87 results about "Redox cycle" patented technology

The invention discloses a pH response Ti < 3 > C < 2 > T < x >-based polyvinyl butyral self-repairing anti-corrosion coating and a preparation method thereof. The preparation method comprises the following steps: preparing Ti < 3 > C < 2 > T < x > (at) PDA by polymerizing dopamine on the surface of a Ti < 3 > C < 2 > T < x > (at) PDA, loading Ce-P-I < m >-MOF onto the Ti < 3 > C < 2 > T < x > (at) PDA, finally mixing into polyvinyl butyral-methanol, and coating on the surface of a copper plate to obtain the pH-responsive Ti < 3 > C < 2 > T < x >-based polyvinyl butyral self-repairing anticorrosive coating. Wherein PDA has the dual effects of improving the dispersibility and oxidation resistance of Ti3C2Tx and inhibiting corrosion promotion; imidazole in Ce-P-Im-MOF responds to the pH change of a corrosion area through redox cycle, cerium ions and phosphate radicals are dynamically released to form a passivation film, the Ti3C2Tx nanosheet labyrinth effect is overlaid, a'dynamic passivation-physical shielding-conductive regulation 'triple anti-corrosion mechanism is formed, and the corrosion resistance of a matrix is remarkably improved.

The invention discloses a method for preparing synthesis gas through methane chemical chain reforming. According to the method, an iron-based oxygen carrier is cyclically operated in a system comprising a reduction reactor, a reforming reactor and an air reactor. Comprising the following steps: reacting a complete iron oxide-based oxygen carrier regenerated in an air reactor with a part of synthesis gas generated by a reforming reactor in a reduction reactor to generate a gas mixture of water and carbon dioxide and a part of reduced iron-based oxygen carrier; the partially reduced iron-based oxygen carrier is introduced into a reforming reactor and reacts with biogas for reforming and deep reduction of the oxygen carrier, and a target product synthesis gas and the deeply reduced iron-based oxygen carrier are generated; and finally, introducing the deeply reduced iron-based oxygen carrier into an air reactor, reacting with air to regenerate a completely oxidized iron-based oxygen carrier, circulating the completely oxidized iron-based oxygen carrier to the reduction reactor for use, and generating oxygen-deficient air at the same time. According to the invention, through redox cycle of the iron-based oxygen carrier, biogas and air are used as raw materials, and efficient conversion from biogas to high-quality synthesis gas is realized.

This disclosure provides redox cyclable molecules for energy storage. These molecules belong to either the 4H-pyran-4-ylidene family or include a six-membered aromatic ring with one nitrogen atom at position 1 (pyridinium family) or two nitrogen atoms at positions 1 and 4 (pyrazinium family) or at positions 1 and 3 (pyrimidinium family). Molecules in these families are used as analytes in redox flow batteries.

The invention discloses an iron-copper diatomic catalyst with sustainable dual oxidation-reduction cycles as well as a preparation method and application of the iron-copper diatomic catalyst. A carrier of the iron-copper diatom catalyst is graphite phase carbon nitride, iron-copper diatoms are combined on the carrier through an N4-Fe-Cu-N3 coordination structure, and the coordination effect of the iron-copper diatoms enables the iron-copper diatom catalyst to efficiently activate hydrogen peroxide through continuous iron-copper dual redox cycle; the mass fractions of iron and copper diatoms in the catalyst are respectively 1%-10% and 3%-15%, so that the diatom catalyst capable of realizing the sustainable dual redox cycle can effectively activate hydrogen peroxide in the process of degrading organic pollutants, and meanwhile, the pollutants are efficiently degraded.

The invention relates to the technical field of sewage treatment, and discloses a preparation method of a porous ceramic loaded sulfur-based composite filler and application of the porous ceramic loaded sulfur-based composite filler in nitrogen and phosphorus removal of sewage. Porous ceramic is taken as a carrier, active components are loaded in a layered manner by adopting a gradient filling process, an inner-layer siderite composite gel and calcite complex dynamically neutralizes H < + > generated by sulfur autotrophy, and pH buffering is realized through sulfo group reversible proton exchange; the compressive strength of the middle-layer pyrite composite gel is improved through C-O-Fe bonding, a Pi-Pi conjugate electron pathway is constructed by polypyrrole-coated hybrid gel, electron transfer is accelerated, and Fe < 2 + > is released to precipitate phosphate; sulfur-charcoal on the outer layer forms nano sulfur crystals, and denitrification is quickly started by utilizing a high specific surface area. Sulfur consumption and sulfate accumulation are reduced through sulfur-iron oxidation-reduction circulation. The filler realizes high-efficiency nitrogen and phosphorus removal of sewage under the condition that a carbon source and a pH regulator are not required to be additionally added.

The invention discloses a ferrocene-based D-A type multi-system conjugated small molecule synthesis method, which comprises: carrying out a heating reaction in an organic solvent by using a ferrocenyl compound and a bromophenyl compound as raw materials and using a palladium complex as a catalyst, and after the reaction is completed, carrying out extraction, column chromatography and recrystallization to prepare an intermediate; the obtained intermediate and a 4-pyridine boric acid compound are used as raw materials, a palladium complex is used as a catalyst, a heating reaction is conducted in an organic solvent, and after the reaction is finished, cooling, extraction, column chromatography and recrystallization are conducted to prepare the D-A type multi-system conjugated small molecules. The invention also discloses a memory device with a sandwich structure and application of the memory device to ultra-high density information storage. The small molecular material prepared by the invention not only can realize ternary information storage performance, but also greatly improves the stability of the device through stable redox cycle of the ferrocene group, and realizes long-time stable ultrahigh-density information storage.

The invention discloses cerium oxide / piezoelectric material composite nano-enzyme for an antifouling coating as well as a preparation method and application of the cerium oxide / piezoelectric material composite nano-enzyme, and belongs to the technical field of material chemistry and marine protection. The preparation method of the composite nano-enzyme comprises the following steps: dispersing a metal cerium source and a piezoelectric material source in a solvent according to a mass ratio of 1: (1-5), carrying out phase formation and composite treatment, and collecting a solid product after treatment, thereby obtaining the composite nano-enzyme. The composite nano-enzyme can be used for marine antifouling paint to form a functional material system capable of realizing self-driven antifouling by directly utilizing mechanical energy such as ocean waves, vibration and the like. According to the system, mechanical energy is converted into electrochemical energy to drive in-situ generation of H2O2, and Ce < 3 + > / Ce < 4 + > redox cycle is utilized to efficiently convert H2O2 into ROS, so that sustainable antibacterial and anti-biological adhesion effects are achieved, toxic substances are not released, and the system belongs to an environment-friendly protection technology.

The invention provides a method for degrading antibiotic wastewater based on an SR-AOPs mediated Fenton system, which comprises the following steps: putting a Fenton reaction Fe3O4-MXene catalytic material into antibiotic wastewater to construct a catalytic system, and activating persulfate to catalytically degrade the antibiotic wastewater for 0-30 minutes; the addition amount of the Fenton reaction Fe3O4-MXene catalytic material is 100-200 mg / L. A catalytic system which does not need to be additionally provided with H2O2 and an iron source and can produce H2O2 in situ is constructed, mixed reactive oxygen species (ROS) generated in the catalytic system is used for degrading antibiotic wastewater, the oxidation efficiency is high, the cost is low, and the stability is good; according to the catalytic material, Fe3O4 nanoparticles are integrated to interlayer and heterogeneous surfaces of MXene to form a double-catalytic-center structure, a Fe3O4-MXene heterostructure promotes sustainable redox cycle of Fe < 2 + > / Fe < 3 + > through electron transfer, O2 is reduced to generate H2O2, PMS is synergistically activated to generate hydroxyl radicals (OH) to drive efficient Fenton reaction, the preparation method is simple, the stability is good after multiple times of cycle use, and the catalytic material is suitable for industrial production. And secondary pollution can be avoided through magnetic recovery.

The invention relates to the technical field of catalyst preparation, in particular to a catalyst for preparing 2, 4-dichlorobenzonitrile and a preparation process of the catalyst. The prepared catalyst overcomes the problems that a traditional catalyst for synthesizing 2, 4-dichlorobenzonitrile is poor in catalytic property and poor in catalytic cycle stability. The catalyst is composed of main active metals containing vanadium / molybdenum / tungsten and the like, rare earth metals, acid and alkali metals and other active components and a molecular sieve carrier, and the conversion rate and selectivity of ammoxidation reaction are significantly improved through the synergistic effect of the multi-metal components and through the mechanisms of redox cycle, electron transfer regulation and control, acid site optimization and the like. The carrier adopts a hydrothermal synthesis process, and is subjected to pre-crystallization, crystallization, calcination, ammonium chloride exchange and other steps to form a regular pore channel structure, so that the metal-carrier interaction is enhanced, and the activity stability in recycling is guaranteed; according to the mixing process, through two-stage calcination and accurate proportion regulation and control, uniform loading of active metal is achieved, and the finally prepared catalyst is excellent in catalytic performance and high in stability.

The invention relates to the technical field of catalyst preparation, and particularly discloses a catalyst for efficient coal-based synthesis of dimethyl carbonate and a preparation method thereof.The catalyst comprises, by weight, 85%-88% of a coal-based activated carbon carrier, 7%-8% of copper oxide, 3%-4% of zinc oxide, 1%-2% of aluminum oxide and 1%-2% of rare earth oxide; the coal-based carbon material is used as the carrier, so that the thermal stability and the surface adsorption capacity of the catalyst are remarkably improved; after CeO2 is introduced, the redox cycle efficiency is improved, and the methanol conversion rate and DMC selectivity are enhanced; a pore structure is improved through a coal tar blending carbonization technology, and reactant molecule diffusion and product desorption are facilitated; the catalyst is stable in structure, long in continuous reaction time and good in renewability and industrial adaptability, organic functional groups in coal can be directionally reserved through multiple treatment means, high-density defect sites can be constructed, and the loading performance of the catalyst is enhanced.

The invention relates to an application of a phosphorus vacancy mediated transition metal-based cathode material in electro-Fenton-like selective degradation of metronidazole antibiotics. The phosphorus vacancy-mediated transition metal-based cathode material is NiCoP-Vp, foamed nickel is used as a substrate, and a phosphorus vacancy-containing NiCoP catalyst is loaded on the surface of the substrate; the NiCoP catalyst containing the phosphorus vacancy is in a nanoneedle shape, and a large number of holes are formed in the surface of the NiCoP catalyst. The transition metal-based catalyst containing the phosphorus vacancy has higher electron transmission efficiency and relatively larger electrochemical active area, more active sites can be exposed, and 100% removal of metronidazole can be selectively realized. The fully exposed active sites provide more sites for the adsorption and activation of H2O2 and O2, the improved charge transfer can accelerate the redox cycle of transition metals, the two can cooperatively regulate and control to generate superoxide free radicals O2 <.-> and high-valence metal oxygen, and finally the selective efficient degradation of metronidazole antibiotics is realized.

The invention relates to the technical field of quartz material purification, in particular to a quartz material electrochemical redox cycle purification device which comprises a purification barrel, a conveying belt, a rotating shaft, an intermittent motor, a bearing barrel and a scrubbing unit. The method can solve the following problems in the purification process of the quartz material in the prior art: corresponding electrochemical oxidation reduction and acid pickling purification cannot be performed on the quartz material, and impurities which cannot be removed are easily contained in the quartz material only through heating and microwave treatment, so that the purity of the quartz material is influenced; according to the device, the conveying belt drives the quartz material to be intermittently conveyed, so that the conveying belt drives the quartz material to sequentially move into the multiple bearing barrels for electrochemical reduction, acid pickling reaction and cleaning, the quartz material can be effectively purified, and the reacted quartz material can be cleaned; therefore, the purity of the cleaned quartz material is ensured.

The invention is applicable to the technical field of treatment of organic pollutants in water, and provides a catalytic material for degrading perfluoro-polyfluorinated compounds as well as a preparation method and application of the catalytic material. Through defect engineering and crystal face regulation and control, the CoFe2O4 / BiOCl (010)-Ovs heterojunction material rich in oxygen vacancies is constructed. According to the material, the conductivity is remarkably enhanced, the light response range is widened, reaction active sites are enriched, separation and migration of photon-generated carriers are promoted, the electron-hole utilization efficiency is improved, and then the photoelectrocatalysis performance is improved. The material accelerates the redox cycle of Co < 2 + > / Co < 3 + > and Fe < 2 + > / Fe < 3 + >, significantly improves the activation efficiency of PMS and the generation of active oxygen species, and has the multifunctional characteristics of photoelectrocatalysis and PMS activation. The PMS / PMS composite material is prepared into a photo-anode, the photo-anode is applied to a photoelectrocatalysis-PMS coupling system, under low voltage, PMS is activated through photon-generated carriers to generate ROS, a multi-ROS synergistic oxidation path is formed, and efficient degradation and defluorination mineralization of PFASs are achieved. The system has excellent stability and environmental adaptability, and has a wide application prospect.

Systems and methods to detect a polynucleotide strand in a sample during the early stage of amplification cycles. A metal-insulator-metal (MIM) electrode unit with two metal electrodes separated by a dielectric layer may be utilized as a nanogap sensor. Primers for amplifying a target polynucleotide strand may be immobilized on the surface of the dielectric layer. Polymerases, nucleotides, templates and primers may be added to the sample. At least one type of nucleotide may be labeled with a redox label that may enhance electron transport through the nanogap via tunneling and / or diffusion-based redox cycles. Signals (e.g., voltage pulses) may be directed through each of the electrodes. Current values from each electrode may be measured to establish a baseline signal. Alterations in the baseline signal may indicate the presence of target polynucleotide strands. The time to detect an alteration in the baseline signal may facilitate quantification of target polynucleotide strands.

This invention discloses a redox system comprising a Fe-xW powder architecture fabricated to possess excellent resistance to degradation at high temperatures during redox cycling between oxidized and reduced states, wherein x represents a concentration (at%) of tungsten (W) in the powder architecture and is in a range of about 1-75 at%, wherein the powder architecture comprises powder bed, powder suspension, foams, fibers, and / or printed microlattices.

Systems and methods for detecting polynucleotide strands in a sample during an early stage of an amplification cycle. A metal-insulator-metal (MIM) electrode unit having two metal electrodes separated by a dielectric layer may be used as a nanogap sensor. Primers for amplifying a target polynucleotide strand may be immobilized on the surface of the dielectric layer. Polymerase enzymes, nucleotides, templates, and primers may be added to a sample. At least one type of nucleotide may be labeled with a redox label that may enhance the transport of electrons through the nanogap via a tunnel and / or diffusion-based redox cycle. A signal (e.g., a voltage pulse) may be directed through each electrode. A current value from each electrode may be measured to establish a baseline signal. A change in the baseline signal may indicate the presence of a target polynucleotide strand. The time to detect the change in the baseline signal may facilitate the quantification of the target polynucleotide strand.

The invention discloses a clean combustion method of biomass fuel, which is characterized in that a Ni-Co-Ce-Zn-O / Al2O3 quaternary gradient structured catalyst is designed and prepared for the first time, and abundant oxygen vacancies and redox cycle networks are constructed through multi-metal component atomic-scale compounding; a'porous carrier-active layer-surface modification layer 'gradient configuration is adopted, and catalytic activity, adhesive strength and inactivation resistance are synergistically regulated and controlled on a nano-micron scale. A special sol-gel and segmented coating process is combined, the catalyst forms a uniform and firm active coating with a high specific surface area on the surface of the metal wire mesh cage, and excellent structural stability and catalytic durability are still kept under the conditions of high temperature, vibration and electric field-sound field coupling. According to the catalyst system, the soot ignition activity and the low-temperature conversion efficiency of CO and nitrogen oxide are remarkably improved, intrinsic synergy with an electric field and a sound field is achieved through the dielectric property and the surface dynamic response behavior of the catalyst system, and a catalysis-electricity-sound ternary coupling enhanced reaction microenvironment is formed.

The invention relates to the technical field of ethylbenzene dehydrogenation, in particular to a preparation method and application of a spinel CoFe2O4 oxygen carrier, and the preparation method comprises the following steps: dissolving cobalt salt and iron salt in water according to a specific molar ratio, adding ethylene glycol, methanol and a polymethyl methacrylate template agent, uniformly mixing, drying, carrying out programmed temperature rise calcination in an oxygen-containing atmosphere, and calcining to obtain the spinel CoFe2O4 oxygen carrier. The CoFe2O4 oxygen carrier with a single spinel crystal structure is obtained. The oxygen carrier is used as a recyclable lattice oxygen source and can catalyze ethylbenzene oxidative dehydrogenation to generate styrene at the ultralow temperature of 200-400 DEG C, especially about 250 DEG C, both the ethylbenzene conversion rate and the styrene selectivity can reach 96% or above, and the performance degradation rate is smaller than 5% after at least 41 times of redox cycles. The process conditions are mild, the oxygen carrier structure is stable, the activity is high, and a new way is provided for energy-saving and low-carbon production of styrene.

The invention discloses a preparation method and application of Y2O3-Co (OH) 2 particles, and belongs to the technical field of material preparation. The preparation method of the Y2O3-Co (OH) 2 particles comprises the following steps: mixing L-type amino acid containing amino and carboxyl functional groups with metal yttrium salt, carrying out microwave radiation heating reaction to obtain a deep eutectic solvent (y-DES), sequentially adding metal cobalt salt and an alkaline solution into the y-DES, continuously carrying out microwave radiation heating reaction until the metal cobalt salt and the alkaline solution are dissolved to obtain a brown mixed solution, and drying the brown mixed solution to obtain the Y2O3-Co (OH) 2 particles. And carrying out solid-liquid separation on the brown mixed solution after the reaction is completed, washing the precipitate, and drying to obtain Y2O3-Co (OH) 2 particles. According to the preparation method, the morphology of the Y2O3-Co (OH) 2 particles can be accurately regulated and controlled, the preparation process is simple, and an organic solvent does not need to be additionally added; the catalytic activity and the anti-interference capability are remarkably enhanced by constructing an efficient oxidation-reduction circulating system, and efficient determination of the organophosphorus pesticide in the acetylcholin esterase and inhibitor industrial wastewater is realized.

The invention discloses a method for activating persulfate catalytic oxidation organic matters by using catechol / ethylenediamine modified non-woven fabric. The preparation method comprises the following steps: firstly, dissolving catechol, ammonium persulfate and ethylenediamine in deionized water to prepare a deposition solution; placing the cleaned polypropylene non-woven fabric in the deposition liquid for constant-temperature magnetic stirring reaction, and drying to obtain the catechol / ethylenediamine modified non-woven fabric. The cross-linking polymerization reaction of catechol is accelerated by using ammonium persulfate, and the loading capacity and the stability of a polymerization layer are improved through ethidene diamine. According to the method, functional groups such as phenolic groups on the surface of the catechol / ethylenediamine modified non-woven fabric are used for complexing and reducing iron ions, and then persulfate is activated to degrade organic matters, so that the redox cycle of Fe < 3 + > / Fe < 2 + > in a system is promoted, the activation efficiency of the persulfate is enhanced, the free radical quenching phenomenon is avoided, and the service life of the non-woven fabric is prolonged. The removal effect of the organic pollutants is improved; meanwhile, the secondary pollution condition is reduced.

The present invention relates to a low-valent metal-doped cobalt spinel catalyst, and a preparation method and application thereof. The catalyst is a cobalt spinel active carrier doped with metal ions; the doped metal ions are low-valent metals; the cobalt spinel active carrier comprises a cobalt-based oxide having a spinel structure; and the structure of the catalyst is an interconnected multi-level pore structure. The beneficial effects of the present invention are as follows: the metal ions of the low-valent metal ion-doped cobalt spinel catalyst designed by the present invention are highly dispersed and evenly distributed. The low-valent doped metal ions and cobalt ions act synergistically to jointly promote electron transfer and redox cycles; at the same time, the surface synergistic oxygen vacancy concentration and the stability of oxygen vacancies are increased, thereby promoting the catalyst's ability to catalyze the oxidation of VOCs, and having certain application value.

The invention relates to the field of ammonia gas sensors, in particular to a sensitive material, a preparation method of the sensitive material, application of the sensitive material as an ammonia gas sensor sensitive material and an ammonia gas sensor. On one hand, the sensitive material provided by the invention is based on the characteristic of high temperature resistance of a CeCoO3 perovskite material; on the other hand, the catalytic activity is enhanced based on the combination of the redox cycle of Ce < 3 + > / Ce < 4 + > and the electron transfer ability of Ag, the cerium-based material has oxygen vacancy defects to provide abundant reaction sites for catalytic reaction, and cerium has better thermal stability; in addition, the electron transfer efficiency in the sensitive material is improved on the basis of replacing cerium in crystal lattices with part of silver. Tests show that a sensor made of the sensitive material provided by the invention can complete ammonia concentration detection work at about 650 DEG C, has high anti-interference ability to NO and NO2, and is suitable for being applied to a high-temperature ammonia sensor for detecting ammonia concentration in an automobile exhaust treatment system.

The invention discloses a precious metal continuous recovery method based on photochemical regenerated polyphenol interface composite aerogel, and belongs to the field of precious metal ion adsorption-reduction and recovery. The preparation method comprises the following steps: preparing aerogel with photoelectrochemical activity, depositing a metal polyphenol network coating on an aerogel skeleton by taking the aerogel as a substrate to obtain polyphenol interface composite aerogel, and introducing a phenol-quinone structure group capable of generating redox cycle conversion to obtain the polyphenol interface composite aerogel. And continuous adsorption-reduction of precious metal ions is realized through light-driven electron transfer and proton coupling oxidation-reduction cycle so as to recover precious metal. The prepared polyphenol interface composite aerogel material can realize multiple adsorption cycles of noble metal ions, shows ultrahigh adsorption capacity, and has wide applicability to various noble metals such as gold, silver, platinum, palladium and the like.

This invention belongs to the field of environmental material preparation technology and application, and discloses a method for preparing Co-N / C@CeO2 composite materials and a method for thermally activating a PMS system to degrade plastics. Firstly, CeO2 microspheres are prepared by hydrothermal and calcination methods. Subsequently, a Co-N / C@CeO2 composite catalyst is prepared using in-situ growth and calcination methods. Under thermal effects, the Co-N / C@CeO2 composite material helps promote the degradation of HSO5. ‑ Efficient activation of molecules, and in Co and Ce(M n / M n+1 A large amount of O2 was generated under the synergistic effect of the multivalent redox cycle. ‑ ·OH and SO4 ·‑ Active free radicals and 1 O2 is a non-radical active species. Under optimal conditions of 55℃, the degradation rate of PET microplastics reached 52.3%. Furthermore, the study found that adding a small amount of H2O2 to the thermally activated PMS synergistic system further improved the degradation activity of PET microplastics to 92.3%, exhibiting excellent degradation activity. This invention achieves the goal of efficiently degrading PET microplastics in a thermally activated PMS system using Co-N / C@CeO2 composite materials.

The invention relates to the technical field of propane catalytic oxidation, in particular to a silicon-based heterojunction material and a preparation method and application thereof based on mechanical force, the preparation method comprises the following steps: mixing copper oxide, silicon powder, titanium dioxide and water, grinding, and freeze-drying to obtain ground powder; and calcining the ground powder in a protective atmosphere to obtain the silicon-based heterojunction material. According to the invention, the silicon-mediated CuO-TiO2 nano heterojunction is constructed through a mechanical force assembly strategy. And nanocrystallization, uniform mixing and interface engineering of CuO and TiO2 are synchronously realized under the action of liquid phase shearing. In the process, the silicon powder not only serves as a doping agent, but also serves as a solid reducing agent, and selectively reduces Cu < 2 + > on the surface into Cu < + > under the driving of shearing force, so that an active structure with a Cu < + > / Cu < 2 + > redox cycle is constructed in situ, lattice distortion is induced, a large number of oxygen vacancies are generated, and the migration and activation capacity of oxygen is improved.

The invention relates to a preparation method and application of a core-shell catalyst for oxidizing CO and reducing NO at low temperature, and belongs to the technical field of flue gas purification. According to the core-shell catalyst, coconut shell activated carbon CSAC serves as a core, the outer side of the CSAC is coated with active components CeO2 and CoO to form a shell structure, the total mass of Ce and Co in the active components accounts for 2%-4% of that of the CSAC, and the molar weight of Co accounts for 80%-90% by taking the total molar weight of Co and Ce as 100%. The CSAC catalyst is coated with Co and Ce step by step or at the same time through acetic acid activation pretreatment, step-by-step impregnation or co-impregnation, microwave pyrolysis activation and plasma surface treatment, and CO and NO are synchronously removed under low-temperature activation of water vapor. According to the core-shell catalyst, CSAC is used as a physical support and reactant enrichment platform, a Co layer is used for leading redox cycle, a Ce layer is used for regulating oxygen species migration, Co and Ce reaction sites are used for constructing a bifunctional catalyst, coupling of two reactions of CO catalytic oxidation and NO catalytic reduction is achieved, CO and NO are efficiently removed at the same time, and the core-shell catalyst is environmentally friendly and free of pollution.

This application relates to the field of wastewater treatment technology, and discloses a method for preparing porous ceramic-supported sulfur-based composite packing and its application in wastewater denitrification and phosphorus removal. Using porous ceramic as a carrier, a gradient filling process is employed to load active components in layers. The inner layer of siderite composite gel and calcite composite dynamically neutralizes the H+ generated by sulfur autotrophy. + pH buffering is achieved through reversible proton exchange of sulfonic acid groups; the middle-layer pyrite composite gel enhances compressive strength through C-O-Fe bonding, and the polypyrrole-coated hybrid gel constructs a π-π conjugated electron pathway, accelerating electron transfer and releasing Fe. 2+ Phosphate is precipitated; the outer layer of sulfur-biochar forms nano-sulfur crystals, rapidly initiating denitrification due to its high specific surface area. Sulfur consumption and sulfate accumulation are reduced through a sulfur-iron redox cycle. This packing material achieves highly efficient nitrogen and phosphorus removal from wastewater without the need for external carbon sources or pH adjusters.

The invention relates to the technical field of waste battery recovery, and discloses a waste lithium ion battery recovery method based on manganese redox cycle, which comprises the following steps: S1, placing a pole piece of a waste lithium battery in a system containing hydrogen peroxide and organic weak acid, uniformly mixing, adding a manganese-based catalyst, and dissolving to obtain a homogeneous solution; wherein the manganese-based catalyst is prepared from one or more of Mn2O3 (manganese oxide), MnO2 (manganese dioxide), Mn3O4 (manganese oxide), Mn2O5 (manganese oxide) and LiMn2O4 (lithium manganese oxide); s2, adding a precipitant to precipitate metal ions in the homogeneous solution to obtain a first precipitation product; by adding the high-valence manganese-based catalyst, generation of more strong oxidizing free radicals in the reaction is realized, and compared with the traditional manganese-based Fenton-like reaction, the reaction rate is accelerated, so that efficient and green recovery of active substances and current collectors in the positive and negative electrodes of the battery under low energy consumption is effectively realized.

This invention discloses a Fe2O3-MoO3-CaO oxygen carrier, its preparation method, and its application, belonging to the field of oxygen carrier technology. The technical solution includes the following steps: 1) Preparation of Fe2O3: NaOH solution is slowly added to FeCl3 solution while stirring for 3-5 hours; then sodium dodecyl sulfate is added to the sol, and the above system is transferred to a high-pressure reactor for hydrothermal reaction and calcination to obtain Fe2O3 powder; 2) Preparation of Fe2O3-MoO3 composite material; 3) Preparation of Fe2O3-MoO3-CaO oxygen carrier. The oxygen carrier prepared by this invention has high hydrogen yield and high NH3 conversion rate, good cycle stability, stable crystal form, and maintains high activity after multiple redox cycles, meeting the requirements for industrial recycling.

The application discloses a synthesis method of a D-A type multi-ary conjugated small molecule based on ferrocene, and comprises the following steps: taking a ferrocene-based compound and a bromophenyl compound as raw materials, taking a palladium complex as a catalyst, and performing a heating reaction in an organic solvent; after the reaction is completed, an intermediate is prepared through extraction, column chromatography and recrystallization; taking the obtained intermediate and a 4-pyridine boronic acid compound as raw materials, taking a palladium complex as a catalyst, and performing a heating reaction in an organic solvent; after the reaction is completed, a D-A type multi-ary conjugated small molecule is prepared through cooling, extraction, column chromatography and recrystallization. The application further discloses a sandwich structure memory device and applies the sandwich structure memory device to super-high-density information storage. The small molecule material prepared by the application can not only realize ternary information storage performance, but also greatly improve the stability of the device through the stable redox cycle of the ferrocene group, thereby realizing long-time stable super-high-density information storage.