255 results about "Chemical reduction" patented technology

The invention discloses composite silver powder with a surface nano-coating structure and a preparation method of the composite silver powder. The composite silver powder comprises a micron-sized spherical silver powder core and a nano-silver shell layer coating the surface of the core, and the nano-silver shell layer comprises nano-silver particles making contact with one another; the D50 particle size of the core body is 1-2 microns, and the particle size D50 of the nano-silver particles is 10-100 nm; the composite spherical silver powder with micron-sized silver coated with nano-silver is prepared through a liquid phase chemical reduction method, the D50 particle size of the composite spherical silver powder is 1.67-1.70 microns, the tap density can reach 5.94 g / cm < 3 >, the specific surface area can reach 0.47 m < 2 > / g, and compared with micron-sized spherical silver powder of a single structure, the conductive performance of the silver powder can be improved by 32%, and the sintering activity is higher.

The invention relates to the technical field of water treatment, in particular to a method for treating degradation-resistant organic pollution underground water based on a micro-interface strengthening technology. According to the technical scheme, the method comprises the steps that an underground water sample is collected and subjected to pollution characteristic analysis, composite material slurry is injected into a water-containing layer to construct an interface-enhanced in-situ reaction system, and the slurry is composed of nanoscale iron-based metal particles, graphene oxide derivatives, modified biochar, a surfactant and the like; meanwhile, a low-pressure gas injection system is arranged to form a micro-aerobic environment so as to improve the interface reaction efficiency, dominant microbial communities are synchronously injected, a slow-release carbon source carrier is added so as to strengthen the biological synergistic degradation effect, and the operation state of the system is regulated and controlled through multi-parameter monitoring. According to the method, a micro-interface synergistic system integrating physical adsorption, chemical reduction and biological metabolism is constructed, refractory organic pollutants such as aryl halide and polycyclic aromatic hydrocarbon in underground water can be efficiently and stably removed, and the method has the advantages of being high in remediation efficiency, high in operation stability and wide in environmental adaptability.

The invention discloses a preparation method of a high-elasticity low-thermal-impedance graphene thermal interface material, which comprises the following steps: vertically dripping graphene oxide slurry on a substrate to form a graphene oxide gel array with a pre-oriented structure, and finally depositing the graphene oxide slurry on the surface to obtain the high-elasticity low-thermal-impedance graphene thermal interface material. And drying to obtain a graphene oxide film with certain vertical orientation inside, and carrying out chemical reduction foaming and high-temperature graphitization to obtain the thermal interface material. In the foaming process, oxygen-containing functional groups on the surface of the graphene oxide are converted into gas, graphene sheets are expanded, physical crosslinking is formed at the edge lap joint positions of the graphene sheets due to the pi-pi conjugation effect, and a quadrilateral-like structure is formed. Compared with a horizontally formed graphene film, the material has the advantages that the proportion of the internal graphene sheets arranged along the vertical direction is higher, the horizontal heat conduction capability is improved, better compression resilience is provided, the thermal impedance is reduced, and the material has wide application potential in the field of thermal interface materials.

The invention discloses a preparation method of a transition metal phosphide catalyst anchored by using a carbon-based material as a carrier and application of the transition metal phosphide catalyst in the field of formic acid hydrogen production, and belongs to the technical field of formic acid hydrogen production catalysis. Transition metal phosphide is anchored on a carbon-based material carrier in situ by adopting a chemical reduction method to obtain a precursor, and the precursor is roasted and pickled in a nitrogen atmosphere to obtain the novel carbon-based material loaded transition metal phosphide catalyst. The catalyst has the advantages of simple preparation method, high catalytic efficiency, cheap non-noble metal raw materials and the like, shows the formic acid conversion rate of 100% and the hydrogen selectivity of 99% or above in the catalytic gas-phase formic acid hydrogen production reaction, and also has good catalytic stability.

The invention provides a preparation method of a graphene aerogel composite electrode material for an energy storage capacitor. The preparation method comprises the following steps: preparing a graphene composite material; and putting the graphene composite material into a coaxial DBD reactor for treatment. Freeze-drying the wet gel, and reserving a pore structure to obtain the GA block material. GA is soaked in a manganous nitrate solution, and a metal oxide nanosheet grows in situ through a hydrothermal method. And cutting the GA block into sheets, directly pressing and attaching the sheets to a foamed nickel current collector, carrying out vacuum drying, and preparing an electrode plate by using a hydraulic machine. According to the method, rapid reduction, precise structure regulation and control and functional compounding of the graphene aerogel are realized, reduction of GO, three-dimensional crosslinking and in-situ loading of a functional material are synchronously completed under a vacuum condition by optimizing plasma energy input and a gas environment, pollution of a chemical reducing agent and energy consumption of high-temperature treatment are avoided, and the method is suitable for large-scale industrial production. And the porosity, the conductivity and the interface bonding strength of the GA can be accurately regulated and controlled.

The application discloses a copper-bismuth bimetallic catalyst and a preparation method and application thereof. The copper-bismuth bimetallic catalyst comprises a copper substrate and copper-bismuth nanowires grown on the copper substrate, the copper-bismuth nanowires comprise copper nanowires and a metal bismuth layer loaded on the copper nanowires, and the mass fraction of bismuth in the copper-bismuth nanowires is 40% to 60%. The preparation method of the catalyst comprises the following steps: after in-situ growth of copper hydroxide nanowires on the copper substrate, the copper-bismuth bimetallic catalyst is prepared through heat treatment, electrochemical reduction treatment and bismuth deposition. Meanwhile, the copper-bismuth bimetallic catalyst can not only make full use of the copper and bismuth bimetallic effect, effectively improve the activity, stability and selectivity of electrocatalytic reduction of carbon dioxide, but also has the advantages of simple and controllable preparation, wide application potential window and wide application environment.

The invention discloses a carbon-deficient wastewater nitrate removal method based on water flow power, and belongs to the technical field of water treatment and environment restoration. According to the method, NO3-containing wastewater flows through a porous medium reactor at a certain flow speed, and contact between water flow and the surface of a filling material is utilized; the method comprises the following steps: by taking NO3 as a raw material, separating and inducing a contact electric effect, generating hydrogen free radicals with strong reducibility in situ, and realizing efficient non-biological reduction by utilizing a chemical reaction of the hydrogen free radicals and NO3 under the condition of not depending on an external carbon source or a chemical reducing agent. The method is mild in reaction condition, can be operated at normal temperature and normal pressure, has the advantages of simplicity and convenience in operation, low cost, no secondary pollution, wide medium source, reusability and the like, and is particularly suitable for NO3 pollution treatment in underground water, agricultural drainage and other carbon source lacking scenes.

This invention belongs to the field of SERS detection technology and relates to the application of an Ag / Bi4O5Br2 / Ni-Fe double hydroxide composite SERS substrate in the detection of CV in wastewater. First, a Bi4O5Br2 / Ni-Fe double hydroxide is prepared, and silver nanoparticles are loaded onto its surface using a liquid-phase chemical reduction method. This material combines the LSPR effect of silver nanoparticles with the interfacial coupling and multiple active sites of the Ni-Fe double hydroxide, enabling the regulation of interfacial charge transfer and enhancing molecular adsorption. Utilizing the excellent adsorption and enrichment properties of Bi4O5Br2, a highly efficient charge transport system is synergistically constructed from multiple components, improving the SERS chemical enhancement effect and amplifying the CV Raman signal. This invention overcomes the shortcomings of weak signals and insufficient stability of single substrates, achieving sensitive detection of trace CV in water. The substrate preparation process is simple, environmentally friendly, and highly practical, showing broad application prospects in the field of trace CV analysis in aquatic environments.

This invention provides a composite electrode for the comprehensive recovery of valuable metals, its preparation method, and its application. The composite electrode comprises a positive electrode active layer and a modified matrix layer. The modified matrix layer includes a tubular solid electrolyte body and a modified material layer disposed on the surface of the tubular solid electrolyte body; the modified material layer comprises a conductive polymer. The electrochemical lithium extraction combined with chemical reduction leaching of nickel, cobalt, and manganese using this composite electrode not only achieves high-efficiency recovery of valuable metals such as lithium, nickel, cobalt, and manganese, but also significantly reduces wastewater treatment costs and environmental risks.

This invention relates to the field of nano-silver powder preparation technology, specifically a method for preparing high-tap-density, high-purity silver powder. This invention overcomes the problems of insufficient purity and low tap density in existing silver powder technologies. The invention involves preparing a solution of silver nitrate, performing electrolytic pretreatment, and then obtaining a silver powder suspension through chemical reduction, co-precipitation, and dissolution-reduction processes. The silver powder suspension is then subjected to physical vapor deposition, where silver vapor is deposited onto the silver powder surface under the action of argon gas, resulting in a dense arrangement of silver powder particles. An electrolyte is then prepared using silver nitrate and bismuth nitrate for electrolytic refining. Finally, high-tap-density, high-purity silver powder is obtained through ultrasonic dispersion and supercritical fluid drying. By strictly controlling the process sequence and parameters, and utilizing the synergistic effect between each process, impurities are effectively removed, the particle size distribution of the nano-silver powder is optimized, and the purity and tap density of the nano-silver powder are improved, thus optimizing the application of silver powder in conductive materials.

This invention belongs to the field of composite material preparation technology, and provides an antibacterial activated carbon-silver ion composite photocatalyst and its preparation method. First, a nitrogen-doped titanium dioxide composite carbon dot core material is prepared using a hydrothermal method and high-temperature calcination, with titanium source, nitrogen source, and self-made carbon dots as raw materials. The core material is then surface-modified using a mercaptosilane coupling agent, and nano-silver is loaded in situ onto its surface via chemical reduction to obtain a multifunctional nanopowder. Simultaneously, activated carbon undergoes surface oxidation and amination treatment, and is grafted with the active ester polyethylene glycol maleimide, thereby constructing specific reaction sites on the activated carbon surface. Finally, the multifunctional nanopowder is covalently bonded to the activated carbon carrier surface using the Michael addition reaction between maleimide and mercapto groups. The resulting composite powder is then mixed with a dispersion medium and functional additives to obtain the antibacterial activated carbon-silver ion composite photocatalyst.

The invention discloses a chromium-containing wastewater treatment and recovery treatment line and a recovery treatment method thereof. The ion exchange system is used for carrying out ion exchange adsorption on the hexavalent wastewater; the alkali washing system is used for outputting alkali liquor to the ion exchange system; the washing system is used for outputting washing water to the ion exchange system; the pickling system is used for outputting acid liquor to the ion exchange system; the chromium recovery treatment branch line is used for receiving the hexavalent wastewater of the ion exchange system, mixing the hexavalent wastewater with sulfur powder and alkali liquor to prepare chromium hydroxide, then carrying out filter pressing on the chromium hydroxide, outputting a chromium hydroxide filter cake to the recovery calcination treatment line, and outputting a press filtrate to the press filtrate recovery branch line; the press filtrate recovery branch line is used for recovering sodium thiosulfate from the press filtrate; and the recycling and calcining treatment line is used for calcining the chromium hydroxide filter cake into Cr2O3. According to the scheme, the purposes of micro discharge and even zero discharge of the chromium-containing wastewater are achieved, and the problem that a large amount of chromium-containing hazardous waste sludge is generated by depending on a chemical reduction-precipitation method in traditional chromium-containing wastewater treatment is solved.

This invention discloses a method for preparing and applying a sodium borohydride-modified self-supporting anode for AEM water electrolyzers. Firstly, an amorphous ternary metal hydroxyl oxide precursor is grown in situ on a nickel substrate via room temperature liquid phase deposition. The process involves the presence of Co in solution. 2+ Fe 3+ Ni ions are introduced through slight corrosion of the nickel foam matrix. 2+ The ions, the three, and the OH- produced by hydrolysis ⁻ Co-deposition occurs under the influence of dissolved oxygen, leading to the self-assembly of amorphous nanosheet structures on the substrate surface. Subsequently, a mild chemical reduction treatment with sodium borohydride solution is used to obtain a structurally stable and high-performance self-supporting electrode. The method described in this embodiment is mild, simple, low-cost, and has good versatility.

To provide a method for reducing a metal ore.SOLUTION: There is provided a process for reducing a metal ore, the process comprising: providing a biomass feedstock; pyrolyzing the biomass feedstock, thereby generating a biogenic reagent and a pyrolysis off-gas, wherein the biogenic reagent comprises carbon, wherein the pyrolysis off-gas comprises hydrogen or carbon monoxide; obtaining a metal ore, wherein the metal ore comprises a metal oxide and the metal ore is in particulate form; combining the carbon with the metal ore, thereby generating a carbon-metal ore particulate; and chemically reducing the metal oxide, wherein the chemically reducing is achieved using the pyrolysis off-gas.SELECTED DRAWING: Figure 1

The present invention discloses a method for recycling positive electrode materials of lithium-ion batteries driven by light, comprising the following steps: constructing a water / oil two-phase light-driven recycling system, wherein a photocatalyst is dispersed in an upper oil phase, and a lithium-ion battery positive electrode material and an acid are dispersed in a lower water phase; applying light to the water / oil two-phase light-driven recycling system under an oxygen or air atmosphere to drive a catalytic reaction, causing metal ions to leach from the positive electrode material of the lithium-ion battery, and then using a chemical precipitation method to achieve metal ion recovery. The present invention proposes a green method for recycling positive electrode materials of lithium-ion batteries driven by photocatalysis, which achieves efficient recovery of high-value metals such as lithium and cobalt by coupling the photocatalytic-photothermal synergistic effect and oil-water interface regulation. Compared with existing recycling processes, the present invention abandons the external heating device and the addition of chemical reducing agents, providing a green, low-energy and low-cost strategy for the recycling of lithium-ion batteries.

The application discloses a kind of Bi / OVs-Bi2WO6-Cl catalysts with multiple active sites synergy and a preparation method and application thereof, and belongs to the field of photocatalysis technology, the application uses hydrothermal method to dope Cl into Bi2WO6, then in-situ reduction is generated by using chemical reduction method Bi element and oxygen vacancy, the introduction of multiple active sites, on the one hand, promote the effective separation of photoinduced electron-hole pairs, fully play the catalytic performance of semiconductor, on the other hand, can provide more CO2 activation site, finally make Bi / OVs-Bi2WO6-Cl photocatalyst have better CO2 reduction performance;The material has high photocatalytic selectivity, and the production cost is low, and the production process is simple.

The application relates to a method for synthesizing 1,1-bisaryl compounds by using non-activated alkenes, and belongs to the fields of organic synthesis methods and electrochemical catalysis. The application solves the technical problem that the existing reaction technology cannot realize efficient coupling of non-activated alkenes and halogenated arenes to generate 1,1-bisaryl compound products. In the application, a nickel catalyst is reduced on a cathode by a constant current under an inert gas atmosphere, then a secondary oxidative addition is carried out with another halogenated arene, and finally a 1,1-bisaryl compound product is generated through a reductive elimination step. The nickel catalyst circulates in the reaction by maintaining its valence state under electrochemical conditions, effectively avoiding the use of an additional chemical reducing agent, simplifying the operation and reducing the environmental burden. The reaction system of the application has high efficiency and universality, and can be applied to various halogenated arenes and non-activated alkenes under mild conditions, and has significant application value in the modification and synthesis of natural products and drug molecules.

The application is a kind of continuous preparation method and application of core-shell type reduced Cu-based catalyst. The method uses membrane dispersion micro-reactor technology, adopts liquid phase chemical reduction method with potassium borohydride-hydrazine hydrate as double reducing agent, continuously prepares reduced Cu-based nanoscale catalyst, does not need high temperature calcination and hydrogen reduction, can be directly used as active catalyst for catalytic reaction, and realizes green and efficient preparation. The catalyst prepared by the application is used in the reaction of preparing N-butyl-2,2,6,6-tetramethyl-4-piperidinamine from 2,2,6,6-tetramethyl-4-piperidinone and n-butylamine through reductive amination, and excellent catalytic activity and stability are shown.

The application relates to a heavy metal capturing agent immobilized multifunctional Fenton-like catalyst, a preparation method and application thereof, and belongs to the technical field of water treatment. The catalyst contains a-S-Fe-S-main active structure, has non-photocatalytic activity and photocatalytic activity, and can efficiently catalyze degradation of organic pollutants under light and no light conditions. The catalyst is prepared by a coprecipitation method. The method is simple in process and mild in conditions. The prepared heavy metal capturing agent immobilized Fenton-like catalyst has non-photocatalytic activity and photocatalytic activity, and has excellent catalytic degradation effect under acidic and neutral conditions, stable catalytic performance, and can continuously degrade pollutants under light conditions. Under no light conditions, the catalyst can be regenerated through photocatalytic reduction and chemical reductant reduction, and can be recycled for multiple times. In addition, the catalyst is not prone to forming iron mud and has no adverse effects on the environment.

The invention discloses a preparation method and application of a Fe-Ni-C ternary three-dimensional electrode, the preparation method comprises the following steps: firstly, treating a landfill leachate membrane concentrated solution through a three-dimensional electro-Fenton technology, introducing a Fe-Ni-C ternary electrode to construct a three-dimensional electro-Fenton system, and removing refractory organic pollutants in the concentrated solution by anodic oxidation and in-situ Fenton reaction to obtain the Fe-Ni-C ternary three-dimensional electrode. Then, the electrochemical reduction technology is used for treating three-dimensional electro-Fenton effluent, a cathode is used for reducing nitrogen pollutants mainly containing NO3 <->-N, the landfill leachate membrane concentrated solution is treated through the two-stage combined treatment process of three-dimensional electro-Fenton combined electrochemical reduction, and finally efficient treatment of organic matter and nitrogen pollutants in the membrane concentrated solution is achieved.

This invention belongs to the field of photoelectric active materials and photoelectric sensing analysis technology, specifically relating to a Z-type heterojunction composite material, its preparation method, and its application. The composite material uses Ti-MOF as a precursor, annealing to obtain carboxyl-functionalized p-type 2DTiO2@C nanocakes. Chemical reduction forms AuNPs in situ on the surface of the 2DTiO2@C nanocakes, obtaining p-type 2DTiO2@C / Au nanocakes. Amino-modified p-type 3D peony-shaped BiOI is added to the p-type 2DTiO2@C / Au nanocakes, and electrostatic interaction yields the 2DTiO2@C / Au / 3DBiOI Z-type heterojunction composite material. This invention uses a metal-organic framework template-assisted calcination method, chemical reduction, and electrostatic interaction to design and prepare the Z-type heterojunction composite material, improving photoelectric activity and achieving rapid, highly sensitive, accurate, and reliable detection of hexavalent chromium ions.

The invention relates to the technical field of silver powder production control, and discloses a production control method and system for silver powder and a storage medium. The method comprises the following steps: mounting a sensor array on a chemical reduction reaction kettle to collect data to form a process parameter set; filtering the parameter set to obtain a quality prediction factor; performing sectional temperature regulation and control based on the predictive factor, and dynamically controlling the reaction to obtain silver powder suspension; and inputting the suspension into a self-adaptive centrifugal system, and adjusting process parameters according to the sedimentation efficiency. The problem of multi-parameter collaborative optimization in a traditional silver powder production control method is solved, the problems that in the chemical reduction method preparation process, the concentration of silver ions fluctuates, the adding rate of a reducing agent is unstable, and the reaction temperature is difficult to accurately control are solved, and self-adaptive centrifugal separation and intelligent washing control in the silver powder post-treatment process are achieved.

The disclosure relates to a catalyst suitable for electrochemical reduction reactions of one or more carbon oxides, comprising a nitride-doped multi-metallic material comprising a primary metal being copper and one or more secondary metals selected from silver, gold, platinum, palladium, ruthenium, iridium, osmium, and any mixture thereof, wherein the nitride-doped multi-metallic material comprises, as determined by XRD, copper, copper nitride and copper-Me alloy wherein Me is one of the secondary metals and to a gas diffusion electrode suitable for electrolysis of one or more carbon oxides comprising such a catalyst.

The invention discloses a preparation method and application of a cerium-doped CoTeO3 nano-cluster catalyst, and belongs to the technical field of chemical energy materials. The preparation process comprises the following steps: firstly preparing a metal salt solution and a NaHTe solution, dropwise adding the NaHTe solution into the metal salt solution, stirring, centrifuging, cleaning and drying to obtain the cerium-doped CoTeO3 nano-cluster catalyst. The cerium-doped CoTeO3 nano-cluster catalyst prepared by the invention is constructed by a chemical reduction method, the conductivity of the catalyst is remarkably enhanced by introducing transition metal telluride, and the electronic structure of active sites is further optimized by doping rare earth cerium. In an electrocatalytic oxygen evolution reaction (OER), the catalyst breaks through the energy barrier limitation of a catalytic reaction intermediate by introducing a lattice oxygen oxidation mechanism (LOM), shows excellent catalytic activity and stability, and shows a good industrial application prospect.

The present invention relates to a hollow nanocage structured silver-doped nickel cobaltate / nickel oxide gas-sensitive material, and its preparation method and application. The method uses dimethyl imidazole cobalt as a structure-directing agent, combined with a nickel-cobalt layered double hydroxide derivatization method and a chemical reduction method, to simultaneously achieve triple optimization of the material's microstructure, interface energy band gap, and composition. The unique hollow nanocage structure of the prepared composite material greatly increases its contact area with the gas being detected; the interface heterojunction formed by nickel cobaltate and nickel oxide in the material accelerates the efficiency of interfacial electron transmission; and silver doping increases the number of electron transitions during the detection process. Gas-sensing experiments have shown that the composite material has high selectivity, sensitivity, and stability for the volatile organic gas n-butanol at a relatively low operating temperature, and is suitable for the detection of trace n-butanol in complex environments. The preparation method has mild conditions, low cost, and good industrialization prospects, and has broad application prospects in the field of gas-sensitive material preparation.

The invention discloses preparation and application of a multi-site copper-based nanocrystal loaded noble metal monatomic catalyst, which comprises the following steps: dispersing copper-based precursors such as copper, copper oxide, cuprous oxide, copper sulfide and the like in cyclohexane to obtain a precursor dispersion liquid, stirring and heating to 150-300 DEG C, injecting a noble metal salt solution, reacting for 20-60 minutes, cleaning, and drying to obtain the multi-site copper-based nanocrystal loaded noble metal monatomic catalyst. The multi-site copper-based nanocrystal loaded noble metal monatomic catalyst dispersed in cyclohexane is obtained, noble metal is loaded on copper-based nanocrystals in a monatomic form, and the catalyst has relatively high electro-catalytic activity and ethylene selectivity and can be used for preparing hydrocarbon products through electrochemical reduction of carbon dioxide.

The invention provides a precious metal platinum-doped nano zinc oxide photocatalyst, a preparation method and application, and relates to the technical field of catalyst synthesis. The method specifically comprises the following steps: pretreating a natural biological material with a hierarchical porous structure as a soft template, and freeze-drying to obtain a Zn < 2 + > supported biological template; placing the template in a mixed solvent, performing microwave hydrothermal synthesis to obtain a ZnO (at) biological template, and performing centrifugal washing; preparing a doping solution containing noble metal ions, dissolving the ZnO (at) biological template in the doping solution containing noble metal ions, and irradiating under ultraviolet light; calcining in an air atmosphere, and then immersing a product into a citric acid solution to obtain the catalyst. By combining a natural biological template with microwave-assisted hydrothermal and in-situ photochemical reduction technologies, uniform doping of ultralow noble metals (Pt, Pd, Au and the like) in a ZnO hierarchical porous structure is realized, and material morphology regulation and control and active site construction are synchronously completed.

The invention discloses preparation of an electrode for an electrochemical separation system and a separation material of the electrode. The preparation method comprises the following steps: selecting a lithium titanium oxide, a layered double-metal hydroxide, a Prussian blue analogue or a layered manganese oxide as a substrate; the method comprises the following steps: introducing an electrochemical active component into a substrate by any one or a combination of the following modes: doping heterovalent or covalent transition metal ions into lattice sites of a substrate material, introducing oxygen vacancies into the substrate by a reducing atmosphere sintering or chemical reduction method, and doping heteroatoms into the substrate material; the method comprises the following steps: removing impurities from a substrate introduced with an electrochemical active component, and then carrying out electrochemical cycle pretreatment to stabilize active sites;

The invention discloses a high-activity non-enzymatic glucose sensor catalyst and a preparation method thereof. The catalyst takes a carbon material as a carrier and CuO as a catalytic active component. The preparation method comprises the following specific preparation steps: uniformly loading the active component on the carbon substrate through a chemical reduction method, and then carrying out annealing treatment in a muffle furnace to obtain the catalyst. According to the preparation method of the non-enzymatic glucose sensor catalyst with the CuO active component loaded on the carbon material, the steps of chemical reduction and thermal annealing treatment are adopted, the operation is simple, and the preparation method is suitable for large-scale preparation. The obtained catalyst is uniform in active component distribution, shows excellent glucose electrocatalytic oxidation performance, and can be applied to a non-enzymatic glucose sensor for glucose detection.

The invention discloses a microfluidic device for in-situ measurement of a carbon dioxide diffusion coefficient in an electrochemical reduction reaction system and a method and application thereof. The microfluidic device comprises a T-shaped microfluidic assembly, and the T-shaped microfluidic assembly comprises a cover plate and a microchannel substrate matched with the cover plate; the micro-channel substrate is provided with an anode and a cathode, and the anode and the cathode are communicated through a linear flow channel E arranged on the surface of the micro-channel substrate. After the 18-crown ether-6 is added into the KHCO3 electrolyte, the measured value of the carbon dioxide diffusion coefficient is kept at a constant value of 1.42 * 10 <-9 > m < 2 > / s under different current densities; after the 18-crown ether-6 is added into the electrolyte, the trend of the measurement result of the carbon dioxide diffusion coefficient is consistent with that of the classical diffusion theory, which indicates that the measurement result of the carbon dioxide diffusion coefficient measured after the 18-crown ether-6 is added is correct.