250 results about "Reduction potential" patented technology

The invention relates to the technical field of soil pollution component analysis, and discloses an agricultural soil pollution prediction method. The method comprises the following steps: carrying out soil physicochemical property detection through layered gridding sampling, determining the heavy metal content, the organic matter content and the enzyme activity, and obtaining a pollution characteristic data set; monitoring diffusion characteristics of pollutants by adopting an electrochemical sensing detection array, and generating a migration rule model; a multi-parameter monitoring system is used for detecting the pH value, the oxidation-reduction potential and the ion activity, and a dynamic change sequence is formed; establishing a colloid interface action response matrix, and constructing a pollutant accumulation model; determining the occurrence form and the ion concentration of the pollutants, and generating an interaction map; and finally, constructing an early warning system, and outputting a prevention and control scheme. According to the invention, through cooperative application of multiple analysis and test means, and in combination with interface action mechanism research of pollutants in soil, whole-process intelligent monitoring of soil pollution prediction is realized.

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 relates to the field of vanadium redox flow batteries, and discloses a vanadium redox flow battery galvanic pile assembly leak hunting method and system, and the method comprises the following steps: obtaining a reference fluid and chemical parameter distribution in a galvanic pile through constructing a multi-level fluid mechanics model and a chemical reaction kinetic model; collecting and monitoring chemical parameters such as pressure, flow, vanadium ion concentration, oxidation-reduction potential and pH value in the galvanic pile in real time; and performing multi-dimensional feature fusion on the acquired data to generate a data matrix, performing abnormal mode recognition on the data matrix by using a deep learning model of a convolutional neural network and a long-short term memory network, and accurately positioning a leakage position. According to the invention, comprehensive monitoring of fluid and chemical parameters in the galvanic pile is realized, detection requirements of tiny leakage can be rapidly responded, high precision and real-time performance are realized, and effective technical support is provided for safe operation of the vanadium redox flow battery.

The invention discloses a circuit board wastewater heavy metal removal method and system, and the method comprises the steps: monitoring the concentration and valence distribution of heavy metal ions in circuit board wastewater in real time, and generating wastewater heavy metal form distribution characteristics in combination with oxidation-reduction potential and pH value; based on wastewater heavy metal form distribution characteristics, adjusting an oxidation-reduction environment to generate heavy metal ion enriched wastewater; the method comprises the following steps: introducing heavy metal ion enriched wastewater into an electric flocculation reactor, applying a periodic electric field through a programmable pulse power supply to dissolve an aluminum or iron anode to release a multi-core hydroxyl complex, and carrying out a co-precipitation reaction with heavy metal ions to generate a flocculating constituent suspension; and introducing the flocculating constituent suspension into a rotational flow clarification and separation device, realizing mud-water separation through centrifugal sedimentation and inclined plate separation, outputting supernate, discharging the supernate after reaching the standard, and recovering precipitated sludge rich in heavy metals. By utilizing the embodiment of the invention, efficient breaking and separation of the complex-state heavy metals can be realized, and good environmental benefits and resource values are achieved.

The embodiment of the invention relates to a method for initiating in-situ polymerization of an electrolyte solution through electrochemical induction. A solvent of the electrolyte solution comprises cyclic ether molecules and halogen atom substituted ethylene carbonate molecules; the method comprises the following steps: carrying out constant-current charging on a battery to a set voltage, and carrying out constant-voltage charging for a specific time under the set voltage, so that halogen atoms of halogen atom substituted ethylene carbonate molecules are removed under the reduction potential of the negative electrode side of the battery to generate free radical sites, two molecular structures after halogen atoms are removed are mutually combined through the free radical sites to form a dimer, the dimer is migrated to the positive electrode side in an electrolyte solution, dehydrogenation reaction is carried out under the action of oxidation potential applied to the positive electrode side, and in-situ ring-opening polymerization reaction of cyclic ether molecules is initiated through removed hydrogen ions; therefore, in-situ polymerization solidification of the electrolyte solution is realized under the condition that a conventional initiator is not contained.

The invention relates to a method for improving solar hydrogen production efficiency of a polar heterojunction material. The method comprises the following steps: firstly, selecting a first polar two-dimensional semiconductor with asymmetric upper and lower layer elements, and coupling and stacking the first polar two-dimensional semiconductor and a second two-dimensional semiconductor through Van der Waals force to form a polar heterojunction; the intrinsic electric field, the vacuum energy level difference and the energy band arrangement of the polar heterojunction are regulated and controlled by turning polarity orientation and applying biaxial strain; under the illumination condition, the intrinsic electric field drives photo-induced electrons and hole space separation, and the vacuum energy level difference enables the oxidation or reduction potential of water to be matched with the energy band boundary, so that the condition of photocatalytic full decomposition of water is met, and the solar hydrogen production efficiency is further improved. Taking a polar heterojunction as an example, the first principle calculation shows that the solar hydrogen production efficiency of the heterojunction is remarkably improved under the regulation and control of an intrinsic electric field and biaxial strain; the method has universality and can be popularized to other two-dimensional polar heterojunction photocatalytic systems.

The invention relates to a method and a system for reversibly regenerating an inactivated carbon dioxide reduction electrode based on electro-catalysis, which comprises the following steps: firstly, controllably removing pollutants on the surface of the electrode by reversely applying an oxidation potential, and then introducing an electroplating solution containing metal ions and applying a dynamic reduction potential; metal nanoparticles are deposited on active sites on the surface of the catalyst in situ, and the active sites are reconstructed and optimized. According to the method, the initial catalytic performance of the electrode can be basically recovered, the catalytic activity can be recovered, the operation process is compatible with the continuous production requirement, and a core guarantee is provided for efficient and continuous industrial application of the electrocatalytic carbon dioxide reduction technology.

The invention discloses an establishing method, a monitoring method and an adding method of a monitoring model for the concentration of hydrochloric acid in an etching solution. The establishing method of the monitoring model for the concentration of hydrochloric acid in the etching solution comprises the following steps: acquiring sample data; calculating each coefficient value in a pre-established multivariate polynomial regression model according to the sample data to obtain a regression model; obtaining verification data, taking the temperature, the oxidation-reduction potential, the hydrochloric acid concentration and the Cu < 2 + > concentration in the verification data as the input of the regression model, and outputting the predicted value of the conductivity; calculating the closeness degree of the predicted value of the conductivity and the actual value of the conductivity in the verification data; when the calculated closeness degree is smaller than a preset threshold value, recalculating each coefficient value in the regression model until the closeness degree is greater than or equal to the preset threshold value; and when the calculated closeness degree is greater than or equal to a preset threshold value, taking the obtained regression model as a hydrochloric acid concentration monitoring model.

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 relates to the technical field of disinfectants, in particular to a production method of a low-corrosion chlorine dioxide disinfectant, which comprises the following steps: dropwise adding a sodium hydroxide solution, monitoring the pH value, adjusting the pH value to 8-10, maintaining stirring for 5 minutes, checking solubility and temperature, collecting precipitate particles, and filtering to remove the precipitate particles to obtain an alkaline mixed solution. According to the invention, the pH value is monitored and regulated to an alkaline interval to execute solubility inspection, so that the property control of the mixed solution is realized; on the basis of combined treatment of nanometer titanium dioxide photocatalysis and radio frequency discharge, the content of free radicals is multiplied, and the oxidation activity is improved; a silane coupling agent is combined to treat nano zirconium oxide and put into a system, the temperature is adjusted, the dispersion state is monitored, and the dispersion stability is guaranteed; the pH value and the oxidation-reduction potential are continuously monitored, foam separation and the chlorine content are controlled, and the quality of an intermediate solution is ensured; regulating and controlling the adding amount and the pH value of hydrochloric acid, monitoring gas escape, and screening out impurities to obtain a high-purity isolate.

The invention discloses an electrochemical microscopic imaging analysis method based on a fluorescence signal, which comprises the following steps of: constructing a fluorescence response electrochemical signal instrument by combining electrochemistry with a fluorescence microscope, and observing the redox potential of K3 [Fe (CN) 6] by taking a terpyridyl ruthenium (Ru (bpy) 32 +) / potassium ferricyanide (K3 [Fe (CN) 6]) fluorescence system as a research object. Influences of electrochemical behaviors on fluorescence signals are deeply explored, and the relationship between fluorescence signal changes and electric signal changes is revealed. According to the present invention, the combination of the electrochemical technology and the fluorescence signal is achieved, the disadvantage of the poor spatial-temporal resolution of the electrochemiluminescence is made up, the new dimension capable of being regulated and controlled by the electrical parameter is provided for the fluorescence imaging, and the Faraday current and the non-Faraday current can be completely reflected by the fluorescence signal. Therefore, the method has wide application value in the aspects of exploring the conductivity of the nano material and the like.

The present invention belongs to the field of vanadium element analysis and testing, and specifically relates to a method for testing vanadium content and vanadium valence. The testing method of the present invention comprises the following steps: adding a buffer solution to an excess oxidant solution to obtain a standby solution; adding a vanadium-containing electrolyte to be tested with a volume of V to the standby solution, standing, and obtaining an intermediate solution containing excess oxidant and pentavalent vanadium ions; using a potentiometric titrator to add a titrant to the intermediate solution until two sudden jump points appear; the first sudden jump point is a sudden jump in the reduction potential of the excess oxidant, and the volume of the titrant consumed corresponding to the reduction of the excess oxidant is V1; the second sudden jump point is a sudden jump in the reduction potential of pentavalent vanadium, and the total volume of the titrant consumed at this time is V2, and the volume of the titrant consumed corresponding to the reduction of pentavalent vanadium ions to tetravalent vanadium ions is V2-V1; the vanadium content and vanadium valence are calculated by formula. The detection method of the present invention is simple, fast and accurate.

The invention provides an earth surface matrix sensor based on a hyperspectral technology and a monitoring method, and the sensor comprises a sensor module which is used for extending into a stratum through a housing; the hyperspectral module extends into the stratum through the shell; the communication module is in communication connection with the sensor module and the hyperspectral module; the terminal module is in communication connection with the communication module and stores a plurality of association relationships between hyperspectral curve characteristics and surface matrix physicochemical property parameters (moisture, salinity, temperature, acidity and alkalinity (pH), oxidation-reduction potential (Eh) and the like), and each association relationship corresponds to a preset region type; the terminal module obtains hyperspectral information measured by the hyperspectral module; the terminal module determines an association relationship corresponding to the stratum according to a region type corresponding to the stratum; and the terminal module completes surface matrix monitoring of the stratum according to the hyperspectral information, the association relationship and the surface matrix physicochemical property parameters.

The invention discloses a method for preparing 5N selenium powder, which specifically comprises the following steps: carrying out oxidation treatment on a crude selenium raw material to be treated to obtain selenium dioxide; dissolving the obtained selenium dioxide at normal temperature to obtain a seleninic acid solution; and carrying out cascade reduction reaction on the obtained seleninic acid solution under the action of an external magnetic field to obtain nano-scale selenium powder, and washing and drying the nano-scale selenium powder to obtain the 5N selenium powder. According to the method, the oxidation-reduction potential is controlled to rise in a stepped manner, and the external magnetic field is used for assistance, so that the oxidation-reduction reaction of selenium is adjusted, forward proceeding of the selenium reduction reaction is promoted, the whole preparation process is short, the selenium purity is high, and the direct yield of selenium is high.

The invention discloses a mechanical and photochemical fluid polishing integrated auxiliary machining platform and a combined polishing method. The platform comprises a rack, a workpiece transfer mechanism used for clamping and moving a workpiece, a mechanical fluid polishing module and a photocatalysis detection feedback module. The mechanical fluid polishing module comprises a dual-purpose polishing groove body, a mechanical polishing assembly and a photocatalytic fluid polishing assembly. The shading area is arranged in the photocatalytic fluid polishing chamber, the oxidation-reduction potentials inside and outside the shading area are detected respectively, the optical excitation ORP value is obtained by solving the difference, the optical excitation ORP value is maintained in an ideal interval by adjusting the ultraviolet light intensity, and the whole photocatalytic fluid polishing process is kept efficient and reliable; due to the fact that the optical excitation ORP eliminates the influence on the oxidability of original substances which contribute slightly to workpiece surface oxidation in the polishing solution, the increment of hydroxyl free radicals generated due to photocatalysis can be accurately measured, and the control accuracy of the photocatalytic fluid polishing process is improved.

The invention relates to a heavy metal removal method for constructing a micro electric field based on cooperation of metal self-corrosion and ion confinement. The heavy metal removal method comprises the following steps that metal with self-corrosion performance serves as an anode, a copper-iron Prussian blue frame material electrode with an ion confinement structure serves as a cathode, heavy metal wastewater serves as electrolyte, and a micro electric field with the energy self-supply characteristic is constructed; and carrying out electrochemical reaction to limit the heavy metal ions in the cathode framework material so as to remove the heavy metal in the wastewater. Compared with the prior art, by constructing the micro electric field with the energy self-supply characteristic and combining the metal iron anode with the negative oxidation-reduction potential and the copper-iron Prussian blue cathode with the ion confinement structure, efficient selective adsorption and stable curing of the heavy metal ions are achieved, and dependence on an external power source or a light source is not needed.

The application discloses an electro-catalytic oxidation system and method and an ecological joint treatment method for in-situ remediation of water body sediments, which utilizes an intelligent pulse power controller to perform intermittent pulse electro-catalytic oxidation on the bottom mud at the water bottom, generates hydroxyl radicals through in-situ catalysis of an anode to degrade organic pollutants of the bottom mud, generates micro-bubbles in the interstices of the bottom mud through the electrolysis of water to improve the oxidation-reduction potential, and further reserves time for the soluble pollutants in the interstitial water of the bottom mud to sufficiently diffuse to the surface of the electrode, so as to avoid energy waste caused by concentration polarization. Through reverse power supply, the polarity of the anode and the cathode is instantaneously reversed, trace amounts of acidic substances and gas generated through in-situ electrolysis are utilized to strip off the calcium and magnesium scale attached to the surface of the cathode, and manual cleaning and maintenance under water are realized. In combination with the planting of submerged plants on the treated bottom mud, ecological joint treatment is realized, the root system of the submerged plants is utilized to perform long-term ecological fixation and water purification on the treated sediments.

The present application provides a kind of biogas slurry chemical oxygen demand online monitoring method and system, the method comprises: obtaining the current characteristic data of biogas slurry, the characteristic data includes multiple in dissolved oxygen, turbidity, oxidation-reduction potential and conductivity;The current characteristic data of the biogas slurry is input into least square regression model, and the current chemical oxygen demand predicted value of the biogas slurry output by the least square regression model is obtained;The least square regression model is obtained by training by taking the characteristic data sample of the biogas slurry as characteristic variable, and taking the measured value of the chemical oxygen demand corresponding to the biogas slurry as target variable.The present application realizes the rapid, low-cost detection of biogas slurry chemical oxygen demand by real-time monitoring of multiple characteristic data, constructing multi-parameter fusion partial least square regression prediction model.

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).

A photoelectric conversion element 100 according to the present disclosure comprises a first electrode 2, a photoelectric conversion layer 4 containing a perovskite compound, and a second electrode 6. The perovskite compound includes Sn. The photoelectric conversion layer 4 further contains a metal element and a halogen element present in a near-surface region that includes a surface facing the second electrode 6. The metal element has a standard oxidation-reduction potential that is more negative than that of Sn4+.

A metal-organic framework according to the present invention provides a metal-organic framework satisfying chemical formula 1. (Chemical formula 1) M+COO--(CH2)n- COO-M+ (M is a metal having a standard reduction potential of -0.8 V to 1.8 V, and n is an integer between 2 and 15.)

The invention discloses a method for preparing a hydrogen peroxide-assisted cathode electrodeposition metal organic framework film, and relates to the field of electrochemical synthesis technology. The main points of its technical solution are: specifically comprising the following steps: S1, preparing a cathode electrodeposition solution, dissolving 5 5000mM (millimoles per liter) of a metal salt, 5 5000mM of an organic ligand molecule, and 0.1 5000mM of hydrogen peroxide in an aprotic solvent to obtain a cathode electrodeposition solution; S2, using a method in which a reduction potential is applied to a conductive substrate, cathode electrodeposition is performed on the obtained cathode electrodeposition solution to obtain a metal organic framework film. The method of the present invention utilizes hydrogen peroxide electrochemistry to induce the dehydrogenation of organic ligand molecules at a relatively low potential, thereby achieving the purpose of generating a high-purity MOF film. The preparation method is simple, efficient, low-cost, and has a replaceable working electrode, and can be applied to the preparation of a variety of MOF films containing different metal nodes.

The embodiment of the invention discloses an electrolyte, a lithium ion battery and electric equipment, the electrolyte comprises a film-forming additive, the film-forming additive comprises amino borane and / or an amino borane metal derivative, the chemical formula of the amino borane metal derivative is M (NH2BH3) n, M is metal, and n is a positive integer equal to the chemical valence state of M. The film-forming additive has high reduction potential and low oxidation potential, electrochemical reaction can be carried out on the surfaces of a positive electrode and a negative electrode to generate a compact SEI film and a compact CEI film, the generated SEI film and the generated CEI film have the characteristics of low impedance and good high-temperature stability, and the high-temperature cycle performance and the power performance of the battery can be improved.

This application discloses a self-cleaning electrolysis module and electrolysis equipment. The self-cleaning electrolysis module includes a shell and an electrolysis space within the shell. The electrolysis space is divided into a first chamber with a first electrode and a second chamber with a second electrode by a first separator. The first and second electrodes have opposite polarities and their polarities can be switched. The first separator is an ion channel for cations. The first chamber is provided with a first inlet pipe and a first outlet pipe, and the second chamber is provided with a second inlet pipe and a second outlet pipe. The first and second inlet pipes are arranged in parallel. When the electrode in any chamber is an anode, the inlet and outlet pipes of the current chamber are connected, and the inlet pipes of adjacent chambers are disconnected. The self-cleaning electrolysis module of this application can output electrolysis products with high redox potentials and can also achieve self-cleaning of scale in the chamber by switching electrode polarities.

A photoelectric conversion element including an anode, a cathode, and a photoelectric conversion layer, wherein the photoelectric conversion layer contains a first organic compound and a second organic compound, and difference between oxidation potential of first organic compound and reduction potential of second organic compound is larger than 1.5 [V], and the first organic compound is any one of general formulae [1] below, a fluoranthene derivative, and a metal complex,R1 represents a hydrogen atom or a substituent, Ar1, Ar2, and Z1 represents a substituent, n1 and n2 represents an integer of 0 to 4, and X1 to X3 represents a nitrogen atom, a sulfur atom, an oxygen atom, or a carbon atom.

The present invention provides an electrochemical energy storage device comprising: a cathode, which generates a first metal ion that substantially participates in an electrochemical reaction during the operation of the device; an electrolyte, which generates at least one second metal ion that substantially participates in the electrochemical reaction, wherein the second metal ion is different from the first metal ion and has a reduction potential / nucleation charge higher than that of the first metal ion; and an anode that includes at least one current collector foil. The present invention proposes combining two or more heterogeneous metal ions with differing reduction potentials / nucleation charges within the same electrochemical system, utilizing the ion with the lowest reduction potential / nucleation charge to define the reaction window, thereby achieving a novel electrochemical energy storage device involving dual or multiple ion participation.

The invention discloses a preparation method and application of an electrode of bioelectrochemical equipment. The method comprises the following steps: S1, pretreatment; s2, preparing a polyvinyl alcohol solution; s3, preparing electrode slurry; s4, coating is carried out; and S5, drying. The electrode is used for treating chlorophenol wastewater. The electrode provided by the invention is prepared by modifying zero-valent iron, is arranged in an anode region of a bioelectrochemical reactor, and can effectively regulate and control oxidation-reduction potential, strengthen electron transfer between iron reducing bacteria and acetogenic bacteria at an anode and enrich acetogenic flora by loading trace zero-valent iron, so that the yield of acetic acid in an acidogenic phase is increased; the synchronous pollutant removal and methane yield increase are realized, and the economic benefit is improved.

The application provides an organic negative electrode and a metal-air battery, the organic negative electrode comprises an organic matter with a low redox potential, the organic matter with the low redox potential comprises phenazine, diquinoxaline phenazine, a nitrogen heterocyclic ring, a carboxylate or an azo compound, the organic matter in the organic negative electrode is corrosion resistant and the redox potential can be adjusted, even reaching a negative reduction potential comparable to that of hydrogen, so that the phenomenon of hydrogen evolution corrosion cannot occur; a large number of functional groups and active sites in the organic matter can induce uniform deposition of metal ions, and there is no condition for dendrite growth and formation of a passivation layer, so that various problems caused by the above metal negative electrode can be completely avoided; the metal-air battery with the above organic negative electrode has the advantages of long cycle time, stable performance, safety, environmental protection and low cost, and has a wide application prospect in the field of large-scale energy storage.