23 results about "Formaldehyde degradation" patented technology

The invention relates to the field of coatings, in particular to an antibacterial formaldehyde-removing art coating and a preparation method thereof.The antibacterial formaldehyde-removing art coating is prepared from, by weight, 35-55 parts of organic silicon modified acrylic emulsion, 10-20 parts of filler, 3-8 parts of antibacterial formaldehyde-removing composite material, 5-10 parts of pigment, 0.1-0.3 part of defoaming agent, 0.1-0.5 part of dispersing agent, 0.2-0.6 part of thickening agent and 10-20 parts of deionized water. According to the prepared coating, the self-crosslinking type organic silicon modified acrylic emulsion is used, a compact and durable paint film can be formed, and stable support is provided for functional components. The antibacterial formaldehyde-removing composite material and the porous filler are introduced, formaldehyde and bacteria are physically adsorbed and enriched through a porous frame of the antibacterial formaldehyde-removing composite material and the porous filler, then a loaded bimetallic complex is used as an efficient catalytic center, formaldehyde is degraded into harmless substances, and meanwhile, the antibacterial formaldehyde-removing composite material also has an efficient and lasting broad-spectrum antibacterial effect.

The application relates to the technical field of building materials, and particularly discloses a mortar material capable of degrading formaldehyde as well as a preparation method and application thereof. The mortar material capable of degrading formaldehyde comprises the following raw material components in mass fractions: cement 75-95 parts, quartz sand 100-130 parts, reinforcing agent 10-15 parts, water reducing agent 1-2 parts, dispersant 3-5 parts, stabilizer 0.5-1 part and composite degradation material 30-50 parts; wherein the composite degradation material comprises yttria modified sericite powder, expanded graphite powder loaded with manganese dioxide and tourmaline powder. The mortar material capable of degrading formaldehyde provided by the application has good compressive strength and bending strength and excellent formaldehyde degradation performance, can realize rapid formaldehyde degradation, does not need to rely on a light source, and effectively makes up for the defects of the prior art.

The application discloses a kind of delta-MnO2-GO catalyst and its preparation method and application in room temperature formaldehyde degradation, it is related to inorganic catalyst technical field.The preparation method of delta-MnO2-GO catalyst of the application can significantly limit the growth of manganese dioxide nanosheet by doping with low amount of GO, to manufacture abundant mass transfer transmission channel, delta-MnO2-GO catalyst presents unique two-dimensional crown structure, two-dimensional coral-like hierarchical pore structure delta-MnO2 nanorod is uniformly dispersed on the GO of plane structure, greatly promote the exposure of catalytic site and the mass transfer of reactant, produce a large number of surface active oxygen ROS and hydroxyl radical-OH, greatly maintain the excellent catalytic activity and stability to HCHO degradation, stably realize nearly 100% HCHO elimination at room temperature.

The invention discloses a photocatalyst for hydrogen production by reforming a formaldehyde solution and a preparation method of the photocatalyst, and belongs to the crossing field of catalyst preparation and a hydrogen energy technology. The photocatalyst is a bimetallic structure material with different Mn and Ni molar ratios, and the molecular formula of the photocatalyst is MnxNiy / C3N4. The preparation method comprises the following steps: adding manganese acetate and nickel chloride in different proportions to adjust the feeding ratio of Mn to Ni in the catalyst, uniformly dispersing the mixture in deionized water containing C3N4, dropwise adding a sodium borohydride solution, continuously stirring to obtain a precursor, and calcining in a hydrogen atmosphere to obtain the catalyst. The photocatalyst can synchronously realize formaldehyde degradation and stable hydrogen production, and the hydrogen production rate can reach 134.53 mmol.h <-1 >. G <-1 >. The photocatalyst shows excellent photocatalytic formaldehyde reforming hydrogen production performance under the mild reaction condition without a sacrificial agent, the problem that a traditional catalyst depends on the sacrificial agent can be solved, and the dual benefits of pollutant degradation and clean energy preparation can be achieved through efficient conversion of formaldehyde.

This invention provides an N-doped TiO₂ 2 -BiVO 4 This invention relates to heterojunction photocatalytic coatings, their preparation methods, and applications, belonging to the field of photocatalytic materials technology. The invention achieves nitrogen doping through nitrogen source pyrolysis, forming a N-doped Bi-Ti heterojunction. Furthermore, by optimizing the Bi:Ti molar ratio, a tight heterojunction interface can be formed, redshifting the light absorption edge to 600 nm and improving carrier separation efficiency. N doping introduces intermediate energy levels, resulting in BiVO₄… 4 By broadening the light response range, the two work together to achieve a net formaldehyde degradation rate of 78% in 24 hours, while also solving the problems of low visible light utilization and poor adhesion of existing photocatalytic coatings.

The application discloses a composite photocatalytic material and a preparation method and application thereof, and relates to the technical field of photocatalytic materials. 12 The composite photocatalytic material comprises a bismuth-based composite oxide layer and a phenolic resin layer loaded on the surface of the bismuth-based composite oxide layer; the material of the bismuth-based oxide layer is selected from at least one of Bi2WO6, BiVO4, Bi2Mo3O 12 The phenolic resin layer is irradiated by photon energy, surface-escaping electrons can participate in a water redox reaction to generate H2O2, and then the H2O2 can react with formaldehyde gas to generate formic acid and water, so that the formaldehyde degradation is realized; and the bismuth-based composite oxide layer can promote water splitting to generate oxygen under the action of light, the generated oxygen can promote the redox reaction of the phenolic resin layer, accelerate the generation of H2O2, improve the concentration of H2O2, and thus improve the formaldehyde degradation efficiency, so that the composite photocatalytic material can realize efficient photocatalytic degradation of formaldehyde.

The application discloses a preparation method of a photocatalytic material Bi / Bi2MoO6 / BiOBr for indoor formaldehyde degradation, which comprises the following steps: dissolving bismuth nitrate and sodium molybdate in ethylene glycol respectively to prepare bismuth nitrate solution and sodium molybdate solution; adding the sodium molybdate solution into the bismuth nitrate solution drop by drop to prepare a mixed solution, adding ethanol and BiOBr, stirring and ultrasonicating, transferring into a high-pressure reaction kettle, heating to 160 DEG C and keeping for 12 hours, drying the product to obtain Bi2MoO6 / BiOBr; dissolving the Bi2MoO6 / BiOBr in water and ultrasonicating, adding a sodium borohydride solution and stirring, washing with water and centrifuging, and drying the product to obtain Bi / Bi2MoO6 / BiOBr. The application provides a preparation method of the photocatalytic material Bi / Bi2MoO6 / BiOBr, which adopts a simple hydrothermal method and a sodium borohydride reduction method, and the ternary photocatalyst formed has excellent degradation effect on gaseous formaldehyde.

The invention relates to the field of filter materials, in particular to a photocatalyst-loaded filter screen and a preparation method thereof.The photocatalyst-loaded filter screen comprises a filter screen body and a photocatalyst coating, the photocatalyst coating is loaded on the surface of the filter screen body in the form of gel, the gel is formed by co-doped sol, and the photocatalyst coating is coated on the surface of the filter screen body. The co-doped sol is obtained by carrying out hydrolysis-polycondensation reaction on an ethanol mixed solution of tetrabutyl titanate, magnesium nitrate, ferric nitrate and urea, and the molar ratio of Ti to Mg to Fe to N in the ethanol mixed solution is 100: 3: 2: 5. According to the photocatalyst-loaded filter screen disclosed by the invention, Ti, Mg, Fe and N are co-doped, so that the formaldehyde degradation rate of the material is synergistically improved on the basis of improving the hydrogen yield of the material, and the photocatalytic activity and the spectral response range are simultaneously improved.

According to the application of the difunctional microcapsule in formaldehyde degradation, the difunctional microcapsule is of a core-shell structure, the core is a phase change material, and the shell is a polymer layer containing TiO2 nanoparticles. According to the technical scheme, the photo-generated carrier separation efficiency can be remarkably improved, the durability is enhanced, meanwhile, the inner core part of the microcapsule can further play an energy storage or heat management function, and the dual-function cooperation of photocatalysis and energy regulation and control is achieved.

The invention belongs to the technical field of high polymer materials, and particularly relates to an in-vehicle aldehyde substance purification filler based on a coordination polymer and a preparation method. The in-vehicle aldehyde substance purification filler comprises an aldehyde targeting coordination polymer and a carrier with a purification function, and the aldehyde targeting coordination polymer is loaded on the carrier with the purification function. According to the technical scheme, the purification efficiency of the in-vehicle aldehyde substance purification filler based on the coordination polymer is remarkably improved, through precise molecular design of the aldehyde targeted coordination polymer, the specific pore diameter of the aldehyde targeted coordination polymer is highly matched with the molecular size of formaldehyde and acetaldehyde, and selective adsorption of aldehyde substances is achieved. Metal active sites Cu or Zn in the coordination polymer can catalyze aldehyde molecules to be subjected to oxidative degradation reaction, the highest formaldehyde degradation rate within 6 hours reaches 88.6%, the acetaldehyde degradation rate reaches 84.2%, and the equilibrium adsorption capacity reaches 22.5 mg / g and is 2.5 times or above that of a traditional mineral adsorption material.

The invention relates to the technical field of industrial wastewater treatment, in particular to a catalysis-ultrasonic synergistic treatment process and system for targeted degradation of formaldehyde in wastewater, and is used for solving the problems of no selectivity, high energy consumption, weak impact resistance and poor long-period stability of high-concentration formaldehyde wastewater treatment in related technologies. The system comprises a reactor main body, a catalyst unit, an array ultrasonic unit, an intelligent regulation and control unit and an auxiliary unit, and all the units form a full-closed-loop integrated processing system of data acquisition, prediction calculation, instruction execution and feedback correction through structural assembly linkage and signal transmission cooperation. The technical problems of unstable formaldehyde degradation efficiency, high energy consumption, weak impact resistance and poor adaptation to extreme working conditions in the prior art can be solved in modes of two-dimensional partition adaptation, dual-drive cavitation coordination, intelligent closed-loop regulation and unit integrated coordination.

The invention discloses a method for in-situ construction of a Co (OH) 2 / Co3O4 heterojunction material through hydrothermal temperature regulation and control and application of the Co (OH) 2 / Co3O4 heterojunction material in indoor formaldehyde purification, belongs to the technical crossing field of material preparation and volatile organic compound purification, and aims at solving the problems that an existing cobalt-based photocatalytic material is complex in preparation process, insufficient in catalytic performance and poor in stability. Phase change from Co (OH) 2 to Co3O4 and heterojunction in-situ construction are achieved through single hydrothermal temperature variable regulation and control, specifically, a precursor suspension is subjected to a hydrothermal reaction for 48 h at 410-470 K, the Co (OH) 2 / Co3O4 composite heterojunction material with the controllable surface hydroxyl content is obtained, the heterojunction can enhance the visible light absorption capacity of the material, separation and migration of photo-induced electrons and holes are effectively promoted, and the visible light absorption capacity of the material is improved. Therefore, the photocatalytic reaction efficiency is obviously improved; wherein a CC150 sample (Co (OH) 2 is a main phase) prepared by 423K has a degradation rate of 99.15% and a mineralization rate of 99.59% for 200ppm formaldehyde within 11min under visible light, the activity is not attenuated after continuous operation for 6.5 h, and the CC150 sample has broad-spectrum degradation capability for toluene, benzene and the like. The method is simple in process, low in cost, excellent in material performance and high in stability, can be widely applied to indoor formaldehyde treatment, has important application prospects in the aspects of decoration pollution treatment and indoor air quality improvement, and has extremely high practical value.

The preparation method comprises the following steps: firstly, taking a PET (Polyethylene Terephthalate) film as a base material, and compounding medical non-toxic acrylate coating glue on the surface of the PET film; secondly, bonding a nano carbon nitride sol-gel film on a base material, spraying a CaO solution, and drying; and finally, sequentially growing the three molecular sieve crystals on the surface of the carrier to form a film. The molecular sieve aperture and the specific surface area of the adsorption layer are sequentially decreased from outside to inside, a polymolecular layer with a long and narrow pore channel is formed, diffusion of formaldehyde gas molecules in the polymolecular layer is facilitated, and the efficient and accurate adsorption effect is achieved through strong coulomb force. The adopted nano carbon nitride has a visible light response function and can degrade formaldehyde into carbon dioxide and water, and the added nano calcium oxide can well adsorb photocatalytic products (carbon dioxide and water), so that the adverse effect of competitive adsorption between water vapor and formaldehyde particles caused by the strong hydrophilicity of a molecular sieve is eliminated, and the formaldehyde adsorption effect is improved. Therefore, the benefit of efficient and sustainable use is achieved.

The application belongs to the technical field of photocatalysts, and discloses a CdIn2S4Sv / Bi2O3 composite material and a preparation method and application thereof. Bi2O3 nanofibers are synthesized by controlling calcination after electrospinning, serving as an ideal substrate for subsequent growth of CdIn2S4Sv, and then CdIn2S4Sv and CdIn2S4Sv / Bi2O3 are synthesized by a simple oil bath method. The composite material exhibits significant photocatalytic performance in the production of hydrogen peroxide without a sacrificial agent in pure water, and the production rate is much higher than that of original CdIn2S4Sv, Bi2O3 and most reported S-scheme heterojunctions. In addition, the composite material realizes efficient degradation of formaldehyde, and exhibits potential for multifunctional application. The application establishes a comprehensive design paradigm, integrating interface chemical bonding, defect engineering and heterojunction structure, to realize advanced photocatalytic application.

The invention relates to the technical field of building materials, and particularly discloses a mortar material capable of degrading formaldehyde as well as a preparation method and application of the mortar material. The mortar material capable of degrading formaldehyde comprises the following raw material components in parts by mass: 75-95 parts of cement, 100-130 parts of quartz sand, 10-15 parts of a reinforcing agent, 1-2 parts of a water reducing agent, 3-5 parts of a dispersing agent, 0.5-1 part of a stabilizer and 30-50 parts of a composite degradable material, wherein the composite degradable material comprises yttrium oxide modified sericite powder, expanded graphite powder loaded with manganese dioxide and tourmaline powder. The mortar material capable of degrading formaldehyde provided by the invention has good compressive strength and breaking strength and excellent formaldehyde degradation performance, can realize rapid degradation of formaldehyde, does not need to depend on a light source, and effectively makes up for the defects in the prior art.

The application aims to provide a sandwich structure formaldehyde degradation functional alkali-activated cementitious material, which is composed of an intermediate layer and surface layers covering the upper and lower surfaces of the intermediate layer, and the intermediate layer and the surface layers comprise the following raw materials: 40-60 parts by mass of blast furnace slag, 10-20 parts by mass of low-calcium fly ash, 10-20 parts by mass of alkaline magnesium slag, and 10-15 parts by mass of alkali-activator; the surface layers further comprise 2-7 parts by mass of functional catalyst; the functional catalyst is gel-like micro-nano TiO2 particles. The sandwich structure formaldehyde degradation functional cementitious building material has an alkali-activated cementitious material intermediate composed of C-A-S-H gel and three-dimensional network zeolite-like structure, and a hydrophobic gel-like TiO2 photocatalyst layer-like outer layer. The indoor living environment is improved, the application field of the photocatalyst is widened, and high-value-added application of solid waste-based alkali-activated cementitious material is realized.

The invention discloses a preparation method of a graphite carbon nitride material with all-weather catalytic activity, which specifically comprises the following steps: mixing melamine, cyanuric acid and water, stirring, carrying out hydrothermal reaction, washing, and carrying out vacuum drying to obtain a carbon nitride precursor; and adding the carbon nitride precursor and the strontium aluminate long-afterglow luminescent material into an ethanol-glycerol mixed solution, reacting in an oil bath, washing, drying in vacuum, and calcining to obtain the strontium aluminate long-afterglow luminescent material. The graphite carbon nitride material with a high specific surface area and a strong interface built-in electric field is successfully prepared by constructing an S-type heterojunction, and the graphite carbon nitride material still has excellent degradation efficiency on formaldehyde under a simulated dark condition; the excellent formaldehyde degradation performance comes from abundant active sites provided by the high specific surface area of the material, and a strong built-in electric field formed at an S-shaped heterojunction interface can be used as an efficient electron driver to effectively promote directed migration and spatial separation of photo-induced electrons and holes, so that the photocatalytic performance of the material is improved. And more photo-induced electrons and holes participate in the oxidation-reduction reaction.

An ultrafine photocatalyst comprising TiO2, the surface of which is doped with carbon and an interlayer of C7H8O. The catalyst is prepared by1) adding titanium tetrachloride dropwise into phenylethan

This invention relates to a production method for manufacturing high-performance air conditioning filters, comprising the following steps: Step 1: Mixing 30-40 parts of bisphenol A type epoxy resin, 2-5 parts of isocyanate curing agent, 3-6 parts of silane coupling agent KH560, and 20-25 parts of acetone solvent to obtain an epoxy resin matrix; Step 2: Adding 4-7 parts of modified attapulgite agent, 3-5 parts of load conditioner, and 3-6 parts of nano silver powder to the 20-25 parts of epoxy resin matrix and mixing thoroughly to obtain an application agent. This invention produces high-performance air conditioning filters by using an epoxy resin matrix in combination with modified attapulgite agent, load conditioner, and nano silver powder. Through the synergistic effect of the added modified attapulgite agent and load conditioner, the antibacterial properties and formaldehyde degradation rate of the product are improved in a coordinated manner, and the product exhibits significant performance stability under low-temperature conditions.

The invention provides a high-efficiency photocatalysis synergistic formaldehyde purification fireproof coating and a preparation method thereof, and relates to the field of building coatings. The method comprises the following steps: preparing N-Ce-TiO2 powder by taking titanium tetrachloride, cerous nitrate and urea as raw materials; the preparation method comprises the following steps: by taking highly oriented pyrolytic graphite as an anode and a platinum sheet as a cathode, adding 3-aminopropyltriethoxysilane for modification to obtain an aminated GQDs solution; the preparation method comprises the following steps: mixing N-Ce-TiO2 powder and an aminated GQDs solution to react, so as to obtain an N-Ce-TiO2 / GQDs composite photocatalytic functional body; and finally, sequentially adding deionized water, an auxiliary agent, a filler, an acid source, a carbon source, a foaming agent, film-forming resin and the N-Ce-TiO2 / GQDs composite photocatalytic functional body according to a ratio, and then adding deionized water for regulation, so as to prepare the high-efficiency photocatalytic synergistic formaldehyde purification fireproof coating. The problems that an existing photocatalytic fireproof coating is narrow in visible light response range, low in formaldehyde degradation efficiency and high in photon-generated carrier recombination rate, catalytic activity is prone to inactivation, fireproof performance and a purification function are difficult to consider at the same time, harmful by-products are possibly generated and the like are solved.

This invention relates to the field of water treatment and discloses a strain of *Methylorubrum aminovorans* and its application in treating high-concentration formaldehyde wastewater. This *Methylorubrum aminovorans* strain is named 3-5-6, and its microbiological classification is *Methylorubrum aminovorans*. It was deposited at the China General Microbiological Culture Collection Center (CGMCC) on November 24, 2025, with accession number CGMCC No. 36747. This invention provides a formaldehyde-degrading bacterium that can tolerate high concentrations of formaldehyde and optimizes its degradation conditions to improve the treatment effect of high-concentration formaldehyde wastewater.

The invention discloses inorganic dry powder nano paint with negative ions and a formaldehyde degradation function and a production process. The coating is prepared from the following raw materials in percentage by weight: 20%-30% of pure acrylic redispersible latex powder, 3%-5% of 160-mesh high-purity polyvinyl alcohol, 24%-28% of rutile titanium dioxide, 5%-8% of calcined kaolin, 5%-10% of talcum powder, 10%-15% of zeolite powder, 4%-7% of silicon dioxide, 2%-4% of high-mesh ground calcium carbonate, 0.1%-0.15% of hydroxyethyl vitamin ether and 0.05%-0.1% of hydroxy propyl cellulose ether. The formaldehyde degradation agent is prepared from the following components in percentage by weight: 0.1%-0.15% of a thickening agent, 0.2%-0.5% of citric acid, 0.2%-0.5% of inorganic iron oxide toner, 0.5%-0.1% of formaldehyde degradation photocatalyst powder and 0.005%-0.01% of negative oxygen ion ecological liquid. According to the present invention, the formaldehyde degradation photocatalyst powder can emit negative ions under illumination, the negative oxygen ion ecological liquid is matched to perform negative ion release so as to purify air, such that the environmental protection effect is provided, and the materials adopted by the inorganic dry powder nano-paint are non-toxic and harmless to the human body, and are detected by the national detection center, such that the environmental protection effect is provided; the limited quantity of seven harmful substances in the inorganic dry powder nano paint is zero.

The invention relates to a multifunctional environment purification composite material, in particular to a composite material which does not depend on rare earth oxide, can continuously release negative ions and efficiently remove formaldehyde and peculiar smell and has high far infrared emissivity and a preparation method of the composite material. The composite material comprises the following raw materials in percentage by mass: 25-50% of silicon carbide; 20 to 45% of titanium dioxide; 10-25% of zinc oxide; 10-25% of a composite negative ion accelerator; wherein the composite negative ion accelerant is formed by compounding germanium-containing mineral powder or rare earth mineral powder and alkaline earth metal carbonate according to the mass ratio of (0.5-2): 1. Through the synergistic effect of all the components, stable negative ion release (larger than or equal to 5000 ions / cm), high far infrared emissivity (larger than or equal to 0.90) and efficient formaldehyde degradation (the 24-hour removal rate is larger than or equal to 90%) can be achieved at normal temperature and normal pressure. The product has the advantages of easily available raw materials, low cost and simple process, is suitable for various substrates such as coatings, ceramics, plastics, textiles and the like, and has wide application prospects.