47results about How to "Strong reduction" patented technology

The invention relates to a metal additive modified Pt-loaded CeO2 catalyst, preparation and application thereof in CO oxidation, and belongs to the technical field of industrial catalysis. The preparation process of the catalyst mainly comprises the following steps: respectively dissolving cerium salt, platinum salt and auxiliary metal salt in deionized water to prepare corresponding precursor solutions; then, mixing the three solutions, and dropwise adding ammonia water under a stirring condition until yellow precipitates are generated; and finally, drying and washing the precipitate, and calcining the solid powder in a proper atmosphere to obtain the assistant metal modified Pt / CeO2 catalyst. La, Pr, Nd or Sm auxiliary metal is introduced into the Pt / CeO2 catalyst, so that the CO catalytic oxidation performance of the catalyst can be improved, and the poisoning resistance of the catalyst in an SO2-containing environment can be enhanced. The method has important significance in the actual industrial application, especially in the catalytic oxidation process under the condition of treating complex flue gas.

The invention discloses a sulfur-rich vacancy ZnIn2S4 at FeNi < 0.48 > S < 1.71 > heterojunction photocatalyst as well as a preparation method and application thereof, and the photocatalyst is a sulfur-rich vacancy ZnIn2S4 at FeNi < 0.48 > S < 1.71 > heterojunction composite material with a hollow structure, which is formed by in-situ growth of a sulfur-vacancy-containing ZnIn2S4 nanosheet on the surface of a FeNi < 0.48 > S < 1.71 > hollow nanosphere. The photocatalyst provided by the invention has a larger specific surface area and a wider light absorption range, and the internal sulfur vacancy as an electron capture center can inhibit the compounding of photo-induced electron-hole pairs. The three-dimensional core-shell hollow sphere structure can reduce the recombination rate of charges, improve the mobility of electrons, show better photocatalytic performance, and have great application prospects in the fields of energy and environment.

The invention discloses application of AgNWs (at) CdZnS2 (at) Cd, Zn-ZIF-8 core-shell structure in photocatalysis and extraction of uranium from seawater, and a method comprises the following steps: filling propylene glycol containing PVP into a bottle, and magnetically stirring and heating in an oil bath; the preparation method comprises the following steps: firstly, adding NaCl into the mixed solution, continuously stirring, adding an AgNO3 solution, magnetically stirring and heating the mixed solution, collecting precipitates, and washing the precipitates with acetone and ethanol respectively to obtain gray AgNWs; the preparation method comprises the following steps: adding 2-methylimidazole into an organic solvent solution containing organic amine, mixing AgNWs, adding into an organic solvent solution of cadmium salt and zinc salt, stirring at room temperature, standing, and carrying out solid-liquid separation to obtain AgNWs (at) ZIF8; the preparation method comprises the following steps: adding AgNWs (at) ZIF8 into an organic solvent, dropwise adding an organic solvent solution of the AgNWs (at) ZIF8 into the organic solvent containing thiourea in a grinding process, heating the mixture in a water bath, carrying out vacuum drying at room temperature, and cooling to room temperature after the reaction is finished, so as to obtain the AgNWs (at) CdZnS2 (at) Cd, Zn-ZIF-8 photocatalytic material. According to the invention, AgNWs (at) ZIF8 is used as a precursor to prepare an AgNWs (at) CdZnS2 (at) Cd, Zn-ZIF-8 core-shell structure, and the core-shell structure has excellent ability to extract uranium from seawater.

The present invention relates to the field of microbial technology, and provides a fermented mucus lactobacillus YYS-K2 and an application thereof. The deposit number of the fermented mucus lactobacillus YYS-K2 is CGMCC No.27129. The fermented mucus lactobacillus YYS-K2 can produce ethanol dehydrogenase (ADH), has good ethanol tolerance and degradation ability, can grow in a high-concentration ethanol culture medium, and at the same time, the bacteria has a significant inhibitory effect on α-amylase inhibition, has significant OH and DPPH free radical scavenging ability, and has good reducing ability. The bacteria can provide a new probiotic source for the development of functional products such as hangover products, antioxidant products and weight loss products (α-amylase inhibition functional products), and has important application value.

The invention relates to the technical field of production of titanium dioxide by a sulfuric acid method, and discloses a composite reduction bleaching method for metatitanic acid in titanium dioxide by a sulfuric acid method, which comprises the following steps: taking metatitanic acid slurry, adding water to adjust the concentration of titanium dioxide, and heating and stirring; adding concentrated sulfuric acid for acidification; adding trivalent titanium to carry out reduction reaction; after the titanium trivalent reaction is finished, the pH value of the slurry is adjusted before thiourea dioxide is added; adding thiourea dioxide; after thiourea dioxide is added, the redox potential of the slurry is controlled within the range of 200 mV to 400 mV by supplementing a reducing agent, and the redox potential is maintained for 10-20 minutes; introducing inert gas for protection during a potential maintaining period; and carrying out solid-liquid separation and hot water washing to obtain bleached metatitanic acid. According to the present invention, the trivalent titanium and the thiourea dioxide are adopted to construct the composite reduction system so as to achieve the synergy of the strong reduction ability and the lasting reduction environment, such that the production cost of the bleaching process is reduced on the premise of the significant reduction of the trivalent titanium and the thiourea dioxide consumption.

The utility model relates to the technical field of environment-friendly cement production, and discloses a hexavalent chromium powdery reducing agent feeding device for cement production, which comprises a ball mill, and a raw material hopper is arranged above an inlet of the ball mill; a wind turbine is mounted at one end of the wind conveying pipe, and the other end of the wind conveying pipe is connected to the feeding end of the powder concentrator; the discharge end of the ball mill is communicated with the pneumatic conveying pipe; the joint of a material pipe at the bottom of the reducing agent bin and the pneumatic conveying pipe is located between the discharging end of the ball mill and the feeding end of the powder concentrator; and a fine powder discharge port of the powder concentrator is connected to a cement bunker. The mixing of the reducing agent and the cement powder is mainly carried out in the pneumatic conveying pipe and the powder concentrator, especially in the pneumatic conveying pipe, so that the problem that the reducing agent is oxidized due to overhigh temperature in the process of directly introducing the reducing agent into the ball mill and grinding the reducing agent together with cement clinker or a mixture can be avoided; and it is ensured that the reducing agent has higher reducibility and can effectively reduce hexavalent chromium in cement.

The present invention belongs to the technical field of environmental functional materials, and specifically relates to a zero-valent iron-manganese bionic coral island and its preparation method and application. The zero-valent iron-manganese bionic coral island described in the present invention utilizes biomass raw materials as carbon precursors, uses zinc chloride as the main pore-forming agent, and adds ferric chloride and manganese chloride as auxiliary pore-forming agents and iron-manganese precursors. It is prepared by a one-step carbon thermal reduction method under an inert atmosphere, and finally obtains a zero-valent iron-manganese bimetallic nanorod array wrapped with a layer of graphitized carbon film and uniformly grown on the surface of porous biocarbon. The zero-valent iron-manganese bionic coral island described in the present invention has excellent catalytic H2O2 performance and reduction dehalogenation ability, can achieve efficient degradation of organic pollutants in water, especially halogenated organic pollutants, can be used for the effective remediation of organic pollutants in wastewater, groundwater and contaminated soil, and has broad application prospects.

The invention belongs to the field of solid electrolytes, and particularly relates to a PVDF (polyvinylidene fluoride)-based organic-inorganic composite polymer solid electrolyte as well as a preparation method and application thereof. The solid electrolyte comprises PVDF, a lithium salt, an active filler and an organic additive, the mass ratio of the PVDF to the lithium salt is (1-20): 1, the ratio of the total mass of the PVDF and the lithium salt to the mass of the active filler is (3-30): 1, the ratio of the total mass of the PVDF and the lithium salt to the mass of the organic additive is (2-20): 1, and the organic additive is a hydrazine compound. According to the invention, the hydrazine organic small molecule additive is introduced, so that the ionic conductivity of the PVDF-based organic-inorganic composite solid electrolyte at near room temperature can be effectively improved. The small organic molecules and the lithium salt form a high-performance interface layer in situ, so that the interface compatibility of the organic-inorganic composite solid electrolyte and the lithium metal is remarkably improved, and the mechanical strength of the organic-inorganic composite solid electrolyte is improved.

The invention discloses a beneficiation process for beneficiation and recovery of scheelite and fluorite from argillized tungsten polymetallic ore. The beneficiation process sequentially comprises the steps of magnetite removal, low-intensity magnetic separation mineral removal, sulphide ore removal through acidification, scheelite-fluorite mixed concentration and centrifugal separation to obtain scheelite concentrate and fluorite concentrate. By adopting magnetic separation and flotation operation, corrosion to equipment can be reduced, meanwhile, the grade and the recovery rate of the scheelite concentrate and the fluorite can be improved, and under the condition that the strong magnetic tailings contain 0.34% of tungsten and 25.65% of fluorite, the scheelite concentrate with the tungsten content of 17.96% and the accumulative recovery rate of 20.42% can be obtained through tests; the content of fluorite in the fluorite concentrate is 77.86%, and the accumulative recovery rate is 47.72%.

The invention discloses a method for enhancing degradation of organic pollutants by using acid-modified hydrothermal carbon, which comprises the following steps: adding acid-modified hydrothermal carbon into a degradation system constructed by ferric salt and persulfate to degrade the organic pollutants in a water body, wherein the acid-modified hydrothermal carbon is prepared by taking biomass and an inorganic acid solution as raw materials and carrying out hydrothermal carbonization treatment. In the method disclosed by the invention, the adopted acid modified biochar has the advantages of rich surface oxygen-containing functional groups, multiple reducing components, rich pore structure, large pore diameter, large specific surface area and the like, shows very excellent adsorption capacity and catalytic reduction capacity on specific pollutants and Fe (III), and can obviously enhance the Fe (III) / Fe (II) circulation effect in a system; different types of organic pollutants in different environment media can be efficiently removed, the utilization rate of ferric salt can be remarkably increased, the treatment cost can be reduced, Fe (III) flocculent precipitation can be remarkably reduced, and the method is more environmentally friendly.

The application belongs to the field of semiconductor chip assembly, and particularly relates to a method for eutectic sintering of semiconductor chips. The method uses formic acid as a protective agent during eutectic sintering, and scientifically sets the eutectic sintering temperature rising and constant temperature programs, so that heat can be effectively and uniformly transferred to the solder and the chip, the solder can be stably melted, the formation of voids is reduced, and the adverse effects of the voids on the qualified rate of the solder piece are reduced.

The invention belongs to the technical field of environment and food pollution detection, and particularly relates to a method for detecting neonicotinoid pesticide residues by constructing a dual mode based on waste tobacco-based biomass carbon dots. According to the method, waste tobacco byproducts (such as leaves and stems) are used as raw materials to synthesize the waste tobacco-based biomass carbon dots (CDs), and the carbon dots have oxidase-like (OD) and peroxidase-like (POD) activities. On the basis, imidacloprid (IMI) is used as a neonicotinoid pesticide model; two detection modes of ultraviolet spectrum absorbance and fluorescence spectrum fluorescence intensity driven by OD-like and POD-like enzyme activity based on the waste tobacco-based biomass carbon dots are established for efficient, low-cost and environment-friendly detection of neonicotinoid pesticide residues in medicinal and edible samples such as Chinese wolfberry, honeysuckle and pseudo-ginseng. The advantages of a colorimetric method and a fluorescence method are integrated, double-ratio built-in reference is adopted, the false positive phenomenon caused by external signal interference is effectively avoided, meanwhile, the detection sensitivity and specificity are enhanced, and false negative is avoided.

The present invention provides a method and device for treating pollutants in water with aluminum alloy particles. The method comprises the following steps: 1) melting metal aluminum and adding a catalyst, and casting the molten alloy liquid into aluminum alloy particles; 2) adding the aluminum alloy particles into a sewage treatment device, adding sewage to react, and 3) after the reaction is complete, filtering the reaction mixture to obtain clean water, and the aluminum alloy particles that have not reacted completely are used for the next water treatment. The aluminum alloy particles used in the present invention have strong reducing ability, can continuously react with deionized water without passivation, can reduce and decompose organic waste in sewage; inorganic waste is reduced to low-valent non-toxic ions, and has a wide range of applicable pH values ​​for sewage. Aluminum hydroxide is generated during the reaction, which acts as a flocculant, adsorbing and settling suspended matter in sewage. It has a better comprehensive water treatment effect.

The invention belongs to the technical field of water treatment, and provides an environment-friendly phosphorus-free nitrogen-free scale and corrosion inhibition dispersing agent as well as a preparation method and application of the environment-friendly phosphorus-free nitrogen-free scale and corrosion inhibition dispersing agent. The environment-friendly phosphorus-free nitrogen-free scale and corrosion inhibition dispersing agent is prepared from 18 to 22 parts of itaconic acid-hydroxyethyl acrylate copolymer, 20 to 30 parts of polyepoxysuccinic acid, 90 to 110 parts of sodium gluconate and 7 to 10 parts of zinc sulfate heptahydrate. The product provided by the invention has the advantages of small dosage, excellent scale inhibition, dispersion, corrosion inhibition, biodegradation and the like, excellent comprehensive performance, no phosphorus and no nitrogen, and avoids the problem of water eutrophication caused by long-term use of medicaments.

The invention relates to the technical field of waste foamy copper recovery, in particular to a method for recycling waste foamy copper and application of the method. The method comprises the following steps: mixing hydrazine hydrate with deionized water to obtain a diluted desulfurization solution; sulfur powder and the diluted desulfurization solution are stirred and mixed for the first time, and a sulfuration solution is obtained; cleaning the surface of the waste foamy copper to obtain surface-treated foamy copper; the vulcanization solution and the surface treatment foamy copper are stirred and mixed for the second time, then vacuum drying is conducted, and a crude product mixture containing Cu and Cu7S4 is obtained; grinding the crude product of the crude product mixture under an inert atmosphere condition to obtain a mixture; wherein the temperature of the second stirring and mixing is 15-35 DEG C, and the time of the second stirring and mixing is 5-6 minutes. According to the method, a large amount of CuxS bionic enzyme products or lithium ion battery anode products can be rapidly prepared from the mixture containing Cu and Cu7S4 under the condition of relatively low energy consumption.

The invention relates to the technical field of new energy, in particular to a composite current collector assembly and a preparation method thereof, a pole piece assembly and a preparation method thereof and a battery. The composite current collector assembly comprises an insulating layer, a conductive layer and a weld-aid coating, the conductive layer is located on at least one side of the insulating layer, the conductive layer comprises an electrode active area and a tab blank area connected with the electrode active area, and the weld-aid coating is located on the conductive layer corresponding to the tab blank area. The raw materials of the weld-aid coating comprise modified rosin, organic acid, organic amine, a wetting agent, a surface active agent and a corrosion inhibitor. By selecting the raw materials of the weld-aid coating, the traditional transfer welding procedure can be omitted, the problem that the welding process is tedious is solved, and the welding quality is good.

The invention relates to a bismuth-based adsorption material and a preparation method and application thereof, and relates to the technical field of waste gas treatment, and a bismuth-based adsorption material finished product Bi (at) AC for adsorbing gaseous iodine is obtained through the steps of AC carrier pretreatment, homogeneous phase A liquid preparation, homogeneous phase B liquid preparation, Bi (at) AC preparation and the like. The preparation method has the advantages that absolute ethyl alcohol is used as a solvent, ethylene glycol is used as a reducing agent, Bi (NO3) 3.5 H2O is used as a modifier, a solvothermal one-step synthesis simple method is adopted, and metal active sites are provided for activated carbon through loading of a bismuth-based material in a bismuth modification mode; the original single physical adsorption of activated carbon is converted into adsorption of physical action and active site chemical action of an activated carbon pore structure, so that the adsorption performance of gaseous iodine is improved, a complex and high-energy-consumption pyrolysis method is omitted, the preparation period is short, and no toxic gas is released in the preparation process.

The application discloses a catalyst, a preparation method thereof, and a process and equipment for synthesizing NS by oxidation. The activated carbon loaded composite catalyst claimed by the application comprises a main catalyst and an auxiliary catalyst, wherein the main catalyst is 2,4,6-trihydroxy pyrimidine, and the auxiliary catalyst is one or both of stannous oxide and palladium suboxide. In the application, the main catalyst and the auxiliary catalyst can be more adsorbed in the pore structure of activated carbon, and in the process of synthesizing rubber accelerator NS by oxidation, the reaction time of the reaction of synthesizing rubber accelerator NS by oxidation can be effectively shortened.

The present application provides an electrolyte, an electrochemical device and an electronic device, wherein the electrolyte comprises lithium bis(fluorosulfonyl)imide, a sulfur-containing compound and propyl propionate, wherein the mass percentage of lithium bis(fluorosulfonyl)imide is A%, the mass percentage of the sulfur-containing compound is B%, and the mass percentage of propyl propionate is D%, based on the mass of the electrolyte, and 0.3≤B / A≤4, 30≤D≤40. The above arrangement is conducive to reducing the risk of increased AC impedance of the electrochemical device under high voltage and improving the anti-drop performance and intermittent cycle performance of the electrochemical device.

The present invention discloses a method for resource utilization of lead-zinc ore waste rock, comprising the following steps: S1, crushing the lead-zinc ore waste rock to obtain low-quality dolomite; or roasting the lead-zinc ore waste rock, crushing it after roasting to obtain low-quality light-burned dolomite; S2, mixing iron ore powder, return ore, flux and coke powder to obtain sintering raw materials; wherein: the flux contains low-quality dolomite or low-quality light-burned dolomite; S3, mixing the sintering raw materials to obtain pre-mixed materials; S4, granulating the mixed materials to obtain granulated materials; S5, distributing the granulated materials in a sintering cup, igniting, sintering, and then cooling, crushing and screening to obtain a finished sintered ore. The present invention uses lead-zinc ore waste rock to prepare dolomite and light-burned dolomite products for sintering, and only mechanical crushing is required to prepare low-quality dolomite, or low-quality light-burned dolomite can be fired using a conventional roasting process, and the process flow is simple, the production cost is low, and it has high technical and economic feasibility.

The embodiment of the invention provides a composite hydrogel precursor fluid, a preparation method and application thereof, and a preparation method of anti-swelling medical hydrogel, and belongs to the field of biomedical engineering. The preparation method comprises the following steps: S1, providing a silk fibroin solution, wherein the silk fibroin solution is an aqueous solution of 4-(4-hydroxymethyl-2-methoxy-5-nitrophenoxy) butyric acid modified silk fibroin; s2, the tannic acid solution and the silk fibroin solution are mixed, a mixed solution is obtained, and tannic acid in the tannic acid solution is evenly distributed in the mixed solution; and S3, adding N-isopropylacrylamide and polylysine into the mixed solution, and uniformly mixing to obtain the composite hydrogel precursor liquid. Polylysine, tannic acid and N-isopropylacrylamide groups are combined into a cross-linked network of the silk fibroin hydrogel through a photochemical reaction, so that a composite hydrogel precursor solution can be rapidly gelatinized under ultraviolet irradiation and is tightly adhered to damaged tissues, and rapid compression-free hemostasis of wounds is realized.

The invention relates to a potassium ion competitive blocker intermediate and a preparation method thereof. The first aspect of the invention provides a preparation method of a potassium ion competitive blocker compound in a formula 1, and the reaction route is shown as follows: # imgabs0 # R1 is H or F; r < 2 > is F, H,-O (CH2) 3OCH3; r3 and R5 are independently selected from H and OCH3; r4 is C or N; the method comprises the following steps: step 4, obtaining a compound shown in a formula 1 from a compound shown in a formula 2 under the action of a borane-amine complex and titanium tetrachloride. According to the method for preparing the potassium ion competitive blocker, one step of oxidation can be reduced, material loss is reduced, cost is reduced, aftertreatment is simplified, the yield of each step reaches 88% or above, and the purity reaches 99% or above. The process for preparing the potassium ion competitive blocker compound in the formula 1 is simpler and more convenient, and is suitable for industrial production.

The application belongs to the technical field of electrocatalysis, and particularly relates to an electrocatalytic material and a preparation method thereof. Existing catalytic materials are unstable in the process of electrocatalytic hydrogen evolution. The application provides an electrocatalytic material, which is prepared from 2H-MoS2 and alkali metal carbonate through high-temperature calcination. Through a method of facilitating phase transition of 2H-MoS2 by means of molten alkali metal carbonate assisted intercalation, a ternary 1T'-MMoS2 (A=Na, K) material is prepared. The 1T'-MMoS2 is a stable ternary compound, so that the product avoids reverse transition from the 1T' phase to the 2H phase in the process of electrocatalytic hydrogen evolution, thereby exhibiting excellent stability.

The invention relates to the technical field of antibacterial plastics, and discloses a functional zinc oxide modified polypropylene antibacterial plastic, and compared with pure-phase polypropylene plastic, the functional zinc oxide modified polypropylene plastic has better antibacterial performance and mechanical performance, and the antibacterial performance is better. Zinc oxide serving as a non-toxic and harmless antibacterial inorganic matter with an antibacterial effect not only increases the antibacterial property of the polypropylene plastic, but also improves the mechanical property of the polypropylene plastic when being added into the polypropylene plastic, the benzimidazole derivative has good biological activity and antibacterial effect, and the antibacterial property of the polypropylene plastic is improved by grafting the benzimidazole derivative on the surface of zinc oxide. According to the present invention, by adding the benzimidazole derivative and the zinc oxide to the polypropylene plastic, the escape and the loss of the small molecules are avoided, the antibacterial effect of the polypropylene plastic is increased through the synergistic effect between the benzimidazole derivative and the zinc oxide, and the mechanical property of the polypropylene is further improved when the polyethylene is added into the polypropylene in the blending manner.

The application discloses a wastewater treatment process and system based on combination of electro-catalysis and electro-deionization, and the process comprises the following steps: S1, inputting first wastewater into a cathode treatment chamber and inputting second wastewater into an anode treatment chamber; S2, applying voltage to make the cathode treatment chamber and the anode treatment chamber carry out electrodialysis, and at the same time, reduction reaction is synchronously carried out in the cathode treatment chamber and oxidation reaction is synchronously carried out in the anode treatment chamber; S3, making part of effluent water of the cathode treatment chamber enter a cathode concentrated water chamber after passing through a first anion exchange membrane, and then enter a fresh water chamber after passing through a first cation exchange membrane; making part of effluent water of the anode treatment chamber enter an anode concentrated water chamber after passing through a second cation exchange membrane, and then enter the fresh water chamber after passing through a second anion exchange membrane; S4, water in the fresh water chamber is finally discharged as qualified wastewater after passing through anion and cation exchange resin. The application integrates three kinds of processes into one, and can make effluent water quality stable to reach the standard of water reuse.

The invention relates to a lacosamide injection and a preparation method thereof. The injection contains lacosamide, a stabilizer, an antioxidant, a complexing agent and a buffer solution. The injection is characterized in that the stabilizer is sodium gluconate, the antioxidant is sodium pyrosulfite, alpha tocopherol and glutathione, the complexing agent is edetate disodium, and the buffer solution is an acetic acid-sodium acetate buffer solution. Meanwhile, the invention discloses a corresponding preparation method. Compared with the prior art, the preparation method has the advantages that the stability of lacosamide is obviously improved, particularly, the generation of two main impurities, namely an impurity D (N-deacetylated lacosamide hydrochloride) and an impurity F (demethylated lacosamide), can be obviously reduced, the quality of a preparation product is improved, the toxic and side effects are reduced, and the preparation method is simple, low in cost and suitable for industrial production. The method is suitable for industrial large-scale production.

The present application relates to a kind of antibody conjugated drug capillary gel electrophoresis purity analysis method based on TCEP reduction and its application, the purity analysis method includes: sample is added to diluent, then TCEP and SDS sample buffer are added and incubated, and the supernatant is obtained after centrifugation, and the supernatant is analyzed by capillary gel electrophoresis;The connection mode of antibody and drug in the antibody conjugated drug includes sulfur bridge coupling or cysteine coupling.In the present application, TCEP is used to reduce ADC, which can open the interchain disulfide bond without destroying the sulfur bridge, improving the accuracy, reproducibility and solution stability of sulfur bridge coupling ADC sample purity analysis.This method is suitable for the analysis needs in antibody conjugated drug research and development, production quality control and stability research.

The application belongs to the technical field of water treatment agents, and particularly relates to a multifunctional composite water purifying agent and a preparation method thereof, which comprises the following raw materials in parts by weight: multifunctional water purifying powder 90-100 parts, bentonite 8-10 parts, sodium carboxymethyl cellulose 0.5-1.5 parts, sodium percarbonate 0.5-1 part and sodium citrate 0.5-1 part; the multifunctional water purifying powder comprises core layer material and shell layer slurry; the multifunctional water purifying agent of the application takes the multifunctional water purifying powder with a core-shell structure as a core, cooperates with bentonite, sodium carboxymethyl cellulose, sodium percarbonate and sodium citrate, realizes efficient and synchronous removal of heavy metals, organic matters, colority and microorganisms, and has the advantages of wide spectrum, stability and easy recovery.

The invention relates to the technical field of silicon wafer treatment, in particular to a silicon wafer oxidation device and a silicon wafer oxidation method. The silicon wafer oxidation device comprises an oxidation chamber, an inner cavity of the oxidation chamber is communicated with an ozone gas source and a protective gas source, an oxidation loading assembly is arranged in the oxidation chamber, and the oxidation loading assembly is suitable for installing a part to be oxidized; the ultraviolet light assembly is mounted in the oxidation chamber, and the ultraviolet light assembly is suitable for irradiating ultraviolet light towards the oxidation loading assembly; the oxidation temperature control assembly is mounted in the oxidation chamber, and the oxidation loading assembly and the oxidation temperature control assembly are correspondingly arranged; the downstream of the oxidation chamber is provided with a texturing chamber, and the cleaning chamber and the texturing chamber are communicated with the oxidation chamber in a sealed manner. When the silicon wafer oxidation device disclosed by the invention is used for oxidizing the single-side surface of the silicon wafer, the generation of defects in the silicon wafer oxidation process can be reduced, and the generation quality of a silicon dioxide oxidation layer is improved.

The present invention discloses the preparation of a CuCo‑Cu@CoCH composite nanoarray and its application in electrochemical detection of hydrogen peroxide, belonging to the field of electrochemical detection. The present invention utilizes a common hydroxide nanoarray structure and combines it with a co-reduction process to prepare a stamen-shaped CuCo‑Cu@CoCH composite nanoarray, wherein the "stamen" part is basic cobalt carbonate wrapped in Cu, and the "stamen head" part is a CuCo alloy. The presence of CuCo particles in the composite nanoarray greatly improves the conductivity of the composite material and has a strong reducing effect on hydrogen peroxide; the larger specific surface area is conducive to the adsorption of the detection substance; it exhibits excellent performance in hydrogen peroxide detection, with a linear detection range of 1μM to 2000μM and a sensitivity of up to 3290μA mmol L ‑1 cm ‑2 The detection limit was 0.97 μmol L ‑1 .