrate is modified with a first functional group, the first functional group is covalently bonded with the polymer substrate, and the first functional group is a functional group capable of reacting with an ester group, a carboxyl group or halogen; the surface of the polymer substrate is also modified with a functional group, and the functional group is a group capable of generating a click reaction; the polymer stationary phase carrier further comprises an initiation chain coupled to the polymer substrate through the functional group; and the initiating chain is coupled with the surface of the polymer substrate with the modified functional group through the second functional group. The stationary phase carrier disclosed by the invention can be used for carrying out a biological DNA synthesis reaction, and has relatively high yield and accuracy.

The invention discloses a preparation method of foam composite self-floating sponge and photo-thermal interface evaporation application of the foam composite self-floating sponge. In the foaming process of preparing the porous sponge, the step of adding hydrophobic foam particles in situ is introduced, and the composite material which can rapidly absorb and guide water and has the self-floating characteristic is prepared through a one-step method. The composite material disclosed by the invention can simultaneously meet the dual functions of water absorption, water diversion and self-floating. When the composite material is used as a substrate material of a photo-thermal interface evaporation system, a spontaneous, continuous and stable outdoor evaporation process can be ensured. Under the condition of simulating 1 solar radiation (1000 W / m < 2 >), the technology realizes the water evaporation rate up to 1.86 kg.m <-2 >. H <-1 >; and under natural sunlight irradiation (about 435 W / m < 2 >), the average sewage evaporation rate reaches 1.70 kg.m <-2 >. H <-1 >, and the daily average sewage evaporation capacity is 12.0-14.0 kg.m <-2 >.

The invention provides a method for constructing planar chiral [2, 2] paracyclophane by cobalt-catalyzed asymmetric carbon-hydrogen bond activation-kinetic resolution, which comprises the following steps: by using a cobalt catalyst, a chiral ligand and an additive, taking a graphite felt electrode as an anode and taking a platinum sheet electrode as a cathode, carrying out racemization on [2, 2] paracyclophane under the condition of direct-current electrolysis, so as to obtain the planar chiral paracyclophane. The preparation method comprises the following steps: carrying out asymmetric carbon-hydrogen bond dehydrogenation coupling / kinetic resolution on 2, 2] paracyclophane formamide and aryl acid, and after the reaction is finished, carrying out corresponding post-treatment to obtain planar chiral [2, 2] paracyclophane formamide and planar chiral oxopara-[2, 2] paracyclophane; according to the method, electrochemical synthesis of planar chiral oxara-[2, 2] paracyclophane is realized through a method for catalyzing asymmetric carbon-hydrogen bond activation by virtue of a crustal high-yield transition metal, a reaction substrate is wide in universality and excellent in stereoselectivity, and a product and a split and recycled raw material can have an excellent ee value (up to gt; 99% ee) and a splitting factor (up to 1057).

The invention discloses a high-entropy positive electrode material of a potassium ion battery and a preparation method and application of the high-entropy positive electrode material, the high-entropy positive electrode material is a layered oxide with a P2 / rock salt biphase symbiotic structure, the chemical general formula of the high-entropy positive electrode material is K < 0.6 > Mn < 0.75-x > Ni < 0.1 > Ti < 0.1 > Mg < x > Cu < 0.05 > O2, and x is more than 0 and less than or equal to 0.1. A high-temperature solid-phase method is adopted in the preparation process, the high-entropy layered oxide positive electrode material with symbiotic two phase structures of P2 and rock salt is finally formed by regulating and controlling the types and the content of doped elements, sliding of a TM layer in the charging process and large structural stress generated in the circulating process are relieved through introduction of a small amount of rock salt phase, and the performance of the positive electrode material is improved. And lattice distortion and cracks in particles in the long circulation process are improved, so that the electrochemical circulation stability and rate capability of the potassium ion battery are remarkably improved.

The invention discloses a carbon nitride loaded metal diatom photocatalytic material as well as a preparation method and application thereof. The invention belongs to the field of photocatalytic materials. The invention aims to solve the technical problems of complex preparation process and low photocatalytic efficiency of the existing metal diatom photocatalyst. The method comprises the following steps: dissolving a nitrogen source and a phosphorus source in deionized water, and carrying out hydrothermal reaction to obtain a precursor; dissolving the precursor in a mixed solvent of alcohol, and then refluxing at constant temperature for a certain time to obtain a pre-product; and adding a metal compound solution capable of forming a conjugated system into the pre-product, carrying out ultrasonic treatment, heating in a constant-temperature water bath kettle, and calcining to obtain the carbon nitride loaded metal diatom photocatalytic material. The obtained photocatalytic material has the advantages of high visible light utilization rate, low photo-induced electron-hole recombination rate and high electron transfer rate. The method is used in the fields of photocatalytic hydrogen production, carbon dioxide reduction and organic matter oxidation.

The invention provides a method for preparing a nitrogen, phosphorus and sulfur tri-doped hollow carbon nanocage material derived from a covalent triazine polymer. The method comprises the following steps: by taking zinc nitrate hexahydrate and 2-methylimidazole as reactants and methanol as a solvent, stirring at room temperature to synthesize ZIF-8; the preparation method comprises the following steps: by taking phosphonitrilic chloride trimer and bisphenol S as monomers and ZIF-8 as a template agent, carrying out polymerization under the induction of an N, N-diisopropylethylamine initiator so as to generate ZIF-8 (at) PZS; and performing high-temperature pyrolysis to synthesize the nitrogen, phosphorus and sulfur triple-doped hollow carbon nanocage material. The invention also discusses the application of the nitrogen, phosphorus and sulfur tri-doped hollow carbon nanocage material in an air electrode material of a zinc-air battery. Meanwhile, the conductivity and the oxygen reduction reaction electro-catalytic performance of the obtained carbon material are remarkably improved through the nitrogen, phosphorus and sulfur doped synergistic effect, the half-wave potential of the carbon material reaches up to 0.85 V vs. RHE, and the limiting current density can reach 5.19 mA cm. A zinc-air battery assembled by using the material as an air electrode shows high peak power density of 194 mW cm.

The invention discloses a Cu-doped Bi2O2CO3 nanosheet catalyst as well as a preparation method and application thereof, and belongs to the technical field of electrocatalytic carbon dioxide reduction. The preparation method comprises the following steps: 1) uniformly stirring and mixing water, acetic acid and ammonia water in a reaction container to form a mixed solution I, weighing copper nitrate and bismuth nitrate, adding the weighed copper nitrate and bismuth nitrate into the mixed solution I, and stirring to form a mixed solution II; and 2) transferring the mixed solution II into a reaction kettle, putting the reaction kettle into a drying oven for hydrothermal reaction, and after the hydrothermal reaction, naturally cooling, centrifuging, washing, drying and grinding to obtain Cu-doped Bi2O2CO3 nanosheet catalyst powder. The catalyst is obtained through a one-step hydrothermal method and has excellent selectivity and good stability on reduction of carbon dioxide into formic acid through electro-catalysis, the performance is excellent, the preparation method is simple, the cost of raw materials is low, the yield is high, and large-scale production is easy.

The present invention relates to a three-dimensional covalent organic framework@metal halide perovskite composite material and a preparation method and application thereof. The method comprises the following steps: in a first solvent, BTD, Por-8NH 2 The 3D COF material is reacted with TPDA, and then subjected to post-treatment after the reaction to obtain a 3D COF material; in a second solvent, the 3D COF material is reacted with lead halide, and then subjected to post-treatment after the reaction to obtain a 3D COF@PbX 2 Materials; In the third solvent, 3D COF@PbX 2 The material reacts with methylamine iodine, and after the reaction, 3D COF@MAPbX is obtained by post-treatment. 3 Composite material. 3D COF@MAPbX of the present invention 3 The composite material can be used as a photocatalyst, and has the advantage of good photocatalytic activity; in addition, the preparation method of the present invention enables the perovskite quantum dots to grow in situ in the pores of the COF, which is used to solve the problems of poor stability of the perovskite quantum dots in the environment and insufficient photocatalytic activity.

The invention discloses a water-soluble organic ionic salt and a synthesis method and application thereof, and belongs to the technical field of antibiosis. Comprising the following steps: 1) preparing a first intermediate QBr; (2) preparing a second intermediate YDOBr; and 3) adding YDOBr into pyridine, uniformly stirring, reacting at 75-85 DEG C for 16-20 hours, cooling the system to room temperature, separating out orange red solid, carrying out suction filtration, and washing a filter cake with dichloromethane to obtain orange solid, namely the target product water-soluble organic ion salt YDOPy. The synthesis method of the water-soluble organic ionic salt is simple and convenient, and pyridine ionic salt is introduced based on a core element of indandione to realize the antibacterial property of the water-soluble organic ionic salt.

The invention provides a yellow long-afterglow ceramic low-temperature overglaze color pigment as well as a preparation method and application thereof, and belongs to the technical field of ceramic pigments. Noctilucent powder SrAl2O4: Eu < 2 + > and Dy < 3 + > and fluorescent powder Y3Al5O12: Ce < 3 + > or Y3Al5O12: Ce < 3 + > and Gd < 3 + > are combined according to different proportions to form a yellow long-afterglow luminescent pigment, then the yellow long-afterglow luminescent pigment is mixed with a glaze surface combination auxiliary agent, and the low-temperature overglaze color pigment with yellow long-afterglow emission is obtained by utilizing a new principle and technology of energy transfer and reflection-compensation, can be fired on a glaze surface at a relatively low temperature, and has the characteristics of long-afterglow emission and long-afterglow emission. Bright yellow body color is displayed under sunlight or an artificial light source; in the dark, afterglow emission which is adjustable from yellow green to yellow is shown. The yellow long-afterglow ceramic low-temperature overglaze color pigment provided by the invention can improve the unique decorative effect of porcelain, enrich the color of the porcelain and improve the added value of ceramic products, and is a novel luminous pigment with excellent performance.

The invention belongs to the technical field of molecular sieve synthesis, and discloses a preparation method for crystal transformation synthesis of an ANA type molecular sieve. The preparation method comprises the following steps: mixing an inorganic alkali solution with a Y-type molecular sieve, and crystallizing; and sequentially drying and grinding the crystallized product to obtain the ANA type molecular sieve. Through the key guiding effect provided by Na < + > ions in the molecular sieve crystal transformation process, template-free synthesis of the ANA type molecular sieve is realized, and dependence of ANA type molecular sieve synthesis on an organic template agent is eliminated. Besides, the Y-type molecular sieve is used as a silicon-aluminum source, so that the cost is reduced, the production efficiency is improved, the environmental pollution is reduced, and favorable conditions are provided for large-scale production of the ANA type molecular sieve. The prepared ANA type molecular sieve has the advantages of high purity, good crystallinity and price, and fully meets the market demand.

The invention discloses a cobalt complex with cyano-modified tetrapyridine as a ligand, a synthesis method and application thereof. The synthesis method of the cobalt complex with cyano-modified tetrapyridine as a ligand is to dissolve the ligand 4′,4″-dicyano tetrapyridine in a mixed solvent of methanol and dichloromethane, then add a cobalt salt, stir the obtained mixture at room temperature for 24 hours, filter and remove insoluble matter after the reaction, remove the organic solvent by rotary evaporation, and wash the obtained solid with water, ethanol and dichloromethane respectively to prepare the cobalt complex with 4′,4″-dicyano tetrapyridine as a ligand. The synthesis method of the invention has the advantages of simple process, high yield, mild reaction conditions, simple product purification treatment method, etc. The cobalt complex with 4′,4″-dicyano tetrapyridine as a ligand synthesized by the invention has good catalytic activity for the photocatalytic selective reduction of carbon dioxide to formic acid under normal temperature and pressure conditions, and the TON (turnover number) can reach 1048, and has good potential application prospects.

The invention relates to a three-cluster galactose compound, a conjugate as well as a preparation method and application of the three-cluster galactose compound. Specifically, the invention relates to compounds of formula (I) and conjugates of the compounds and drug molecules. The invention also relates to a preparation method of the compound, and application of the compound and the conjugate in preparation of drugs for treating or preventing diseases related to expression or overexpression of genes in hepatocytes. # imgabs0 #