67 results about "Iodine vapor" patented technology

The invention belongs to the field of organic chemical materials, and relates to a benzimidazolyl deep calixarene cross-linked polymer as well as a preparation method and application thereof in iodine adsorption. According to the method, a chlorine foot in a benzimidazolyl calixarene synthesis technology with a chlorine substituted foot is replaced by an azide foot, and then an azide group and 1, 6-heptadiyne are subjected to a click reaction catalyzed by cuprous. And the insoluble benzimidazolyl deep calixarene cross-linked polymer NCCP-I is prepared in a relatively short reaction time and a relatively high yield. The NCCP-I is non-porous, is an amorphous compact particle with an irregular crystal structure, and has relatively high thermal stability. When the NCCP-I is used for adsorbing iodine vapor, the saturated adsorption capacity reaches 1.36 g.g <-1 >. The method is simple in synthesis path, good in reproducibility and good in stability, can be recycled, provides reliable guarantee for nuclear safety protection and environmental governance, and has great social value and economic value.

Provided in the present invention are a preparation method for a crown ether covalent organic framework material, and the use thereof in iodine adsorption. In the present invention, an 18-crown-6-ether group is introduced into the structure of a covalent organic framework (COF) material for iodine adsorption work. The covalent organic framework material can form a one-dimensional pore channel structure in order, and the 18-crown-6-ether can be selectively complexed with iodine molecules, thereby achieving the purpose of efficient iodine adsorption. The material can perform specific iodine adsorption from high-temperature iodine steam, and the iodine steam adsorption capacity of the COF material is as high as 5.56 g / g. The COF material has a high adsorption capacity, is easy to prepare and simple to operate, has a high adsorption efficiency, and is particularly suitable for adsorbing and separating radioactive iodine in the nuclear industry.

The invention relates to the technical field of adsorption materials, and provides an application of a covalent organic framework in iodine vapor adsorption, including an application of compounds as shown in formulas 1-8 in iodine vapor adsorption. Compared with the prior art, the method has the advantages that the iodine elementary substance can be effectively adsorbed by utilizing the advantages of high porosity, high specific surface area, abundant nitrogen atoms in a framework and the like of COFs, so that the problem of recovery and treatment of the radioactive iodine elementary substance in the nuclear waste is solved, and the harm of radioactive iodine to human is reduced. Moreover, the compounds as shown in the formulas 1-8 contain light elements such as C, H, O and N, and the dosage of the compounds is smaller when the compounds adsorb the same iodine.

The invention discloses an application of a novel miscellaneous [3] aromatic hydrocarbon crystal material in adsorptive separation of a pyrrolidine and tetrahydrofuran mixture and / or capture of iodine vapor, and relates to the technical field of adsorption.Firstly, the novel miscellaneous [3] aromatic hydrocarbon crystal material capable of adsorptive separation of pyrrolidine and tetrahydrofuran so as to realize iodine capture is synthesized; the application method comprises the following steps: selectively adsorbing pyrrolidine in a mixture of pyrrolidine and tetrahydrofuran by adopting the novel miscellaneous [3] aromatic hydrocarbon crystal material to obtain a pyrrolidine-miscellaneous [3] aromatic hydrocarbon crystal material, realizing separation of tetrahydrofuran and pyrrolidine, and capturing iodine vapor by adopting the pyrrolidine-miscellaneous [3] aromatic hydrocarbon crystal material. Compared with other macrocyclic aromatic hydrocarbons, the method provided by the invention not only can realize separation of tetrahydrofuran and pyrrolidine, but also has the advantages of high iodine adsorption capacity, good thermal stability and the like; meanwhile, the synthesis method has the advantages of simplicity in operation, high yield, simplicity in post-treatment, easiness in separation and purification of products and the like.

The invention discloses a buffering and flow stabilizing device for an iodine working medium space propulsion system, which comprises a buffering cavity, the input end of the buffering cavity is connected with the output end of an iodine storage and supply module through a pipeline, the output end of the buffering cavity is connected with the input end of a thruster module, at least one group of rectifying components is arranged in the buffering cavity, and the rectifying components are connected with the thruster module through a pipeline. A porous medium plate covering an inner side port of the output end of the buffer cavity is installed at the output end of the buffer cavity, a plurality of temperature sensors and pressure sensors are further installed in the buffer cavity, and the temperature sensors and the pressure sensors are in communication connection with a control module of the iodine working medium space propelling system; and the control module feeds back and adjusts heating parameters of the iodine storage and supply module through data collected by the temperature sensor and the pressure sensor. By means of the mode, the iodine vapor supply stability can be improved, solid particles entering the propeller are reduced, and the thrust stability is improved.

The invention discloses a multi-stage leaching purification method of a targeted therapeutic drug. The multi-stage leaching purification method comprises the following steps: sequentially filling an adsorption column with a porous organic polymer layer and an adsorption ball layer; controlling the flow rate of the leacheate and the column temperature for leaching, and setting an adsorption saturation threshold value; carrier gas is adopted to heat and desorb the porous polymer layer, and carrier gas components are switched to heat and desorb the adsorption ball layer; the method comprises the following steps: introducing carrier gas carrying iodine vapor into an alkaline absorption tower to treat waste gas, eluting impurities of adsorption balls by adopting an acidic mixed solution, and performing catalytic degradation by combining ultraviolet light; a chelating agent solution is used for regenerating adsorption balls, a silver salt solution is used for heavily loading silver ions, an organic solvent is used for eluting and regenerating a porous polymer, regular calibration and part replacement are conducted on a system, and organic pollutants and radionuclides in a matrix are difficult to treat synchronously through a traditional single-layer adsorption material; according to the leaching purification method, the generation amount of radioactive waste liquid is remarkably reduced, and meanwhile the shielding protection requirement of the follow-up purification step is reduced.

The present invention provides a method for recovering iodine and boric acid from iodine-containing waste liquid. The method includes: subjecting the iodine-containing waste liquid to primary acidification after pretreatment, followed by solid-liquid separation to obtain boric acid and iodine-containing solution; sequentially performing secondary acidification and oxidation on the iodine-containing solution to obtain a solid-liquid mixture containing iodine and boric acid; adjusting the pH value of the solid-liquid mixture with alkali and then performing solid-liquid separation to obtain iodine and a salt-containing solution; subjecting the iodine vapor generated during the reaction to condensation and spray absorption in sequence, and returning the condensed iodine for co-recovery. The method of the present invention first precipitates boric acid through acidification treatment according to the composition of the iodine-containing waste liquid, recovers the boric acid product, and then obtains a high-purity iodine product through further acidification and oxidation reactions; the present invention condenses and spray-absorbs the iodine vapor to avoid iodine loss and possible environmental pollution, and ensures the iodine recovery rate; the method is simple to operate, has mild conditions, low cost, and realizes the resource utilization of the waste liquid.

The invention discloses a preparation method and application of a pyrenyl imine covalent organic framework material, and belongs to the technical field of materials. The preparation method comprises the following steps: dissolving 4, 4 ', 4', 4 ''-(pyrene-1, 3, 6, 8-tetrayl) tetraphenylamine and 3, 3 '-dimethoxy-[1, 1'-biphenyl]-4, 4 '-diformaldehyde in an organic solvent, fully mixing, and adding a catalyst to obtain a mixed solution; and freezing the mixed solution with liquid nitrogen, exhausting air, removing oxygen, carrying out a heating reaction, obtaining a yellow precipitate after the reaction is finished, and carrying out filtering, washing and vacuum drying treatment to obtain the pyrenyl imine covalent organic framework material. Pyrenyl and imine bonds on the pyrenyl imine covalent organic framework material structure prepared by the invention can provide a large number of binding sites bound with iodine, and the pyrenyl imine covalent organic framework material has the advantages of high crystallinity, large specific surface area, strong stability and the like, and can be used as a solid adsorption material for effective iodine vapor adsorption.

The invention provides a two-dimensional chalcogenide, which is a crystalline material, and has a chemical formula of (NH4)2[Sn3S7]·(C4H13N3)1.41, cell parameters of a=b=13.2307(10) Å, c=19.335(2) Å, α=β=90°, and γ=120°, and space group of P63 / mmc. The invention further provides a method for preparing the two-dimensional chalcogenide and use thereof in the adsorption of iodine vapor. The two-dimensional chalcogenide of the present invention is capable of removing iodine vapor of various concentrations (as low as 400 ppm) over a wide range of temperatures (25° C.-75° C.), without desorption of iodine after standing for a long time.

The invention discloses a novel ionic pyridyl covalent organic framework material and application thereof in iodine adsorption. According to the invention, an ionic pyridyl group is introduced into the structure of the covalent organic framework material, and the covalent organic framework material is applied to iodine adsorption. The I-coated COF-DMPD-1 can induce iodine molecules to form polyiodide anions through iodide ions, and meanwhile, electrostatic interaction is formed between the formed polyiodide anions and a cation skeleton, so that the I-coated COF-DMPD-1 has high adsorption performance on iodine. The I (at) COF-DMPD-1 has a high adsorption rate on iodine in high-temperature iodine vapor, and the adsorption capacity of the I (at) COF-DMPD-1 on iodine is as high as 8.92 g / g. The I-coated COF-DMPD-1 has the advantages of high adsorption capacity, high adsorption rate and cyclic adsorption, and is suitable for adsorbing and separating radioactive iodine in the fields of nuclear industry and environmental pollution.

A flow containing iodine (I2) vapor and at least one of an inert gas and water vapor. One method for recovering iodine (I2) is to bring the flow into contact with an alkaline solution to form an iodide salt. To achieve, to bring the flow into contact with the adsorbent and selectively adsorb water from the flow, to concentrate the flow By contacting it with an acid, water vapor is absorbed from the flow, or iodine (I2) vapor is back sublimated or Condensing to form solid or liquid iodine (I2), or bringing the flow into contact with the material Furthermore, among the absorption of latent heat and sensible heat by a material through its phase change, When performing at least one of the following, iodine (I2) vapor is condensed or backsublimated from the flow. It can include the following:

Methods of recovering iodine (I2) from a stream including iodine (I2) vapor and at least one of: an inert gas and water vapor can include contacting the stream with an alkaline solution to form an iodide salt, contacting the stream with an adsorbent to selectively adsorb water from the stream, contacting the stream with a concentrated acid to absorb the water vapor from the stream, desublimating or condensing the iodine (I2) vapor to form solid or liquid iodine (I2), or contacting the stream with a material to condense or de-sublimate the iodine (I2) vapor from the stream as the material at least one of: absorbs latent heat through a phase change of the material and absorbs sensible heat.

The invention provides a recycling method of metal vanadium turning waste, and relates to the technical field of metallurgy, and the recycling method of the metal vanadium turning waste comprises the following steps: S1, treating wire-coil-shaped turning waste, S2, vacuumizing and preheating the treated turning waste, S3, heating and degassing, S4, adding elemental iodine to start iodination, and S5, generating volatile vanadium iodide. And S6, the metal vanadium with the purity being 99.95% or above is obtained, the metal vanadium turning waste can be effectively recycled and reused through the iodination purification technology, due to the wire-coil-shaped structure and gaps of the waste, the iodination reaction is smoothly conducted, and the product quality is improved. The efficient utilization of the waste is promoted, the iodination method utilizes the selective effect of iodine to transfer the metal vanadium from a low-temperature area to a high-temperature area for deposition, so that separation and purification are realized, and the high-value recovery of the metal vanadium turning waste is successfully realized.

The invention belongs to the field of iodine adsorption material technology, and in particular to a kind of bismuth-based adsorbent and its preparation method and application. The present invention is with P123 as structure directing agent, and its surface is rich in silanol, with tetraethyl orthosilicate as silicon source, bismuth salt is bismuth source, and washing, drying and calcining are carried out successively after hydrothermal synthesis, bismuth is loaded on SBA 15 surface, bismuth-based adsorbent (Bi SBA 15) is obtained, SBA 15 is the molecular sieve with porous structure, Bi has affinity and stability to silica substrate to iodine vapor, and the adsorption capacity of obtained bismuth-based adsorbent to iodine vapor is high, strong stability. The present invention prepares bismuth-based iodine adsorbent under neutral conditions, without the need to add acid source, more environmentally friendly, while the present invention uses " one-step method ", directly bismuth source is doped in mesoporous material pore wall during synthesis of SBA 15, simple to operate, with low cost.

The invention provides a preparation method of superfine nickel powder, and relates to the field of powder material preparation. The method comprises the following steps: carrying out first-stage roasting on nickel particles in the presence of iodine vapor and an additive; wherein the additive is a combination of hydrogen iodide and chlorine; carrying out second-stage roasting on the first-stage roasting product in the presence of a mixed gas of hydrogen and hydrogen chloride; wherein the temperature of the second-stage roasting is 950-1150 DEG C, and the duration of the second-stage roasting is 1-3 hours; and the second-stage roasting product is cooled to the room temperature in the atmosphere of hydrogen and argon, and the superfine nickel powder is obtained. According to the method, the nickel powder is obtained by treating the nickel particles through iodination roasting, and meanwhile the iodine steam can be recycled. In addition, regulation and control of the process and impurity elements are further realized by introducing an additive in the roasting process.

The present invention discloses an iodine detection indicator card and its application, belonging to the technical field of gaseous iodine detection. The iodine detection indicator card is prepared by adding an iodine detection indicator into a carrier, mixing the iodine detection indicator evenly, and then scraping the iodine detection indicator onto a clean glass to form a detection indicator card; the carrier is a polymer, a resin, or paper; the iodine detection indicator is obtained by heating sulfur powder and stannous chloride powder in diethylenetriamine. The iodine detection indicator card of the present invention has different degrees of color change effect at different iodine vapor concentrations, can identify iodine vapor in different concentration ranges, and has a fast response during detection, changing color when encountering iodine, does not require complicated operation steps and professional skills, is easy to carry and use, is suitable for rapid on-site detection, and is more affordable and has a lower cost when a large number of test samples are required.

The invention provides a preparation method of a crown ether covalent organic framework material and application of the crown ether covalent organic framework material in iodine adsorption. According to the invention, the octadecacrown-6 ether group is introduced into the structure of the covalent organic framework material for iodine adsorption work. The covalent organic framework material can form a one-dimensional pore channel structure in order, and meanwhile, the octadecacrown-6 ether can be selectively complexed with iodine molecules, so that the purpose of efficient iodine adsorption is achieved. The material can perform specific iodine adsorption from high-temperature iodine vapor, the iodine vapor adsorption capacity of the COF material reaches up to 5.56 g / g, and the COF material is high in adsorption capacity, easy to prepare, simple to operate, high in adsorption efficiency and particularly suitable for adsorbing and separating radioactive iodine in the nuclear industry.

The present application relates to a kind of preparation methods of COFs iodine vapor electrochemical sensor based on redox activity, which comprises adding COFs with redox activity into methanol, obtaining a mixture, transferring the mixture into the active area of interdigital electrode, evaporating solvent by heating, and obtaining iodine vapor electrochemical sensor.The iodine vapor electrochemical sensor of the present application has high stability, high selectivity and high sensitivity.When air mixed with iodine vapor passes through the electrochemical sensor, iodine is captured by the polymer film.Based on redox reaction, the impedance of the electrochemical sensor decreases rapidly, and iodine vapor can be detected sensitively and quickly.The preparation is simple, the cost is low, the process is simple and easy to produce, and the adsorption capacity is high, etc., and has good application prospect in the field of iodine vapor sensing technology, etc.

The invention discloses an iodine separation device and method. The device comprises a sealing cover as well as a hot solution tank, a cold column, a scraper blade and an iodine collection device which are arranged in the sealing cover, the cold column is arranged at the upper part of the hot solution tank, one end of the scraper is connected to the iodine collecting device, and the other end is lapped on the outer surface of the cold column. The method comprises the steps that the pressure in the starting sealing cover is kept to be lower than one atmospheric pressure; the cold column is rotated, so that the scraping plate is tightly attached to the cold column; the surface temperature of the cold column is lower than 35 DEG C; a mixed solution of hydrogen iodide and iodine is injected into a hot solution tank, the temperature of the mixed solution is gradually increased, after the temperature reaches 44 DEG C or above, iodine begins to sublimate, iodine steam emerges from the mixed solution, and after the iodine steam upwards encounters the surface of a low-temperature cold column, the iodine is condensed on the surface of the cold column; in the rotating process of the cold column, iodine condensed on the surface of the cold column is shoveled and scraped by the scraping plate and falls off after reaching the scraping plate, and the iodine falls into the iodine collecting device along the scraping plate. The method has the advantages of being simple in technological process and low in energy consumption.

The invention discloses a preparation method of a cuprous iodide transparent film, which comprises the following steps: taking a silicon and ITO (Indium Tin Oxide) conductive film as a substrate, and obtaining a copper film on the surface of the substrate by a magnetron sputtering method; then spin-coating a polymethyl methacrylate (PMMA) film on the surface; and after iodination, the PMMA film is dissolved with acetone to remove the PMMA film, and the CuI film is obtained. The amount of iodine reacting with copper is blocked by spin-coating the film on the copper surface, the reaction rate is reduced, and the film quality is improved. The CuI film prepared by the invention has the advantages of continuity, compactness, high surface brightness and weak light diffusion. The method is simple and low in cost, and industrial production can be realized.

The invention discloses a device for simulating a rod-shaped fuel reactivity introduction accident by using laser heating. The device comprises a furnace body with a window, two ytterbium-doped fiber lasers facing the furnace body, a positive cone prism and a lens arranged at the window position of the ytterbium-doped fiber laser on one side, a thermal imager, a digital image measuring device and a signal acquisition and control device arranged around the furnace body, and further comprises a helium tank, a helium inlet pipe and a helium control valve, an iodine generating device and an iodine vapor control valve, a sample stage arranged at the center of the furnace body, a sample stage bracket supporting the sample stage, and a gas outlet pipe connected to the sample stage and a gas collection device. The device preheats the experimental sample by using the thermal imager and the signal acquisition and control device, controls the iodine concentration inside the sample stage by using the iodine vapor control valve and the helium control valve, monitors the deformation of the experimental sample throughout the entire process by using the digital image measuring device, and forms a laser ring by using the ytterbium-doped fiber laser, the positive cone prism and the lens on the other side to simulate the rod-shaped fuel reactivity introduction accident.

The application belongs to the technical field of electrode materials, and particularly relates to an iodine etching Ti4O7 electrode material and a preparation method and application thereof. The Ti4O7 is mixed with iodine powder through ball milling, an alcohol solution is added, and the mixed iodine is dissolved by ultrasonic oscillation, the alcohol solution is completely volatilized in the form of natural evaporation drying at room temperature, and then the obtained powder is put into a high-pressure reaction kettle for reaction, the iodine sublimates under heating in the reaction kettle, the iodine vapor corrodes the Ti4O7, the surface structure of the Ti4O7 changes, and finally the iodine etching Ti4O7 anode is prepared by performing spark plasma sintering (SPS). The surface structure of the Ti4O7 is changed, defects are generated, the surface oxygen vacancies are increased, the active sites on the electrode surface are increased, and higher ·OH production is obtained. The preparation method can significantly improve the catalytic activity of the Ti4O7 anode.

The invention provides an intermittent production method of triethyl aluminum. The method comprises the following steps: mixing triethyl aluminum, aluminum powder and iodine vapor; adding hydrogen for hydrogenation reaction; and carrying out acetylation reaction with ethylene to prepare the triethyl aluminum. The iodine vapor is adopted to activate the aluminum powder, the initiation time of the aluminum powder to the reaction is shortened, the hydrogenation reaction time is shortened, and therefore the whole reaction speed is increased; meanwhile, by adopting the method disclosed by the invention, the iodine vapor is easy to remove, the iodine vapor can be recycled, and the production cost can be reduced while the reaction efficiency is improved.

The invention discloses equipment for extracting crude iodine from brine evaporation mother liquor, and relates to the technical field of crude iodine extraction.The equipment comprises a feeding system used for introducing the brine evaporation mother liquor; the oxidation reaction unit is used for generating the optimal oxidant dosage through linkage analysis; the feedback control algorithm module is used for feeding back; the reaction tower is used for enhancing the gas-liquid reaction contact efficiency of the mother liquor and the oxidizing agent; the evaporation unit is used for heating to volatilize the iodine simple substance generated by oxidation to form iodine vapor; and the condensation and collection unit is used for cooling and recycling the iodine vapor to form crude iodine crystals. The method solves the technical problems of low crude iodine extraction rate and resource waste and environmental pollution caused by direct discharge of the mother liquor in the prior art, and achieves the technical effects of efficiently extracting the crude iodine in the brine evaporation mother liquor, improving the resource utilization rate and reducing the environmental pollution.

The invention discloses a high-temperature corrosion environment deformation testing device which comprises a rack, a kettle cover is arranged on the rack, a supporting assembly is arranged at the bottom of the kettle cover, a tubular sample is installed on the supporting assembly in a sleeving mode, a tubular fragile mandrel is placed in the tubular sample, a pressing assembly penetrating through the kettle cover is arranged in the rack, and the pressing assembly penetrates through the kettle cover. The bottom end of the pressing assembly is inserted into the tubular fragile mandrel and enables the tubular fragile mandrel to be broken. The device has the beneficial effects that the supporting assembly, the first steam channel, the pressing assembly, the second steam channel and the tubular fragile mandrel are adopted, so that the testing accuracy is improved when a material is subjected to a deformation test; by adopting the positioning ring groove, when the tubular sample is pressed by the elastic pressure plate, the tubular sample is positioned by the positioning ring groove, so that the tubular sample is more stable, and further, the iodine vapor is not easy to leak.

The utility model discloses a fingerprint extraction sampler, and particularly relates to the technical field of fingerprint extraction, the fingerprint extraction sampler comprises a box body, the inside of the box body is connected with a vertical plate, the outer side of the vertical plate is connected with a jacket, the inner side of the jacket is connected with a glass test tube, and the bottleneck of the glass test tube is connected with a rubber plug; three connecting rods are connected to the lower portion of the rubber plug, a bottom plate is connected to the tail ends of the connecting rods, air holes are formed in the bottom plate, and a second pipe body is slidably connected to the outer side of the bottom plate; the bottom face of the inner wall of the box body is connected with an alcohol lamp, paper with hidden fingerprints is placed in the second tube body, an iodine particle is placed at the bottom of each glass test tube, during heating, iodine starts to sublimate and becomes purple-red steam, and grease and the like in the fingerprints on the paper are organic solvents, so that the fingerprints on the paper cannot be damaged. Therefore, the iodine vapor can be dissolved in the oil substances after rising to the opening of the test tube, the fingerprints are shown, the operation steps are simple, and the fingerprint extraction and sampling efficiency is improved.

Provided are a carbon nanotube purification method and purification device that use safer iodine vapor instead of chlorine or bromine gas and a carbon nanotube aggregate produced by the purification method and purification device.　The present invention involves heating carbon nanotubes to 600°C–1400°C in an inert gas atmosphere and bringing the carbon nanotubes into contact with iodine vapor to remove metal from the carbon nanotubes as a metal iodide. According to the present invention, a carbon nanotube aggregate includes carbon nanotubes and hollow carbon particles that are doped with iodine and have had catalyst metal particles removed therefrom without opening carbon shells.

This invention belongs to the field of nuclear reactor target safety design, specifically relating to a method and system for calculating the internal pressure of a target based on the amount of tellurium compound. The method first determines the required core data; based on the mass and density of the tellurium compound, the effective volume of iodine vapor inside the target is calculated, where the effective volume is the internal volume of the target minus the volume occupied by the tellurium compound; based on the mass of the tellurium compound, the tellurium element mass fraction, and the number of iodine molecules generated per unit mass of tellurium element, the total amount of iodine vapor is calculated; based on the ideal gas law, the internal pressure of the target is calculated using the total amount of vapor, the gas constant, the operating temperature, and the effective volume. This invention establishes a dynamic correlation between the amount of tellurium compound and the effective volume, clarifies the mass conversion relationship between Te and the tellurium compound, and constructs a high-precision I-131 target internal pressure calculation model, possessing significant engineering application value and theoretical innovation significance.

To provide a carbon nanotube purification method and purification device in which safer iodine vapor is used in place of chlorine gas and bromine gas and a carbon nanotube assembly produced by them.SOLUTION: A carbon nanotube is heated to 600 to 1400°C in an inert gas atmosphere and is brought into contact with iodine vapor to remove metal as metal iodide from the carbon nanotube. A carbon nanotube assembly includes a carbon nanotube and a hollow carbon particle from which catalyst metal particles are removed by doping with iodine while a carbon shell in a closed state is retained.SELECTED DRAWING: Figure 3

The invention discloses a lead salt single crystal sensitized thin film, a preparation method thereof and application of the lead salt single crystal sensitized thin film in an infrared detector, and relates to the technical field of optoelectronic semiconductor materials. The preparation method of the lead salt single crystal sensitized thin film comprises the following steps: S1, growing a lead salt thin film on a substrate; s2, performing oxygen high-temperature pre-sensitization treatment on the lead salt thin film to form an oxygen-doped lead salt thin film; and S3, the oxygen-doped lead salt thin film reacts with iodine steam, a sensitized lead salt thin film is formed, and the lead salt single crystal sensitized thin film is obtained. The sensitized lead salt thin film prepared through the method has high black body photothermoelectric response, a 500 K black body can generate 1.2 * 10 < 4 > V / W responsivity, the photoelectric response of a lead salt device is improved, and the lead salt single crystal sensitized thin film prepared through the method is high in crystallization quality, low in defect density, uniform in surface and good in bonding stability with a PMN-PT ferroelectric crystal substrate.