57 results about "Reactive nitrogen" patented technology

The invention relates to the technical field of plasma equipment, in particular to a plasma reactor, a plasma activated water preparation device and a plasma activated water preparation method, and the plasma activated water preparation device comprises a dielectric barrier discharge unit and a pulse discharge unit. The pulse discharge unit is arranged above the dielectric barrier discharge unit, and a mixed fluid inlet is formed in the bottom of the dielectric barrier discharge unit. And the top of the pulse discharge area is provided with a mixed fluid outlet. One is that discharge of the dielectric barrier discharge unit and pulse discharge of the pulse discharge unit are utilized to respectively provide a large amount of active oxygen and active nitrogen, and two discharge units are integrated in one plasma reactor to realize mutual dissolution promotion of the active oxygen and the active nitrogen; secondly, the multiple stages of plasma reactors are connected in series, the stages are increased according to the water demand, the plasma dosage is ensured, and plasma activated water is prepared in a non-circular circulation mode; and thirdly, the mixing time of the gas-liquid mixed fluid in the preparation device of the plasma activated water is long, so that the waste of the active particles can be prevented.

According to the low-temperature plasma activated water preparation system, the preparation method and the application, a direct-current voltage-driven air jet plasma generation device which is small and convenient and does not need a complex gas circuit is utilized in the preparation system, and air is adopted as working gas to treat an aqueous solution; an aqueous solution rich in active oxygen, active nitrogen and other active ingredients is efficiently generated, and the active ingredients have high oxidation-reduction potential and can effectively degrade PhSMe. The concentration of active particles in PAW is improved by optimizing the discharge voltage, the discharge time and the concentration of the sodium molybdate solution, so that the degradation effect of PhSMe is improved. An auxiliary agent sodium molybdate is introduced in the degradation process, and the degradation effect is two times higher than the pure PAW treatment effect.

The invention relates to a diatomic iron-iron site nano-enzyme constructed by relieving oxidative stress and cartilage degeneration and used for targeted osteoarthritis treatment. According to the invention, a nitrogen-doped porous carbon anchored diatomic iron nano enzyme catalyst (Fe2-NCs) with Fe-Fe dimer coordination is developed by using a'subject-object 'strategy. The Fe2-NCs protect cartilage cells from oxidative stress induced apoptosis by modulating ROS and active nitrogen species (RNS) and promoting O2 release. In addition, Fe2-NCs restores mitochondrial function by inhibiting NOX4 expression, improving ATP production, and normalizing COXIV levels. In an in-vivo OA model, the Fe2-NCs can reduce the expression of a pro-inflammatory medium COX-2 through an NF-kappa B signal channel, inhibit the up-regulation of MMP-13 and delay the degradation of type II collagen. The invention provides a new theoretical framework and methodological approach for the treatment of osteoarthritis, and has important clinical and scientific significance.

A preparation method of a high-activity nitrogen-doped carbon-loaded CoRu nano-alloy is used for enhancing pH universal hydrogen evolution, and is characterized by comprising the following steps: dissolving dopamine hydrochloride in an aqueous solution containing H2O2 and CuSO4. 5H2O, and magnetically stirring to form a uniform mixture; and pre-wetting carbon cloth with ethanol, immersing the pre-wetted carbon cloth in the dopamine solution for 10 minutes, taking out the pre-wetted carbon cloth, washing the pre-wetted carbon cloth with deionized water for three times, and carrying out vacuum drying to obtain the polydopamine modified carbon cloth marked as PDA / CC. And immersing the obtained PDA / CC into 20 mL of aqueous solution containing Co (NO3) 2.6 H2O and RuCl3 for 6 hours to realize metal ion adsorption. And washing and drying a sample, and calcining the sample in a tubular furnace at 700 DEG C in an N atmosphere for 2 hours to obtain the self-supporting nitrogen-doped porous carbon-loaded CoRu alloy material which is recorded as CoxRu (at) CN / CC. Through a synthesis strategy based on active ion capture and in-situ carbon thermal reduction, and through construction of a nitrogen-doped carbon cobalt ruthenium alloy nanostructure and a strong metal-carrier synergistic effect, efficient hydrogen overflow and establishment of stable active sites are realized; therefore, the performance bottleneck that high activity and high stability of a traditional electrocatalyst in a wide pH range are difficult to cooperate is broken through.

The invention disclosed relates to a mobile and modular nitrogen production system utilizing a non-thermal plasma reactor. The system is designed for scalable on-site production of reactive molecules including Reactive Nitrogen Species (RNS) and Reactive Oxygen Species (ROS), applicable in various industries including agriculture and healthcare. Key components include one or more improved modular plasma reactors integrated within a mobile nitrogen production system. The integrated system features a plurality of improved and removable reactors, which further comprise fixed pintle injectors for fluid introduction and flow regulation, a voltage conditioner, and a ground discharge system for electrical stabilization. A controller is integrated to manage the plasma generation process, utilizing real-time data from sensors to optimize performance. The invention offers enhanced efficiency, safety, and adaptability, with applications including producing fertilizers and other reactive species-based products.

The application discloses a microbial electrochemical system device and method for realizing wastewater treatment, CO2 fixation and in-situ synthesis of microbial protein synchronously, which comprises an anode chamber, a cathode chamber, a protein production chamber, a power supply, a mixed gas tank and a peristaltic pump; the anode chamber, the cathode chamber and the protein production chamber are sequentially arranged from left to right; a cation exchange membrane is arranged between the anode chamber and the cathode chamber; a cation exchange membrane is also arranged between the cathode chamber and the protein production chamber; an anode is arranged in the anode chamber and connected with the positive pole of the power supply through a wire, and a resistor is arranged on the wire connecting the anode and the positive pole of the power supply. The microbial electrochemical system and the protein production system are coupled to form an ammonia-nitrogen recovery-in-situ protein synthesis microbial electrochemical system, the system can convert active nitrogen into high-value protein products in-situ, the system can synchronously treat wastewater, recover ammonia-nitrogen and fix carbon dioxide, and has excellent environmental benefits.

The present invention belongs to the field of biomedicine, and specifically relates to a light-controlled release of ONOO － Compounds and preparation methods and applications thereof. The present invention provides ONOO ‑ The donor is composed of a diphenyl phenothiazine analogue and arginine covalently linked. Its strong conjugation effect makes it extremely photoresponsive. The polymer has near-infrared light emission and excellent reactive oxygen and reactive nitrogen generation capabilities. When L6 is irradiated with a 660nm laser, it will produce superoxide anions and singlet oxygen. Singlet oxygen oxidizes the guanidine group of arginine to produce NO and ·O2 ‑ and NO to form peroxynitrite (ONOO ‑ ), achieving the goal of highly effective tumor cell killing. Therefore, this compound is a potentially highly effective photosensitizer for tumor killing. Compared to conventional photosensitizers, this killing method has stronger oxidative and nitrative cell damage capabilities, and its development cycle is shorter than that of other photosensitizers, thus possessing great potential application value in clinical treatment.

The invention relates to the field of active nitrogen testing, and discloses a double-flow reactor experimental device for measuring active nitrogen discharge and reaction rate, the double-flow reactor experimental device comprises a reaction mechanism and an irradiation mechanism, the reaction mechanism comprises a first reactor, and the outer surface of the first reactor is provided with a constant-temperature water layer; the second reactor is communicated with the first reactor through a first connecting pipe; the ozone analyzer is mounted on the first connecting pipe; the two dryers are mounted on the first connecting pipe, and a constant-temperature water layer outside a first reactor in the reaction mechanism can stably control the temperature and store a soil sample; the second reactor is communicated with the first reactor through a first connecting pipe and used for particle membrane samples; the ozone analyzer, the NOx analyzer and the dryer on the first connecting pipe can synchronously detect the concentration of related gas, and the dryer can eliminate water vapor interference; the problem of measuring the key parameters of the active nitrogen under the background of farmland nitrogen application and urban agglomeration nitrate pollution is solved, and the method has the advantages of multi-parameter synchronous analysis, accurate environmental condition simulation, low-interference detection and the like.

The invention discloses a light-driven nitrogen cycle pyrolysis-gasification biomass graded utilization system and method, and relates to the technical field of biomass graded utilization, the system comprises a pretreatment unit, a light-driven nitrogen-doped pyrolysis reactor and a photocatalytic nitrogen de-intercalation gasification reactor as core parts, an energy collection unit and a post-treatment unit. The method comprises condensation ammonia-doped pyrolysis and condensation gasification: pretreated biomass is subjected to condensation ammonia-doped pyrolysis in a pyrolysis section to generate high-activity nitrogen-doped coke and hydrogen, then the nitrogen-doped coke enters a gasification section to be subjected to condensation gasification, under the action of high-concentration water vapor, nitrogen elements in the coke are deintercalated, more active sites are released, NH3 is generated at the same time, and the nitrogen-doped coke enters the gasification section to be subjected to condensation gasification; the nitrogen can flow back to the pyrolysis zone for cyclic utilization, and a nitrogen doping-de-intercalation catalytic cycle process is formed. The light-driven nitrogen cycle grading technology is adopted, efficient doping of nitrogen elements at the high temperature is achieved, high-activity nitrogen-doped coke is generated, and production of high-quality synthesis gas and cyclic utilization of nitrogen are achieved.

The invention discloses a metal organic framework compound constructed by an antibacterial agent as well as a preparation method and application of the metal organic framework compound, and relates to the technical field of biomedical materials. The preparation method comprises the following steps: dissolving a soluble metal salt and 2-nitroimidazole in an organic solvent, carrying out a mixed reaction, centrifuging to obtain a precipitate, and cleaning the precipitate to obtain the metal organic framework compound. An antibacterial drug metal organic framework compound with ultrasonic and acid responsiveness is constructed by utilizing a single antibacterial agent, active oxygen and active nitrogen can be generated under ultrasonic stimulation, meanwhile, controllable release of the antibacterial agent in a biological membrane infected slightly-acidic environment is achieved, and the antibacterial drug metal organic framework compound has a good antibacterial effect on deep tissue bacterial infection. The compound shows a potential application effect on prevention of oral caries.

The invention disclosed relates to a mobile and modular nitrogen production system utilizing a non-thermal plasma reactor. The system is designed for scalable on-site production of reactive molecules including Reactive Nitrogen Species (RNS) and Reactive Oxygen Species (ROS), applicable in various industries including agriculture and healthcare. Key components include one or more improved modular plasma reactors integrated within a mobile nitrogen production system. The integrated system features a plurality of improved and removable reactors, which further comprise fixed pintle injectors for fluid introduction and flow regulation, a voltage conditioner, and a ground discharge system for electrical stabilization. A controller is integrated to manage the plasma generation process, utilizing real-time data from sensors to optimize performance. The invention offers enhanced efficiency, safety, and adaptability, with applications including producing fertilizers and other reactive species-based products.

A plasma-assisted green ammonia synthesis system capable of self-maintaining operation belongs to the field of chemical engineering and electrochemistry and comprises an air pretreatment module, an ammonia electricity synthesis module and a water supply device. The air pretreatment module is driven by a high-voltage power supply, adopts a dielectric barrier discharge form and is used for efficiently activating nitrogen and oxygen in air, and airflow rich in active nitrogen species is input into an absorption buffer chamber of the ammonia electricity synthesis module through a gas conveying pipeline, is converted into NOx <-> and then enters an electrolysis cathode chamber to be reduced into ammonia; the chambers are accurately separated through anion exchange membranes and cation exchange membranes, so that selective transmission of ions and efficient separation of materials are realized; and the water supply device continuously supplies water to the electrolytic anode chamber to provide a water source required by ammonia synthesis. The method is simple and convenient to operate, supports distributed deployment, can realize continuous ammonia electricity synthesis by taking air and water as raw materials without any electrolyte maintenance, has the remarkable advantages of simple process, stable operation, environment friendliness and the like, and provides a brand new solution for green ammonia synthesis.

The invention discloses a nitrogen fixation device and a nitrogen fixation method based on alternating current plasma bilateral electrode discharge. The device adopts a pair of electrodes which are respectively connected with a high-voltage end and a low-voltage end and are arranged at the top of a sealed reaction tank, so that the two electrodes can discharge to the surface of an aqueous solution to form stable double-side discharge plasmas. A metal or metal oxide coating (such as TiO2, Pt, CuO and the like) is deposited on the surface of the discharge end of the electrode through a physical or chemical means, so that the breakdown voltage of liquid phase discharge can be reduced, the heat loss caused by excessive discharge is inhibited, and the energy utilization efficiency is improved. In the reaction process, mixed gas containing nitrogen serves as a gas source, nitrogen-containing products such as NH4 < + >, NO2 <-> and NO3 <-> are generated in an aqueous solution under the action of active nitrogen-oxygen groups generated by discharging, and the nitrogen-containing products are collected through reaction liquid and tail gas absorption liquid respectively. The device is simple in structure, the raw materials are easy to obtain, the discharge stability is excellent, the nitrogen fixation energy consumption is remarkably reduced through the synergistic effect of double-side discharge and an electrode surface coating, the nitrogen fixation yield is increased, and the device is suitable for distributed, miniaturized or green nitrogen fixation scenes.

The invention is applicable to the technical field of sterilization and disinfection, and provides a plasma waterway sterilizer for an oral comprehensive treatment table. The plasma discharge cavity is used for ionizing air to generate active particles; the high-voltage power supply is connected with the plasma discharge cavity; the plasma water treatment water tank is used for storing undisinfected tap water; the semiconductor condensation backflow module is connected between the plasma water treatment water tank and the plasma discharge cavity and is used for dehumidifying airflow flowing out of the plasma water treatment water tank; the air pump is connected between the plasma discharge cavity and the semiconductor condensation backflow module and used for driving airflow to flow through the plasma discharge cavity to mix the active particles with tap water; and the water storage tank is connected with the semiconductor condensation backflow module. Air can be ionized under the action of high pressure to generate high-concentration active oxygen and active nitrogen particles, and the active oxygen and the active nitrogen particles are continuously mixed and reacted with tap water, so that activated water rich in strong oxidizing substances such as hydrogen peroxide and ozone is generated.

The invention discloses a preparation method of a nano-enzyme preparation as well as a product and application of the nano-enzyme preparation. The synthesis method of the nano-enzyme preparation comprises the following steps: mixing a transmembrane protein solution and a solution containing one or more nano-enzymes to prepare the nano-enzyme preparation. The nano-enzyme can target a disease site, and on one hand, the nano-enzyme removes active oxygen and active nitrogen species on the disease site; on the other hand, the nano-enzyme can be combined with cytokines of disease parts, the promotion effect of the cytokines on diseases is inhibited, and the effect of preventing and treating colitis and colitis-related colon cancer diseases is achieved. The nano-enzyme developed by the invention not only can relieve oxidative stress of diseases, but also can reduce the pro-inflammatory and tumor-promoting effects of cytokines, and can effectively treat colitis-related colon cancer caused by deterioration of colitis.

The invention discloses a bimodal plasma activation fog fruit fresh-keeping device and method based on ethylene precise regulation and control. The device comprises a treatment cabin, a plasma generation unit and a gas-liquid mixing unit. The plasma generation unit comprises a first discharge module and a second discharge module; the first discharge module discharges in a specific proportion of He / N2 / O2 mixed gas to generate first plasma rich in strong oxidizing active oxygen species, and the first plasma is used for efficiently killing surface pathogenic bacteria and oxidizing and decomposing ethylene gas released by fruits; and the second discharge module adopts low-duty-ratio pulse discharge under inert gas to generate second plasma rich in active nitrogen species, and the second plasma is used for mildly permeating the interior of the fruit skin and inhibiting the activity of the endogenous ethylene synthesis key enzyme. According to the method, ethylene metabolism is accurately regulated and controlled through external elimination and internal suppression bimodals, an ethylene regulation and control closed loop is constructed, the environmental ethylene concentration can be continuously maintained to be 0.1 ppm or below, and fresh keeping of respiration climacteric fruits is achieved.

The invention discloses an anti-aging ganoderma lucidum polysaccharide-milk composition and a preparation method and application thereof.The preparation method includes the steps that ganoderma lucidum sporocarp serves as a raw material, after superfine pretreatment is conducted, ganoderma lucidum polysaccharide is extracted in a free radical mediation mode, the polysaccharide yield is effectively increased, and the activity of the polysaccharide is effectively improved; and then active oxygen free radicals (. OH) and active nitrogen free radicals (DPPH) are respectively used as indexes to preferably select the ganoderma lucidum polysaccharide-milk composition with the optimal synergistic interaction ratio, so that the antioxidant activity of the ganoderma lucidum polysaccharide is improved. The ganoderma lucidum polysaccharide-milk composition preferably selected by the method disclosed by the invention not only has the nutritional values of polysaccharide and milk, but also synergistically enhances free radical scavenging, oxidative stress resistance and aging resistance, so that high-quality utilization of ganoderma lucidum and milk is realized.

The application relates to the field of active nitrogen testing, and discloses a double-flow reactor experimental device for measuring active nitrogen emission and reaction rate, which comprises a reaction mechanism and an irradiation mechanism, the reaction mechanism comprises a first reactor, the outer surface of the first reactor is provided with a constant-temperature water layer, a second reactor is connected with the first reactor through a first connecting pipe, an ozone analyzer is installed on the first connecting pipe, and two dryers are installed on the first connecting pipe; the constant-temperature water layer outside the first reactor in the reaction mechanism can stably control the temperature and store soil samples; the second reactor is connected with the first reactor through the first connecting pipe and is used for particulate matter film samples; the ozone analyzer, an NOx analyzer and the dryers on the first connecting pipe can synchronously detect the concentrations of related gases, and the dryers can eliminate water vapor interference; the double-flow reactor experimental device solves the problem of measuring key parameters of active nitrogen under the background of farmland nitrogen application and nitrate pollution in urban groups, and has the advantages of synchronous analysis of multiple parameters, accurate simulation of environmental conditions, low-interference detection and the like.

The invention discloses a greenhouse soil culture device and method for combined determination of soil active nitrogen loss and greenhouse gas emission, and belongs to the field of farmland soil environment detection. The device comprises a soil culture column, an ammonia volatilization collecting cover and a greenhouse gas collecting cover, the ammonia volatilization collecting device is characterized in that the ammonia volatilization collecting cover is placed on the soil culture column to form a dynamic circulation chamber, and gas pipes are inserted through two round holes in the top of the ammonia volatilization collecting cover to filter ammonia gas in air and collect soil ammonia volatilization; a greenhouse gas collecting cover is placed on a soil culture column to form a greenhouse gas emission soil culture device, and two round holes in the top of the collecting cover are used for extracting soil greenhouse gas for emission and detecting the temperature in the device respectively; a plastic pipe is inserted into a round hole in the center of the bottom end of the soil culture column to collect the soil nitrogen leaching amount. The device is suitable for greenhouse soil culture experiments with complex factor interaction and large sample size, has hydrological nitrogen collection, and is beneficial to evaluation of the overall nitrogen loss of a soil system.

The present invention discloses a simplified method for recommending nitrogen fertilizer dosages for corn based on a nitrogen balance standard, relating to the field of agricultural resources and environmental technology. This method, based on a nitrogen balance standard, can recommend nitrogen fertilizer dosages for corn using only corn yield and soil fertility level. This method minimizes nitrogen surplus in the soil while ensuring crop yield, thereby reducing the environmental loss of active nitrogen and promoting high-yield, efficient, and sustainable agricultural development.

One aspect relates to a gold nanozyme containing glycol chitosan and gold particles, and a pharmaceutical composition containing the same for preventing or treating inflammatory bowel disease. It has been confirmed that the gold nanozyme according to one aspect and a composition containing the same suppress the expression of inflammatory factors, inhibit the production of intracellular reactive oxygen species (ROS) and reactive nitrogen species (RNS), and reduce the production of intracellular nitric oxide (NO). It has also been confirmed that when the gold nanozyme further contains glycyrrhizin, it inhibits the secretion of HMGB1 (High mobility group box 1). It has also been confirmed that the gold nanozyme and a composition containing the same restore the length and weight of damaged colon, making it suitable for use in the industry / market for the prevention and / or treatment of inflammatory bowel disease.

The invention discloses a multi-channel active nitrogen classification measurement system and method based on a high-precision cavity, and relates to the technical field of trace detection, micro-element analysis, atmospheric environment monitoring and high-precision cavities. A gas inlet module inputs sampled gas into a humidity control module, a pyrolysis module and a high-precision cavity measurement module; the sampling gas is ambient atmosphere or ambient atmosphere after filtering reaction gas; the humidity control module inputs the humidified gas into the pyrolysis module; the pyrolysis module comprises a plurality of pyrolysis units with different pyrolysis temperatures and is used for inputting directly sampled gas and humidified gas; the pyrolysis unit is used for performing pyrolysis separation on nitric acid and nitrate ester in the ambient atmosphere to generate nitrogen dioxide gas; all the gases are subjected to temperature control by the water bath heating module and then enter the high-precision cavity measurement module, and the concentration of nitrogen dioxide gas in each gas is measured by the high-precision cavity measurement module, so that the concentrations of different types of active nitrogen in the ambient atmosphere are obtained. The high-sensitivity measuring system and the high-sensitivity measuring method can accurately measure the concentration of different active nitrogen gases.

The present invention discloses a simplified method for recommending nitrogen fertilizer application rate for rice based on nitrogen balance criteria, which relates to the technical field of agricultural resources and environment. The present invention proposes a method for recommending nitrogen fertilizer application rate for rice based on nitrogen balance criteria. This method only needs to know the rice yield and soil fertility level to recommend the nitrogen fertilizer application rate. It can minimize the surplus of nitrogen in the soil to the greatest extent on the basis of ensuring crop yield, thereby reducing the environmental loss of reactive nitrogen, and thus promoting the high-yield, high-efficiency, sustainable and healthy development of agriculture.

The invention discloses a process for strengthening flotation of cuprite through nitrogen plasma surface reconstruction, which comprises the following steps of: crushing high-calcium and high-silicon cuprite, performing dry ball milling, and screening to obtain cuprite powder; the cuprite powder is evenly placed in a plasma reaction chamber, nitrogen is introduced, and high-activity nitrogen plasma selectively acts on the surface of cuprite; pulp mixing and sulfuration treatment: adding ultrapure water into the cuprite powder, uniformly stirring, then adjusting the pH value of the pulp, and then carrying out sulfuration treatment; and flotation separation and product collection are conducted, specifically, a collecting agent and a foaming agent are sequentially added into the cuprite ore pulp, flotation operation is conducted, and efficient separation of cuprite and gangue minerals is achieved. According to the method, selective surface reconstruction is conducted on the cuprite powder through the nitrogen plasma, the floatability difference between the cuprite and gangue minerals is enlarged, targeted strengthening of the vulcanization reaction activity and the adsorption capacity of the collecting agent is achieved, and the cuprite vulcanization flotation recovery rate and the concentrate Cu grade are improved.

The invention provides a method for removing smelly substances based on breakpoint chlorination, the method for removing smelly substances based on breakpoint chlorination is used for oxidative degradation of smelly substances, and the method comprises the following steps: S0, setting the initial concentration of smelly substances in a water body to be 10-100 ng / L; the method comprises the following steps: S1, adding ammonium sulfate into a water body containing odor substances; s2, free chlorine is added in the step S1 in a breakpoint chlorination mode, active species with oxidation capacity are generated in the breakpoint chlorination process, and the active species comprise hydroxyl free radicals, active chlorine free radicals and active nitrogen free radicals; and S3, fully stirring, uniformly mixing, reacting, and removing the odor substances through an oxidation-reduction reaction between the active species and the target pollutants, so that the odor substances, including geosmin and 2-methylisoborneol, in the water body can be rapidly degraded. The method for removing the odor substances based on breakpoint chlorination is efficient, economical and easy to operate, and has wide application prospects and remarkable social benefits.

This invention discloses a solution for inhibiting keloids and its preparation method. Physiological saline is treated with low-temperature atmospheric pressure plasma (CAP) to become activated saline. The activated saline contains a large amount of reactive oxygen species and reactive nitrogen species. After injection into the body, its active ingredients induce disulfide death in fibroblasts derived from keloids, thereby inhibiting keloid formation. Compared with existing methods for inhibiting keloids, this application has several unique advantages. First, the effect and degree of CAP activation on fibroblast life and death are dose-dependent, allowing for precise control of the effect. Second, the full spectrum of active species generated by CAP can synergistically act on multiple biological targets, reducing the risk of recurrence. Third, CAP is administered through the process of generating an activated solution from a liquid medium, enabling non-invasive or minimally invasive drug delivery and greatly reducing the risk of systemic toxicity. Finally, CAP technology avoids complex biological agent preparation processes, making it simpler to operate and lower in cost. This invention fills the gap in research on low-temperature atmospheric pressure plasma inhibition of keloids.

The invention belongs to the technical field of livestock and poultry manure management and utilization, and provides a method for realizing emission reduction synergy of production of padding, greenhouse gas and active nitrogen gas through rapid and safe fermentation of cow dung residues under a cold condition, and a heating plate is arranged at the bottom of a pile body to realize heating of cold air output from an aeration pipe at the bottom; and in combination with the ascending flow of the air flow in the pile body, the whole large pile body at the upper part can be effectively heated, and the high-temperature period lasts until the fermentation is finished, so that a good fermentation effect is achieved. Start-stop feedback control of the heating plate is realized by monitoring the temperature of the pile body, so that the energy consumption is effectively reduced, and the cost is greatly reduced. The method has the synergistic effects of promoting efficient and safe fermentation of excrement to produce padding and reducing emission of harmful gases in the environment under the cold condition in winter, is simple to operate, realizes efficient value-added utilization of wastes, and has important value and significance for solving the practical problems of excrement treatment and resource utilization in dairy farms.

The invention discloses a high-activity carbon nitride photocatalyst, a preparation method and application of the high-activity carbon nitride photocatalyst in photocatalytic self-Fenton degradation of pollutants in water without participation of iron circulation, and belongs to the technical field of photocatalyst preparation and environmental water remediation. According to the invention, urea and ethoxylated polyethyleneimine are self-assembled, and fused salt auxiliary calcination is combined to obtain the integrated porous flaky high-activity carbon nitride photocatalyst. The ultraviolet absorption edge of the photocatalyst has obvious red shift, which indicates that the light absorption range is widened; due to the existence of a strong built-in electric field, the separation and migration efficiency of photon-generated carriers is improved; the expanded specific surface area and abundant edge-NH2 indicate that active sites which are fully exposed exist. Finally, the hydrogen peroxide production rate of the photocatalyst reaches 14.9 mmol.g <-1 >. H <-1 >, which is 22.2 times that of CN; the efficient degradation of various pollutants is realized by constructing a photocatalytic self-Fenton system without participation of an iron cycle; the degradation rates of 10mg of the catalyst on 100mg L <-1 > of tetracycline, 10mg L <-1 > of sulfametronidazole, ofloxacin and diclofenac sodium respectively reach 100% (10min), 93% (60min), 100% (40min) and 100% (40min). The method is simple in process, low in preparation cost and safe to operate, and the prepared carbon nitride photocatalyst is high in activity, stable, high in universality and huge in application potential in the field of water pollution treatment.

Provided is a carbon antioxidant enzyme mimic, wherein a carbonyl group or an amine group, as a first functional group, and a hydroxyl group, as a second functional group, are bonded on a surface of the carbon antioxidant enzyme mimic. The carbon nanoparticle-based antioxidant enzyme mimic can effectively scavenge reactive oxygen species and reactive nitrogen species without metal ions. In addition, the carbon antioxidant enzyme mimic has an anti-inflammatory effect by reducing inflammatory cytokines and increasing the expression of natural antioxidant enzymes in cells.