39 results about "Congo red" patented technology

The invention relates to the technical field of functional polymer materials and environmental pollution control, in particular to hydrogen bond self-assembled bio-based aerogel as well as a preparation method and application thereof. Quaternized chitosan and tannic acid are self-assembled in a water phase through hydrogen bonds and electrostatic interaction to form a three-dimensional network structure, no cross-linking agent or organic solvent is added, the specific surface area of the bio-based aerogel BET is 2-10 m / g, and through the strong electrostatic adsorption effect between cationic groups in the quaternized chitosan and anionic dye molecules (such as Congo red), the cationic groups in the quaternized chitosan and the anionic dye molecules (such as Congo red) are separated from the anionic dye molecules. The material shows excellent dye removal efficiency and adsorption capacity under the conditions of normal temperature and normal pressure and hydrogen bonds provided by rich phenolic hydroxyl groups in tannic acid molecules and a pi-pi accumulation effect, the aerogel can quickly adsorb anionic dye, the adsorption process is efficient, the selectivity is high, the structure is stable, and the aerogel is degradable and can be applied to the field of dye adsorption. And the method has good reproducibility and repeated use stability, and has wide practical application and popularization prospects.

This invention provides a composite aerogel based on Eucommia ulmoides gum and MXene nanosheets, its preparation method, and its application. The aerogel is prepared by reacting a toluene solution of Eucommia ulmoides gum with Ti3C2T... x MXene aqueous solution was mixed and a water-in-oil microemulsion was formed using a combination of ultrasound-assisted shaking. This allowed MXene nanosheets to self-assemble at the microemulsion droplet interface. Following vertical freezing and freeze-drying processes, a three-dimensional network structure of Eucommia ulmoides gum-Ti3C2T was successfully constructed. x MXene composite aerogel. The preparation method of this invention is mild and requires no chemical cross-linking agents. The resulting composite aerogel exhibits excellent adsorption performance for enrofloxacin, malachite green, Congo red, rhodamine, and kanamycin in water, with adsorption equilibrium times all within 10 minutes, enabling rapid removal of organic pollutants from water. This invention provides a new approach for the high-value utilization of Eucommia ulmoides gum and has promising application prospects in the field of water environment remediation.

The invention relates to the technical field of dye separation, and discloses a loose nanofiltration membrane and a preparation method and application thereof, the loose nanofiltration membrane comprises a porous support membrane, and a polyesteramide separation layer formed on the porous support membrane through one-step interfacial polymerization of nucleoside monomers and multi-acyl chloride monomers. The nucleoside monomer is one or more than two of adenosine, guanosine and cytidine nucleoside. The nucleoside monomer with a long-chain structure, a branched-chain structure, a rigid twisted structure and a plurality of hydrophilic reaction sites is selected as an interfacial polymerization water-phase monomer, so that the loose nanofiltration membrane is endowed with excellent permeation and separation performance. The membrane has a high rejection rate on dye molecules such as Congo red and methyl blue, also has high water permeability and extremely high dye / inorganic salt separation selectivity, and shows good application potential in the aspects of dye production and purification and dye wastewater recovery.

The invention belongs to the field of water purification and water recovery, and particularly relates to a biological geopolymer carbonized membrane which is prepared from bagasse powder and a geopolymer, and the biological geopolymer carbonized membrane comprises the following components in percentage by mass: 0.5-3% of bagasse, 0.1-2% of hydrogen peroxide, 0.01-0.06% of lauryl sodium sulfate, 20-27% of slag and the balance of water. The content of the metakaolin is 20%-27%, and the content of the water glass is 41%-46%. The invention also discloses a preparation method of the biological geopolymer diaphragm, which comprises the following specific steps: adding bagasse powder into a geopolymer raw material, uniformly mixing, curing at constant temperature, demolding, grinding and calcining to obtain the bagasse / geopolymer composite carbonized diaphragm. The invention also discloses an application of the biological polymer carbonized membrane in Congo red sewage and seawater desalination. The biological texture polymer carbonized membrane has the capacity of efficiently removing Congo red dye liquor and the capacity of interface evaporation, and application of the biological texture polymer carbonized membrane in multiple fields is achieved.

The invention discloses a preparation method and application of an organic acid and polyethylene glycol modified sodium-based beta-cyclodextrin metal organic framework, and belongs to the technical field of metal organic framework materials (MOF). The method comprises the following steps: firstly, preparing a Na-beta-CD-MOF (Na-beta-CD-MOF) by utilizing a methanol steam diffusion method or an ultrasonic-assisted synthesis method, and then carrying out crosslinking modification on the Na-beta-CD-MOF, organic acid (such as dibasic acid or tribasic acid as citric acid and malic acid) and polyethylene glycol (the molecular weight is 200-50000); the water stability, the pore structure and the adsorption performance on antibiotics and dye pollutants are obviously improved. The prepared organic acid and polyethylene glycol modified sodium-based beta-cyclodextrin metal organic framework has good biocompatibility and chemical stability, more adsorption sites are introduced, and pollutants such as ciprofloxacin hydrochloride, tetracycline hydrochloride and Congo red in wastewater can be efficiently removed. The method is green, environment-friendly, low in cost and simple and convenient to operate, and has a wide industrial application prospect.

The invention relates to the technical field of adsorbents, and discloses a preparation method and application of a sunflower stem pith foam adsorption material.The preparation method comprises the steps that microfibrillated cellulose, quaternized chitosan and sunflower stem pith powder are put into a beaker to be mixed, a cross-linking agent is added, and stirring cross-linking is conducted; and then cryopreserving and thawing to prepare the composite sunflower stem pith foam adsorption material with the dispersed sunflower stem pith powder wrapped by the chitosan. Chitosan is used as a support to support and disperse sunflower stem pith powder, so that sunflower stem pith agglomeration is avoided, and active adsorption sites are increased. The adsorption capacity of the sunflower stem pith foam adsorption material prepared by the method is greatly increased, the adsorption capacity of Congo red is 9 times that of uncompounded sunflower stem pith, the performance is greatly improved, and the sunflower stem pith foam adsorption material can be applied to adsorption of hydrophobic and anionic azo dyes and has a good application prospect. The adsorbent has the advantages of low cost, simplicity in preparation, no chemical pollution, reproducibility, excellent adsorption performance and the like.

The invention discloses a preparation method and application of a metal-organic dye adsorbent based on sulfonyl calixarene, Ni (II) is used as a metal node, and the metal-organic dye adsorbent is prepared through a solvothermal directional assembly strategy by utilizing the synergistic coordination effect of a dicarboxylic acid ligand 4, 4 '-dithiobisbenzoic acid and p-tert-butylsulfonyl calix [4] arene (H4TBSC). The sulfonyl calixarene-based structure metal-organic dye adsorbent with definite inner and outer cavity partitions is successfully constructed. The adsorption material comprises a central large cavity and two symmetrically distributed peripheral cavities, and the special structure enables the adsorption material to show excellent selective adsorption performance on Congo red (CR) dye molecules. And efficient separation of a Congo red / rhodamine B (RhB) mixed system can be realized through a molecular size screening effect. The invention provides a new thought and method for developing a multifunctional supramolecular adsorption material based on dynamic coordination engineering, and has a wide application prospect in the fields of dye separation and wastewater treatment.

The application relates to the technical field of complex nanomaterials, in particular to a preparation method of an indium complex nanomaterial, the obtained material and application thereof. The application discloses a preparation method of an indium complex nanomaterial, which comprises the following steps: adding inorganic indium salt and 5-bromoisophthalic acid into N,N-dimethylformamide to obtain a transparent reaction liquid; carrying out a solvothermal reaction on the reaction liquid in a reaction kettle; cooling the reaction kettle after the solvothermal reaction, and separating to obtain a solid crude product; washing the solid crude product, drying, and obtaining the indium complex nanomaterial. The application also discloses the indium complex nanomaterial prepared by the above preparation method and application of the indium complex nanomaterial in adsorption of organic dye wastewater. The indium complex nanomaterial prepared by the application has excellent adsorption performance on Congo red dye in a water environment, and also has certain adsorption performance on rhodamine B and methyl orange, and has relatively high practical application value in treatment of organic dye wastewater containing Congo red dye.

The invention provides a preparation method of a Ce doped BiOCOOH adsorption material. The preparation method is characterized in that Ce is doped in BiOCOOH, so that the specific surface area of the adsorption material can be greatly increased, and the preparation method is simple. The preparation method comprises the following steps: 1) dissolving a certain amount of bismuth nitrate pentahydrate in an ethylene glycol solution, stirring and adding a certain amount of sodium formate to obtain a mixed solution; 2) dissolving a certain amount of cerous nitrate in an ethylene glycol solution to obtain a mixed solution; 3) mixing the mixed solution in the step 1) and the mixed solution in the step 2) to obtain a precursor solution; and 4) placing the precursor solution in a constant-temperature oven, and carrying out high-temperature reaction. And washing and drying the product to obtain the Ce-BiOCOOH composite material. The adsorption material can adsorb 98.1% of Congo red within 5 min and shows a high adsorption rate, and after four adsorption cycle experiments, the adsorption rate of the adsorption material can still be kept at 90% or above, which indicates that the adsorption material has stability and reusability and is a potential excellent adsorption material.

This invention belongs to the field of nanofiltration membrane technology, and particularly relates to a polyamide nanofiltration membrane, its preparation method, and its application. The polyamide nanofiltration membrane provided by this invention includes an ultrafiltration membrane and a polyamide selective layer attached to the ultrafiltration membrane. The polyamide selective layer is formed by a polycondensation reaction of a fully amino columnar aromatic hydrocarbon [5] and 1,3,5-benzenetricarboxyl chloride. The polyamide nanofiltration membrane of this invention can separate organic micropollutants such as Congo red, Rhodamine B, methylene blue, and methyl orange dyes, with a rejection rate of more than 95%. It also has good separation performance for some inorganic salts, with a rejection rate of more than 50%. The polyamide nanofiltration membrane of this invention can adapt to some harsh acid and alkali environments while maintaining excellent rejection performance. The polyamide nanofiltration membrane provided by this invention also has excellent antifouling performance.

A kind of jamesonite and marmatite flotation separation method, comprising the following steps: (1) the lead-zinc ore containing jamesonite and marmatite is ground, so that the content of-74 microns is 80-90%, to obtain the concentration of 30-40% flotation slurry;(2) put Congo red dye into stirring barrel to make 5% mass concentration solution;(3) add 300-1200g / t Congo red dye to neutral pH slurry, and react with slurry for 5min, then add ethion and frother, after pulp conditioning, carry out flotation to obtain lead rough concentrate;(4) carry out cleaning operation on lead rough concentrate, only add Congo red dye in cleaning, and the amount of reagent is 50% of the previous operation.Middlings are returned to the previous operation in turn.The present application uses Congo red dye as depressor, which has good selectivity to marmatite, and can realize efficient separation of jamesonite and marmatite at neutral pH.

The application provides a Zn-MOF material and a preparation method and application thereof in Congo red dye adsorption, and relates to the technical field of metal organic framework materials.The preparation method comprises the following steps: 2-methyl imidazole is reacted with 3,6-dichloropyridazine to generate 3,6-bis(2-methyl imidazole) pyridazine in an alkaline solvent environment; and the Zn-MOF material is prepared by mixing and coordinating 3,6-bis(2-methyl imidazole) pyridazine, isophthalic acid and a zinc source.The Zn-MOF material prepared by the application can effectively adsorb Congo red.

The invention provides a preparation method of a phosphotungstic acid / silicon dioxide catalyst with a Janus structure and application of the phosphotungstic acid / silicon dioxide catalyst in a heterogeneous oxidation reaction. The catalyst takes silicon dioxide as a carrier, phosphotungstic acid is loaded on the surface, and an n-octane-anhydrous acetonitrile emulsion system can be effectively stabilized. The catalyst shows efficient catalytic activity in oxidative desulfurization and dye degradation reactions, can promote oxidative removal of dibenzothiophene and degradation of Congo red dye, is suitable for a complex heterogeneous reaction system in the thickened oil recovery and processing process, and has wide industrial application prospects.

The invention discloses carbon-based bimetal composite chitosan gel and application thereof to removal of dye in printing and dyeing wastewater, and belongs to the technical field of environmental functional materials and water treatment. The preparation method comprises the following steps: firstly, carrying out amino modification on wood charcoal through polydopamine modification and microwave hydrothermal treatment to obtain a PDA-coated BC material; and then mixing with chitosan sol, then carrying out coordination crosslinking with an iron-copper bimetal salt solution, and finally carrying out gelation, washing and freeze drying to obtain the composite gel. The prepared composite gel has the biocompatibility of chitosan, the high specific surface area of a carbon material and the synergistic enhancement effect of bimetal, and has the advantages that the composite gel can be used for treating dyes in printing and dyeing wastewater, especially anionic dyes; the adsorbent shows high adsorption capacity (for example, the Congo red adsorption capacity can reach 1678 mg / g or above) and excellent cyclic regeneration performance (the capacity retention rate gt after five times of circulation is 90%) which are far superior to those of a traditional adsorbent, and has a wide application prospect in the field of advanced treatment of industrial wastewater.

The invention provides a preparation method and application of a citric acid modified Cd-MOF material, and belongs to the technical field of metal organic framework materials. The citric acid modified beta-cyclodextrin metal organic framework (CA-beta-CD-MOF) is synthesized by adopting a chemical grafting and steam diffusion method, and the adsorption performance and the reusability of the citric acid modified beta-cyclodextrin metal organic framework (CA-beta-CD-MOF) are systematically researched. Parameters such as concentration, dosage, pH and the like of citric acid are associated, the adsorption effect of the citric acid on heavy elements in a portable solution is investigated, and the adsorption capacities of the citric acid on anionic dye Congo red (CR) and heavy metal ions (Cu < 2 + >) are as high as 900.9 and 287.4 mg.g <-1 > respectively. The citric acid modified beta-cyclodextrin metal organic framework (CA-beta-CD-MOF) obtained by the invention has the characteristics of being simple, green, environment-friendly and reusable, has excellent adsorption performance, and can be used for simultaneously removing organic dye and heavy metal ion pollution in water.

The invention discloses an adsorption method of Congo red dye, which comprises the following steps: adding bagasse porous carbon as an adsorbent into a Congo red solution, adsorbing for a period of time at constant temperature, and carrying out solid-liquid separation to obtain clear liquid, the bagasse porous carbon is obtained by soaking powdery bagasse in a phosphoric acid solution and a hydrogen peroxide solution, and then performing suction filtration, washing and calcining. The concentration of the phosphoric acid solution is 10-14 mol / L, the concentration of the hydrogen peroxide solution is 6-9 mol / L, and the molar ratio of phosphoric acid to hydrogen peroxide is (8-14): (6-12); the bagasse porous carbon prepared by the method retains oxygen-containing functional groups of a part of biomass raw materials, forms an aromatic structure, has an obvious pore structure, increases the number of pores, and provides more adsorption sites for Congo red. According to the adsorbent, the Congo red adsorption rate of 90% or above can be achieved within 80 minutes through chemical adsorption and monomolecular layer adsorption under optimized operation conditions.

The application discloses a dopamine in-situ growth ZIF-8 dye / salt separation loose nanofiltration membrane and a preparation method thereof, and comprises the following steps: preparing a Tris buffer solution by taking a Tris buffer solution as a solvent and an alcohol-water mixed solution; preparing a precursor solution by adding dopamine, polyethyleneimine and a metal ion compound into the buffer solution; depositing the precursor solution on a polysulfone membrane surface; dissolving 2-methylimidazole in the alcohol-water mixed solution and then depositing the 2-methylimidazole on the polysulfone membrane surface; pouring off the excess solution, drying the membrane and then storing the membrane in deionized water to obtain a filter membrane. The nanofiltration membrane prepared by the application can intercept dyes and almost completely pass bivalent inorganic salts, and can fully separate a mixed solution of Congo red, methyl blue and sodium sulfate. Meanwhile, the application is simple in operation, can be popularized to various material substrates, and has great application value and development prospect.

The present application relates to the technical field of Congo red derivative photocatalytic probe application, and particularly relates to a Congo red derivative photocatalytic probe, a preparation method and a use method thereof, comprising a compound I, the compound I is selected from at least one of the Congo red derivative photocatalytic probes, and the Congo red derivative photocatalytic probe comprises two arene, the arene represents an aromatic heterocycle, and the aromatic heterocycle is selected from one of a benzene ring, furan, thiophene and a naphthalene ring. The Congo red derivative photocatalytic probe provided by the present application can specifically label amyloid plaques in AD brain tissue slices, the binding affinity is significantly improved (Kd of Aβ 1‑40 The Congo red derivative photocatalytic probe can reveal the molecular heterogeneity of amyloid deposition and the key regulatory role of the mitochondrial autophagy-lysosome axis, provide a new tool for AD pathological mechanism research, support proteomic analysis and pathological mechanism analysis across brain regions (hippocampus / cortex), and protect the molecular structure and application in the research of neurodegenerative diseases.

Provided is a medical instrument having excellent slidability and durability. This medical instrument comprises a substrate layer and a surface lubricating layer supported on at least a portion of the substrate layer, wherein: the surface lubricating layer contains a block copolymer which has a constitutional unit (A) derived from a reactive monomer having an epoxy group and a constitutional unit (B) derived from a hydrophilic monomer, and a hydrophobic resin; and the standard deviation of the R values of the surface lubricating layer dyed with a Congo red solution is at most 10.

The invention discloses a carbon-modified magnesium-iron composite metal oxide catalyst as well as a preparation method and application thereof. The preparation method comprises the following steps: (1) by taking soluble magnesium salt and soluble iron salt as main raw materials, synthesizing a magnesium-iron hydrotalcite compound (MgFe-LDH) through a coprecipitation method; (2) fully adsorbing the obtained MgFe-LDH in an aqueous solution of anionic dye Congo red, centrifuging, washing and drying to obtain a dye-loaded precursor; and (3) in the air, roasting the precursor obtained in the step (2) at 400-700 DEG C to obtain the carbon-modified magnesium-iron composite metal oxide catalyst (C / MgFe-MMO). The method has the advantages of being simple in process, good in repeatability, high in yield, high in safety and suitable for large-scale production. The prepared C / MgFe-MMO catalyst shows excellent performance in a persulfate activation system.

The invention discloses cellulose-based core-shell structure aerogel as well as a preparation method and application thereof. The aerogel provided by the invention is of a shell-core structure, a core layer of the aerogel is formed by reacting carboxylated cellulose, chitosan and sodium alginate, a shell layer of the aerogel is formed by chelating sodium alginate and Ca < 2 + >, the specific shell-core layer structure has selective adsorption performance, the core layer adsorbs anionic dye, the shell layer adsorbs cationic dye, and anion and cation dye can be efficiently adsorbed at the same time; meanwhile, the aerogel material is good in stability, can keep high adsorption capacity in different pH and water environments, and still has good adsorption capacity on methylene blue dye and Congo red dye after being repeatedly used for five times. The cellulose-based core-shell structure aerogel provided by the invention overcomes the problems that the existing aerogel is difficult to adsorb zwitterionic dyes at the same time and active sites for adsorbing different dyes are blocked, and the cellulose-based core-shell structure aerogel is simple in preparation process and simple and convenient to operate, and has important significance on purification treatment and application of dye wastewater.

The invention relates to the technical field of application of Congo red derivative photocatalytic probes, in particular to a Congo red derivative photocatalytic probe as well as a preparation method and a use method thereof.The Congo red derivative photocatalytic probe comprises a compound I, the compound I is selected from at least one of the Congo red derivative photocatalytic probes, and the Congo red derivative photocatalytic probe comprises two arenes, arene represents a heteroaromatic ring, and the heteroaromatic ring is selected from one of a benzene ring, furan, thiophene and a naphthalene ring. The Congo red derivative photocatalytic probe provided by the invention can specifically mark amyloid plaques in AD brain tissue slices, the binding affinity is remarkably improved (Kd of Abeta1-40 is equal to 0.07 mu m), the molecular heterogeneity of amyloid deposition and the key regulation and control effect of mitochondrial autophagy-lysosomal axis are disclosed, a new tool is provided for AD pathological mechanism research, and the Congo red derivative photocatalytic probe has a wide application prospect. And cross-brain region (hippocampus / cortex) proteome analysis and pathological mechanism analysis are supported, and the molecular structure and application in neurodegenerative disease research are simulated to be protected.

The present application relates to the technical field of tight ultrafiltration membrane, and particularly relates to a tight ultrafiltration membrane based on choline derivative modification, a preparation method and application thereof. The preparation method selects a choline derivative with a hydroxyl group and a quaternary ammonium salt group as a bifunctional water phase monomer, selects an ionic strong polar monomer, and utilizes the electrostatic interaction between anions and cations to slow down the interface polymerization reaction to form a polyester modifier, so as to constrain the polymerization reaction position, accurately limit the polymerization reaction in the inside of the base membrane channel and the channel interface, promote the uniform and narrow membrane hole, and greatly improve the uniformity of the membrane pore size distribution. The tight ultrafiltration membrane can realize a high Congo red retention rate and a moderate sodium chloride retention rate, and exhibits excellent membrane separation performance in high-precision dye separation.

The invention discloses a visual detection sensor for mushroom toxins as well as a preparation method and application of the visual detection sensor. The sensor is composed of a magnetic molecularly imprinted polymer MIPs and dye particles preloaded on the magnetic molecularly imprinted polymer MIPs. The MIPs take Fe3O4 coated SiO2 as a magnetic core, and a specific cavity of a mushroom toxin template molecule is imprinted on the surface of the MIPs; the dye particles are metal organic framework materials ZIF-8-NH2 with the surfaces modified with IPPA, and Congo red dye is encapsulated in the dye particles. During detection, target toxin molecules and dye particles are competitively combined with cavities of the MIPs, the dye is replaced into a solution, after magnetic separation, acid is added for cracking to release a large amount of Congo red, and visual and quantitative detection is realized through solution color change or ultraviolet absorption intensity. The high selectivity of molecular imprinting and the signal amplification function of ZIF-8 are combined, and the method has the advantages of being high in sensitivity, good in selectivity, easy and convenient to operate and low in cost and is particularly suitable for on-site rapid screening of the mushroom toxins.

This invention discloses a cellulose-based composite bead for activating persulfate to degrade dyes and its preparation method, belonging to the field of water environmental protection. The preparation method includes: 1) preparing rough spherical CuMnO2; 2) preparing a CS-Ca@PEI / CuMnO2 composite bead catalyst; 3) mixing the obtained CS-Ca@PEI / CuMnO2 composite bead catalyst with persulfate and adding it to dye wastewater to degrade the dye wastewater. The catalyst preparation of this invention is simple, uses environmentally friendly biomass as the catalyst carrier, effectively improves the recovery efficiency of powdered catalytic materials, and the synthesized catalyst can efficiently degrade azo dyes, especially Congo red dye.

This invention belongs to the field of adsorbent technology, specifically relating to a covalent organic framework material Tp-ODA COF, its preparation method, and its applications. The Tp-ODA COF is composed of alternating 1,3,5-trialdehyde phloroglucinol and 4,4'-diaminodiphenyl ether linked by imine bonds, forming a periodic repeating unit and a porous network structure with a symmetry of P1. The repeating unit is a two-dimensional layered conjugated framework formed by covalently linking 1,3,5-trialdehyde phloroglucinol and 4,4'-diaminodiphenyl ether through imine bonds. The molecular formula of the repeating unit is C1. 54 H 36 N6O9. The covalent organic framework material Tp-ODA COF of the present invention exhibits efficient and stable adsorption performance for anionic dyes. Under the conditions of 25°C and pH=6, the maximum adsorption capacity for Congo red and methyl orange reaches 1532 mg / g and 1490 mg / g, respectively.

The application provides a rotating hydrothermal method for extracting valuable metals from red mud to prepare functional oxides and construction of composite membranes and application thereof. After Al, Fe and Ti in the red mud are respectively leached, the rotating hydrothermal method is used to prepare gamma-AlOOH, Fe2O3 multi-level hole microspheres and TiO2-I and TiO2-II functional nano oxides, and the prepared gamma-AlOOH, Fe2O3 multi-level hole microspheres and TiO2-I and TiO2-II functional nano oxides are applied to waste water treatment, so that the problem of double pollution of red mud and industrial waste water is solved. The particle size distribution of the prepared gamma-AlOOH, Fe2O3 multi-level hole microspheres and TiO2-I and TiO2-II functional nano oxides is narrower, the morphology is more uniform, the specific surface area is larger, and the abilities of adsorbing organic dyes such as Congo red, adsorbing hexavalent chromium and catalyzing degradation of tetracycline are all significantly improved. The constructed organic-inorganic composite membrane also significantly improves the mechanical, anti-swelling and adsorption properties of the membrane. The preparation method is simple, effective, green and environment-friendly, and realizes the treatment of waste with waste and the transformation of waste into treasure.

The application discloses a nanofiltration membrane and a preparation method and application thereof. The nanofiltration membrane comprises a polyether sulfone / sulfonated polysulfone base film, the base film is in a porous structure, and beta-cyclodextrin and polydopamine are fixed in the pores of the base film. The application utilizes the heat shrinkability of sulfonated polysulfone, mutual recognition of beta-cyclodextrin and dyes, and adsorption of polydopamine to realize excellent permeation flux and dye interception, the permeation flux reaches 225 L·m ‑2 ·h ‑1 ·bar ‑1 , and the interception rates of methyl blue and congo red are more than 96%. In addition, the permeation flux and separation performance of the nanofiltration membrane are still stable in a long-time continuous filtration process, and deionized water at 40 DEG C is more favorable to improve the cycle stability of the membrane.

The invention relates to an amorphous UiO-66 nano adsorbent as well as a preparation method and application thereof, and belongs to the technical field of adsorption materials. The preparation method of the adsorbent comprises the following steps: sequentially adding organic ligands terephthalic acid and acetic acid as well as a metal zirconium source into a mixed solvent consisting of a deep eutectic solvent and N, N-dimethylformamide, performing uniform ultrasonic treatment to obtain a reaction mixture, and finally performing solvothermal reaction in a reaction kettle to prepare a target product. The prepared amorphous UiO-66 nano adsorbent has the following characteristics that the amorphous UiO-66 nano adsorbent has an irregular nano-particle morphology, the average particle size is 17.4-24.0 nm, and the specific surface area is 330-370 m < 2 >. G <-1 >. The material shows excellent Congo red adsorption performance in dye wastewater treatment, the highest adsorption rate reaches 98.8%, the adsorption rate after four times of circulation still reaches 97.8%, the circulation stability is good, and efficient adsorption is kept within the pH range of 6-10. Adsorption of the amorphous Ui0-66 nano adsorbent to Congo red is mainly completed through cooperation of electrostatic interaction and pi-pi conjugation.

This invention provides a composite material for the simultaneous removal of phosphorus and small-molecule organic matter from mixed wastewater and its preparation method. The composite material is a Z-shaped heterojunction formed by introducing silver nanoparticles (Ag) between aluminum magnesium hydrotalcite (MgAl-LDH) and graphitic carbon nitride (g-C3N4), with a morphology of 50-300 nm nanosheet-like particles. The preparation method involves first co-precipitating magnesium nitrate and aluminum nitrate in a certain proportion, aging at a certain temperature, and drying to obtain MgAl-LDH. Then, MgAl-LDH and g-C3N4 are ultrasonically and stirred in anhydrous ethanol, evaporated to dryness, and calcined to obtain MgAl-LDH / g-C3N4. Finally, silver nanoparticles are deposited in silver nitrate solution via photoreduction to obtain the composite material MgAl-LDH / Ag / g-C3N4. The composite material of the present invention can simultaneously and efficiently remove phosphorus and small molecule organic matter from mixed wastewater. The small molecule organic matter includes antibiotics (tetracycline, levofloxacin, procyclofloxacin), cationic dyes (rhodamine B, methylene blue), and anionic dyes (methyl orange, Congo red).