283 results about "Catalytic membrane" patented technology

The invention discloses a CoFeCuMn LDH nanosheet, a confinement catalytic membrane and a preparation method of the CoFeCuMn LDH nanosheet. The preparation method of the CoFeCuMn LDH nanosheet comprises the steps that A1, cobalt salt, ferric salt, copper salt and manganese salt are dissolved in pure water according to a preset proportion to prepare a first solution, sodium hydroxide is dissolved in pure water to prepare a second solution, and sodium carbonate is dissolved in pure water to prepare a third solution; a2, adding the first solution and the second solution into the third solution, and stirring to obtain a mixed solution; a3, carrying out hydrothermal reaction on the mixed solution; a4, centrifugally washing the product obtained in the step A3 to obtain a precipitate; and A5, the sediment is dried, and the CoFeCuMn LDH nanosheet is obtained. According to the CoFeCuMn LDH nanosheet, the confinement catalytic membrane and the preparation methods of the CoFeCuMn LDH nanosheet and the confinement catalytic membrane, the degradation efficiency and the degradation rate of new pollutants are remarkably improved.

The invention relates to the technical field of industrial wastewater deep purification, and discloses an industrial wastewater deep purification system based on nano catalytic membrane separation, which comprises a pretreatment module, a catalytic degradation module, a membrane separation module, an intelligent control module and a regeneration maintenance module which are sequentially connected according to a treatment flow, the pretreatment module adjusts the water quality of inlet water to a range suitable for subsequent treatment through pH adjustment and suspended matter interception, that is, the pH is 2-11, and the turbidity is less than or equal to 50NTU; the catalytic degradation module is used for decomposing organic pollutants and mineralizing refractory substances under the excitation of ultraviolet / visible light by utilizing the photocatalytic characteristic of a nano catalytic membrane. The TiO2 / WO3 heterojunction nano catalytic membrane is adopted, so that deep oxidation of refractory pollutants such as phenol and sulfonamide antibiotics is realized, finally, the COD removal rate of 98.7% is achieved, and compared with a traditional photocatalytic process, the energy consumption is reduced by 54%.

The invention relates to preparation of a multi-channel Ni / CM ceramic catalytic membrane, and belongs to the technical field of membrane catalysis. According to the preparation method, Ni-BTC grows in situ on the surface and in the pore channels of the multi-channel ceramic membrane through a hydrothermal method and is calcined in a reducing atmosphere to prepare the catalytic membrane, and the preparation process is simple. The prepared catalytic membrane has high catalytic activity and stability, meanwhile, separation of a catalyst and a product is avoided, and recovery and reutilization of the catalyst are facilitated.

The invention relates to a preparation method of a molecular sieve type SCR (Selective Catalytic Reduction) catalytic membrane, which comprises the following steps: taking an alpha-Al2O3 ceramic membrane tube as a carrier, carrying out alkali washing and acid washing on the ceramic membrane tube, and then drying to remove impurities in the ceramic membrane tube. Meanwhile, preparing a membrane preparation solution, firstly mixing a molecular sieve with a metal compound with an SCR effect, adding deionized water to prepare a mixed solution with the catalytic metal content of 0.1-0.3 mol / L, adjusting the pH value, heating and ultrasonically carrying out an ion exchange reaction, and adding a binder to prepare the membrane preparation solution; and loading the molecular sieve catalyst to the inner side of the alpha-Al2O3 ceramic membrane tube in a dip coating manner. And drying and roasting the membrane tube, and carrying out surface hydrophobic modification on the outer side of the ceramic membrane tube to obtain the molecular sieve SCR catalytic membrane. The efficient molecular sieve SCR catalytic membrane is obtained through one-time roasting, waste gas water and dust removal and SCR catalysis can be achieved at the same time, the conversion rate of NOx in the low-temperature environment is high, and the whole process is safe and environmentally friendly.

The invention discloses a method for producing formic acid by reducing carbon dioxide through a hydrogen-driven hollow fiber catalytic membrane reactor, and relates to the technical field of carbon dioxide resource utilization. In order to solve the problems of low formic acid product selectivity, low CO2 conversion efficiency and high cost in the prior art, hydrogen is used as the only energy source, and a hollow fiber non-porous membrane is utilized to realize bubble-free efficient mass transfer of H2 to form a compact hydrogen-rich layer on the surface; the nano-metal particle catalyst loaded on the surface of the membrane synergistically activates hydrogen at a gas-liquid-solid three-phase interface to generate active hydrogen atoms, and CO2 transferred in a dissolved state or a gas phase is subjected to directional catalytic reduction to form formic acid with high selectivity. The method is operated at normal temperature and normal pressure, so that the H2 utilization efficiency and the CO2 mass transfer efficiency are remarkably improved, and the byproduct separation cost and the operation energy consumption are effectively reduced; the produced formic acid can be used as an important chemical raw material and intermediate, an excellent liquid hydrogen storage carrier, a formic acid fuel cell fuel and a microbial carbon source, and has wide application value.

The invention discloses a preparation method of a catalytic membrane for organic wastewater treatment, which comprises the following steps: dissolving polyvinylidene fluoride (PVDF), a pore-forming agent and plant polyphenol in an organic solvent, and stirring to obtain a membrane casting solution, wherein the PVDF accounts for 12-20%, the pore-forming agent accounts for 1-8%, and the plant polyphenol accounts for 1-6%; standing and defoaming the membrane casting solution, blade-coating the membrane casting solution on a support body to form a membrane, and performing phase inversion in a water bath to obtain the plant polyphenol modified PVDF membrane; and immersing the membrane in a 3-10 mmol / L metal chloride aqueous solution, and reacting at 40-80 DEG C for 6-48 hours, so that metal ions and polyphenol are coordinated and crosslinked, and a metal-polyphenol network layer is formed on the surface of the membrane and the inner walls of membrane pores, thereby obtaining the catalytic membrane. The catalytic membrane can activate peroxymonosulfate (PMS) and synergistically degrade organic pollutants in water under a differential pressure filtration working condition, active sites are anchored stably, metal precipitation is reduced, and flux and catalytic efficiency are both considered.

This invention discloses an electrically controlled enrichment catalytic membrane, its preparation method, and its application in water treatment, belonging to the field of environmental organic pollution remediation technology. The electrically controlled enrichment catalytic membrane comprises a substrate layer and a copolymer coating layer with reversible electro-oxidation-reduction properties. The substrate layer is a titanium suboxide conductive ceramic membrane with a pore size of less than 1 micrometer, and the copolymer coating layer is an organic blend polymer TMA containing nitro radical functional groups. x -co-TMPMA (1‑x) Where x% represents the degree of oxidation. This invention also provides an application of the above-mentioned electrically controlled enrichment catalytic membrane in water treatment for the removal of organic pollutants. The electrically controlled enrichment catalytic membrane is used as a filter membrane in an electrochemical water treatment device. Two filter membranes are connected to the two poles of an AC power system, with the positive and negative poles reversing during a cycle. The polluted solution is controlled to flow sequentially through the two filter membranes. By adjusting the positive and negative bias parameters on the filter membranes, hydrophobic organic pollutants in the polluted solution are adsorbed and oxidized for removal. This method is energy-saving, environmentally friendly, and easy to operate.

The invention discloses a preparation method and application of a catalytic membrane based on monatomic iron-manganese oxide, and belongs to the field of catalytic membrane water treatment. The invention aims to solve the problems that a chromium fog inhibitor F-53B in the existing chromium plating wastewater is difficult to degrade, and the degradation rate is greatly reduced when residual PAM and F-53B coexist. The method comprises the following steps: 1, preparing a casting solution; 2, dripping the membrane casting solution into pores of a hollow ceramic membrane substrate and drying; 3, preparing a potassium ferricyanide aqueous phase solution; 4, preparing a manganese acetylacetonate oil phase solution; and 5, dipping the dispensed ceramic membrane substrate in a potassium ferricyanide water-phase solution, dropwise adding a manganese acetylacetonate oil-phase solution into pores of the ceramic membrane substrate subjected to water-phase treatment, and finally calcining. The application comprises the following steps: degrading chlorinated polyfluoroalkyl ether sulfonate; or in the presence of polyacrylamide, the catalyst is used for degrading the chlorinated polyfluoroalkyl ether sulfonate. The preparation method is used for preparation and application of the catalytic membrane based on the monatomic iron-manganese oxide.

The invention relates to the technical field of catalysis, in particular to a green preparation process for synthesizing 4 '-chloro-2-aminobiphenyl through a membrane method.A palladium-based catalytic membrane is prepared through an impregnation method, by means of the multi-pore-channel advantage of a ceramic membrane, active components can be well distributed on the surface and in the membrane, contact of a reaction substrate and active sites is promoted, and the catalytic activity of 4'-chloro-2-aminobiphenyl is improved. The reaction effect is enhanced, the reaction efficiency is improved, the preparation process is simple, the preparation environment is mild, and large-scale production can be realized; meanwhile, the 4 '-chloro-2-aminobiphenyl is prepared by adopting a method for carrying out Suzuki-Miyaura coupling reaction by adopting the catalytic membrane, tedious steps in the traditional industry are omitted, compared with a traditional heterogeneous catalyst, the trouble of recovery is avoided, the cost is saved, the harm to the environment is greatly reduced, and compared with the prior art, the 4'-chloro-2-aminobiphenyl has a wide application prospect.

The invention belongs to the technical field of advanced oxidation and membrane separation, and particularly relates to a PES / CP / CoCo-PBA composite catalytic membrane and a preparation method and application thereof.The PES / CP / CoCo-PBA composite catalytic membrane comprises a PES basement membrane and a catalytic activity layer combined on the PES basement membrane in situ through a phase inversion method, the catalytic activity layer is made of a CP / CoCo-PBA composite material, and the preparation method of the composite catalytic membrane comprises the steps that the PES basement membrane and the catalytic activity layer are combined in situ through a phase inversion method; the CP / CoCo-PBA composite material is formed by enabling catalytic particles CoCo-PBA to grow on a carbon material in situ through a hydrothermal method. The PES / CP / CoCo-PBA composite catalytic membrane provided by the invention has excellent catalytic degradation performance and good stability, not only has conductivity to realize the effect of electrochemically activating PMS, but also can keep higher mechanical strength and pollution resistance to meet the requirements of long-term operation and large-scale industrial application.

The invention relates to an efficient flocculation, ozone catalysis and membrane distillation combined process which is suitable for treating high-salinity wastewater, especially desulfurization wastewater of a coal-fired power plant and coal chemical wastewater. According to the technology, efficient flocculation, ozone catalysis and membrane distillation technologies are ingeniously fused, a specially-made chitosan-based flocculant is added in the flocculation stage, and suspended solids and heavy metal ions in wastewater are effectively removed by means of the excellent adsorption and flocculation efficiency of the specially-made chitosan-based flocculant; in the ozone catalysis stage, an ozone decomposition process is accelerated by adding a self-developed ternary composite catalyst, so that organic pollutants are deeply purified; in the membrane distillation stage, a self-made antifouling and moisture-resistant composite membrane is used for efficient desalination and concentration, and finally efficient purification and recycling of the high-salinity wastewater are achieved. The process can significantly improve the wastewater treatment effect, reduce the concentration of salt and harmful substances in the wastewater, also reduce the operation cost, and is suitable for large-scale industrial wastewater treatment.

The invention discloses a porous catalytic membrane, a membrane electrode assembly and a water electrolysis device, and relates to the technical field of new energy. The porous catalytic membrane provided by the invention comprises a porous polymeric membrane formed by interweaving randomly arranged nanofibers, and a catalyst covering the surfaces of the nanofibers, the porous polymeric membrane has a self-supporting structure and a large specific surface area, and provides a large number of loading sites for the catalyst; the catalyst can be directly anchored on the nanofiber of the porous polymeric membrane through a physical or chemical preparation method, uniform dispersion is realized, and no ionomer is needed for coating, so that the problems of high cost and performance reduction caused by use of the ionomer are avoided, the exposure degree of catalytic active sites is remarkably improved, and the catalytic activity of the catalyst is improved. Therefore, the utilization efficiency of the catalyst is improved and the dosage of the noble metal catalyst can be reduced; in addition, the porous catalytic membrane and the ion exchange membrane have excellent interface contact characteristics, and integrated combination of the porous catalytic membrane and the ion exchange membrane is facilitated.

The invention relates to the technical field of composite materials, in particular to a graphite carbon nitride catalytic membrane material and a preparation method and application thereof. The preparation method comprises the following steps: mixing melamine, a halogen source and water, drying, and carrying out heat treatment to obtain the halogen intercalation carbon nitride composite material; mixing the halogen intercalation carbon nitride composite material dispersion liquid with a metal salt solution, then adjusting the pH value to be alkaline, carrying out an in-situ coprecipitation reaction to obtain a metal oxide / halogen intercalation carbon nitride heterojunction, and carrying out vacuum calcination on the metal oxide / halogen intercalation carbon nitride heterojunction to obtain metal oxide / halogen intercalation carbon nitride heterojunction composite powder; mixing the metal oxide / halogen intercalation carbon nitride heterojunction composite powder, a polymer carrier and N, N-dimethylformamide to obtain a spinning solution, and performing electrostatic spinning to obtain a nascent fiber membrane; and calcining the nascent fiber membrane to obtain the graphite carbon nitride catalytic membrane material. The preparation method is high in operability, and the prepared material has the characteristics of stable structure and high catalytic efficiency.

The invention discloses a two-dimensional Co-Fe Prussian blue analogue catalytic membrane as well as a preparation method and application thereof, and belongs to the technical field of catalytic membrane degradation treatment of environmental organic pollutants. The two-dimensional Co Fe PBA nanosheets are fixed to the hydrophilic polytetrafluoroethylene membrane modified by polydopamine in a vacuum filtration mode, the stability of the material is improved, the leaching rate of metal ions of the Co Fe PBA nanosheets is reduced, and the two-dimensional flaky Prussian blue analogue catalytic membrane is promoted to activate PAA to catalyze organic pollutants. The prepared two-dimensional flaky Prussian blue analogue catalytic membrane can treat different organic pollutants, is high in structure and performance stability and wide in pH application range, has high tolerance to complex water bodies, can be expected to be applied to continuous and efficient treatment of actual water bodies, and has wide application prospects. And new opinions and possibilities are provided for the treatment of environmental pollutants.

The invention provides a titanium oxide catalytic membrane as well as a preparation method and application thereof, and the method comprises the following steps: dissolving pore-forming agent powder in ethanol, stirring into a uniform solution, adding an acetic acid solution, a titanium precursor solution and ferric salt powder, and vigorously stirring until the solution is clear and transparent to obtain an organic solvent; washing the surface of the ceramic membrane with absolute ethyl alcohol and deionized water, and drying for later use; the ceramic membrane is soaked in an organic solvent for 0-6 h and then transferred to a crucible, the crucible is placed in a muffle furnace, the temperature is increased to 300-800 DEG C firstly, first annealing is conducted for 1-3 h, the temperature is continuously increased to 800-1000 DEG C, second annealing is conducted for 0.5-2 h, and the temperature increasing speed is 5 DEG C / min; and taking out the ceramic membrane in the muffle furnace, washing redundant titanium dioxide powder on the surface with deionized water, and completely drying in a drying oven at 60 DEG C to prepare the titanium oxide catalytic membrane. The titanium oxide catalytic membrane prepared by the invention has the advantages of efficient ozone catalytic performance, improvement of ozone utilization rate, stable performance and the like.

The invention discloses a preparation method and application of an open carbon nanotube composite film of two-dimensional graphene oxide intercalation one-dimensional packaged cobalt ferrite, and belongs to the technical field of preparation of two-dimensional material films. The invention aims to solve the problems that the catalytic effect of the existing catalytic membrane is easily interfered by natural organic matters and the selectivity on target pollutants is poor. The method comprises the following steps of: 1, preparing an open carbon nano tube for packaging cobalt ferrite; and 2, preparing the composite membrane by intercalating the two-dimensional graphene oxide. The method is used for removing organic pollutants in water. The preparation method is used for preparation and application of the open carbon nanotube composite film of the two-dimensional graphene oxide intercalation and one-dimensional packaging cobalt ferrite.

The invention discloses a preparation and use method of a silicon carbide catalytic membrane for treating refractory organic wastewater, and belongs to the technical field of wastewater treatment. The preparation method comprises the following steps: reacting a high-performance silicon carbide ceramic membrane prepared by taking silicon manganese slag and silicon carbide powder as raw materials with a hydrotalcite precursor, and calcining to form the hydrotalcite-loaded silicon carbide catalytic membrane. The preparation process is simple in technology and short in period, the high-performance silicon carbide ceramic membrane is obtained through optimization of a grain composition method, meanwhile, the hydrotalcite-loaded silicon carbide ceramic membrane has the characteristic of catalytic oxidation, ozone micro-nano bubbles are coupled, and refractory organic pollutants in water can be effectively removed.

The invention relates to a porphyrin iron-based biomimetic enzyme catalytic membrane for water treatment as well as preparation and application thereof, and belongs to the technical field of catalytic membranes. The porphyrin iron-based biomimetic enzyme catalytic membrane comprises a microfiltration membrane basement membrane and a porphyrin iron-based biomimetic enzyme catalyst loaded on the surface of the basement membrane in a chemical crosslinking mode, and the porphyrin iron-based biomimetic enzyme catalyst contains a catalytic activity center structure of 'Fe-N' coordination. The porphyrin iron-based biomimetic enzyme prepared by the invention is similar to a catalytic active center structure of natural peroxidase, has high affinity with hydrogen peroxide, and can greatly improve the utilization rate of hydrogen peroxide and the steady-state concentration of reactive oxygen free radicals; the constructed bionic enzyme-membrane reactor integrates dual functions of membrane separation and enzyme catalysis, realizes efficient combination of mass transfer and reaction, and greatly improves the removal performance of new pollutants in water.

The invention relates to the technical field of catalytic membrane materials, and discloses a recyclable piezoelectric photocatalytic membrane material for uranium extraction and a preparation method and application thereof.The preparation method comprises the steps that S1, nanosheets are prepared, specifically, urea is prepared into the nanosheets, then the nanosheets and KSCN powder are ground and heated, and after cooling, washing is conducted to obtain cyanated C3N4 nanosheets; and S2, preparing a composite fiber membrane, namely ultrasonically dispersing cyanated C3N4 nanosheets with different masses in DMF (Dimethyl Formamide), then adding PVDF (Polyvinylidene Fluoride) and PVP (Polyvinyl Pyrrolidone), stirring to prepare a spinning solution, sucking and fixing the spinning solution on an electrostatic spinning device by using an injector, and spinning to prepare the composite fiber membrane doped with cyanated C3N4 with different proportions. The required recyclable piezoelectric photocatalytic membrane material prepared by spinning is high in uranium extraction efficiency and has a good antibacterial effect and an excellent application prospect, and in preparation of a catalytic material, a piezoelectric-photocatalytic technology is combined with a recyclable technology and antibacterial performance, so that the performance of the catalytic material is comprehensively improved.

The invention relates to a monatomic nanofiber catalytic membrane with gradient distribution of catalysts as well as a preparation method and application of the monatomic nanofiber catalytic membrane, and belongs to the technical field of membrane separation-catalytic coupling and sewage treatment. The technical problems that in the prior art, a catalytic membrane cannot effectively treat high-salinity wastewater, and the utilization rate of a catalyst and active oxygen is low are solved. The monatomic nanofiber catalytic membrane comprises a nanofiber base membrane and a metal-C3N4 monatomic catalyst which is distributed on the surface of the nanofiber base membrane in a gradient manner. The preparation method comprises the following steps: firstly, synthesizing a metal-C3N4 monatomic catalyst; then preparing spinning solutions of metal-C3N4 monatomic catalysts with different concentrations; finally, gradient spinning, hole forming and drying are conducted, the monatomic nanofiber catalytic membrane is obtained, stable loading of a monatomic catalyst in the catalytic membrane is achieved, gradient distribution of the singlet oxygen concentration of a hole channel is achieved, and the catalytic degradation efficiency of the nanofiber catalytic membrane on organic pollutant molecules is greatly improved.

A supported carbon molecular sieve membrane having aluminum atomically distributed in it, wherein: the aluminum is present in an amount of equal to or lower than 15 wt. % of the carbon molecular sieve membrane; the membrane comprises a pore size distribution in which at least 70% of the pores have a pore size from 0.25 to 0.7 nm; and which is obtainable by dip-coating a support with a solution comprising a phenolic-resin and aluminum ions, followed by carbonization. The carbon content of the carbon molecular sieve membrane is from 75 wt. % to 95 wt. %, the oxygen content is from 2.5 wt. % to 8 wt. %, and the hydrogen content is from 1.5 wt. % to 6% wt. %. These CMSMs are useful for gas separation, H2 recovery from natural gas grids, H2 production from biomass, solvent dehydration, obtaining oxygen-enriched air, or dehydrogenation of methylcyclohexane, and as a catalytic membrane reactor or part of a catalytic membrane reactor.

The invention discloses a preparation method of an inorganic piezoelectric catalytic membrane and application of the inorganic piezoelectric catalytic membrane in water treatment by coupling an advanced oxidation technology, and belongs to the technical field of environmental functional materials and water treatment. Technical breakthrough is achieved through a synergistic mechanism of an inorganic piezoelectric material and an advanced oxidation technology, the inorganic piezoelectric catalytic membrane is prepared by taking the piezoelectric material as a core piezoelectric component through ball-milling mixing, dry-pressing forming and high-temperature calcination processes, a multi-stage pore channel structure (the pore diameter is 50-100 nm) is formed, and a piezoelectric electric field larger than or equal to 0.5 V is generated under dynamic mechanical energy; the electric field is used for directionally activating the oxidant to generate high-selectivity singlet oxygen (1O2) by adjusting an electron structure on the surface of the catalyst, and the selectivity of the singlet oxygen reaches 95% or above; the mass transfer efficiency is remarkably improved through the synergistic effect of the membrane confinement effect and the piezoelectric micro-current, efficient removal of refractory pollutants such as sulfamethoxazole and bisphenol A is achieved (the degradation rate within 30 minutes is larger than or equal to 99%), and the self-cleaning function is achieved (the flux recovery rate is larger than or equal to 98%).

The present invention relates to the technical field of water treatment, and discloses a self-driven water purification treatment device. The device comprises a triboelectric nanogenerator component and a catalytic adsorption component arranged in a water flow. The triboelectric nanogenerator component comprises a pulse current output interface, a roller, a conductive component, a rotating shaft, a friction component, a blade and a triboelectric nanogenerator component. The roller rotates around the rotating shaft, the friction component and the triboelectric nanogenerator component generate electricity by friction, the blade structure improves the energy conversion efficiency, and the conductive component ensures a stable electrical connection. The catalytic adsorption component comprises a reaction container, an electrode catalytic membrane and a potassium persulfate composite salt oxidant, the electrode catalytic membrane comprises a pole piece, an active catalytic layer and an input electrode, and the pulse current output interface is connected to the input electrode. The present invention can catalytically oxidize water pollutants without external power supply access.

The invention discloses a method for preparing dimethyl carbonate by catalyzing direct carbonylation of methanol by adopting a molecular sieve membrane reactor. Comprising a porous carrier tube and a hydrophilic molecular sieve membrane loaded on the surface of the porous carrier tube, the molecular sieve membrane tube is fixed in a high-pressure reaction kettle in a dead-end mode, the bottom end of the molecular sieve membrane tube is sealed and is spaced from the inner wall of the bottom of the high-pressure reaction kettle, the permeation side of the molecular sieve membrane tube is communicated with the outer side of the reaction kettle, normal pressure is kept, and the reaction kettle is sealed; constructing a kettle type catalytic membrane reactor; (2) adding methanol and a catalyst into a high-pressure reaction kettle, introducing carbon dioxide with a certain pressure, heating the high-pressure reaction kettle, starting a stirring reaction, and removing byproduct water through the pressure difference between two sides of a molecular sieve membrane tube in the reaction process; the molecular sieve membrane is a ZSM-5 molecular sieve membrane or a NaA molecular sieve membrane. Compared with a conventional dimethyl carbonate production method, the method has the advantages that the reaction conversion rate is greatly increased, the production process is greener, and the product separation cost is greatly reduced.

The invention discloses a ceramic catalytic membrane as well as a preparation method and application thereof in regeneration of a CO2-rich alcohol amine solution, the ceramic catalytic membrane comprises a ceramic membrane, and sulfated zirconium oxide is loaded on the surface of the ceramic membrane, in membrane pore channels and in a supporting layer. The preparation method of the ceramic catalytic membrane comprises the following steps: soaking a ceramic membrane in a zirconium sulfate solution, washing, drying and roasting. A membrane contactor constructed by using the prepared ceramic catalytic membrane can remarkably improve the regeneration performance of a CO2-rich alcohol amine solution, effective combination of the structure and the performance is realized, the preparation method is simple and convenient, the condition is mild, and the ceramic catalytic membrane with relatively high catalytic activity can be prepared at relatively low concentration.

The application discloses a method for activating persulfate for improving the degradation performance of organic pollutants based on a flow-through electrocatalytic membrane, which comprises two steps of preparing a boron nitride electrocatalytic membrane loaded with bimetallic nanoparticles and carrying out a flow-through degradation reaction. Compared with a traditional mode, the flow-through mode provided by the application realizes effective coupling of a membrane catalytic system and a conventional electro-activated persulfate system, breaks through the limitation of low mass transfer efficiency, significantly improves the utilization rate of persulfate, and thus improves the degradation efficiency of organic pollutants. The flow-through reactor provided by the application has the advantages of simple structure, strong operability, low catalyst loss and good stability, has a wide industrial application prospect, and provides an efficient, economical and sustainable solution for the degradation of organic pollutants.

The invention belongs to the technical field of membrane catalysis, and relates to a method for reducing the Co particle size of a multi-channel Co / CM catalytic membrane. And coating the surface of the Co / CM catalytic membrane with a polydopamine coating, and then drying and calcining the Co / CM catalytic membrane. According to the method for reducing the particle size of Co in the Co / CM catalytic membrane, the particle size of Co can be effectively reduced, so that the active component Co in the catalytic membrane is re-dispersed, and the activity of the catalytic membrane in a p-nitrophenol catalytic hydrogenation reaction is obviously improved.

The application provides a method for treating fluorine-containing quinolone antibiotic wastewater by using an electrochemical membrane reactor, and belongs to the technical field of antibiotic wastewater treatment. The fluorine-containing quinolone antibiotic wastewater is introduced into the electrochemical membrane reactor for electrolysis treatment, wherein the electrochemical membrane reactor has an anode membrane and a cathode membrane, and the anode membrane is a titanium-based electrocatalytic membrane loaded with an electrocatalyst. The specific surface area of the anode membrane can be effectively increased by doping boron elements, the stability of the electrode membrane is improved, and then the electrocatalytic activity of the anode membrane is improved, and the degradation rate reaches 100% after electrolysis for 1h.

A printed ceramic catalyst support for a catalytic membrane and method of forming the same. The support includes a plurality of printed ceramic layers, wherein each printed ceramic layer includes a hexagonal grid having a plurality of hexagonal openings, and wherein adjacent printed ceramic layers are offset from each other such that the hexagonal openings of adjacent printed ceramic layers are misaligned; and a plurality of printed ceramic posts that connect adjacent printed ceramic layers.

This invention discloses a method for preparing a porous layered catalytic membrane and its application, belonging to the field of wastewater treatment technology. Using MgCl2 as an etchant, this invention achieves mild control over the crystal structure by regulating the etching time and concentration of two-dimensional CoCo PBAs nanosheets in MgCl2 solution. This method successfully forms an in-plane porous structure while maintaining the original aspect ratio and crystal integrity of the two-dimensional nanosheets. The resulting two-dimensional nanosheets further self-assemble to form a porous layered catalytic membrane, constructing a dual mass transfer channel that works synergistically between interlayers and in-plane. During dynamic operation, the membrane flux is approximately 1.5 times higher than that of the unpored sample, and pollutant degradation maintains a consistently high rate. This method has advantages such as mild reaction conditions, good structure preservation, simple process, and high reproducibility, effectively solving the problems of structural damage and difficulties in large-scale preparation in existing etching technologies.