100 results about "Reduction potential" patented technology

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 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+.

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 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 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.

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.

The application discloses a two-end vertical structure organic electrochemical biomimetic synapse device and a preparation method and a biomimetic neural morphological chip thereof. The device comprises a bottom electrode, a first organic mixed ion-electron conductor layer, a first ion gel layer and a top electrode which are sequentially stacked. The first ion gel layer is configured to provide anions. The first organic mixed ion-electron conductor layer is configured to transport anions and electrons. The top electrode is configured to apply a bias voltage to drive the migration of anions. In terms of structure, the four-layer stacked structure realizes ion path innovation, and the vertical channel sharply reduces the delay time to the microsecond level. In terms of device mechanism, the low reduction potential of the organic ion-electron mixed conductor and the depletion of the de-doped carriers are utilized, the current spontaneously reverses under the action of a certain voltage, and the simulation of artificial synapse sensitization and habituation is realized at the single device level.

This invention relates to the field of metal material recycling technology and discloses a recycling process for valuable metals from waste lithium batteries. The process includes: grinding and activating waste lithium battery cathode powder, endogenous residual carbon, and pyrite particles to induce lattice distortion and construct a micro-couple network in the cathode powder; stabilizing and adjusting the resulting activated powder in deionized water to constrain the release rate of the redox potential at the solid-liquid interface using a low-ion concentration environment; and adjusting the flow rate of the reducing agent in the sulfuric acid leaching system to maintain the redox potential within the range where manganese is sparingly soluble. This invention utilizes a potential release buffer mechanism to suppress abrupt changes in the interface potential, ensuring that the leaching process is within the thermodynamically stable region of manganese. While extracting lithium, nickel, and cobalt, it achieves in-situ solid-phase retention of manganese, effectively reducing the impurity removal load in subsequent processes.

The utility model provides a device for measuring dissolved oxygen and oxidation-reduction potential of underground water. Comprising an adjustable supporting frame, a cable drum assembly arranged below the adjustable supporting frame, a composite cable arranged on the cable drum assembly, a self-adaptive adjusting assembly arranged at the bottom of the composite cable and a detection assembly arranged at the bottom end of the self-adaptive adjusting assembly. The underground water dissolved oxygen and oxidation-reduction potential detection device can accurately detect underground water dissolved oxygen and oxidation-reduction potential, and signal stability and environmental adaptability are improved.

An object of the present invention is to provide a hydrogen-generating composition capable of suppressing a decrease in apparent quantum yield and increasing the total amount of hydrogen generated, and a method and an apparatus for producing hydrogen using the hydrogen-generating composition.SOLUTION: The hydrogen generating composition contains a pigment having a photocatalytic function, a sacrificial agent, an electron transfer agent having an oxidation-reduction potential higher than that of the pigment and lower than a hydrogen generating potential, and a biocatalyst.SELECTED DRAWING: Figure 3

This invention discloses a two-step pulse electrodeposition method for preparing a nickel-tungsten-cobalt ternary metal oxygen evolution electrode and its application. Specifically, it addresses the Ni... 2+ Co 2+ With W 6+ The large differences in reduction potential and the mismatch in reduction kinetics lead to elemental segregation in single-step deposition. This invention addresses this problem by employing a two-step pulsed electrodeposition strategy: first depositing a Ni-W metal layer, then depositing a Ni-Co metal layer. This strategy optimizes the plating bath composition and pulse parameters step-by-step to accommodate the reduction requirements of different metal ions. The method includes: pretreatment of the nickel-based substrate; performing a first-step pulsed electrodeposition in a solution containing nickel and tungsten salts; and then performing a second-step pulsed electrodeposition in a solution containing nickel and cobalt salts, followed by drying. This invention, through specific two-step deposition and the periodic regulation of the pulsed current, effectively optimizes the loading and dispersion of nickel, tungsten, and cobalt, resulting in a high-performance oxygen evolution electrode with stable and reliable performance, meeting the application requirements of large-scale industrial production.

This invention relates to a highly stable layered oxide sodium-ion battery cathode active material and its preparation method. The chemical formula of the cathode active material is K. x Na y Cu α Ni β Mn 0.6 In the chemical formula O2, x represents the K doping amount; α represents the Cu doping amount; and β represents the Ni doping amount, where 0 ≤ x ≤ 0.35, 0.32 ≤ y ≤ 0.67, 0 ≤ α ≤ 0.4, 0 ≤ β ≤ 0.4, and x + y = 0.67, α + β = 0.4; the positive electrode active material exhibits a layered stacked morphology. This invention employs a novel bi-site substitution strategy, namely, large-radius K... + Riveted to prismatic Na + Position, Cu 2+ Occupied in transition metal sites; large radius K + Occupy Na + The presence of these sites results in larger interlayer spacing, providing more sodium ion storage sites and faster ion transport channels. Furthermore, K... + The larger interlayer spacing resulting from doping corresponds to a multilayered, oriented stacking of nanosheets in the microstructure, which is beneficial for sodium ion transport. This invention possesses high Cu content. 2+ / Cu 3+ Cu substitution with a high redox potential improves the stability of the material when exposed to air and water.

The application relates to the technical field of electrocatalysis, in particular to a bismuth-cerium alloy catalytic electrode for CO2 reduction and a preparation method thereof. The electrode prepared from bismuth-cerium alloy catalyst powder obtained by a conventional method needs a high potential greater than -1 V (vs. RHE) in an electrochemical reduction process. Based on the above problem, the application provides the bismuth-cerium alloy catalytic electrode for CO2 reduction, which forms an alloy layer of Bi and Ce on the surface of a current collector by an electrochemical deposition method, avoids the use of a binder, and has a selectivity of about 98% for formic acid reduction of CO2 at a low potential of -0.8437 V (vs. RHE), is less in side reaction, is low in reduction potential, and has a good application prospect.

The present application relates to the technical field of intelligent management, in particular to a full life cycle environmental management digital system and method for an electroplating park. The system comprises: a composite sensor layout unit that collects the electrochemical impedance spectrum, flow state disturbance signal, trivalent iron ion concentration, oxidation-reduction potential, pH value and temperature of the pipe wall; a deposit identification unit that identifies the initial thickness and composition of the deposit through pattern matching and corrects the fused thickness by taking into account the influence of roughness; an iron ion correction unit that calls a catalytic deposition correction model to generate a correction factor to adjust the fused thickness and output the corrected thickness; a state assessment and early warning unit that generates a confidence score and effectiveness indicator based on multi-parameter fusion and triggers multi-level early warning; and a retired base number generation unit that calculates the total amount of deposit, determines the hazardous waste code and generates a disposal plan. The system realizes accurate identification of deposit thickness and composition, ensuring the scientificity and compliance of pipeline full life cycle management.

The invention provides a remote remediation method for polluted underground water and application, and belongs to the technical field of underground water environment remediation. The method comprises the steps that underground water pollutants and chemicals are physically separated through a clay layer, a first graphite material is arranged in an underground water polluted area, a chemical containing unit is arranged on the clay layer, and chemicals and a second graphite material are arranged in the chemical containing unit; the underground water pollutants are driven to be subjected to oxidation or reduction reaction on the surface of the first graphite material through intrinsic potential differences generated under the action of the medicament and the second graphite material and the action of the underground water pollutants and the first graphite material, and the graphite is utilized to construct an oxidation-reduction potential gradient between the medicament and the underground water pollutants to mediate remote electron transfer; and meanwhile, remote remediation of underground pollution is realized by utilizing the clay layer to mediate remote ion transmission. Remote in-situ remediation of the polluted underground water is achieved through the cross-meter-scale clay layer, and the method is remarkably different from an in-situ remediation method of directly injecting a reagent and has the advantages of being environmentally friendly, flexible, controllable and the like.

The utility model discloses an ORP electrode anti-dry device, which is applied to the ORP electrode field, and comprises a fixed block, one side of the fixed block is provided with a clamping block, the surface of the clamping block is in bolted connection with a clamping rod, the surface of the fixed block is provided with a clamping hole, the clamping hole is in clamping connection with the clamping rod, and the inner wall of the clamping hole is in sliding connection with a push plate; according to the utility model, by pressing the pressing rod, the push plate pushes the clamping rod, so that the clamping rod is separated from the clamping hole, the clamping block is taken down, and the electrode is taken out for replacement, the purpose of conveniently replacing the electrode can be achieved, the workload is reduced, the replacement efficiency is improved, and the electrode is convenient to use; when the water level rises, the floating ball drives the electrode to rise, so that the electrode is always located in water, the purpose of continuous detection can be achieved, the workload is reduced, and the practicability is improved.

The invention provides a permanganate index on-line automatic determination method and system, and the method comprises the steps: synchronously obtaining an oxidation-reduction potential signal, an absorbance signal and a temperature signal of a to-be-detected solution at the same measurement point, and carrying out the temperature drift compensation of the oxidation-reduction potential to extract the potential change characteristics, thereby determining a predicted titration volume interval. If the potential change characteristic meets a first end point judgment condition and the absorbance signal reaches a verification threshold value, determining the corresponding volume as a first end point; if the potential change characteristic does not meet the condition or the absorbance signal does not reach the verification threshold value, the absorbance change characteristic is extracted based on the absorbance signal, and a second end point is determined when a second end point judgment condition is met. And judging a final titration end point according to the obtained number of end points and a difference value between the two end points, and calculating a permanganate index. Through potential and absorbance dual-signal collaborative decision making, the terminal point identification accuracy and the anti-interference capability are improved, and the method is suitable for online automatic monitoring of complex water bodies.

The application provides a kind of digital production supervision method and system, belong to computer field, solve the problem of crack, residual metal, cleaning not thoroughly etc., often rely on the optical inspection or chemical analysis of quartz piece after cleaning, once find problem, have missed the best correction opportunity, lead to rework rate high, low efficiency problem.The above method includes: in the stage of cleaning quartz processing piece after hot processing, automatically match cleaning formula based on quartz processing piece information, the cleaning formula includes washing liquid ratio and cleaning time-temperature control curve;Real-time acquisition of cleaning liquid state change parameter in cleaning tank, the cleaning liquid state parameter includes conductivity and oxidation-reduction potential;The quality defect of the quartz processing piece is evaluated based on the cleaning liquid state change parameter.

The present disclosure relates to an electrochemical device and an electrolyte. The electrochemical device comprises an electrolyte, a positive electrode sheet, a negative electrode sheet, and a separator located between the positive electrode sheet and the negative electrode sheet. The negative electrode sheet comprises a negative current collector and a negative electrode film layer arranged on at least one surface of the negative current collector, wherein the negative electrode film layer comprises a negative electrode active material, the negative electrode material comprising graphite and hard carbon. The electrolyte comprises a first additive and an organic solvent, wherein the organic solvent comprises a carboxylate solvent; the reduction potential of the first additive against lithium is less than 1.3 V; and the mass fraction of the first additive in the electrolyte is 2.5% to 8%.

The invention provides an oxidation-reduction environment quantitative analysis method based on carbonate rock Fe-Mn element in-situ surface scanning. The method comprises the steps that a carbonate rock sample is made into slices, and an analysis area is selected; carrying out in-situ element surface scanning by adopting LA-ICP-TOF-MS to obtain two-dimensional space distribution data of Fe and Mn elements; processing the data to generate an element concentration distribution diagram; on the basis of a Fe-Mn differentiation model, according to the element content and spatial distribution characteristics, the range of the oxidation-reduction potential (Eh) is judged, and when the Fe content and the Mn content are both smaller than 1000 ppm, it is judged that Eh is larger than + 1.23 V; when Mn is larger than 1000 ppm and Fe is smaller than 1000 ppm, it is judged that Eh is larger than + 0.77 V and smaller than + 1.23 V; when the content of Fe and the content of Mn are both larger than 1000 ppm, it is judged that Eh is smaller than + 0.77 V. The method realizes quantitative-semi-quantitative analysis of the paleo-redox state under the micron scale, has the characteristics of high spatial resolution and high precision, and is suitable for a standardized working process of paleo-environment analysis.

The application provides a preparation method of an integrated high-entropy monatomic electrode, comprising the following steps: constructing heteroatom anchor points on the surface of a carbon substrate by using plasma; preparing an electrolyte; using the electrolyte, according to a deposition sequence of standard reduction potentials from high to low of metals to be deposited, performing step-by-step underpotential deposition; and obtaining the integrated high-entropy monatomic electrode through post-processing. The application can directly construct a high-activity electrode on a large-size carbon substrate, realize stable coexistence of various metal monatoms, and is suitable for large-scale industrial application.