141results about How to "Unique physical and chemical properties" patented technology

A quaternary ammonium salt ionic liquid of the present invention and its preparation and application methods belong to quaternary ammonium compounds, and its molecular composition is N, N, N-trimethyl-N-sulfobutyl-ammonium bisulfate, and its molecular formula is [HSO3-b -N(CH3)3]HSO4, the structural formula is as follows: the quaternary ammonium salt ionic liquid of the present invention is non-corrosive equipment and environment-friendly, and the quaternary ammonium salt ionic liquid catalyst of the present invention is used for nitrobenzene catalytic hydrogenation to synthesize p-amino The phenol reaction is a liquid phase method, the reaction temperature is 60-130° C., and the PAP yield reaches 19.5-88%.

The invention belongs to the technical field of material preparation and separation, and relates to preparation of lithium/rubidium ion adsorbing materials, in particular to a preparation method and application of a modified hollow mesoporous silicon sphere adsorbent. Hollow mesoporous silicon spheres (HSs) are synthesized, a manganese-based lithium ion sieve (HMO) is supported on the surface of the hollow mesoporous silicon spheres (HS), and finally, 3-aminopropyltriethoxysilane (APTES) is modified to form the modified hollow mesoporous silicon sphere adsorbent. Synthetic process steps are simple, the prepared micro-nano hollow mesoporous silicon spheres have the advantages of large specific surface area, modifiable surface hydroxyl, good mono-dispersity, good particle size and duct size adjustability and the like, the surface of the micro-nano hollow mesoporous silicon spheres with a high specific surface is modified, and the adsorbing capacity of the materials is greatly improved. The manganese-based lithium ion sieve and the APTES are compounded with the micro-nano hollow mesoporous silicon spheres to obtain the modified hollow mesoporous silicon sphere adsorbent with unique physical and chemical properties, and lithium/rubidium ions can be efficiently adsorbed and separated in a high-selectivity manner.

The invention discloses a crease resistance and moisture retention liposome. The crease resistance and moisture retention liposome comprises, by mass, 1-3% of phosphatide, 0.5-1.5% of cholesterol, 0.05-0.15% of an antioxidant, 0.5-1.5% of Tween-80, 2-6% of a cryoprotectant, 84-94% of a phosphate buffering solution with the pH value of 6.5-7, 0.4-1.5% of an aqueous solution of superoxide dismutase, 0.4-1.5% of an aqueous solution of hyaluronic acid and 0.4-1.5% of an aqueous solution of ceramide, and the sum of the mass percentages of above components is 100%. The invention discloses a preparation method of the crease resistance and moisture retention liposome. The method comprises the following steps: preparing a blank liposome, wrapping active components by the blank liposome, and carrying out freeze-thawing and freeze-drying to prepare the crease resistance and moisture retention liposome. The crease resistance and moisture retention liposome can be added to cosmetics in order to prepare cosmetics with crease resistance and moisture retention efficacies.

A process for preparing the nano-class composite oxide from perovskite, spinel, scheelite, heteropoly acid, etc by mechanical grinding features that the collision, squeezing and kneading between high-energy metallic balls can trigger the solid-state chemical reaction between simple oxides at lower temp to generate nano-class composite oxide. It includes such steps as proportional mixing, high-energy ball grinding while solid-phase reaction, fine grinding, washing and drying.

The invention discloses a hexagonal boron nitride modified graphitized carbon nitride composite optical catalyst as well as a preparation method and application thereof. According to the composite optical catalyst, by taking graphitized carbon nitride as a carrier, laminated hexagonal boron nitride modifies the graphitized carbon nitride carrier. The preparation method comprises the following steps: mixing the hexagonal boron nitride with a graphitized carbon nitride precursor; and calcining the mixed precursor to obtain the hexagonal boron nitride modified graphitized carbon nitride composite optical catalyst. The hexagonal boron nitride modified graphitized carbon nitride composite optical catalyst disclosed by the invention has the advantages of being environmentally friendly, fully free of metal doping, large in specific surface area, high in photoproduction electron-hole separating efficiency, high in optical catalytic activity, good in stability, corrosion-resistant and the like. The preparation method has the advantages of being simple, low in cost of raw materials, less in energy consumption, easy to control conditions and the like. The composite optical catalyst disclosed by the invention is used for degrading dye wastewater and has the advantages of being simple in application method, stable in optical catalytic performance, high in corrosion resistance, high in dye wastewater degrading efficiency.

The invention discloses an iron-based porous material for degrading an azo dye. The iron-based porous material comprises an iron element which has an atom percentage within 73.5-86%. The preparation method comprises the following steps: selecting raw materials according to proportions of a target alloy, smelting in high-vacuum 5*10<-3>Pa, and repeatedly smelting for 3 to 4 times to uniformly mix the alloy; carrying out a single copper roller throwing quick-cooling method on the smelted main alloy so as to obtain an iron-based amorphous alloy strip; carrying out isothermal annealing thermal treatment on the iron-based amorphous alloy strip so as to obtain an iron-based nano crystal strip; selecting an appropriate corrosive solution to carry out dealloying treatment on the iron-based nano crystal strip, so as to obtain an iron-based porous strip. By adopting the method, the structure and the size of iron-based porous iron can be controlled by changing components of an iron-based amorphous alloy, thermal treatment temperatures and dealloying times, the operation process is simple, convenient and controllable, meanwhile, the prepared iron-based porous material has the advantages of being high in specific surface area, high in porosity, high in activity, and the like, and the treatment efficiency is remarkably improved when the azo dye is degraded with the iron-based porous material.

The invention relates to a method for recovering a mesoporous molecular sieve organic template. The method comprises the following steps of: filling mesoporous molecular sieve with 30-45 wt% of organic template into an extractor; flowing supercritical carbon dioxide and entrainer into the extractor simultaneously, with extraction pressure of 10-30 MPa, supercritical carbon dioxide flow of 40-60 L /h and extraction time of 2-6 h, at 40-70 DEG C, wherein the entrainer is hexane, acetone, ethyl ester or a mixture of ethanol and ethyl ester in a volume ratio of 1:1, and a molar ratio of entrainer to carbon dioxide is 0.03-0.15; separating the organic template, entrainer and carbon dioxide in the extract at normal temperature and normal pressure; and evaporating to remove the entrainer and recovering the organic template. A recovery rate of the template reaches more than 80%.

The invention discloses a fullerene ethylenediamine nitrate as well as a preparation method and an application thereof. Firstly, fullerene C60 and ethylenediamine are taken as raw materials, fullerene ethylenediamine is prepared by the aid of a nucleophilic addition principle, and the fullerene ethylenediamine reacts with nitric acid so that the fullerene ethylenediamine nitrate is obtained. The fullerene ethylenediamine nitrate has the advantages of oxidant ammonium nitrate (AN), can avoid disadvantages of hygroscopicity, and crystal transformation of AN, and can be used as an oxidant to be applied in a novel solid rocket propellant or explosive.

The invention discloses a production method of Chinese wolfberry fruit tablet candy. The production method is characterized in that the Chinese wolfberry fruit power is used as the principal raw material and pilose asiabell root extract, red sage root extract, hawthorn fruit extract, chrysanthemum flower extract and xylitol are used as the accessory ingredients; the principal raw material and the accessory ingredients are then mixed, ultrafine-crushed, made into soft material, pelletized, compressed into tablets, checked and packaged so as to prepare the Chinese wolfberry fruit tablet candy. The Chinese wolfberry fruit tablet candy organically combines the precious resource formulation with modern processing technology, so that the nourishing and healthcare values of the Chinese wolfberry fruits and the eating-by-dissolving characteristic and advantages of the candy are given a full play. According to the production method, the Chinese wolfberry fruits are made into Chinese wolfberry fruit tablet candy which is rich in nutrients, abundant in biologically active substances, easy for human body to absorb, convenient to eat and carry and good in taste; the Chinese wolfberry fruit tablet candy has certain healthcare functions; moreover, the Chinese wolfberry fruit tablet candy is capable of providing a new route for diversified development of the Chinese wolfberry fruit resource; thus, the Chinese wolfberry fruit tablet candy has wide market prospect.

The invention relates to a copper ion detection reagent and application, and belongs to the technical field of chemical detection. The detection reagent is a polyethyleneimine modified water-soluble nano particle solution; the preparation method comprises the following steps: dissolving gold salt or silver salt in deionized water, adding polyethyleneimine of a certain proportion, and uniformly mixing to prepare the solution containing water-soluble nano particles with the surfaces being modified by amino groups; the detection method comprises the following steps: taking a proper amount of nano particles, adding the proper amount of nano particles into a phosphate buffer solution (PBS) of a certain pH value, adding a copper ion sample, then observing the color change of the solution and testing ultraviolet-visible absorption spectrum, and processing data. According to the copper ion detection reagent and application, provided by the invention, the preparation process of the reagent is simple, the reaction time is only 1 hour, and complicated treatment is not needed, therefore the reagent can be directly used; besides, as both the ultraviolet-visible spectrum analysis technique and the visual method are adopted, the color change of the solution is observed, the response to Cu<2+> is quick, the selectivity is high, high simplicity and convenience are achieved, and the copper ion detection reagent is applicable to rapid field detection of Cu<2+> in environmental water.

A process for preparing the electrically conductive titanate powder by gas-phase RE diffusion method includes such steps as thermally dissolving RE oxide in concentrated nitric acid, cooling using amide reagent to regulate its concentration to obtain RE contained panetrant, preheating carburizing furnace, dropping amide reagent into it, quickly loading titanate powder in the furnace dripping said penetrant in the furnace, and diffusing at 860-950deg.C for 3-6 hr.

The invention discloses a preparation method of fibroins of different forms. The method comprises the following steps of: removing a sericin part from a bave substance, and drying to obtain a degummed bave substance dried product; dissolving the degummed bave substance dried product, removing impurities to obtain a fibroin solution, and drying to obtain a fibroin dried product; dissolving the fibroin dried product into an organic solvent, and preparing a fibroin organic solution; and preparing fibroins of different forms including fibroin nanoparticles and fibroin fibers with a supercritical fluid forced dispersion solution. The preparation method disclosed by the invention is safe and simple, and has low cost; and obtained fibroin nanoparticles or fiber products have unique physical and chemical properties, and can be applied in the fields of spinning, biological medicine and the like.

The invention relates to a preparation method of a manganese and ceramic loaded modified montmorillonite-based SCR (Selective Catalytic Reduction) denitration catalyst and belongs to the field of preparation of catalytic materials. The invention provides the preparation method of the manganese and ceramic loaded modified montmorillonite-based catalyst, aiming at the disadvantages in the prior artthat the price of a carrier is relatively high, the reaction activity is relatively low, a temperature window is relatively narrow and the like. The preparation method comprises the following steps: modifying montmorillonite by utilizing a titanium tetrachloride solution; then loading active metal on the carrier by utilizing an ion exchange method and uniformly distributing the active metal on thecarrier; then calcining to prepare the SCR denitration catalyst. The catalyst provided by the invention has the advantages of relatively high denitration efficiency and relatively wide reaction temperature window and has an application prospect of being used as an industrial denitration catalyst.

The invention discloses a metal organic framework modified stannous sulfide composite photocatalyst as well as a preparation method and application thereof. The composite photocatalyst takes a metal organic framework MIL-53(Fe) as a carrier and is loaded with stannous sulfide. The preparation method of the composite photocatalyst comprises the following steps: mixing MIL-53(Fe) with stannous sulfide, adding solution containing S<2->, and carrying out precipitation reaction, so that the metal organic framework modified stannous sulfide composite photocatalyst is obtained. The composite photocatalyst disclosed by the invention has the advantages of environment friendliness, large specific surface area, many reaction sites, high photogenerated electron-hole utilization rate, high photocatalytic activity, good stability and corrosion resistance, and the preparation method has the advantages of simplicity in operation, low raw material cost, low energy consumption, short consumed time and easy-to-control conditions. The composite photocatalyst disclosed by the invention can be used for degrading hexavalent chromium wastewater, has the advantages of high degradation efficiency, simple application method, low cost and no secondary pollution and has a good practical application prospect.

The present invention discloses an American ginseng tableting candy production method, which is characterized in that American ginseng powder is adopted as a main raw material, Chinese wolfberry powder, tuckahoe polysaccharides, an ophiopogon japonicus extract, corn starch and xylitol are matched, and mixing, ultrafine crushing, soft material preparation, granulation, tableting, testing and packaging are performed to prepare the American ginseng tableting candy. According to the present invention, the valuable resource compounding and the modern biotechnology are organically combined, the nutritional health value of the American ginseng and the characteristics and the advantages of the buccal eating of the candy are completely provided, and the American ginseng is prepared into the American ginseng tabletting candy with characteristics of rich nutrients, rich biological activity, easy absorption, easy easting, easy carrying and good taste, such that the American ginseng tabletting candy has a certain health effect, can provide a new approach for the multiple development of the American ginseng resources, and has wide market prospects.

The invention discloses a spirofluorene pyridine palladium nanoparticles and a preparation method thereof. The method is as below: adding a certain amount of metal salt solution into the organic ligand containing pyridine units, stirring for 1-3 h at a certain temperature, aging for 3-5 h, conducting centrifugal separation, washing and drying to obtain corresponding metal-ligand nanoparticles. The preparation process is simple, low in cost and suitable for mass production; and by using different solvents, controlling the amount of reactants, reaction time and temperature, the method achieves effective regulation on particle size and dispersion of spirofluorene pyridine palladium nanoparticles. The prepared spirofluorene pyridine palladium nanoparticles are functionalized nanoparticles containing palladium, have stable performance, can be used for the catalysis of C-C bond coupling reaction, and have high catalytic efficiency and yield reaching 90-99%. Therefore, the spirofluorene pyridine palladium nanoparticles have broad application prospects in the field of catalysis.

The invention discloses a zinc oxidenanorod-carbon nanotubealcohol sensor and a preparation method thereof, and belongs to the technical field of gas detection. Thealcohol sensor comprises a ceramic tube, a sensitive layer on the ceramic tube, a testing electrode and a heating electrode, wherein the sensitive layeris made of a zinc oxidenanorod-carbon nanotubecompositematerial. The preparation method of the sensor comprises the following steps: firstly, preparing the zinc oxidenanorod-carbon nanotubecompositematerial; secondly, preparing an indirectly heatedsinteredgas-sensitive element. The lower detection limit of the gas-sensitive sensor to alcohol reaches 2ppm, and meanwhile the sensor has short response time, relatively high repetition stability and relatively high sensitivity.

A multi-layer hollow microcapsule in submicron class is prepared through treating by coupling agent, microemulsion polymerizing, electochemical oxidizing polymerizing, and acid etching. Its advantages are high thermal and chemical stability, unique structure and variable properties.

The invention relates to a detection method for nitrofuran antibiotics. The detection method is characterized by measuring the concentrations of to-be-detected nitrofuran antibiotics in to-be-detectedsamples by adoption of a fluorescence quenching method by taking a POSS fluorescent porous polymer as a fluorescence material. According to the detection method, the fluorescence quenching method isadopted to rapidly detect the nitrofuran antibiotics in the to-be-detected samples, so that the detection method has the advantages of being high in sensitivity, good in selectivity, less in sample size and simple in method, and has practical application value for the detection of the nitrofuran antibiotics.

The invention discloses a modification and vulcanization cadmium composite photocatalyst for a metal organic framework, as well as a preparation method and application of the modification and vulcanization cadmium composite photocatalyst. The photocatalyst takes a three-dimensional porous titanium-based metal organic framework MIL-125 (Ti) as a carrier, and is formed by loading cadmium sulfide onto the MIL-125 (Ti) carrier. The photocatalyst has the advantages that the photocatalyst is environmentally friendly, large in specific surface area, more in reactive sites, high in photo-induced electron-hole utilization, high in photocatalytic activity, good in stability and resistant to corrosion, is formed by depositing cadmium sulfide nanometer particles onto the MIL-125 (Ti) according to a deposition method, and has the advantages of simple technology, low material cost, small energy dissipation and low time consumption; the photocatalyst has the advantages of high selectivity and simpleapplication method in the application of preparing benzaldehyde through benzyl alcohol selective oxidation.

The invention discloses an application of a nano-structure hollow calcium carbonate microsphere in microbe microencapsulated culture. The invention also discloses a microbe microcapsule which contains the nano-structure hollow calcium carbonate microsphere accounting for 1%-8% of the total weight of microbes. The invention also discloses a preparation method of the microbe microcapsule. The invention provides a new application of the nano-structure hollow calcium carbonate microsphere. According to the microbe microcapsule disclosed by the invention, the nano-structure hollow calcium carbonate microsphere is added in the preparation process of the microbe microcapsule, because a large quantity of pore passage structures exist in the nano-structure hollow calcium carbonate microsphere, the microbes can smoothly enter the nano-structure hollow calcium carbonate microsphere through the pore passages to be coated so as to obtain good protection, and the survival rate of the microbes is far higher than that of a freeze drying process and a spray drying process and basically higher than that of a microencapsulated freeze drying process by carrying out viable counting on the microbe microcapsule. The preparation method disclosed by the invention has the advantages of simple process, small equipment investment, short period and suitability for large-scale production.

The invention discloses pegylation benzoindoles heptamethine cyanine dye and a preparation method and application thereof. A molecular structure of the pegylation benzoindoles heptamethine cyanine dyecontains polyethylene glycol, a benzoindoles ring and a heptamethine chain; a general formula structure of the pegylation benzoindoles heptamethine cyanine dye is a heptamethine chain which containsheptamethine conjugated chain without substituent or is connected with a chlorocyclopentene bridge ring, and chlorine atoms on the chlorocyclopentene bridge ring can be replaced by active groups of sulfydryl, amino and the like to be applied to further dye decoration. The pegylation benzoindoles heptamethine cyanine dye disclosed by the invention has the beneficial effects that a polyethylene glycol chain boned to the benzoindoles ring ensures that the dye has good water solubility and biological compatibility; an aromatic ring, a heterocyclic ring and a methenyl chain can form a large conjugated structure to provide a condition for fluorescent color development of the functional dye; as the functional dye has better water solubility and optical stability, the functional dye can be used aswater-soluble near-infrared fluorescent dye.