114 results about "Phosphomolybdic acid" patented technology

The invention discloses cobalt molybdenum nitride / cobalt modified nitrogen-doped hollow carbon microspheres as well as preparation and application thereof, and relates to the technical field of electrochemical energy storage devices. Carboxylated polystyrene microspheres, soluble zinc salt and cobalt salt, phosphomolybdic acid and 2-methylimidazole are dispersed in methanol, a PMA (at) ZnCo-ZIFs / PS precursor of a spherical structure is obtained, then the PMA (at) ZnCo-ZIFs / PS precursor is placed in an inert atmosphere for carbonization treatment, and the cobalt molybdenum nitride / cobalt modified nitrogen-doped hollow carbon microsphere material is obtained. According to the structure and the preparation method, the nitride / metal cobalt component and the nitrogen-doped sodium affinity sites are introduced at the same time, uniform transportation and nucleation of sodium ions are effectively induced, sodium metal is guided to deposit in a specific three-dimensional structure, growth of sodium dendrites is effectively inhibited, volume expansion of metal sodium in the reaction process is relieved, the preparation method is simple and convenient, and the preparation method is suitable for industrial production. The cost is low, the electrochemical performance of the sodium metal battery assembled by using the composite material can be remarkably improved, and the composite material has a good large-scale application prospect.

The invention belongs to the technical field of functional fiber materials, and particularly relates to a high-photothermal-conversion biological inorganic composite photothermal fiber preparation method and a high-photothermal-conversion biological inorganic composite photothermal fiber. The high-photothermal-conversion biological inorganic composite photothermal fiber preparation method comprises the steps that inorganic nanowires which are formed by assembling bismuth oxide and phosphomolybdic acid and have the photothermal conversion characteristic are prepared; preparing a DNA-quaternary ammonium salt complex, and compounding the DNA-quaternary ammonium salt complex with inorganic nanowires to obtain a compound; the DNA-quaternary ammonium salt complex / inorganic nanowire compound is subjected to wet spinning, and the biological inorganic composite photo-thermal fiber is obtained.The biological inorganic composite photo-thermal fiber is simple in preparation process, free of special equipment, low in cost, environmentally friendly and beneficial to development and popularization of the next generation of biological inorganic composite photo-thermal fiber, and the obtained photo-thermal fiber has the full-spectrum absorption characteristic and has a wide application prospect. According to the present invention, the solar energy can be efficiently utilized, the photo-thermal conversion ability is strong, the rapid heating can be achieved under the sunlight irradiation, the reproducibility and the degradability are provided, and the sustainable and environmental-friendly development of the economic and social resources is easily achieved.

The invention discloses nanoparticles for synergistically treating tumors and a preparation method of the nanoparticles, and relates to the technical field of preparation of drugs containing inorganic active ingredients. The nanoparticles are composite nanoparticles Mo-PDA prepared by mixing and reacting inorganic active ingredients of phosphomolybdic acid Mo-POM and dopamine; the preparation method comprises the following steps: taking Mo-POM (phosphomolybdic acid), then loading Mo-PDA-coated GOx nanoparticles with a spherical structure formed by glucose oxidase (GOx), and carrying out mixing reaction by taking Mo-POM, adding deionized water, then adding dopamine, continuously stirring for 1 hour, and continuously reacting for 14-18 hours at the temperature of 150-170 DEG C. According to the preparation method disclosed by the invention, PDA is combined with Mo-containing polyacid salt and externally loaded with glucose oxidase (GOx), so that the PTT-modified CDT-hunger nanoparticle Mo-PDA-GOx for cooperatively treating tumors is synthesized, and the PTT-modified CDT-hunger nanoparticle Mo-PDA-GOx has excellent photo-thermal conversion efficiency which reaches 67.2%. The nanoparticles effectively exert synergistic treatment, and the treatment effect on tumors is improved.

The invention belongs to the technical field of battery materials, and particularly relates to a method for determining iron phosphide in a phosphate positive electrode material, the positive electrode material and application. Comprising the following steps: preparing standard solutions of a series of phosphate positive electrode materials with different iron phosphide contents; respectively collecting and purifying magnetic substances in the standard solutions, and adding a quimocilidone reagent to determine the corresponding quinoline phosphomolybdate precipitate; drawing a standard curve according to the mass of the iron phosphide and the mass of the quinoline phosphomolybdate precipitate in the standard solutions with different iron phosphide contents; preparing a to-be-detected solution, collecting and purifying magnetic substances in the to-be-detected solution, adding a quinmolybdenum citronone reagent to determine the mass of the quinoline phosphomolybdate precipitate, and calculating the content of iron phosphide in the to-be-detected phosphate positive electrode material. By means of the method, the content of trace iron phosphide in the phosphate positive electrode material can be efficiently, accurately and quantitatively analyzed, the content of iron phosphide in the phosphate positive electrode material can be quantitatively regulated and reduced, and the electrochemical performance of the phosphate positive electrode material is improved.

The invention discloses a preparation method of a metal organic framework catalyst and application of the metal organic framework catalyst in biomass furfural hydrogenation, and belongs to the technical field of catalytic hydrogenation. The preparation method of the metal organic framework catalyst comprises the following steps: S1, dissolving cobaltous acetate, L-glutamic acid and phosphomolybdic acid in distilled water to obtain a solution marked as a solution A; dissolving 1, 3, 5-benzenetricarboxylic acid (BTC) in ethanol to obtain a solution B, pouring the solution B into the solution A, stirring, and centrifuging to collect a precipitate; and S2, calcining the precipitate in an inert atmosphere to obtain the metal organic framework catalyst. The specific steps of applying the catalyst to the furfural hydrogenation reaction are as follows: adding the prepared catalyst and furfural into deionized water, performing heating and pressurizing reaction through a hydrogenation reaction kettle to obtain a solution, extracting the solution with ethyl acetate, and performing GC quantitative detection on the product after the extraction reaction. The method is mild in reaction condition, has an efficient furfural hydrogenation effect, and can completely convert FFA within 2 hours under the condition that 50 mg of catalyst is added.

A method for synergistically improving the photoelectric efficiency and stability of PSCs based on phosphomolybdic acid@gamma-cyclodextrin host-guest composite material belongs to the technical field of perovskite solar cells. The present application solves the problems of poor photoelectric efficiency and stability of existing PSCs, and solves the problems of poor compatibility of existing POMs with perovskite system and easy aggregation of POMs in the process of perovskite defect passivation, which leads to low utilization rate of passivation sites. Preparation: I, PMo 12 @gamma-CD host-guest composite material; II, preparation of PMo 12 @gamma-CD modified perovskite precursor solution; III, preparation of PSCs. The present application is used for synergistically improving the photoelectric efficiency and stability of PSCs based on phosphomolybdic acid@gamma-cyclodextrin host-guest composite material.

This invention relates to the field of electroplating solution analysis technology, and in particular to a rapid analytical method for polyethylene glycol (PEG) additives in copper electrodeposition solutions. The method involves protonated PEG forming a macromolecular complex colloid with phosphomolybdate under acidic conditions of pH 1.0–2.0. This colloid exhibits maximum absorption at 372 nm, and the absorbance value is directly proportional to the PEG concentration in the formed complex colloid. This allows for quantitative analysis of PEG in the copper electrodeposition solution. Because the phosphomolybdate-PEG complex colloid selected in this invention has excellent selectivity, and no sample pretreatment is required, this invention offers advantages such as ease of operation, speed, high sensitivity, and good selectivity. It is particularly suitable for intermediate control analysis in production environments, such as for electroplated copper interconnects in chips and printed circuit boards, as well as electrolytic copper foil for negative electrode current collectors and copper-clad laminates in energy storage batteries.

The invention discloses a regeneration method of a catalyst for preparing maleic anhydride through benzene oxidation and a method for preparing maleic anhydride through benzene oxidation. The regeneration method comprises the following steps: heating the inactivated benzene oxidation maleic anhydride catalyst, spraying a phosphomolybdic acid solution to the surface of the catalyst, and then drying and regenerating. According to the method, the catalyst can be reused, environmental pollution is reduced, and the use cost of the catalyst is reduced.

The invention discloses a kind of artificial metabolic enzyme targeting mitochondria and its preparation method and application, relate to the field of biomedical material technology, the method comprises the following steps:Activated carbon is mixed and stirred with phosphomolybdic acid solution to obtain POM / AC;Mixed with acetylacetonate platinum (II) solution, reduction treatment is carried out to obtain Pt-POM / AC;It is dispersed in ethanol, 3-aminopropyltriethoxysilane is added and stirred, and solid A is obtained by freeze drying;(3-carboxypropyl) triphenylphosphine bromide, dimethyl sulfoxide and 1-ethyl-(3-dimethylaminopropyl) carbodiimide hydrochloride are mixed, stirred in dark, N-hydroxysuccinimide is added, activated in dark, and solution B is obtained;Solid A is dissolved, mixed with solution B, stirred in dark, centrifuged, washed and dried, and the artificial metabolic enzyme targeting mitochondria is obtained.The artificial metabolic enzyme can be effectively taken up by tumor cells, and combined radiotherapy anti-tumor effect is better, and there is greater application value.

The invention belongs to the technical field of sodium-ion batteries, and relates to a sodium-ion battery negative electrode material, in particular to a molybdenum sulfide / carbon composite material with a gradient structure and a preparation method and application thereof. The preparation method comprises the following steps: uniformly stirring resorcinol, formaldehyde and tetrapropoxysilane under an alkaline condition to obtain phenolic resin / silicon nanospheres; calcining again to obtain crystalline carbon / silicon dioxide nanospheres; then selectively etching to remove the silicon dioxide component to obtain a three-dimensional carbon sphere carrier with a gradient pore structure; mixing the three-dimensional carbon sphere carrier with a sulfur source and phosphomolybdic acid in a solution, and obtaining a MoS2 (at) C precursor by adopting a vacuum impregnation growth method; and carrying out secondary calcination on the MoS2 (at) C precursor under an inert atmosphere condition to obtain the MoS2 (at) C / MoS composite material. The molybdenum sulfide / carbon composite material prepared by the invention has a unique structure, so that the molybdenum sulfide / carbon composite material has good electrochemical stability, excellent rate capability, high specific capacity, large specific surface area and more reaction sites when being used as a negative electrode material of a sodium-ion battery.

The invention belongs to the technical field of water electrolysis hydrogen production catalysts, and relates to a metal monatomic hydrogen evolution catalyst and a preparation method thereof.The catalyst comprises a large number of metal monatomic and a small number of metal clusters, metal is in an oxidation state in the catalyst, and crystalline PMA exists in the catalyst; c60 and PMA structures coexist in the catalyst; the preparation method comprises the following steps: respectively dissolving an acetylacetone metal complex, phosphomolybdic acid and fullerene in a toluene solution of a 4A type molecular sieve, respectively and sequentially mixing, magnetically stirring, washing and centrifuging to obtain the metal monatomic hydrogen evolution catalyst; the metal monatomic hydrogen evolution catalyst disclosed by the invention has excellent HER performance, a PMA-M-C60 catalyst with high loading capacity and high dispersion of metal monatomic bridging C60 and PMA is realized through a room-temperature synthesis strategy, and the catalysis cost is lower.

The invention discloses a phosphorus and molybdenum co-doped trinickel disulfide three-dimensional material as well as a preparation method and application thereof, and relates to a doped trinickel disulfide three-dimensional material as well as a preparation method and application thereof. The technical problem that an existing trinickel disulfide catalyst is low in catalytic activity is solved. According to the material, foamed nickel serves as a conductive substrate, phosphorus and molybdenum co-doped trinickel disulfide of a nanorod structure vertically grows on the surface of the foamed nickel, and wrinkled nanosheets are stacked on the surfaces of nanorods. The preparation method comprises the following steps: firstly immersing the foamed nickel in a mixed solution of powdered sulfur, diethylenetriamine and ethanol for hydrothermal reaction, then immersing the foamed nickel in a water and ethanol mixed solution of thioacetamide and phosphomolybdic acid for secondary hydrothermal reaction to obtain the nickel foam, the nickel foam can drive 10 mA cm <-2 > / 100 mA cm <-2 > in a 1.0 M KOH + 0.33 M urea solution only by 1.315 V / 1.345 V, and the nickel foam can be used in the field of conventional alkaline or urea oxidation assisted energy-saving hydrogen production.

The invention discloses a preparation method and application of a rare earth metal europium-based complex for detecting silicotungstic acid, and the preparation method comprises the following steps: adding phosphomolybdic acid and europium trichloride into distilled water, and uniformly stirring to obtain a phosphomolybdic acid-europium trichloride mixed solution; and pouring the phosphomolybdic acid-europium trichloride mixed solution into a hydrothermal reaction kettle, heating to 150 DEG C, reacting for 72 hours at a constant temperature, cooling to room temperature, taking out a reactant, washing with deionized water, separating to obtain a crystal, and naturally airing to obtain the rare earth metal europium-based complex. The rare earth metal europium-based complex is applied to detection of silicotungstic acid. The method has the advantages that the high-sensitivity synthetic reagent for detecting silicotungstic acid is prepared by adopting a hydrothermal synthesis technology. Operation is easy, and feasibility is high; the product rare earth metal europium-based complex has good water solubility, can be directly used for detecting sewage, does not need special treatment on a sample, greatly shortens the detection time, can rapidly and sensitively detect silicotungstic acid, and has a low detection limit.

Disclosed is a self-powered formaldehyde sensing device, comprising: a triboelectric material electrode layer including a first substrate and a first electrode layer formed on the first substrate; a triboelectric material dielectric layer including a second substrate, a second electrode layer formed on the second substrate, a dielectric reacting layer formed on the second electrode layer, and a reaction modification layer formed on the dielectric reacting layer to surface-modify the dielectric reacting layer, the reaction modification layer being a phosphomolybdic acid complex (cPMA) layer, the phosphomolybdic acid complex of the phosphomolybdic acid complex layer being obtained by dissolving 4,4′-bipyridine (BPY) in isopropanol (IPA) and then mixing with phosphomolybdic acid (PMA) solution; an elastic spacer; and an external circuit.

The invention discloses a method for rapidly detecting acrylamide in food by using a fluorescent probe, which comprises the following steps of: synthesizing copper and iron-containing phosphomolybdic acid nano-enzyme (Cu, Fe-PMos) with peroxidase-like nano-enzyme activity by using phosphomolybdic acid, copper chloride and ferric chloride as precursors through a microwave method, catalyzing xanthol to react with HCl to generate a fluorescent derivative by using the Cu and Fe-PMos, and detecting the acrylamide in the food by using the fluorescent probe. When acrylamide is added into a fluorescent system, reaction of xanthene alcohol and acrylamide is carried out to generate a xanthene acrylamide fluorescent substance, reaction of Cu, Fe-PMos and xanthene alcohol is inhibited, and the fluorescence intensity of the system is reduced, so that a fluorescent probe rapid detection method of acrylamide is established. Other coexisting substances do not interfere with each other, the detection limit reaches 0.01 mu g / mL, and the method has the characteristics of high sensitivity, strong specificity, simplicity and rapidness in operation and the like.

The present application belongs to the technical field of electrolytic copper foil manufacturing, and particularly relates to a HVLP copper foil with low surface roughness and a preparation method thereof. The preparation method comprises the following steps: electrolytic foil growth, vacuum annealing treatment, electrochemical grain boundary pinning treatment, surface treatment and drying and slitting. The vacuum annealing treatment is performed after the electrolytic foil growth and before the surface treatment, so as to eliminate the residual stress in the copper foil; the electrochemical grain boundary pinning treatment adopts a silicon tungstate or phosphomolybdate electrolyte, and introduces tungsten or molybdenum elements at the grain boundary of the copper foil to form a pinning layer; in the surface treatment, the roughening treatment adopts pulse current and adds grain nano-refining additives, the solidification treatment is performed in a solidification liquid containing a rare earth salt, and the silane coupling agent treatment adopts a complex treatment liquid of KH-560 and a long-chain alkyl silane coupling agent. The obtained HVLP copper foil has a roughness Rz of the rough surface of less than or equal to 0.8 microns, high initial peel strength, a peel strength retention rate of more than 80% after hygrothermal aging, and good long-term service stability.

The invention discloses a preparation method of a copper-based phosphomolybdic acid nanocluster electrode material for nitrate reduction. The preparation method comprises the following steps: (1) dissolving Na2MoO4 2H2O in purified water, and adding concentrated hydrochloric acid and concentrated phosphoric acid; refluxing the mixed solution in an oil bath, adding an NH4CI precipitant, carrying out reduced pressure filtration and air drying to obtain a yellow powdery crude product, dissolving the crude product in purified water at 70 DEG C, slowly evaporating the solution at room temperature, and carrying out reduced pressure filtration to obtain a (NH4) 6P2Mo18O82. 14.2 H2O crystal product; and (2) dissolving the (NH4) 6P2Mo18O62. 14.2 H2O crystal product in deionized water, stirring, transferring into a polytetrafluoroethylene reaction kettle, immersing the treated foamy copper into a solvent, cooling to room temperature, taking out, washing with deionized water and absolute ethyl alcohol, and drying in a vacuum drying oven to obtain the copper-based phosphomolybdic acid nanocluster electrode material. According to the method, in-situ growth of the copper-based phosphomolybdic acid nanocluster on the foamy copper is realized.

The invention provides a thin layer chromatography identification method for pumpkin stalk medicinal materials and preparations thereof. The method comprises the following steps: taking a sample to be tested, decocting with water, filtering, concentrating, extracting with a first solvent, evaporating to dryness, adding water and hydrochloric acid to the residue for extraction by heating, evaporating to dryness, and dissolving the residue in a second solvent to obtain a test solution; the sample to be tested is the pumpkin stalk medicinal material and the preparation thereof; taking a pumpkin stalk reference medicinal material, decocting with water, filtering, concentrating, extracting with a first solvent, evaporating to dryness, adding water and hydrochloric acid to the residue for extraction by heating, evaporating to dryness, and dissolving the residue in a second solvent to obtain a control medicinal material solution; performing thin layer chromatography on the test solution and the control medicinal material solution, using a silica gel G thin layer plate and n-hexane-ether-glacial acetic acid as a developing solvent; spraying with a phosphomolybdic acid ethanol solution, heating until spots are clear, and inspecting under ultraviolet light, so that fluorescent spots of the same color appear at corresponding positions in the chromatogram of the test sample and the chromatogram of the control medicinal material. The present invention uses the observation of whether the fluorescent spots of the same color appear at the corresponding positions of the thin-layer chromatogram and the chromatogram of the control medicinal material as identification points to quickly and effectively identify the pumpkin pedicle medicinal material and its preparation, thereby ensuring the accuracy of clinical medication.

The application discloses a preparation method of a rice hull silica supported phosphomolybdic acid catalyst, which comprises the following steps: (1) dispersing phosphomolybdic acid in an organic solvent; (2) immersing a rice hull silica carrier in the dispersion liquid obtained in the step (1); (3) removing the dispersion liquid which is not absorbed by the rice hull silica to obtain a muddy mixture; (4) heating and drying the product obtained in the step (3) to gradually volatilize the organic solvent, and uniformly dispersing the phosphomolybdic acid on the surface of the rice hull silica substrate; and (5) further heat treating the product obtained in the step (4) to obtain the rice hull silica supported phosphomolybdic acid catalyst. The application does not need to additionally modify the rice hull silica carrier, and the distribution of molybdenum in the obtained catalyst is more uniform.

The invention discloses a method for promoting sludge dewatering by utilizing low-temperature heating under an acidic condition in cooperation with POM (polyoxymethylene), which comprises the following steps: firstly, heating activated sludge to be treated to a set temperature, adding phosphomolybdic acid into the activated sludge under a stirring condition, then adding dilute sulphuric acid to adjust the pH value to 2.0-7.0, and reacting under the stirring condition, according to the method disclosed by the invention, phosphomolybdic acid and low-temperature heat are used for cooperatively treating the sludge, and through the synergistic effect of acidic catalysis and thermally induced structure relaxation, the oxidative cracking of an extracellular polymeric substance (EPS) and the dissolution of organic matters in sludge floc are synchronously realized; the technical bottlenecks that the reaction path is limited and the energy utilization efficiency is low in the traditional single chemical oxidation or thermal conditioning process are broken through.

The invention discloses a hydrophobic composite material catalyst capable of being used for preparing a C1 oxygen-containing product through low-temperature methane oxidation and a preparation method of the hydrophobic composite material catalyst. The catalyst is prepared by enabling phosphomolybdic acid and copper nitrate to react in an organic solvent through a solvothermal method and then loading precious metal palladium or platinum. The multi-acid-based composite material catalyst is applied to catalysis of methane oxidation for preparation of C1 oxygen-containing compounds. The catalyst can catalyze methane to directly oxidize at a low temperature and a low H2O2 concentration so as to prepare C1 products such as methanol and the like. The composite material catalyst provided by the invention is simple in preparation method and good in stability, the optimal catalyst reacts for 30 minutes at 80 DEG C under 1M H2O2, the yield of a liquid oxygen-containing compound is as high as 5.41 mmol.gcat <-1 >. H <-1 >, the total selectivity of a C1 oxygen-containing compound is 98.49%, and the yield of the C1 oxygen-containing compound is not obviously reduced after multiple times of recycling.

The application discloses a preparation method of polyglycerol and belongs to the technical field of fine chemical synthesis; in the preparation method of polyglycerol, polystyrene microspheres loaded with phosphomolybdic acid and gallium oxide are introduced as a solid acid catalyst, the phosphomolybdic acid, the gallium oxide and the polystyrene microspheres can interact with each other, so that the reaction efficiency of glycerol polymerization is remarkably improved, and further by controlling the reaction temperature and the reaction time, the polyglycerol with high purity and high yield can be synthesized; and the polyglycerol obtained has light color and high quality. Meanwhile, in the preparation method, the reaction temperature is relatively low, the energy consumption is small, the solid acid catalyst used can be separated by filtration and recycled, the green and environmental protection effect is achieved, and in addition, in the preparation method, no toxic, harmful or highly corrosive substances are used, so that the safety in the preparation process can be effectively ensured.

The invention discloses a molybdenum-based nitride catalyst prepared based on assistance of carbon sphere confinement polyacid and a method and application of the molybdenum-based nitride catalyst, and belongs to the technical field of water electrolysis hydrogen production catalytic materials. According to the method, glucose serves as a carbon source, carbon nanospheres are synthesized through a hydrothermal method, polyacid (such as phosphomolybdic acid) is introduced to serve as a molybdenum source, and a carbon sphere composite structure with the built-in molybdenum source is formed; then compounding with a transition metal salt solution, drying and grinding to obtain a homogeneous precursor; and finally, nitriding in an ammonia gas atmosphere to convert metal species in situ to obtain the molybdenum-based nitride nanosphere with the hierarchical structure. According to the method disclosed by the invention, accurate regulation and control on material composition, crystal phase and pore structure are realized by regulating and controlling a metal proportion and a nitriding process, and the obtained catalyst has a hierarchical porous structure, high conductivity and fully exposed active sites, shows high catalytic activity and stability in hydrogen evolution and oxygen evolution reactions by electrolysis of water, is suitable for the field of energy conversion, and has wide application prospects. And the method has a good large-scale application prospect.

The invention belongs to the technical field of radioactive waste treatment, and particularly relates to an ammonium phosphomolybdate template adsorbent for removing Cs-137 and a preparation method of the ammonium phosphomolybdate template adsorbent. The method mainly comprises the following two steps: firstly, synthesizing a cesium phosphomolybdate precursor by using a dry method or a wet method, creating a site similar to Cs < + > in shape and size in an adsorbent, and reducing the steric effect in the adsorption process, so that the adsorption selectivity is improved; and then reacting a high-concentration ammonium chloride solution with cesium phosphomolybdate to replace the Cs element with ammonium so as to prepare the ammonium phosphomolybdate template adsorbent taking Cs < + > as the template. The adsorbent can be applied to adsorption removal of Cs-137 nuclide in water. Compared with a non-templated adsorbent, the template adsorbent has significantly enhanced adsorption selectivity and increased adsorption capacity when more competitive ions coexist in a high-salt system.

The present application belongs to the field of fine chemical wastewater treatment, and particularly relates to a pretreatment method of wastewater generated in preparation of 1,2-pentanediol by n-pentene oxidation method. The activated carbon loaded peroxymolybdophosphoric acid quaternary ammonium salt catalyst is added into the wastewater to be treated, and ultraviolet light irradiation is carried out, and hydrogen peroxide is added to react, so as to degrade 1,2-pentanediol in the wastewater and remove COD, and then the pretreatment of the wastewater is realized. The activated carbon loaded peroxymolybdophosphoric acid quaternary ammonium salt catalyst can promote the hydrogen peroxide oxidation reaction, and can also degrade 1,2-pentanediol, and the amount of hydrogen peroxide can be reduced.

The invention relates to a flame-retardant smoke-suppressing PVC (polyvinyl chloride) composite material as well as a preparation method and application thereof, and belongs to the technical field of compositions of high-molecular compounds. The flame-retardant and smoke-suppressing PVC composite material comprises PVC resin, a plasticizer, a stabilizer, a lubricant and a flame-retardant and smoke-suppressing agent, the flame-retardant smoke suppressant is a mixture of at least one of aluminum hydroxide and magnesium hydroxide and a rare earth metal compound; wherein the rare earth metal compound comprises at least one of cerium phosphomolybdate (CePMo12O40) and lanthanum phosphomolybdate (LaPMo12O40). The PVC composite material has excellent flame retardance and smoke suppression performance.

The application discloses a red dye solution, a reagent combination and a method for Masson trichrome staining, and belongs to the field of histochemistry technology. The red dye solution comprises 0.4-1.0% of bibracine, 0.4-1.0% of temptation red and 1-2% of acetic acid, and water is used as a solvent, and the red dye solution further comprises 0.05-0.15% of orange G sodium salt; the reagent combination comprises the red dye solution and further comprises a blue dye solution, the blue dye solution comprises 2% of aniline blue, 1-2% of acetic acid, and water is used as a solvent, and the blue dye solution further comprises 0.005-0.03% of fast green, 0.0025-0.015% of brilliant green or 0.005-0.03% of bromocresol green sodium salt. The reagent combination further comprises hematoxylin dye solution, red differentiation agent and blue differentiation agent. The improved red dye solution for Masson trichrome staining provided by the application increases the affinity for muscle fiber dyeing, makes the muscle fiber dyeing more firm, and can still maintain bright red after phosphomolybdic acid differentiation. Meanwhile, the improved blue dye solution makes the collagen fiber dyeing more bright, and the color contrast between the muscle fiber and the collagen fiber is more obvious and easier to distinguish.

This invention discloses a polyacid-modified hydroxy boron nitride nanosheet, its preparation method, and its application. The preparation is carried out according to the following steps: (1) preparation of hydroxy boron nitride nanosheets, (2) synthesis of organic heteropolyacid salt compounds, (3) preparation of sodium tetrabutylphosphomolybdate, and (4) preparation of polyacid-modified hydroxy boron nitride nanosheet composite materials. This invention provides a simple, mild, and highly pure and dispersible method for preparing polyacid-modified hydroxy boron nitride nanosheets. It solves the technical problems of poor solution dispersibility, low product purity, and inability to prepare on a large scale in practical applications of h-BN.

The invention relates to preparation of an hourglass type phosphomolybdic acid two-dimensional complex and application of the hourglass type phosphomolybdic acid two-dimensional complex in electrocatalytic synthesis of ammonia. The obtained hourglass type phosphomolybdic acid two-dimensional complex is used for synthesizing ammonia through electro-catalysis nitrate radical reduction at normal temperature and normal pressure. The invention aims to solve the problems of poor stability and low catalytic performance of some multi-acid metal-organic complex crystalline materials used as electrode materials in the application of electrocatalytic nitrate reduction synthesis of ammonia. The chemical formula of the hourglass type phosphomolybdic acid two-dimensional complex disclosed by the invention is [Cu (p-tr2Ph) 2] 2 [Cu (p-tr2Ph)] 2 [Cu (H2O)] 2 [Cu3 (p-tr2Ph) Mo12 (HPO4) 3 (PO4) 5O40] (p-tr2Ph-Cu-P4Mo6 for short). The synthesis method comprises the following steps: adding copper chloride, molybdenum trioxide, phosphoric acid and an organic ligand p-tr2Ph into distilled water, uniformly stirring, adjusting the pH value, carrying out a hydrothermal reaction, and enabling the obtained complex material to have the maximum ammonia production rate of 16.73 mg h <-1 > mg cat <-1 > and the Faraday efficiency of 99.08% in a neutral electrolyte 0.1 M NaNO3 + 0.1 M Na2SO4 under the voltage of-1.0 V vs.RHE. The preparation process is low in energy consumption and low in cost, and a new solution is provided for designing an electrocatalyst for green and efficient synthesis of ammonia.

The invention relates to the technical field of anti-interference sensibilization total phosphorus determination, and discloses an anti-interference sensibilization total phosphorus determination method and a special chromogenic reagent thereof, in the special chromogenic reagent, ascorbic acid with a concentration of 10% ensures sufficient reducing ability, can efficiently reduce phosphomolybdenum heteropoly acid into phosphomolybdenum blue, enhances the sensitivity of a chromogenic reaction, and has good stability. According to the method, low-concentration total phosphorus can also be accurately detected, the detection capacity of the method on trace phosphorus is improved, molybdate and ammonium molybdate react with orthophosphate to generate phosphomolybdic heteropoly acid, and antimony potassium tartrate serves as a catalyst to accelerate the reaction rate, improve the color development efficiency, shorten the reaction time, guarantee the reaction sufficiency and improve the detection efficiency. The chelating agent can be complexed with various metal ions such as iron, copper, calcium and magnesium in a water sample, interference of the metal ions on chromogenic reaction is effectively eliminated, a reaction system is stabilized, the anti-interference capability of the determination method is remarkably improved, and the method is suitable for complex water samples.