183 results about "Reduction potential" 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 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 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 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.)

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.

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.

The invention belongs to the field of metal ion battery positive electrode materials, and discloses a tetrahydroquinoxaline-based organic positive electrode material and a preparation method and application thereof. The tetrahydroquinoxaline-based organic positive electrode material is a tetrahydroquinoxaline copolymer, the general formula of the unit structure of the tetrahydroquinoxaline-based organic positive electrode material is shown in the specification, and R1 and R2 are respectively and independently a hydrogen group, a substituted or unsubstituted carbazolyl group, a substituted or unsubstituted triphenylamine group, a substituted or unsubstituted fluorenone group, a substituted or unsubstituted phenanthrenequinone group and a substituted or unsubstituted pyrene-4, 5, 9, 10-tetraketone group. The preparation method comprises the following steps: adding 1, 2, 3, 4-tetrahydroquinoxaline, a brominated raw material, a catalyst, a ligand and sodium tert-butoxide into a solvent, and carrying out Buchwald-Harwig coupling reaction to obtain the 2, 3, 4-tetrahydroquinoxaline. The N element containing lone pair electrons in the tetrahydroquinoxaline copolymer is used as an electrochemical center, and the electric energy is stored through the intercalation and deintercalation of anions, so that the p-type and bipolar polymer positive electrode material has high oxidation-reduction potential and also has excellent cycling stability and rate capability.

The invention belongs to the technical field of electrochromism, and provides an electrolyte for realizing reversible zinc metal deposition and an electrochromism smart window containing the same, the electrolyte comprises a solvent, a zinc salt, an adsorptive polymer and at least one salt of a high reduction potential metal ion; and the reduction potential of the high-reduction-potential metal ions is greater than that of zinc. The thickness of a diffusion layer is effectively reduced by adding the adsorptive polymer, nucleation overpotential is effectively reduced by adding the salt of the high-reduction-potential metal ions, deposition of a compact zinc layer is achieved through cooperation of the adsorptive polymer and the salt, hydrogen evolution reaction and zinc self-corrosion can be inhibited, and therefore the cycling stability is improved, and application in the electrochromic intelligent window is supported.

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.

In the present application, provided is a method for producing copper particles having an average particle diameter in the range of 1-1000 nm, the method comprising a step for precipitating copper particles by mixing at least a first fluid and a second fluid, one of the first fluid and the second fluid being a copper starting material solution containing a starting material for copper particles, the other of the first fluid and the second fluid is a reducing agent solution containing at least one type of reducing agent, the copper raw material solution contains at least monovalent copper ions and / or divalent copper ions, and the oxidation-reduction potential of the copper raw material solution is set so as to achieve the average particle diameter. According to the production method of the present invention, copper particles having a controlled average particle diameter can be easily and stably supplied by a method suitable for mass production without requiring a complicated chemical reaction or heat treatment.

The present application relates to the field of non-ferrous smelting solid waste resource utilization and pollution control technology, and specifically discloses a zinc oxide fume treatment control system and method. The system comprises a raw material slurry module, a first-stage leaching alkali control module, a second-stage leaching temperature control module and a calcification arsenic precipitation control module. In the first-stage leaching process, the efficient arsenic leaching balance point is dynamically captured according to the arsenic and zinc leaching rate variation curve with pH, and the leaching agent addition amount is accurately controlled; in the second-stage leaching, the heating temperature is real-time regulated according to the dissolved zinc rate; before the calcification arsenic precipitation, oxidation treatment is carried out, the oxidation-reduction potential is controlled based on the trivalent arsenic oxidation efficiency, and the lime milk addition amount is dynamically adjusted according to the arsenic concentration and zinc content in the precipitate during the arsenic precipitation process. The present application realizes efficient selective leaching and stable solidification of arsenic, effectively inhibits the loss of zinc, and has the advantages of high separation efficiency, high resource recovery rate and the like.

The present disclosure provides methods for determining concentration of various trace metal ions in aqueous solutions, such as gold plating solutions. At a particular fixed reduction potential, the cathodic current can suddenly increase in magnitude after a certain period of time (e.g., an incubation time) passes in the presence of a trace metal ion (e.g., Tl(I)), where the incubation time is inversely proportional to the concentration of trace metal in the electrolyte. The concentration of the trace metal can be calculated after measuring the incubation time and comparing it against a calibration curve.

The application discloses a preparation method of an iron-based complex positive electrode material and application thereof. Specifically, the iron-based positive electrode electrolyte is a positive electrode active material based on an iron metal organic complex, and a complex structure of the iron metal organic complex is formed by pyridine nitrogen coordination of ferrous ions and tris(2-pyridylmethyl)amine. The complex has good solubility (0.62 M) in a neutral aqueous solution, and an oxidation-reduction potential is 0.55 V vs. SHE, and can be used as a positive electrode electrolyte for a neutral water-based flow battery. The iron-based positive electrode electrolyte used in the application has cheap and easily available raw materials and a simple preparation method, provides a solution for constructing an efficient water-based flow battery, and is favorable for promoting large-scale application of the water-based flow battery.

According to the microbial pollution treatment system and method based on the medium-pressure ultraviolet and the hydrogen peroxide, an intelligent cooperative control strategy with the water inlet flow and the ultraviolet light transmittance as feedforward and the oxidation-reduction potential in front of a membrane as core feedback is constructed, the power of a medium-pressure ultraviolet lamp and the adding amount of the hydrogen peroxide are dynamically adjusted in a linkage mode, and the pollution treatment effect of the medium-pressure ultraviolet and the hydrogen peroxide is improved. The maximization of the advanced oxidation synergistic effect and the precise management and control of the membrane safety risk are realized, so that the technical effects of efficiently inhibiting microbial pollution, absolutely guaranteeing the safety of the reverse osmosis membrane, remarkably reducing the operation energy consumption and the medicine consumption and improving the water quality fluctuation resistance of the system are achieved.

Provided is an apparatus for producing adjusted water in which the concentration of a dopant element is adjusted, the adjusted water being used to apply to a semiconductor substrate having a metal component exposed on its surface in a semiconductor or semiconductor device manufacturing process, and in which dissolution of the metal component into the adjusted water is suppressed during the application. [Solution] An apparatus for producing adjusted water, comprising: a dopant element concentration adjustment device that adds a concentration adjustment agent containing a dopant component to the water to be treated by controlling the amount added; a pH adjustment device that adjusts the pH of the water to be treated to which the concentration adjustment agent may be added; and an oxidation-reduction potential adjustment device that adjusts the oxidation-reduction potential of the water to be treated to which the concentration adjustment agent may be added.

The invention discloses a wet desulphurization oxidation fan whole-process cooperative control method under deep peak regulation. The method comprises the following steps: firstly, acquiring and processing oxidation-reduction potential and fan operation parameters; calculating theoretical oxygen demand flow by using a self-adaptive algorithm; determining a final flow set value and adjusting fan output through arbitration in combination with anti-backflow minimum safe flow back calculation and pulse purging logic; and meanwhile, a gas holdup mapping model is established, false liquid levels caused by gas phase retention are calculated and eliminated, and real liquid levels are obtained to accurately control gypsum discharge. Through multivariable cooperation and decoupling control, the problems of chemical reaction lag, spray gun backflow blockage, liquid level measurement distortion and the like under the deep peak regulation working condition are effectively solved, and the chemical stability and mechanical reliability of the system are remarkably improved.

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 present application provides a kind of total nitrogen concentration on-line monitoring method and system in biogas slurry, 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 total nitrogen concentration prediction 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 total nitrogen concentration measured value corresponding to the biogas slurry as target variable.The present application realizes the rapid, low-cost detection of total nitrogen concentration of biogas slurry by real-time monitoring of multiple characteristic data, constructing multi-parameter fusion partial least square regression prediction model.

A method of recycling a homogeneous platinum-group metal catalyst is disclosed. The method comprises disposing an oxidized anode in an electrically non-conductive media comprising the homogenous platinum-group metal catalyst to adsorb the homogenous platinum-group metal catalyst to a surface of the oxidized anode to form a coated anode in a first mixture. The coated anode is disposed in an electrically conductive media, a reduction potential is applied to the anode to release the homogenous catalyst into the electrically conductive media to form a second mixture. The second mixture and a precipitation agent are combined to precipitate out an electrolyte from the second mixture to yield a third mixture including a recycled solution including the homogenous platinum-group metal and precipitated electrolyte. A recycled solution including a recycled homogenous platinum-group metal catalyst is also disclosed.