40 results about "Superoxide radicals" patented technology

The invention provides an efficient chloramphenicol degradation method based on Co-Cu-carbon composite nano-catalyst activated peroxymonosulfate, which comprises the following steps: regulating the Co / Cu molar ratio in a bimetal organic framework precursor, and performing pyrolysis to prepare the Co-Cu-carbon composite catalyst with an optimized pore structure, graphitization degree and metal dispersity; peroxymonosulfate is activated by utilizing the synergistic effect of Co / Co and Cu / Cu redox pairs to generate sulfate free radicals, hydroxyl free radicals, singlet oxygen and superoxide free radicals, and direct oxidative degradation of chloramphenicol is promoted by taking a catalyst as an electron transfer bridge; the method realizes rapid and efficient removal of chloramphenicol, high mineralization rate, excellent cycle stability and strong anti-interference capability, and solves the technical problems of low removal efficiency, high cost and easy secondary pollution in the prior art.

The invention discloses application of copper-amino acid nano enzyme in preparation of anti-inflammatory drugs, and relates to the technical field of biomedical new materials, amino acids comprise glycine, arginine, histidine, threonine, phenylalanine and cysteine; the ratio of the amino acid to the copper ions is 1: (0.5-5), and the synthesis temperature of the copper-cysteine nano enzyme is 25-125 DEG C. The copper-amino acid nano-enzyme library established by the invention has efficient hydroxyl free radical, superoxide free radical and hydrogen peroxide scavenging activity; wherein the copper-cysteine nano-enzyme shows the highest enzymatic activity, and shows low toxicity and good biocompatibility in both the cell level and the animal level; meanwhile, the copper-cysteine nano-enzyme also shows anti-inflammatory activity and anti-oxidative stress activity, can remarkably improve cell inflammation and body inflammation, relieves and treats dextran sodium sulfate induced mouse ulcerative colitis, and can be further applied to preparation of drugs for treating inflammatory bowel diseases.

The invention relates to the field of flue gas carbon dioxide capture, in particular to a flue gas carbon dioxide capture and utilization method and system, and the system comprises: an absorption tower which is internally added with an absorbent and into which flue gas discharged by a factory is introduced, and is used for carrying out carbon dioxide capture on the flue gas; the absorbent comprises amino acid anions, cations and a transition metal complex; the amino acid anions are used for absorbing carbon dioxide and react with the superoxide free radicals to carry out chain proliferation; a cation that reacts with the product of the chain proliferation to reduce the loss of the chain proliferation; a transition metal complex reacts with the product of the chain proliferation to reduce the loss of the chain proliferation, and also reacts with the amino acid anion to enhance the solubility of the absorbent. According to the invention, efficient capture of carbon dioxide in flue gas, stable circulation of the absorbent, and resource recycling are realized.

The invention relates to the technical field of resource recovery, and provides a novel method for efficiently extracting gold. The method provided by the invention comprises the following steps: mixing tridecane and a gold-containing solution, forming micro-droplets under the ultrasonic action, and extracting Au (III) in the gold-containing solution. Au (III) in water is reduced through superoxide free radicals and electrons generated on the micro-liquid drop-oil interface under the ultrasonic action to generate Au (0) precipitates, and therefore efficient extraction of Au (III) is achieved. The method provided by the invention only needs to use commercially available tridecane and ultrasound as unique energy sources, and has the remarkable advantages of simplicity and convenience in operation, low cost and no secondary pollution. Results of the embodiment show that the method provided by the invention has a good removal effect on gold-containing solutions with the concentration of 0.01-1 mM and the pH value of 1-10, and the removal rate of gold can reach 95% or above.

The invention discloses a method for catalytically degrading dye wastewater based on tetrahedrite. The method comprises the steps that tetrahedrite is subjected to mechanical activation and then mixed with peroxymonosulfate, the mixture is added into dye wastewater, the initial pH of a system is adjusted, a catalytic degradation reaction is carried out, tetrahedrite is recovered after the reaction is finished, and tetrahedrite is obtained. The mass molar ratio of tetrahedrite to peroxymonosulfate is (0.33-6): 1g / mmol; the mass ratio of tetrahedrite to organic residues in the dye wastewater is (10-80): 1. According to the method, active sites on the surface of tetrahedrite are used for adsorbing PMS molecules, PMS is activated through electron transfer to generate active free radicals, singlet oxygen in the active free radicals plays a main role, superoxide free radicals and sulfate free radicals play auxiliary roles, and therefore the catalytic activity and the degradation rate of organic matter in dye wastewater are greatly improved.

This invention relates to a vehicle air conditioner, and the object of this invention is to improve the assemblability, maintenance, and repairability of a photocatalyst module by improving the intake housing structure, and to reduce air vortices generated at the air intake port side during air intake by the blower and the rumbling noise caused by these air vortices. To achieve this object, the vehicle air conditioner of this invention includes: an intake section that draws in internal and external air to blow them into the interior space of the vehicle; and a photocatalyst module that releases superoxide radicals into the air blown from the intake section into the interior space of the vehicle to purify the air, wherein the photocatalyst module is disposed on the outer surface portion of the downstream side of the blower housing of the intake section, and interference-avoidance recesses are formed on the outer surface portion of the intake housing corresponding to the periphery of the photocatalyst module disposed in the blower housing.

The invention discloses a preparation method and photocatalytic application of a metal viologen derivative framework for catalyzing C-H bond activation oxidative coupling, and belongs to the technical field of photocatalytic materials. In the preparation method, Zn < 2 + > is selected as a metal node, a viologen derivative with an excellent oxygen activation function is selected as a ligand, and a metal viologen derivative framework Zn-bcbpy is obtained through coordination by a solvent evaporation method. The viologen derivative can effectively activate molecular oxygen to generate superoxide free radicals, and then selective activation of C-H bonds is achieved through a hydrogen atom transfer mechanism. Through optimization of reaction conditions, under irradiation of blue light, the reaction yield of the Zn-bcbpy catalytic substrate is 55%, the Zn-bcbpy catalytic substrate can be stably recycled for five times, and good photocatalytic response performance of the catalyst is proved through electrochemical and impedance experiments.

The invention relates to a metal organic framework for improving charge separation efficiency based on a conjugated benzene ring, a preparation method thereof and application of the metal organic framework in degradation of methyl orange. The invention relates to a complex of MOF-2 [Zn8 (NDC) 8 (TRZ) 8] n, in which NDC is 2, 6-naphthalenedicarboxylic acid, and TRZ is 1, 2, 4-triazole, and a preparation method of the complex of MOF-2 [Zn8 (NDC) 8 (TRZ) 8] n. The extended pi conjugation in MOF-2 results in significant improvements, including reduced band gap, enhanced visible light absorption, and more excellent charge separation efficiency, as proved by comprehensive ultraviolet-visible spectroscopic analysis, electrochemical analysis, and valence band-XPS measurements. 83.8% of methyl orange degradation is realized by the MOF-2 under the irradiation of visible light within 30 minutes. According to mechanism research performed by using a free radical capture technology and electron spin resonance (ESR) spectroscopy, superoxide free radicals (. O2 <->), singlet oxygen (1O2) and hydroxyl free radicals (. OH) are determined as main active species.

The present application relates to the field of flue gas carbon dioxide capture, and particularly relates to a flue gas carbon dioxide capture and utilization method and system, which comprises: an absorption tower, inside which an absorbent is added and flue gas discharged by a factory is introduced, so as to capture carbon dioxide in the flue gas; the absorbent comprises amino acid anion, cation and transition metal complex; the amino acid anion is used to absorb carbon dioxide and reacts with superoxide free radicals to proliferate in a chain; the cation reacts with the product of the chain proliferation to reduce the loss of the chain proliferation; the transition metal complex reacts with the product of the chain proliferation to reduce the loss of the chain proliferation, and also reacts with the amino acid anion to improve the solubility of the absorbent. The present application realizes efficient capture of carbon dioxide in flue gas, stable circulation of the absorbent and recycling of resources.

The application discloses a kind of self-assembly nanomaterial and its application in ROS clearance.The self-assembly nanomaterial of the application is denoted as TPP-FFYp-O, and its structural formula is shown as follows:TPP-FFYp-O of the application is specifically cut to generate TPP-FFY-O by alkaline phosphatase (ALP) overexpressed after entering inflammatory cell, TPP-FFY-O is enriched near mitochondrion by the targeting effect of TPP, and is self-assembled to form nanoparticle and stays in inflammatory cell by π-π stacking.Nanoparticle surface enrichment of a large number of TEMPO can convert superoxide radical anion (O2 ·‑ ) in mitochondrion into hydrogen peroxide (H2O2), and then decompose into oxygen and water, thereby significantly reducing the ROS level in inflammatory cell.This enzyme-controlled self-assembly nanoparticle improves the stability of TEMPO and the ability of ROS clearance, and has good application prospect.

This invention relates to the field of microfluidic sensing and detection technology, and more particularly to a photoelectric / fluorescence dual-mode self-calibrating microfluidic sensor for the detection of various mycotoxins, its fabrication method, and its application. The microfluidic sensor comprises a three-channel microfluidic chip and a substrate. In its fabrication, the three independent working electrodes and an integrated reference-counter electrode system are integrated into the microfluidic chip, utilizing oxygen-rich vacancy Io. 0.2~0.4 S 0.3~0.5 Using BiOBr (ISBO-OVs)@Au composite material as the sensing substrate, an internal secondary light source is formed by the chemiluminescence reaction of luminol-superoxide radicals, which can cascade and amplify the photocurrent signal. At the same time, combined with the specific recognition function of 7DCCA labeled aptamers, the sensitivity and specificity of microfluidic sensors for detecting trace fungal toxins are greatly improved.

The invention relates to a carbon nanotube embedded artificial cell, a preparation method thereof and an application of the carbon nanotube embedded artificial cell in degradation of antibiotic resistance genes, and belongs to the technical field of environmental functional materials. According to the material, an artificial cell membrane formed by lipidosome serves as a shell, layered double-oxide hollow spheres derived from ferrocobalt layered double hydroxides are packaged in the shell, and carbon nanotubes are embedded into the artificial cell membrane to serve as a transmission channel. The preparation method comprises the following steps: preparing carbon spheres by a hydrothermal method, preparing ferrocobalt layered double hydroxides by a coprecipitation method, carrying out composite calcination to obtain layered double oxide hollow spheres, and finally constructing artificial cells by a film hydration method and embedding the artificial cells into the carbon nanotubes. The material can be used for catalytically degrading antibiotic resistance genes in water, singlet oxygen and superoxide free radicals are generated through peroxymonosulfate activation, gene segments are effectively attacked, and efficient degradation is achieved. The method has the advantages of efficient catalytic activity and confinement encapsulation, magnetic recovery is facilitated, and a novel environment-friendly method is provided for treatment of antibiotic resistance genes.

The invention discloses a preparation method and application of a semen allii tuberosi active extract, and belongs to the technical field of deep processing of medicinal and edible plants. According to the method, only water and edible ethanol are used as solvents in the whole process, independent deproteinization and decolorization steps in which toxic organic solvents participate are not included, and the target extract is prepared through water extraction, concentration, alcohol precipitation, resin purification and drying under the synergistic effect of 65%-75% alcohol precipitation and 40% edible ethanol single-stage elution. The mass fraction of polysaccharide in the prepared extract reaches 25%-30%, the SORAC index of the superoxide free radical scavenging capacity is 5500.00-6000.00 [mu] mol SE / g, and the extract has high oxidation resistance and the activity of assisting in reducing blood sugar in the early stage of diabetes. The method is simple in process, easy to scale, safe and free of toxic solvent residues, the product can be directly used for food and health food, and a stable and feasible technical scheme is provided for high-valued application of the semen allii tuberosi.

The present application relates to a kind of based on Co3O4-ZIF@CNT catalytic membrane-UV irradiation efficient removal antibiotic and resistance gene method, the treatment method of the present application is based on catalytic oxidation filter membrane-UV irradiation integration device carries out, catalytic oxidation filter membrane-UV irradiation integration device in the filter membrane-UV reaction component realizes the organic combination of Co3O4-ZIF@CNT catalytic membrane and ultraviolet irradiation, after wastewater is filtered, it is followed by ultraviolet irradiation, enough hydroxyl radical, singlet oxygen, superoxide radical, sulfate radical and other active oxygen components are generated, the efficient removal of antibiotic and resistance gene and other new pollutants is realized.The production and species of active oxygen species such as sulfate radical, singlet oxygen in the system are significantly improved, and high-efficiency water treatment effect is achieved under the condition of low oxidant dosage, low UV irradiation dose.

The invention belongs to the technical field of photocatalysis and functional coordination chemistry, and particularly relates to a metal organic cage catalyst based on ligand engineering regulation and a method for photocatalytic synthesis of hydrogen peroxide in pure water. According to the invention, a tripyridine ligand containing pyridinium substituent groups is designed through a ligand engineering strategy, and the tripyridine ligand and zinc ions are self-assembled to form the metal organic cage catalyst with a tetrahedral structure. By introducing a pyridinium group into a ligand structure, the electron attraction capability of a system is enhanced, and an efficient charge transfer channel is formed. Active intermediates (such as hydroxyl free radicals and superoxide free radicals) are effectively stabilized by the confinement space of the cage body, and the decomposition reaction of hydrogen peroxide is inhibited. The structure can efficiently separate photo-induced electrons and holes under the illumination condition and promote the double-two-electron synergistic process of oxygen reduction reaction and water oxidation reaction, so that hydrogen peroxide is efficiently generated in a pure water system without a sacrificial agent.

The invention belongs to the technical field of photocatalysis, and provides a Fe / LCDs-TCN composite catalyst for removing organic pollutants as well as a preparation method and application thereof.The preparation method comprises the following steps: firstly, preparing carbon nitride TCN by taking melamine and urea as mixed precursors as raw materials; then, TCN is added in the process of preparing CDs and Fe raw material solutions for mixing and heating, the Fe / LCDs-TCN composite photocatalyst is prepared through thermal calcination, and molecular oxygen in air can be efficiently activated to degrade organic pollutants. The Fe / LCDs-TCN composite photocatalyst prepared by the invention has a unique hollow tubular structure, increases active sites, improves the electron transfer rate, has a good energy band structure, not only can activate oxygen to form superoxide free radicals, but also can react with water to generate hydroxyl free radicals and improve the degradation capacity of photocatalysis, does not need additional strong oxidants (PMS and the like), and is suitable for industrial production. An excellent organic pollutant degradation rate can be achieved in a mild air environment and a relatively wide pH range; and the raw materials are low in price, non-toxic and harmless, and excellent in degradation performance, and have very high application value and prospect.

The invention provides a device and a method for detecting peroxy hydroxyl radicals in atmosphere based on a chemiluminescence method. The device comprises a sampling unit, a dilution unit, a chemiluminescence detection unit and pipelines for connecting the sampling unit, the dilution unit and the chemiluminescence detection unit, wherein the sampling unit is configured to collect an atmospheric sample and convert peroxy hydroxyl free radicals in the atmospheric sample into superoxide free radicals through an alkali buffer absorption liquid to obtain a buffer solution containing the superoxide free radicals; the dilution unit is configured to mix and dilute a buffer solution containing superoxide radicals and a diluent to obtain a diluted sample; the chemiluminescence detection unit is configured to collect a chemiluminescence signal generated by mixing and reacting the diluted sample with a chemiluminescence reagent.

The application discloses an electrode material based on a non-haem iron catalyst and a preparation method and application thereof, and belongs to the field of electrocatalytic water treatment. The electrode material is used as a substrate, and an auxiliary ligand polymer layer and a non-haem iron catalyst layer are sequentially deposited on the substrate; the auxiliary ligand polymer layer is polymerized from organic monomers; the non-haem iron catalyst layer is formed by reaction of a ferrous salt and dopamine to form a precursor and then electrochemical polymerization; and the auxiliary ligand polymer layer and the non-haem iron catalyst layer are connected through coordination bonds. The auxiliary ligand polymer layer and the non-haem iron catalyst are electrochemically polymerized on the electrode material, so that the selectivity of the electrode material for electrocatalytic oxygen two-electron reduction to produce hydrogen peroxide is improved, and the hydrogen peroxide yield is increased. In addition, the non-haem iron catalyst can further produce superoxide free radicals through regulation of single-electron reduction of oxygen, promote the generation of hydroxyl free radicals from hydrogen peroxide, and maintain good electrocatalytic removal efficiency of organic pollutants under near-neutral conditions.

The present invention relates to a vehicle air conditioner, and the object is to improve the installation position of a photocatalyst module so that the superoxide radicals generated in the photocatalyst module can be brought into contact with a larger amount of air, thereby enabling the processing efficiency of removing malodor, bacteria, various contaminated substances in the air blown into the cabin to be improved. To achieve this object, the present invention is a vehicle air conditioner including a photocatalyst module that causes photocatalysis so as to release superoxide radicals into an internal flow path of an air conditioner housing unit, thereby purifying the air blown into the cabin along the internal flow path, wherein the photocatalyst module is installed on an outer surface portion of the air conditioner housing unit that is located between a blower for sucking and blowing internal air and external air into the cabin and a heat exchanger for cooling or heating the air blown into the cabin.

The invention discloses a secondary water supply water tank outlet water pressure electro-catalysis purification device which is connected between a water tank outlet pipe and a lifting pump front pipe in series. The device main body is alternately provided with purification areas and slow flow reaction areas along the water flow direction, and the slow flow reaction areas are positioned between adjacent purification areas; and at least three sets of piezoelectric potential energy purification devices consisting of piezoelectric potential energy nets and piezoelectric purification units are fixed in each purification area. The piezoelectric potential energy net is provided with a potential energy titanium net protruding in the water flow direction and a piezoelectric node ball net fixed to a node. The piezoelectric purification unit comprises lead-free piezoelectric ceramics which are embedded and fixed in the meshes and are in direct contact with the water flow, a pressure contact rod for transmitting the impact force of the water flow to the ceramics, and a dowel bar. Water flow impacts and excites the lead-free piezoelectric ceramic to generate piezoelectric catalytic reaction, hydroxyl free radicals and superoxide free radicals are generated, and disinfection by-products are degraded. The device utilizes water flow kinetic energy for self-energizing purification, is non-toxic and efficient, does not change pipeline pressure, and is suitable for a secondary water supply system of a high-rise building.

The invention relates to the technical field of photocatalysis, in particular to a photocatalyst for preparing lactic acid from glucose and a preparation method of the photocatalyst, and the catalyst is a ZIS / g-C3N4 heterojunction composite material with an interface C-S bond and is prepared through in-situ growth by a one-step hydrothermal method. An interface C-S bond serves as an efficient electron transmission channel, the separation and migration efficiency of photon-generated carriers is greatly improved, the energy band structure of the composite material is optimized, and selective generation of a key active species superoxide free radical (. O2) is facilitated. The catalyst can efficiently catalyze glucose conversion under visible light (lambdagt, 420 nm) and alkaline conditions, a fructose intermediate C3-C4 bond is accurately broken, lactic acid is directionally generated, and the lactic acid selectivity reaches up to 95.5%. The catalyst is simple in preparation method and good in stability, and a new strategy is provided for high-value utilization of biomass resources.

The invention discloses a preparation method of a fruit pigment-based composite nanomaterial lipstick. The plant lipstick is prepared from the following raw materials in parts by weight: 1-2 parts of palm wax, 10-13 parts of white beeswax, 10-13 parts of sweet almond oil, 58 parts of shea butter, 2-3 parts of vitamin E, 0-1.2 parts of Chinese wolfberry pigment, 0-1.2 parts of citrus pigment, 0-0.3 part of grape pigment, 1 part of ultraviolet-induced grape cells and 0.1 part of citrus essential oil. The film-forming property and the stability of the lipstick are improved through compounding of the citral-chitosan nano-emulsion, and all the plant components play a role together, so that not only is rich color selection provided for a user, but also the lasting lip moistening and beautifying effects can be provided. The invention creates a complete method from pigment preparation and cell suspension system induction to preparation of the citral-chitosan nano-emulsion, so that natural plant pigments are effectively utilized; the lipstick provides a new way in the aspects of preventing chapping and peeling of the lips, reducing cheilogramma, neutralizing superoxide radicals, increasing the antioxidant function, improving the gloss of the lips, enriching the color and the like.

The application discloses a monatomic catalyst for high-selectivity generation of superoxide free radicals, and a preparation method and application thereof. x The catalyst comprises nitrogen-doped Ti3C2T x Nanoplate and transition metal monatomic aiming at asymmetric coordination structure. The preparation method comprises mixing Ti3C2T x nanoplate, nitrogen precursor and soluble transition metal salt, self-assembly, centrifugation, freeze-drying and pyrolysis. The monatomic catalyst can realize high-selectivity generation of superoxide free radicals, is a novel catalyst capable of directional generation of superoxide free radicals, high efficiency, low consumption and recycling, and can realize rapid and thorough removal of organic pollutants in water under the condition of low catalyst dosage when used as a catalyst for activation of peroxymonosulfate and treatment of wastewater, can realize effective purification of organic wastewater, and can overcome defects such as large catalyst dosage and low PMS activation efficiency in a heterogeneous catalytic process, and has a good application prospect.

The application discloses a degradation method of bisphenol organic pollutants, and relates to a preparation method of rare earth doped manganese iron spinel with a particle structure and application of the manganese iron spinel and persulfate in degradation of bisphenol organic pollutants through a hydrodynamic cavitation technology. The application mainly relates to a combination of a Fenton-like oxidation technology of the rare earth doped manganese iron spinel with a particle structure and persulfate and a hydrodynamic cavitation technology. The method comprises the following steps: under the condition of hydrodynamic cavitation, the prepared rare earth doped manganese iron spinel with a particle structure activates persulfate through electron transfer between surface defects and rare earth elements, thereby generating a large number of superoxide free radicals to degrade bisphenol organic pollutants. In combination with abundant gas-liquid interfaces provided by nanobubbles generated by the hydrodynamic cavitation, the method increases the contact opportunity of active oxygen species and pollutant molecules, thereby improving the reaction rate and degradation efficiency. The method realizes efficient degradation of bisphenol organic pollutants, and provides a green and efficient solution for water treatment.

This invention relates to a heterogeneous photocatalytic method for the absolute quantitative detection of superoxide radicals based on bioenzyme labeling and interfacial elution. The method is an interdisciplinary approach combining analytical chemistry, environmental functional materials, and heterogeneous photocatalysis. It addresses the technical shortcomings of heterogeneous photocatalytic systems in detecting superoxide radicals, including interfacial adsorption shielding, easy disproportionation loss of signal molecules, and the lack of absolute quantitative standards. The method involves constructing a standard curve using a xanthine / xanthine oxidase system; adjusting the pH of the reaction system; introducing a highly polar organic solvent for interfacial elution; and achieving complete capture of the signal molecules adsorbed at the solid-liquid interface through physical separation. This invention combines physical separation methods such as filtration and centrifugation to eliminate optical scattering interference, fills the gap in the lack of unified quantitative standards for long-wavelength photocatalytic activity, and provides a precise quantitative means for the photocatalytic ROS production rate. This invention is used for the quantitative detection of heterogeneous photocatalytic superoxide radicals.

The application belongs to the technical field of carbon nanomaterials, and particularly relates to a carbon dot assembly, a preparation method and application thereof. The application provides a carbon dot assembly. Compared with traditional carbon dots, a donor-acceptor structure promotes the charge separation process in the carbon dot assembly, so that electrons can be transferred from the core as an electron donor to the interface as an electron acceptor, and then interact with the surrounding oxygen to promote the generation of superoxide free radicals and photo-generated holes. The carbon dot assembly provided by the application has excellent properties, can specifically generate type I reactive oxygen species, oxidize important biological substrates through photo-generated holes, and thus realize efficient anti-tumor photodynamic therapy. In addition, the carbon dot assembly has a larger particle size, and is more conducive to being targeted to tumor tissues through the enhanced permeability and retention effect of tumor tissues, and thus realizes efficient tumor killing.

The invention discloses a rhenium-copper double-loaded ozone catalyst and a preparation method and application thereof. The preparation method comprises the following steps: uniformly mixing aluminum oxide with copper salt, rhenate and a solvent, and standing overnight after vibration treatment; and filtering, collecting filter residues, and roasting to obtain the rhenium-copper double-loaded ozone catalyst. According to the rhenium-copper double-loaded ozone catalyst, activated aluminum oxide serves as a carrier, perrhenate radicals and copper ions serve as main active components, copper can inhibit metal ions from being dissolved out, and the rhenium-copper double-loaded ozone catalyst is prepared through an impregnation and calcination method; copper and rhenium are effectively loaded on porous activated aluminum oxide through high-temperature roasting, and ozone is adsorbed and promoted to be decomposed into hydroxyl free radicals, superoxide free radicals, singlet oxygen and other active oxygen in combination with the reaction activity of copper ions and perrhenate radicals, so that the purposes of effectively degrading organic matters in water and purifying water are achieved.

Due to the unique electronic structure, the rare earth iodate crystal is widely applied to the fields of optics, magnetism, catalysis, energy storage and the like. The invention relates to a samarium iodate rare earth crystal, a preparation method and application of the samarium iodate rare earth crystal in photocatalytic degradation of organic pollutants. The chemical formula of the samarium iodate rare earth crystal is SmI3O9 or Sm4I12O36, the samarium iodate rare earth crystal has a symmetric center and belongs to a monoclinic system, the space group is P21 / n (No.14), the cell parameters are alpha = 90 degrees, beta = 96.827 (2) degrees, gamma = 90 degrees and Z = 1, and the crystal is prepared through a hydrothermal method which comprises a hydrothermal mineralizer method and a hydrothermal self-crystallization method. The crystal is ground into powder, the powder is placed in water polluted by organic pollutants, a water sample is placed in an external illumination environment, energy is provided by external illumination, electron-hole pairs generated by Sm4I12O36 induce generation of hydroxyl free radicals and superoxide free radicals, the hydroxyl free radicals and the superoxide free radicals are combined with the organic pollutants, the original structure of the organic pollutants is destroyed, and the organic pollutants can be purified. The degradation of organic pollutants is realized.

The application belongs to the technical field of wastewater treatment, and provides a method for treating medical wastewater by using iron-nitrogen co-doped biochar to activate peroxyacetic acid, which comprises the following steps: adding iron-nitrogen co-doped biochar and peroxyacetic acid into medical wastewater, and treating the wastewater under stirring conditions; during the wastewater treatment process, the iron-nitrogen co-doped biochar activates the peroxyacetic acid to generate organic free radicals, superoxide free radicals and singlet oxygen to degrade organic pollutants in the wastewater, and meanwhile, the iron-nitrogen co-doped biochar adsorbs and removes part of the pollutants in the wastewater; the iron-nitrogen co-doped biochar has a porous structure, the iron species in the iron-nitrogen co-doped biochar includes Fe 0 , FeS, Fe3O4, Fe3N and Fe4N, and the intensity ratio I D / I G of the D band and the G band of the Raman spectrum of the iron-nitrogen co-doped biochar is 2-2.6. The application uses biomass-derived iron-nitrogen co-doped biochar as a material for activating peroxyacetic acid, has the characteristics of green efficiency and no secondary pollution, and can improve the degradation efficiency of medical wastewater while reducing the treatment cost.

This invention discloses a supported Au1Cu 24 Preparation of / g-C3N4 catalyst and its application in photocatalytic degradation. This catalyst utilizes Au1Cu 24 Copper alloy nanoclusters supported on a g-C3N4 support were constructed to address the problems of low efficiency, rapid electron-hole recombination, and poor stability in existing photocatalytic materials. The preparation steps are as follows: first, a g-C3N4 support is prepared, and then Au1Cu is synthesized. 24 Clusters, then Au1Cu 24 A composite catalyst was obtained by dispersing the catalyst in dichloromethane and mixing it with g-C3N4, followed by solvent evaporation. This design effectively suppressed photogenerated carrier recombination and significantly improved photocatalytic activity and stability by modulating the cluster electronic structure and charge distribution through heterometallic doping, combined with the anchoring of the active component by the g-C3N4 support and its role in promoting interfacial charge separation. When applied to the photocatalytic degradation of methylene blue under xenon lamp irradiation, it exhibited excellent degradation performance and cycle stability, with superoxide radicals (·O2) as the main active species. ‑ ) and holes (h + This invention provides a new technical solution for the efficient treatment of organic dye wastewater.