40results about How to "Fast separation rate" patented technology

The invention relates to a method of taking mulberry leaves as the raw materials to continuously extract the active ingredients of alkaloids, flavonoids and polysaccharides. The invention includes the following steps: the solvents of 20 percent to 90 percent ethanol or 10 percent to 90 percent acetone are selected for reflux extraction to obtain the filtrate and filter residue; the filtrate is concentrated and dissolved by adding water, the flavonoid compounds with the content of 30 percent to 50 percent are obtained by macroporous resin separation; the solution is treated by ion exchange resin separation to get the alkaloid compounds with the content of 40 percent to 60 percent after passes through the macroporous resin; the filter residue of the mulberry leaves is boiled and decolored by using the water, and the acid polysaccharide compounds with the content of 55 percent to 85 percent are obtained by 10 percent to 60 percent alcohol sedimentation. The invention continuously and efficiently separates three active ingredients of alkaloids, flavonoids and polysaccharides of the mulberry leaves by one-time feeding, all the steps are not disturbed mutually, the extraction rate is high, the process operation is simple, the cost is low, and the invention is conductive to industrial popularization and application.

The invention relates to the technical field of a material, and discloses a CoFe<2>O<4> / g-C<3>N<4> magnetic nanomaterial and a preparation method therefor. The preparation method comprises the steps of preparing g-C<3>N<4> nanosheets, and dispersing the g-C<3>N<4> nanosheets into ethylene glycol; then adding FeCl<3>.6H<2>O and CoCl<2>.4H<2>O and fully dissolving; and finally adding sodium acetate, stirring and calcining in a drying oven, and finally obtaining black sediments CoFe<2>O<4> / g-C<3>N<4>. According to the CoFe<2>O<4> / g-C<3>N<4> magnetic nanomaterial disclosed by the invention, the CoFe<2>O<4> nanoparticles are uniformly distributed on the g-C<3>N<4> nanosheets, so that CoFe<2>O<4> nanoparticle agglomeration can be prevented, and more active sites are provided to improve catalytic activity; in addition, the CoFe<2>O<4> nanoparticles are magnetic, so that the particles are distributed on the g-C<3>N<4> nanosheets sequentially to form bigger planar nanomaterials; and the planar nanomaterials can be separated more quickly under a magnetic field compared with independent CoFe<2>O<4> nanomaterials.

The invention discloses a modified carbon quantum dot loaded hollow tubular carbon nitride photocatalyst and a preparation method thereof. The photocatalyst takes hollow tubular carbon nitride as a carrier and is loaded with modified carbon quantum dots; urea and melamine with a mole ratio of 1-5:1 are used to prepare the hollow tubular carbon nitride through hydrothermal and calcination. The preparation method comprises the following steps of: mixing hollow tubular carbon nitride, water and modified carbon quantum dot solution, and drying to obtain the photocatalyst. The photocatalyst has the advantages of large specific surface area, large number of pores, multiple active sites, high speed of separation and migration of photo-generated carriers, strong light absorption capacity, high photocatalytic activity, high stability, high photocatalytic efficiency and the like; the preparation method of the photocatalyst has the advantages of convenience in synthesis, simplicity in operation,no secondary pollution to the environment and the like. The photocatalyst can be widely used for treating organic pollutants in the environment and killing harmful microorganisms in the environment,and has good application value and application prospect.

The invention relates to a method for enriching vitamin K2 in natto bacillus fermentation liquid. The method comprises the following steps of step 1, performing centrifugation on the natto bacillus fermentation liquid, and collecting supernatant; step 2, adding a flocculant and a filter aid to the supernatant obtained in the step 1, then performing stirring, performing centrifugation, and collecting supernatant; step 3, adding Fe3O4@SiO2-G nanometer microspheres which are reduced to the supernatant obtained in the step 2, regulating the pH to 6.0-8.0, then performing stirring treatment under the condition of 20-35 DEG C for 10-30min, and then collecting magnetic materials after adsorption; and step 4, adding hexane to the magnetic materials after adsorption, performing ultrasonic parsing for 5-20min, then externally applying a magnet, collecting magnetic nanometer materials, pouring out organic phase, and performing filtering, wherein filtrate is a hexane solution rich in vitamin K2. According to the method for enriching vitamin K2 in natto bacillus fermentation liquid, the VK2 in the natto bacillus fermentation liquid can be quickly and efficiently enriched. The method has the advantages that the specific steps are simple, the materials are low in price, and can be reused, and the enrichment effect is efficient.

The invention provides an aperture-controllable CS / PLA oil-water separating nanometer fiber film and a preparation method thereof, and the preparation comprises the steps of dissolving PLA in a solvent to obtain a PLA solution; dissolving CS in a solvent to obtain a CS solution; mixing the PLA solution and the CS solution and adding waterless ethanol and stirring for 3-5 h to obtain a uniform sol spinning liquid. The aperture-controllable CS / PLA oil-water separating nanometer fiber film can be obtained by static spinning, peeling and drying. The CS / PLA oil-water separating nanometer fiber film is obtained by static spinning; and the aperture among fibers is controlled by adjusting mesh number of a receiving net. Therefore, the process is simple, the cost is low; the process is green and has no pollution, and the film can be conveniently applied. The prepared nanometer fiber film has a relatively high oil separation efficiency; the separating speed is fast; the separating effect is good; the film can be repeatedly used; the film has a good stability; a stable separating efficiency to oil-and-water mixture of different pH values can be maintained.

The invention discloses a molybdenum carbide modified tubular carbon nitride photocatalytic material and a preparation method and application thereof. The molybdenum carbide modified tubular carbon nitride photocatalytic material comprises molybdenum carbide and tubular carbon nitride, wherein the surface of the tubular carbon nitride is modified with the molybdenum carbide. The preparation methodcomprises the steps: suspending the tubular carbon nitride in methanol, so as to obtain a suspension; dispersing the molybdenum carbide in the suspension, carrying out intensive mixing, and carryingout drying, thereby obtaining the molybdenum carbide modified tubular carbon nitride photocatalytic material. According to the molybdenum carbide modified tubular carbon nitride photocatalytic material disclosed by the invention, an energy band structure of the carbon nitride is improved to form molybdenum carbide / carbon nitride heterojunction, so that the effective separation of photoproduction electron-hole pairs is achieved, the utilization efficiency of photoproduction electron-holes is increased, and the effect of photocatalytic degradation is promoted; the molybdenum carbide modified tubular carbon nitride photocatalytic material can be applied to degradation of antibiotics or dyes in wastewater.

The invention discloses a rod-like CuxO photocatalytic material as well as a preparation method and application thereof. The preparation method comprises the following steps: (1) putting anhydrous cupric sulfate, hexadecyl trimethyl ammonium bromide and water into a flask, and uniformly stirring so as to obtain a mixed liquid; (2) putting an egg membrane into the flask, and performing uniform stirring so as to obtain a turbid liquid; (3) transferring the turbid liquid into an egg shell, putting the egg shell into a flask with a sodium hydroxide solution, and performing an oil bath reaction; (4) centrifuging the obtained solution, collecting a product, and performing washing and drying so as to obtain a sample; and (5) calcining the sample, so as to obtain a copper-based photocatalytic material for visible photocatalytic sterilization. The egg shell is adopted as a reactor to prepare the rod-like CuxO photocatalytic material under a gentle condition, because of the rod-like structure, the material has a large specific surface area, meanwhile, more surface active sites can be exposed, and the visible photocatalytic antibacterial activity of the material can be effectively improved.

The embodiment of the invention discloses a preparation method of a TiO2 / gC3N4 composite photocatalyst, and belongs to the field of chemistry. The preparation method comprises the following steps: dispersing graphite-phase carbon nitride and titanium dioxide in a solvent according to a mass ratio of (1-7):(9-3), and conducting heating to volatilize the solvent at 50-100 DEG C until a dry powdery mixture is obtained; and annealing the mixture for 1-3 hours at the heating speed of 1-8 DEG C / min under the condition of 200-550 DEG C to obtain the titanium dioxide / graphite phase carbon nitride composite photocatalyst. The catalyst can effectively promote rapid separation of photon-generated carriers on a junction interface, so that the photocatalytic activity of the catalyst is improved.

The invention discloses an ultrasonic leaching-extracting separating method of low-yttrium middle-heavy typed rare earth ore, which is characterized by the following: adopting low-yttrium middle-heavy typed rare earth ore as raw material and alcaine solution as leaching liquid; blending P507 or P204 and kerosene as extracting liquid; leaching low-yttrium middle-heavy typed rare earth ore to extract and separate at 5-60 deg.c; setting the ultrasonic frequency at 19-80kHz and ultrasonic strength at 0.2-20.0W / cm2; obtaining yttrium rare earth element hydrochlorate enriched material as extracting phase and cerium group rare earth hydrochlorate enriched material as residual phases.

The invention belongs to the field of nano materials, and discloses a preparation method of a carbon material loaded tubular carbon nitride photocatalyst. The photocatalyst with large specific surface area, multiple active sites, high photon-generated carrier separation and migration rate, low photon-generated carrier coincidence rate, visible light absorption red shift, high photocatalytic activity and high stability is obtained by adjusting the mass fraction of the carbon material. The preparation method comprises the following steps: S1, uniformly mixing the carbon material with sodium chloride, potassium chloride, lithium chloride and melamine, and calcining in a corundum crucible; in the step S1, the preparation method of the carbon material comprises the following steps: (1) cutting the white part of the shaddock peel into blocks, drying, soaking in a KOH solution, and freeze-drying; (2) calcining a sample in a tubular furnace, and washing the sample with HNO3 and ultrapure water until the sample is neutral to obtain a carbon material; and S2, washing the product with ultrapure water and ethanol, drying and collecting. The photocatalyst obtained by the invention promotes the improvement of the hydrogen production performance by photolysis of water, and provides a new thought for further development of efficient photocatalysts.

The invention discloses a precipitate flotation separation system of rubidium and cesium in an aqueous solution and application thereof. The precipitate flotation separation system comprises a precipitant, a collecting agent and a foaming agent, wherein the precipitant at least comprises phosphomolybdate, and the collecting agent and the foaming agent at least include a cationic surfactant. The invention also discloses a flotation separation method of rubidium and cesium ions in the aqueous solution. The flotation separation method comprises the steps of adding the precipitant, the collectingagent and the foaming agent into the aqueous solution containing the cesium ions for a reaction to precipitate the cesium ions, wherein the precipitant at least comprises phosphomolybdate, and the collecting agent and the foaming agent at least comprise the cationic surfactant. Precipitated solids obtained by the reaction are collected through flotation separation treatment. The precipitate flotation system taking phosphomolybdate as the precipitant is provided through the combination of precipitation and flotation processes, can be used for separating and extracting rubidium and cesium resources or removing rubidium and cesium ions in radioactive waste liquid, and can solve the problems of dissolution loss of loaded ammonium phosphomolybdate adsorbents, complex material preparation and the like in a use process.

The invention discloses a precipitate flotation separation system of rubidium and cesium in an aqueous solution and application thereof. The precipitate flotation separation system comprises a precipitant, a collecting agent and a foaming agent, wherein the precipitant at least comprises phosphomolybdate, and the collecting agent and the foaming agent at least include a cationic surfactant. The invention also discloses a flotation separation method of rubidium and cesium ions in the aqueous solution. The flotation separation method comprises the steps of adding the precipitant, the collectingagent and the foaming agent into the aqueous solution containing the cesium ions for a reaction to precipitate the cesium ions, wherein the precipitant at least comprises phosphomolybdate, and the collecting agent and the foaming agent at least comprise the cationic surfactant. Precipitated solids obtained by the reaction are collected through flotation separation treatment. The precipitate flotation system taking phosphomolybdate as the precipitant is provided through the combination of precipitation and flotation processes, can be used for separating and extracting rubidium and cesium resources or removing rubidium and cesium ions in radioactive waste liquid, and can solve the problems of dissolution loss of loaded ammonium phosphomolybdate adsorbents, complex material preparation and the like in a use process.

The invention discloses a phosphorus-doped carbon nitride / carbon nitride homojunction photocatalyst and its preparation method and application. The photocatalyst uses carbon nitride as a carrier, and the carbon nitride is modified with phosphorus-doped nitride. carbon. The preparation method includes: mixing phosphorus-doped carbon nitride and melamine, and calcining the resulting mixture precursor to obtain a phosphorus-doped carbon nitride / carbon nitride homo-heterojunction photocatalyst. The photocatalyst of the present invention has the advantages of being green and environmentally friendly, completely free of metal doping, strong visible light absorption ability, increased specific surface area, fast photogenerated charge separation rate, high photocatalytic activity, stable chemical properties, corrosion resistance, etc. Its preparation method has the following advantages: The process is simple, easy to control, the raw materials are easily available, the cost is low, and it is suitable for continuous large-scale batch production. The photocatalyst of the present invention can be used to degrade antibiotic wastewater, has the advantages of stable photocatalytic performance, strong corrosion resistance, and high degradation efficiency, and has good practical application prospects.

The invention discloses a separation process of petroleum associated gas and belongs to the technical field of separation of associated gas. The separation process includes the steps of pretreatment,gas-liquid separation, CO2 separation, and gas recycling. The CO2 separation step employs a composite membrane to separate carbon dioxide; the composite membrane is of three-layer structure includinga polysulfone membrane layer as a surface layer, a gel filter layer as an intermediate layer, and a nonwoven layer as a bottom layer. The separation process of petroleum associated gas disclosed herein is suitable for separating carbon dioxide and methane. The composite membrane for the membrane separation step has high porosity and selectivity, as well as high permeation flux and deformation resistance; the separation process disclosed herein has good separation effect, employs compact equipment and is environmentally friendly.

The invention relates to the technical field of photocatalytic materials, in particular to a preparation method of a 2D / 1D heterojunction photocatalyst and an application of the 2D / 1D heterojunction photocatalyst in antibiosis, and the preparation method of the 2D / 1D heterojunction photocatalyst comprises the following steps: synthesizing a 1D porous In2O3 nanotube as a support semiconductor by a simple calcination method; and performing in-situ growth of a 2D ultrathin ZnIn2S4 nanosheet on the surface of the 1D porous In2O3 nanotube through a low-temperature oil bath process so as to construct the efficient visible light driven 2D ZnIn2S4 / 1D In2O3 heterojunction photocatalyst which is used for inactivating pathogenic microorganisms. The method has the advantages that the method is simple and convenient, the cost is low, and the material prepared by the method has the advantages of accelerating the separation and migration rate of photon-generated carriers and the generation of active species such as superoxide radicals, and has excellent photocatalytic antibacterial activity.

The invention discloses a preparing method of a multifunctional oil-water separating material. The preparing method includes the following steps of S1, preprocessing a copper net to remove impuritieson the surface; S2, soaking the preprocessed copper net in a chloroauric acid solution for 1-2 hours to obtain a copper net loaded with Au / CuCl particles; S3, soaking the copper net obtained in the step S2 in a silver salt solution for 1-2 hours to obtain a copper net loaded with Au / AgCl particles on the surface; S4, modifying the surface of the copper net obtained in the step S3 through the PFDTto obtain the multifunctional oil-water separating material. The invention further discloses the multifunctional oil-water separating material prepared through the method and application of the material. The prepared multifunctional oil-water separating material can separate an oil-water mixture, can also detect low-concentration pollutants in oil-water mixed liquid and can effectively conduct photolysis on the pollutants.

The invention discloses a preparation method of a visible light response high-efficiency composite photocatalyst g-C3N4 / alpha-FeOOH / Ag, which comprises the following steps of: 1) mechanical grinding:uniformly mixing g-C3N4 nanoparticles with alpha-FeOOH nanoparticles, grinding to fully mix the mixture to form a g-C3N4 / alpha-FeOOH composite solid material; 2) carrying out illumination compounding:pouring the g-C3N4 / alpha-FeOOH composite solid material obtained in step 1) into deionized water, adding AgNO3 powder, stirring and reacting for 90-120min under the condition of illumination, and performing solid-liquid separation to obtain a solid phase; 3) drying and grinding: drying and grinding the solid phase obtained in step 2) to obtain a g-C3N4 / alpha-FeOOH / Ag composite material. The preparation method not only widens the absorption of visible light, but also can effectively inhibit charge recombination, has higher photocatalytic activity and is beneficial to the degradation of organicmatters.

The invention provides suction type pneumatic conveying equipment. The suction type pneumatic conveying equipment comprises a storage cylinder, a conveying pipe, a gas pipe, a fan and a separating cylinder; the separating cylinder is embedded and welded in the top of the storage cylinder; the conveying pipe is embedded and welded in one side of the separating cylinder; the gas pipe is embedded andwelded in the other side of the conveying pipe; one end of the gas pipe is embedded and welded in the fan; a discharge pipe is embedded and welded in the bottom of the storage cylinder; the bottom ofthe discharge pipe is sleeved with a screw cap in a threaded mode; one side of the conveying pipe is welded to the storage cylinder through a support rod; a carrier plate is welded to the top of theseparating cylinder; and a motor is welded to the top of the carrier plate. A separating pipe is driven by a disc to rotate at a high speed, in the movement process of the separating pipe, due to rotation of the separating pipe, the separating pipe can lay down materials in the separating pipe before the materials fall off from the separating pipe, so that the materials fall into the separating cylinder, the materials are completely separated from airflow, and thus the materials can be completely separated from airflow just through one time of separating.

The invention discloses an ultrasonic leaching-extracting separating method of enriched rare earth ore, which is characterized by the following: leaching enriched yttrium rare earth ore, leached liquid and extract in the same container; extracting group by group; separating; obtaining yttrium hydrochlorate or enriched sulfate material as residual phase and non-yttrium rare earth element hydrochlorate or enriched sulfate material as extracting phase.

The invention belongs to the technical field of demulsifiers, and particularly relates to a composite demulsifier and a preparation process thereof. The composite demulsifier disclosed by the invention is prepared from the following components in percentage by weight: a nano-silicon dioxide modified polyether demulsifying agent, a toluene diisocyanate modified polyether demulsifying agent, trimethylolpropane polyoxypropylene polyoxyethylene ether, ionic liquid, sulfonated polyacrylamide, diethylene glycol monobutyl ether and water, wherein the ionic liquid is a mixture of 1-butyl-3-methylimidazole hexafluorophosphate and bromo-1-octyl-3-methylimidazole. According to the composite demulsifier, three demulsifying agents including the nano-silica modified polyether demulsifying agent, the toluene diisocyanate modified polyether demulsifying agent and the trimethylolpropane polyoxypropylene polyoxyethylene ether are used as main demulsifying agents, the ionic liquid is used for reducing the strength of an interfacial film, a flocculating agent is used for changing oil droplets from a dispersed state into a coalescent state, and the demulsifying agents enable the demulsifying agents in a coalescent state to form a complete oil phase, so oil-water separation is realized.

The invention discloses a hollow tubular carbon nitride photocatalyst and its preparation method and application. The hollow tubular carbon nitride photocatalyst is prepared by using urea and melamine as raw materials through hydrothermal heating and calcination. The molar ratio of urea and melamine is The ratio is 1 to 5:1. The hollow tubular carbon nitride photocatalyst of the present invention has the advantages of large specific surface area, large number of holes, fast separation and migration rate of photogenerated carriers, strong light absorption ability, and high photocatalytic activity. It is a novel morphology structure and excellent photocatalytic performance. The preparation method of the new visible light catalyst has the advantages of simple process, easy operation, low cost, and no secondary pollution. It is suitable for large-scale preparation and is conducive to industrial application. The photocatalyst of the present invention can degrade organic pollutants, can achieve efficient removal of organic pollutants, has the advantages of simple process, convenient operation, low cost, high treatment efficiency, good removal effect, etc., and has good application value and application prospects.

The invention discloses an ultrasonic leaching-extracting separating method of low-yttrium middle-heavy typed rare earth ore, which is characterized by the following: adopting low-yttrium middle-heavy typed rare earth ore as raw material and alcaine solution as leaching liquid; blending P507 or P204 and kerosene as extracting liquid; leaching low-yttrium middle-heavy typed rare earth ore to extract and separate at 5-60 deg.c; setting the ultrasonic frequency at 19-80kHz and ultrasonic strength at 0.2-20.0W / cm2; obtaining yttrium rare earth element hydrochlorate enriched material as extracting phase and cerium group rare earth hydrochlorate enriched material as residual phases.

The invention relates to a separating device of hydrochloric acid and polymerized oil in production of pinacolone. The separating device is characterized by comprising a separating kettle, a hydrochloric acid recycling kettle and a polymerized oil recycling kettle; the hydrochloric acid recycling kettle and the polymerized oil recycling kettle are arranged at the two sides of the separating kettlerespectively. According to the fact that the densities of polymerized oil and hydrochloric acid are different and the density of hydrochloric acid is larger than that of the polymerized oil, mixed hydrochloric acid and polymerized oil stand in the separating kettle to be layered, by arranging a separator at a liquid inlet of the separating kettle, hydrochloric acid and the polymerized oil are quickly separated preliminarily, and hydrochloric acid and the polymerized oil separated from the separator enter the separating kettle to stand and be separated for the second time; through preliminaryseparation by the adoption of the separator and secondary separation through standing and layering, the separating effect of hydrochloric acid and the polymerized oil is better, and the separating speed is higher.

The invention provides an aperture-controllable CS / PLA oil-water separating nanometer fiber film and a preparation method thereof, and the preparation comprises the steps of dissolving PLA in a solvent to obtain a PLA solution; dissolving CS in a solvent to obtain a CS solution; mixing the PLA solution and the CS solution and adding waterless ethanol and stirring for 3-5 h to obtain a uniform sol spinning liquid. The aperture-controllable CS / PLA oil-water separating nanometer fiber film can be obtained by static spinning, peeling and drying. The CS / PLA oil-water separating nanometer fiber film is obtained by static spinning; and the aperture among fibers is controlled by adjusting mesh number of a receiving net. Therefore, the process is simple, the cost is low; the process is green and has no pollution, and the film can be conveniently applied. The prepared nanometer fiber film has a relatively high oil separation efficiency; the separating speed is fast; the separating effect is good; the film can be repeatedly used; the film has a good stability; a stable separating efficiency to oil-and-water mixture of different pH values can be maintained.

The invention discloses a method for treating organic pollutants and photocatalytic sterilization by using modified carbon quantum dots to load a hollow tubular carbon nitride photocatalyst. The method includes the following steps: loading the modified carbon quantum dots with a hollow tubular carbon nitride photocatalyst. Mix it with organic pollutant wastewater or bacterial solution for photocatalytic treatment to complete the treatment of organic pollutants or bacteria. The modified carbon quantum dot-loaded hollow tubular carbon nitride photocatalyst uses hollow tubular carbon nitride as a carrier, on which Loaded with modified carbon quantum dots, the hollow tubular carbon nitride is prepared by hydrothermal treatment and calcination using urea and melamine with a molar ratio of 1 to 5:1 as raw materials. The method for treating organic pollutants and photocatalytic sterilization of the present invention has the advantages of simple process, convenient operation, simple equipment, low cost, high processing efficiency / high photocatalytic efficiency, good removal effect / good sterilization effect, clean and pollution-free, etc., and has high application value and commercial value.

The invention relates to the field of material technology. The invention discloses a CoFe 2 O 4 / g‑C 3 N 4 Magnetic nanomaterials and preparation methods thereof. The method of the invention includes preparing g‑C 3 N 4 Nanosheets, and then g‑C 3 N 4 The nanosheets were dispersed in ethylene glycol and then FeCl was added 3 ·6H 2 O and CoCl 2 ·4H 2 O is completely dissolved, and finally sodium acetate is added, stirred and then calcined in an oven to finally obtain black precipitated CoFe. 2 O 4 / g‑C 3 N 4 . CoFe of the present invention 2 O 4 / g‑C 3 N 4 Magnetic nanomaterials due to CoFe 2 O 4 Nanoparticles are evenly distributed in g‑C 3 N 4 on the nanosheet, thus blocking CoFe 2 O 4 Agglomeration occurs between nanoparticles, providing more active sites to improve their catalytic activity. In addition, due to CoFe 2 O 4 Nanoparticles themselves are magnetic, and the orderly distribution between particles lies in g‑C 3 N 4 A larger planar nanomaterial is formed on the nanosheet, which is smaller than CoFe alone. 2 O 4 Nanoparticles can separate faster under the influence of a magnetic field.

The invention discloses a rod-shaped Cu x O photocatalytic material and its preparation method and application, the method is as follows: (1) adding anhydrous copper sulfate, cetyltrimethylammonium bromide and water into a beaker, stirring evenly to obtain a mixed solution; (2) Add the egg membrane into the beaker, stir evenly to obtain a suspension; (3) transfer the suspension to the eggshell and place it in a beaker filled with sodium hydroxide solution, and then carry out an oil bath reaction; (4) transfer the obtained The solution is centrifuged, the product is collected, washed, and dried to obtain a sample; (5) The sample is calcined to obtain a copper-based photocatalytic material for visible light photocatalytic antibacterial. The present invention uses egg shells as a reactor to prepare Cu under mild conditions. x O rod-shaped photocatalytic material, the rod-shaped structure makes the obtained material have a larger specific surface area, and at the same time exposes more surface active sites, effectively improving its visible light photocatalytic antibacterial activity.

The invention discloses a molybdenum carbide modified tubular carbon nitride photocatalytic material and a preparation method and application thereof. The molybdenum carbide modified tubular carbon nitride photocatalytic material comprises molybdenum carbide and tubular carbon nitride, wherein the surface of the tubular carbon nitride is modified with the molybdenum carbide. The preparation methodcomprises the steps: suspending the tubular carbon nitride in methanol, so as to obtain a suspension; dispersing the molybdenum carbide in the suspension, carrying out intensive mixing, and carryingout drying, thereby obtaining the molybdenum carbide modified tubular carbon nitride photocatalytic material. According to the molybdenum carbide modified tubular carbon nitride photocatalytic material disclosed by the invention, an energy band structure of the carbon nitride is improved to form molybdenum carbide / carbon nitride heterojunction, so that the effective separation of photoproduction electron-hole pairs is achieved, the utilization efficiency of photoproduction electron-holes is increased, and the effect of photocatalytic degradation is promoted; the molybdenum carbide modified tubular carbon nitride photocatalytic material can be applied to degradation of antibiotics or dyes in wastewater.

The invention discloses a multifunctional demulsifier as well as a preparation method and an application method thereof. The demulsifier comprises a carrier, a natural polysaccharide compound coated outside the carrier and cyclodextrin grafted on the natural polysaccharide compound through a cross-linking agent, the carrier is a composite compound formed by sepiolite, ferroferric oxide and zinc oxide; in the carrier, the mass ratio of the sepiolite to the ferroferric oxide to the zinc oxide is 10: (5-27): (0.6-1.8); the particle size, measured by a laser particle analyzer, of the carrier is 2-18 [mu] m; the mass ratio of the carrier to the natural polysaccharide compound to the cyclodextrin is (17-60): 2: (0.5-2). The demulsifier prepared by the invention has multiple functions of high demulsification speed, magnetic response, adsorption of organic pollutants such as dyes, antibiosis and the like, and is a green and environment-friendly product.