57 results about "Radical oxidation" patented technology

Aiming at the problems of large flue gas nitrogen oxide generation amount, easy exceeding and serious pollution possibly existing in ammonia gas blending combustion, the invention provides an ammonia gas out-of-furnace bypass combustion blending combustion oxidation method, which comprises the following steps: preparing NO2 by virtue of an ammonia combustion system, generating O.free radicals by virtue of photo-thermal cracking of NO2, oxidizing NO in flue gas into NO2, cracking NO2 into N2, removing NO by virtue of NO2, and performing denitration by virtue of denitration, so that the nitrogen oxide in the flue gas is not easily generated. According to the method, SO2 is oxidized into SO3 through O.free radicals, the SO3 reacts with calcium for desulfurization, CO and VOCs are oxidized into CO2 and H2O, collaborative purification of multiple pollutants is achieved, reduction denitration and wet desulfurization are replaced and used for denitration and desulfurization of combustion flue gas and collaborative treatment of the multiple pollutants, and deep pollution reduction, carbon reduction, energy conservation and efficiency improvement are achieved.

The invention discloses a waste gas purification method, and belongs to the technical field of environmental protection. The method comprises the following steps: converting nitrogen-containing substances into NOO and adding the NOO into a high-temperature non-combustion area at the tail end of a hearth or the front end of a flue in combustion equipment, wherein fuel is burnt out; nO is cracked in the region to generate active free radicals; the free radicals oxidize NO in the flue gas to generate NO, and oxidize SOO, CO and VOCs to generate oxidation products; continuously cracking the generated NOs to form chain circulation; and the oxidation product is removed in a subsequent purification system. The NOs comprise pure NOs and dimers NO (nitrogen tetroxide) thereof, and NO is decomposed into NOs to participate in the reaction at high temperature. According to the invention, by optimizing the NO adding position, collaborative purification of multiple pollutants such as NOx, SOs, CO, VOCs and the like is realized, a reducing agent does not need to be added, ammonia escape is avoided, the investment and operation cost is low, and the method is particularly suitable for treatment of high-concentration CO and VOCs flue gas in industries such as coking and the like.

The invention discloses application of compound resina draconis in preparation of a medicine for treating acute myocardial infarction. The compound resina draconis has the effects of resisting free radical oxidation and platelet aggregation, expanding coronary artery, inhibiting increase of myocardial enzymology CPK and LDH and reducing myocardial oxygen consumption, so that the myocardial infarction range is reduced, and myocardial ischemic ST segment elevation is improved; the compound is combined with aspirin for treating acute myocardial infarction, and the compound and aspirin have a synergistic effect, play a role in resisting platelet aggregation and inhibit synthesis of thromboxane A2, and show a good ischemic myocardial protection effect. Meanwhile, according to the technical scheme that the compound resina draconis is used independently or combined with aspirin, the application range of the medicine is widened, contribution is made for research and development of the medicine for relieving side effects caused by aspirin treatment, and the application prospect is good.

The invention relates to the technical field of bamboo processing and modification treatment, and discloses a method for improving high-permeability bamboo modification, which comprises the following steps: preparing a mixed aqueous solution of 9.25-37 mmol / L of alkali compound and 9.3-27.8 mmol / L of persulfate, and dipping bamboo at normal temperature for 3-6 hours; the soaked bamboo wood is heated and activated, and the activation mode is selected from one of 60-80 DEG C constant-temperature water bath treatment, 300-550 W microwave radiation treatment or 100-400 W ultrasonic radiation treatment; and after the activated bamboo wood is cleaned to be neutral, freeze drying is conducted at the temperature ranging from-50 DEG C to-70 DEG C. According to the method, free radicals generated by alkali liquor swelling and synergistic thermal activation of persulfate are utilized, bamboo blocking pore extracts are oxidized and degraded, a fluid conduction path is dredged, the permeability and porosity of the bamboo are improved, the original mechanical strength of the bamboo is kept, and the technical problems that traditional modified liquid medicine is difficult to permeate, and a skeleton is damaged due to strong base treatment are solved.

The application belongs to the field of heavy metal water pollution treatment, and relates to a method for rapidly and efficiently oxidizing trivalent arsenic through enhanced electron transfer, which comprises multifunctional biochar preparation and efficient oxidation process design. The method uses sludge as a biochar precursor, obtains multifunctional biochar with strong alkalinity, high specific surface area and super electron conduction through high-temperature pyrolysis, directly introduces oxygen into an As(III) solution, adds the biochar into the system after the aeration is completed, and fully stirs. The method is simple, economically feasible, has extremely high oxidation efficiency, does not require additional chemical reagents, has no reagent residues, and does not require external light or electricity. The non-free radical oxidation path dominated by electron transfer and singlet oxygen is not easily affected by inorganic ions and humic acid in actual water bodies, has strong anti-interference ability, and has a wide application range. The application not only helps to enrich the catalytic oxidation theoretical system, but also greatly improves the practical feasibility of biochar application, and has good environmental and economic benefits.

The application discloses a method for removing trace sulfonamidochrysoidine in water by activating peracetic acid through complexation of manganese sulfate and 2-picolinic acid, wherein, (1) a homogeneous Mn(II)-PICA complex solution is prepared by mixing and stirring a manganese sulfate solution and a 2-picolinic acid solution; (2) peracetic acid solution and the homogeneous Mn(II)-PICA complex solution are added into water containing sulfonamidochrysoidine, and the mixture is fully stirred, and in the reaction process, high-valence manganese active species Mn(V)=O is generated; the system mainly adopts a non-radical oxidation path, has high selectivity to sulfonamidochrysoidine, and realizes degradation of the sulfonamidochrysoidine. The method has high activation efficiency and fast degradation speed, and the complex system significantly improves the activation efficiency of PAA, and the removal rate of sulfonamidochrysoidine can reach more than 90 % within 10 min, which is much higher than that of a single activation system.

In view of the foregoing, exemplary embodiments provide a method of manufacturing a semiconductor device and a substrate processing apparatus capable of efficiently performing radical oxidation.SOLUTION: According to one embodiment, a method for manufacturing a semiconductor device is provided. The method of manufacturing a semiconductor device includes performing radical oxidation on a first film using plasma generated by a processing gas containing a gas of an isotope of hydrogen.SELECTED DRAWING: Figure 1

The invention relates to the technical field of medical polymer materials, in particular to a high-crosslinking ultra-high molecular weight polyethylene material and a preparation method thereof.According to the method, two times of radiation and two times of heat treatment at different temperatures are combined, and high crosslinking and low free radical content are achieved through first-time radiation and remelting treatment; and secondary radiation and annealing treatment with the temperature lower than the melting point further improve the crosslinking degree and maintain high crystallinity. The obtained material is superior to a material prepared by a traditional single method in the aspects of residual free radicals, oxidation index, swelling degree, crystallinity, mechanical property, wear rate and the like, and has the advantages of high wear resistance, high oxidation resistance and high strength.

The invention relates to the technical field of graphene materials, and discloses a modified graphene material and a preparation method thereof.The preparation method comprises the steps that sodium lignin sulfonate is used for modifying graphene oxide through pi-pi stacking, and water-based stable dispersion liquid is prepared; saponified abietic acid is introduced, so that a abietic acid radical tricyclic hydrophobic skeleton is attached to the surface of graphene; compounding tung oil emulsion, performing free radical oxidation polymerization on alpha-eleostearic acid conjugated triene double bonds at the normal temperature of 15-35 DEG C to form a film, and covalently bonding graphene into an organic film-forming system through phenol-oxygen free radical coupling; zinc borate is added, zinc ions catalyze and solidify and promote generation of zinc abietate, and borate radicals and sodium lignin sulfonate hydroxyl form an inorganic borate cross-linked network; and adjusting the solid content and grinding to obtain a finished product. The prepared conductive ink is self-dried and cured at normal temperature, a cured coating has excellent water resistance and conductive stability, and the conductive ink is suitable for a heat-sensitive flexible base material.

The invention discloses a preparation method of 3-amino-1-adamantanol serving as a key raw material for synthesizing vildagliptin. According to the method, amantadine or amantadine salt is taken as a starting raw material according to a free radical-oxidation principle, N-Boc-amantadine is obtained through a Boc protecting group, then 3-(N-Boc-amino)-1-adamantanol is obtained through oxidation, and finally the 3-amino-1-adamantanol is obtained through three steps of removing the Boc protecting group. The method avoids using a nitration process, is simple and convenient to operate and is suitable for industrial production.

The application relates to the technical field of chemical vapor deposition equipment, and discloses a cleaning device based on a chemical vapor deposition reactor and a residue recovery structure thereof, which comprises a CVD reactor 1, a reaction part 2 is arranged in the CVD reactor 1, the reaction part 2 is a basic bearing and process adaptation structure of the CVD reactor 1, provides a temperature environment required by reaction, assists in gathering residues to a recovery area, provides an electrode basis for subsequent vacuum electrolytic cleaning, the reaction part 2 comprises a heating plate 21, the heating plate 21 is installed in the CVD reactor 1 in the form of an annular array, two cross beams 22 are connected in the CVD reactor 1, a guide plate 23 is symmetrically installed between the two cross beams 22, oxidative free radicals are generated by the vacuum electrolysis effect of a spiral electrode to oxidize metal oxide residues, ultraviolet lamps and a light-transmitting column array form global photolysis irradiation, and the two cooperate to realize efficient decomposition of multiple types of residues such as carbon-based and metal-based residues, and the problem of poor adaptability of traditional single cleaning technology is solved.

The invention discloses a method for initiating graft polymerization of carbohydrates and polyphenol pigments, and belongs to the technical field of functional modification of carbohydrates. A polysaccharide substance and a polyphenol pigment are used as research objects, and an ascorbic acid-oxidoreductase-initiator ternary initiation system is constructed according to the characteristics that an ascorbic acid-initiator system can rapidly initiate the polysaccharide substance to generate free radicals and an oxidoreductase-initiator system can initiate the polyphenol pigment to generate free radicals. The grafting polymerization reaction between polysaccharide substances and polyphenol pigments is realized by utilizing the principle that free radicals of the polysaccharide substances and free radicals of the polyphenol pigments can generate free radical polymerization, the grafting rate can be improved, and the grafted polysaccharide substances have antibacterial property and free radical scavenging property.

The application provides a single crystal silicon wafer cleaning system and method, and the cleaning system comprises a first cleaning tank, a second cleaning tank, a third cleaning tank, a fourth cleaning tank and a high-pressure conveying device; the fourth cleaning tank comprises a first tank body for containing a first cleaning solution containing hydrogen peroxide aqueous solution, a second tank body for containing a second cleaning solution containing hydrogen peroxide aqueous solution, a third tank body for containing a third cleaning solution containing hydrogen peroxide aqueous solution, at least one first light source for providing light to the first tank body, and at least one second light source for providing light to the third tank body; the first tank body and the second tank body are communicated through a first anti-radical oxidation reverse osmosis membrane; the second tank body and the third tank body are communicated through a second anti-radical oxidation reverse osmosis membrane; at least one composite plate is arranged in the first tank body and the second tank body respectively; each composite plate comprises doped graphene, and the problems of high single crystal silicon wafer cleaning cost and complex wastewater treatment are solved.

The application provides an edible active coating for preventing dry consumption under an ultralow temperature condition and a preparation method, and belongs to the technical field of active packaging. The application combines double-layer coatings, inhibits free radical oxidation generated by freezing through an inner antioxidant, and effectively locks water and blocks external oxygen permeation through the synergistic effect of an outer high-barrier structure, thereby significantly improving the freezing preservation effect of food, and the raw materials are natural and safe, the preparation method is reasonable, and the application has good practical application value. The application solves the problems of poor effects of edible freezing protection coatings suitable for extremely cold environments in the prior art.

The invention relates to the technical field of sewage treatment, in particular to a water treatment method based on non-free radical oxidation. The water treatment method comprises the following steps: adding soluble carbonate into sewage containing calcium ions to obtain calcium carbonate crystals, and then introducing ozone to oxidize the sewage to obtain purified water. According to the water treatment method provided by the invention, calcium carbonate can be generated in situ in the sewage, ozone is catalyzed by the calcium carbonate to be decomposed on the surface of the sewage to generate high-activity atomic oxygen, and efficient oxidative degradation of pollutants is realized through a direct electron transfer mechanism between the atomic oxygen and organic pollutant molecules. The method breaks through the limitation of a traditional free radical path, avoids the problem of hydroxyl free radical quenching, has the advantages of high catalytic efficiency, good stability, environmental friendliness and no need of additional addition of a catalyst carrier, can realize efficient removal of calcium ions in sewage, and can be widely applied to water treatment and deep treatment of refractory organic wastewater.

An etching method of etching silicon formed on a side surface of a recess that exists in a substrate includes: forming an oxide film on a surface of the silicon by performing a radical oxidation processing on the substrate; performing a chemical processing with a gas on the oxide film; and removing a reaction product produced by the chemical processing, wherein the forming the oxide film includes: a first phase of performing a radical processing with a plasma of an oxygen-containing gas; and a second phase of performing a radical processing with a plasma of the oxygen-containing gas and an etching gas, and wherein the forming the oxide film, the performing the chemical processing, and the removing the reaction product are repeated multiple times.

The invention discloses a method for preparing an arsenic passivator from coal gangue and iron tailings. The method comprises the following steps: mixing iron tailing powder, coal gangue powder and water to prepare slurry; introducing the mixed slurry into a closed reactor, carrying out free radical oxidation exothermic reaction on carbon-based minerals in the coal gangue in a high-temperature and high-pressure oxygen-controlled atmosphere to generate organic acid and organic matters, and forming a reducing atmosphere due to insufficient oxygen supply; under the high-temperature hydrothermal condition, decomposition and reconstruction of the iron tailings and the coal gangue powder are promoted, so that carbon organic matter is converted, iron is activated, and a passivation material is synthesized; and after the reaction is finished, carrying out solid-liquid separation on the reaction product, and washing to obtain the product arsenic passivator. According to the method, organic matter of carbon in the coal gangue is converted and high activity of iron in the iron tailings is converted under the hydrothermal condition of high temperature, high pressure and oxygen control, and the obtained arsenic passivator can effectively achieve fixed passivation of soil arsenic and improvement of the organic matter.

The methods and devices described herein provide for thin and high-quality oxide layers with controlled interfacial roughness. In some embodiments, the aforementioned oxide layers are formed using radical oxidation processes with slow oxidation rates and relatively low-to-moderate temperatures, followed by nitrogen (N2) annealing at relatively high temperatures to densify the oxide layer(s) while also relieving (e.g., relaxing) interfacial stresses by inducing the viscous flow of the oxide.

This invention relates to a method for deep dewatering and conditioning of sludge through electrolytically enhanced biochar activation of persulfate coupled with flocculation, and a method for preparing modified biochar. By coupling persulfate oxidation, electrochemical oxidation, and flocculation, and using modified biochar prepared from wastewater treatment plant sludge to activate the persulfate, strong oxidizing free radicals such as sulfate radicals are generated. These free radicals oxidize and degrade EPS in the sludge flocs, improving sludge dewatering performance. Simultaneously, within the electrochemical system, the modified biochar acts as a microelectrode between the cathode and anode, forming a micro-electrolysis system. This system effectively activates the persulfate to generate strong oxidizing free radicals such as sulfate radicals, thereby enhancing the system's oxidation capacity and achieving deep degradation of sludge EPS. Finally, flocculation conditioning promotes the aggregation of fine sludge particles, increases the aggregation strength of sludge flocs, and constructs a sludge cake structure with good filtration performance, achieving deep sludge dewatering.

The application discloses a nano-bubble enhanced reverse osmosis membrane system and an application method thereof, and belongs to the technical field of water treatment membrane separation. The system is composed of a nano-bubble generating and injecting module, a reverse osmosis membrane component and an online cleaning module. 10-200 nm negative nano-bubbles are prepared by ultrasonic cavitation or pressure dissolution method, and are uniformly injected into the water inlet end of the membrane after cyclone distribution. The functionalized membrane is modified by carbon nanotubes / metal organic framework and is decorated with a negative interface, and forms a double electrostatic repulsion layer with the nano-bubbles. Online cleaning is combined with ozone radical oxidation and gas-liquid pulse micro-jet physical peeling to realize drug-free membrane regeneration. The application solves the problems of traditional reverse osmosis membrane pollution, concentration difference polarization and high energy consumption through the synergistic effect of gas-liquid-membrane three phases, and is suitable for industrial production.

An etching method of etching Si or SiN existing on a substrate, includes: forming an oxide film on a surface of Si or SiN by performing a radical oxidation process on the substrate having Si or SiN; performing a gas-based chemical process on the oxide film; and removing reaction products produced by the gas-based chemical process, wherein the forming the oxide film, the performing the gas-based chemical process, and the removing the reaction products are repeated a plurality of times.

The invention discloses an oxidation pretreatment method for phoxim in an organophosphorus pesticide based on a photo-initiation free radical oxidation system, and the method comprises the following steps: mixing the organophosphorus pesticide with a photoinitiator, and carrying out oxidation pretreatment under illumination; the organophosphorus pesticide contains phoxim; the photoinitiator is any one or more than two of curcumin, alpha-terthienyl, a photoinitiator 819, a photoinitiator 2959 and tetraphenylporphyrin. The problems that in the prior art, an excessively added oxidizing agent cannot be completely reduced, the cost is high, and the detection result is inaccurate are solved. After illumination is stopped, free radicals in a reaction system can be dissipated in an extremely short time to form a neutralized state, and an additional reducing agent does not need to be added. The method disclosed by the invention has a very good effect on phoxim and also has important significance on guaranteeing food safety.

The invention discloses a non-free radical catalytic oxidation water treatment method for regulating and controlling a sulfamethoxazole degradation path by using nitrite, and relates to the technical field of water treatment, and the non-free radical catalytic oxidation water treatment method comprises the following steps: adding a carbonized polydopamine coated cobalt nanoparticle material and peroxymonosulfate into a to-be-treated water body containing nitrite and sulfamethoxazole; the method comprises the following steps: firstly, carrying out adsorption of an oxidant on the surface of a catalyst, and then carrying out non-free radical catalytic oxidation, so that nitrite and sulfamethoxazole are synchronously removed within a preset reaction time; in the reaction process, nitrite serves as a removed pollutant to be subjected to oxidation-reduction conversion and also serves as a degradation path regulator to inhibit generation of nitro by-products, a non-free radical oxidation system is constructed through carbonized polydopamine coated cobalt nanoparticles and peroxymonosulfate, a degradation path is regulated and controlled by the nitrite, and the degradation of the nitro by-products is inhibited. Nitrite and sulfamethoxazole in the water body are synchronously removed, and high-toxicity nitro byproducts are inhibited.

This invention relates to a method for esterifying alkyl aromatics and amides via benzylic radical polarity reversal, belonging to the field of compound preparation technology. This invention leverages the advantages of electrochemical anodic oxidation to anolylate benzylic C(sp) groups. 3 The amide attacks the carbocation to form an imine intermediate, which is then hydrolyzed to break the C–N bond, thus achieving the synthesis of benzyl esters. This invention avoids the use of transition metals, high temperatures, high pressures, and stoichiometric amounts of hazardous oxidizing and reducing agents, and establishes good functional group tolerance, expanding the range of substrates and providing a supplementary approach for the synthesis of benzyl esters under mild conditions.

Various embodiments of methods are provided herein for oxidizing a surface of a semiconductor substrate. In the disclosed embodiments, gas-phase oxidizing free radicals are generated and used to oxidize an exposed surface of a material and form a thin oxide film there on. The gas-phase oxidizing free radicals are generated via ultraviolet (UV) photolysis of vaporized peroxide solutions. In some embodiments, an aqueous hydrogen peroxide (H2O2) solution is vaporized and photolyzed with UV light to form gas-phase hydroxyl (HO*) free radicals, which oxidize the exposed surface of the material to form a thin oxide film on the exposed surface of the material.

The invention belongs to the field of catalyst preparation technologies and wastewater treatment, and particularly relates to a preparation method and application of a salt-resistant supported copper-manganese spinel catalytic ozonation catalyst. The preparation method comprises the following steps: dissolving Cu (NO3) 2.3 H2O and MnCl2. 4H2O in a molar ratio of 1: 2 at room temperature by adopting a dipping and calcining method, then adding an Al2O3 carrier activated by NaOH, and dipping for 12 hours; and drying in a vacuum oven at 60 DEG C overnight, transferring into a tubular furnace, and calcining for 4 hours at 600 DEG C in an Ar atmosphere to obtain CuMn2O4 / Al2O3. The catalyst realizes double improvement of the number of active sites and intrinsic activity through metal-carrier electron interaction, and obviously enhances the activation capability on ozone. The non-free radical oxidation pathway (dominated by surface adsorption state oxygen atoms * O and singlet oxygen < 1 > O2) has strong anti-interference capability, and is suitable for advanced treatment of high-salt organic wastewater.

This invention relates to the field of graphene materials technology, and discloses a modified graphene material and its preparation method. The preparation method includes: modifying graphene oxide with sodium lignosulfonate through π-π stacking to prepare an aqueous stable dispersion; introducing saponified rosin acid to attach the rosin acid tricyclic hydrophobic framework to the graphene surface; compounding tung oil emulsion, utilizing the α-tung acid conjugated triene double bond to form a film through free radical oxidation polymerization at room temperature (15-35℃), and covalently bonding graphene into the organic film-forming system through phenolic radical coupling; adding zinc borate, where zinc ions catalyze curing and promote the formation of zinc rosin acid, and borate ions form an inorganic borate ester crosslinking network with the hydroxyl groups of sodium lignosulfonate; adjusting the solid content and grinding to obtain the finished product. The conductive ink prepared by this invention self-cures at room temperature, and the cured coating has excellent water resistance and conductivity stability, making it suitable for heat-sensitive flexible substrates.

The application belongs to the technical field of hematin quantitative detection, and specifically discloses application of methylene blue cyclopropyl formylated derivative as a chromogenic substrate for detecting hematin, and uses methylene blue cyclopropyl formylated derivative AMB as a chromogenic substrate for detecting hematin Hemin; compared with a classical substrate TMB, the methylene blue cyclopropyl formylated derivative AMB of the application has higher sensitivity in the detection of hematin Hemin; in addition, the amino protons of the methylene blue cyclopropyl formylated derivative AMB of the application are fully substituted by methyl, which inhibits the participation of active oxygen free radicals in oxidation, but is still sensitive to the oxidation pathway of ferric free radicals, has better selectivity compared with TMB, and the AMB system can effectively detect hematin Hemin in a serum sample. Therefore, it can be said that for the detection of hematin Hemin, AMB is a more excellent colorimetric substrate than TMB.

The application discloses a slow-release biochar-based compound fertilizer and a production process thereof, and belongs to the technical field of biochar-based fertilizers.The compound fertilizer comprises, in terms of weight parts, modified biochar 30-45 parts, inorganic nutrient raw material 50-65 parts, composite cross-linking binder 4-10 parts and chelated trace elements 1-3 parts;the production process comprises, in sequence, biochar micropore cleaning and activation, free radical oxidation modification, surface grafting polymerization, vacuum impregnation loading and cross-linking embedding granulation;the application increases oxygen-containing functional groups on the surface of biochar and constructs hierarchical pore structures through an oxalic acid-assisted catalytic free radical oxidation system and a maleic anhydride-itaconic acid double monomer grafting technology;through modification of biochar and in combination with a vacuum loading process, nutrients are locked inside the hierarchical pores, and then, a moisture-responsive binder coating is supplemented, so that double synergistic slow release of nutrients is realized, the problems of loose nutrient loading, easy loss and short slow-release period of existing carbon-based fertilizers are solved, and the application is especially suitable for saline-alkali soil improvement and dry farming.

The invention provides a leaching method for precious metal in precious metal waste, and relates to the technical field of precious metal recovery. According to the method, under the acidic condition, pollution-free halide salt and persulfate are adopted for leaching the precious metal, and halide salt can provide halide ions to be coordinated with the precious metal to generate a complex; the persulfate generates SO4-free radicals with strong oxidizing property, the SO4-free radicals oxidize halogen ions X-to generate halogen free radicals X, the SO4-free radicals and the X free radicals jointly oxidize low-valence precious metal in the precious metal waste, a precious metal-halogenated complex is obtained, and leaching of the precious metal in the precious metal waste is achieved. The leaching method provided by the invention is low in leaching cost, simple to operate and high in applicability and feasibility of industrial production.