30 results about "Oxidation reduction" patented technology

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

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

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

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

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

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

Multiple enzymes may be present in the active area(s) of an electrochemical sensor to facilitate analysis of analytes. The multiple enzymes may function independently to detect several analytes or in concert to detect a single analyte. One configuration includes a first active area and a second active area, where the first active area has an oxidation-reduction potential that is sufficiently separated from the oxidation-reduction potential of the second active area to allow independent signal production. Some configurations may have an active area overcoated with a multi-component membrane containing two or more different membrane polymers. Sensor configurations having multiple enzymes capable of interacting in concert include those in which a first enzyme converts an analyte into a first product and a second enzyme converts the first product into a second product, thereby generating a signal at a working electrode that is proportional to the analyte concentration.

The invention relates to an annealing method of an all-solid-state electrochromic device, and the annealing method comprises the steps: carrying out the annealing treatment of the all-solid-state electrochromic device, and the annealing treatment comprises at least two annealing stages which are sequentially carried out; the annealing treatment comprises an oxidation annealing stage and a reduction annealing stage before and / or after the oxidation annealing stage. According to the annealing method provided by the invention, at least two times of annealing are performed in stages in atmospheres with different oxidation-reduction properties, so that the electrochromism performance and the optical and electrical properties can be synergistically optimized by utilizing the physical and chemical effects of the atmospheres with different properties.

The application provides a method for detecting the redox capacity of a non-homogeneous aqueous medium under different potential conditions, and belongs to the technical field of electrochemical analysis. The method system uses a reticular titanium-based ruthenium iridium oxide coating electrode as a working electrode, improves the upper limit of the sample addition amount of the existing mediated electrochemical analysis system from the mg level to the g level, solves the representativeness problem of the sample in the test of the non-homogeneous aqueous medium, and improves the precision of the redox capacity analysis from mmol e ‑ / kg to μmol e ‑ / kg. By regulating the applied voltage of the working electrode and adding different electronic mediator substances, the test of the redox capacity of the non-homogeneous aqueous medium under different potential conditions can be realized. The method has high sensitivity and good accuracy, in addition, the titanium-based ruthenium iridium oxide coating electrode has strong corrosion resistance, low cost, is convenient to process, and is simple to maintain, and has a good practical application prospect.

This invention relates to the field of photocatalytic materials and green hydrogen production technology, specifically to a g-C3N4 / Mn 0.3 Cd 0.7 S-type Z-type heterojunction photocatalyst, its preparation method and application, a g-C3N4 / Mn 0.3 Cd 0.7 The Z-type heterojunction photocatalyst of S is a 2D g-C3N4 sheet supported on 1D Mn. 0.3 Cd 0.7 A composite structure of S nanorods; wherein Mn 0.3 Cd 0.7 The (002) lattice spacing of S is 0.34 nm, the light absorption edge of the composite catalyst is 540±5 nm, the band gap is 2.35~2.55 eV, and the electrochemical double-layer capacitance is 100.85±2 μF·cm. ‑2 The elements C, N, Mn, Cd, and S are uniformly distributed in the catalyst, and the heterojunction interface forms a close contact. The catalyst has ultra-high hydrogen evolution activity, excellent cycle stability, and strong redox capability.

The invention belongs to the technical field of gel materials, and particularly discloses ionic thermoelectric gel as well as a preparation method and application thereof. The ionic thermoelectric gel comprises a gel matrix and redox couple distributed in the gel matrix, the raw materials of the redox couple comprise at least one of Na42 [MoVI72MoV60O372 (CH3COO) 30 (H2O) 72], K42 [MoVI72MoV60O372 (CH3COO) 30 (H2O) 72] and (NH4) 80 [MoV180MoVI80 (OH) 60O700] 240H2O. The invention further discloses a preparation method of the redox couple. According to the ion thermoelectric gel disclosed by the invention, the redox couple is introduced into the gel matrix, and the redox couple and the gel matrix act together, so that the ion thermoelectric gel has excellent flexibility, wide temperature range tolerance and outstanding thermoelectric conversion efficiency, and can bear relatively high temperature and relatively large temperature difference.

This invention proposes a passivation remediation agent for arsenic-contaminated soil and its application. The passivation remediation agent constructs a ternary synergistic remediation system of zero-valent iron, phosphate, and dithiocarbamate through multi-component synergistic action, mainly including four core mechanisms: redox-adsorption-precipitation-chelation. Simultaneously, biochar, as a carrier, can reduce the risk of zero-valent iron agglomeration and deactivation, maintaining its high reactivity and significantly improving arsenic fixation efficiency. The introduction of dithiocarbamate can fill the gap in the insufficient fixation capacity of traditional iron-based materials for As(III). The calcium phosphate and magnesium phosphate used in this invention hydrolyze in the soil, adjusting the soil pH to a neutral or slightly alkaline range, reducing the solubility of arsenic. The positively charged surface of the iron oxide further facilitates the fixation of negatively charged AsO4. 3‑ Adsorption occurs. Furthermore, the alkaline properties of biochar further enhance this effect.

The present application relates to the field of heterocyclic synthesis and the field of organic photocatalysis, in particular to a preparation method and application of pyrrolo [3,4-c] pyrrole-1,3(2H,5H)-dione derivatives. The present application realizes one-step synthesis of a new photocatalyst, pyrrolo [3,4-c] pyrrole-1,3(2H,5H)-dione derivatives, from tetrahydroisoquinoline and methylene succinimide compounds under catalysis of elemental iodine in an air atmosphere. The technical scheme has the following advantages: (1) the required reagent is stable in nature, does not need pretreatment, is cheap and easy to obtain; (2) one-pot synthesis, obvious economic advantage in steps, no need for water-free and oxygen-free operation, time and labor saving; (3) the molecule itself does not contain metal elements, and no transition metal catalyst is needed, which fundamentally eliminates the problem of metal residues; (4) the use of cheap elemental iodine catalysis reduces environmental pollution and saves reaction cost; (5) the series of derivatives all have suitable oxidation-reduction potentials, and can be used as photocatalysts to catalyze multiple reactions; (5) as a catalyst, the catalytic efficiency is high, and only 0.5-1% loading is needed to catalyze the reaction.

The application belongs to the field of catalysis technology, and particularly relates to a method for studying the mechanism of a chemical chain oxygen carrier, the core of the method being to prepare a core-shell structure of an inert oxide coated with an active component of the oxygen carrier, and using the chemically inert oxide shell as a fixed marker layer for monitoring the dynamic migration path of the bulk metal ions of the oxygen carrier during the oxidation-reduction experiment, and determining the reaction interface of the oxygen carrier for activating the reactant methane, and summarizing the activity mechanism thereof in the oxidation-reduction reaction, and providing ideas for designing a new type of efficient oxygen carrier.

Techniques and systems for neutralizing discharge waters from ballast and / or cooling water biocidal treatment and disinfection systems are provided. The systems utilize oxidation reduction potential control to regulate the dechlorination of a biocidal agent to allowable discharge levels in ship buoyancy systems and ship cooling water systems.

The application discloses a supramolecular nanoscale self-assembly, a preparation method and application thereof, wherein the mass percentage of carbon dots in the supramolecular nanoscale self-assembly is 70-90%, and the mass percentage of methylene blue is 10-30%; the particle size of the supramolecular nanoscale self-assembly is less than 10 nm, the supramolecular nanoscale self-assembly has good water solubility, and the characteristic absorption peak is at 665 nm; the supramolecular nanoscale self-assembly has both the electron transfer capacity of carbon dots and the oxidation-reduction discoloring capacity of methylene blue, can simultaneously accelerate the intracellular and extracellular electron transfer process of electrochemically active bacteria, and then realizes rapid visual screening of the electrochemically active bacteria.

This invention discloses a method for quantitative detection of vanadium ions in vanadium electrolytes by eliminating chloride ion interference. It relates to the field of electrolyte ion detection technology, and includes: collecting a vanadium electrolyte sample containing chloride ions; adding a masking agent solution and allowing it to stand to obtain a chloride ion interference-suppressed sample; adjusting the redox potential of the sample to convert vanadium ions of different valence states into the same detectable valence state, thus obtaining a valence-unified sample; adding a colorimetric reagent solution dropwise to the sample, measuring the absorbance value after each drop, and recording the total volume of colorimetric reagent consumed when the rate of change in absorbance value is lower than a preset threshold; and calculating the total concentration of vanadium ions in the sample based on a standard curve of colorimetric reagent consumption versus vanadium ion concentration. This method effectively avoids chloride ion interference, standardizes the vanadium ion reaction state, and relies on quantitative indicators to determine the titration point, thus completing the quantitative detection of vanadium ions in the vanadium electrolyte.

This application discloses a redox complex and preparation method therefor and use thereof. The redox complex contains a bridged 2,2′-biimidazole structure, through bridging two nitrogen atoms with active hydrogen, stabilizing the structure of the imidazole ring, preventing conformational isomerism of the 2,2′-biimidazole. When the bridged 2,2′-biimidazole structure coordinates with transition metals to form a complex, which significantly improves the efficiency and stability of the complex. Therefore, when the redox complex is used as the electron mediator in sensors, it exhibits a lower oxidation potential, while significantly extending the service life of the sensors.

The present application relates to the technical field of water treatment, and discloses a leachate Fenton treatment process based on a water pollution prevention and control agent, which comprises the following steps: adding a composite catalytic agent composed of an iron-based component and a copper graphite component to leachate, adding an oxidizing agent in a pulse mode and monitoring an oxidation-reduction potential response curve, calculating an instantaneous reaction factor according to the integral area of the curve, adjusting a dosing delay interval and a pump output frequency according to the comparison result of the instantaneous reaction factor and a preset limit value, controlling a fluid shear force generated by a reaction circulating pump in the delay interval, and washing and peeling a passivation layer on the surface of the agent, the present application realizes physical synchronization of agent injection and organic load degradation by dynamically adjusting the dosing frequency, inhibits free radical self-quenching and reduces chemical sludge generation, simultaneously identifies and compensates for the alkalinity of the leachate by using the potential signal characteristics, maintains the stability of the catalytic environment, and improves the leachate treatment efficiency.

This invention discloses an automatic control method for oxidation and flocculation parameters in manganese-zinc wastewater treatment, belonging to the field of industrial wastewater treatment and automation control technology. Addressing the problems of existing processes relying heavily on manual experience and improper integration of oxidation and flocculation stages, this invention first prepares a multifunctional modified material containing dithiocarbamate groups, quinone groups, and pre-complexed manganese-zinc ions. During the acidic oxidation stage, this material and hydrogen peroxide are simultaneously added, and the control system monitors the rate of change of oxidation-reduction potential in real time. When the oxidation-reduction potential reaches a preset threshold and the change curve shows a characteristic change point where the first derivative is zero or changes from positive to negative and is maintained for a preset duration, the system is automatically adjusted to be alkaline, triggering the entrapment and chelation crosslinking reaction of the modified material, ultimately achieving solid-liquid separation. This invention protects the polymer skeleton from indiscriminate attack by free radicals, overcomes the problem of reagent antagonism, and achieves stable compliance of effluent quality.

The application belongs to the technical field of organic photoelectric material, and discloses a kind of tricyclic metal iridium (III) complex containing viologen unit and a preparation method and application thereof, and the iridium (III) complex is composed of two ring metal C^N ligands with strong electron-withdrawing effect modification and a C^N ligand with electroactive viologen substituent group;Two ring metal C^N ligands are modified by electron-withdrawing group to regulate the orbital energy level of iridium (III) complex, reduce the emission energy, promote the near-infrared luminescence of the complex before electric stimulation, utilize the strong electron-withdrawing ability and reversible redox characteristics of viologen substituent group, combine the rich excited state properties of iridium (III) complex, under electric stimulation, the reversible redox reaction of iridium (III) complex occurs, and the electric stimulation phosphorescence response of the material is realized;With the electron-donating property of viologen unit after electric reduction, the transition mode of iridium complex is changed, and the C^N ligand containing viologen substituent group is forced to participate in the excited state transition, realizing the luminescence conversion from near-infrared light to visible light.

The present application relates to the field of water pollution control and treatment technology, and discloses a kind of contaminated water purification's synergistic bioremediation process, comprising: collecting the real-time oxidation-reduction potential of water to be treated and real-time water temperature, using real-time water temperature to compensate potential decay rate to establish metabolic intensity reference value, calculate potential time sequence second-order change rate to identify electron transfer acceleration characteristics, monitor change rate negative peak, and when the deviation of negative peak and metabolic intensity reference value exceeds threshold, start time sequence non-uniform pulsed microbubble aeration, synchronously add electron acceptor, the present application uses the potential gradient formed in aeration moment to drive special degrading bacterial group to directional oxidation of metabolic product formed in acid production stage, selectively inhibit indigenous heterotrophic bacterial group proliferation by potential time sequence rebound, effectively guarantee the colonization advantage and succession stability of remediation bacterial group in open environment.

This invention provides a method for preparing transition metal materials and alloys based on anode-cathode synergistic engineering, belonging to the technical field of transition metal material and alloy preparation. The preparation method involves electrochemical analysis of the transition metal anode to clarify the potential for the transition metal oxidation reaction; electrochemical analysis of the cathode to determine the potential for the transition metal reduction reaction; selecting the current density required for stable deposition of the transition metal through short-time constant-current electrolysis; and using a pulse method, optimizing the pulse period and duty cycle based on the obtained current density to control the pulse electrodeposition of the transition metal at a specific valence state redox potential, thereby preparing transition metal materials and alloys. This invention effectively suppresses the passivation problem at the transition metal interface, stably generates a potential for determining the valence state of the transition metal through anode-cathode synergistic control engineering, and can efficiently manufacture transition metal materials and alloys. It is simple, easy to implement, and suitable for large-scale production.

This invention relates to the field of materials determination technology, and discloses a method for detecting the titanium content in a titanium-containing reagent and a method for detecting the titanium content in a polyolefin catalyst. The method includes the following steps: (1) under an inert gas protective environment, the titanium-containing reagent is acid-hydrolyzed and reduced to obtain a trivalent titanium ion sample solution; (2) under an inert gas protective environment, ferric ammonium sulfate solution is added dropwise to the sample solution, and the potential is tested using a redox electrode during the addition process. The titration endpoint is determined based on the redox electrode potential threshold, and the titanium content is calculated based on the amount of ferric ammonium sulfate solution added at the titration endpoint. This detection method is green and environmentally friendly, and improves the accuracy of the detection results while reducing the detection cost.

he invention discloses a porphyrin-based metal coordination conjugated polymer, a preparation method therefor, and an application thereof in photocatalytic degradation of organic pollutants. The catalyst of the present invention has an 18π-conjugated skeleton, a nearly planar macrocyclic molecule, a stable rigid structure and a very stable highly conjugated system, so that the catalyst has excellent photoelectric conversion efficiency, a wide range of absorption spectra, strong redox capacity, and good chemical and thermal stability. A metal coordinated porphyrin acts as active center, a large number of derivatives can be derived, and the method has emerged as a promising alternative for the photocatalytic degradation of environmental pollutants and the like.

This invention relates to the field of water treatment technology and discloses an advanced oxidation treatment system for broad-spectrum removal of organic pollutants from water. The system includes a reaction module, a sensing module, a dosing module, a power supply module, and a control module. The reaction module is filled with a composite packing material composed of carbon-coated copper-doped two-dimensional titanium carbide catalyst particles, graphite particles, and quartz sand particles, and a three-dimensional volume electrode is constructed using a flow distribution network. The sensing module acquires redox potential and dissolved oxygen concentration data. The control module calculates the spatial decay gradient to determine the state of reaction path obstruction. By adjusting the opening frequency of the pulse dosing valve and the asymmetric pulse waveform output by the power supply module, which includes both cathode and anodic polarization output stages, divalent copper ions on the surface of the composite packing material are reduced by electron injection, and nascent oxygen is precipitated by water electrolysis, achieving spatiotemporal decoupling and reconstruction. This invention solves the problems of reduced treatment efficiency caused by catalytic activity passivation and uneven oxygen source distribution.

The application relates to the technical field of water treatment materials, and discloses a preparation method of a bimetal (Bi7.53Co0.47O11.92) catalyst taking MOF as a precursor. A bimetal oxide photocatalyst with oxygen vacancies is obtained by mixing Bi2O3 with excellent visible light response capability with ZIF-67 and then high-temperature calcination, the mutual action between the internal metals can effectively improve the dispersibility of the material and improve the stability of the material. Compared with other photocatalysts, the bimetal oxide catalyst has stronger adsorption and decomposition capacity on pollutants, and the regeneration capacity of the catalytic species can be accelerated through the oxidation and reduction between different valence states of the transition metals in the material. In addition, the bimetal oxide catalyst has good degradation performance on various organic pollutants, and has excellent broad-spectrum antibacterial performance under light conditions.