184 results about "Phosphomolybdic acid" patented technology

According to the method, phosphomolybdic acid, copper chloride and ferric chloride serve as precursors, copper and iron-containing phosphomolybdic acid nano-enzyme (Cu, Fe-PMs) with peroxidase-like activity is synthesized through a microwave method, under the acidic condition, on one hand, the surface of Cu and Fe-PMs carries negative charges, high affinity is generated between Cu and Fe-PMs and a substrate TMB with positive charges, and on the other hand, the surface of Cu and Fe-PMs has negative charges; on the other hand, Cu / Fe / Mo three-metal redox couple accelerates the regeneration of Fe < 2 + > and plays an important role in the activity of peroxidase, and meanwhile, due to the introduction of sodium dehydroacetate, Cu and Fe in Cu and Fe-PMs and pyranoid ring and keto O in sodium dehydroacetate interact through coordinate bonds to cause electron interaction, so that the peroxidase-like activity of Cu and Fe-PMs is enhanced, and the peroxidase-like activity of Cu and Fe-PMs is improved. And the Fenton reaction is enhanced through transfer of electrons among the sodium dehydroacetate, the Cu and the Fe-PMs. When Cu and Fe-PMs oxidize TMB and H2O2, sodium dehydroacetate enhances the absorbance of the system, and on the basis, a novel colorimetric rapid detection method of sodium dehydroacetate is established.

The invention relates to the technical field of catalysts, in particular to a molybdenum-based oxide / carbide / GO heterojunction catalyst, a preparation method thereof and application of the molybdenum-based oxide / carbide / GO heterojunction catalyst in the field of fuel oxidation desulfurization. The preparation method comprises the following steps: S1, adding dimethylimidazole and metal salt into a graphene oxide aqueous solution, and stirring for reaction; s2, adding an aniline monomer and an initiator, dropwise adding phosphomolybdic acid as a molybdenum source, and centrifuging, washing and freeze-drying a product after the reaction is finished to obtain a polyaniline modified ZIFs / GO composite precursor adsorbed with the molybdenum source; and S3, performing high-temperature pyrolysis on the composite precursor in a protective atmosphere to obtain the catalyst. The invention provides a mode of constructing a molybdenum-based oxide / carbide heterostructure by enhancing the electron-donating capability and conductivity of a carrier through double-doped electron-donating elements, and develops a catalyst with high catalytic activity and low cost. The catalytic efficiency in the oxidative desulfurization process can be effectively improved.

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 discloses vacancy heteropolyacid, a preparation method thereof and application of the vacancy heteropolyacid in electrolytic coupling hydrogen production, and belongs to the technical field of catalysts. The preparation method comprises the following steps: by taking phosphomolybdic acid as a raw material, preparing vacancy heteropolyacid by adjusting the pH value to 2-6 or adding high-concentration acid for acidification and heating; the high-concentration acid is 0.1-6 M phosphoric acid or a mixed acid of 0.1-3 M phosphoric acid and 0.1-6 M sulfuric acid or 0.1-1 M perchloric acid. The rate of oxidizing biomass and organic wastewater by the vacancy phosphomolybdic heteropolyacid prepared by the method is 10-20 times of that of complete Keggin type phosphomolybdic acid. The invention further provides an organic wastewater degradation and electrolytic hydrogen production coupling process, vacancy heteropoly acid can be regenerated and recycled, and coupling hydrogen production can be achieved.

The invention relates to a co-doped carbon nitride / phosphomolybdic acid composite catalyst as well as a preparation method and application thereof. The composite catalyst is composed of co-doped carbon nitride and phosphomolybdic acid loaded on the co-doped carbon nitride; the co-doped carbon nitride is graphite phase carbon nitride co-doped with sodium, phosphorus and oxygen, and the co-doped carbon nitride is prepared by mixing a cyanamide compound and sodium hexametaphosphate and calcining at high temperature. The composite catalyst is used for photocatalytic production of hydrogen peroxide, and a method for photocatalytic production of hydrogen peroxide comprises the following steps: dispersing the co-doped carbon nitride / phosphomolybdic acid composite catalyst in an aqueous solution containing a sacrificial agent, and performing photocatalytic preparation of hydrogen peroxide under irradiation of a xenon lamp. Compared with the prior art, the preparation method provided by the invention is simple and good in repeatability, the charge separation efficiency of the prepared photocatalytic material is remarkably improved, and the photocatalytic hydrogen peroxide preparation efficiency is high.

The invention relates to the technical field of composite electrocatalysts, in particular to a preparation method of a ruthenium-molybdenum-manganese composite electrocatalyst for purifying chlorine-containing organic waste gas, which comprises the following steps: S1, dissolving ruthenium salt and manganese salt in deionized water according to a certain proportion, and stirring for a period of time to obtain a mixed solution; s2, introducing a certain amount of ozone gas into the mixed solution prepared in S1; s3, weighing a certain amount of phosphomolybdic acid, adding the phosphomolybdic acid into the mixed solution in S2, and continuously stirring for a period of time to obtain a stable solid precipitate; and S4, putting the solid precipitate prepared in S3 into a muffle furnace, and roasting at a certain temperature to obtain the ruthenium-molybdenum-manganese composite electrocatalyst. By optimizing the loading proportion of ruthenium, molybdenum and manganese and the preparation method, the stability and catalytic activity of the catalyst are effectively improved. The catalyst has excellent chlorine poisoning resistance, can efficiently decompose chlorine-containing VOCs at a low temperature, realizes rapid dissociation of chlorine atoms and organic groups, and inhibits generation of by-products.

The invention belongs to the technical field of nano confinement, and provides a method for preparing multi-grain-boundary molybdenum carbide nano-particles through a precise double-confinement path and application of the multi-grain-boundary molybdenum carbide nano-particles. The preparation method comprises the following steps of: coating polymer hydrogel on a carbon carrier in situ by taking a Ni-porphyrin cross-linking agent as a nickel source and phosphomolybdic acid as a molybdenum source, and preparing a Ni and PMo12 ortho-position double-confinement carbon-coated precursor by accurately controlling the ratio of the phosphomolybdic acid to the cross-linking agent and cross-linking through a self-confinement Ni-containing cross-linking agent Ni porphyrin cross-linking agent; the proportion of a Mo source to a cross-linking agent is precisely limited, and the multi-grain-boundary molybdenum carbide catalyst regulated and controlled by Ni atoms is prepared based on double-confinement pyrolysis. The molybdenum carbide catalyst containing a plurality of crystal boundaries is accurately prepared on the carbon substrate, and the OER catalytic performance of the molybdenum carbide catalyst is researched. Accurate regulation and control on the defect state of the molybdenum carbide nanosheet are realized, so that the intrinsic catalytic activity of molybdenum carbide is improved. The prepared catalyst shows excellent electrochemical performance in electro-catalysis oxygen evolution, and efficient water electrolysis oxygen evolution is achieved.

The invention belongs to the technical field of environmental functional materials, and discloses a sludge-based catalytic material as well as a preparation method and application thereof. The preparation method of the sludge-based catalytic material comprises the following steps: drying sludge to obtain sludge particles; mixing the sludge particles, EDTA (Ethylene Diamine Tetraacetic Acid), citric acid and water, and reacting to obtain modified sludge particles; mixing the modified sludge with a phosphomolybdic acid solution, and performing pyrolysis to obtain the sludge-based catalytic material. According to the invention, the EDTA and the citric acid are adopted to modify the sludge, metals in the sludge are distributed on the surface of the material in the subsequent pyrolysis process, and the citric acid also has a pore-forming effect to increase the specific surface area of the material and improve the adsorption capacity to pollutants; the sludge is modified by adopting phosphomolybdic acid, and abundant oxygen-containing functional groups are introduced to the surface of sludge carbon, so that the adsorption capacity and the catalytic degradation capacity of the sludge-based catalytic material are improved, and the sludge-based catalytic material has good catalytic performance.

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 a pyrophosphomolybdate adsorbent material for extracting rubidium and cesium from salt lake brine and its preparation method and application, and the preparation includes the following steps: S1, preparation of silicon aluminum phosphate aluminum complex: adding silicon source, aluminum source, phosphorus source, composite structure directing agent and deionized water to a reaction device, regulating the pH of the solution to 4-8, stirring, crystallization reaction, filtering and washing after the reaction is completed to obtain a silicon aluminum phosphate aluminum complex; S2, immobilization of molybdenum source: mixing the silicon aluminum phosphate aluminum complex obtained in step S1 with the molybdenum source uniformly, and then roasting, ammonium conversion and granulation treatment are carried out in sequence to obtain a pyrophosphomolybdate adsorbent material. The pyrophosphomolybdate adsorbent material prepared by the present invention is suitable for extracting rubidium and cesium from salt lake brine, and has the advantages of low dissolution loss, large adsorption capacity, high adsorption rate, convenient elution, and reusability.

The invention provides a nitrogen-doped carbon nanosphere-molybdenum carbide-carbon nanotube composite material and a preparation method and application thereof in hydrogen evolution by electrolysis of water, the preparation method comprises the following steps: combining phosphomolybdic acid with dopamine through interaction, grinding with melamine to fully mix, and finally calcining in one step to obtain the nitrogen-doped carbon nanosphere-molybdenum carbide-carbon nanotube composite material. The nitrogen-doped carbon nanosphere-molybdenum carbide-carbon nanotube composite material is prepared by the following steps of: carbonizing polydopamine and melamine and doping nitrogen and molybdenum, catalyzing molybdenum to generate a carbon nanotube, and finally obtaining the nitrogen-doped carbon nanosphere-molybdenum carbide-carbon nanotube composite material, and applying the nitrogen-doped carbon nanosphere-molybdenum carbide-carbon nanotube composite material to the catalytic research of hydrogen evolution reaction by electrolysis of water. Compared with the traditional preparation method, the method disclosed by the invention is simple, rapid, mild in reaction condition and high in yield, and the prepared composite material is uniform in morphology and has excellent electro-catalytic performance on a water electrolysis hydrogen evolution reaction.

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.

The invention discloses a quality detection method for Blumea Balsamifera medicinal material, comprising the use of thin layer chromatography to identify Blumea Balsamifera medicinal material, mainly comprising: taking a test solution and a reference solution of Blumea Balsamifera medicinal material, spotting them on the same silica gel thin layer plate, using petroleum ether-ethyl acetate-chloroform with a volume ratio of 11:1:3 as a developing agent, spraying with a phosphomolybdic acid test solution with a mass content of 5%, and heating until the spots are clearly colored. The invention has the characteristics of accurately identifying the authenticity of Blumea Balsamifera medicinal 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 preparation method of a low-dimensional composite material for electrochemical sensing detection of nitrite, and relates to the technical field of low-dimensional materials. The preparation method comprises the following steps: by taking selenium powder as a reducing agent, reducing phosphomolybdic acid under specific hydrothermal reaction conditions, and after the reaction is finished, cooling, centrifuging and drying to obtain the MoO3-coated MoSe2 nano composite electrode material. The one-dimensional / two-dimensional structure MoO3atMoSe2 nano composite electrode material prepared by the invention has the advantages of strong specific recognition capability on nitrite, long service life, high sensitivity and excellent detection limit.

The invention discloses a catalyst for preparing cyclohexylbenzene through alkylation of benzene and cyclohexene as well as a preparation method and application of the catalyst. The catalyst comprises an ultrathin layered MWW molecular sieve and heteropoly acid, and the layered thickness of the ultrathin layered MWW molecular sieve is 5-10 nm; the heteropoly acid is one or more of phosphotungstic acid, silicotungstic acid and phosphomolybdic acid. By adopting the catalyst, the selectivity can be improved, the service life of the catalyst can be prolonged, and the alkylation reaction of benzene and cyclohexene can be carried out at a lower reaction temperature, so that the selectivity of a key byproduct impurity methyl cyclopentylbenzene 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 relates to a visible-light-induced transparent colored finish-coat paint and a preparation method thereof. The visible-light-induced transparent colored finish-coat paint is mainly prepared from the following components in parts by mass: # imgabs0, wherein a phosphomolybdate / hydroxyethyl cellulose hybrid solution is an ethylene glycol solution of phosphomolybdate hybrid modified hydroxyethyl cellulose. The defects that existing finishing varnish is colorless and transparent in a wet film state and a dry film state, and floating is easily caused by non-uniform construction during spray roller coating or batch scraping are overcome, a phosphomolybdate / hydroxyethyl cellulose hybrid solution is adopted as a color-changing substance, a reducing agent, a graphene modified silicone acrylic emulsion and a rheological additive are matched, and the color-changing finishing varnish is prepared. And by matching with other preferable component types and dosage proportions in the system, the coating has the advantages of roller coating or spray coating construction, facilitation of uniform coating, good durability and environmental protection.

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.

The present invention belongs to the technical field of oxidative desulfurization, and specifically relates to a water-containing porous phosphomolybdic acid-based polyionic liquid and a preparation method and application thereof. 12 O 40 A novel aqueous porous phosphomolybdic acid-based polyionic liquid PDIM-PMo-W was prepared using HPMo and poly[3-dodecyl-1-vinylimidazolium] bromide (PDIMBr) as raw materials and applied to oxidative desulfurization. The turnover frequency (TOF) value of PDIM-PMo-W for the removal of dibenzothiophene (DBT) can reach 41.15 h at 50 °C. ‒1 , which are 35.47 and 9.92 times of HPMo and PDIM‑PMo, respectively. This invention systematically studies the effect of water on the catalytic activity of polyoxometalate-based polyionic liquids for the first time, and finds that the water absorption behavior of the catalyst is reversible, and the dry catalyst can still show excellent catalytic activity after being immersed in water.

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 invention relates to the technical field of amorphous preparation technologies, in particular to a preparation method of an amorphous MoO2-x (at) C composite material, which comprises the following steps: S1, dissolving phosphomolybdic acid in ethanol; dissolving 2-methylimidazole in another part of ethanol, standing the mixed solution, and collecting an obtained Mo-MI precursor through centrifugal operation; s2, dispersing the Mo-MI precursor nanospheres into deionized water, and stirring the Mo-MI precursor nanospheres and the deionized water; dropwise adding a pyrrole (Py) solution, and continuously stirring under an ice-water bath condition; then, through centrifugal treatment, a Mo-MI coated PPy (Mo-MI coated with polypyrrole) precursor is obtained; and S3, placing the dried Mo-MI-coated PPy precursor in a nitrogen environment, and carrying out pyrolysis treatment at 450 DEG C for 2 hours to obtain the amorphous MoO2-x-coated C composite material. The MoO2 prepared by the method disclosed by the invention has the characteristics of an amorphous structure and a core-shell structure, the electronic conductivity of the MoO2 is remarkably enhanced due to the characteristic of the amorphous state, and the migration mode of Li < + > is optimized, so that the rate performance of the material is greatly improved.