62 results about "Potassium bromide" patented technology

The present invention discloses a method for synthesizing 9-bromoanthracene. Anthracene and potassium bromide are used as raw materials. The final product, 9-bromoanthracene, is obtained by reacting anthracene and potassium bromide in the presence of ferric chloride and 1-acetoxy-1,2-benzidoxyl-3-(1H)-ketone. The method has the advantages of being inexpensive and readily available, easy to produce, and readily purifiable, and can be developed into an industrialized production method.

The invention relates to an absorbable bone hemostasis and repair stent. The absorbable bone hemostasis and repair stent comprises the following raw materials in parts by weight: 15-60 parts of an excipient, 15-60 parts of a softening agent and 5-70 parts of a bone repair promoting component, the excipient is prepared from a polyoxyethylene-polyoxypropylene copolymer; the softening agent comprises a semi-solid mobile phase polymer; the bone repair promoting component comprises a coating and a core, the coating comprises a polylactic acid-glycolic acid copolymer, zinc stearate and potassium bromide, the core comprises calcium phosphate particles, and the coating wraps the surface of the core. The preparation method comprises the following steps: preparing the bone repair promoting component; and preparing the absorbable bone hemostasis repair stent. The absorbable bone hemostasis and repair stent is high in hemostasis and collapse resistance and has good inflammation regulation and bone repair promoting effects. The absorbable bone hemostasis and repair stent can be used for bone hemostasis and bone repair promotion of any bone injury wound.

This invention discloses a method for preparing a Bi3O4Br catalyst for the efficient degradation of tetracycline, comprising the following steps: S1, mixing bismuth nitrate and potassium bromide in an aqueous solution at room temperature, stirring, and filtering after the reaction to obtain a precipitate; S2, washing and drying the obtained precipitate to obtain a BiOBr precursor; S3, placing the obtained BiOBr precursor in a sodium hydroxide solution of a certain concentration and reacting at a certain temperature to obtain the Bi3O4Br catalyst. Experimental results show that the Bi3O4Br catalyst has a larger specific surface area and more photocatalytic active sites than pure Bi3O4Br, and has a higher oxygen vacancy (OV) concentration, exhibiting high catalytic activity in the photocatalytic degradation of tetracycline. This photocatalyst has broad practical value and application prospects.

The invention discloses a preparation method and application of high-fluorescence quantum yield perovskite fluorescent powder based on amino acid, and belongs to the technical field of luminescent materials and display, the preparation method is used for preparing the perovskite fluorescent powder, and the preparation method comprises the following steps: dissolving potassium bromide in deionized water, then adding lead bromide, and carrying out ultrasonic dissolution to obtain a first solution; dissolving cesium bromide in another deionized water to obtain a second solution; mixing the first solution and the second solution, and standing to obtain a mixed solution; dropwise adding the mixed solution into absolute ethyl alcohol, and stirring to obtain a precursor solution; adding amino acid into the precursor solution, and stirring to obtain a precursor reaction suspension; and centrifuging the suspension, collecting the precipitate, centrifugally washing the precipitate with absolute ethyl alcohol, and drying the washed precipitate to obtain the perovskite fluorescent powder. The invention provides a green synthesis method of a water-ethanol system, which is combined with an amino acid synergistic passivation effect to realize low-cost preparation and improvement of luminous efficiency.

The application is suitable for the technical field of nanometer material synthesis and application, and provides a preparation method of crystalline PdCN@amorphous PdP core-shell nanoparticles, which comprises the following steps: polyvinylpyrrolidone, L-ascorbic acid and potassium bromide are added into deionized water to form a mixed solution, after preheating of an oil bath, sodium chloropalladate solution is injected, and then transferred to the oil bath for reaction, and after centrifugation and cleaning, cubic Pd nanoparticles are obtained; the cubic Pd nanoparticles are dissolved in dimethyl sulfoxide solution, transferred to a reaction kettle for reaction, and after centrifugation and cleaning, cubic PdCN nanoparticles are obtained; the cubic PdCN nanoparticles are mixed with oleylamine solution, and after adding trioctylphosphine solution and heating, centrifugation and cleaning, the crystalline PdCN@amorphous PdP core-shell nanoparticles are successfully obtained. The reagents used in the application can be purchased on the market and do not need further treatment, the preparation method is simple, and the required equipment is all basic laboratory equipment, without expensive equipment and instruments.

The present invention discloses a Ru-Cu amorphous nano-alloy for a lithium carbon dioxide battery cathode catalyst and a preparation method thereof, wherein the morphology is a lamellar nanostructure with a thickness of 5 to 100 nm. The preparation method is as follows: ruthenium acetylacetonate, copper acetylacetonate and potassium bromide are dissolved in a mixed solution of ethanol and water to obtain a light red liquid after complete dissolution; the liquid is dried at 80 to 100 ° C for 8 to 16 hours to obtain a solid powder; in an air atmosphere, calcined at 260 to 280 ° C for 60 to 120 minutes, followed by natural cooling; finally, it is obtained by grinding, washing and drying. The Ru-Cu amorphous nano-alloy obtained by the present invention can be used to prepare a lithium carbon dioxide battery cathode, which can greatly increase the decomposition rate of lithium carbonate, solve the key problems such as high charging voltage and low energy efficiency of lithium carbon dioxide batteries, and achieve the purpose of improving the charge and discharge performance of lithium carbon dioxide batteries.

The invention relates to the technical field of electrocatalysis, in particular to a defect-rich cobaltosic oxide electrocatalyst and a preparation method and application thereof.The preparation method includes the steps that cobalt nitrate and di-methylimidazole are dissolved and centrifuged through solvation to obtain a precursor, then the precursor and potassium bromide are annealed together, finally, washing is conducted, and the defect-rich cobaltosic oxide electrocatalyst is obtained; the defect-rich cobaltosic oxide electrocatalyst can be obtained through vacuum drying, and the defect-rich cobaltosic oxide electrocatalyst has excellent water desorption oxygen desorption reaction electrocatalytic activity and stability and has the potential of large-scale industrial application.

This invention discloses a photoelectrocatalyst and its preparation method, wherein the photoelectrocatalyst comprises Zn 2+ Ce 4+ Au; Zn 2+ Including ammonium acetate, zinc nitrate, and hexamethylenetetramine; Ce 4+ Including cerium nitrate, ammonium chloride, and potassium chloride; Au includes PVP, sodium citrate, potassium bromide, and chloroauric acid; Zn 2+ Ce 4+ The molar ratio of Au to Zn is... 2+ Ce 4+ Au = 1:0.5 ~ 1:2.5 * 10 ‑7 ~7.5*10 ‑7 This method uses electrodeposition to prepare ZnO as a substrate. Its vertically aligned one-dimensional (1D) nanostructures exhibit quantum size-dependent effects, effectively shortening the carrier diffusion distance. CeO2 coats the ZnO, forming a stable, acid- and alkali-resistant substrate material. CeO2 traps electrons from Ce... 4+ Restored to Ce 3+ This forms oxygen voids and Ce 3+ / Ce 4+ Electron pairs produce high catalytic activity.

The present application relates to a kind of for CO2 reduction CsPbBr3 quantum dot / BiOCl heterojunction photocatalyst and its preparation method, the preparation method has the following steps: with bismuth oxychloride and lead nitrate is added to aqueous solution, freeze-drying after ultrasonic, by muffle furnace calcination, obtain precursor material;CsPbBr3 quantum dot / BiOCl heterojunction photocatalyst is obtained by two-step calcination method again by adding cesium bromide and potassium bromide, dissolving, ultrasonic, freeze-drying, by muffle furnace calcination its feature is.CsPbBr3 quantum dot / BiOCl heterojunction photocatalyst prepared has excellent performance and good cycle stability.The drug used in preparation is easily obtained and low in price, and preparation is simple and short in time.CsPbBr3 quantum dot / BiOCl heterojunction photocatalyst prepared can be successfully applied in the field of photocatalytic CO2 reduction.

The invention belongs to the technical field of air pollution prevention and control of photocatalytic materials, and particularly relates to a nitrogen-doped bismuth oxybromide-graphite phase carbon nitride heterojunction photocatalyst as well as a preparation method and application thereof. The preparation method comprises the following steps: 1) respectively dissolving ammonium sulfate, bismuth nitrate and potassium bromide in water, mixing and transferring into polytetrafluoroethylene, and obtaining nitrogen-doped bismuth oxybromide by utilizing a hydrothermal method; 2) adopting a hydrothermal-assisted thermal polymerization method, obtaining a precursor through a melamine hydrothermal reaction, and performing nitrogen calcination to obtain tubular graphite-phase carbon nitride; 3) adding the mixed sample into methanol, and adopting a mechanical stirring method to obtain the nitrogen-doped bismuth oxybromide-graphite phase carbon nitride heterojunction photocatalyst. Due to the formation of the heterojunction, the activity of the nitrogen-doped bismuth oxybromide-graphite phase carbon nitride in photocatalytic reduction of carbon dioxide can be greatly improved.

The invention relates to a qualitative and quantitative method for liensinine perchlorate. The qualitative method comprises the following steps: weighing 1mg of liensinine perchlorate and 1mg of liensinine, uniformly grinding and tabletting the liensinine perchlorate and the liensinine with 100mg of potassium bromide respectively, acquiring an infrared spectrum of 4000-400cm <-1 > by adopting an infrared spectrometer, and comparing spectrograms to find that the peak shapes of the liensinine perchlorate and the liensinine are similar, the peak shapes of the liensinine perchlorate and the liensinine perchlorate are common characteristic peaks and the peak shapes of the liensinine perchlorate are unique characteristic peaks of the liensinine perchlorate and the liensinine are common characteristic peaks and the peak shapes of the The quantitative method comprises the following steps: weighing a series of liensinine perchlorate reference substances with different masses, uniformly grinding and tabletting the liensinine perchlorate reference substances and 100mg of potassium bromide respectively, collecting an infrared spectrum, carrying out integration on a 625cm <-1 > characteristic peak to obtain a peak area, and drawing a standard curve by taking the peak area as a vertical coordinate and taking the sampling mass of the reference substances as a horizontal coordinate; the method comprises the following steps: weighing a sample to be detected, collecting an infrared spectrum, integrating a 625cm <-1 > characteristic peak to obtain a peak area, substituting the peak area into the standard curve equation, calculating the mass of the liensinine perchlorate in the sample, and substituting the mass into the content calculation formula to obtain the content of the liensinine perchlorate in the sample. The method is good in precision, repeatability and stability, wide in linear range, high in linear correlation coefficient and high in recovery rate, the problem that liensinine interference cannot be avoided in an existing content determination method is effectively solved, whether liensinine perchlorate is generated or not can be qualitatively judged, and the quantity of liensinine perchlorate generated can be quantitatively detected; and a feasible new method is provided for production process optimization and quality evaluation of liensinine perchlorate.

The invention discloses a method for measuring main components of a calcined nacre mother medicinal material before and after irradiation, which comprises the following steps: (1) preparation of a test sample: weighing the irradiated calcined nacre mother, adding potassium bromide, putting into an agate mortar, uniformly grinding under an infrared lamp to obtain mixed powder, transferring the mixed powder into a mold, transferring the mold to a tablet press, vacuumizing, pressurizing, and drying to obtain the test sample; a test sample is obtained; (2) preparation of a reference substance: weighing calcined mother-of-pearl before irradiation, adding potassium bromide, placing in an agate mortar, uniformly grinding under an infrared lamp to obtain mixed powder, transferring the mixed powder into a mold, transferring the mold to a tablet press, vacuumizing and pressurizing to obtain the reference substance; and (3) determining the fingerprints of the test sample and the reference substance by using an infrared spectrometer method, and carrying out fingerprint change analysis. The method is of great significance to quality research before and after irradiation of the calcined mother-of-pearl and guarantee of the curative effect of the product.

The invention discloses a nano-composite photocatalytic material and a preparation method and application thereof.The preparation method comprises the steps that porous carbon nitride is added into deionized water and stirred, then a silver nitrate solution is added and stirred continuously, then a potassium bromide solution is dropwise added and stirred for a period of time, and the nano-composite photocatalytic material is obtained through filtering, washing, roasting and grinding. The porous carbon nitride and silver bromide nanoparticle composite material is obtained; adding a composite material of porous carbon nitride and silver bromide nanoparticles into deionized water, stirring, then adding the rhenium disulfide quantum dot dispersion liquid, continuously stirring, and then freeze-drying and drying; in the prepared nano composite photocatalytic material, p-g-C3N4 provides stable substrate and basic catalytic activity, AgBr widens the spectral response range and strengthens pollutant adsorption and degradation, ReS2 QDs optimizes charge transfer and improves hydrogen evolution kinetic efficiency, and efficient conversion of solar energy-chemical energy and efficient degradation of organic pollutants are achieved through cooperation of p-g-C3N4, AgBr and ReS2 QDs.

This invention belongs to the field of catalysis technology, specifically relating to a method for preparing cyclopentane derivatives from furan compounds. The method includes the following steps: mixing a furan compound, a copper-based catalyst, a halogen modifier, and a first solvent, and reacting them under a hydrogen atmosphere; the halogen modifier is at least one selected from sodium chloride, sodium bromide, potassium chloride, potassium bromide, chlorobenzene, and bromobenzene. This invention, by adding a halogen modifier to the catalytic system, introduces halogen components onto the surface of the copper-based catalyst to construct Cu-halogen active centers, achieving highly selective rearrangement of furan compounds into cyclopentane derivatives under relatively mild conditions, while significantly suppressing condensation side reactions, improving carbon utilization efficiency, and reducing dependence on the type of support.

The present application relates to a kind of absorbable bone hemostasis repair bracket, the absorbable bone hemostasis repair bracket includes the following weight parts of raw materials: excipient 15~60 parts, softening agent 15~60 parts and promote bone repair component 5~70 parts;The excipient includes polyoxyethylene-polyoxypropylene copolymer;The softening agent includes semi-solid mobile phase polymer;The promote bone repair component includes coating and core, the coating includes polylactic acid-glycolic acid copolymer, zinc stearate and potassium bromide, the core includes calcium phosphate salt particle, and the coating is wrapped in the surface of core.The preparation method includes the following steps: the preparation of promote bone repair component;The preparation of absorbable bone hemostasis repair bracket.The present application absorbable bone hemostasis repair bracket hemostasis anti-ability of scattering is strong, and has good inflammation regulation and promote bone repair effect.The present application absorbable bone hemostasis repair bracket can be used for any bone injury wound surface bone hemostasis and promote bone repair.

The method comprises the following steps: firstly, preparing ferric vanadate through a hydrothermal reaction and calcination, then reacting the ferric vanadate with bismuth nitrate and potassium bromide to synthesize ferric vanadate bismuth oxybromide composite particles, finally adding the composite particles into a solvent, mixing the composite particles with polyvinylidene fluoride and the like to prepare a membrane casting solution, and finally, preparing the membrane casting solution into the photocatalytic membrane. And standing, degassing, forming a film and curing to obtain the photocatalytic film. According to the method, the photocatalytic efficiency and the visible light utilization capability are improved by utilizing the bismuth oxybromide iron vanadate heterojunction, the bismuth oxybromide iron vanadate heterojunction is compounded into the polyvinylidene fluoride matrix, the problems of catalyst recovery and falling are solved, and the membrane is endowed with anti-pollution and self-cleaning capabilities. And the preparation process ensures sufficient construction of heterojunctions, good interfacial compatibility and complete membrane structure, so that interfacial charges are smoothly transferred, the structural defects are reduced, efficient synergy of photocatalysis and membrane separation technologies is realized, the antibiotic wastewater treatment effect is improved, and the method has a good application prospect.

The application discloses a green preparation method of 4,4'-difluorobenzophenone. The method uses 4,4'-difluorobenzene as raw material, potassium bromide as catalyst, acetic acid as solvent, and oxygen as oxidant, and 4,4'-difluorobenzophenone is generated in high selectivity through one-step oxidation under mild conditions. The application surprisingly finds that in the presence of potassium bromide, a new non-metallic catalytic oxidation system of potassium bromide / acetic acid / oxygen is used to realize high-efficiency and high-selectivity conversion of the C-H bond at the benzyl position. Compared with the traditional method, the application does not need to use a transition metal catalyst, does not need to use carbon tetrachloride and other materials damaging the ozone layer, and does not need to involve a dangerous intermediate such as a diazonium salt, the process route is short, the atomic economy is high, the product yield is high, the product purity is high, the catalyst is cheap and easy to obtain, and the application has excellent industrial application prospect and green chemistry characteristics.

The invention discloses a method for determining the content of phenol in an iron-dextran injection / solution through combination of iron-sodium dihydrogen phosphate precipitation impurity removal and back titration, and relates to the field of analytical chemistry. According to the method, pretreatment is realized through precipitation reaction of iron and sodium dihydrogen phosphate, and interference of iron ions in iron dextran on detection is eliminated. Phenol and bromine are subjected to a bromo-phenol reaction through a potassium bromate-potassium bromide system, excessive bromine and potassium iodide are subjected to a reaction to generate iodine, a sodium thiosulfate titration solution is used for titration by means of an iodometric method, and the content of phenol is calculated. The method does not need a precise instrument, is simple and convenient to operate, can simply, quickly and accurately measure the phenol content in the iron-dextran injection / solution, effectively solves the problem of the existing detection technology in the detection of the sample, fills the technical gap in the detection of the phenol content of the iron-dextran preparation in China, and has a good application prospect. And a brand new solution is provided for veterinary drug production quality control and related detection work.

The invention provides a trace element formula suitable for industrial recirculating aquaculture of penaeus vannamei under an artificial seawater condition and a use method of the trace element formula, and relates to the field of industrial recirculating aquaculture. The trace element formula comprises potassium bromide, boric acid, strontium chloride, sodium silicate, zinc sulfate, ferrous sulfate, copper sulfate, manganese chloride, sodium selenite, ammonium molybdate, calcium gluconate and lysine, and the trace elements are added into a common feed to feed penaeus vannamei boone. The defects in the prior art are overcome, the growth efficiency of the penaeus vannamei boone is effectively improved by supplementing related trace elements in the feed, and the economic benefits of culture are increased.

The invention belongs to the technical field of phase-change materials, and particularly discloses a high-suspension double-shell phase-change nanocapsule and a preparation method and application thereof, and the preparation method comprises the following steps: S1, preparing a water phase; s2, preparing an oil phase; s3, emulsifying: adding the oil phase into the water phase, and performing ultrasonic treatment; s4, polymerization: magnetically stirring, raising the temperature, and adjusting the pH value; s5, depositing silver bromide particles: mixing with deionized water, adding cetyltrimethylammonium bromide and potassium bromide, uniformly stirring, then adding silver nitrate, and stirring; and S6, forming a silver shell: adding hydroquinone, performing primary stirring, continuing to add the citric acid buffer solution and silver nitrate, and performing secondary stirring to grow the silver shell. According to the high-suspension-property double-shell phase change nanocapsule and the preparation method and application thereof, the density of the inner shell is low, the density of the outer silver shell is thin, the density of the nanocapsule can be reduced, the suspension stability of the capsule in fluid can be enhanced, the thermal response speed of the capsule can be increased, and the thermal response time can be shortened.

The invention relates to the technical field of material testing, in particular to an infrared transmission tabletting sample preparation method for a strong-absorptivity black material and an obtained tabletting slice. The method comprises the following steps: grinding dry potassium bromide, pressing into a transparent background sheet, and immediately collecting a background spectrum; and co-grinding 0.02-0.4 part by mass of the dried black sample and 100 parts by mass of dried potassium bromide, tabletting to obtain a gray light-transmitting sheet, and immediately measuring. The whole process is operated under an infrared baking lamp and in an environment with the humidity of less than or equal to 30%, tabletting parameters are strictly controlled, and'measurement while pressing 'is realized. Water peak interference can be effectively eliminated, the light transmittance, the signal-to-noise ratio and the baseline stability are remarkably improved, and the method is suitable for high-quality infrared characterization of high-absorptivity samples such as carbon materials, asphalt and ferrous metal materials.

The application discloses a ternary photocatalyst for degrading pharmaceutical wastewater and a preparation method and application thereof, and the preparation method comprises the following process: adding biochar powder into a potassium hydroxide solution, then adding melamine, and performing ultrasonic and stirring activation, and then drying, calcining, and naturally cooling, so as to obtain g-C3N4 / Biochar; the g-C3N4 / Biochar is added into a bismuth nitrate solution and uniformly mixed to obtain a solution A; potassium bromide is dissolved in a mixture of water and ammonia water to obtain a solution B, the solution B is slowly added into the solution A and stirred, and then centrifugation, washing and drying are performed, so as to obtain the ternary photocatalyst for degrading pharmaceutical wastewater. The application introduces another photocatalyst material on the basis of g-C3N4 material and biochar adsorption, and the photocatalytic capacity of the catalyst for the pharmaceutical wastewater is improved.

The invention discloses a Bi4O5Br2 / Nb2O5 heterojunction catalyst and a preparation method and application thereof.The preparation method comprises the following steps that niobium salt is added into a mixed solution of ethyl alcohol and water to be subjected to ultrasonic treatment and stirring till the niobium salt and the water are mixed to be uniform, and a mixture is obtained; heating the mixture, and after the reaction is completed, carrying out solid-liquid separation, washing and drying to obtain a precursor; calcining and grinding the precursor to obtain crystal type Nb2O5; the preparation method comprises the following steps: dissolving bismuth salt in ethylene glycol to form a solution A, dissolving potassium bromide in ethanol to form a solution B, mixing the solution A, the solution B and crystalline Nb2O5, heating, and after the reaction is completed, carrying out solid-liquid separation, washing and drying to obtain the Bi4O5Br2 / Nb2O5 heterojunction catalyst. According to the composite catalyst disclosed by the invention, in a photocatalytic reduction reaction of CO2, the yield of CO and the yield of CH4 respectively reach 4.6 mu mol g <-1 > h <-1 > and 3.7 mu mol g <-1 > h <-1 > and are respectively increased by 2 times and 4.6 times compared with Bi4O5Br2, and a new thought is provided for developing a high-efficiency heterojunction photocatalyst.

The invention relates to an Ir nanoparticle catalyst with rich grain boundaries and a preparation method and application thereof, and belongs to the technical field of electrode material preparation. The gram-level preparation method of the Ir nanoparticle catalyst with the rich grain boundary comprises the following steps: dissolving iridium metal salt and potassium bromide in a mixed solvent, carrying out ultrasonic treatment to uniformly disperse the iridium metal salt and the potassium bromide, and drying to obtain a precursor A; and then rapidly heating and cooling the precursor A in a Joule heating instrument to obtain the Ir nanoparticle catalyst with abundant grain boundaries. According to the preparation method disclosed by the invention, gram-level preparation of the rich-grain-boundary Ir nanoparticle catalyst can be simply realized, the prepared catalyst shows excellent electrochemical performance in an acidic oxygen evolution reaction, and a new research scheme is provided for industrial application of electrolyzed water.

The invention belongs to the technical field of medicinal chemistry, and discloses a synthetic method of 4-bromo-2-methylpyrimidine-5-carboxaldehyde, which comprises the following specific steps: heating 3-methoxy-2-enitrile, trimethyl orthoacetate and ammonium acetate to react until the reaction is complete, and performing post-treatment to obtain 2-methyl-4-aminopyrimidine; continuously stirring and reacting with hydrochloric acid, sodium nitrite and potassium bromide until the reaction is complete, and performing post-treatment to obtain 4-bromo-2-methylpyrimidine; continuing to react with tartaric acid and urotropine in a heat preservation manner until the reaction is complete, and performing post-treatment to obtain the 4-bromo-2-methylpyrimidine-5-carboxaldehyde. The invention develops an efficient, simple, convenient and environment-friendly preparation method of 4-bromo-2-methylpyrimidine-5-carboxaldehyde, and has important significance for promoting the research and development of nitrogen benzene ring compounds and the development of related pharmaceutical chemistry fields.

The invention provides a preparation method of a multienzyme active nano-material and application of the multienzyme active nano-material in a diabetes wound healing material, and belongs to the technical field of nano-material preparation and wound healing treatment. Glucose, urea and potassium bromide jointly react with ruthenium salt and sodium hexachloroiridate (IV) in a water phase to form a porous foam precursor, then Joule thermal shock treatment is carried out in the air atmosphere, rapid calcination is achieved, the IrSAC-RuO2 nano-enzyme with Ir monatomic anchored to RuO2 is successfully constructed, the Ir monatomic metal loading capacity reaches up to 1.22-4.65 wt%, and the IrSAC-RuO2 nano-enzyme can be used for preparing an IrSAC-RuO2 nano-enzyme. The compound shows excellent POD enzyme activity, CAT enzyme activity, SOD enzyme activity and excellent antibacterial performance, and can significantly promote the repair of diabetic wounds.

The invention relates to the technical field of contact lens disinfectants, and particularly discloses a deproteinization care solution for contact lenses as well as a preparation method and application of the deproteinization care solution aiming at the problems of poor sterilization timeliness, low efficiency and poor disinfection and sterilization effects of a currently common deproteinization AB solution for disinfecting the contact lenses. The deproteinization care solution for the contact lenses comprises a solution A and a solution B. The solution A is prepared from, by mass, 0.5%-0.8% of sodium hypochlorite, 1.0%-1.5% of anhydrous sodium carbonate, 0.2%-0.4% of sodium hydroxide, 0.01%-0.03% of PHMB nanoparticles, 0.03%-0.07% of EDTA-2Na and the balance water for injection; and the liquid B comprises the following components in percentage by mass: 0.5-1.0% of potassium bromide, 0.4-0.6% of anhydrous sodium carbonate, 0.05-0.15% of sodium silicate and the balance of water for injection. According to the deproteinization care solution for the contact lenses, through the synergistic effect of multiple components in the solution A and the solution B, the dynamic and stable disinfection and sterilization efficiency is achieved, and damage to the lenses and eye stimulation caused by too high alkalinity can be reduced.

The invention discloses a middle and far infrared optical film based on a potassium bromide film and a preparation method thereof, and relates to a far infrared band optical film technology. The anti-reflection film comprises a substrate, a front anti-reflection film system and a back anti-reflection film system, wherein the front anti-reflection film system is located on one side of the substrate, and the back anti-reflection film system is located on the other side of the substrate; the middle and far infrared optical film window is prepared by alternately depositing zinc selenide serving as a high-refractive-index film material and potassium bromide serving as a low-refractive-index film material. The middle and far infrared optical film based on the potassium bromide film provided by the invention can realize the anti-reflection of a wide spectrum with a far infrared band of 5-28 [mu] m, the average transmittance is 87.64%, and the highest value of the transmittance is 91.44%.

The invention discloses a metal Mg-mediated BiOBr photocatalyst as well as a preparation method and application thereof in photocatalytic carbon dioxide reduction, and belongs to the technical field of photocatalytic materials. The preparation method comprises the following steps: adding bismuth nitrate pentahydrate into deionized water, violently stirring, and marking as a solution A; uniformly dispersing the ethylene glycol solution of potassium bromide, adding the ethylene glycol solution of magnesium nitrate, and marking as a solution B; and adding the solution B into the solution A, violently stirring, putting into a high-pressure kettle, carrying out hydrothermal reaction, and after the reaction is finished, cooling, washing and carrying out vacuum drying to obtain the Mg-mediated BiOBr photocatalyst. Compared with an existing photocatalyst, Mg-mediated BiOBr has good CO2 responsivity, separation and transfer of carriers can be accelerated through Mg mediation, and therefore the activity of photocatalytic reduction of CO2 is improved.

The invention discloses a synthesis method and application of a bismuth-rich bismuth oxybromide solid solution single crystal nanosheet for visible light driven full water decomposition. According to the method, bismuth oxide and lanthanum oxide are used as raw materials, a binary molten salt system of potassium bromide and lithium bromide is used as a bromine source, the bismuth-rich bismuth oxybromide solid solution single crystal is synthesized in situ, in the process, the stoichiometric ratio of the bismuth oxide to the lanthanum oxide is regulated and controlled, complete mutual dissolution of the lanthanum and the bismuth in crystal lattices can be achieved, and the bismuth-rich bismuth oxybromide solid solution single crystal is obtained. Therefore, the formed bismuth-rich bismuth oxybromide solid solution is stable in structure. The prepared bismuth-rich bismuth oxybromide solid solution monocrystal nanosheet has the advantages of simple synthesis process, good repeatability and the like, meets the requirements of large-scale production, not only has an energy band structure required by a full-water decomposition reaction, but also can effectively inhibit the compounding process of photo-induced electron-hole pairs, and is suitable for large-scale production. The separation efficiency and the surface migration rate of current carriers are remarkably improved, so that wide application prospects are shown.