185 results about "Graphitic carbon nitride" patented technology

The invention belongs to the technical field of medical treatment, and discloses a blood product virus inactivation system based on a synergistic effect of nano-catalysis photochemical inactivation and low-temperature plasma, the system comprises: a nano-photocatalysis inactivation module adopting titanium dioxide TiO2 and graphite phase carbon nitride g-C3N4 nano-materials as photocatalysts; the low-temperature plasma inactivation module adopts a low-temperature plasma generator to generate plasma cloud above the blood product and release active particles; the dynamic fluid stirring module is used for enabling the blood product to uniformly receive photocatalysis and plasma inactivation effects through a microfluid mixing technology so as to ensure the uniformity of virus inactivation; the sensing monitoring and intelligent feedback module is used for monitoring the residual quantity of viral nucleic acid and the activity of protein in the blood in real time by adopting a spectrum sensor and a biochemical sensor. The method can be widely applied to the fields of clinical blood transfusion, blood product manufacturing, blood disease treatment and the like, promotes the progress of a blood safety guarantee technology, reduces the virus infection risk and improves the patient safety.

There is disclosed a method of constructing a layered double hydroxide (LDH) material comprising selected metal ions, and employing metallic vanadium carbide (V2C) for promoting conductive properties of the LDH material, wherein the layered LDH material is a trimetallic LDH material. The trimetallic LDH material comprises selected Ni2+, Co2+, and A3+ metal ions with its cationic configuration for improving photocatalytic properties of the LDH material, wherein trimetallic nickel-cobalt-aluminium layered double hydroxide (NixCoyAlz LDH) and vanadium carbide MXene (V2C)-based composite is coupled with a graphitic carbon nitride (g-C3N4) nanosheet, to form a hybrid-junction photocatalyst. Also disclosed is a layered structure of vanadium carbide (V2C) MXenes, comprising trimetallic nickel-cobalt-aluminium layered double hydroxide (NixCoyAlz LDH) and vanadium carbide MXene (V2C) coupled with graphitic carbon nitride (g-C3N4), forming a NixCoyAlz LDH / g-C3N4 hybrid-junction photocatalyst.

The invention provides a monatomic cobalt-doped graphite phase carbon nitride modified carbon electrode and a preparation method and application thereof, and belongs to the technical field. The prepared monatomic cobalt-doped graphite phase carbon nitride modified carbon electrode comprises a carbon electrode substrate and a cobalt-doped graphite phase carbon nitride catalytic layer. The oxygen-containing functional group of the carbon electrode and monatomic cobalt synergistically regulate and control the selectivity and activity of two-electron oxygen reduction, so that hydrogen peroxide is efficiently and stably generated by electro-catalyzing oxygen. The carbon electrode is applied to an electro-catalytic ozonation technology, H2O2 generated in situ reacts with ozone to generate hydroxyl radicals (OH), and monatomic cobalt and carbon nitride can also directly act on the ozone to generate OH, so that removal of new pollutants difficult to degrade is remarkably enhanced, and a theoretical basis and a technical support can be provided for remediation of the pollutants.

The present invention relates to a method for continuously preparing 5-amino-1-pentanol, 1-amino-2-pentanol, and 1,5-pentanediamine using furfural as a raw material. The method comprises the following steps: After hydrogen and the raw material liquid are preheated to 20-150 °C in a preheater, they are simultaneously introduced into a fixed-bed reactor equipped with two sections of catalysts, and reacted at 30-150 °C and a reaction pressure of 0.1-8 MPa to obtain 5-amino-1-pentanol, 1-amino-2-pentanol, and 1,5-pentanediamine; the first catalyst is a metal catalyst supported on graphitic carbon nitride; the active metal of the second catalyst is one, two, or more of Ru, Pt, Rh, Cu, Co, and Ni; the carrier of the second catalyst is γ-Al2O3, TiO2, SiO2, ZrO2, CeO2, ZSM-5, cerium-zirconium solid solution, or activated carbon. The present invention solves the problem of poor selectivity in the process of generating 1,5-pentanediamine, and the product distribution can be changed by changing the catalyst.

A nanocomposite material including iron sulfide (FeS2) nanoparticles, iron oxide (α-Fe2O3) nanoparticles, titanium dioxide (TiO2) nanoparticles, and graphitic carbon nitride (C3N4) nanosheets and a method of its preparation. The nanocomposite is used in a method of forming oxygen gas from water using an applied voltage and photoirradiation, a method of forming hydrogen gas from water using an applied voltage and photoirradiation, and a method of photodegrading organic pollutants using visible light photoirradiation.

The present invention discloses a silver-loaded graphitic carbon nitride nanosheet and its preparation method and application. The preparation method includes: firstly mixing an ammonium salt and a carbon source, drying and then performing high-temperature calcination to generate graphitic carbon nitride nanosheets, and then secondarily mixing the graphitic carbon nitride nanosheets with a reducing agent and a silver source in a solvent, and obtaining the silver-loaded graphitic carbon nitride nanosheets through a hydrothermal reaction. The preparation method is simple, low in cost and environmentally friendly, and the silver-loaded graphitic carbon nitride nanosheets prepared by this method have a high specific surface area, a low photo-generated electron-hole recombination rate and a wide visible light absorption range.

This invention provides a zinc-doped nickel selenide / graphite-phase carbon nitride composite photocatalyst and its preparation method. The method involves adding zinc acetate, nickel chloride hexahydrate, melamine, urea, pyrrole, and polyaniline to deionized water in a mass ratio of (0.5-1.5):(4-6):(4-10):(6-8):(0.125-0.2):(0.25-1) to obtain a mixed solution. The pH of the mixed solution is adjusted to 9-10, and the solution is then mixed thoroughly to obtain a precursor solution. The precipitate obtained after centrifuging the precursor solution is dried to obtain a precursor. The precursor and selenium source are then subjected to a two-stage calcination treatment under an inert atmosphere in a mass ratio of (1-10):(0.2-5). The first stage temperature is 450-600℃, and the second stage temperature is 300-400℃, to obtain the zinc-doped nickel selenide / graphite-phase carbon nitride composite photocatalyst. This invention can effectively increase the number of reactive sites in photocatalysts and expand the migration path of photogenerated carriers, thereby effectively reducing the recombination of photogenerated carriers in photocatalytic materials and fundamentally improving their photocatalytic hydrogen evolution efficiency.

The invention discloses a hard-carbon-doped negative electrode material and a preparation method and application thereof, and the preparation method of the hard-carbon-doped negative electrode material comprises the following steps: S1, carrying out heat treatment on a nitrogen-containing precursor to obtain graphite-phase carbon nitride; grinding into powder, mixing with acid liquor, ultrasonically stirring, and washing to be neutral; drying and adding water to obtain a suspension; s2, mixing and reacting a phenolic compound and an aldehyde compound with an alkaline aqueous solution, then uniformly mixing with the suspension, and carrying out spray drying to obtain dry powder; s3, NaF is placed in a high-frequency plasma reaction bin to form steam, and NaF is deposited on the surface of the dry powder; and S4, in the atmosphere of protective gas, carrying out heat treatment on the dry powder deposited with the NaF, and then carrying out carbon coating. According to the hard carbon-doped negative electrode material provided by the invention, NaF forms steam through a plasma technology to uniformly coat the surface and pores of hard carbon, and then carbon coating is performed through vapor deposition, so that the binding force of NaF is increased, and the specific surface area of the hard carbon material is reduced, and therefore, the hard carbon-doped negative electrode material has high first efficiency and long cycle performance.

The invention relates to the technical field of composite materials, in particular to a graphite carbon nitride catalytic membrane material and a preparation method and application thereof. The preparation method comprises the following steps: mixing melamine, a halogen source and water, drying, and carrying out heat treatment to obtain the halogen intercalation carbon nitride composite material; mixing the halogen intercalation carbon nitride composite material dispersion liquid with a metal salt solution, then adjusting the pH value to be alkaline, carrying out an in-situ coprecipitation reaction to obtain a metal oxide / halogen intercalation carbon nitride heterojunction, and carrying out vacuum calcination on the metal oxide / halogen intercalation carbon nitride heterojunction to obtain metal oxide / halogen intercalation carbon nitride heterojunction composite powder; mixing the metal oxide / halogen intercalation carbon nitride heterojunction composite powder, a polymer carrier and N, N-dimethylformamide to obtain a spinning solution, and performing electrostatic spinning to obtain a nascent fiber membrane; and calcining the nascent fiber membrane to obtain the graphite carbon nitride catalytic membrane material. The preparation method is high in operability, and the prepared material has the characteristics of stable structure and high catalytic efficiency.

The invention discloses a wear-resistant and corrosion-resistant PP material for lithium battery packaging and a preparation method thereof, and belongs to the technical field of composites.The wear-resistant and corrosion-resistant PP material is prepared by taking sepiolite-reinforced silicon dioxide aerogel powder as a framework structure, loading polydopamine-coated carbon nanotubes on the surface, and carrying out ammonification reaction on hydroxyl and amino groups on the surface, so that the wear-resistant and corrosion-resistant PP material is obtained. Polydopamine provides a carbon source and a nitrogen source, carbon nanotubes are uniformly loaded on silicon dioxide aerogel and carbonized, graphite-phase carbon nitride grows on the surface, the obtained carbon nitride / graphene foam composite powder is of a three-dimensional network composite structure in the space structure, an interlayer structure of the graphite-phase carbon nitride is interspersed in the carbon nitride / graphene foam composite powder, and the carbon nitride / graphene foam composite powder has a large specific surface area. According to the present invention, the layered structure generates interlayer slippage under the action of the external force so as to disperse the stress and prevent the brittle fracture of the PP material, and the sepiolite-reinforced silica aerogel powder is adopted as the skeleton structure so as to further improve the toughness of the PP material, such that the use safety of the lithium battery is ensured.

An example method of upcycling plastic waste includes: providing plastic waste to be upcycled; applying an iron (Fe) single-atom catalyst to the plastic waste to be upcycled; and catalyzing, using the Fe single-atom catalyst, a reaction to upcycle the plastic waste to produce acetic acid. The Fe single-atom catalyst may include Fe atoms embedded on a graphitic carbon nitride (C3N4) support framework (Fe@C3N4 SAC). The Fe@C3N4 SAC may operate using a cascade photocatalytic reaction mechanism coupling Fenton and CO2 reduction reactions.

Disclosed are dimeric copper centers supported on graphitic carbon nitride (denoted herein as Cu2@C3N4) and their use as advanced catalysts for partial oxidation of CH4.

The invention discloses a preparation method of a cerium-based compound catalyst for electrosynthesis of hydrogen peroxide through an oxygen reduction reaction. The method comprises the following steps: 1) dissolving cerium nitrate and urea in deionized water, and carrying out hydrothermal reaction and heat treatment to obtain cerium dioxide; 2) carrying out heat treatment on a certain amount of melamine to obtain graphite-phase carbon nitride; (3) adding the prepared cerium dioxide and graphite-phase carbon nitride into methanol and stirring; and finally, performing heat treatment on a sample in a muffle furnace to obtain the cerium dioxide composite graphite phase carbon nitride catalyst. The cerium-based compound catalyst prepared by the preparation method has excellent performance on a two-electron oxygen reduction reaction.

The invention belongs to the technical field of sodium ion battery negative electrode materials, and particularly relates to a nitrogen-doped carbon sphere material as well as a preparation method and application thereof. The preparation method comprises the following steps: (1) uniformly mixing thiourea and melamine, and calcining at high temperature to obtain a sulfur-doped graphite phase carbon nitride precursor; (2) mixing the precursor with metal powder to obtain a metal precursor mixture, and calcining at high temperature to obtain black powder; and (3) carrying out acid leaching, water washing and drying to obtain the nitrogen-doped carbon sphere material. The precursor graphite phase carbon nitride is subjected to heteroatom doping, and high-temperature calcination is performed under the catalysis of metal powder, so that the finally obtained nitrogen-doped carbon spheres are stable in morphology and uniform in distribution.

The invention discloses a modified g-C3N4 heterojunction photocatalytic self-cleaning coating and a preparation method and application thereof.According to the coating, graphite phase carbon nitride g-C3N4 and bismuth titanate form an S-type heterojunction, the coating is of a lamellar structure, and the outermost layer is coated with polydimethylsiloxane; the preparation method comprises the following steps: (1) carrying out hydrothermal reaction on bismuth titanate and graphite phase carbon nitride to obtain a graphite phase carbon nitride nanosheet / bismuth titanate nanosheet S-type heterojunction photocatalyst; and (2) coating the surface of the catalyst with a polydimethylsiloxane prepolymer to obtain a product. The graphite-phase carbon nitride nanosheet is combined with bismuth titanate, and an S-shaped heterojunction is constructed, so that the utilization efficiency of solar visible light is remarkably improved, an oxidation-reduction reaction can be efficiently catalyzed under the irradiation of visible light, organic pollutants on the surface of the coating can be decomposed, and the coating has a self-cleaning capability by coating polydimethylsiloxane; and the removal cost of the organic pollutants is reduced.

This invention provides a three-dimensional carbon nitride photocatalyst with an advanced structure, its preparation method, and its application, relating to the field of photocatalyst technology. The preparation method includes: obtaining graphitic carbon nitride through thermal condensation and nitrogen-rich precursor polymerization; mixing the graphitic carbon nitride in a polyphenol solution, then adding Tris-HCl solution dropwise and stirring to react, causing the polyphenols to polymerize in situ on the surface of the graphitic carbon nitride to form a polyphenol coating; separating and drying the coating to obtain a composite intermediate; mixing and grinding the composite intermediate with molten salt, then calcining it under a protective atmosphere at 400-650℃ to obtain the three-dimensional carbon nitride photocatalyst with an advanced structure. The preparation method provided by this invention is green and environmentally friendly, using readily available and inexpensive raw materials. Simultaneously, the reaction conditions are mild, requiring no template agent. The resulting catalyst has an advanced structure and exhibits extremely high photocatalytic activity for water splitting to produce hydrogen and excellent stability at room temperature and pressure, showing promising application prospects and economic benefits.

This invention discloses a cesium zirconate chloride / acid-modified carbon nitride heterojunction photocatalyst, its preparation method, and its application. Belonging to the field of photocatalytic materials technology, the cesium zirconate chloride / acid-modified carbon nitride heterojunction photocatalyst contains 10%-50% cesium zirconate chloride by molar percentage. The preparation method includes: adding zirconium chloride and tubular graphitic carbon nitride to hydrochloric acid and mixing them evenly to obtain precursor A; dissolving cesium chloride in hydrochloric acid to obtain precursor B; rapidly injecting precursor B into precursor A to rapidly generate a precipitate, which is then purified with methanol to obtain the target product. This invention improves the photocatalytic CO2 photoreduction efficiency by introducing an acid-modified carbon nitride and cesium zirconate chloride composite heterojunction structure. The tubular g-C3N4 can increase the specific surface area of ​​the material, providing more surface active sites; the surface protonation of acid-modified g-C3N4 can increase the polarization degree of g-C3N4, thereby significantly improving the photocatalytic performance and achieving the purpose of improving the photocatalytic activity of the composite material.

To provide a process for efficiently producing graphitic carbon nitride, which is suitable in cosmetic use.SOLUTION: The present invention mainly relates to a process for preparing graphitic carbon nitride, comprising a step of heating at least one precursor compound with at least one metal oxide particle. The present invention also relates to a mixture product prepared by the process according to the present invention, comprising the graphitic carbon nitride and the metal oxide particle.SELECTED DRAWING: Figure 1

A method of inhibiting a cancer cell growth includes contacting the cancer cell with a Cu2(OH)3NO3 / CaSiO3@g-C3N4 nanocomposite material containing graphitic carbon nitride (g-C3N4), copper hydroxide nitrate (Cu2(OH)3NO3) and calcium silicate (CaSiO3), achieving an inhibition efficiency on human breast carcinoma (MCF-7) and human hepatocellular carcinoma (HepG-2) cell growth of greater than 95% in an in-vitro cellular viability assay.

A membrane including a polysulfone / polyethylene terephthalate (PSf / PET) support and an active layer on an outer surface of the PSf / PET support. The active layer comprises reacted units of a diacyl chloride compound, a tetra-amine compound, and a nanocomposite including graphitic carbon nitride and polypyrrole. The membrane of the present disclosure is self-cleaning following exposure to radiation and finds application in water decontamination and de-salination.

A particulate crystalline nanocomposite including: a monoclinic bismuth oxide (Bi2O3) crystalline phase; a calcium silicate (CaSiO3) crystalline phase; and, a graphitic carbon nitride (g-C3N4) crystalline phase, wherein at least a fraction of the g-C3N4 is in the form of mesoporous nanosheets.

This invention provides a carboxyl-functionalized g-C3N4-supported Cu-MOF catalyst, its preparation method, and its application, belonging to the field of photocatalytic materials technology. First, a carbon nitride precursor and a carboxylating agent are mixed in a solvent to undergo a carboxylation reaction, yielding carboxylated graphitic carbon nitride. Then, the carboxylated graphitic carbon nitride is mixed with a copper salt solution for a preliminary reaction, yielding copper-supported C3N4-C powder. Finally, the copper-supported C3N4-C powder and 1,3,5-pyromellitic acid are dispersed in a solvent for a hydrothermal reaction to obtain the carboxyl-functionalized g-C3N4-supported Cu-MOF catalyst. This invention, through directional assembly and growth, ultimately obtains a composite photocatalyst with tight interfacial bonding, stable structure, and high photogenerated charge separation efficiency.

This invention discloses an Fe-doped graphitic carbon nitride material with nitrogen defects, its preparation method, and application. Iron nitrate nonahydrate and 8-hydroxyquinoline are heated in a water bath, and after adjusting the pH, an inky iron ligand is precipitated. The iron ligand is then mixed with melamine and calcined in air to obtain a gray-black powder material, CN-Q-Fe. This material has great potential for treating antibiotic contamination in aquatic environments, and exhibits excellent photocatalytic degradation of tetracycline antibiotics.

The application provides a BiFeO3-graphitic carbon nitride photocatalyst and a preparation method and application thereof, relates to the field of photocatalysis technology, and the preparation method comprises the following steps: dissolving a bismuth source and an iron source in a solvent, mixing with a mineralizer, and performing a hydrothermal synthesis reaction to obtain BiFeO3; performing first calcination treatment on a nitrogen-containing organic precursor to obtain graphitic carbon nitride; and performing grinding treatment and second calcination treatment on the mixture of BiFeO3 and graphitic carbon nitride to obtain the BiFeO3-graphitic carbon nitride photocatalyst. The preparation method can construct a Z-type heterojunction at the interface of the separately prepared BiFeO3 and graphitic carbon nitride, form an internal electric field, efficiently separate photo-generated electrons and holes, effectively inhibit the recombination of the photo-generated electrons and holes, finally significantly enhance the redox capacity of the material, and make the material exhibit excellent photocatalytic performance, high selectivity and good cycle stability.

Disclosed are an anode for a lithium secondary battery, a lithium secondary battery including the anode, and a manufacturing method thereof. In particular, the anode includes a lithium metal layer and an interfacial layer made of phosphorous-doped graphitic carbon nitride and a single ion conducting polymer.

The present invention relates primarily to the use of graphitic carbon nitride containing at least one oxygen atom, as an active ingredient in paints, pigments, plastic fillers, active ingredients in cosmetics, and / or as a sunscreen, such as a UV A and / or UV B absorber. Graphitic carbon nitride can exhibit UV A and / or UV B absorption properties and a white to yellow color, and thus is useful as a UV absorber for various products requiring coloring properties and an attractive appearance.

The invention belongs to the field of novel energy, and relates to a preparation method of a photo-assisted lithium secondary battery positive electrode material. The preparation method is characterized in that widely applied graphite phase carbon nitride (g-C3N4) is used as a matrix, and two kinds of metal grow on the matrix in a monatomic form in modes of oscillation evaporation, annealing and photo-reduction, so that the diatom-doped carbon nitride nanosheet Co / Cu-coated C3N4 is constructed. On one hand, the electron cloud density of the material is changed due to atom doping, so that the energy band structure is changed, Co / Cu-coated C3N4 can be more accurately matched with the electrochemical reaction potential of the lithium secondary battery, and the redox kinetics is promoted; on the other hand, the composite material forms a multi-stage structure, separation of photon-generated carriers is accelerated, recombination of the photon-generated carriers is well avoided, and the service life of photoelectrons is prolonged. Therefore, the performance of the photo-assisted lithium secondary battery is greatly improved.

GRAPHITICAL CARBON NITRIDE WITH METAL OXIDE AND PROCESS FOR PRODUCING ITSELF The present invention relates mainly to a process for preparing graphitic carbon nitride, comprising a step of heating at least one precursor compound with at least one metal oxide particle. The present invention also relates to a mixture product prepared by the process according to the present invention, comprising the graphitic carbon nitride and the metal oxide particle. Figure for the abstract: Figure 1

The application provides application of a graphite-phase carbon nitride photocatalyst loaded with platinum monomers and carbon dots in plastic hydrogen production, relates to the fields of material preparation and photocatalysis, and aims to solve the problem of low photocatalytic efficiency of photocatalysts. The preparation method comprises the following steps: taking urea as raw material, and preparing carbon nitride blocks by a modified thermal etching method; taking citric acid and urea as raw material, and preparing carbon dots by a thermal etching method; taking the carbon nitride blocks and the carbon dots as raw materials, and preparing carbon dot-graphite-phase carbon nitride composite materials by a thermal treatment method; and taking the carbon dot-graphite-phase carbon nitride composite materials and chloroplatinic acid as raw materials, and preparing the graphite-phase carbon nitride photocatalyst loaded with platinum monomers and carbon dots by a freeze photoreduction method. The graphite-phase carbon nitride photocatalyst loaded with platinum monomers and carbon dots prepared by the preparation method has high-activity platinum monomer hydrogen production sites and excellent light-generated electron transfer capacity, so that the photocatalytic hydrogen production efficiency is greatly improved.

A membrane including a polysulfone / polyethylene terephthalate (PSf / PET) support and an active layer on an outer surface of the PSf / PET support. The active layer comprises reacted units of a diacyl chloride compound, a tetra-amine compound, and a nanocomposite including graphitic carbon nitride and polypyrrole. The membrane of the present disclosure is self-cleaning following exposure to radiation and finds application in water decontamination and desalination.