771results about How to "Meet the requirements of green chemistry" patented technology

The invention relates to a divalent metal ion pre-embedded layered vanadium oxide nanometer material as well as a preparation method thereof. The chemical formula of the nanometer material is AxV2O5-y, wherein A is Mg, Ca, Sr or Zn; the MgxV2O5-y has the nanoribbon diameter of 100-1500nm and the length of 5-50 microns or CaxV2O5-y has the nanoribbon diameter of 100-1000nm and the length of 5-50 microns or SrxV2O5-y has the nanoribbon diameter of 100-1000nm and the length of 5-50 microns or ZnxV2O5-y has the nanoribbon diameter of 100-300nm and the length of 5-50 microns or ZnxV2O5-y has the nanoflower diameter of 3-5 microns. The divalent metal ion pre-embedded layered vanadium oxide nanometer material disclosed by the invention has high specific capacity, excellent cycling stability and excellent rate capability and is a potential high-performance commercial zinc ion battery positive electrode material.

The invention relates to a sodion-embedded manganese dioxide nanometer sheet electrode as well as a preparation method and an application of the electrode. The electrode can be used as the active material of a supercapacitor and comprises sodion-embedded manganese dioxide nanometer sheets evenly distributed on the surface of a foamed nickel substrate. The preparation method comprises the following steps of: (1) mixing sodium sulfate and manganese acetate to prepare an electrochemical deposition precursor solution; (2) setting up an electrochemical deposition platform through a three-electrode method and taking the foamed nickel substrate after pretreatment as a working electrode, a platinum electrode as a counter electrode and a saturated calomel electrode as a reference electrode; (3) soaking the electrodes in the electrochemical deposition precursor solution at same depth; (4) opening an electrochemical workstation, setting the working electrode to the anode, setting the working mode to a timing potential mode, and starting up the electrochemical workstation; (5) taking out and washing the working electrode after the electrochemical workstation stops working; and (6) drying to obtain the sodion-embedded manganese dioxide nanometer sheet electrode. The sodion-embedded manganese dioxide nanometer film electrode as well as the preparation method and the application of the electrode disclosed by the invention have the characteristics of simple technique, mild reaction condition and excellent electrochemical performance of materials.

The invention relates to a sodium vanadyl phosphate symmetrical sodium-ion battery material of which the morpholog is granular, tubular and lamellar, the sodium vanadyl phosphate nano particle size is 60-90nm, the sodium vanadyl phosphate nanotube is 20-30nm in diameter and is wound together in a curled manner, the sodium vanadyl phosphate nanosheet is 150-200nm in thickness and 5-6mum in length and width. The sodium vanadyl phosphate symmetrical sodium-ion battery material can be applied as the active material of the sodium-ion battery. The sodium vanadyl phosphate symmetrical sodium-ion battery material has excellent multiplying power, high specific capacity and good circulating stability when being used as the active material of the sodium-ion battery, and the whole battery has good circulating and multiplying power performances when the sodium vanadyl phosphate nano particles are used as the cathode and the anode of the battery; the process is simple, economical and practical.

The invention discloses a method for preparing (Z)-5-amino-alpha-(ethoxy imino group)-1, 2, 4-thiadiazole-3-acetic acid. The method comprises steps of firstly, carrying out oximation reaction on malononitrile and sodium nitrite under the action of acetic acid so as to obtain a compound A, then carrying out Williamson synthesis on the compound A and bromoethane or diethyl sulfate under alkaline condition, so as to obtain a compound B, then carrying out amidine reaction on the compound B and ammonia water, so as to obtain a compound C, carrying out cyclization reaction on the compound C and potassium rhodanide for ring closing so as to obtain a compound D, and finally, hydrolyzing the compound D under the action of a strong base, so as to obtain (Z)-5-amino-alpha-(ethoxy imino group)-1, 2, 4-thiadiazole-3-acetic acid. The method has few synthesis steps, has low cost, uses the materials which are cheap and easy to obtain, is beneficial to industrial production, and has light contamination; the purity of the product can reach 99%, so that synthesis of high-purity ceftaroline fosamil in the subsequent step is guaranteed.

The preparation process of photocatalytic titania fiber material includes the following steps: synthesizing polyacetyl ethyl acetate-titanium complex as the precursor; dissolving the synthesized polyacetyl ethyl acetate-titanium complex in tetrahydrofuran to compounding spinning liquid of viscosity 5-100 Pa.s, with the ratio between the synthesized polyacetyl ethyl acetate-titanium complex and tetrahydrofuran being 100 g to 400-800 ml; centrifugally spinning the spinning liquid of viscosity 5-100 Pa.s into short precursor fiber; dry spinning the spinning liquid of viscosity 50-100 Pa.s into continuous long precursor fiber; and final water steam activation of the precursor fiber and heat treatment and sintering. The preparation process has simple operation, easy control and low power consumption.

The invention belongs to the technical field of the chemical industry, which relates to a load type nano gold catalyst for preparing lactone by catalyzing air oxidation alpha, omega-diol. The invention adopts nano iron oxide as a carrier of a gold catalyst, the iron oxide is synthesized by a hydrothermal method, and nano iron oxide carriers with different crystal types and patterns can be preparedby calcination. The gold catalyst is prepared by a precipitation settling method, the prepared catalyst has small gold particles and good dispersivity, the interaction of gold and the carrier is strong, the gold catalyst represents an excellent activity in the preparation of gamma-butyrolactone by the direct oxidation of 1,4-butanediol through catalyzing air and the preparation of delta-valerolactone by oxidizing 1,5-pentanediol and conforms to the requirement of green chemistry, and the generation of lactone by oxidizing alpha, omega-diol in one step is realized. A magnetic iron oxide carrier can be obtained by selecting a proper preparation method, and the invention is convenient to separate and recover the catalyst and has better industrial application prospect.

The invention discloses a graphite alkenyl supermolecule hybridization material with strengthened heat stability and a preparation method thereof. The graphite alkenyl supermolecule hybridization material with strengthened heat stability is in a nanometer structure constructed on the basis of supermolecule self-package technique. The preparation process includes three steps of graphite oxide preparation, reduced graphene oxide preparation and graphite alkenyl supermolecule hybridization material preparation. Relative to unmodified reduced graphene oxide, the hybridization material combined inthe method can be easily dispersed in organic solvent with low polarity and the heat stability is greatly improved. Simultaneously, the hybridization material can serve as a nanometer material to improve the heat stability of a polymer composite material. The combining steps are simple and high in efficiency, so that the hybridization material can be prepared in a large amount and has better application prospect and economical benefit.

The invention relates to a preparation method of a Prussian blue flower-like nano-structure electrode material. The preparation method comprises the following steps: 1) firstly, dissolving nickel chloride hexahydrate and anhydrous sodium citrate into de-ionized water; 2) dissolving sodium ferrocyanide decahydrate into de-ionized water; 3) pouring a solution of step 2) into a mixed solution obtained by step 1) and uniformly stirring to obtain a mixed solution; 4) standing the mixed solution obtained by step 3); 5) centrifuging and collecting sediment; washing the sediment for several times; drying in vacuum to obtain Prussian blue precursor powder; 6) adding the precursor powder into a sodium hydroxide solution and carrying out ultrasonic treatment; 7) centrifuging and collecting a product and washing; drying in vacuum to obtain light green powder, namely the Prussian blue flower-like nano-structure electrode material. The preparation method provided by the invention has the beneficial effects that the specific surface area is remarkably enlarged so that reaction sites of electrolyte and the electrode material are effectively increased and an ion diffusion distance is reduced; when the Prussian blue flower-like nano-structure electrode material is used as a positive electrode active material of a sodium ion battery, the material has the characteristics of high power and good cycling stability.

The invention discloses a preparation method for substituted indole and isoquinoline, and belongs to the technical field of organic chemical synthesis. By adopting oxygen as an oxidizing agent and various substituent substituted alkyne and arylamine or hydrazone as an initial raw material, the method obtains compounds containing indole and isoquinoline structures by virtue of transition metal catalysis. The reaction raw materials, the oxidizing agent and the catalyst are low in price and are easily available, and the synthetic process is simple, so that the synthetic cost is greatly lowered; the reaction condition is mild, the yield is high, and industrialization is facilitated; The reaction raw materials and the catalyst are clean and non-toxic, so that the environmental pollution is less. The compounds and derivatives as important fine chemicals are widely applied to the fields of medicines, pesticides, spices, photoelectricity and the like.

The invention provides a direct methanol fuel cell anode catalyst Pt/ MnO2-RuO2/ CNTs and a preparation method thereof. The preparation method comprises the following steps of: adding carbon nano tube and ruthenium trichloride into water, performing ultrasonic dispersion, slowly adding potassium permanganate solution into the solution at room temperature with intense stirring, performing heating reflux on the solution, and performing filtration, washing and drying after the reaction to obtain MnO2-RuO2/ CNTs; and dispersing the prepared MnO2-RuO2/ CNTs into ethylene glycol, adding chloroplatinic acid solution into the solution, adjusting the pH value of the solution, performing heating reflux to react the solution, and filtering, washing and drying the reaction product to obtain the Pt/ MnO2-RuO2/ CNTs catalyst. The method has the advantages of simple process, mild operation conditions, low cost and easy expanded production; and the catalyst prepared by the method has high electro-catalysis and oxidation activity of methanol and excellent CO poisoning resistance.

The invention relates to a graphene-modified vanadium disulfide micrometer flower material and a preparation method thereof. The graphene-modified vanadium disulfide micrometer flower material can be used as an aluminum ion battery cathode active material, and has a micrometer flower laminated structure which is self assembled by vanadium disulfide nanometer sheets, wherein graphene is uniformly distributed in the micrometer flower laminated structure, an interlayer distance of the micrometer flower laminated structure is shown in the description, and the diameter of a micrometer flower is 1-1.5 microns. The graphene-modified vanadium disulfide micrometer flower material and the preparation method thereof have the beneficial effects that the novel laminated graphene-modified vanadium disulfide electrode material is prepared through a one-step hydrothermal method, expresses high specific capacity, good cycle performance and good coulombic efficiency by larger interlayer distance of the vanadium disulfide and uniform interlayer modification on graphene when being used as the aluminum ion battery cathode active material, and is a potential application material of an aluminum ion battery; and secondly, the preparation method has the advantages of simple process, short synthesis time and mild conditions, meets the requirement on green chemistry, and is beneficial to market popularization.

The invention belongs to the technical fields of nano materials and electrochemistry, and particularly relates to a metal organic framework material CuBDC nano sheet and a preparation method thereof (herein BDC is 1,4-dicarboxylic benzene). The material can be used as a sodium ion battery anode material and is formed by stacking a plurality layers of the CuBDC nano sheets, wherein thickness of single nano sheet is 15-25 nm and the side width of the nano sheet is 3-7 [mu]m. The nano sheet has a porous structure of which the BET specific surface area is 530-550 m<2>/g and the pore size is less than 2 nm, wherein the porous structure belongs to microporous structure. The metal organic framework material CuBDC nano sheet has uniform morphology and has excellent electric-conductive performance; when being used as the sodium ion battery anode material, the material has excellent rate, high specific capacity and excellent circulation stability. The material has simple process, is economical, satisfies requirement of green chemistry and is easy to commercially promote.

The invention relates to a laminated Na3V2(PO4)3@rGo nanocomposite and an preparation method and an application therefor. The nanocomposite can be used as a sodium ion battery positive electrode active material with high rate capability and long service life; and the nanocomposite is formed by a sheet structure and rGO nano-sheets in a layer-to-layer overlapping manner, wherein the sheet structure is formed by nanoscale sub-unit Na3V2(PO4)3 particles. When the laminated Na3V2(PO4)3@rGo nanocomposite is used as the sodium ion battery positive electrode active material, the material is excellent in cycling stability and high in rate capability, so that the laminated Na3V2(PO4)3@rGo nanocomposite is the potential application material for the sodium ion batteries with high rate capability and long service life; and in addition, the preparation method is simple in process, capable of meeting the green chemistry demand, low in equipment requirement and good for the marketization promotion.

The invention discloses a preparation method of a silver-loaded nano cellulose-chitosan composite film, the preparation method of the silver-loaded nano cellulose-chitosan composite film comprises the following steps: adding sodium periodate into a nano cellulose solution, stirring in a dark place, centrifuging for separation, and washing to obtain dialdehydo nano cellulose; adding a newly-prepared saturated silver ammonia solution for preparation of silver-loaded nano cellulose; mixing the silver-loaded nano cellulose with a chitosan solution to obtain a silver-loaded nano cellulose-chitosan antibacterial film. Nano silver particles prepared in the method are evenly distributed in dialdehydo nano cellulose network structures, the easy agglomeration problem of the nano silver particles can be well solved, the preparation process does not require the use of special instruments, also does not need a chemical reducing agent, and the production cost is reduced. Through use of good mechanical properties of the nano cellulose, the low mechanical strength problem of the chitosan film is improved, and the antibacterial property of the chitosan film is improved by silver loading operation. The silver-loaded nano cellulose-chitosan composite film has broad application prospects in antibacterial wound dressings and food packaging and other industries.

The invention relates to a potassium ion embedded type vanadium pentoxide nanowire and a preparation method thereof. The preparation method includes 1), weighing V205 to add into deionized water, adding a KOH (potassium hydroxide) water solution and stirring to obtain a water solution; 2), transferring the water solution into a reaction still, heating the water solution, and obtaining deep green products after the water solution is taken out; 3), performing centrifugal separation, washing the deep green products by a mixed solution mixing with absolute ethyl alcohol and deionized water, and then placing the deep green products in a dryer to dry; 4), putting the deep green products in a muffle furnace to have a heat treatment to obtain yellow green samples; and 5), washing the yellow green samples in step 4 with the mixed solution mixing with the absolute ethyl alcohol and the deionized water, putting the yellow green samples in the dryer to dry to obtain the potassium ion embedded type vanadium pentoxide nanowire. The potassium ion embedded type vanadium pentoxide nanowire has the advantages that the nanowire has high specific capacity, good cycling stability and excellent rate capability, and is a potential high-performance commercial lithium ion battery anode material.

The invention discloses an MXene/silver nanowire/nanocellulose composite film and a preparation method thereof. The method mainly comprises the following steps: (1) etching MAX to prepare a single-layer MXene colloidal solution; (2) preparing a silver nanowire colloidal solution; (3) preparing a carboxylated nanocellulose colloidal solution by a TEMPO oxidation method; (4) mixing the three colloidal solutions according to a certain mass ratio, conducting stirring and carrying out ice-bath ultrasonic treatment to obtain a uniform mixed solution; and (5) carrying out vacuum suction filtration on the mixed solution, and carrying out hot-pressing drying to obtain the MXene/silver nanowire/nanocellulose composite film. According to the preparation method of the MXene/silver nanowire/nanocellulose composite film, the prepared composite film has good flexibility, electrochemical performance, electromagnetic shielding performance and antibacterial performance, and has wide application prospects in the fields of aerospace, weaponry, flexible wearable equipment and the like.

The invention provides a PEI (polyethyleneimine) modified cellulose membrane adsorbent and a preparation method thereof. The preparation method comprises the steps of (1) preparing a cellulose solution; (2) defoaming, knifing, gelatinizing and washing the cellulose solution to prepare a cellulose hydrogel membrane; (3) oxidizing an object obtained in the step (2) into a hydrogen peroxide solutionto obtain an oxidized cellulose hydrogel membrane; (4) soaking an object obtained in the step (3) into a PEI water solution for reacting, and washing with water after finishing reaction to obtain a PEI modified cellulose hydrogel membrane; (5) drying an object obtained in the step (4), and preparing the PEI modified cellulose membrane adsorbent. The preparation method is simple, and no cross-linking agent needs to be used during a preparation process, so that not only is the cost favorably reduced, but also adverse effects brought by additive residues are avoided; meanwhile, the preparation process is environmentally friendly without pollution, and the prepared adsorbent has an excellent adsorption effect on heavy metal ions and is easy to separate and recover after use.