714 results about "Citrate sodium" patented technology

The invention belongs to the technical field of SERS (Surface Enhanced Raman Scattering) detection, and particularly relates to an Ag-MoO2 composite SERS substrate as well as a preparation method and application thereof. The preparation method comprises the following steps: firstly, preparing Ag nanoparticles which are uniformly distributed and have the same size by a sodium citrate reduction method; secondly, a MoO2 material is prepared through a hydrothermal method; and finally, the novel SERS substrate Ag-MoO2 is prepared through a physical stirring method. According to the invention, the novel SERS substrate made of Ag nanoparticles and MoO2 materials is constructed, which is different from the conventional SERS substrate made of independent Ag nanoparticles, and can detect stronger intrinsic Raman signals of probe molecules. As the SERS substrate needs to be compounded with a MoO2 material during preparation, a charge transfer phenomenon can occur at an interface where the SERS substrate is in contact with probe molecules, so that intrinsic Raman signals of the probe molecules can be enhanced, and the SERS substrate can be better used for detecting and analyzing chemical substances.

The invention discloses an efficient combined regulator for easily-argillized copper oxide cobalt ore and a beneficiation method. The efficient combined regulator comprises the following components in parts by weight: 250-350 parts of sodium citrate and 1100-1200 parts of sodium hydrosulfide. Sodium citrate has high dispersing capacity, and the efficiency of selective adsorption between the argillization copper-cobalt ore and the medicament can be improved; meanwhile, the complexing ability of sodium citrate on ions, such as Fe, Ca and Mg, influencing agent adsorption on the surface of the ore is high, in addition, products obtained after complexing of the Fe, Ca and Mg ions can be dissolved in water, and action sites are provided for selective adsorption of a vulcanizing agent (NaHS) and a collecting agent amyl xanthate (PAX). According to the combined regulator and the beneficiation method provided by the invention, the problem of poor reagent selectivity in the flotation process of the argillization copper-cobalt ore can be obviously improved, the vulcanization effect of a vulcanizing agent is enhanced, and selective adsorption of a collecting agent is promoted, so that the recovery rate of copper and cobalt metals in the copper-cobalt oxide ore under the condition of serious ore argillization is improved.

The invention provides a preparation method of composite modified hydroxypropyl starch ether, and relates to the technical field of starch ether preparation. Corn starch and cassava starch are used as raw materials, the modified hydroxypropyl starch ether is prepared through premixing, alkalization and high-low temperature layering etherification, sodium citrate is added in the etherification process to serve as a stabilizer, the produced product has the advantages of being high in hydroxypropyl content, viscosity, solution transparency and whiteness, low in ash content and the like, the production cost is reduced, and the product is suitable for industrial production. The requirements of the market on high-quality, high-stability and low-cost starch ether are met.

The invention provides a secondary battery and an electronic device, the secondary battery comprises a positive pole piece and a negative pole piece, the positive pole piece comprises a positive pole material layer, the positive pole material layer comprises a positive pole active material, and the positive pole active material comprises a manganese-containing material; the manganese-containing material comprises at least one of lithium manganate, lithium iron manganese phosphate, a lithium-rich manganese-based material or nickel cobalt lithium manganate. The negative pole piece comprises a first additive, the first additive comprises at least one of carboxylate, sulfonate or a metal organic framework compound, carboxylate comprises at least one of lithium oxalate, sodium citrate, sodium maleate or sodium tartrate, sulfonate comprises at least one of sodium benzenesulfonate, sodium dodecyl benzene sulfonate or sodium methanesulfonate, and metal organic framework compound comprises at least one of lithium oxalate, sodium citrate, sodium maleate or sodium tartrate. The metal organic framework compound is prepared from at least one of Zn (C4H7N2) 2, C48H28O32Zr6 or C14H16N2O8Mg2. The invention further discloses a preparation method of the metal organic framework compound. The secondary battery meets the characteristics, and the cycle performance of the secondary battery can be improved.

The invention discloses a high-salt-resistance composite cleanup additive and a preparation method thereof, and relates to the technical field of oilfield chemical additives. The invention discloses a high-salt-resistance composite discharge aiding agent. The cleaning agent is prepared from the following raw materials in parts by weight: 10 to 20 parts of modified sodium dodecyl benzene sulfonate, 5 to 10 parts of cocamidopropyl betaine, 8 to 15 parts of polyoxyethylene ether, 2 to 5 parts of nano silicon dioxide, 3 to 8 parts of sodium hexametaphosphate, 1 to 3 parts of low-molecular-weight polyacrylamide, 4 to 10 parts of modified polyacrylic acid-acrylamide copolymer, 15 to 30 parts of ethanol and 5 to 12 parts of ethylene glycol butyl ether. 2-6 parts of an imidazoline derivative, 3-7 parts of amino trimethylene phosphonic acid, 4-9 parts of sodium silicate and 2-5 parts of citric acid-sodium citrate. Aiming at development requirements of high-salt oil reservoirs, sodium dodecyl benzene sulfonate and the polyacrylic acid-acrylamide copolymer are modified, and raw materials are scientifically compounded, so that the cleanup additive shows high stability in a high-salt environment, can reduce interfacial tension and effectively regulate and control rock surface wettability, has foam stability and biodegradability, and can be widely applied to high-salt oil reservoirs. The method is suitable for high-salt complex oil reservoir operation scenes.

The invention discloses a preparation method and application of octahedral cuprous oxide containing defects, and belongs to the technical field of material preparation. In order to solve the problems that in existing cuprous oxide preparation, a defect structure is difficult to accurately regulate and control, and the crystal form uniformity is insufficient, the method comprises the steps that a copper source solution, a glucose solution, a sodium citrate solution and an ammonium fluoride solution with specific concentrations are mixed according to the volume ratio, the pH is adjusted to 10.5-11, then a hydrothermal reaction is conducted, and a target product is obtained through centrifugation, filtration, washing and drying. The method comprises the following specific steps: mixing solutions, reacting in a high-pressure reaction kettle at 140-165 DEG C for 4-6 hours, and realizing octahedral crystal form construction and defect regulation and control by controlling the raw material ratio and reaction conditions. The preparation method is simple in process and high in controllability, and the prepared octahedral cuprous oxide containing defects can serve as a catalyst to be applied to the fields of catalytic decomposition of ammonium perchlorate and the like and has good industrial application prospects.

The invention discloses a hybrid Ag / MXene / Fe-Co MOF surface enhanced Raman scattering sensor and an application of the hybrid Ag / MXene / Fe-Co MOF surface enhanced Raman scattering sensor in rapid detection of bacteria. According to the sensor, silver nanoparticles are prepared through a sodium citrate reduction method, a two-dimensional material MXene and a bimetal organic framework are combined, and a surface enhanced Raman scattering spectrum detection platform with high sensitivity, stability and anti-interference performance is constructed. The conductive network of MXene and the local surface plasmon resonance effect of silver nanoparticles synergistically enhance an electromagnetic field, and the porous structure of Fe-Co MOF enriches target molecules and forms dense hot spots, so that the Raman signal intensity is remarkably improved. Experiments show that the detection limit of the sensor to 4-mercaptobenzoic acid is as low as 10 <-12 > M, and the signal stability can last for 7 days; the detection limit on common pathogenic bacteria such as escherichia coli and staphylococcus aureus reaches 10 CFU / mL, and the linear correlation coefficient is superior to 0.96. The sensor has hydrophobicity and biocompatibility, can efficiently capture bacteria through capillary force, is suitable for trace detection of complex samples, and provides a new strategy for rapid diagnosis of clinical drug-resistant bacteria.

The invention provides a haematococcus pluvialis culture medium and a culture method thereof. The culture medium comprises a nutrition proliferation culture medium, a stress induction culture medium and an accumulation strengthening culture medium which are used for segmented culture, the nutrition proliferation culture medium comprises sodium nitrate, monopotassium phosphate, potassium chloride, ferric ammonium citrate, sodium citrate and a trace element mixed solution; adding an osmotic stress agent, an oxidation inducer and plant hormones into a stress induction culture medium; and accumulating and strengthening the culture medium to remove sodium nitrate, and adding and supplementing a carbon source, a polymer penetrant and a zwitterionic stabilizer. The culture method comprises the following steps: a nutrition proliferation stage, a stress induction stage and an accumulation strengthening stage. According to the method, through a three-section culture medium and a fine regulation culture process, and through the synergistic effect of a composite stress factor and a dynamic environment signal, on the premise of ensuring relatively high activity of algae cells, bidirectional synergistic efficient improvement of biomass growth and astaxanthin accumulation is realized.

The invention relates to the technical field of medical dressings, in particular to a liquid adhesive bandage and a preparation method thereof.The preparation method comprises the following steps that according to the formula amount, sodium chloride and sodium citrate are added into water, and a mixture A is obtained; adding copper gluconate into the mixture A to form a mixture B; mixing Tween 20 with glycerin, adding L-menthol, and stirring to form a mixture C; adding the mixture C into the mixture B to form a mixture D; the preparation method comprises the following steps: adding acetic acid into water, uniformly mixing, adding chitosan, and dissolving to obtain a chitosan-acetic acid solution; adding a chitosan-acetic acid solution into the mixture D, and dissolving to form a mixture E; adjusting the pH value of the mixture E to 4.5-6.5, filtering, filling and sterilizing to obtain the liquid adhesive bandage. The prepared liquid adhesive bandage can quickly form a layer of protective film on the surface of a wound, effectively inhibits growth of bacteria and promotes wound healing, and meanwhile, the liquid adhesive bandage has good flexibility and comfort and small irritation.

The invention provides a new energy automobile battery flexible disassembling adhesive and a preparation method thereof, and belongs to the technical field of new energy automobile batteries, the flexible disassembling adhesive comprises the following components by weight: 45-50 parts of deionized water; 8 to 10 parts of gamma-butyrolactone; 5 to 8 parts of propylene glycol methyl ether acetate; 2 to 3 parts of microencapsulated lipase; 2 to 3 parts of nano cellulose immobilized protease; 6 to 8 parts of urea peroxide; 0.5 to 1 part of nano manganese dioxide; 0.7 to 1.1 parts of a sodium citrate / sodium lactate buffer solution; 1.5 to 2.5 parts of polyvinylpyrrolidone K30; 0.8 to 1.2 parts of hydroxypropyl methyl cellulose; 0.05 to 0.1 part of a graphene oxide nanosheet; 0.5 to 0.8 part of a benzotriazole derivative; 0.1 to 0.3 part of sodium molybdate; 6 to 8 parts of sorbitol; and 5-7 parts of ascorbic acid. The flexible disassembly adhesive solves the problems of low efficiency, serious environmental pollution, high safety risk and low material recovery rate in traditional battery disassembly.

The invention discloses a preparation method of a chemical composite plating solution based on nano niobium carbide. The preparation method comprises the following steps: step 1, pretreating niobium carbide (NbC) powder; step 2, preparing a chemical plating solution, wherein every 1L of the chemical plating solution contains 30g of nickel chloride, 20g of sodium hypophosphite, 10g of sodium citrate, 5g of glycine, 10g of sodium acetate, 0.3 g of sodium dodecyl benzene sulfonate and 80mg of zinc molybdate; fixing the volume to 1L by using distilled water; 3, measuring the niobium carbide suspension liquid, mixing the niobium carbide suspension liquid with the chemical plating solution, and fixing the volume, so that the content of niobium carbide in the chemical composite plating solution is 0.01-0.3 g / L; adjusting the pH value of the solution to 5.8; according to the method, niobium carbide nanoparticles are added into the chemical composite plating solution, so that the surface of a plated part and metal gold are combined with the particles, and the hardness and wear resistance of a base material are effectively improved; the effect on a 60-80-micron nickel-phosphorus coating in the industry is achieved through the ultrathin chemical composite coating (8-10 microns), so that the corrosion resistance and the wear resistance of the product are enhanced.

The invention provides a method for grafting Tibetan white bark pine on Chinese pine, belongs to the technical field of needle-leaved tree species grafting, and solves the technical problem that the survival rate is lower than 40% due to slow joint healing, high pathogen infection rate and environmental fluctuation. According to the technical scheme, the method is characterized by comprising the following steps: cutting 1.8-2.2 cm of a vertical notch reaching xylem at the part, which is 2.5-3.5 cm exposed out of the surface of a culture medium, of a rootstock rhizome part; cutting the scion base into a symmetrical double-sided wedge shape, and immersing the scion base into a sodium citrate buffer solution containing polyvinylpyrrolidone, methyl salicylate and calcium chloride; the two sides of the vertical notch are coated with adsorption glue; inserting a scion alignment cambium and fixing by using a grafting belt; an ethanol water solution containing salicylic acid, trehalose and polysorbate 80 is applied to the interface every 2-3 days; maintaining the day temperature to be 23-25 DEG C, the night temperature to be 16-18 DEG C and the humidity to be 90-95%; when the young sprouts grow to 2-3 cm, the rootstocks are girdled, and trunks are cut off after 7-10 days. The method is used for large-scale breeding of the Tibetan pinus bungeana grafted seedlings.

The invention discloses a preparation method of heat-insulating PVB (Polyvinyl Butyral) resin powder and a heat-insulating PVB film, and belongs to the technical field of PVB resin powder preparation. Comprising the following steps: S1, adding heat-insulating powder, sodium citrate and an auxiliary agent into a hydrochloric acid solution, fully stirring to obtain a heat-insulating powder suspension, ball-milling to obtain slurry, adjusting the pH value to be less than 1, and centrifuging to obtain a nano heat-insulating dispersion liquid; s2, fully reacting a PVA solution / n-butyraldehyde mixed solution with the nano heat-insulating dispersion liquid, washing, centrifuging and drying to obtain heat-insulating PVB resin powder; wherein the heat insulation powder is selected from rare earth element compounds. The PVB resin powder is used for preparing the heat-insulating PVB film. The infrared barrier rate of the PVB film in a low wave band and a high wave band can reach 98% or above, the full-wave-band infrared light barrier performance is remarkably improved, the light transmittance meets the standard of the heat-insulating PVB film, the haze is greatly reduced compared with a common heat-insulating film without a sodium citrate auxiliary, and the heat-insulating PVB film has excellent infrared shielding performance and optical performance.

The invention relates to the field of inorganic material preparation, and particularly discloses pseudo-boehmite and a preparation method thereof. A preparation method of pseudo-boehmite comprises the following steps: (1) mixing an aluminum salt solution and an aluminate solution, adding a crystal form regulating agent, and stirring for reaction to obtain a sol system; the crystal form regulating agent is ZnS quantum dots modified by thiohydracrylic acid; (2) adding a pore diameter guiding agent into the sol system, and aging for 6-8 hours; the pore diameter guiding agent is a compound of a polyethylene glycol-polypropylene glycol-polyethylene glycol triblock copolymer and sodium citrate; and (3) carrying out solid-liquid separation on the aged sol system, and washing and drying the obtained solid to obtain the pseudo-boehmite. The proportion of 5-10nm pores of the pseudo-boehmite prepared by the preparation method disclosed by the invention reaches 90% or above, so that the pore distribution requirement of a fine catalytic reaction on the pseudo-boehmite can be met, and the efficient catalytic reaction is favorably realized.

The invention discloses a bone cement composition and application thereof, and relates to the technical field of bone cement. The bone cement composition comprises a solid phase component and a liquid phase component, wherein the solid phase component comprises 60-75 parts of composite calcium phosphate, 10-20 parts of strontium glass powder, 8-12 parts of a reinforcing agent and 3-7 parts of a solidification reaction regulator; the liquid phase component comprises 20-30 parts of a phosphate buffer solution, 3-8 parts of a sodium citrate solution, 5-15 parts of an anti-inflammatory agent and 1-5 parts of a hyaluronic acid solution. The preparation method comprises the following steps: reacting 1, 10-phenanthrene-2, 9-dicarboxylic acid with 2-aminomethyl furan to obtain an intermediate 1, and reacting the intermediate 1 with poly (ethylene glycol) maleimide to prepare the reinforcing agent. The prepared bone cement composition has good mechanical properties, self-repairing performance and anti-inflammatory performance, and has a good application prospect in the field of bone repairing.

The present application relates to a sodium-ion battery precursor, a positive electrode material, a preparation method, and a use. A complexing agent solution used for preparing the sodium-ion battery precursor comprises a first complexing agent and a second complexing agent, wherein the first complexing agent comprises any one of or a combination of at least two of oxalic acid, sodium oxalate, or potassium oxalate, and the second complexing agent comprises any one of or a combination of at least two of citric acid, sodium citrate, or potassium citrate. In the present application, by providing the specific complexing agents, the prepared sodium-ion battery precursor has a relatively high specific surface area, thereby facilitating the intercalation of sodium ions when sintering and preparing a positive electrode material, so that the electrochemical performance of the sodium-ion battery positive electrode material can be significantly improved.

The invention discloses a PSA electrotinning insoluble anode system and a production method of an electrotinning plate, and relates to the technical field of electrotinning. The PSA tin electroplating insoluble anode system comprises an electroplating additive which is composed of benzotriazole, N-oleoyl sarcosine, S-carboxyethyl thiosuccinic acid and sodium citrate. The problems of serious black ash and poor coating performance of an electroplated tin plate product are solved, the tin plating stability of a plating solution in an electroplating bath is improved, the black ash on the surface of the electroplated tin plate product can be effectively reduced, the requirements of low black ash and high adhesive force on the surface of an electroplated tin plate of a PSA (Pressure Swing Adsorption) electroplated tin insoluble anode system are met, and the service life of the electroplated tin plate is prolonged. The electroplated tin plate produced through the PSA electroplated tin insoluble anode system is bright and clean in plating layer surface, and after the tin layer surface with the thickness of 8.4 g / m < 2 > and below is wiped through test paper, the reduction percentage of the test paper whiteness caused by black ash is smaller than or equal to 10%.

The invention discloses a preparation method and application of autologous fibrin glue, and belongs to the field of biomedical materials. The preparation method comprises the following five steps: collecting autologous venous blood, adding a sodium citrate anticoagulant with the volume ratio of 1: (8-12), and storing at 4-6 DEG C for not more than 2 hours; performing step-by-step centrifugation at the speed of 1500 to 2000 r / min and the speed of 3500 to 4000 r / min to obtain a fibrinogen concentrate; the thrombin-calcium chloride activation solution A and the tranexamic acid activation solution B are mixed according to the ratio of 1: (2-3) to form a composite activation system; mixing the two components according to a mass ratio of 1: (0.8-1.2), and reacting at 25-37 DEG C for 3-5 minutes to form colloid; and pre-freezing at-40 to-60 DEG C, performing vacuum freeze-drying, and storing at 4-8 DEG C. During application, the colloid can be coated on an operation wound surface after being redissolved, or mixed with a growth factor to prepare a dressing for covering a chronic wound surface. The colloid is high in purity, stable in coagulation time, long in storage period, suitable for scenes such as surgical hemostasis and the like, and high in clinical value.

The invention relates to the technical field of corrosion prevention of oil field pipes, and particularly discloses electroplating liquid for a high-tungsten-content hydrogen sulfide corrosion resistant sleeve coating and a preparation process of the electroplating liquid. The invention discloses electroplating liquid for a high-tungsten-content hydrogen sulfide corrosion-resistant sleeve coating. The electroplating liquid comprises the following raw materials: 60-90 parts of a composite tungsten source; 40-70 parts of a nickel-cobalt main salt; 35-55 parts of a composite complexing agent; 1-5 parts of carboxylated graphene quantum dots; 1 to 5 parts of an aminated ZIF-8 derived carbon nanocage; 1-5 parts of a rare earth stabilizer; 1-4 parts of sodium hypophosphite; 1-4 parts of sodium citrate; 1-3 parts of a surfactant; 15 to 25 parts of a buffering agent; and 350 to 450 parts of deionized water. According to the single-layer electroplated layer, the interface stress of the multi-layer structure can be eliminated, so that other interface problems such as plating layer cracking caused by underground temperature fluctuation are avoided, it is guaranteed that the thickness of the plating layer reaches the standard, and then it is guaranteed that the plating layer has excellent corrosion resistance.

The invention aims to provide bio-based modified CNC-Pickering emulsified asphalt and a preparation method thereof, and belongs to the technical field of modified emulsified asphalt. Comprising the following components in parts by mass: 45 to 55 parts of matrix asphalt, 45 to 55 parts of deionized water, 1 to 5 parts of cellulose nanocrystal, 0.5 to 1 part of gamma-aminopropyltriethoxysilane, 0.5 to 1.5 parts of sophorolipid, 0.1 to 0.3 part of sodium citrate, 0.1 to 0.3 part of sodium tripolyphosphate, 0.5 to 2 parts of polyvinyl alcohol, 0.1 to 0.3 part of xanthan gum and 0.05 to 0.1 part of butylated hydroxytoluene. The cellulose nanocrystal and Pickering emulsification technology are combined, so that the stability of the emulsified asphalt can be improved, the ageing resistance, high temperature resistance and low temperature resistance of the emulsified asphalt can be improved, and the high-performance requirement of road engineering on the emulsified asphalt can be met.

The invention relates to a preparation method of a biomass-based degradable dust suppressant and a spraying device. The biomass-based degradable dust suppressant is prepared from the following components in percentage by weight: 0.78% of a biological matrix, 20.7% of a salting-out salt solution and the balance of an acetic acid solution diluted by deionized water, the method comprises the following specific steps: adding biological matrix powder into an acetic acid solution; the salting-out salt solution powder is poured into a biological matrix acetic acid solution, magnetic stirring is conducted for 30 min under the conditions that the rotating speed is 200 r / min and the temperature is 30 DEG C, and then ultrasonic treatment is conducted for 10 min for full reaction; a salting-out method and a dust suppression technology are combined, high-concentration salt solutions such as sodium citrate and sodium sulfate are selected, physical and chemical effects between salt ions and biomass material molecules are utilized, and the limitation of a traditional cross-linking mode is broken through the synergistic effect of salting-out auxiliary precipitation and weak ion cross-linking net forming; according to the present invention, the long-acting and safe dust suppression agent can be simply and conveniently prepared, the dust suppression efficiency can be effectively improved, and the dust suppression cost can be effectively reduced.

The invention relates to the technical field of high polymer materials, in particular to a color-spun superfine sea-island imitation sheepskin fabric and a production method thereof. The color-spun superfine sea-island imitation sheepskin fabric comprises the following raw materials in parts by weight: color-spun superfine sea-island fibers, conventional polyester filaments and a functional additive, the color spinning superfine sea-island fiber is formed by blending alkali-resistant color master batches and a sea-island base material, the mass ratio of an island component to a sea component in the sea-island base material is (5-7): (3-5), and raw materials of the island component and the sea component are polyethylene terephthalate and polyethylene respectively; the functional additive comprises an alkali-resistant stabilizer, a dyeing auxiliary agent and a softening agent. According to the invention, sodium citrate and KH-550 in the alkali-resistant stabilizer react at a constant temperature, sodium citrate is dissolved in the process and forms weak interaction with amino of KH-550 to enhance the stability of the system, and ether bonds of polyoxyethylene fatty acid and sulfonic groups of lauryl sodium sulfate in the dyeing auxiliary agent form a synergistic effect to enhance the emulsifying and wrapping capacity to grease and color paste.

The invention relates to the technical field of nano-agent preparation, in particular to a nano-agent capable of promoting germination and resisting viruses, which comprises the following raw materials in percentage by weight: 0.0005-0.1% of carboxyl modified nano-selenium particles with the particle size of 10-100 nm, 0.0005-0.1% of nano-selenium powder with the particle size of 10-100 nm, and the balance of water. The content of the polyethyleneimine modified nano silver particles is 0.0001%-0.05%, and the particle size of the polyethyleneimine modified nano silver particles 0.01%-5% of a stabilizing agent, wherein the stabilizing agent is one or more of polyvinylpyrrolidone (PVP), trehalose or sodium citrate; 0.1%-5% of a pH regulator, wherein the pH regulator is a phosphate buffer solution; 1%-5% of a freeze-drying protective agent, wherein the freeze-drying protective agent is mannitol; and the balance of deionized water. Compared with nano-selenium and nano-silver, the nano-agent capable of promoting germination and resisting viruses and the preparation method of the nano-agent have the advantages that the effect of reducing the ToBRFV content and PSTVd content of tomato and pepper seeds can be better, the effect of promoting growth of tomato and pepper plants can be achieved, and growth of stems and roots can be promoted.

The invention discloses a photocatalytic self-cleaning detergent and a preparation method thereof, and the photocatalytic self-cleaning detergent comprises the following components by weight: 5-10 parts of a TiO2-zeolite compound; 2 to 3 parts of parachlorometaxylenol; 5-8 parts of sodium citrate; 3-5 parts of sodium silicate; 1 to 2 parts of polyvinylpyrrolidone; 20 to 30 parts of a surfactant; 0.2-1 part of an enzyme preparation; 2-3 parts of a pH regulator; and 50-70 parts of water. According to the photocatalytic self-cleaning detergent disclosed by the invention, the absorption of ultraviolet rays is promoted through PCMX, so that the TiO2-zeolite compound is excited to generate active oxygen with strong oxidizing property, the degradation efficiency of the detergent on stubborn organic stains is improved, and the problems that TiO2 is poor in dispersity in the detergent and the illumination activation is limited are solved; stable release of the photocatalytic material in the washing process is achieved, the continuous and efficient cleaning effect is ensured, and the method can be applied to hospitals or industries and other scenes needing large-scale and deep cleaning.

The invention discloses a heterojunction composite material and a preparation method and application thereof, and belongs to the technical field of catalysts, and the preparation method comprises the following steps: dispersing LaFeO3 and g-C3N4 in water, adding CuCl2, uniformly stirring, adding a sodium citrate aqueous solution, continuously stirring for 12-24 hours, centrifuging, washing and drying to obtain the heterojunction composite material; the mass ratio of the LaFeO3 to the g-C3N4 to the CuCl2 is (10 to 30) to (70 to 90) to (10 to 30). According to the invention, two narrow-band gap semiconductors (LaFeO3 and Cu2O) and a wide-band gap semiconductor (g-C3N4) are compounded to form the composite material with the double-heterojunction structure. As a photocatalyst, the material can be effectively applied to pollution control, and has excellent capabilities of removing organic water pollutants and air pollutants and sterilizing.

The invention discloses a magnetic biochar coupled dynamic membrane synergistic pollution reduction and flora regulation method, which comprises the following steps: adding magnetic biochar into an anaerobic dynamic membrane bioreactor for anaerobic digestion reaction, and adding 1.2-1.5 g of magnetic biochar into each liter of sludge mixed liquid in the anaerobic dynamic membrane bioreactor. The magnetic biochar is composed of a honeycomb-shaped carbon material obtained by pyrolyzing carbon through sodium citrate and Fe3O4 loaded on the surface of the honeycomb-shaped carbon material through a chemical coprecipitation method. According to the method, functional microorganisms such as methane filamentous bacteria and methane rod bacteria can be selectively enriched, the methane yield is increased by 30%-35%, membrane pollution is effectively relieved by improving the sludge floc structure, the service life of the membrane is prolonged, and technical support is provided for low-cost and low-energy-consumption operation of the anaerobic membrane bioreactor.

The invention discloses a tough underwater superoleophobic gel composite coating and a preparation method thereof.The preparation method specifically comprises the following steps that 1, a base material is soaked in a mixed solution of tannic acid and 3-aminopropyltriethoxysilane, after a period of time, the base material is taken out and soaked in a ferric chloride solution, and a nano-particle modified filter screen is obtained after drying; (2) loading the gel precursor solution on a nanoparticle modified filter screen through a dip-coating method, and preparing a gel composite filter screen under ultraviolet initiation; and (3) soaking the gel composite filter screen in a sodium citrate aqueous solution, and taking out the gel composite filter screen to obtain the tough underwater super-oleophobic gel composite coating modified fishing net. According to the method, the tough underwater super-oleophobic gel composite coating modified fishing net is prepared by adopting an impregnation method and ultraviolet initiation, the preparation process is simple, and the prepared gel composite coating has excellent oil stain resistance, mechanical stability and chemical stability and can be applied to crude oil adhesion prevention and oil-water separation of industrial oily wastewater.

The invention discloses food-grade metal surface blackening liquid as well as a blackening process and application. The blackening liquid comprises a basic blackening component and a modified graphene solution, wherein the basic blackening liquid comprises 15-25 g / L of sodium pyrophosphate, 8-12 g / L of sodium molybdate, 20-30 g / L of sodium gluconate, 2-5 g / L of sodium erythorbate, a citric acid / sodium citrate buffer solution, 10-15 ml / L of polyethylene glycol and 0.5-1 ml / L of polysorbate 80; the modified graphene is PEI modified graphene oxide. According to the method, stubborn dirt is cleaned and peeled off through ultrasonic waves, and grease is degraded through photocatalysis of nano TiO2, so that the surface hydrophilicity is improved, and the adsorption uniformity of blackening liquid is enhanced; according to the method, Si-O-Si network crosslinking is optimized through staged heating (80 DEG C to 120 DEG C to 140 DEG C), the hardness and the adhesive force are improved, thermal stress concentration in a traditional process is avoided, meanwhile, raw material decomposition can be avoided at the temperature, and the safety of blackening liquid is further guaranteed.

The invention discloses a preparation method of modified mineral powder for adjusting and controlling the viscosity of concrete. The preparation method of the modified mineral powder comprises the following steps: placing vertical mill mineral powder in a hydrochloric acid solution for ultrasonic treatment and infiltration to obtain activated mineral powder; preparing a sodium alginate solution and a calcium chloride cross-linking solution, adding the activated mineral powder into the sodium alginate solution to obtain a mineral powder suspension, and dropwise adding the mineral powder suspension into the calcium chloride cross-linking solution to react to obtain calcium alginate coated mineral powder; the preparation method comprises the following steps: dissolving sodium citrate, glucolactone and active nano silicon dioxide in water to form precursor sol; and adding the calcium alginate coated mineral powder into the precursor sol to obtain the modified mineral powder. The modified mineral powder prepared by the method disclosed by the invention realizes double effects of morphology regularization and viscosity controllability, and has an adjusting and optimizing effect on the viscosity problem of concrete when being applied to the concrete; and the method improves the activity of the mineral powder and the bonding strength of interfaces of the mineral powder and other components at the same time, so that the compactness and the overall strength of the concrete are improved.

The invention discloses a selenium-rich polysaccharide-protein-polyphenol conjugate as well as a preparation method and application thereof, and belongs to the technical field of food processing. According to the method, hovenia acerba is taken as a raw material, the extraction efficiency is improved through organic solvent degreasing and two-stage dynamic extraction combined with ultrasonic pretreatment, a Na2HPO4 buffer solution and a sodium citrate buffer solution are adopted for step-by-step extraction and enzymolysis purification, and a polysaccharide-protein-polyphenol conjugate is obtained; a nano cellulose dispersion stabilizer and a light source with a specific wavelength are further introduced into a photocatalytic reaction, a selenium source and the conjugate are efficiently chelated, and finally the compound with the particle size of 80-120 nm and the selenium content of 3.5-4.5% is prepared through dialysis and freeze-drying. The obtained product has excellent oxidation resistance and hypoglycemic activity, can be applied to preparation of functional food or drugs for preventing and treating diabetes, is suitable for the fields of anti-inflammation, intestinal micro-ecological regulation and drug sustained-release carriers, and has high efficiency and safety.