118 results about "Nitrogen doped" patented technology

The invention discloses a high-entropy alloy / nitrogen-doped carbon nano catalytic material and a preparation method and application thereof.The nano catalytic material comprises a high-entropy alloy composed of five non-noble metals including Fe, Co, Ni, Cu and Mn and nitrogen-doped carbon synthesized with the assistance of MOF, the non-noble metal high-entropy alloy serves as a main body material, the nitrogen-doped carbon serves as a carrier material, and the nitrogen-doped carbon serves as a carrier material. A non-noble metal high-entropy alloy is loaded on nitrogen-doped carbon to construct a novel nano catalytic material, and the novel nano catalytic material is used for activating peroxydisulfate to remove antibiotics in a water body. The catalyst has the advantages of excellent chemical stability, good reusability and the like and is a novel nano catalytic material with efficient catalytic performance and environment-friendly characteristics, and the preparation method has the advantages of being simple in operation process, green, environmentally friendly, economical, feasible and the like and can be used for large-scale preparation.

The invention discloses a preparation method and application of a high-nitrogen-doped ordered mesoporous carbon supported copper catalyst, and belongs to the technical field of catalyst preparation. The preparation method comprises the following steps: by taking cane sugar and a copper-nitrogen complex as raw materials, SBA-15 as a template agent and sulfuric acid as a catalyst, carrying out equivalent-volume impregnation, low-temperature heat treatment, 800-900 DEG C high-temperature carbonization and nitric acid / hydrofluoric acid demolding to prepare pyrrole nitrogen enriched or pyridine nitrogen enriched high-nitrogen doped ordered mesoporous carbon with a large specific surface area; the preparation method comprises the following steps: loading a copper species on high-nitrogen-doped ordered mesoporous carbon by adopting an equivalent-volume impregnation method, and reducing at 350-400 DEG C to prepare the high-nitrogen-doped ordered mesoporous carbon loaded copper catalyst. The prepared catalyst is high in nitrogen content, large in specific surface area, high in pyridine nitrogen or pyrrole nitrogen enrichment degree and uniform in copper particle dispersion and shows efficient catalytic performance in methanol oxidative carbonylation reaction, and the highest methanol conversion rate is 9.3%.

The invention discloses a nitrogen-doped carbon dot material with a high emulsification level and a preparation method thereof, and belongs to the technical field of two-dimensional interface materials. The method comprises the following steps: firstly, adding a NaOH aqueous solution into an acetaldehyde aqueous solution, then adding hydrochloric acid to adjust the pH value of the solution to be neutral, stirring for reaction, then centrifuging to retain precipitate, extracting with liquid nitrogen, and freeze-drying to obtain a carbon dot material; and adding the carbon dot material into a system of potassium methoxide and a nitrogen source, carrying out heating reaction, carrying out centrifugation, retaining the precipitate, drying, and preparing the nitrogen-doped carbon dot material with a high emulsification level by controlling the reaction time, regulating the acid amount and changing the nitrogen source. A large amount of nanoscale nitrogen-doped carbon dot material emulsifiers with an amphiphilic emulsification effect can be rapidly synthesized under mild reaction conditions, the obtained nitrogen-doped carbon dot material is uniform in size and high in dispersity, the emulsification requirements under different oil phase conditions can be met, the preparation process is simple, dialysis and centrifugation are not needed in industrial production, and the method is suitable for industrial production. And the nitrogen-doped carbon dot material with a high emulsification level can be prepared only through centrifugation and drying.

The invention provides a preparation method of a gate oxide layer and a gate, and the method comprises the steps: carrying out the rapid thermal annealing treatment of a silicon-based substrate in a nitrogen-containing gas atmosphere, which belongs to a non-destructive nitrogen doping mode, and carrying out the nitrogen pre-doping on the surface of the silicon-based substrate, so as to reduce the doping amount needed by the subsequent plasma nitrogen doping; therefore, the damage of the plasma nitrogen doping process to the SiON gate oxide layer is reduced, and the interface defect between the SiON gate oxide layer and the silicon-based substrate interface is reduced. Besides, after the nitrogen pre-doped layer is formed, the thermal oxidation process is carried out on the silicon-based substrate to form the silicon dioxide gate oxide layer, so that the damage to the SiON gate oxide layer film is reduced, and the interface defect between the SiON gate oxide layer and the silicon-based substrate interface is further reduced; moreover, the laser rapid annealing treatment can remove the intrinsic oxide layer on the surface of the SiON gate oxide layer, repair the damage to the crystal lattice of the SiON gate oxide layer caused by the plasma nitrogen doping treatment process, improve the film quality and repair the interface.

The invention provides micron-sized diamond particles with NV color centers and a preparation method and application of the micron-sized diamond particles with the NV color centers. The preparation method comprises the following steps that cleaned diamond seed crystals are placed in a microwave chemical vapor deposition chamber, CH4, H2 and N2 are introduced, and nitrogen-doped monocrystal diamond grows; the nitrogen-doped single crystal diamond is sequentially subjected to electron irradiation and vacuum annealing treatment, and the single crystal diamond with the NV color center is obtained; and the single crystal diamond with the NV color center is polished, cut and annealed, and the micron-sized diamond particles with the NV color center are obtained. The prepared micron-sized diamond particles are high in NV color center concentration and can be used for preparing a magnetic detection probe.

The present invention discloses a biphasic Nitrogen doped sodiophilic anode. The present disclosure also provides a process of preparing a defect rich Nitrogen doped waste polymer derived carbon (PDC) and commercial polyvinyl based polymer derived carbon (PRC) as carbon precursor for use in sodium ion / metal battery with high capacity, long cyclic stability in both half cell and full cell.

The invention relates to the technical field of acid tail gas treatment, and discloses a boron-nitrogen-doped aluminum oxide catalyst as well as a preparation method and application thereof. The method comprises the following steps: (1) mixing an aluminum source, a nitrogen source, a boron source and water to obtain a mixed solution, then adding a peptizing agent to adjust the pH of the mixed solution to be acidic, and then standing and aging; (2) drying the material subjected to standing and aging in the step (1), then roasting under protective gas, and then sequentially carrying out high-temperature nitriding and cooling; and (3) carrying out plasma treatment on the material cooled in the step (2). The catalyst prepared by the method has large specific surface area and catalytic activity, can well capture water and carbonyl sulfide, converts carbonyl sulfide into hydrogen sulfide and improves the purity and yield of enriched hydrogen sulfide, and the preparation method of the catalyst is simple and efficient.

The present application relates to a kind of for metallurgical coal gas to remove organic sulfur nitrogen-doped catalyst and its preparation method and application, including the following steps: with soluble aluminum salt as carrier, it is prepared with certain proportion of nitrogen source compound mixed solution, then precipitate completely in alkaline environment, after stirring, aging, drying treatment, with high temperature calcination nitrogen-doped Al2O3 catalyst is obtained.The catalyst has more nitrogen site, stronger nitrogen doping capacity, so that the basic center of catalyst increases, improves the catalytic activity when catalytic elimination carbonyl sulfur, while reducing the adsorption of H2S, improves H2S yield, reduces the formation of sulfur, ensures the activity and stability of catalyst, prolongs the life of catalyst.

The present invention relates to the technical field of nanopowder preparation, and discloses a method for preparing a nitrogen-doped biochar-loaded iron nitride composite material. The process is as follows: (1) potassium ferrate, urea, and waste tea powder are ground and mixed in proportion to obtain a first mixture; (2) the first mixture is reacted in a temperature range of 50-70°C to obtain a second mixture; (3) the second mixture is reacted in a temperature range of 600-800°C for 1-3 hours, and then cooled to room temperature to obtain a third mixture; (4) the third mixture is washed and dried to obtain a nitrogen-doped biochar-loaded iron nitride composite material. Compared with the existing preparation process, the beneficial effect of the present invention is that the operation steps only include grinding, stirring, heating, etc., the operation is simpler, the overall process only involves one pyrolysis, the energy consumption is lower, and the toxic gas ammonia is not used, and the operation is safer. The material can degrade trichloroethylene without an anaerobic environment and can be used for the remediation of organochlorine-contaminated groundwater environment.

This invention discloses a two-step method for preparing nitrogen-doped three-dimensional network phenolic resin-based composite carbon materials and their applications. The method uses an alkaline environment provided by ammonia to induce addition condensation polymerization of phenol and formaldehyde to obtain a preliminary nitrogen-doped phenolic resin. This resin is then mixed with melamine resin to achieve a second step of nitrogen introduction, and after being composited with sodium alginate, it is cross-linked with CaCl2 to obtain a three-dimensional hydrogel precursor. After carbonization and activation treatment, a nitrogen-doped porous carbon material is obtained. This material possesses both micro- and mesoporous synergy and multiple types of nitrogen functional sites, exhibiting high specific surface area capacitance and excellent cycling stability in supercapacitors. Compared with existing schemes that only use NaOH without introducing dual-source nitrogen doping (such as CN119724955A), this invention achieves synergistic optimization of structure, chemical sites, and transport through ammonia pre-doping, secondary nitrogen doping with melamine resin, and a ternary interpenetrating network. The process is simple, uses inexpensive raw materials, and is suitable for large-scale production.

The present invention belongs to the technical field of anode-free sodium metal batteries, and specifically discloses a modified current collector for anode-free sodium batteries, a preparation method thereof, and an application thereof. The preparation method of the present invention is as follows: on the basis of preparing polypyrrole, by adding a transition metal salt, the nitrogen doping type in polypyrrole-derived nitrogen-doped nanocarbon particles is regulated. The modified current collector for anode-free sodium batteries prepared by the present invention has a high relative content of N-6 and N-5 type doped nitrogen, thereby improving the sodium affinity of the nitrogen-doped coating, reducing the nucleation point of sodium metal, and improving the reversibility of the sodium deposition / stripping reaction, thereby improving the electrochemical performance of the cathode-free sodium battery.

The invention discloses a preparation method and application of a cobalt-nitrogen-doped mesoporous carbon catalyst, and belongs to the technical field of catalyst preparation, and the preparation method comprises the following steps: mixing and grinding glucose and an SBA-15 mesoporous molecular sieve, pyrolyzing in a nitrogen atmosphere, soaking the obtained product in hydrofluoric acid to remove an SBA-15 template, alternately centrifuging with water and ethanol to obtain a precipitate, and drying to obtain the cobalt-nitrogen-doped mesoporous carbon catalyst. Mesoporous carbon is obtained; the preparation method comprises the following steps: respectively dissolving phenanthroline and cobalt chloride hexahydrate in ethanol, and mixing to form a Co-phen solution; and soaking the obtained mesoporous carbon in a Co-phen solution, evaporating the solvent after soaking, grinding into powder, and carrying out heat treatment in a nitrogen atmosphere to obtain the cobalt-nitrogen doped mesoporous carbon catalyst. The cobalt-nitrogen-doped mesoporous carbon catalyst shows excellent oxygen reduction catalytic activity under the alkaline condition, the half-wave potential reaches 0.873 V and is close to a 4-electron transfer path, and the stability and methanol tolerance are superior to those of a commercial Pt / C catalyst.

The present application relates to the technical field of carbon nanotubes and provides nitrogen-doped carbon nanotubes and a preparation method thereof, wherein the preparation method of the nitrogen-doped carbon nanotubes comprises the following steps: providing a lamellar catalyst with a metal carrier; reducing and activating the lamellar catalyst to obtain an activated catalyst; introducing an atmosphere of a carbon source and a nitrogen source into the activated catalyst to react and obtain nitrogen-doped carbon nanotubes. The preparation method of the present application provides a lamellar catalyst with a metal carrier, wherein the catalytically active component (metal) of the lamellar catalyst has a strong adsorption capacity on the carrier and an ion exchange capacity with the carrier, making it easier for the catalytically active component elements to enter the mesopores and micropores on the inner surface of the lamellar carrier material, better utilizing the surface area of ​​the carrier, achieving uniform dispersion of the catalytically active elements, and improving the loading amount and uniformity of the lamellar catalyst with the metal carrier; the preparation method is suitable for fluidized bed production processes and can be used for industrial production.

The invention belongs to the field of environmental protection and air purification, and particularly relates to a nitrogen-doped titanium dioxide loaded copper nanoparticle photocatalyst as well as a preparation method and application thereof. The preparation method comprises the following steps: synthesizing an N-TiO2 carrier through a low-temperature hydrolysis method, and loading Cu NPs on the N-TiO2 carrier through a wet impregnation method to prepare the Cu / N-TiO2 catalyst. The Cu / N-TiO2 photocatalyst obtained by the invention can effectively catalyze and remove NO and CO under the conditions of 120-210 DEG C and visible light, and has good stability and NH3 selectivity. Compared with an N-TiO2 carrier, the performance of removing NO and CO through photocatalysis and the NH3 selectivity are obviously improved. The high-cost limitation of a traditional noble metal catalyst is broken through, an innovative solution is provided for low-temperature photo-thermal synergistic purification of motor vehicle exhaust, and application and popularization are facilitated.

Nitrogen doping an insulating layer can lower the bandgap of a magnetic storage device. It is challenging to nitrogen dope magnesium oxide (MgO). A cation can be added to allow the magnesium to hold onto the nitrogen dopant without highly oxidizing or nitriding the cation. The resulting nitrogen doped MgXO, where X is the cation, has a lower bandgap compared to a much similar barrier layer that has neither nitrogen nor a cation thus improving thermal and electrical reliabilities. The nitrogen doped MgXO is non-stoichiometric whereas comparably, an oxynitride is stoichiometric. Example cations that may be used include aluminum, titanium, vanadium, chromium, and scandium.

The invention provides a boron-nitrogen doped resin coated graphite material and a preparation method thereof, a battery negative electrode and a lithium ion battery, and the method comprises the following steps: mixing graphite and a boron doping agent, and presintering to obtain boron-doped graphite; mixing the boron-doped graphite with resin and a nitrogen doping agent to obtain composite particles, and then roasting the composite particles to obtain the boron-nitrogen-doped resin coated graphite material, the mass ratio of the graphite to the boron doping agent is 10: (0.1-2), and the mass ratio of the boron-doped graphite to the nitrogen doping agent to the resin is 10: (0.1-2): (0.1-2). The graphite-resin material with a core-shell structure is prepared by performing boron doping on the graphite material and then coating the resin doped with the nitrogen element, the loss of the graphite material caused by lithium intercalation and deintercalation is effectively inhibited by the structure, the cycle life of the material is prolonged, meanwhile, the strength of the material is also improved by boron doping, and the service life of the material is prolonged. And the cycle life and the capacity of the material are greatly improved.

This application applies to the field of new energy materials technology, providing hard carbon anode materials and their preparation methods, nitrogen-containing asphalt coatings, and sodium-ion batteries. The method includes: nitrogen-doping asphalt to obtain nitrogen-containing asphalt coatings; uniformly mixing pre-carbonized biomass powder with the nitrogen-containing asphalt coatings; and sintering the resulting mixed powder to obtain the hard carbon anode material. By doping the asphalt with nitrogen, the asphalt exhibits a larger carbon interlayer spacing after high-temperature sintering, providing sodium storage sites and facilitating rapid sodium ion migration. This improves the material's initial charge-discharge efficiency and hydrophobicity without affecting specific capacity and rate performance. Furthermore, the pre-carbonization of biomass allows for the uniform adsorption of small coating particles onto the main material. The highly graphitized coating layer formed during high-temperature sintering exhibits stronger hydrophobicity and fewer defect sites, transforming the open-pore structure into a closed-pore structure, thereby improving its initial charge-discharge efficiency, specific capacity, and cycle performance as a sodium battery anode.

The invention discloses nitrogen and phosphorus doped activated carbon loaded zero-valent iron, a preparation method thereof and an antibiotic-containing wastewater treatment method. The preparation method of the nitrogen and phosphorus doped activated carbon loaded zero-valent iron comprises the following steps: step a, treating activated carbon with hydrochloric acid to obtain activated carbon powder; step b, adding activated carbon powder into a K3PO4 solution, performing ultrasonic treatment to obtain activated carbon impregnated with K3PO4, heating the activated carbon impregnated with K3PO4 to obtain phosphorus-doped activated carbon, impregnating the phosphorus-doped activated carbon into an ammonia water solution, heating, stirring and standing to obtain nitrogen-phosphorus-doped activated carbon; and step c, adding the phosphorus-nitrogen doped activated carbon and polyethylene glycol into the FeSO4. 7H2O solution, and dropwise adding sodium borohydride to obtain the nitrogen-doped activated carbon loaded zero-valent iron powder. Nitrogen and phosphorus doped activated carbon loaded zero-valent iron adopted by the invention generates potential difference between low-valence zero-valent iron and high-valence activated carbon in a substrate with a large amount of electrolyte to form a primary battery, and generated electrons, [H] with strong oxidizing property and the like have a promoting effect on anaerobic digestion.

The invention discloses a bimetallic nitrogen-doped catalyst as well as a preparation method and application thereof. The bimetallic nitrogen-doped catalyst comprises a carrier and a bimetallic component loaded on the carrier, the carrier is an MCM-41 molecular sieve; the bimetallic component comprises precious metal elements and non-precious metal elements; doped nitrogen in the bimetallic nitrogen-doped catalyst is obtained by roasting a nitrogen-containing compound raw material. The active bimetallic particle size of the catalyst used in the method is small and stable, the catalyst interacts with a nitrogen-containing substance and a carrier, glycollic acid can be subjected to reductive amination to prepare glycine, and the catalyst is easy to separate and has excellent cycle stability. The application potential of the method and the catalyst is great, and wide prospects are brought to various fields in the future.

The invention discloses a preparation method and application of a single-atom cobalt polymer mixed nitrogen-doped carbon electrocatalyst; the preparation method is as follows: 1. Dissolve dicyanobenzene, tetracyanobenzene and cobalt chloride in a mixed solution of N, N-dimethylformamide and ethylene glycol, fully mix, add a catalyst and stir until fully mixed, and then perform a hydrothermal reaction. 2. Add the solid phase product obtained in step 1 and nitrogen-doped multi-walled carbon nanotubes to a mixed solution of ethanol and nafion solution and fully mix to obtain a carbon paper coating catalyst. 3. The obtained carbon paper coating catalyst is drop-coated on an electrode substrate to obtain an electrocatalyst. The present invention polymerizes 1,2,4,5-tetracyanobenzene and 1,4-dicyanobenzene under the catalysis of 1,8-diazabicyclo[5.4.0]undec-7-ene to form a hole defect, thereby causing the overall charge of the carbon skeleton to be rearranged, so that the active center of the catalyst is increased.

The application discloses a kind of adsorbents for noble metal recovery and preparation method thereof, further provide a kind to be used in the noble metal recovery method of the catalyst, wherein the adsorbents for noble metal recovery includes nitrogen-doped graphene-SiO2 Hybrid Material, the nitrogen-doped graphene-SiO2 Hybrid Material includes graphene-SiO2 Hybrid Material and nitrogen doped therein, wherein the molar amount of nitrogen in the nitrogen-doped graphene-SiO2 Hybrid Material and the total molar amount of C and Si are 1: (55-10050) ratio. The noble metal recovery adsorbent of the application can effectively recover noble metal Au in wastewater, has strong noble metal recovery adsorption capacity, high recovery rate, especially for the catalyst washing produced in the preparation process of vinyl acetate catalyst containing lower content of noble metal element Au has higher noble metal recovery adsorption capacity.

The invention discloses a tubular confinement structure CoFe diatomic nitrogen-doped carbon-based catalyst for removing new pollutant wastewater and a preparation method. A transition metal diatomic nitrogen-doped carbon-based catalyst with a tubular nano confinement structure is generated in situ through simple high-temperature calcination. The prepared CoFe-CNT / PANI catalyst has a large specific surface area and a tubular nano confinement structure, the specific surface area can reach 200-300 m < 2 > / g, the size of the tubular structure is about 5-10 [mu] m, and the thickness of the tube wall is 3-5 nm. The synergistic effect of the transition metal diatomic active sites and the tubular nano confinement structure can effectively improve the generation and utilization efficiency of active species, promote mass transfer and enhance stability. By constructing a CoFe-CNT / PANI electro-catalysis system, more than 94% of new pollutants such as ibuprofen and the like can be efficiently removed within 60 minutes. The operation steps are simple, the cost is low, the problems that a traditional catalyst is low in activity, slow in reaction mass transfer, low in utilization rate and the like are solved, and an efficient, rapid and stable technical scheme is provided for treatment of new pollutant wastewater in the technical field of electrochemistry and environmental remediation.

The invention discloses a boron and nitrogen-doped carbon-loaded copper catalyst and a preparation method and application thereof.The preparation method comprises the steps that excessive concentrated nitric acid is used for treating carbon, the treated carbon and copper nitrate are soaked at the room temperature, then an obtained precursor, a nitrogen source and a boron source are ground into powder at the room temperature, roasting is conducted at the specific temperature and time, and the boron and nitrogen-doped carbon-loaded copper catalyst is obtained. The boron and nitrogen doped carbon loaded copper catalyst is obtained. The catalyst disclosed by the invention can be applied to preparation of oxygen-containing products by electrocatalytic reduction of carbon dioxide. A stronger metal-carbon carrier interaction is induced mainly through B and N co-doped carbon, the average valence state of copper is improved, and a * CO-CO coupling way is promoted; as B has a relatively strong oxyphilic characteristic, an oxygen-containing intermediate in the reaction process is effectively stabilized, and breakage of a C-O bond is inhibited, so that high-activity and high-selectivity generation of an oxygen-containing product ethanol is promoted. And the catalyst shows excellent performance of preparing ethanol by reducing carbon dioxide in the process of preparing ethanol by reducing carbon dioxide.

The application discloses a polypyrrone-derived carbon-coated metal catalyst and a preparation and application thereof. The catalyst prepared by the application provides a nitrogen-doped carbon layer by polypyrrone, which not only provides protection for an active center, but also promotes electron transmission between carbon layers by the conductive property of the polypyrrone-derived carbon layer itself. The polypyrrone-derived carbon-coated metal catalyst is applied to a catalytic hydrogenation reaction of chloronitrobenzene containing sulfur-containing poisons, and shows excellent activity, selectivity and stability.

The invention provides a composite hard carbon negative electrode material, a preparation method thereof and a battery, and the preparation method comprises the following steps: mixing asphalt and ion exchange resin to obtain a first precursor; performing carbonization treatment on the first precursor to obtain a second precursor; performing nitrogen doping treatment on the second precursor to obtain a third precursor; and performing plasma treatment on the third precursor to obtain the composite hard carbon negative electrode material, the battery comprises the composite hard carbon negative electrode material obtained by the method. The contradiction between the raw material cost and the performance consistency in the prior art is solved, the problem of balance between electronic conductivity and ion transmission is solved, and the problems that dead holes or closed holes exist in the surface of a traditional hard carbon material and cannot be effectively infiltrated by electrolyte, and the contact resistance is large due to particle aggregation are solved.

The application discloses a boron and nitrogen doped carbon loaded copper catalyst and a preparation method and application thereof. The catalyst is prepared by the following steps: treating carbon with excessive concentrated nitric acid, impregnating the treated carbon and copper nitrate at room temperature, grinding the obtained precursor and a nitrogen source and a boron source into powder at room temperature, and calcining the powder at a specific temperature and for a specific time. The catalyst can be applied to electrocatalytic reduction of carbon dioxide to oxygen-containing products. The catalyst mainly induces stronger metal-carbon support interaction by B and N co-doped carbon, improves the average valence state of copper to promote the CO-CO coupling route, effectively stabilizes oxygen-containing intermediates in the reaction process due to the relatively strong oxygen affinity of B, and inhibits the breaking of C-O bonds, so that high activity and high selectivity of ethanol are realized. The catalyst has excellent performance in the reduction of carbon dioxide to ethanol.

Embodiments of the present disclosure generally relate to methods of producing carbon-nitrogen allotrope nanomaterials. More specifically, the methods of the present disclosure utilize nitrogen-containing compounds as a feedstock for nitrogen doped carbon nanomaterial production. In some embodiments, a method for forming carbon-nitrogen nanomaterials includes mixing a nitrogen-rich feedstock, carbon-based feedstock, and a catalyst to form a feed solution. The method further includes injecting the feed solution into a carrier gas stream and into a heated reaction vessel. The heated reaction vessel includes a first zone and a second zone. The method further includes heating the feed solution within the first zone at a first temperature. The method further includes heating the feed solution within the second zone at a second temperature to form the carbon-nitrogen nanomaterials. The method further includes removing the carbon-nitrogen nanomaterials from the heated reaction vessel.

The invention relates to the technical field of polyaryletherketone modification, in particular to a hydrophobic high-CTI (comparative tracking index) polyaryletherketone composite material which is formed by melting, blending and compounding a material A and a material B, the material A comprises polyaryletherketone and polyether acrylate fluoride; the material B is a graft of nitrogen-doped aluminum borate modified by an amino silane coupling agent and a glycidyl acrylate compound; the composite material has hydrophobicity, the CTI value is at least 340 V, the water absorption rate is low, and the composite material can be suitable for a high-humidity environment.

The invention relates to the technical field of adsorption materials, in particular to a nitrogen-doped four-metal MOFs (Metal-Organic Frameworks) derived carbon composite material and a preparation method thereof. The preparation method comprises the following steps: preparing the Fe-Co-Ce-Zr four-metal MOFs material; and preparation of the nitrogen doped Fe-Co-Ce-Zr four-metal MOFs-C material is carried out, and performing plasma treatment. The four-metal MOFs material is prepared from four metals and organic ligands through a one-step hydrothermal method, the material has a three-dimensional flower-shaped nano-microsphere structure, and the regular and ordered morphology provides a great specific surface area and a rich pore structure, so that more adsorption sites are provided for VOCs molecules, and the adsorption efficiency of VOCs is improved. The efficient adsorption on the low-concentration VOCs gas is greatly improved.

Semiconductor devices including a nitrogen-doped field release dielectric layer (130) are described. A microelectronic device (100) comprises: a substrate (103) comprising a body region (108) having a first conductivity type and a drain drift region (138) having a second conductivity type opposite the first conductivity type; a gate dielectric layer (150) on the substrate (103), the gate dielectric layer (150) extending over the body region (108) and the drain drift region (138); and a nitrogen doped field release dielectric layer (130) on the drain drift region (138).