57 results about "Oxidation Activity" patented technology

The present invention relates to a composition, a kit and a detection method for detecting hydrogen peroxide on the basis of self-biotinylation according to the peroxidation activity of a guanine quadruplex, and, more specifically, to a composition, a kit and a detection method for detecting hydrogen peroxide, the composition comprising: i) a guanine quadruplex-hemin complex (G-quadruplex-hemin complex); ii) biotinyl tyramide; and iii) a probe capable of binding to the guanine quadruplex.

The present application relates to a kind of anti-poisoning catalyst for blast furnace gas organic sulfur hydrolysis and its preparation method.Each component is as follows in percentage by weight: active component K2CO3 4-12%;Active component Cs2CO3 2-5%;Catalyst aid MoO3 3-8%;Catalyst aid La2O3 0.5-2%;Molding aid SiO2 1-5%;And composite metal oxide carrier Al2O3-TiO2 68-89.5%, the pore size of the composite metal oxide carrier Al2O3-TiO2 is three channel distribution.First, composite metal oxide carrier is prepared, and after being formed with silicon dioxide, active component and catalyst aid are impregnated to prepare catalyst.The catalyst prepared by the present application has excellent catalytic hydrolysis activity for organic sulfur in blast furnace gas, and has anti-sulfur, anti-chlorine and anti-oxygen poisoning performance and has persistent catalytic oxidation activity.

The present application relates to the technical field of non-noble metal catalysts, and provides a sulfur-doped cobalt-based material with a core-shell porous structure, which has Co nanoparticles as an inner core, and a porous carbon layer containing Co9S8 coated on the surface of the Co nanoparticles. The present application significantly enhances the catalytic capacity of the material by regulating the micro-morphology and surface active site composition and structure of the material through sulfur doping. On the one hand, the metal sulfide obtained by S doping improves the electrical conductivity of the catalyst, and on the other hand, the S element can regulate the microstructure and morphology of the material due to its strong reducing effect, so that S doping is beneficial to promoting the exposure of active sites and the diffusion of target molecule, thereby significantly enhancing the oxygen molecule activation efficiency and improving the benzyl alcohol oxidation activity and selectivity.

The application discloses a high-entropy cluster electrocatalyst and a preparation method and application thereof, and the high-entropy cluster electrocatalyst comprises a supported substrate of graphene oxide nanosheet and high-entropy clusters in a spinel configuration anchored on the surface of the graphene oxide, and the high-entropy clusters comprise a high-entropy spinel oxide structure composed of multiple metals, wherein the metals are more than five kinds of Co, Mn, Ni, Zn, Cu, Cr and Mg. The application realizes anchoring of the high-entropy oxide clusters on the surface of the graphene oxide, and the multi-component synergistic effect and the heterojunction charge optimization characteristics of the high-entropy oxide clusters improve seawater oxidation activity; the high-entropy stability characteristics and the strong carrier interaction promote the seawater oxidation stability of the catalyst, and the catalyst has better alkaline seawater oxidation performance.

This invention belongs to the fields of industrial hazardous waste resource utilization, photothermal synergistic catalytic materials, and VOCs treatment technology. Specifically, it relates to a VN / GaN aerogel photothermal catalyst based on in-situ vanadium nitridation of spent SCR catalyst, its preparation method, and its application. The preparation method includes: selectively leaching vanadium from spent SCR denitrification catalyst; using vanadium-containing DES leachate directly as a vanadium source and spinning aid, compounding it with gallium nitrate and the spinning aid to prepare an electrospinning precursor solution; obtaining precursor fibers through electrospinning; calcining in air to obtain V2O5 / Ga2O3 nanofibers; high-temperature nitriding with ammonia to form VN / GaN composite nanofibers; and ultrasonic dispersion, aging, and freeze-drying to prepare the aerogel photothermal catalyst. This invention achieves green, high-value, closed-loop utilization of vanadium in hazardous waste, and the prepared aerogel catalyst possesses both excellent photothermal conversion performance and toluene catalytic oxidation activity.

This invention provides a titanium dioxide supported catalyst with titanium vacancies, its preparation method, and its application. The preparation method includes the following steps: (1) mixing titanium dioxide raw material with a fluorine-containing etchant and performing etching treatment; separating the resulting mixture into solid and liquid components; and heat-treating the resulting solid to obtain a titanium dioxide support rich in titanium vacancies; (2) mixing an active metal precursor solution with the titanium dioxide support to load the active component; and activating the solid obtained after solid-liquid separation to obtain a titanium dioxide supported catalyst. This invention provides a simple, low-cost, and easily scalable HF etching method for preparing anatase supports rich in titanium vacancies, thereby obtaining a Pd-based catalyst that possesses ultra-high room temperature formaldehyde oxidation activity requiring only room temperature treatment.

This invention discloses a two-dimensional layered ammonia oxidation catalyst based on MXene, its preparation method, and its application in low-temperature ammonia fuel cells. The catalyst comprises an active component and a support. The active component is one or two of the transition metals Pt, Ir, and Pd, and the support is accordion-shaped MXenes. The catalyst support prepared by this invention has a large specific surface area, in which the transition metal nanoparticles are uniformly dispersed and have strong interactions with the MXenes, which can significantly improve its ammonia electrocatalytic oxidation activity, showing good application prospects in ammonia fuel cells.

The application discloses a modified silane coupling agent and a preparation method thereof, an anti-yellowing dealcoholized sealant and application thereof, and a preparation method of the anti-yellowing dealcoholized sealant. The preparation method of the anti-yellowing dealcoholized sealant comprises the following steps: A100, carrying out dehydration homogenization treatment on alpha, omega-dihydroxypolydimethylsiloxane, dimethyl silicone oil and a filler under a vacuum condition to obtain a first base material; A200, blending and treating a part of a crosslinking agent and the first base material under the vacuum condition to obtain a second base material; A300, providing a modified silane coupling agent, blending and treating another part of the crosslinking agent, the modified silane coupling agent and a catalyst under the vacuum condition to obtain the anti-yellowing dealcoholized sealant. The modified silane coupling agent is prepared by blending a silazane compound with a trimethylsilyl group and a silane compound with a primary amino group and a hydrolysable silicon functional group, which is favorable for reducing the amino oxidation activity and thus improving the ultraviolet resistance, thermal oxygen aging capacity and storage stability of the anti-yellowing dealcoholized sealant.

The application discloses a method for preparing 2,5-furan dicarboxylic acid, which comprises the following steps: adding CuO foam catalyst, an aqueous solution of tap water disinfectant and pentahydroxymethyl furfural into an alkaline solution to react and obtain 2,5-furan dicarboxylic acid; the CuO foam catalyst is obtained by calcining foam copper at 200 DEG C to 250 DEG C under an oxygen-containing atmosphere. The method for preparing FDCA by adopting the whole CuO foam catalyst solves the problems of difficult catalyst recovery and separation and serious catalyst waste in the above problems, and has the advantages of high oxidation activity agent stability, mild reaction condition and easy operation.

The application discloses a kind of electric field reinforced catalytic aldehyde removal control methods for formaldehyde efficient removal, it is related to formaldehyde removal technical field, in the purification reactor, pre-adsorption activated carbon block and deep oxidation activated carbon block are oppositely arranged, and opposite reaction cavity is formed between the two;First noble metal catalyst layer and second noble metal catalyst layer are respectively arranged on the surface of pre-adsorption activated carbon block and deep oxidation activated carbon block towards opposite reaction cavity, and activation catalytic reaction zone and mineralization catalytic reaction zone are formed along the flow direction of formaldehyde-containing gas;Through pulse DC power supply, electric field reinforced zone under pulse corona discharge state is formed in opposite reaction cavity, formaldehyde-containing gas is sequentially completed activation and deep oxidation in activation catalytic reaction zone and mineralization catalytic reaction zone after pre-enrichment, can improve formaldehyde removal rate and carbon dioxide selectivity, reduce intermediate product accumulation, and improve continuous operation stability.

The invention discloses a sulfur-resistant CO oxidation catalyst and a preparation method thereof. The catalyst is composed of a date-pit-shaped polycrystal phosphate nanofiber carrier and a noble metal active component loaded on the crystal face at the end of a date pit, the date-pit-shaped polycrystal phosphate nanofiber carrier is formed by one or more of hydroxyl calcium phosphate, iron phosphate or aluminum phosphate, and the noble metal active component is at least one of Pt, Pd, Au and Ru. The preparation method comprises the following steps: in the presence of a polyol surfactant, carrying out periodic oscillation crystallization-segmented calcination to obtain a date-pit-shaped polycrystalline carrier, and directionally anchoring the noble metal on the crystal face at the end part of the carrier through ion exchange. The catalyst prepared by the invention shows excellent CO oxidation activity, sulfur poisoning resistance and long-term stability in sulfur-containing industrial flue gas such as steel sintering flue gas, and is suitable for working conditions of 200-350 DEG C and containing pollutants such as SO2.

The invention discloses a preparation method of a high-entropy oxide, and belongs to the technical field of limited space peculiar smell treatment. The method comprises the steps that PVP is dissolved in deionized water, the mass ratio of PVP to deionized water is 0.03: 1-0.15: 1, and a PVP solution is obtained; dissolving soluble salt in the PVP solution, and uniformly mixing to obtain a mixed solution A; adding citric acid into the mixed solution A, and uniformly mixing to obtain a mixed solution A '; the mixed solution A'is subjected to dehydration treatment and calcination, so that the high-entropy oxide is successfully prepared, the method is simple in preparation process and low in equipment requirement, the prepared high-entropy oxide is of a stable fluorite configuration and a two-dimensional porous structure, the specific surface area is as high as 98.7 m < 2 > / g, the pore volume is 0.12 cm < 3 > / g, the average pore size is centrally distributed at 4.7 nm, and the high-entropy oxide has good H2S catalytic oxidation activity and stability and is suitable for industrial production. The catalytic oxidation activity is high; the sulfur capacity is large. Meanwhile, the invention also discloses application of the preparation method in removal of low-concentration hydrogen sulfide.

The invention belongs to the field of electro-catalysis, and particularly relates to a catalytic electrode capable of being regenerated repeatedly, and a preparation method and a regeneration method thereof. The method comprises the following steps: 1) pretreating a titanium substrate, and then depositing a nickel layer on the surface of the titanium substrate to obtain a Ni-Ti precursor; and 2) respectively placing the Ni-Ti precursor and selenium powder in a protective atmosphere, heating and calcining, and carrying out vapor deposition treatment to obtain the catalytic electrode capable of being regenerated for multiple times. The catalytic electrode has good urea oxidation activity and also has stability in urea of a high-concentration medium, a double-layer structure is formed on the surface of the catalytic electrode, and in the working process of a high-concentration alkaline urea solution, an outer layer Ni3Se4 phase is continuously reconstructed, so that long-term stability of the catalytic electrode under severe working conditions is guaranteed, and the catalytic electrode has a wide application prospect. And the method has good renewability.

The invention discloses an xK / Pt / Al2O3 catalyst for a low-temperature NH3-SCO reaction as well as a preparation method and application of the xK / Pt / Al2O3 catalyst, and belongs to the technical field of air pollution control. The preparation method comprises the following steps: by taking platinum nitrate and aluminum oxide as raw materials, carrying out primary drying and calcining after adopting an initial wet impregnation method to prepare a Pt / Al2O3 precursor; and loading a potassium nitrate solution into the Pt / Al2O3 precursor by a wet impregnation method, and carrying out secondary drying and calcination to obtain the xK / Pt / Al2O3 catalyst. The Pt / Al2O3 catalyst is modified by alkali metal potassium, and the state of Pt is regulated and controlled through interaction between K and Pt, so that the low-temperature NH3 oxidation activity of Pt / Al2O3 is remarkably improved; the NH3 removal rate of the prepared xK / Pt / Al2O3 catalyst at 125 DEG C can reach 20%, the NH3 conversion rate at 150 DEG C can reach 55%, and the xK / Pt / Al2O3 catalyst has wide application prospects.

The invention discloses an organic carbon source modified multifunctional metal oxidizing agent FeMn as well as preparation and application thereof. The preparation method comprises the following steps: carrying out step-by-step hydrothermal reaction on a mixed solution containing an iron-based metal precursor, a manganese-based metal precursor and an organic carbon source; and roasting a product obtained by the hydrothermal reaction to obtain the organic carbon source modified multifunctional metal oxidant FeMn. According to the invention, Fe and Mn composite metal oxide is taken as an active component, soluble sugar is introduced, a carbonization process of the soluble sugar and a crystallization process of the active component in a hydrothermal process are combined, a step-by-step hydrothermal mode is adopted, the monolithic catalyst with colloidal carbon wrapped by the metal oxide is constructed, and then the roasting atmosphere type is adjusted, so that the metal oxide-coated colloidal carbon is obtained. Similarly, a monolithic catalyst with a controllable internal cavity is formed. The preparation method of the catalyst is simple, the used raw materials are cheap and easy to obtain, the catalyst is easy to popularize, and the catalyst shows excellent low-temperature oxidation activity on different aromatic VOCs.

The invention discloses a nano staggered skeleton WC / CNF-CNT, a Pt / WC / CNF-CNT composite material as well as preparation and application of the nano staggered skeleton WC / CNF-CNT composite material. The WC / CNF-CNT and Pt / WC / CNF-CNT composite material with the nanometer staggered framework is obtained through a simple process, the process is short, the operation is simple, the reproducibility is good, and the single yield is high. The invention provides an application of the WC / CNF-CNT composite material or the Pt / WC / CNF-CNT composite material as an electrocatalyst for an electrochemical hydrogen evolution reaction, an electrochemical oxygen reduction reaction or an electrochemical glycerol oxidation reaction, and provides an electrode prepared by using the composite material as the electrocatalyst. The hydrogen evolution activity, the oxygen reduction activity, the glycerol oxidation activity and other reaction performances are enhanced.

The application belongs to the technical field of automobile exhaust purification catalytic materials, and particularly relates to a kind of oxygen defect Pt (111 / 200) composite crystal face atomic level PtM supported rod-shaped La-Al2O3 catalytic materials and its preparation method and application, wherein the catalytic material includes carrier and its supported active ingredient, the carrier is rod-shaped La-Al2O3;Active ingredient is atomic level PtM composite material, Pt and M in it exist in the form of nano-particle, single atom, diatomic and few atom cluster;And Pt exists 111 and 200 composite crystal face;M includes at least one of Pd, Co, Mn and Cu;The carrier and / or active ingredient has oxygen defects.The catalyst improves the molecular activation capacity, low-temperature catalytic oxidation activity and anti-aging stability, and can improve the automobile exhaust catalytic oxidation treatment effect.

The invention belongs to the technical field of agricultural microorganisms, and particularly relates to bacillus with elemental selenium oxidation activity and a plant salt tolerance improving function and application of the bacillus. The strain disclosed by the invention is bacillus subtilis, and is named as bacillus subtilis LH10 by the inventor, and the preservation number of the bacillus subtilis LH10 is GDMCC 67460. The bacillus subtilis disclosed by the invention is used for preparing a microbial agent or a microbial organic fertilizer with both selenium enrichment and salt tolerance, so that a green, environment-friendly and safe method is provided for microbial remediation in selenium-poisoned areas and plant selenium enrichment in selenium-deficient areas. The strain can oxidize elemental selenium Se (0) into sodium selenite (Se (IV)), and meanwhile, the salt tolerance of plants can be improved. Therefore, the strain not only can be used as a mode material for studying elemental selenium metabolism conversion, but also can be used as an excellent functional fungicide for improving selenium enrichment and salt tolerance of crops, and is an ideal material for studying microbial fertilizers.

The application belongs to the technical field of soil treatment and sewage treatment, and particularly relates to application of 5-methylisoxazole nitrification inhibitor and a method for inhibiting nitrification. The application comprises application in inhibiting nitrification activity of ammonia-oxidizing bacteria and in inhibiting nitrification activity of nitrite-oxidizing bacteria. Through a large number of researches and experiments, the application finds nitrification inhibition activity of 5-methylisoxazole, and realizes full-path regulation of nitrification. Experiments show that the compound can inhibit ammonia oxidation activity of a typical nitrifying strain at a low dose (>=0.01‰w / v), and can effectively inhibit activity of nitrite-oxidizing bacteria at a concentration lower than 0.1‰m / v. The aqueous solution of the compound has a neutral pH, and has no significant inhibitory effect on non-target heterotrophic microorganisms, and has high selectivity and environmental friendliness.

The invention discloses an N-doped auxiliary agent modified TiO2 loaded Pt-based CO oxidation catalyst and a preparation method thereof, and belongs to the field of environmental engineering. The catalyst comprises a carrier, an N-doped auxiliary agent and an active component, the carrier is TiO2, the N-doped auxiliary agent is N-doped MoO3 and / or WO3, and the active component is Pt. The preparation method comprises the following steps: (1) loading an auxiliary agent MoO3 and / or WO3 on a TiO2 carrier to obtain an auxiliary agent modified carrier; (2) placing the auxiliary agent modified carrier in a tubular furnace, and carrying out heat treatment in NH3 / N2 mixed gas to obtain an N-doped auxiliary agent modified carrier; and (3) loading Pt on the N-doped auxiliary agent modified carrier, so as to obtain the N-doped auxiliary agent modified TiO2 loaded Pt-based CO oxidation catalyst. The obtained catalyst has good low-temperature CO oxidation catalysis activity and sulfur poisoning resistance, and can be used for removing CO in tail gas of steel sintering, coking, boilers and the like.

The invention discloses a preparation method of a WO3-CeO2 modified USY molecular sieve encapsulated Pt-Pd bimetallic CO oxidation catalyst and the catalyst. The preparation method of the WO3-CeO2 modified USY molecular sieve encapsulated Pt-Pd bimetallic CO oxidation catalyst comprises the following steps: synthesizing USY zeolite; the method comprises the following steps: packaging a Pt-Pd cluster through USY zeolite, so as to obtain a Pt-Pd (at) USY intermediate; carrying out coprecipitation on WO3 and CeO2, and adding the WO3 and CeO2 into the Pt-Pd (at) USY intermediate, so as to obtain a first mixture; and roasting and activating the first mixture, so as to obtain the Pt-Pd (at) USY-WO3-CeO2 catalyst. According to the preparation method disclosed by the invention, the USY space confinement effect is utilized to avoid surface exposure of the active components and enhance the sintering and poisoning resistance, and CeO2 and WO3 are utilized to improve oxygen storage and sulfur and water resistance, so that the catalyst has high CO oxidation activity, excellent stability and antitoxic ability.

The application discloses a high-toughness composite glass substrate and a preparation method and application thereof. The composite glass substrate comprises a glass base and metal particles; the mass fraction of the metal particles is 1-20%; the metal particles comprise metal particles with two or more parameter specifications, the parameter specifications comprising a specific surface area parameter and an oxidation activity parameter. According to the embodiment of the application, oxidation of the metal additive can be avoided, and the toughness of the glass is improved.

The invention belongs to the technical field of biological application, and particularly discloses a polypeptide with anti-freezing and antioxidant activity and application thereof. The amino acid sequence of the polypeptide is APDPYR, and experimental data shows that after a harsh cold chain environment (through four times of repeated freezing and thawing cycles) is simulated, the residual activity of an experimental group added with the polypeptide still reaches 68.43%, and an excellent biomacromolecule stabilizing effect is shown. The natural bioactive peptide not only has the physical anti-freezing capability of inhibiting ice crystal recrystallization, but also has the function of scavenging free radicals, avoids the antagonism among components in a complex formula, simplifies the production process, is safe and non-toxic as a natural bioactive peptide, and avoids rejection of consumers on synthetic food additives (such as phosphate).

The application discloses a preparation method and application of a silicon-doped iron oxide-based ammoxidation catalyst with high N2 selectivity, and belongs to the field of ammoxidation catalysts. The catalyst is prepared by an ethanol solvent-assisted ammonia water-coprecipitation method, which can significantly improve the N2 selectivity while maintaining the ammoxidation activity of the iron oxide catalyst. The silicon doping of the iron oxide can be realized through a simple catalytic synthesis method, and an amorphous iron-silicon composite oxide catalyst is obtained. The novel iron-silicon composite oxide catalyst has the characteristics of large specific surface area and many acid sites, and exhibits good activity and superior N2 selectivity in the ammoxidation reaction. The catalyst can solve the ammonia escape problem of an ammonia selective catalytic reduction (NH3-SCR) module in a diesel vehicle exhaust aftertreatment system, realize efficient oxidation of ammonia, and reduce the generation of nitrogen oxides, and has a wide industrial application prospect.

The application discloses a Y2O3-ZrSi2-ZrB2-SiC composite ceramic coating based on low-energy self-heating technology and combined with bionic glass film for synergistic oxygen resistance, and the coating comprises a base layer, a transition layer and a bionic glass layer. Compared with the prior art, the application has the advantages that the application overcomes the problems of existing ZrB2-SiC ceramic coating system, such as oxidation structural defect, high oxygen permeability, and the like. The application reduces oxidation activity and oxidation consumption, improves service temperature, has the advantages of strengthening oxidation protection effect and prolonging working life. After oxidation at 1700 DEG C for 100 min, the cumulative antioxidation protection efficiency is 99.809%, the carbon loss rate is 1.032%, and the application has the effect of stable oxygen resistance protection at 1700 DEG C.

The invention provides a method for preparing formaldehyde and hydrogen through photocatalytic conversion of methanol, and belongs to the technical field of formaldehyde and hydrogen preparation. The method for preparing formaldehyde and hydrogen through photocatalytic conversion of methanol comprises the following steps: under a closed oxygen-free condition, mixing a methanol aqueous solution and a photocatalyst, placing the mixture under an ultraviolet light source, and carrying out photocatalytic methanol dehydrogenation to generate formaldehyde and hydrogen so as to prepare formaldehyde and hydrogen, the photocatalyst is anatase-phase titanium dioxide {001} nanocrystalline loaded with platinum nanoparticles on the surface, and the average size of the platinum nanoparticles is 2-6 nm; the volume ratio of methanol to water in the methanol aqueous solution is (90-60): (10-40). The method can realize directed conversion of methanol under mild conditions, effectively improve formaldehyde selectivity and hydrogen production activity, inhibit side reactions such as formaldehyde over-oxidation and active site poisoning, and has the advantages of mild reaction conditions, simple operation and low pollution gas emission.

This invention belongs to the field of microbial fermentation engineering technology, specifically relating to a method for targeted screening of superior strains of *Candida virescens* producing long-chain dicarboxylic acids. Targeted screening is achieved through a dual-pressure approach: first, long-chain alkanes are used as the sole carbon source to screen for strains with dominant ω-oxidation activity; then, these strains are transferred to a late-stage dicarboxylic acid conversion fermentation broth containing norlesin, after the removal of alkanes and cell bodies. This fermentation broth simulates a high product concentration, high osmotic pressure, and complex inhibitory environment, allowing for reverse screening of strains with weak β-oxidation capacity and strong production tolerance. This invention utilizes the production fermentation broth as the screening medium, overcoming the technical bias of traditional methods where the screening environment is disconnected from actual production conditions. The screened strains exhibit high yields and strong production adaptability.

The present invention is directed to a composition and a method for treating a mammal exhibiting an inherited mitochondrial disease. That method comprises administering a pharmaceutical composition containing a mitochondria-treating effective amount of PEG-OAC nanozymes, DEF-OAC-PEG nanozymes or both nanozymes dissolved or dispersed in a physiologically tolerable diluent. In that composition, PEG is an acronym for a reacted alpha-amino-omega-methoxy-poly(ethylene glycol) substituent, OAC is an acronym for oxidized activated charcoal particle, and DEF is an acronym for a reacted deferoxamine substituent. Both of the PEG and the DEF substituents are each covalently bonded to the OAC particle by the primary amino group on each.

The invention discloses an adsorption method for directionally trapping palladium by activated carbon in a strong-acidity high-chlorine medium, and relates to the technical field of additive manufacturing, the method comprises the following specific steps: firstly, carrying out oxidation pretreatment on original activated carbon to obtain oxidized activated carbon; then preparing a pH / Cl double-response intelligent adsorbent and three functional systems; adjusting the acidity of the palladium-containing strong acid solution to obtain a to-be-adsorbed solution; corresponding adsorbents are added in proportion, and intelligent directional adsorption and enhanced separation are achieved in different modes; finally, the adsorbent is desorbed and regenerated with a specific solution, and cyclic utilization is achieved. By preparing the multifunctional intelligent adsorbent and constructing a differentiated functional system, palladium in a strongly acidic high-chlorine medium is directionally and efficiently captured, and the bottleneck of the traditional technology is broken through; an efficient desorption regeneration process is also constructed, so that the adsorbent is recycled, and the cost is reduced; the technology gives consideration to resource recovery and environmental protection, promotes upgrading of the precious metal recovery industry, and has remarkable economic and environmental benefits.

The invention discloses a peptide APRP with antihypertensive and antioxidant activity and a preparation method and application thereof, and belongs to the technical field of food science and biology. According to the invention, the short peptide APRP (the sequence is Ala-Pro-Arg-Pro) with potential antihypertensive activity is screened out, the peptide APRP has remarkable ACE inhibitory activity, the half inhibitory concentration (IC50) of the peptide APRP is 0.2892 mM, and the inhibition rate of the peptide APRP in an HK-2 cell model under the concentration of 1nM is as high as 72.85%. Molecular docking results show that APRP is stably combined with an ACE active center through hydrogen bonds, salt bridges and hydrophobic interaction, and conversion of angiotensin I is effectively blocked. The polypeptide APRP also has antioxidant activity, the DPPH free radical scavenging capacity reaches 9.14%, and the hydroxyl free radical scavenging rate reaches 5.1%. The invention provides a new candidate molecule for natural treatment with hypertension and oxidation resistance at the same time.