69 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 relates to the technical field of mineral materials and nano-enzyme catalysis, in particular to an iron-containing layered silicate mineral nano-enzyme as well as a preparation method and application thereof. The preparation method comprises the following steps: carrying out ball milling on the iron-containing layered silicate mineral, carrying out centrifugal washing, and drying to obtain the iron-containing layered silicate mineral nano-enzyme. According to the method, silicate minerals with a layered structure and rich iron content are adopted as raw materials, the ball-milled layered silicate mineral nano-enzyme is successfully prepared through a ball milling method, the crystallinity of the minerals is reduced, the surface acidity of the minerals is improved, and low-spin iron is generated, so that the affinity of the ball-milled minerals to H2O2 is enhanced; h2O2 is catalyzed to generate singlet oxygen and superoxide free radicals, so that the peroxidase-like activity of the ball-milled minerals is improved. The enzyme-like activity is improved by 10 times, high catalytic activity can still be kept under the neutral condition, and the method can be used for colorimetric sensing and antibacterial application of small biological molecules such as glucose, hydrogen peroxide and glutathione.

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.

The invention discloses a photochromic TiO2-PEG200 (Polyethylene Glycol 200) nano particle and an application of the photochromic TiO2-PEG200 nano particle in photocatalytic oxidation of a C-H bond. The catalyst is synthesized through a solvothermal method, PEG200 is used as a solvent and a modifier, and self-doped Ti < 3 + > and surface oxygen vacancies are introduced into TiO2. Under the irradiation of blue light (405nm), the catalyst generates a photochromic effect, Ti < 4 + > is reduced into high-concentration Ti < 3 + > in situ, and meanwhile, a large amount of superoxide free radicals (O < 2 + >) are generated. A photo-generated hole directly activates an ethylbenzene alpha-C-H bond to generate a benzyl free radical, and the benzyl free radical reacts with a superoxide free radical (O2.) and is finally converted into acetophenone. The catalyst has excellent visible light response and charge separation efficiency, and the acetophenone yield is up to 56 mmol.g <-1 >. H <-1 > and is 10 times that of traditional TiO2. The reversible circulation of Ti < 3 + > / Ti < 4 + > enables the catalyst to maintain good stability, and the activity is still maintained at 95% or above after five times of circulation. The operation conditions are mild (room temperature and normal pressure), a strong oxidant is not needed, an efficient, stable and environment-friendly photocatalysis solution is provided for C-H bond activation, and the method has important application value in the field of fine chemical synthesis.

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.

The application relates to a method for inactivating viruses in sewage. The method comprises the following steps: introducing heterotrophic bacteria into sewage to be inactivated; increasing the carbon-nitrogen ratio of the sewage during the activation and expansion of the heterotrophic bacteria; washing and resuspending the activated and expanded heterotrophic bacteria to form a heterotrophic bacteria liquid to be used; inoculating the heterotrophic bacteria liquid into the sewage and reducing the carbon-nitrogen ratio of the sewage, so that the heterotrophic bacteria produce an oxidative stress response to inactivate viruses. The method adjusts the carbon-nitrogen ratio to make the heterotrophic bacteria change from an eutrophic environment to an oligotrophic environment, activates the oxidative stress pathway of the heterotrophic bacteria, increases the generation of oxidative active species such as superoxide free radicals, causes oxidative damage to the virus shell or envelope, and thus promotes the inactivation of viruses. The method is simple and efficient, and has a wide application scenario.

The present application discloses a photoelectrocatalytic reactor, a reaction system for continuously and deeply treating wastewater and an application thereof, which includes an anode current collector tank, a photoanode unit, an insulating unit, a cathode and a cathode current collector. A light-transmitting window is provided at the bottom of the anode current collector tank, and a water inlet is provided at the bottom of the anode current collector; a water outlet is provided on the cathode current collector. The insulating unit is embedded in the anode current collector tank, and the cathode current collector is embedded in the insulating unit. A liquid flow channel is formed between the anode current collector tank, the insulating unit and the cathode current collector. Through the design of the embedded structure, it is easy to assemble and can avoid wastewater leakage at the same time; the light-transmitting window is arranged below the reactor. While the light source is fully close to the photoanode unit, it is ensured that the photoanode unit is fully immersed in the reaction solution. The oxygen generated by the photoanode unit during the wastewater treatment process can realize redox through the cathode to generate superoxide radicals, improving the treatment ability of fluorinated aromatic wastewater.

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 present application relates to the field of biological detection, and discloses a chemiluminescence nano probe and a preparation method and application thereof. The present application utilizes oxalate-based chemiluminescence energy donor and red organic dye as light-emitting energy acceptor; utilizes hydrophilic polymer as matrix raw material, and prepares the chemiluminescence nano probe through water-in-oil-in-water multiple emulsification. The obtained chemiluminescence nano probe has a chemiluminescence half-life of up to 1000 seconds, a detection limit of 0.27 micromole for superoxide free radicals, can not be interfered by other ions, and shows strong and stable chemiluminescence performance, and can be used for monitoring diseases related to superoxide free radicals.

The invention discloses a lime composite agent for phosphogypsum innocent treatment based on an inorganic formula, a preparation method and application, and belongs to the technical field of resource utilization, the developed'alkali neutralization-photosensitive catalysis-excitation emulsion 'composite agent breaks through the technical defects of a traditional lime agent, lime powder and multiple components are compounded, and the comprehensive utilization rate of the lime powder is improved. The calcium-based composite alkali material with high alkalinity is prepared, the emulsification degree of lime powder is improved, and the activity degree of lime milk is enhanced. Compared with a traditional ardealite neutralization treatment process, the method has the advantages that the ultraviolet illumination step is added, soluble fluorine and phosphorus ions can be physically adsorbed, photo-generated holes can be physically adsorbed, generated superoxide free radicals can destroy molecular structures of organic matters in ardealite, decomposition of the organic matters is promoted, meanwhile, the component A of the exciting agent is optimized, and the utilization rate of the exciting agent is increased. And the modified polyacrylamide microspheres are added as a complexing agent, so that the modified polyacrylamide microspheres are promoted to be complexed with the carrier adsorbent under ultraviolet radiation, and the curing effect is improved.

The invention discloses a primary battery base material capable of directionally generating free radicals, a material and a preparation method, and solves the problems that the free radicals generated by a water treatment material are single in type and uncontrollable, and the pertinence on the characteristics of organic pollutants and the degradation of the free radicals and organic matter functional structures is not strong. According to the primary battery base material capable of directionally generating the free radicals, the concentration of the generated free radicals is greatly improved, and the wastewater treatment efficiency is improved; according to the primary battery material capable of directionally generating the free radicals, the primary battery base material capable of directionally generating the free radicals and one of copper, manganese and lanthanum are used as components to synthesize the primary battery material capable of efficiently and directionally generating the free radicals, and the iron-carbon-copper nanometer material can improve generation of superoxide free radicals; the iron-carbon-manganese nano material can improve generation of hydroxyl free radicals, the iron-carbon-lanthanum material can accelerate the generation rate of the free radicals, regulation and control of the generation types of the free radicals are achieved by compounding different metal materials, and the free radicals can also be generated under neutral and alkaline conditions.

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 application discloses a preparation method of Bi-containing nylon 6 antibacterial black fiber, and comprises the following steps: adding bismuth nitrate pentahydrate and ammonium metavanadate into a solvent, stirring to obtain a bismuth vanadate precursor solution; mixing the bismuth vanadate precursor solution, nylon 6 chip powder and nylon 6 chips, melt plasticizing, drawing, water tank cooling, cutting, vibration screening and vacuum constant temperature drying to obtain nylon 6 bismuth vanadate master batch; adding spinning grade nylon 6 chips into a main feeding position, adding carbon black powder and an additive into a side feeding position, melt plasticizing, drawing, water tank cooling, cutting, vibration screening and vacuum constant temperature drying to obtain nylon 6 black master batch; mixing the nylon 6 bismuth vanadate master batch, the nylon 6 black master batch and nylon 6 chips, and extruding to obtain the Bi-containing nylon 6 antibacterial black fiber; the application can generate hydroxyl radicals and superoxide radicals under photocatalysis to kill and inhibit the growth and reproduction of bacteria, and the application does not contain heavy metals, and has the characteristics of low cost, non-toxicity, simple operation and good antibacterial performance.

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 present invention discloses a bifunctional algaecide for inhibiting the growth of harmful algae and a preparation method thereof, and belongs to the technical field of water pollutant treatment. The method of the present invention introduces an EDU functional group while condensing SiO2-COOH with CP through an EDCI-mediated condensation method, thereby obtaining a bifunctional algaecide SiO2@EDU@CP with flocculation / photocatalysis. Under the irradiation of a 23W white light lamp or even sunlight, SiO2@EDU@CP can generate superoxide radicals and holes to inhibit the growth of Microcystis aeruginosa. Through reasonable optimization of reaction conditions, the method can achieve an inhibition rate of up to 94.8% on Microcystis aeruginosa within 740 minutes of reaction under light, and can also inhibit the growth of cyanobacteria in the actual environment of Taihu Lake. The SiO2@EDU@CP has a very broad application prospect as an algaecide that can inhibit cyanobacteria in a broad spectrum.

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.