35 results about "Ferric chloride hydrate" patented technology

The proposed coagulating and flocculating agent and the method for making it provide an efficient and economically attractive means for cleaning liquids, particularly water, and waste water and sludge. The spent FCC catalyst based coagulating and flocculating agent is a mineral material comprising polymeric aluminum chloride (PAC) [Al2(OH)nCl6-n]m, n<5, m<10, hydrated ferric chloride [FeCl3·6H2O] and extracted spent FCC catalyst. Furthermore, polymeric aluminum chloride and hydrated ferric chloride are evenly distributed inside the inter pores and outside surface of spent FCC catalyst, this unique feature of the proposed coagulating and flocculating agent leads to an excellent water treatment efficiency. In addition, the method of making it eventually convert spent FCC catalyst, currently being treated as semi-hazardous wastes produced by FCC process, into an environmental friendly new product without any byproduct in the making process.

The invention discloses a PPy / Fe3O4 / reduced graphene oxide ternary composite wave-absorbing material and a preparation method thereof. Graphite oxide and ferric chloride hexahydrate are used as a precursor, and an Fe3O4 / reduced graphene oxide composite material is prepared through a solvothermal reaction. Then, the Fe3O4 / reducted graphene oxide is dispersed in deionized water, a pyrrole monomer and an oxidizing agent are added, and a PPy / Fe3O4 / reduced graphene oxide ternary composite material of a "sandwich" structure is prepared by using a wet chemical method. The preparation method is high in efficiency, simple in preparation process and low in cost; and the prepared composite wave-absorbing material has the characteristics of high absorption of electromagnetic waves, wide absorption band and low density and the like, has good electromagnetic properties and stability, and has a significant application value in the fields of microwave absorption, electromagnetic shielding.

The invention relates to a molybdenum sulfide-ferrite nano-enzyme as well as a preparation method and an application method thereof. The preparation method comprises the following steps: uniformly mixing ferric chloride hydrate, magnesium chloride hydrate and dodecyl amine with a proper amount of ethylene glycol; enabling the components to react in a high-pressure reaction kettle, and repeatedly cleaning the product; drying the product so as to obtain ferrite magnesium; dissolving ammonium tetrathiomolybdate into dimethyl formamide; slowly adding hydrazine hydrate, and uniformly mixing; putting a proper amount of the ferrite magnesium into the mixed liquid; enabling the components to react in the high-pressure reaction kettle, and repeatedly cleaning the product; drying the product so as to obtain molybdenum sulfide-ferrite magnesium; putting the molybdenum sulfide-ferrite magnesium into a proper amount of TMB (Tetramethylbenzidine) and hydrogen peroxide-sodium acetate buffer solutionsof different concentrations; culturing, and testing the concentration of hydrogen peroxide. Results show that when being adopted to detect hydrogen peroxide, the molybdenum sulfide-ferrite magnesiumnano-enzyme is convenient and rapid to operate, high in sensitivity and wide in detection concentration range.

The invention relates to an iron oxide nanorod array material growing on a foamed titanium substrate and a preparation method of the iron oxide nanorod array material. According to the technical scheme, the method comprises the steps of mixing sodium sulfate, ferric chloride hexahydrate and deionized water according to the mass ratio of 7: 7: 7800 and stirring at the room temperature to obtain a mixed solution; transferring the mixed solution into a high-pressure reaction kettle, then immersing foam titanium subjected to ultrasonic cleaning by using a detergent, ethanol and deionized water into the mixed solution, and carrying out heat preservation at 160-170 DEG C for 4-7 hours to obtain a precursor; and putting the precursor into a tubular atmosphere furnace, and carrying out heat preservation for 2-3 hours at 430-470 DEG C in an argon atmosphere to prepare the iron oxide nanorod array material growing on the foamed titanium substrate. The method is simple in process, environmentallyfriendly and easy for industrial production, and the prepared product is high in specific capacity, good in rate capability and excellent in cycling stability.

The invention provides a preparation method of a Co2P / NPC electrocatalyst. The preparation method comprises the following steps: adding methyl orange into ultrapure water, adding ferric chloride hexahydrate (FeCl3.6H2O) under the condition of ice-water bath, sequentially adding pyrrole (C4H5N) and phosphonitrilic chloride trimer (NPCl2)3, carrying out stirring continuously for 24 hours under a dark condition, and carrying out suction filtration, washing and drying to obtain precursor polypyrrole; putting the polypyrrole into ultrapure water containing cobalt nitrate hexahydrate (Co(NO3)2.6H2O)for ultrasonic treatment, and letting the mixture to stand; carrying out centrifuging and drying, putting an obtained sample into ultrapure water containing dimethylimidazole (C4H6N2) for standing, and centrifuging, washing and drying the sample; and putting the sample in a tubular furnace, and calcining the sample at high temperature in an inert atmosphere to obtain the Co2P / NPC electrocatalyst.The catalyst has excellent oxygen reduction / precipitation electrocatalytic activity.

The invention provides a preparation method of a three-dimensional hierarchical structure tin oxide microballoon composite ferric oxide nanorod gas sensitive material. The preparation method comprisesthe steps of adopting stannic chloride pentahydrate as a raw material, adopting methyl alcohol as a solvent, adopting polyvinylpyrrolidone (PVP) as a surface active agent, adopting a traditional solvothermal method, and obtaining tin hydroxide with a uniform microballoon structure; adopting ferric chloride pentahydrate as a raw material, adopting a sodium sulfide pentahydrate as a reducing agent,attaching a ferric oxide nanorod on the surface, and finally obtaining the three-dimensional hierarchical structure tin oxide microballoon composite ferric oxide nanorod gas sensitive material. The method is simple in production process, the obtained tin oxide-ferric oxide composite gas sensitive material has a hollow and hierarchical structure, the specific surface area of the material is greatly increased, and the novel gas sensitive material with high sensitivity is obtained.

The invention relates to a method for preparing a flexible conductive composite material by regulating the arrangement of graphene by a magnetic field, and belongs to the technical field of development of the flexible conductive composite material. Prepare graphene oxide, ferrous chloride tetrahydrate, and ferric chloride hexahydrate aqueous solutions respectively, then blend and stir mechanically, add ammonia water dropwise to adjust the pH value, mechanically stir in a water bath, and centrifuge the mixed solution after cooling to separate the precipitated substances in the lower layer out, and dry to prepare magnetic graphene powder; ultrasonically disperse magnetic graphene powder and polymer in N,N-dimethylformamide, respectively, and then blend them evenly, add 3,3'-dichloro After ‑4,4'‑diaminodiphenylmethane, continue mechanical stirring, pour the mixture into a petri dish coated with a release agent, put it in a uniform magnetic field generated by a strong neodymium-iron-boron magnet, and then dry it in a vacuum A magnetic graphene / polymer flexible conductive composite was obtained. The invention has simple operation, simple and easy-to-obtain raw materials, and low preparation condition requirements.

The invention provides a magnetic Fe3O4@C / TiO2-In2O3 composite photocatalyst, a preparation method and an application. The preparation method comprises the following steps: yeast, ferric chloride hexahydrate, sodium acrylate and sodium acetate are added to an ethylene glycol / diethylene glycol mixed solution, the mixture is ultrasonically treated and magnetically stirred, after dissolution and uniform mixing, the mixture is transferred to a reactor equipped with a polytetrafluoroethylene lining for a solvothermal reaction, a solid product is washed and dried after the reaction, and Fe3O4@Cis obtained; Fe3O4@Cis dispersed in absolute ethyl alcohol, ultrasonic dispersion is performed, then In(NO3)3, tetrabutyl titanate and deionized water are added, the materials are magnetically and uniformly stirred, and a mixed solution is obtained and transferred to the reactor equipped with the polytetrafluoroethylene lining for the solvothermal reaction; a solid product is washed and dried after the reaction, and the magnetic Fe3O4@C / TiO2-In2O3 composite photocatalyst is obtained. The prepared material has good photocatalytic degradation effect on tetracycline.

The invention belongs to the field of hydrogen evolution energy, and particularly relates to a preparation method of a Fe2B-Co2B composite material-based sodium borohydride hydrolysis hydrogen production catalyst, which adopts a solid-phase reaction method, adopts a sodium chloride solid as a template, and comprises the following steps: mixing cobalt chloride hexahydrate, ferric chloride hexahydrate and urea, fully and uniformly grinding, and then reacting with strong reducing agent sodium borohydride to prepare a sodium borohydride water desorption hydrogen evolution composite material catalyst with excellent catalytic performance. The Co2BFe2B composite material prepared from the non-noble metal cobalt and iron which are rich in reserves and relatively cheap has relatively high sodium borohydride hydrolysis hydrogen desorption performance and excellent stability, and the solid-phase reaction method provides an effective synthesis thought for preparing an efficient and stable sodium borohydride hydrolysis hydrogen desorption non-noble metal catalyst.

The invention discloses a zinc ferrite hollow sphere with a micro-nano structure and a preparation method of the zinc ferrite hollow sphere, wherein the hollow sphere is a micro-sphere with the diameter of 1.5-3 microns and comprises zinc ferrite hollow spheres, the sphere diameter of the zinc ferrite hollow spheres is 180-220 nm, the sphere wall thickness of the zinc ferrite hollow spheres is 28-32 nm, and the sphere wall is composed of zinc ferrite nano-particles; the method comprises the following steps: respectively preparing a urea aqueous solution, a trisodium citrate dihydrate aqueous solution, a ferric chloride hexahydrate aqueous solution and a zinc nitrate aqueous solution; uniformly mixing the urea aqueous solution and the trisodium citrate dihydrate aqueous solution; and sequentially adding the ferric chloride hexahydrate aqueous solution and the zinc nitrate aqueous solution into the obtained mixed solution, uniformly mixing, carrying out closed reaction on the obtained precursor solution at 120-180 DEG C, and sequentially carrying out solid-liquid separation, washing and drying treatment on the obtained reaction solution to obtain the target product. The material is uniform in size and large in specific surface area, and can be easily and widely commercially applied to the fields of photoconductive materials, water treatment, surface enhanced Raman scattering, sensors and the like.

The invention relates to a biomass-based graphene material and a preparation method thereof.The preparation method comprises the steps that firstly, biomass and ferric chloride hydrate are mixed and smashed, and a smashed material is obtained; and sequentially carrying out pre-carbonization, pyrolysis, pickling and washing on the crushed material to obtain the biomass-based graphene material. Compared with the prior art, the universal, simple and extensible solvent-free shearing / pyrolytic graphitization process adopted by the invention avoids the inherent problems of chemical vapor deposition and epitaxial growth methods, and is expected to pave a way for large-scale production and industrial application of graphene materials.

The invention discloses a material for measuring microcosmic hot spots in a microwave field, which is prepared by the following steps: dissolving ferric chloride pentahydrate and terephthalic acid in N, N-dimethylformamide, stirring and carrying out ultrasonic treatment, and carrying out hydrothermal reaction; the iron-based metal frame material particles are placed in a tubular furnace, the material is roasted in the air environment, and then the material is further roasted in the nitrogen environment; the preparation method comprises the following steps: uniformly dispersing nano carbon particles in an N, N-dimethylformamide solution; adding biphenyl tetracarboxylic acid; adding a mixed solution of europium nitrate hexahydrate and terbium nitrate hexahydrate; stirring, carrying out hydrothermal reaction in an oil bath pan, and carrying out centrifugal separation; after the reaction is finished, the obtained particle fluorescence spectrum characteristic peak is sensitive to the temperature change, so that the real temperature of the particle in the microwave heating process can be calculated by capturing the fluorescence spectrum. According to the invention, the problem of measuring the micro-scale temperature in a microwave field is solved, and quantitative measurement of the microwave-induced micro-scale local overheating phenomenon can be realized.

The invention provides a sewage dephosphorizing agent, a preparation method and application thereof. The sewage dephosphorizing agent comprises a substrate containing polyacrylamide, and an aluminum salt and an iron salt which are loaded on the substrate, wherein the aluminum salt is selected from hydrated aluminum sulfate or aluminum sulfate, and the iron salt is selected from ferric chloride hydrate or ferric chloride. The sewage dephosphorizing agent provided by the invention can effectively treat phosphorus-containing sewage, has high dephosphorizing efficiency, can also effectively reducethe COD value in water and remove nitrogen in the water, can be widely applied to the fields of industrial wastewater treatment, domestic wastewater treatment and the like, and is convenient to use,small in dosage and rapid in reaction. The experiment results show that when the total phosphorus (TP) in raw water is 7.5 mg / L and the total nitrogen (TN) in the raw water is 88.5 mg / L, the removal rate of the TP is not lower than 87.05% and the removal rate of the TN is not lower than 83.02% by adding the sewage dephosphorizing agent with the concentration of 60 mg / L.

The invention provides a petroleum asphalt / ferric oxide composite wave absorbing agent, a preparation method thereof, and a wave absorbing material, which belong to the technical field of electromagnetic wave absorbing materials. In the present invention, after the petroleum asphalt and sodium chloride are pyrolyzed, the pyrolyzed asphalt obtained is a hydrocarbon rich in polycyclic aromatic hydrocarbons and has a porous nanosheet structure, which is conducive to improving the conductivity of the petroleum asphalt, and then combined with six Ferric chloride hydrate undergoes solvothermal reaction, and iron ferric oxide nanoparticles are formed during the solvothermal reaction process, which can effectively and stably modify petroleum asphalt. The conductive loop further enhances the magnetic loss performance of the composite material itself.

A method for efficiently treating deltamethrin wastewater, relating to a method for treating chemical wastewater, Zn 0.99 Fe 0.01 The preparation of O photocatalytic materials uses zinc nitrate hexahydrate, ferric chloride hexahydrate, citric acid, sodium citrate and potassium hydroxide as materials by co-precipitation method, and undergoes a process of stirring and mixing, precipitation, washing, drying, grinding and calcination Steps to prepare. Photocatalyst Zn 0.99 Fe 0.01 O can significantly increase the photodegradation rate of deltamethrin. Under the irradiation of 125W high-pressure fluorescent mercury lamp, when the initial concentration of deltamethrin is 100 mg / L, Zn 0.99 Fe 0.01 When the mass concentration of O was 1.0g / L, the reaction temperature was 30℃, the pH value was 7.38, and the reaction time was 6h, the removal rate of deltamethrin wastewater was over 90%. The method has the advantages of simple process, no secondary pollution to the environment, wide source of raw materials, cheap price, easy industrialization, and easy and rapid conversion and application.

The invention discloses a preparation method of an environment-friendly algae-removing coagulant. The preparation method is as follows: (1) taking aluminum chloride hexahydrate, ferric chloride hexahydrate and cerium trichloride hexahydrate respectively after sieving Powder, mixed evenly, heated for one roasting, air cooling, mixed with iridium trichloride, second roasting, air cooling; (2) Add deionized water to the roasted powder to react until dark brown polymer is formed and air cool to room temperature Stop stirring to obtain the crude coagulant; (3) Configure an aqueous solution of sodium hydroxide, soak the crude coagulant in the aqueous solution of sodium hydroxide, stir rapidly, then add iron oxide powder and hydrogen peroxide sequentially therein, and the feeding is completed Then continue to stir, stand at room temperature for more than 20h, and freeze-dry to obtain the coagulant. The algae-removing coagulant prepared by the invention has good algae-removal effect, less water pollution, and is suitable for primary treatment of water body pollutants.

The invention relates to a preparation method of molybdenum sulfide-ferrite nanozyme and its application. It includes the following steps: dissolve ferric chloride hydrate, magnesium chloride hydrate and dodecylamine in an appropriate amount of ethylene glycol and mix them; wash the product repeatedly after reacting in a high-pressure reactor; dry to obtain ferrite magnesium; take molybdenum tetrathio Dissolve ammonium acid in dimethylformamide; slowly add hydrazine hydrate and mix; add an appropriate amount of magnesium ferrite to the aforementioned mixed solution; wash the product repeatedly after the reaction in a high-pressure reactor; dry it to obtain molybdenum sulfide-ferrite Magnesium; add molybdenum sulfide-ferrite magnesium to an appropriate amount of TMB and different concentrations of hydrogen peroxide in acetic acid-sodium acetate buffer; measure the concentration of hydrogen peroxide after incubation. The results prove that the molybdenum sulfide-magnesium ferrite nanozyme is convenient and fast for detecting hydrogen peroxide, with high sensitivity and a wide detection concentration range.

The invention relates to a copper-iron double-metal cluster-organic silicon oxide bundle as well as a preparation method and application thereof. The preparation method comprises the following steps: dissolving a nonionic block copolymer F127 in deionized water, and assembling to obtain an F127 micelle aqueous solution; adding a proper amount of ammonia water and a sulfydryl silane coupling agent into the aqueous solution to obtain sulfydryl-functionalized organic silicon oxide bundles; adding a ferric chloride hexahydrate solution to reduce the iron ions in a confinement manner to obtain an iron cluster-organic silicon oxide beam, and then adding a copper chloride dihydrate solution to further reduce the copper ions in a confinement manner to obtain the copper-iron bimetallic cluster-organic silicon oxide nano therapeutic agent. The dynamic particle size of the copper-iron bimetallic cluster modified organic silica gel bundle is smaller than 30 nm, the copper-iron bimetallic cluster modified organic silica gel bundle has good biological stability and dilution resistance, and the preparation method is simple. In addition, the catalytic treatment effect of tumors can be remarkably improved based on a copper-iron synergistic catalytic mechanism, and the copper-iron-based copper-iron composite material has huge application potential in the fields of biological medicine and nano-catalytic treatment.

The invention discloses an attapulgite-based acidic soil conditioner and a preparation method thereof. Attapulgite and soda lime are used as main raw materials, enteromorpha and a doped graphite phase carbon nitride-molybdenum dioxide compound are used as auxiliary materials, the conditioner is prepared, and the pH of acidic soil can be greatly increased with a low application amount. The doped graphite phase carbon nitride-molybdenum disulfide compound is prepared by the following method: firstly, preparing doped graphite phase carbon nitride from urea, ferric chloride hexahydrate and succinic acid, then adding the doped graphite phase carbon nitride into a sodium molybdate-thioacetamide mixed aqueous solution, and carrying out hydrothermal reaction to obtain the doped graphite phase carbon nitride-molybdenum disulfide compound. The soil conditioner prepared by the invention can be used for improving the pH value of acid soil at a relatively low application amount.

The invention discloses a preparation method of a Fe-coated SiO2 catalyst, which comprises the following steps: uniformly mixing 2-aminoterephthalic acid, ferric chloride hexahydrate and N, N-dimethylformamide according to a certain mass ratio to obtain a first mixed solution; keeping the temperature of the first mixed solution at 140-160 DEG C to obtain a dark brown mixture; adding N, N-dimethylformamide into the dark brown mixture, stirring and washing, centrifugally filtering, and drying in vacuum to obtain a first solid object; uniformly mixing the first solid object, a sodium hydroxide solution, cetyltrimethylammonium bromide, tetraethoxysilane, methanol and water according to a mass ratio of (10-40): (6-10): (2-8): (0.4-1.6): (2-8): (150-250) to obtain a second mixed solution; addingethanol into the second mixed solution, stirring and washing, centrifugally filtering, and drying in vacuum to obtain a second solid object; and firing the second solid object at a high temperature of 700-900 DEG C for 1-5h, introducing inert gas, and standing in a sodium hydroxide solution for 12-24h to obtain the Fe-coated SiO2 catalyst.

The invention discloses a cigarette capable of indicating the color change in a smoking process as well as an indication method and use of the cigarette, belonging to the technical field of cigarettes. According to the method, ferric chloride hydrate is added into the cigarette, and the weight ratio of the ferric chloride hydrate to tobaccos in the cigarette is 0.05%-0.4%. According to the methodfor indicating the smoking process of the cigarette, phenols produced in the smoking process of the cigarette are authenticated by virtue of trivalent iron ions, and different colors are presented along the smoking progress, so that a customer can relatively visually feel the tar content produced in the smoking process. The method is simple, special equipment does not need to be used, and the selected materials are safe and environment-friendly.

The invention discloses an environment-friendly deplating agent as well as a preparation method and a use method thereof. Each liter of the environment-friendly deplating agent comprises 20-100g of sodium persulfate, 100-300mL of concentrated sulfuric acid, 2-10g of ferric chloride hexahydrate, 0.005-0.1 g of a wetting agent, 1-10g of an imidazole slow release agent, 1-10g of citric acid and water as a solvent. The environment-friendly deplating agent is safe, environmentally friendly and low in use temperature (30-40 DEG C), and has the characteristics of being clean in deplating, free of corrosion to a matrix and high in deplating speed; sodium persulfate and ferric chloride hexahydrate are adopted as main substances for dissolving a nickel layer, then an imidazole slow-release agent and citric acid are added, the nickel stripping effect is guaranteed, meanwhile, copper or copper alloy of a metal base material cannot be corroded, and the copper corrosion speed is smaller than 0.33 micrometer / min; besides, in the production process of existing printed circuit boards, plastic antenna oscillators and other products, a palladium layer is further arranged between the base material and the nickel plating layer, and after the environment-friendly deplating agent finishes deplating of the nickel plating layer, the palladium layer between the base material and the nickel plating layer can also be deplated.

The invention provides a nickel-doped iron-based bimetallic non-noble metal catalyst and a preparation method thereof. According to the non-noble metal-based catalyst, SBA-15 is used as a hard template, sucrose is used as a carbon source, melamine is used as a nitrogen source, ferric chloride hexahydrate is used as an iron source, and nickel chloride hexahydrate is used as a nickel source, and then high-temperature carbonization treatment is performed to obtain the FeNi / N-C catalyst. Compared with single-metal Fe-N / C and Ni-N / C materials, the bimetallic FeNi-N / C material prepared by the preparation method disclosed by the invention plays a synergistic role between iron and nickel bimetals and between the iron and nickel bimetals and a defective carbon material, so that a nickel-doped iron-based bimetallic catalyst has high oxygen evolution performance and even exceeds a commercial RuO2 catalyst. The electrocatalyst has the characteristics of low cost and high performance, which greatly promotes the commercialization process of an electrolytic hydrogen production system.

The invention discloses a Fe@SiO 2 The preparation method of catalyst comprises the steps of: mixing 2-aminoterephthalic acid, ferric chloride hexahydrate and N,N-dimethylformamide according to a certain mass ratio to obtain the first mixed liquid; solution at 140-160°C, heat preservation to obtain a dark brown mixture; add N,N-dimethylformamide to the dark brown mixture, stir and wash, centrifugal filter, and vacuum dry to obtain the first solid object; the above first solid Object, sodium hydroxide solution, cetyltrimethylammonium bromide, tetraethyl orthosilicate, methanol and water are (10‑40): (6‑10): (2‑8): ( 0.4-1.6): (2-8): (150-250) mix uniformly to obtain the second mixed solution; add ethanol to the second mixed solution, stir and wash, centrifuge and vacuum dry to obtain the second solid object; Two solid objects were fired at a high temperature of 700-900°C for 1-5h, passed through an inert gas, and stood in a sodium hydroxide solution for 12-24h to obtain Fe@SiO 2 catalyst.

The invention provides a Co 2 Preparation method of P / NPC electrocatalyst. Methyl orange was added to ultrapure water, and ferric chloride hexahydrate (FeCl 3 ·6H 2 O), followed by addition of pyrrole (C 4 h 5 N) and hexachlorotripolyphosphazene (NPCl 2 ) 3 , continuously stirred for 24 hours in the dark, filtered, washed and dried to obtain the precursor polypyrrole. Polypyrrole was placed in a solution containing cobalt nitrate hexahydrate (Co(NO 3 ) 2 ·6H 2 O) ultrapure water ultrasonication, static; then after centrifugation, drying, the obtained sample was placed in dimethylimidazole (C 4 h 6 N 2 ) in ultrapure water, centrifuged, washed and dried. Then the sample was calcined in a tube furnace at high temperature in an inert atmosphere to obtain a Co 2 P / NPC electrocatalyst, which has excellent electrocatalytic activity for oxygen reduction / evolution at the same time.

The present invention provides a magnetic Fe 3 O 4 @C / TiO 2 ‑In 2 O 3 Composite photocatalyst and its preparation method and use. The preparation steps are as follows: add yeast, ferric chloride hexahydrate, sodium acrylate, and sodium acetate to the ethylene glycol / diethylene glycol mixture, ultrasonic treatment, magnetic stirring, and wait until dissolved. After homogenization, transfer to a polytetrafluoroethylene-lined reactor for solvothermal reaction. After the reaction is completed, the solid product is washed and dried to obtain Fe 3 O 4 @C; will Fe 3 O 4 @C is dispersed in absolute ethanol, dispersed by ultrasonic, and then In(NO 3 ) 3 , tetrabutyl titanate and deionized water, magnetically stir evenly to obtain a mixed solution, transfer the mixed solution to a polytetrafluoroethylene-lined reactor for solvothermal reaction; after the reaction is completed, wash the solid product and dry it. Obtain magnetic Fe 3 O 4 @C / TiO 2 –In 2 O 3 Composite photocatalyst. The material prepared by the invention has good photocatalytic degradation effect on tetracycline.

The invention discloses a preparation method of a corrosive liquid for simulating a special climatic environment as well as the corrosive liquid and application of the corrosive liquid. The preparation method of the corrosive liquid comprises the following steps: a, sequentially adding 0.1-0.5 g of copper nitrate trihydrate, 0.4-0.8 g of ferric chloride hexahydrate, 2.0-5.0 g of anhydrous ammonium sulfate and 30-55g of sodium chloride into deionized water, and stirring until the materials are fully dissolved; b, 10-30 g of kaolin and 0.5-3.0 g of lauryl sodium sulfate are continuously added and slowly stirred to be uniform, and deionized water is used for fixing the volume to 1 L; and c, adjusting the pH value to 3.2-3.5 by using a plurality of drops of 10-20% by volume of acetic acid solution to obtain the corrosive liquid, and storing in a dark place. The corrosion liquid prepared by the invention is combined with an existing evaluation device to accurately simulate the corrosion risk of a part in a special climate environment region, so that effective identification and correction are performed in a test stage.

A nitrogen oxide absorption slurry and its preparation and use method for the removal of nitric oxide in gas streams, belonging to the technical field of air pollution control and related environmental protection, is characterized in that the absorption slurry contains one or more compounds of anhydrous ferric chloride, ferric chloride monohydrate, ferric chloride dihydrate and the complex of ferric chloride and chloride ions. The absorption slurry reacts with the nitric oxide in gas stream at a certain temperature, so that the nitric oxide in the gas stream is absorbed by the slurry, thereby achieving the purpose of gas purification. And the absorbent can be recycled after regeneration.

The invention discloses a zinc ferrite hollow sphere with a micro-nano structure and a preparation method thereof. The hollow sphere is composed of zinc ferrite hollow spheres with a diameter of 1.5-3μm. Among them, the diameter of the zinc ferrite hollow sphere is 180-220nm, the thickness of the ball wall is 28-32nm, and the ball wall is composed of zinc ferrite nanoparticles; The method is to first prepare urea aqueous solution, trisodium citrate dihydrate aqueous solution, ferric chloride hexahydrate aqueous solution and zinc nitrate aqueous solution respectively, and then mix the urea aqueous solution and trisodium citrate dihydrate aqueous solution evenly, and successively mix ferric chloride hexahydrate The aqueous solution and the zinc nitrate aqueous solution are added to the obtained mixed solution and mixed evenly. After that, the obtained precursor solution is placed at 120-180°C for closed reaction, and then the obtained reaction solution is sequentially subjected to solid-liquid separation, washing and drying. target product. Its uniform size and large specific surface area make it extremely easy to be widely commercialized in the fields of photoconductive materials, water treatment, surface-enhanced Raman scattering and sensors.

The invention discloses a surface non-polar modification method of sepiolite mineral powder and application of the sepiolite mineral powder in plastic or rubber filler. The preparation method comprises the following steps: performing wet modification on sepiolite mineral powder by taking palmitic acid as a non-polar modifier and absolute ethyl alcohol as a solvent, and performing heterogeneous esterification reaction on surface hydroxyl of the sepiolite mineral powder and carboxyl of palmitic acid molecules in a normal-temperature water medium by virtue of a catalyst ferric chloride hexahydrate to form an ester bond; and grafting palmitic acid chains on the surfaces of the particles, so that the surfaces of the particles are non-polarized. The non-polar modified formula provided by the invention is simple in components, low in cost and free of toxic and side effects; the prepared surface non-polarized sepiolite mineral powder is stable in performance and obvious in modification effect, and can be widely applied to plastic rubber fillers.