1833 results about "Distilled water" patented technology

The invention relates to a method for preparing a lithium iron phosphate / carbon composite material of a lithium ion battery, which belongs to the technical field of lithium ion batteries. The method for preparing the lithium iron phosphate / carbon composite material of the lithium ion battery comprises the following steps of: 1) preparing a suspending graphene-dispersed aqueous solution system, namely, crushing graphite to 1 to 5 microns, adding the crushed graphite into distilled water or purified water, adding 0.1 to 5 percent of surfactant, heating with stirring the mixed solution to 180 to 250 DEG C in a sealing way, performing stirring for 2 to 6 hours and reducing the temperature; 2) crushing lithium iron phosphate to the particle size of 1 to 5 microns, adding the crushed lithium iron phosphate into the distilled water or the purified water, adding with stirring 0.01 to 1 percent of coupling agent, performing uniform stirring, adding the graphene-dispersed aqueous solution, and performing stirring and filtration; and 3) vacuum-drying solid powder obtained by the filtration, and calcinating the dried solid powder for 2 to 12 hours to obtain the graphene-coated lithium iron phosphate cathode material. The method has the advantages of simple process, high material performance, high conductivity, high bulk density, high compacted density and the like.

The invention discloses a composite electrode material for a zinc-bromine flow battery and a preparation method and application thereof, and the preparation method comprises the following steps: S1, uniformly stirring a copper salt, a zinc salt, a sodium salt and distilled water at room temperature, aging in air, and then filtering, washing and drying to obtain a zinc-copper composite salt; s2, adding a polymer into an organic solvent under a stirring condition, and stirring under a water bath condition to obtain a spinning solution; then adding zinc-copper composite salt, stirring and then carrying out ultrasonic dispersion to obtain a composite spinning solution; s3, preparing the composite spinning solution into a precursor nanofiber material by utilizing high-voltage electrostatic spinning; and S4, carrying out pre-oxidation and carbonization treatment on the precursor nanofiber material in an atmosphere furnace, and cleaning and drying the carbonized material to obtain the composite electrode material for the zinc-bromine flow battery. According to the invention, the problems of low surface activity of bromine electrode reaction on an electrode material, unstable electro-catalytic performance, bromine permeation and the like in the zinc-bromine flow battery can be solved.

The present invention relates to the technical field of water distillers, and disclosed are a thermocompression multi-effect water distiller system and a control method therefor. The thermocompression multi-effect water distiller system comprises a distillation unit and a control unit; the distillation unit comprises a multi-effect evaporator; the multi-effect evaporator is a horizontal tube falling film evaporator and has a side-by-side configuration, and the shell pass of a preceding effect evaporator is communicated with the tube pass of a following effect evaporator; the control unit controls the distillation unit during working, and the control unit is a feedforward-cascaded fuzzy PID model predictive control system and comprises an inner-loop control system and an outer-loop control system; the inner-loop control system uses fuzzy PID control, and the inner-loop control system is provided with a control system for fluctuations in industrial steam pressure Psteam; and the outer-loop control system uses model predictive control. In the present invention, by using the thermocompression multi-effect water distiller system and the control method therefor, the heat exchange efficiency is greatly improved; and a novel control system is provided, enabling normal operation within a range of 40-200% of a set operating condition.

The invention discloses an oxygen-sulfur double-vacancy modified SnO2 / SnS2 / C nano material as well as a preparation method and application thereof, and belongs to the technical field of electrode materials. The preparation method comprises the following steps: mixing a structure regulating agent with tin salt, dropwise adding alkali liquor, stirring, and carrying out suction filtration to obtain Sn6O4 (OH) 4; the preparation method comprises the following steps: adding glucose and polyvinylpyrrolidone into distilled water, stirring to form a uniform solution, adding Sn6O4 (OH) 4 into the uniform solution, stirring, and carrying out ultrasonic and hydrothermal reaction to obtain SnO2 / glucose; and calcining the SnO2 / glucose and a sulfur source in an inert atmosphere to obtain the SnO2 / SnS2 / C nano material modified by oxygen and sulfur double vacancies. The SnO2 / SnS2 / C disclosed by the invention is used for a lithium / sodium ion battery negative electrode, can effectively relieve volume expansion of tin-based oxysulfide and improve the conductivity of an electrode material, and shows high charge-discharge specific capacity, excellent rate capability and high-rate long-cycle stability.

The invention provides a material for removing sodium ions in saline-alkali soil and a preparation method, and relates to the field of sodium ion adsorbents, the preparation method comprises the following steps: (1) lignin modification: under a water bath condition, dissolving sulfate lignin in a mixed solution of analytically pure acetic acid and 30% hydrogen peroxide, then adding ferric chloride, reacting for 1.5-2.5 hours, diluting with distilled water by 7-8 times, centrifuging and washing to obtain modified lignin; drying to obtain oxidized lignin; (2) hydrogel synthesis: mixing and stirring the oxidized lignin and analytically pure acrylic acid, adding a cross-linking agent and an initiator, and reacting in a drying oven at 65-75 DEG C for 1.5-2.5 hours to form a sodium ion adsorption material with a porous interpenetrating network structure; by modifying the lignin, particularly introducing more hydroxyl and carboxyl groups, the performance of the lignin in the application of adsorbing ions, preparing hydrogel and the like can be improved.

The present invention generally relates to a method for synthesizing NiO / ZnO nanoparticles using solution combustion synthesis. The method comprising: dissolving 10 grams of Zinc nitrate hexahydrate (Zn(NO3)2·6H2O) and 10 grams of Nickel(II) nitrate hexahydrate (Ni(NO3)2·6H2O) in 30 ml of double-distilled water to obtain a solution; adding at least one fuel selected from a group consisting of glucose, urea, and combinations thereof to the solution; stirring the solution for one hour to achieve homogeneity and transferring the homogeneous solution into a Pyrex dish; placing the dish inside a preheated muffle furnace at a temperature range of 440° C. to 460° C. and allowing the solution to boil, froth, and undergo exothermic combustion thereby retrieving the resulting fine nanoparticle powder upon completion of the reaction within 20 minutes; and cooling the synthesized powder to room temperature and grinding the powder to achieve a fine, uniform consistency, thereby forming NiO / ZnO nanoparticles.

The invention relates to the technical field of solid waste recycling, in particular to a low-temperature fast-fired ceramic aggregate prepared from electrolytic manganese residues and a method thereof.The method comprises the steps that S1, the electrolytic manganese residues and low-temperature flux are subjected to ball milling and sieved through a 200-325-mesh sieve, and a fine powder blank is obtained; s2, 70-100 parts of electrolytic manganese residues and 2-20 parts of low-temperature flux are evenly mixed, and then a mixture is obtained; s3, adding an external binder into the mixture, aging, adding into a sugarcoating machine, stirring, and spraying distilled water to obtain a spherical ceramic aggregate green body; and S4, drying the spherical ceramic aggregate green body in a drying oven, and quickly firing in a silicon carbide rod furnace to obtain the ceramic aggregate subjected to low-temperature quick firing. The electrolytic manganese residues are rapidly sintered at the low temperature of 1000 DEG C or below, sulfur curing can be achieved, meanwhile, under the action of quartz particles, generated CaSO4 has the high specific surface area, heavy metal elements can be effectively adsorbed and subjected to solid solution, and full utilization of the industrial solid waste electrolytic manganese residues is achieved.

The invention discloses a grouting reinforcement material and a preparation method and application thereof, and the method comprises the following steps: mixing a sodium silicate aqueous solution, a chain extension cross-linking agent, distilled water and a composite catalyst to obtain a component A; reacting the polymethylene polyphenyl polyisocyanate with polyether polyol to obtain an isocyanate prepolymer, and carrying out self-polymerization on the polymethylene polyphenyl polyisocyanate under the action of a catalyst to obtain an isocyanate polymer; the preparation method comprises the following steps: mixing a component A and a component B according to a mass ratio of (1.2: 1)-(1: 1.2), then stirring an isocyanate prepolymer, an isocyanate polymer, a plasticizer and a diluent at room temperature and constant temperature to obtain the component B, and finally mixing the component A and the component B according to a mass ratio of (1.2: 1)-(1: 1.2) to obtain the target grouting reinforcement material. The invention aims to realize effective compounding of an organic phase and an inorganic phase, and the prepared reinforcing material has early strength and toughening, low heat release, and environment-friendly grouting performance capable of being cured in water.

The invention discloses a metal particle Ni supported catalyst based on fly ash. The preparation method comprises the following steps: firstly, carrying out alkali fusion on fly ash to prepare powder; dissolving the powder and Ni (NO3) 2.6 H2O in a mixed solution of distilled water and absolute ethyl alcohol, adding polyethylene glycol, and performing ultrasonic stirring to obtain uniform dispersion liquid; and finally, continuously performing ultrasonic stirring on the dispersion liquid, performing hydrothermal reaction, cooling, performing centrifugal separation, drying, calcining, cooling and grinding to obtain the catalyst. The coal ash derivative zeolite is adopted as a carrier of the catalyst, Ni is loaded on the carrier to improve the specific surface and effective active sites of the carrier, the effective catalytic specific surface area of the catalyst is effectively improved, and the catalytic activity is improved, so that a stable and safe catalyst material for preparing methane through CO2 hydrogenation with high activity and selectivity is obtained; the space time yield of methane is high.

The invention provides a culture medium formula capable of effectively improving vibrio inhibition capability of bacillus. The culture medium formula comprises 10-20 g of corn starch, 2-10 g of yeast powder, 2-10 g of malt extract, 5-20 g of glycerin, 0.5-1 g of L-aspartic acid, 1 g of dipotassium phosphate, 0.3 g of monopotassium phosphate, 0.5 g of magnesium sulfate, 1 g of calcium carbonate and 1000 mL of distilled water. When the culture medium is used for culturing bacillus capable of naturally inhibiting vibrio, the obtained culture has a better vibrio inhibiting effect.

The invention relates to the technical field of distilled water machines, in particular to a distilled water machine with a heat recovery function and a using method thereof.The distilled water machine comprises a distilled water machine body, a filter and a heat exchange box, the filter comprises a horizontally-arranged filter barrel, a fixing base is installed in the filter barrel, and filter plates are arranged on the upper side and the lower side of the fixing base; baffles are arranged in the filtering cavity and the cleaning cavity, one end of each baffle is rotationally connected to the fixing base through a horizontal shaft, and the other end of each baffle rotationally abuts against the inner wall of the filtering barrel; each impurity removal cavity communicates with a water inlet pipe and a water outlet pipe, the water inlet pipe is provided with a one-way valve and communicates with a water pump, and the water outlet pipe is provided with an electromagnetic valve. The two baffles can be overturned in the filter barrel, so that the two filter plates alternately filter steam, impurities on the surfaces of the filter plates are automatically cleaned, and a worker does not need to suspend distillation of distilled water during cleaning of the filter plates. The device has the beneficial effect that the distillation efficiency of distilled water is improved.

The invention provides a coated paper for packaging and a preparation method thereof. The coated paper comprises the following raw material components: 20-25 parts of modified corn starch citrate, 75-80 parts of alginic acid, 20-25 parts of polypropylene carbonate, 20-25 parts of polylactic acid, 1-3 parts of glycerol, 1-3 parts of polyhydroxystearic acid and 2-2.5 parts of carboxymethyl cellulose. The preparation method of the modified corn starch citrate comprises the following steps: in a reaction kettle, preparing a citric acid solution with a mass percentage of 0.8-1.2% by using distilled water, and heating the solution to 35-38 DEG C; starting stirring; adding corn starch to the citric acid solution while stirring, and reacting for 2.5-3 hours; then, adjusting the pH value of the solution in the reaction kettle to be alkaline with sodium hydroxide, cooling the solution to 26-28 DEG C, adding octenyl succinic anhydride and sodium alginate, and continuing stirring and reacting for 30-50 minutes; after the reaction, standing and filtering; drying and grinding the filtered solid to 80-100 meshes. The coated paper prepared by the invention is environmentally friendly, safe and easily degradable.

A preparation method of a bacteriostatic and antioxidant zein / hyaluronic acid degradable preservative film relates to the field of foods.The method comprises the steps that a zein-hyaluronic acid solution and a citrus polyphenol solution are mixed, distilled water is dropwise added, vacuum concentration is performed, the mixture is mixed with a laminarin solution, auxiliary materials are added, uniform mixing, bubble removing and film preparing are performed, and the preservative film is obtained. After drying, obtaining a zein-HA film of laminarin and citrus polyphenol; or mixing the zein-hyaluronic acid solution with the moringa oleifera leaf extract powder, dropwise adding distilled water, concentrating under reduced pressure, mixing with the laminarin solution, adding the sodium alginate solution and auxiliary materials, defoaming, pouring to form a film, and drying to obtain the zein-HA film of the laminarin and the moringa oleifera leaf extract. The synergistic effect among the substances of the protein film can effectively improve the fresh-keeping effect of the composite film, and the release property of the composite film can further improve the fresh-keeping effect on fresh-cut food.

A brine concentration system may include a closed-cycle heat pump, a brine heater configured to heat brine, a flash tank to evaporate a portion of heated brine to steam, and a steam condenser in which to condense the steam to distilled water. The system may include an electric vacuum pump in connection with the flash tank and the steam condenser. The electric vacuum pump may reduce a pressure within the flash tank and the steam condenser to reduce a boiling point of the brine. The system may include a controller that dynamically adjusts operations of the closed-cycle heat pump and / or the electric vacuum pump.

The preparation method comprises the following preparation steps: firstly, crushing dried plumeria rubra petals, soaking the crushed plumeria rubra petals in distilled water, decocting the crushed plumeria rubra petals twice, combining filtrate, and concentrating the filtrate to obtain a plumeria rubra extracting solution; the plumeria rubra extracting solution and a rhodococcus strain are subjected to two-stage seed solution culture, then are mixed with a fermentation culture medium in a specific proportion, and are fermented under proper conditions to generate plumeria rubra fermentation liquor containing 3-cyanopyridine hydratase. Then, the fermentation liquor is subjected to biological catalysis to convert nicotinonitrile into nicotinamide, and through the steps of decoloration, filtration, concentration and the like, the plumeria rubra extract containing nicotinamide is finally obtained.

The invention discloses a preparation method of ocimum gratissimum carbon dots and application of the ocimum gratissimum carbon dots in antibacterial drugs and food preservation. The preparation method of the ocimum gratissimum carbon dots comprises the following steps: performing steam distillation on ocimum gratissimum leaves to remove essential oil, drying in the shade, and crushing; adding an alcohol solvent into the powder, extracting, filtering, concentrating and drying to obtain an alcohol extract; dispersing the alcohol extract in distilled water, and stirring and pyrolyzing on a heating table; and diluting the pyrolysis product with distilled water, centrifuging, taking supernate, filtering with a filter membrane, dialyzing, and freeze-drying to obtain the carbon dots. The obtained carbon dots have a carbon dot-vesicle coexisting structure, and the average particle size is 5.732 + / -0.5 nm. The prepared ocimum gratissimum carbon dots can be applied to preparation of antibacterial drugs, especially drugs for inhibiting the activity of bacillus cereus and listeria, and the field of food preservation, and have the advantages of being wide in raw material source, simple in preparation method, low in cost, environmentally friendly and the like.

The invention relates to a bisulfonate hydrophobic association polymer oil-displacing agent with a benzene ring structure and a preparation method thereof. The polymer oil-displacing agent is formed by copolymerization of three monomers, namely acrylamide, sodium 2-allyl methylamino ethanesulfonate and long-chain alkyl disulfoethyl (4-vinyl benzyl) betaine which is a hydrophobic monomer with the benzene ring structure. The preparation method comprises the following steps: firstly adding distilled water, sequentially adding acrylamide, 2-allylmethylamino sodium ethanesulfonate and long-chain alkyl disulfoethyl (4-vinyl benzyl) betaine, adding water to adjust the total concentration, introducing N2 to remove oxygen, adding an initiator, and reacting at a certain temperature to obtain the terpolymer. The polymer oil-displacing agent prepared by the invention has good water solubility and good temperature resistance and shear resistance, shows good salt resistance in saline water with the degree of mineralization being greater than or equal to 30000 mg / L, shows a good oil-displacing effect in heterogeneous rock cores, and can improve the crude oil recovery rate by 10% or above.

The invention discloses a coking inhibition additive for heat absorption type hydrocarbon fuel. The coking inhibition additive comprises hydrazine monohydrate, distilled water and stearic acid terminated hyperbranched polyethyleneimine CHPEI. The invention also provides a preparation method of the heat absorption type hydrocarbon fuel coking inhibition additive, which comprises the following steps: weighing hydrazine monohydrate, adding distilled water, and stirring until the hydrazine monohydrate and the distilled water are uniformly mixed; adding CHPEI particles, and stirring until the CHPEI particles are completely dispersed; the mixture is put into a high-speed homogenizer to be stirred, and it is ensured that the mixture is in a uniform sticky paste shape; the invention also provides an application of the heat absorption type hydrocarbon fuel coking inhibition additive. According to the coking inhibition additive and the application thereof provided by the invention, high-temperature coking of aerospace engine fuel can be effectively inhibited; and a pseudo-homogeneous system which is low in freezing point, good in overload resistance stability and uniform in appearance can be formed with hydrocarbon fuel.

The invention discloses an air cooling type heat exchanger structure capable of shunting and conducting heat. An air cooling type heat exchanger structure capable of shunting and conducting heat comprises a heat exchanger, and an air suspension fan is connected beside the heat exchanger, and is characterized in that a device body is arranged in the heat exchanger, a lower connecting frame is arranged below the device body, a water storage tank is fixed on the lower connecting frame, and a shunting connecting pipe is arranged beside the water storage tank; heat-conducting boxes are mounted on the surfaces of the shunting connecting pipes; an outer fixing shell is arranged in the device body. The air suspension fan is connected with the heat exchanger, during use, the water storage tank supplies water to the heat conduction box, the water flow is preheated in cooperation with the flow dividing connecting pipe, then when the water flow is sprayed to the fins, water drops with a certain temperature can be rapidly evaporated, air in the pipe bundle is cooled through cooperation of moisture and the fan, and the cooling effect of the air in the pipe bundle is improved. And redundant water flows downwards and is collected in the distilled water guide hopper to work circularly, so that the cooling speed is increased, and the air exchange efficiency is also improved.

The embodiment of the invention provides an evaporation system control method and an evaporation system, and relates to the technical field of control, the method is applied to a control system in an MVR evaporation system.The method comprises the steps that in response to a starting instruction, a feeding system is controlled to pump to-be-treated liquid into an evaporation crystallization system, and the real-time boiling point rise of the evaporation crystallization system is monitored; and determining to adopt an optimal recovery rate control mode or a boiling point rise control mode as a target control mode based on the real-time boiling point rise, and controlling the feeding system, the evaporative crystallization system and the water production system to treat the to-be-treated liquid according to a preset strategy corresponding to the target control mode, the frequency of the distilled water and the flow of the to-be-treated liquid pumped by the feeding system meet the corresponding recovery rate, so that the control intelligence and reliability of the MVR evaporation system are improved.

The present invention discloses a chloroplast-sodium alginate microsphere and its preparation method and use. The preparation method of the chloroplast-sodium alginate microsphere comprises: mixing chloroplasts, sodium alginate and distilled water to obtain a mixed solution of chloroplasts and sodium alginate as a dispersed phase; dissolving a nonionic surfactant and CaI2 or CaCl2 in liquid paraffin to form an oil phase as a continuous phase; the dispersed phase and the continuous phase are cross-linked under the operation of a microfluidic device to form chloroplast-sodium alginate microspheres. The chloroplast-sodium alginate microspheres of the present invention have the ability to generate oxygen under illumination and are sustainable for up to two weeks. Chloroplasts are immunomodulated by reprogramming sugar metabolism to achieve anti-inflammatory and repair-promoting effects. The chloroplast-sodium alginate microspheres are suitable for wound repair, especially for chronic hypoxic wound repair similar to diabetic wounds.

The invention relates to the technical field of photocatalysis, and provides a preparation method of a copper-cuprous oxide-copper bismuthate ternary complex, which comprises the following steps: adding sodium bismuthate dihydrate, copper sulfate and sodium sulfite into a hydrothermal reaction kettle containing distilled water to obtain a solid-liquid mixture; and the solid-liquid mixture generates the copper-cuprous oxide-copper bismuthate ternary compound under a hydrothermal condition through a synergistic effect of a heterogeneous interface in-situ oxidation-reduction reaction of sodium bismuthate and a sodium sulfite solution and a homogeneous oxidation-reduction reaction of a copper sulfate solution and the sodium sulfite solution. The preparation method has the advantages that the elemental copper-cuprous oxide-copper bismuthate ternary compound is prepared by a one-pot method through cooperation of the out-phase interface in-situ oxidation-reduction reaction and the homogeneous oxidation-reduction reaction, and the preparation method is simple in preparation step, convenient to operate and easy to quantitatively control.

The invention discloses a preparation method and application of crab shell chitin without chemical decolorization, and the preparation method comprises the following steps: crushing the crab shell of Eriocheir sinensis to obtain crab shell powder; dissolving crab shell powder in distilled water according to a ratio of 1: 10-1: 30 (w / v) to obtain a crab shell powder solution; treating the crab shell powder solution by using plasma jet (PJ), washing to be neutral, and drying to obtain plasma pretreated crab shell powder; dissolving the crab shell powder pretreated by the plasma into 0.1-3M hydrochloric acid (HCl) solution according to the ratio of (1: 10)-(1: 30) (w / v), and carrying out demineralization treatment; washing the demineralized solid matter to be neutral, performing deproteinization treatment by using 0.1-3M sodium hydroxide (NaOH) solution, washing to be neutral, and drying to obtain white solid crab shell chitin. In the extraction process of the crab shell chitin, a strong oxidant (such as H2O2) is not required to be used for decoloring, the color is close to that of commercial chitin, and the process is simple, green and environment-friendly; meanwhile, the production cost is reduced.

The utility model discloses a solar distillation device. The solar distillation device comprises a flat plate heat collection unit, a dynamic distillation unit, a condensation unit and a water storage unit, wherein the top of the flat plate heat collection unit is communicated with the bottom of the dynamic distillation unit; the dynamic distillation unit is provided with a liquid level sensor and an electromagnetic valve and is used for dynamically feeding water; the condensation unit is arranged at the bottom of the water storage unit. The device disclosed by the utility model has the beneficial effects that on one hand, the heated water quantity at any time is controlled through an ultrathin water flat plate heat collection and dynamic distillation mechanism, so that water to be distilled is rapidly heated to boil, and the distillation speed is accelerated; on the other hand, a large amount of water in the water storage unit is used for providing a cooling function for the condensation unit, enough heat absorption capacity is guaranteed, and condensation efficiency is improved.

The invention relates to the technical field of oxygen inhalation and humidification, and discloses a medical oxygen inhalation and humidification device which comprises a first box body, the top of the first box body is fixedly connected with a shell, the top end of the shell is fixedly connected with a second box body, the second box body is fixedly connected with an air outlet pipe, and the top of the first box body is fixedly connected with an air inlet pipe. The air inlet pipe is sequentially communicated with the first box body, the shell, the second box body and the air outlet pipe. According to the medical oxygen inhalation and humidification device, when oxygen inhalation operation is carried out, oxygen makes contact with distilled water in the first box body, humidification of the oxygen is achieved, and therefore follow-up humidification and oxygen inhalation operation can be conveniently carried out; according to the medical oxygen inhalation and humidification device, oxygen can make contact with distilled water by changing the valve on the air inlet pipe, humidification and oxygen inhalation are achieved, oxygen can be directly discharged, and normal oxygen inhalation operation is achieved; according to the medical oxygen inhalation humidification device, during humidification operation, the atomization piece is opened, atomized distilled water and oxygen are mixed and then inhaled by a patient, and the humidification effect is improved.

A dust suppression material with dual network reinforced structure and its preparation method is provided, which relates to the field of dust control technology. The material comprises by weight: 0.1-0.5 parts of sesbania gum, 0.1-0.9 parts of polyacrylamide, 0.1-0.5 parts of carboxymethyl cellulose, 0.06-0.14 parts of crosslinking agent, 0.11-0.19 parts of oxidant, 0.1-0.3 parts of water retaining agent, 0.2-1 parts of wetting agent, and the balance is distilled water. The dust suppressant with dual network reinforced structure produced by the present disclosure can effectively improve the hydrophilicity and adhesion of dust, form a dense protective film on the surface of dust, meet the requirements of dust suppressant adhesion and wettability for underground coal mining operations and outdoor coal storage filed, and will not cause secondary pollution to the environment.

A method for extracting lignin from lignocellulosic biomass using a non-choline chloride based natural deep eutectic solvent (NADES) formed from Citric Acid (CA) and Fructose (Fr) comprises mixing the biomass with the NADES, obtaining a lignin-NADES suspension, lyophilizing, rehydrating, and drying the suspension, and repeating the rehydration and drying steps to obtain lignin particles. The biomass used can be Ghaf biomass waste. The NADES preparation includes adding distilled water to reduce viscosity, mixing CA and Fr with distilled water in specific molar ratios of CA:Fr:distilled water of: 1:1:1, or 3:1:1, or 5:1:1, adjusting pH, stirring, and heating. The method also includes specific conditions for mixing, stirring, heating, and terminating the reaction. The lignin-NADES suspension is obtained through vacuum filtering and lyophilized by vacuum freeze-drying. The method avoids the use of acid-precipitation techniques, ensuring an efficient and environmentally friendly lignin extraction process.

The invention discloses a transparentizing reagent for clinical tissues and animal organs and a transparentizing imaging method. The transparent reagent is a mixed reagent formed by dissolving 1-ethylimidazole and 3-[3-(cholamidopropyl) dimethylamino] propanesulfonic acid inner salt (CHAPS) in distilled water; wherein the mass volume ratio of the 1-ethylimidazole to the distilled water is 5%-40%, and the volume ratio of the CHAPS to the distilled water is 5%-25%. The pretreated biological tissue is soaked in a transparentizing reagent, and tissue transparentizing is achieved. The transparent reagent disclosed by the invention can be used for effectively and rapidly transparentizing clinical tissues, and is fluorescence-friendly and wide in applicability.

The invention belongs to the technical field of nano functional materials and intelligent textiles, and particularly discloses a preparation method and application of high-brightness nitrogen-doped carbon quantum dots based on phycocyanin. The method is used for solving the problems of large difference and poor reproducibility when the same biomass in different batches is used for preparing the carbon dots in the prior art. Comprising the following steps: (1) freeze-drying spirulina, and grinding into powder to obtain spirulina powder; (2) extracting phycocyanin by utilizing spirulina powder; (3) phycocyanin is added into the reaction container, then distilled water is added, the adding amount ratio of phycocyanin to distilled water is 1 g: 33.3-50 mL, and full stirring is conducted; and then, carrying out carbonization treatment, cooling to room temperature, collecting the solution, and dialyzing for 24 hours, so that the solution outside a dialysis bag is a purified carbon quantum dot solution. According to the method, the phycocyanin is used as a single nitrogen source for the first time, the reproducibility of preparing the carbon dots from the same biomass in different batches is good, and large-scale production is facilitated.

The invention discloses a field water quality field detection method based on sampling depth pre-correction, the method uses an anti-interference high-precision water quality detector for detection, and the method comprises the following steps: S1, arranging the detector: floating the detector in a target water area, and connecting the detector with the shore through a cable; s2, acquiring a set depth: calculating the set depth according to the target depth required by detection and the change of the water loading amount in the detection process of the detector, and completing the pre-correction of the sampling depth; s3, releasing the pipeline: releasing the sampling pipeline of the detector according to the set depth obtained in the step S2; s4, cleaning and air-drying: preparing a detection chamber of the distilled water cleaning detector, and air-drying the detection chamber after cleaning; s5, sampling detection: collecting a water sample and completing water quality detection. The sampling depth can be pre-corrected, cleaning and air drying can be completed through self-produced distilled water, detection interference items are avoided from the two aspects of sampling depth errors and residues, it is guaranteed that a detection result truly corresponds to a detection position, and the detection precision is improved.