65results about How to "Broad prospects for commercial application" patented technology

The invention discloses a Fe-Co-P-C amorphous electro-catalyst for an efficient hydrogen evolution reaction and a preparation method thereof. The Fe-Co-P-C amorphous electro-catalyst for the efficient hydrogen evolution reaction is characterized in that the electro-catalyst is a Fe-Co-P-C amorphous alloy strip, components of the electro-catalyst are Fe(80-x)CoxP(20-y)Cy, 0<=x<=50, 0<=y<=15, and x and y are correspondingly the atomic percent of Co and the atomic percent of C in the Fe-Co-P-C amorphous alloy strip. The Fe-Co-P-C amorphous electro-catalyst is prepared by adopting a melt rotary quenching method, the preparation method is simple, easy to operate, low in cost and friendly to environment, the whole preparation process does not need special equipment, large-scale industrial production can be achieved, and the quality of the obtained alloy strip is high; and according to the prepared Fe-Co-P-C strip through the preparation method, the advantages of being good in conductivity, large in number of active sites, high in electro-catalytic performance and the like are achieved simultaneously, and the Fe-Co-P-C amorphous electro-catalyst is a hydrogen evolution electro-catalytic material which has the wide industrial application prospect.

The invention provides a preparation method of a carbon-coated transition metal nano hollow particle. The method comprises the following steps: based on a Kirkendall effect, carrying out dissolving and mixing, high temperature co-pyrolysis and insulation in-situ reduction on an aromatic hydrocarbon compound with oxygen-containing groups and a transition metal compound so as to obtain the carbon coated metal nano hollow particle. The hollow structure shell layer prepared by the method consists of carbon and a nano metal composite material; and the nano particles are evenly distributed, the diameter range of the nano particle is 20nm-80nm, and the thickness of the carbon-coated layer is 2.2nm-4.3nm.

The invention discloses a preparation method of a ZnCo2O4 nano-plate serving as a lithium ion battery negative electrode material. The preparation method comprises the steps of carrying out basic hydrolysis on zinc salt and cobalt salt according to the molar ratio of 1 to 2 in a hydrophilic solvent by virtue of an alkaline reagent under the microwave irradiation induction to generate a metal hydroxide or hydrocarbon precursor, and then carrying out low-temperature heat treatment to obtain a two-dimensional ultrathin ZnCo2O4 nano-plate to be used as the lithium ion battery negative electrode material finally. With the adoption of the preparation method, as the ZnCo2O4 nano-plate serving as the lithium ion battery negative electrode material is synthesized with the assistance of microwaves, the preparation process is simple, the cost is low, the reaction condition is mild, special equipment is not needed in the whole reaction process, the quality of the product which is finally obtained is high, and the morphology and the size of the product are uniform; when being used as the lithium ion battery negative electrode material, the ZnCo2O4 nano-plate shows good electrochemical performance, can be used for well solving the problems of serious capacity fading, stable long-term circulation and low rate performance of the transition metal oxides and is an ideal lithium ion battery negative electrode material which has wide commercial application prospect.

The invention provides a red light quantum dot as well as a synthesis method and a quantum dot light emitting diode thereof. The synthesis method comprises the following steps: S1, providing a solution with a CdSe quantium dot core; S2, carrying out epitaxial growth on the CdSe quantium dot core so as to obtain a plurality of ZnxCdl-xS single-layer shells, gradually increasing x of different ZnxCdl-xS single-layer shells from 0 till a maximum number within of 0.5-0.8 in a direction far away from the CdSe quantium dot core so as to obtain a system with CdSe / ZnxCd1-xS quantum dots; and optionalS3, continuously coating the CdSe / ZnxCd1-xS quantum dots of the step S2 with a ZnS shell layer. By controlling the components in the shell layers to be gradually transited to CdZnS or ZnS from CdZnS,a good lattice matching rate can be ensured, the quantum dots can be maintained at a single index dispersion level, and the quantum dots with high optical quality, high photobleaching resistance and high air stability can be finally prepared.

The invention relates to a shiitake mushroom fresh-keeping method combining pretreatment by coating and ozone with microporous membrane modified atmosphere packaging, which is specialized in spoilage control and quality maintenance in the process of packaging, storing and transporting for the picked shiitake mushroom. The invention belongs to a field of fruit and vegetable preserving and storing technique, which is characterized in that: fresh shiitake mushroom raw material without rottenness and maturity is selected; the shiitake mushroom is dried with air after being rinsing out the impurities as silt, etc., on the surface; the shiitake mushroom after the ozone water treatment is dealt with coating in chitosan solution, dried and then placed in a polypropylene tray for enveloping and packaging with microporous membrane and storing in a temperature of 0-5 DEG C. The invention can effectively reduce the number of bacteria on the product surface and the product respiration rate, effectively control the gas concentration and relative humidity in the package, reduce the spoilage rate of the product, ensure the editable safety of the product and lengthen the shelf life of the product.

The invention discloses a stirring heating device capable of tracking the maximum wind energy utilization rate. The stirring heating device comprises a wind turbine, a gearbox, a heating device, a circulating pump, a heat exchanger and a stirring working medium. The stirring heating device is characterized in that signals collected by a wind speed sensor and a rotation speed sensor are input to aprogrammable logic controller (PLC) to be processed, then, output signals control a motor to drive the circulating pump, and the stirring working medium is conveyed from the heat exchanger to the heating device; the rotation speed of the wind turbine under the operation working condition is adjusted in real time, the utilization section of the wind speed is broadened, the wind turbine can operateat the optimal tip speed ratio under various wind speeds, and the maximum wind energy utilization rate is achieved through the wind energy stirring heating device; and the wind energy resource is effectively utilized, and the stirring heating device has important theoretical and engineering practical significance to sufficient and efficient wind energy utilization and has wide commercial prospects.

The invention discloses a preparation method of methylamine lead iodine-reduced graphene oxide composite photocatalytic material and an application in photocatalytic hydrogen production by using the photocatalytic material. CH3NH3PbI3 is synthesized by a liquid phase reaction method, a saturated solution of the CH3NH3pBI3 is prepared, graphene oxide GO is added, and the methylamine lead iodine-reduced graphene oxide composite photocatalytic material is obtained by photo-reduction and light compounding. The method is simple and easy to operate, and the synthesized methylamine lead iodine-reduced graphene oxide composite photocatalytic material has excellent photocatalytic hydrogen production activity and stability, and has a wide application prospect in the aspect of photocatalytic hydrogenproduction.

The invention provides an application of alicyclic amine, such as octadecylamine, cetylamine, tetradecy lamine and dodecylamine, in thermal equipment operation cleaning as a cleaning agent. The invention further provides an application of a mixture of any two or three or four components selected from octadecylamine or cetylamine or tetradecy lamine or dodecylamine at random mass ratio in thermal equipment operation cleaning as a cleaning agent. According to the invention, insoluble peeling descaling replaces soluble descaling, thus not dissolving and corroding metal, eradicating the harm of traditional cleaning technologies to equipment and accomplishing the production mode of cleaning thermal equipment during operation, protecting during cleaning and efficiently operating during protection. Powder units are always in cleaning state, therefore making powder units to operate safely and stably and reaching the purpose of energy saving and emission reduction. The cleaning agent provided by the invention is a grate breakthrough in traditional cleaning technologies. In addition, the medicine addition condition of using octadecylamine as a thermal equipment outage anticorrosion protective agent is changed, the film forming quality and anticorrosion effect are guaranteed, and the function of outage anticorrosion is reinforced.

The invention discloses a hot air and MeJa compounded treatment refreshing method of a loquat fruit, which is specially used for protecting the picked loquat fruit from cold damage in the storage and transportation process and maintaining the quality to prolong the shelf life of the product. The technology comprises the following steps of: placing the sorted and pre-cooled loquat fruit into an airtight container with certain volume; and suffocating the loquat fruit with 15-20 micro-mol / LMeJA for 6 hours in 38 DEG C hot air. The compounded treatment refreshing method can obviously inhibit the picked loquat fruit from cold damage and quality deterioration, and the fruit subjected to the compounded treatment is not suffered from the cold damage after being stored for 35 days at 1 DEG C, while the contrast fruit which is not treated appears the obvious symptom of cold damage after being stored for 21 days. The hot air and MeJa compounded treatment refreshing method has the comprehensive advantages of separate heat treatment and separate MeJA treatment, and the used MeJA is a natural grown regulating substance in the plant, has the characteristics of no toxicity, no residues and the like, and can ensure the edible security of the fruit.

The invention discloses a loquat fruit preservation technology through nano packaging compound plant essential oil treatment, specially used for rot control and quality maintenance in a normal temperature storage process after loquat fruits are picked in the south, so as to prolong a storage period of product. According to the technology, a nano titanium dioxide low-density polyethylene preservative film is adopted and carvacrol essential oil with proper concentration is used for treatment to store the loquat fruits at temperature of minus 20 DEG C, so that the preservation life is prolonged to more than 15 days. The preservation technology disclosed by the invention significantly inhibits rot of the picked loquat fruits to keep good eating quality. The carvacrol essential oil, as a secondary metabolism product of plant, is low in working concentration so as to guarantee eating safety of the fruits. The nano thin film packaging has the advantages of being efficient, safe, convenient to use and the like.

The invention discloses a Fe-Co-Mo-P-C series amorphous alloy electrocatalyst as well as a preparation method and application thereof. The ingredient of the Fe-Co-Mo-P-C series amorphous alloy electrocatalyst is FexCoyMo<80-x-y>P<20-z>Cz, wherein x, y and z are the atomic percentages of the Fe element, the Co element and the C element, x is no less than 10 and no greater than 40, y is no less than10 and no greater than 40, and z x is no less than 0 and no greater than 15. The Fe-Co-Mo-P-C series amorphous alloy electrocatalyst is prepared through the melt rotary quenching method, has high vitrification forming ability and electrocatalytic activity within the wider ingredient range, is an excellent hydrogen evolution reaction electrocatalyst and has wide commercialization application prospect.

The invention relates to a compound strawberry cold-air pre-cooling preservation technique based on short wave ultraviolet irradiation, and the technique is specially used for rot control and quality retention of the post-harvested strawberries in the storage process so as to reduce the rot diseases of the strawberries and prolong the storage and service lives. By adopting short wave ultraviolet irradiation combined with a cold-air quick pre-cooling manner, the storage period of the fresh strawberries can be obviously prolonged. If fresh strawberries are refrigerated at 5 DEG C, the storage lives of fresh strawberries can reach over 12 days. The preservation technique provided by the invention is used for obviously inhibiting rot of the post-harvested strawberries, so that good edible quality and nutritional quality are maintained. The short wave ultraviolet irradiation as a physical cold sterilizing technique has the characteristics of being quick to sterilize, environmental-friendly, safe to eat and the like. The field heat of the strawberries can be quickly removed by combining cold-air quick pre-cooling, thereby playing a good guarantee foundation for refrigeration and cold-chain transportation. Short wave ultraviolet irradiation combined with compound cold-air pre-cooling is suitable for storing and circulating the fresh strawberries, so that the technique has relatively good application value.

A high-oxygen antistaling packing technique for red bayberry includes such steps as choosing fresh red bayberry, precooling, loading them in antistaling bags made of air-tight composite film, filling high-purity (100%) O2 and sealing. Its antistaling time can reach more than 9 days.

The invention discloses a high-yield linear-chain glucan strain and a glucan fermentation and production method thereof. The high-yield linear-chain glucan strain is named Leuconostoc citreum N21. Thehigh-yield linear-chain glucan strain is separated from dried milk curds made by indigenous herdsmen in Xilin Gol League of Xilinhot City of Inner Mongolia, and an experiment discovers that the high-yield linear-chain glucan strain is capable of generating EPS (Exopolysaccharides) having good characteristics. The glucan fermentation and production method comprises the following steps: inoculatingthe Leuconostoc citreum N21 to an MRS basic culture medium containing 5 percent of sucrose, and culturing for 36 to 72 hours under the conditions that the pH (Potential of Hydrogen) value of an initial culture medium is 6 to 8, the temperature is 25 to 37 DEG C and the shaking speed is 0 to 170 rpm (Revolutions Per Minute), thus obtaining a fermentation solution; purifying crude polysaccharide, thus obtaining the EPS. The high-yield linear-chain glucan strain and the glucan fermentation and production method, disclosed by the invention, have the advantages of short EPS production period, highEPS yield, safety and no toxic and side effects; the EPS is higher in solubility, emulsibility and heat stability, theoretical foundation and basis are provided for industrial application, and a widecommercial application prospect is obtained.

The invention discloses a method for producing emulsion or bubbles by a microfluidic chip. The method comprises the following steps: (1) drawing a microfluid pipeline graph by a two-dimensional planeby using engineering drawing software AutoCAD or Clewin5; (5) printing a pipeline template on a transparent plastic thin film, and etching a photocureable polymer SU-8 by using an ultraviolet light etching technology to prepare a reverse mold on a silicon wafer, wherein the pipeline is black, and the rest part is still the transparent plastic thin film; (3) placing the reverse mold into an open culture dish or a glass dish, uniformly mixing polydimethylsiloxane with a curing agent according to a ratio of 10 to 1, carefully pouring the mixture onto the reverse mold according to a requirement ofenable the thickness of the polydimethylsiloxane to be about 3 to 5 mm, placing the reverse mold into a baking oven at 70 DEG C for heating for 1 h, and curing the polydimethylsiloxane; (4) breakingthe mold to obtain a cured microfluid pipeline, and bonding the microfluid pipeline with a glass substrate by using an ultraviolet plasma method to obtain the microfluidic chip; and (5) producing theemulsion or the bubbles by using the microfluidic chip.

The invention discloses a power saving method for weight length interval, the method comprising following steps: (1)a management frame interaction is formed between a local side and a terminal, the local side obtains weight length interval parameters of the terminal; (2)the terminal dormancy starts, the local side will not allocate receive-send slot time to the terminal; (3) the terminal stops dormancy and stays in a working state, and normal data interaction is carried out between the local side and the terminal. By use of the power saving method, power saving is realized through switching on and off of a receiving machine and a sending machine by the terminal; and the power saving effect can be achieved by chip firmware updating; no additional hardware circuit is needed; the method has a broad commercial application prospect.

The invention discloses a disease prevention method of increasing the content of phenolic substance in strawberry fruit, and belongs to the technical field of crop cultivation. The method comprises the steps that the strawberry plants are UV-C irradiation treated once every 2-4 days beginning from the flowering period and continuing until the fruiting period; the conditions for the UV-C irradiation treatment are the following: the irradiation dosage amount is less than 0.75 kJ / m2, the irradiation time is less than 70 s; after the UV-C irradiation treatment is completed, the strawberry plants need to be shaded from light for larger than or equal to 8 hours. According to the disease prevention method, the strawberry plants are regularly UV-C irradiated in the flowering and fruiting period, the contents of anthocyanin and flavonol and other phenolic substances in strawberry fruits are significantly increased, meanwhile the antioxidant ability of the fruits is increased; the low dosage UV-C irradiation combined with light shading treatment method is utilized, physiological metabolisms related to the course of disease of the strawberry plants are induced, the anti-disease ability of the strawberry plant per se is effectively increased, and the incidence rate of the natural diseases of the strawberries is significantly decreased.

The invention relates to a method for preparing oxalate tail gas by purified CO coupling. The method mainly solves the technical problem that a removal rate of nitric oxide is low in the prior art. The method comprises the following steps that (a) a tail gas flow, oxygen or air containing nitric oxide and methanol are led in a methanol absorption tower for reaction from a gas inlet and a liquid inlet; a gas phase flow and a liquid phase flow are obtained; and (b) the gas phase flow obtained in Step (a) and an acid urea solution are led in absorption towers or supergravity rotary packed beds; the absorption towers or the supergravity rotary packed beds are connected in series; and the reaction is performed under the conditions that the urea concentration is 5-40%, a pH (power of hydrogen) value is 1-5, the temperature is 20-80 DEG C, the pressure is 0.1-0.5MPa and a liquid-gas ratio is 5-100L / m<3>. With the adoption of the technical scheme, the problem is solved better, so that the method can be used in industrial production of nitric oxide in oxalate tail gas preparation by removed CO coupling.

The invention belongs to the field of medical technology, and relates to an application of n-3 unsaturated fatty acid in preparation of a medicine for preventing and treating traumatic brain injury. The experimental results about the function of n-3PUFAs (polyunsaturated fatty acids) in resisting traumatic brain injury show that the n-3 unsaturated fatty acid can remarkably improve sense and motor functions of a mice after traumatic brain injury, slightly reduces the deletion of brain tissue after injury, inhibits the inflammatory response from excessive activation, promotes the repair of white matter damage, obviously reduces the degeneration and necrosis of nerve cells of CA3 area of hippocampus, and improves the study and memory functions. The n-3PUFAs has a definite neuroprotective effect in resisting brain injury, can be used for preparing nerve protective medicines, and can be used for preventing and treating acute or chronic injury caused by the traumatic brain injury.

The invention discloses an expandable novel epoxy resin composite flame-retardant material and a preparation method thereof, belongs to the technical field of flame retardants, and particularly relates to an expandable novel epoxy resin composite flame-retardant material with good flame retardance, wherein the raw materials comprise, by weight, 67.5 parts of an epoxy resin, 22.5 parts of a curingagent, and 10 parts of a flame retardant, wherein the flame retardant is prepared from 0-10 parts of expandable graphite and 0-10 parts of aluminum hypophosphite. According to the invention, the preparation method is simple, easy to operate, wide in raw material source, low in cost, environmentally friendly, free of special equipment in the whole reaction process and the like, and is suitable forindustrial production; and compared with the pure epoxy resin material, the expandable novel epoxy resin composite flame-retardant material provided by the invention has high thermal stability and high oxygen index, and has wide commercial application prospect.

The invention discloses a Fe-Si-B-P series amorphous alloy catalyst for efficiently degrading dye and a preparation method and application of the Fe-Si-B-P series amorphous alloy catalyst. The catalyst is a strip, the components of all elements according to atomic percent are Fe<100-x-y-z>Si<x>B<y>P , x is more than or equal to 0 and less than or equal to 20, y is more than or equal to 0 and less than or equal to 20, and z is more than or equal to 0 and less than or equal to 10. The Fe-Si-B-P series amorphous alloy strip provided by the invention shows excellent catalytic degradation performance and amorphous forming ability, is a good dye degradation catalyst, and has a wide commercial application prospect.

The invention belongs to the field of environmental protection, and relates to a method for digesting biogas residues from kitchen waste biogas projects by cockroaches and producing feed or feed additives and organic fertilizer. The method comprises the following steps: (1), collecting the biogas residues of kitchen wastes from anaerobic digestion, namely, biogas projects; (2), feeding the biogasresidues in the step (1) to cockroaches; (3), capturing and killing the cockroaches, collecting dead cockroach bodies, and performing sterilization and / or virus inactivation treatment to obtain livestock feed or feed additives; (4), collecting cockroach excrement produced in the step (2) for composting to obtain high-quality organic fertilizer. By high digestion and reproduction capability of thecockroaches, not only can the problem about treatment of the biogas residues from the kitchen waste biogas projects be solved, but also livestock feed or feed additives and organic fertilizer can be produced. Besides, by bioconversion of the biogas residues from the kitchen waste biogas projects by the cockroaches, in-situ utilization of bio-heat can be realized, and no secondary pollutants such as waste water, waste gas and waste residues are produced in the digestion process.

The invention provides a method for preparing a high-density electronic-grade semiconductor-purity super-long horizontal nanotube array. The method includes the steps that a catalyst is supported and placed on a substrate, super-long carbon nanotubes are prepared through the temperature-rise reaction, and then repeated growth, sampling, cutting and the like are conducted in sequence. In the method, through fine optimization of the carbon nanotube preparation technology and length, the high-density ultra-high-semiconductor-purity horizontal carbon nanotube array can be obtained. The simple and reliable method is provided to solve problem of the high-semiconductor-purity horizontal array carbon nanotube preparation which is a key factor restricting the development of current carbon-based integrated circuits, and has a wide commercial application prospect.

The invention provides a device for detecting polysaccharide in fermentation liquor based on Raman spectroscopy and a method and application thereof, and belongs to the technical field of fermentation liquor detection. The device for detecting the polysaccharide in the fermentation liquor based on the Raman spectrum comprises a fermentation tank, a reflector, an optical fiber probe, an optical fiber, an excitation light source, a detector, a signal acquisition module, an A / D conversion module, a single chip microcomputer and a display module, wherein the reflector is located in the fermentation tank, the excitation light source is connected with the optical fiber probe through an optical fiber, the optical fiber probe is connected with the detector through an optical fiber, the detector is further connected with the signal acquisition module, the signal acquisition module is connected with the A / D conversion module, the A / D conversion module is connected with the single-chip microcomputer, and the single-chip microcomputer is connected with the display module. Compared with the traditional polysaccharide detection method, the device provided by the invention does not need purification and separation, simplifies the detection steps, saves the detection time, reduces the polysaccharide detection cost, and has good practical application value.

The invention relates to the technical field of beverage processing, in particular to a Sangkangpu tea fermentation liquor and a kangpu tea beverage, the Sangkangpu tea fermentation liquor is obtained by co-fermenting a kangpu tea mother liquor, an elsholtzia chinensis extracting solution and a mulberry leaf extracting solution, and the Sangkangpu tea fermentation liquor has relatively good safety, relatively high health value and relatively long storage time and storage safety. The invention further relates to a Kangpu tea beverage which has better flavor and better health value.

The invention provides a method and system for continuously producing a cell / electrolytic cell and the cell / electrolytic cell. The method comprises the step of sequentially preparing an anode (hydrogen electrode) layer, an electrolyte layer and a cathode (oxygen electrode) layer on a metal porous thin plate supporting body. The method provided by the invention comprises the steps of firstly, taking a metal porous thin plate as a pressure-bearing supporting body in a continuous production line, then regulating and controlling the thickness of an anode (hydrogen electrode) layer, selectively removing a solvent and part of a binder in an electrolyte slurry layer, and carrying out pressure sintering densification treatment on an electrolyte layer, thereby solving problems that the automation degree is low, the yield is low, and the performance stability is poor in the technology of continuously producing the solid oxide fuel cell / electrolytic cell supported by the metal sheet. Therefore, according to the method provided by the invention, the continuous production of the solid oxide fuel cell / electrolytic tank can be realized, the production process is simplified, the production efficiency and the yield are improved, and the method has a wide commercial application prospect.

The invention provides a batch fabrication method and fabrication equipment for micropumps integrated with chips. By means of the batch fabrication method and fabrication equipment for the micropumpsintegrated with the chips, integrated fabrication and mass machining of the chip-integrated micropumps are realized, a plurality of micropump units in array distribution are made at one time, each micropump unit comprises two one-way valves, a micropump cavity, a film structure and a micropump driving cavity, and one single cut micropump unit can be integrated into a flow channel in a relatively simple manner to be used for fluid driving; and integrated pouring of the micropumps with valves can be realized, high-volume and standardized machining of the micropumps is realized, the integration difficulty of the micropumps on micro-fluidic chips is simplified, and the high-throughput fluid driving requirements are met.

The invention discloses a distributed top pressure power generation system and a regulation and control method on the basis of a multi-objective optimization algorithm. According to the characteristics of input end working medium parameters (such as flow, temperature, pressure difference) and changeable output end load demand and difficult prediction of the distributed top pressure power generation system, the high system output stability, the high running efficiency and the long equipment service life are the objectives, a multi-objective optimization model of the distributed top pressure power generation system is established, the opening degrees of all valves in the system are solved in real time through a non-domination ranking genetic algorithm, and thus the system running efficiencyis improved. Through the multi-objective optimization algorithm, the opening degrees of all electric adjusting valves in the system can be optimized in real time according to change of parameters of the energy supply side and the energy using side, thus the purposes of improving the stability of the distributed top pressure power generation system, prolonging the equipment service life, improvingthe running efficiency and the improving the economic benefits are achieved, and the wide commercialized application prospects are achieved.

The invention provides a strawberry preservation method utilizing linalool fumigation to inhibit botrytis cinerea. According to the preservation method, collected strawberries are subjected to botrytis cinerea inoculation, bacteriostatic activity shown by destroying of the linalool to the function of mitochondria of the botrytis cinerea is utilized, the low-concentration linalool is adopted to fumigate strawberry fruits, thus the infection ability of the botrytis cinerea is significantly reduced, and the gray mold morbidity of the collected strawberries is inhibited. The strawberry preservation method is efficient, safe and easy to operate, compared with current postharvest treatment, the adopted terpenoid volatile substance, namely the linalool, of natural fruits has no adverse effect onthe flavor and appearance quality of the fruits, the efficient, residue-free and pollution-free effects are achieved, and broad commercial application prospects and market value are achieved.

The invention discloses a preparation method of a PAMAM silicon-based cascade double-ring resonant cavity chip for detecting PCA3, and belongs to the technical field of cascade double-ring resonant cavity sensing. The surface of a sensing ring in a silicon-based cascade double-ring resonant cavity is sequentially modified with a silane coupling agent, a PAMAM film and a PCA3 probe, and the silicon-based cascade double-ring resonant cavity chip for detecting PCA3 is prepared. Through the dendritic polyamino group in the PAMAM, the fixed number of PCA3 probes is increased, the specific binding number of the chip to PCA3 is increased, and the response signal of the silicon-based cascade double-ring resonant cavity sensor to PCA3 is enhanced. By utilizing the PAMAM silicon-based cascade double-ring resonant cavity chip with the modified PCA3 probe, the high-sensitivity and high-selectivity detection on the PCA3 can be realized. The chip disclosed by the invention does not need to be marked by fluorescent or luminous groups, so that the detection cost is saved, and the chip is expected to be popularized and applied in diagnosis and treatment of prostatic cancer.