45 results about "Anhydrous Zinc Acetate" patented technology

The invention discloses a di-pyrene modified perylene bisimide derivative fluorescent probe and a synthesis method and application thereof, and belongs to the technical field of protein detection. The preparation of the fluorescent probe comprises the following steps that in a protective atmosphere, 1-methyl-2-pyrrolidinone solution of a pyrene sulfonyl derivative is added into a 1-methyl-2-pyrrolidinone solution of perylene; then, anhydrous zinc acetate is added to obtain a mixed solution; next, the mixed solution is stirred; heating reflux is performed for 10 to 15h at 150 to 200 DEG C; after the reaction liquid obtained after the reflux is cooled to the room temperature, filtering is performed to obtain filter liquid; the filter liquid is subjected to acid washing; precipitates occur; suction filtration is performed; filter cake is obtained; the filter cake is washed and dried to obtain the di-pyrene modified perylene bisimide derivative fluorescent probe. The fluorescent probe provided by the invention has the advantages that the chemical stability is high; the response speed is high; the sensitivity is high; the discrimination performance is good; the sample consumption quantity is small; the data collection is simple, and the like. The instant and on-line detection of the protein can be realized. The fluorescent probe provided by the invention can be used for respectively realizing the distinguished detection of various proteins.

A method for preparing a sheet zinc oxide relates to a zinc oxide, in particular to a method for preparing a sheet zinc oxide nano material with a hierarchical structure. The sheet structure has higher sensitivity to ethanol gas. The method for preparing the sheet zinc oxide with high gas sensitivity is provided. Acetic anhydride is dispersed into glycerol, and then put in a long quartz tube, wherein, the ratio of the mass of the acetic anhydride to the volume of the glycerin is less than 1/10; the long quartz tube is put in a tubular furnace for heating and then taken out for cooling to room temperature, then the quartz tube is washed with water, centrifuged and dried to obtain a sheet zinc glycerol precursor which is heated to obtain the sheet zinc oxide. The method has the advantages of wide raw material resources and low price, simple synthesis, simple and convenient operations without any expensive equipment, low-temperature synthesis, low energy consumption and high yield, no use of organic solvents which seriously affect the environment, and no toxic gas during the synthetic process and the method is suitable for large-scale production.

The invention discloses a preparation method for zinc oxide with highly effective photocatalytic activity under sunlight, and relates to photocatalyst, in particular to the preparation method for the zinc oxide with the highly effective photocatalytic activity under the sunlight. The adopted preparation method for the nano-zinc oxide is simple, catalyzer can be repeatedly used, the required equipment is simple, and the photocatalytic efficiency is high. Anhydrous zinc acetate drops to the room temperature after being heated, and the obtained nano-zinc oxide is dried after being washed; the preparation of methyl orange solution is to prepare two kinds of methyl orange solution with different concentrations, and a concentration standard curve and an absorbance standard curve are made by utilizing a spectrophotometer; the ultrasonic sound treatment is performed to the nano-zinc oxide and the methyl orange solution with one concentration under the dark condition, so that the photocatalysis is performed to the mixed solution of the nano-zinc oxide and the methyl orange solution, a sample is taken to be centrifugated, the absorbance of the methyl orange solution is measured on the spectrophotometer, and the concentration of the methyl orange solution is figured out according to the standard curve.

The invention relates to a preparation method of a ZnO quantum dot/graphene oxide composite material, and belongs to the field of graphene oxide composite material. According to the preparation method, graphene oxide is prepared directly, a graphene oxide sample is dispersed in an alcohol solution via ultrasonic dispersion, an obtained mixture is delivered into a thermostat water bath, magnetic stirring is carried out, an alcoholic solution of anhydrous zinc acetate and an aqueous solution of hexamethylenetetramine are added dropwise, reaction is carried out for a preset period of time, an obtained product is subjected to centrifugation and washing for a plurality of times, and an obtained solution is filtered and dried so as to obtain the ZnO quantum dot/graphene oxide composite material. The preparation method is capable of optimizing liquid-phase oxidation process, shortening preparation period, reducing cost, and obtaining graphene oxide with excellent structure performance; relatively high interaction effect between the ZnO quantum dot/graphene oxide composite material with gas molecules is achieved; better gas sensitive detection potential is achieved; and the ZnO quantum dot/graphene oxide composite material is suitable to be used at toxic and harmful environment with explosiveness and flammability.

The invention discloses a synthetic method of a spirocyclic compound containing 1-indanone skeleton. The method comprises the following steps: taking aromatic carboxylic acid and alpha, beta-unsaturated ketone as raw materials, taking any of p-cymene ruthenium chloride dimer, pentamethylcyclopetadienyl rhodium chloride dimmer, tris(acetonitrile)(pentamethylcyclopentadienyl)rhodium bis(hexafluoroantimonate) as a catalyst, taking any of anhydrous manganese acetate, manganese acetate tetrahydrate, anhydrous zinc acetate and zinc acetate as an additive, and thus synthesizing the spirocyclic compound containing 1-indanone skeleton by adopting a one-step method. The reaction comprises four steps such as conjugate addition reaction of aromatic carboxylic acid ortho-position C-H bond and alpha, beta-unsaturated ketone, intramolecular dehydration, Michael addition with second molecular alpha,beta-unsaturated ketone and intramolecular aldol condensation. The synthetic method has the characteristics that the raw materials are low in price and easy to obtain, the efficiency is high, the atom utilization rate is high, the reaction operation is simple and four new C-C bonds are constructed by adopting the one-step method.

The invention relates to a preparation method of a ZnO quantum dot/graphene oxide composite material, and belongs to the field of graphene oxide composite material. According to the preparation method, improved Hummers method is adopted to prepare graphene oxide, a graphene oxide sample is dispersed in a methanol solution in a three-necked flask via ultrasonic dispersion, the three-necked flask is delivered into a thermostat water bath, magnetic stirring is carried out, an alcoholic solution of anhydrous zinc acetate and an aqueous solution of hexamethylenetetramine are added using microsyringes slowly and dropwise, reaction is carried out for a preset period of time, an obtained product is subjected to centrifugation and washing for a plurality of times, and an obtained solution is filtered and dried so as to obtain the ZnO quantum dot/graphene oxide composite material. The ZnO quantum dot/graphene oxide composite material is prepared via water bath at a low temperature; energy consumption is low; experiment is controllable; the preparation method is simple and convenient; cost is low; experimental process is green, and is friendly to the environment; relatively high interaction effect is achieved; better gas sensitive detection potential is achieved; and the ZnO quantum dot/graphene oxide composite material is suitable to be used at toxic and harmful environment with explosiveness and flammability.

The invention relates to a polyvinylidene fluoride nano fibrous membrane and a preparation method thereof. The preparation method comprises the following steps: S1, providing polyvinylidene fluoride,dissolving polyvinylidene fluoride into a mixed solvent of N-N dimethyl formamide and acetone, and performing water-bath, heating and stirring to obtain a uniform transparent solution; S2, adding anhydrous zinc acetate into the transparent solution to obtain a mixture, stirring the mixture to obtain a uniformly-dispersed mixed solution; S3, carrying out electrostatic spinning on the mixed solution, carrying out heat treatment to obtain the polyvinylidene fluoride nano fibrous membrane carried with zinc oxide nano-particles. Compared with the prior art, the preparation method disclosed by the invention has the advantages that a film is formed in one step, an operation is simple, the practicability is strong, high-temperature calcination is not needed, and the cost is lower; the polyvinylidene fluoride nano fibrous membrane carried with the zinc oxide nano-particles, having excellent performance, can be effectively prepared.

The invention discloses a preparation method of a three-dimensional flower-like zinc oxide nanometer material and an obtained product. The method comprises the following steps: mixing anhydrous zinc acetate and ethylene glycol to obtain a transparent solution, adding a mixture of lauryl amine and oleic acid into the transparent solution, and uniformly mixing so as to obtain a precursor solution; raising the temperature of the precursor solution to be 130-140 DEG C under inert gas shielding so as to carry out a reflux reaction, performing centrifugal separation and washing after reaction completion, thereby obtaining the zinc oxide nanometer material, wherein the zinc oxide nanometer material is in the shape of a three-dimensional flower. The process disclosed by the invention is simple and convenient in process flow and short in reaction time, and the obtained product has the flower shape, looks like half a calliandra flower, is controllable in morphology and adjustable in size, has excellent application prospects in the fields of new energy materials and sensing and can serve as an additive of a high-end sun and skin care product.

The invention relates to a synthesis method of an etimicin sulfate intermediate (3,2',6'-tri-N-acetyl gentamicin C1a). The synthesis method comprises the following steps: a, adding 20 L of methanol, 2.70 kg of gentamicin C1a and 3.21 kg of anhydrous zinc acetate into a 50 L three-port bottle at a temperature of 29 DEG C, stirring for 1.5 h to dissolve, and thus obtaining a gentamicin C1a-Zn complex; b, dripping 2.55 L of acetic anhydride into the complex of the step a for acetylation; c, after finishing the reaction, concentrating the reaction liquid of the step b, introducing the concentrated liquid into a chromatographic separation column for charging the sample, rinsing with a salt-free water, resolving with an ethanol water solution, and collecting effective components; concentrating, drying to obtain 3.29 kg of the finished product P1, wherein the yield is 95.3%, and the purity is 96.1%.

The invention belongs to the technical field of light emitting diodes, and particularly relates to a preparation method of a zinc oxide nano material. The method comprises the following steps: obtaining a lithium hydroxide solution and anhydrous zinc acetate; and in a water-free and oxygen-free environment, mixing and dissolving the anhydrous zinc acetate and the lithium hydroxide solution, carrying out thermal reaction, and separating to obtain the zinc oxide nano material. According to the preparation method of the zinc oxide nano material, the lithium hydroxide and the anhydrous zinc acetate serve as raw materials, the zinc oxide nano material is prepared through the thermal reaction in the water-free and oxygen-free environment, the reaction raw materials and reaction condition parameters are reasonably regulated and controlled, so that the prepared zinc oxide nano material has the particle size of 5-7 nanometers, the particle size is small, the dispersion stability is good, and the energy gap is wide and reaches 3.7 eV.

The invention discloses a preparation method of micron hydrogel with colon-specific delivery. The preparation method comprises the following steps of dissolving puerarin and low-methoxy pectin in deionized water, carrying out stirring, dissolving, standing to remove bubbles, then sucking by using a microfluidic device water-phase sampler, and sucking mineral oil dissolved with span 80 by using anoil-phase sampler, wherein water-in-oil micron hydrogel generated by cutting of the microfluidic device flows out of the sample outlet and then enters a chitosan solution containing anhydrous zinc acetate, so that the pectin solution is demulsified and then is crosslinked with chitosan/zinc acetate. The micron hydrogel is used for embedding and releasing puerarin. The micron hydrogel prepared by the method has a colon-specific release effect.

The invention belongs to the technical field of battery materials. The invention discloses a lithium-sulfur battery positive electrode material as well as a preparation method thereof and applicationthereof. The preparation method comprises the following steps: adding anhydrous zinc acetate and thioacetamide into deionized water containing carboxylated multi-walled carbon nanotubes, obtaining a ZnS-QDs/CNT composite material through violent stirring, heating treatment and repeated washing with absolute ethyl alcohol and deionized water, and finally preparing a ZnS-QDs/CNT/S composite materialthrough melt impregnation and sulfur fixation. The invention discloses the positive electrode material of a lithium-sulfur battery. Zinc sulfide quantum dots are uniformly distributed on inner and outer surfaces of one-dimensional nanostructured carboxylated multi-walled carbon nanotubes such that the cycling stability and rate capability of the lithium-sulfur battery can be improved, the shuttleeffect problem is inhibited, the charge transfer is enhanced, the oxidation-reduction kinetics is accelerated, and the electrochemical performance of the battery is improved. A lithium-sulfur batterytaking the positive electrode material as a positive electrode has excellent conductivity, electrochemical performance, good cycle performance and rate capability.

The invention discloses a preparation method of a carbon cloth loaded zinc oxide/silver phosphate composite photocatalytic material, which comprises the following steps: S1, cleaning carbon cloth with acetone, absolute ethyl alcohol and deionized water respectively, soaking the cleaned carbon cloth in nitric acid, and then drying; step S2, dissolving anhydrous zinc acetate in absolute ethyl alcohol, stirring to obtain a first mixed solution, slowly dripping the first mixed solution on the carbon cloth treated in the step S1, and then calcining; s3, dissolving zinc nitrate hexahydrate and hexamethylenetetramine in a mixed solution of ammonia water and deionized water to obtain a second mixed solution; s4, soaking the treated carbon cloth in a second mixed solution, transferring into a reaction kettle, carrying out hydrothermal reaction, self-cooling, taking out, cleaning and drying; and S5, soaking the carbon cloth obtained in the step S4 in a silver nitrate solution, taking out the soaked carbon cloth, soaking the carbon cloth in a diammonium hydrogen phosphate solution, and washing and drying the carbon cloth after multiple times of repeated soaking.

The invention discloses thermoplastic starch based on a coordination effect as well as a preparation method and application of the thermoplastic starch. The preparation method comprises the followingsteps: premixing starch and a plasticizer to obtain a premixed material, adding anhydrous zinc acetate, carrying out further mixing, and carrying out extrusion granulation to obtain the thermoplasticstarch based on the coordination effect. According to the method, through reactive extrusion, efficient coordination of starch hydroxyl and Zn<2+> is realized, and the modified thermoplastic starch with outstanding advantages of high heat resistance, high hydrophobicity, high strength and the like can be obtained only by adding a small amount of anhydrous zinc acetate, the glass transition temperature is improved to 89.1 DEG C, the surface contact angle is improved to 118.2 degrees, and the tensile strength is improved to 9.2 MPa; and the modified thermoplastic starch is biodegradable, green,environment-friendly, excellent in comprehensive performance and easy to process, and is expected to be applied to the fields of packaging, disposable tableware, agricultural mulching films and the like.

The invention discloses a photocatalyst for efficiently photocatalytically decomposing water to produce hydrogen and a preparation method of the photocatalyst. Cadmium zinc sulfide in the photocatalyst is of a granular structure, the diameter of the cadmium zinc sulfide is about 20 nm to 100 nm, MoS2 is of a flower-shaped structure formed by stacking two-dimensional sheets, and cadmium zinc sulfide solid solution particles are evenly distributed on the surface of MoS2. The preparation method comprises the following steps: respectively adding cadmium acetate and anhydrous zinc acetate into absolute ethyl alcohol, uniformly stirring a mixed solution, then adding thioacetamide and MoS2, uniformly stirring again to obtain a raw material solution, transferring the raw material solution into a reaction kettle, reacting at high temperature, cooling the solution to room temperature after the reaction is finished, centrifuging the obtained product through a centrifugal machine, collecting precipitates; and cross-washing the precipitates with deionized water and absolute ethyl alcohol, and drying the washed precipitates in a drying oven to obtain a product, namely the MoS2/Zn0. 5Cd0. 5S photocatalyst. The flower-like metal sulfide (MoS2) and cadmium zinc sulfide are compounded to construct the heterojunction, thereby enhancing the water photolysis hydrogen production performance.

The invention discloses a preparation process of depleted anhydrous zinc acetate. The preparation process comprises the following steps: i) preparing a depleted diethyl zinc n-hexane solution; (ii) performing double decomposition reaction; and (iii) separating a depleted anhydrous zinc acetate product. The purity of the depleted anhydrous zinc acetate product prepared by the method can reach 99.8% or above, product purification is not needed, operation is simple, industrial amplification is easy, and the depleted anhydrous zinc acetate product can be used for preparing a downstream product depleted zinc acetate dihydrate and used for nuclear power zincification; the method is a one-step reaction, the reaction yield can reach 95% or above, and raw materials can be efficiently utilized; and according to the method disclosed by the invention, the depleted diethyl zinc n-hexane solution with a certain concentration is prepared by diluting depleted diethyl zinc with n-hexane, so that the safety coefficient of the reaction can be improved, and the reaction can be completed without inert gas protection.

The invention discloses a preparation method of hydroxylated perylene imide and application thereof. The preparation method comprises the following steps: weighing perylene-3,4,9,10-tetracarboxylic dianhydride, trihydroxymethyl aminomethane and zinc acetate in mole ratio of 1 to (6-10) to 1 as raw materials, adding the raw materials into a reactor filled with N-methyl pyrrolidone, heating to 75-85 DEG C under the nitrogen atmosphere, stirring and mixing for 15min, and then continuously warming to 150-160 DEG C, stirring and reacting for 15-17h to prepare a dark purple mixed liquid; leaching the deep purple mixed liquid, firstly washing the filtered substance for 3-5 times by use of ethanol, and then placing the filtered substance in a vacuum drying oven at 45-55 DEG C and drying for 8-12h to obtain the purple powder, namely, hydroxylated perylene imide. Hydroxylated perylene imide can be applied to the technical field of synthesis of high-performance shape-memory polyurethane material. According to the method disclosed by the invention, the operation is simple, the used reagent raw materials are conventional chemical raw materials, the cost is low, and the method is convenient for large-scale popularization; and the prepared hydroxylated perylene imide can be used for preparing the shape-memory polyurethane material, and further broadens other application fields of perylene besides the dye field.

The invention discloses an experimental device for preparation and post-treatment of anhydrous zinc acetate. The experimental device comprises a reaction device and a post-treatment device which are respectively provided with a stirring mechanism, the reaction device comprises a reaction cavity, a liquid inlet and a solid feeding hole are formed in the upper part of the reaction cavity, a discharge hole is formed in the bottom, and a jacket I is arranged outside the reaction cavity; the post-treatment device comprises a post-treatment cavity, a condensing device, a heat exchanger and a collector which are connected in sequence; and a feeding hole communicated with the discharging hole through a pipeline is formed in the upper part of the post-treatment cavity, a material discharging hole and a liquid discharging hole are formed in the bottom of the post-treatment cavity, a filtering mechanism is arranged at the bottom in the post-treatment cavity, and a jacket II is arranged outside the post-treatment cavity. Solid-liquid separation is achieved through the pipeline and the device, solid-liquid separation can be achieved without transferring feed liquid out during feed liquid aftertreatment, separated solids can be directly dried, the whole process is operated in a closed mode, the feed liquid does not need to be transferred out, operation is easy, and working efficiency is high.

The invention discloses a preparation method and application of a urea PDI polymer/MoS2 catalyst, the preparation method of the catalyst comprises the following steps: taking urea, perylene-3, 4, 9, 10-tetracarboxylic dianhydride, anhydrous zinc acetate and imidazole as raw materials, adopting an organic synthesis method to obtain a urea PDI polymer, and carrying out ball milling to obtain a ball-milled urea PDI polymer/MoS2 composite photocatalyst, the ball milling time being 30-60 min. The urea PDI polymer/MoS2 catalyst prepared by the method is simple in preparation process and high in yield, has the characteristics of large specific surface area and multiple reaction sites, and can activate persulfate under visible light to efficiently catalyze and degrade tetracycline in water.

The invention relates to a microwave preparation method of etimicin sulfate. The method comprises the following steps of a, adding methanol, gentamicin sulfate C1a, sulfuric acid and anhydrous zinc acetate into a microwave reaction kettle at room temperature, and performing stirring and dissolving; b, dropwise adding acetic anhydride in the step a for acetylation; c, performing microwave irradiation in the step b; d, carrying out dezincification treatment on an obtained reaction solution, injecting the reaction solution into a 732 strong acid cation exchange resin column, performing flushing with water until the optical rotation is zero, performing desorption with ammonia water to obtain a desorption solution of a required product, and carrying out reduced pressure concentration; e, addingtetrahydrofuran into a reaction kettle of an obtained oily substance, regulating the pH value with sulfuric acid, dropwise adding acetaldehyde at 15 DEG C, performing stirring, adding sodium borohydride, and performing stirring at room temperature; f, performing evaporating to remove a solvent, adding a sodium hydroxide aqueous solution, and performing microwave irradiation; and g, after the reaction is finished, concentrating the reaction solution, introducing a concentrated solution into a chromatographic separation column for sample loading, performing flushing with salt-free water, performing desorption with an ethanol aqueous solution, collecting effective components, performing concentrating, and performing refining and drying to obtain the finished etimicin sulfate.

The invention discloses anionic Zn (II)-MOF for one-step purification of ethylene, and belongs to the technical field of crystalline materials. The chemical formula of the compound is [Me2NH2]3[Zn14(ATZ)12(iPA-O)6(COO)] (BUT-303). Synthesis of the metal-organic framework is as follows: under closed conditions, an organic ligand 5-hydroxy-isophthalic acid (iPA-OH) and 1, 2, 4-triazole-5-amine (ATZ) are subjected to a solvothermal reaction with zinc nitrate hexahydrate or anhydrous zinc acetate in N, N-dimethylformamide and tetrafluoroboric acid to obtain a crystal of the metal-organic framework material. The metal organic framework material shows the potential of purifying ethylene from C2.