196 results about "Oxidation reduction" patented technology

The invention provides a carbon emission management monitoring method and device for rice planting in a cold region, and relates to the technical field of carbon emission management monitoring. Vertical three-layer parameters of a soil profile, namely the surface methane concentration, the middle oxidation-reduction potential and the deep organic acid concentration, are collected; the method comprises the following steps: mapping a middle-layer potential into an inhibition coefficient according to a microbial electrochemical principle, further calculating potential uplink electron flux and actual downlink electron sedimentation intensity, identifying an electron transport chain breakage risk through a residual error of the potential uplink electron flux and the actual downlink electron sedimentation intensity, and carrying out nonlinear fusion on the electron transport residual error and environment weights of all layers by adopting a p-norm model. Through the risk amplification coefficient, the superlinear conduction of the local risk to the whole system is realized, the dominant risk layer is accurately positioned based on the comprehensive weight, the differential field management strategy is automatically generated, and finally the closed-loop intelligent management normal form is constructed, and the accurate control of the carbon emission based on the mechanism model is realized.

The invention provides a digital production supervision method and system, belongs to the field of computers, and aims to solve the problems of high rework rate and low efficiency caused by the fact that optical inspection or chemical analysis often depends on cleaned quartz pieces due to incomplete cleaning of cracks and residual metal and the like and the optimal correction opportunity is missed once the problems are found. The method comprises the steps that in the stage of cleaning a hot-worked quartz workpiece, a cleaning formula is automatically matched based on information of the quartz workpiece, and the cleaning formula comprises a cleaning solution ratio and a cleaning time-temperature control curve; state change parameters of cleaning liquid in the cleaning tank are obtained in real time, wherein the state parameters of the cleaning liquid comprise conductivity and oxidation-reduction potential; and evaluating the quality defect of the quartz workpiece based on the state change parameter of the cleaning fluid.

The invention discloses a method for preparing a sodium electric precursor by a redox control potential method. According to the invention, the oxidation-reduction electrode is arranged on the reaction kettle to monitor the oxidation-reduction potential of the reaction system in real time, and different potential control is realized by controlling the purity of nitrogen and other mixed gases in the reaction kettle or the dosage of an oxidation-reduction agent added into the reaction kettle; the primary and secondary particle morphology, the specific surface area and the product compaction of the product can be effectively controlled, and precursors with different physical and chemical indexes can be prepared according to different potentials. According to different characteristics of the precursor, the sintered positive electrode material has different electrochemical properties, such as higher electrochemical rate capability, gram volume and cycle performance, so as to meet application requirements of different products.

The invention provides a chromium-titanium bimetallic layered sulfide positive electrode material and a preparation method and application thereof, and belongs to the technical field of lithium ion battery materials. The chemical general formula of the material is LiCrxTiyS2, x + y = 1, the material belongs to a hexagonal crystal system O1 type structure, and the space group is Pm1. Microtopography analysis shows that the material is granular, the particle size distribution is 2-15 [mu] m, the particle surface has a layered structure characteristic, and each element is uniformly distributed on the particle surface and in a bulk phase. The capacity of the material mainly comes from oxidation reduction between titanium and sulfur, and chromium has the effect of stabilizing a structural framework and does not participate in the charge compensation process. Electrochemical analysis shows that the reversible capacity of the LiCr2 / 3Ti1 / 3S2 positive electrode material reaches up to 223 mAh g <-1 > and is close to the theoretical value of the positive electrode material of the system. In addition, the material shows excellent rate capability and cycling stability, and still keeps the capacity retention ratio of 80% after 330 times of cycling.

The application discloses an automatic control method for oxidation flocculation parameters in mancozeb wastewater treatment, and belongs to the technical field of industrial wastewater treatment and automatic control. In view of the problem that the existing process relies on manual experience and the oxidation and flocculation stages are improperly connected, the multifunctional modified material containing dithiocarbamate salt groups, quinone groups and pre-complexed manganese and zinc ions is prepared first; the material and hydrogen peroxide are synchronously added in the acid oxidation stage, and the control system monitors the redox potential change rate in real time; when the redox potential reaches the preset threshold value and the characteristic change point with the first derivative of zero or the change from positive to negative appears and is maintained for the preset maintenance time, the system is automatically adjusted to be alkaline, the modified material triggers the net capture and chelation crosslinking reaction, and finally solid-liquid separation is carried out; the polymer skeleton is protected from indiscriminate attack of free radicals, the problem of drug antagonism is overcome, and the stable and up-to-standard effluent quality is realized.

The application relates to a catalyst for catalytically synthesizing propylene acid from propane and application thereof, and the catalyst is represented by the following general formula: Mo a V b Te c Nb d Ni e O x Wherein, a, b, c, d and e respectively represent the atom numbers of Mo, V, Te, Nb and Ni, and the molar ratio of a:b:c:d:e is 7.0-9.0:1.7-2.5:1.0-1.5:1.7-2.3:0.1-1.0, and the value of x is determined by the oxidation state of each element; Ni is introduced by nickel molybdate, Mo is introduced by a molybdate and the nickel molybdate, and the nickel molybdate is prepared by co-precipitation of a molybdate and a nickel salt in the presence of an organic acid. According to the application, the content of different valence metals on the surface of the catalyst can be adjusted by introducing nickel into the catalyst through nickel molybdate, so that the content of high-valence elements Mo 6+ , V 5+ and Ni 2+ in the catalyst and the oxygen vacancy are increased, and the redox capacity of the catalyst is enhanced.

The application provides a reduced graphene oxide powder, which is obtained through carbonization after twice oxidation-reduction processes. After one-time low-degree oxidation-reduction and secondary high-degree oxidation, large-diameter graphene is inserted deeper in the oxidation process, and the oxidation is more sufficient, so that the reduced graphene oxide with low powder resistivity and high specific surface area is obtained.

The present invention provides a kind of dilute solution manufacturing device, trace addition to the first liquid such as ultrapure water, the second liquid containing conductivity imparting substance or oxidation-reduction potential adjustment substance, can stably manufacture the dilute solution of specified concentration. Dilute solution manufacturing device by adding the second liquid containing at least one of conductivity imparting substance and oxidation-reduction potential adjustment substance to the first liquid to manufacture the dilute solution of the second liquid, wherein, with: first pipe (1), flow through the first liquid;Pump (6), via second pipe (5) to the first pipe (1) inside the second liquid is added;Degassing pipe (8), from the pump (6) degassing;Water quality sensor (11), by conductivity meter, resistivity meter or oxidation-reduction potential meter is constituted;And control device (12), when the water quality detection value of the water quality sensor (11) is above the specified value, open degassing valve (9).

The invention discloses a high-uniformity PCB pattern electroplating method based on pulse electroplating, and aims to solve the problem of insufficient copper thickness uniformity caused by residual copper rate difference, unreasonable process edge design, poor accompanying plating plate adaptability and direct current electroplating defects in traditional pattern electroplating. A plating block is arranged on the process edge of a PCB to share current, a special accompanying plating plate matched with the residual copper rate is configured to optimize an electric field, an electroplating solution containing Fe < 2 + > / Fe < 3 + > redox electron pairs and an insoluble titanium mesh anode are adopted, the two-step pulse electroplating process is combined, and the additive ratio and electroplating environment parameters are regulated and controlled, so that uniform deposition of a copper layer is achieved. The method effectively solves the problems that the local copper layer is too thick / too thin, and filling defects exist in the hole, and improves the reliability and signal transmission performance of the PCB coating.

This invention relates to a rare earth denitrification catalyst, its preparation method, and its application. The rare earth denitrification catalyst comprises rare earth element single atoms and a titanium dioxide-based composite oxide doped with rare earth single atoms. The rare earth element single atoms in this invention exhibit a high adsorption priority for sulfur dioxide, allowing the position and quantity of sulfate to be controlled by the rare earth element single atoms. Furthermore, the hydroxyl groups in the sulfate can enhance the acidity of the catalyst, thereby further improving its redox capacity. The titanium dioxide-based composite oxide can effectively inhibit sulfur dioxide poisoning and further improve the catalyst's denitrification ability in the presence of sulfur dioxide. The rare earth denitrification catalyst of this invention maintains high catalytic activity even in the presence of sulfur dioxide, exhibiting excellent denitrification and sulfur resistance performance.

This invention discloses a method for assessing the oxidation state of specialty berry wines based on dissolved oxygen and oxidation-reduction potential (ORP). Using berry wines aged for 8 months with dissolved oxygen levels less than 0.2 mg / L and ORP less than -50 mV as a benchmark, wine samples with different initial dissolved oxygen gradients were prepared and accelerated to 4 weeks at 40°C. Dissolved oxygen, ORP, anthocyanin retention rate, total phenolic retention rate, ΔE, and sensory scores were simultaneously measured. A dissolved oxygen-ORP linear regression model was established, and piecewise linear regression was used to identify two key inflection points. Based on this, the oxidation state was classified into five levels: safe reducing state, transitional state, slightly oxidized state, moderately oxidized state, and heavily oxidized state. Quality index ranges and production recommendations for each level were provided. After 12 months of bottle storage validation, the model's prediction accuracy reached 92.5%. This invention can rapidly assess the oxidation state of specialty berry wines and guide precise oxygen control.

The present application relates to the technical field of pollution detection, in particular to a water body heavy metal chromium pollution detection method and system, the method comprising the following steps: obtaining the concentration of water body dissolved organic matter, hydrogen ion concentration, oxidation-reduction potential, temperature and initial hexavalent chromium concentration and normalizing, determining the reduction reaction rate constant according to the temperature and oxidation-reduction potential, predicting the reduction rate of hexavalent chromium, the theoretical reduction amount and the theoretical residual concentration, collecting the online electrochemical concentration and the unmanned aerial vehicle hyperspectral inversion concentration and performing difference verification, respectively correcting the electrochemical concentration and the hyperspectral concentration when there is data contradiction, and fusing the two types of correction results to judge the pollution state. In the present application, by establishing a hexavalent chromium natural evolution reference and combining multi-source observation consistency verification, the electrochemical underestimation caused by organic matter passivation and the hyperspectral overestimation caused by spectral background are identified, compensation correction and background stripping are completed, and the accuracy and reliability of chromium pollution detection in complex water bodies are improved.

This disclosure discloses a method for predicting the environmental transformation performance of pollutants, comprising: obtaining a first target reactivity parameter of a target pollutant and a second target reactivity parameter of a target environmental medium, wherein the first target reactivity parameter includes at least one of the following: a first ionization potential, a first affinity potential, molecular hardness, and molecular softness; the second target reactivity parameter includes: redox potential; inputting the first target reactivity parameter and the second target reactivity parameter into a pre-trained activation energy prediction model, and outputting a target reaction activation energy, wherein the target reaction activation energy characterizes the reaction activation energy of the transformation of the target pollutant on the surface of the target environmental medium; and predicting the transformation performance of the target pollutant on the target environmental medium based on the target reaction activation energy.

Methods and systems are disclosed to assess clogging associated with a first well. The first well has a well screen or an open borehole in bedrock. A water sample is received from the first well during an ON state. Water is pumped from the first well during the ON state. A first oxidation reduction potential measurement and a first pH measurement are made on the water sample. First clogging specific information is determined for a first mineral or metal utilizing the first oxidation reduction potential measurement, the first pH measurement, and an Eh vs pH phase diagram for the first mineral or metal.

The invention discloses a bio-responsive high polymer material and application thereof, and belongs to the technical field of biomedical materials. The bio-responsive high-molecular material provided by the invention contains polymers shown as formulas i to viii. Wherein the polymers of the formulas i to viii have excellent fluorescence performance, aggregation-induced fluorescence enhancement performance, multicolor luminescence performance and biological response capability based on a redox reversible switch, and can be applied to sensing, counterfeiting prevention, metal ion detection, multicolor imaging of in-vivo and in-vitro cells and / or tissues and quantitative detection of in-vivo and in-vitro oxidized and / or reducing substances; active oxygen in in-vivo and in-vitro tissues and cells can be removed to achieve long-acting anti-inflammatory and anti-oxidation effects, and the compound can be used for treatment of oxidative stress related diseases and visual monitoring of the treatment process; the biological activity of enhancing tissue retention, stimulating collagen generation, repairing tissue and resisting oxidation and aging of the tissue is achieved, and the effect of filling and repairing in-vivo cells and tissue can be effectively improved; the compound also has the capability of being chelated with metal ions to form a high-molecular metal complex, and can be used for resisting tumors, resisting bacteria, filling and repairing tissues, promoting collagen generation and the like.

Described herein are systems and techniques for monitoring and controlling values of oxidation reduction potential (ORP) of brine provided to a separation system. Brine that includes valuable elements, such as lithium, may also include levels of silica and transition metals like iron that could react with oxygen to create insoluble compounds that could clog apparatus designed to remove lithium from brines. Systems and techniques of the present disclosure may control ORP values by adding measures of reducing agents to brine to prevent formation of the insoluble compounds, such as ferrosilicate that can be formed from an oxidation reaction of ferrous iron (Fe+2) and silicate. Techniques of the present disclosure may generate, train, and use computer models to control ORP values of brine.

The invention belongs to the technical field of piezoelectric ceramic materials, and discloses a hard piezoelectric ceramic preparation method based on oxidation-reduction treatment, which comprises the following steps: sintering a piezoelectric ceramic green body with the component of Ba (1-x) EuxTi (1-x / 8O3) in a reducing atmosphere to obtain BT piezoelectric ceramic (x = 0.015-0.04); and carrying out oxidation treatment on the BT piezoelectric ceramic in an air atmosphere at 1200-1350 DEG C to obtain the hard piezoelectric ceramic. According to the invention, an additional driving force is provided through an oxidation-reduction reaction, so that a solute is separated out in a precipitation phase in a solid solution with relatively low content, the limitation of component regulation and control is solved, and a relatively good piezoelectric coefficient is achieved while the electromechanical coupling performance is optimized.

A method of disposing an adhesive composition onto a first surface of a first substrate comprises: a) disposing a photoactivatable adhesive precursor composition onto at least a portion of the first surface of the first substrate according to a predetermined pattern, and b) exposing the photoactivatable adhesive precursor composition to actinic electromagnetic radiation, thereby providing an adhesive precursor composition that spontaneously cures to provide the adhesive composition. The photoactivatable adhesive precursor composition comprises: at least one free-radically polymerizable compound and a photoactivatable redox initiation system comprising: (i) at least one photoactivatable reducing agent precursor; (ii) at least one transition metal compound comprising at least one metal selected from groups 5 to 11 in the Periodic Table of the Elements; (iii) optional organic peroxide; and (iv) optional quaternary ammonium halide. An article preparable according to the method is also disclosed.

The invention provides a sulfur autotrophic denitrification sulfur source stable supply method based on a sulfur source effectiveness evaluation model, which comprises the following steps of: calculating electrons required by nitrate and nitrite in inlet water by establishing an electron dosage standard taking electron equivalent as a core, and obtaining a theoretical sulfur electron number from sulfide, sulfur-containing salts, amines and iron in absorption liquid; constructing a correction model taking an absorption liquid index, a redox value, dissolved oxygen and a replacement interval as inputs and a single adjustment coefficient as an output, and obtaining a corrected sulfur electron number; the method comprises the following steps: under a first-calculation and second-adjustment combined band limitation scheme of setting an allowable operation range of the sulfur / nitrate electron ratio, calculating a sulfur adding flow according to a required electron number, setting a sulfur adding upper limit by combining sulfate growth and a redox value, and performing small-amplitude post-adjustment and coefficient updating according to residues of nitrate and nitrite in effluent. Nitrate leakage is avoided, excessive sulfate is inhibited, the corrosion risk is reduced, and stable supply is achieved.

This invention relates to a perovskite precursor solution remediation additive, regeneration method, and application. The remediation additive is a tetra(hydroxymethyl)phosphonium salt with the general chemical formula [P(CH2OH)4]. + ·X ‑ X represents a halogen; tetra(hydroxymethyl)phosphonium salt simultaneously acts as an organic cation source, a redox buffer for iodine species, and a coordination stabilizer for lead ions in the perovskite precursor solution. This invention demonstrates significant performance recovery: it can chemically repair aged solutions, enabling the film quality and device performance of the regenerated solution to reach over 95% of the level of a freshly prepared solution.

Europium doped tin perovskites useful in the fabrication of optoelectronic devices exhibiting improved stability and high-power conversion efficiencies and perovskite precursor solutions used to prepare the europium doped tin perovskite, wherein the europium doped tin perovskite can be represented by Formula 1:(A+)(Sn2+)(X−)3·m[(Eu2+)(Y−)2]  1wherein m is 0.001-0.05;X− for each instance is independently F−, Cl−, Br−, or I−;Y− for each instance is independently F−, Cl−, Br−, or I−; andA+ is Cs+, Rb+, CH3NH3+, CH3CH2NH3+, H(C═NH2)NH2+, Me(C═NH2)NH2+, or a mixture thereof.

The invention relates to the technical field of photocatalysis, in particular to a Yb < 3 + > / Er < 3 + > co-doped full-spectrum response Ti-MOF / BiOBr S type heterojunction as well as a preparation method and application thereof. The invention provides an S-type heterojunction composite catalyst, which is mainly prepared from squaric acid, a titanium source, Yb < 3 + > and Er < 3 + > doped BiOBr nanosheets, and the mass ratio of the BiOBr nanosheets in the catalyst is 60%-95%. The high specific surface area of the IEF-11 is beneficial to pollutant enrichment, and the addition of the nanosheet can expand the photoresponse range and can be used as an electron trapping agent, so that the sunlight utilization rate and the photocatalytic performance are improved; the constructed S-type heterojunction can promote separation of photon-generated carriers, and meanwhile, the strong oxidation-reduction capacity of a composite system is reserved. The catalyst has the capabilities of full-spectrum response, efficient degradation of organic pollutants and inactivation of microorganisms, and has a wide application prospect.

The invention discloses a copper refining and recycling system and method. The method comprises the steps of extraction, reverse extraction, electrolysis and etching liquid regeneration. During electrolysis, the copper ion concentration and the oxidation-reduction potential are monitored in real time, the current reference is set according to the concentration, the potential is dynamically and finely adjusted, the potential is maintained to be-0.2 V to + 0.1 V, and generation of cuprous is inhibited; the copper absorption amount of the extraction agent is monitored regularly; the regeneration liquid pre-controls chloride ions and pH. The system integrates on-line monitoring and automatic regulation and control of a central controller. The cathode copper purity, the system stability and the regenerated liquid quality can be improved.

This invention discloses a highly efficient and low-cost method for preparing g-C3N4-supported Fe and Mn bimetallic catalysts, belonging to the field of catalyst technology. This invention uses manganese ferrite as the bimetallic source, combined with a one-step calcination method using melamine, to simultaneously achieve the synthesis of g-C3N4 and the loading of Fe and Mn. During calcination, manganese ferrite decomposes into FeO. x and MnO x Nanoparticles form strong coordination bonds with the nitrogen sites of g-C3N4, enabling atomic-level dispersion of metals and inhibiting metal ion migration. Through the bimetallic synergistic effect of Fe and Mn, the redox capacity of the catalyst can be significantly improved. Manganese ferrite, through its unique thermal decomposition characteristics, bimetallic synergistic effect, and strong chemical bond with g-C3N4, achieves efficient exposure of active sites, significant improvement of redox capacity, and effective inhibition of metal dissolution. It also has the advantages of high efficiency, low cost, and low risk of secondary pollution.

The invention provides various methods of managing a recreational body of water. In some embodiments, the invention provides methods for assessing whether a recreational body of water that previously contained 5,5-dimethylhydantoin (DMH) still contains DMH. Furthermore, some embodiments provide a method of testing a recreational body of water that includes DMH by taking a series of oxidation-reduction potential (ORP) measurements for the water while it has a free chlorine level in a range of about 0.5 to 1.0 ppm, and in response to those measurements, determining whether the DMH present in the water is undergoing decomposition.

The invention relates to the technical field of analytical chemistry detection, and discloses a method and a system for detecting thioctic acid in urine of people based on chromatography-mass spectrometry. The method comprises the following steps: adding a redox buffer system and a metal chelating system into a urine sample, and stabilizing the redox state of lipoic acid under a low-temperature condition; adding a stable isotope internal standard substance into the pretreated sample, and separating and enriching different oxidation-reduction-state compounds based on solvent polarity difference by adopting a liquid-liquid extraction technology; carrying out gradient elution separation by adopting ammonia water system liquid chromatography; simultaneously detecting oxidized lipoic acid and reduced lipoic acid in a tandem mass spectrum multi-reaction monitoring mode; and calculating an oxidation-reduction state concentration ratio by adopting a matrix effect correction algorithm to obtain a metabolic state evaluation index. The technical problem that the detection result is unstable due to the fact that the lipoic acid is in oxidation-reduction state dynamic balance in urine is solved, and the accuracy and comparability of lipoic acid metabolism state evaluation are improved.

This invention belongs to the field of water environment treatment and restoration technology, specifically involving a method for simultaneous restoration of water bodies and sediments using a microbial electrochemical restoration device. The restoration method provided in this invention differs from traditional methods that enhance the transport of electron acceptors such as oxygen or nitrates into the sediment. Instead, it can sequentially form two reaction zones, aerobic and anaerobic, in the longitudinal section of a device. In the anaerobic zone (sediment), electrons from pollutants are directionally pumped out to the water body driven by the redox potential difference between the sediment and water phases. Therefore, pollutants in the sediment and water body can undergo oxidative degradation and reductive degradation, respectively, thereby achieving simultaneous restoration of water bodies and sediments.

The invention discloses a novel nanogold sensing method for continuously detecting various heavy metals by fluorescence'on-off-on 'based on a gradual detection strategy. Gold nanoclusters (GSH-AuNCs) taking glutathione (GSH) as a reducing agent and a stabilizing agent respond to various heavy metals to cause fluorescence quenching, and a novel GSH-AuNCs visual sensing platform is designed according to the remarkable difference of fluorescence intensity before and after coordination / redox competition, so that four heavy metal ions of Fe (III), Cu (II), Hg (II) and Cr (VI) are successfully and rapidly detected step by step. The method is simple in operation steps, high in detection speed (Fe (III): 3 min, Cu (II): 30 s, Hg (II): 3 min and Cr (VI): 3 min), wide in quantitative range (0.1-200 [mu] M), high in sensitivity (LDDFe (III): 87 nM, LODCu (II): 36 nM, LODHg (II): 32 nM and LODCr (VI): 75 nM) and high in anti-interference capability, and is successfully applied to gradual detection of four heavy metals in actual water and biological fluid (urine and serum).

The application discloses a kind of partition oxidation reduction regulation and control biological retention system and method, belong to water treatment technical field.The application is directly connected with atmosphere by being equipped with special reoxygenation passage, and it is connected with different depth area in submerging area direction, oxygen is diffused to specified depth using atmospheric pressure natural drive, to actively build controllable oxidation reduction gradient in submerging area anaerobic substrate.The application realizes partition accurate control: in deep layer, maintain the anaerobic environment of enhanced denitrification, while forming weak oxidation micro area in middle shallow layer to inhibit the reducibility of functional filler such as manganese oxide and other function fillers, significantly reduce effluent manganese ion concentration and promote manganese element in situ regeneration, simultaneously improve the removal efficiency of nitrogen and phosphorus pollutants;Its structure design improves space utilization by optimizing oxidation reduction distribution, can reduce about 25% submerging area volume and filler consumption, reduce construction cost, while maintaining the chemical stability of filler and microbial activity to ensure long-term operation.

The application provides a NaBiO3@Bi2O3 / g-C3N4 heterojunction photocatalyst and a preparation method and application thereof, the NaBiO3@Bi2O3 / g-C3N4 heterojunction contains oxygen vacancy and nitrogen vacancy defects, and shows 3D / 2D micro-morphology; Bi2O3 is wrapped on the surface of NaBiO3 to form a core-shell structure; the prepared heterojunction can absorb visible light in the range of 420-800 nm, and shows a double S-shaped charge transfer mechanism, photo-induced electron-hole pairs have high separation efficiency and strong oxidation-reduction capacity, and the heterojunction has good structural stability.