5261 results about "Photocatalysis" patented technology

The invention provides a thick coating material capable of purifying air and a preparation method thereof, belonging to the building material field. An internal wall coating decorative material comprises 5 to 40 weight portions of a porous absorbing material and 10 to 40 weight portions of a composite photocatalysis material in every 100 weight portion of the paint. In the preparation method, the coating material, is formed by compounding a mineral material with the nanometer photocatalysis material to obtain a high activity purifying material, matching the high activity purifying material with other nanometer materials and the porous absorbing material, and then adding an inorganic filling material, a skeletal material and other addition agents, can remove harmful gases such as formaldehyde and toluol in air and has the environmental protection function. The paint has good effect for removing formaldehyde, is effective continuously, has certain thickness when the coating layer is used, has simple construction, and beautiful and elegant patterns, is well-bedded, is strong in the three-dimension effect and has good decorative effect.

The present invention relates to a polymer nano-composite of the functional inorganic nano-particle with intermingle prepared by electrospinning method, and the use of the composite. The precursory sol of the functional inorganic nano-particle is prepared by the sol-gel method, and is mixed with the polymer solution to form spinning fluid, adding precursor of dopant if necessary, and then the mixed spinning fluid is sprayed on to the electric collecting board with the action of the electric field force by electrospinning method to obtain functional polymer nano-composite with intermingle. The equipment of the invention is simple, the operation is easy, the components, structure and characteristics of the composite is easy to control, the structure is stable, the inorganic nano-particle is dispersed uniformly. According to the difference of the functionality of the inorganic nano-particles, the composite can be used in conducting material, antistatic material, magnetic material, electrochromic material, photocatalysis and ecology environment material, antibiosis material and biomaterial.

The invention provides a water purification system and method for combining ultraviolet germicidal irradiation and photocatalysis in a helical reactor geometry that maximizes both the photocatalytic efficiency and the germicidal dosage of the ultraviolet irradiation in deactivation of microbes and the destruction of contaminant organic compounds.

The present invention provides a photocatalyst composite in which brittleness and ease of coming-off of a photocatalyst layer are reduced.

The photocatalyst composite includes a base material, at least the surface of which is formed of a plastic-deformable solid material; an inorganic particle layer containing inorganic particles disposed on the surface of the base material; and a photocatalyst layer containing a photocatalyst disposed on the surface of the inorganic particle layer; wherein at least one portion of voids in the inorganic particle layer is filled with the solid material, and the surface of the inorganic particle layer is coated with the solid material except for at least one portion.

The invention provides an air purification system and method for combining filtration, ultraviolet irradiation, and photocatalysis, in an annular geometry that maximizes the photocatalytic efficiency of the ultraviolet light in the deactivation of microbes and the photocatalysis of volatile compounds.

The invention discloses a preparation method of nano cuprous oxide. In the method, copper chloride and copper nitrate are taken as copper sources, hydrazine hydrate, glucose and an ascorbic acid and the like are taken as reducing agents, and cuprous oxide materials in the shape of an octahedron, a hollow sphere, a cube and a hollow cube and the like are successfully obtained by using a liquid-phase reduction method and a hydrothermal method. Required raw materials for preparation are rich, the cost is low, and no waste is produced. The preparation process is simple, and the repeatability is good. Cuprous oxide nano-materials have wide applications in the aspects of photocatalysis, gas-sensing materials, antibacterial materials, and the like.

The invention provides a multi-shell-layer metal oxide hollow ball and a preparation method thereof. A hydrothermal method is used for preparing a carbon ball template; metal salts are dissolved in carbon ball suspension liquid, and the gradient distribution, the depth and the number of metal salts entering carbon balls are controlled through regulating adsorption conditions such as metal salt concentration, solution pH value, soaking temperature and time and the like; and the heat treatment is carried out on the carbon balls adsorbing metal ions, and the multi-shell-layer metal oxide hollow ball can be obtained. The shell-layer of the hollow ball prepared by the method is formed by accumulating nanometer crystal particles of metal oxides, the shell layer number can be regulated and changed from two to four, and both the size of the hollow ball and the thickness of the shell layers are controllable. The method provided by the invention is simple and is easy to implement, the controllability is high, the pollution is little, the cost is low, and in addition, the general applicability is realized. The prepared product has a hollow structure and the shell layers with the thickness inthe nanometer level, simultaneously, the internal space can be effectively utilized through the multilayer structure, and the multi-shell-layer metal oxide hollow ball is applied to gas sensitivity and photocatalysis and has the more excellent performance through being compared with the traditional nanometer material and a single-layer hollow ball.

The invention provides a plastic composition and a surface selective metallization process thereof. The plastic composition comprises a high molecular polymer and a photocatalyst, wherein the mass ratio of the polymer to the photocatalyst is 1 to 100. The surface selective metallization process of the plastic composition comprises the following steps: performing laser etching on the surface of theplastic composition; putting the plastic composition after the laser etching into an aqueous solution containing a metal ion salt and a cavity sacrificial agent to perform photocatalysis reduction reaction so as to obtain a plastic composition with nanometer metal particles on the surface; and finally performing metal chemical plating. By adopting the plastic composition and the surface selectivemetallization process of the plastic composition, the bonding force of a plating layer and the chemical plating precision are very high.

The invention provides a long-acting mould-proof wood plastic composite material and a preparation method thereof and relates to a double-layer wood plastic composite material which is prepared by mixing surface grafting modified plant fiber power, recycle plastic power and mould-proof functional additive and adopting coextrusion technology, wherein the double-layer wood plastic composite material uses the wood plastic composite material as sandwich layer and the mould-proof functional plastic layer as surface layer. The long-acting mould-proof wood plastic composite material contains 9-29mm of wood plastic sandwich layer and 0.5-1.5mm of mould-proof functional surface layer. The plant fiber power in the sandwich layer is processed through organosilicon surface modification. The mould-proof additive in the surface layer has photocatalysis function and is also processed through organosilicon surface modification. The microcosmic interfacial properties of the entire wood plastic composite material are good. The components are melted, mixed and processed through coextrusion to prepare the long-acting mould-proof wood plastic composite material of the invention. The wood plastic composite material has good long-acting mould-proof function; and as the surface layer is a plastic layer, the wood plastic composite material is ensured to have low water absorption and good mechanical properties. The wood plastic composite material of the invention can be applied in fields such as indoor and outdoor decorations, furniture and packages.

The invention relates to a treatment method for small water quantity refractory wastewater deep purifying and utilizing. The method comprises the following steps: step one, pre-filtrating wastewater is performed firstly; step two, the pH value of the wastewater is adjusted to 3-5 to ensure the wastewater to present subacidity; step three, the wastewater flows into a spout-fluid bed reaction tower, the wastewater is processed through a micro-electrolysis method, and micro-electrolysis composite functional material is utilized in the micro-electrolysis method; step four, the wastewater is processed through a photo-assisted fenton catalytic oxidation method; step five, the pH value of the wastewater is adjusted to 6.8-7.8, and then the wastewater is processed through strengthen flocculation method; step six, the wastewater flows to a microwave catalysis reactor, and is processed through a microwave catalytic oxidation method; step seven, the wastewater flows into a UV photochemical reactor, and is processed through the UV photocatalysis; step eight, the wastewater flows into a gravitation filter, and the wastewater can be clarified to meet the requirement of the reuse water quality. The invention also provides equipment for performing the treatment method.

The invention discloses wallpaper with an air purifying function and a preparation method. The wallpaper comprises a wallpaper base layer, wherein the wallpaper base layer is printed with a coating and the coating comprises film-forming resin, an inorganic porous powder, a photocatalyst, an antibacterial agent, an organic aldehyde removing agent and an organic deodorant. In the wallpaper with the air purifying function, the inorganic porous powder is capable of quickly adsorbing harmful gases in air, the organic aldehyde removing agent and the organic deodorant are capable of removing formaldehyde and deodorizing quickly and efficiently, the antibacterial agent is capable of preventing mildew and sterilizing efficiently, and the photocatalyst is capable of decomposing indoor volatile organic contaminants everlastingly, and therefore, the capability of purifying the air of the wallpaper for a long time is improved. The wallpaper has the functions of removing the formaldehyde, deodorizing and sterilizing quickly and efficiently at the beginning of home decoration, and purifying the air everlastingly in daily life.

A novel method for fabrication of hybrid semiconductor-graphene nanostructures in large scale by floating graphene sheets on the surface of a solution is provided. Using this approach, crystalline ZnO nano/micro-rod bundles on graphene fabricated using chemical vapor deposition were prepared. UV detectors fabricated using the as-prepared hybrid ZnO-graphene nano-structure with graphene being one of the two electrodes show high sensitivity to ultraviolet light, suggesting the graphene remained intact during the ZnO growth. This growth process provides a low-cost and robust scheme for large-scale fabrication of semiconductor nanostructures on graphene and may be applied for synthesis of a variety of hybrid semiconductor-graphene nano-structures demanded for optoelectronic applications including photovoltaics, photodetection, and photocatalysis.

The invention provides a photocatalytic air fresh coating and a preparation method thereof, and belongs to the field of indoor coating material, in particular to a coating for purifying air through a photocatalytic material and an anion generating material. The coating comprises the following raw materials in weight portion: 20 to 32 portions of deionized water, 1 to 2.0 portions of antifreeze agent, 0.1 to 0.2 portion of wetting agent, 0.5 to 0.6 portion of dispersing agent, 0.2 portion of preservative, 0.1 to 0.2 portion of pH regulator, 1 portion of nano titanium dioxide, 2 to 2.5 portions of the anion generating material, 20 to 25 portions of rutile titanium dioxide powder, 2 to 2.5 portions of diatomite, 12 to 15 portions of coarse whiting, 1 to 2 portions of film forming auxiliary, 25 to 45 portions of acrylic acid latex and 1 to 2 portions of thickening agent. The coating can keep the indoor air fresh for a long time and reach the first class indoor air environment standard of the nation. The anion releasing quantity of the coating reaches 2,626/cm<3> and the antibacterium and bacteriostasis ratio of the coating reaches more than 97 percent.

The invention discloses a nitrogen-doped graphene/molybdenum disulfide composite material, and a preparation method and application thereof. The nitrogen-doped graphene/molybdenum disulfide composite material is obtained by mixing a graphite oxide solution, a nitrogen-containing precursor, a sulfur-containing precursor and a molybdenum-containing precursor in a solution, removing the solvent or hetero-ion to obtain a precursor material, performing heat treatment on the precursor material under the protection of an inert gas, and performing nitrogen doping and crystallization. The nitrogen-doped graphene/molybdenum disulfide composite material is applicable to lithium ion batteries, sodium cells, magnesium cells, hydrogen generation under electrocatalysis, hydrogen generation under photocatalysis and super capacitors, and is capable of improving the capacity of an anode material and also enhancing the cycling performance and the rate performance of the anode material when being used as a lithium ion battery anode material.

A photocatalysis process toothbrush comprising a handle with a grip at a proximal end and a head at a distal end thereof. The head has at least one group of bristles and at least one blue light emitter is provided on an upper surface of the head for emitting blue light in a direction generally parallel to the bristles. At least one blue light source is provided for radiating blue light, in a wavelength band between 420 nm to 480 nm, and a power source is provided for energizing the at least one blue light source. The blue light is at least one of modulated emission with an average optical output power level of less than 5 watts.

The invention provides an imine coupled covalent organic framework material and a preparation method and application thereof and belongs to the technical field of porous materials. The structural formula of the imine coupled covalent organic framework material is shown in the description, and the material can be prepared by triazinyl aromatic polyamine A and alkoxy substituted aromatic aldehyde B through simple Schiff base condensation reaction. Under visible light excitation condition, the prepared imine coupled covalent organic framework material can catalyze multiple types of organic reactions, specifically for example reaction for photocatalysis of N-aryl tetrahydroisoquinoline and nucleophilic reagent. The prepared covalent organic framework material has very good chemical stability and heat stability, high specific surface area and high crystallinity, has strong visible light absorption properties, can serve as an excellent heterogeneous photocatalyst and has good industrial application prospect.

A combined-typed air purification and sterilization device, is used in air purifying field. The invention consists of particle collecting component, ozone- photocatalysis, air and water departing component, water spray-air and water isolation component. Particle collecting component is installed in the front with ozone-light catalysis at its back and water spray-air and water isolation component at last, all of them are separate and parallel with each other, linking closed to air pipe all around, and all the air currents cross particle collecting component , ozone- photocatalysis and water spray- air and water isolation component. The invention combines water mist absorption technique with the photocatalysis and ozone technique, uses water mist to absorb organic pollutant and ozone gas remained and creates clean air. The invention has excellent sterilization ability and absorbing organic pollutant effect, especially suitable for air purification in room of central air conditioning system to eliminate cross transmission of infectious disease caused by using central air conditioning system effectively, and used as air humidifying and purifying device as well.

This invention relates to a photoelectromagnetic integrated advanced oxidation method and its device for waste water, which first of all acidizes the waste water, then strongly magnetizes it to generate energy of physical change and chemical change then enters into a photo-catalyzing box to be oxidated mostly to CO2 and water under the actioin of photo-catalyst, ultraviolet light, ozone and oxydol, in which, molecular chains of some hard-degradated substances are broken, then the waste water is micro-electrolysed to adsorb and recover the hard degraded substances under the action of extra low voltage, weak current and air, ozone and oxydol to get rid of COD, color degree, deodorizatin and disinfectant finall to filter it by diatomite and filter out suspending substances to reach the standard or recover it.

The invention provides a modification method of a hollow glass microballoon surface. Titanium dioxide coating layers are uniformly clad on the hollow glass microballoon surface by adopting a titanium salt back dripping method, so that the heat insulating property of the hollow glass microballoon can be improved obviously, and the production process is simplified. The method can fully bring into play the characteristics of the hollow glass microballoon and titanium dioxide in performance, make the best of the two and lead to synergistic effect. Therefore, the filling material of the hollow glass microballoon, after being modified, has diverse filling functions and the advantages of heat resistance, heat reflection, photocatalysis etc., so as to meet different needs. The invention also provides the application of the method in the manufacture of head insulating coatings.

The invention discloses a medical air purifying sterilizer and an operation mode thereof and belongs to the technical field of air exchange devices. The medical air purifying sterilizer comprises a shell, an outdoor new air inlet, a new air inwards-leading fan, a full-heat exchanger core, an indoor direction-changeable vent, an indoor dirt air inlet, a dirt air outwards-leading fan and an outdoor dirt air outlet and further comprises a humidifier, an air purifying and sterilizing system, a centrifugal fan and an indoor sterilizing and purifying outlet. The shell is a cabinet type shell, and the whole cabinet type shell is of an air-pipe-free vertical cabinet floor stand structure. The air purifying and sterilizing system comprises a low-efficiency filter, a medium-efficiency filter, a high-voltage electrostatic dust collector, an activated carbon absorber and a photocatalyst catalyzing and sterilizing sterilizer. A new air inwards-introduced and energy recovery channel, a dirt air discharging and energy recovery channel, an air purifying and sterilizing channel and a new air inwards-leading, energy recovery and air purifying and sterilizing channel can be formed. The medical air purifying sterilizer has the advantages that bacteria, viruses, formaldehyde, benzene and ozone concentration do not exceed standards, pollution of PM2.5 particles do not exist, the sterilizing cost is low, and energy can be recovered.

Embodiments of the present disclosure include structures, photocatalytic structures, and photoelectrochemical structures, methods of making these structures, methods of making photocatalysis, methods of splitting H₂O, methods of splitting CO₂, and the like

The invention discloses an antibacterial plastic used for household appliances and being good in antibacterial effect and a preparation method thereof, and belongs to the technical field of macromolecular engineering plastics. The antibacterial plastic used for the household appliances is made by mainly blending 70-95 parts of resin, 2-10 parts of metal ion and photocatalyst mixed type inorganic antibacterial agents, 5-30 parts of flexibilizers, 0.1-1.5 parts of coupling agents and 0.05-0.4 part of antioxidants. The preparation method of the antibacterial plastic comprises evenly mixing various raw materials, and obtaining the antibacterial plastic used for the household appliances by blending at a temperature range of 170-240 DEG C. The antibacterial performance of the antibacterial plastic can meet the national newly-issued standard GB21551.2-2010 and can be widely applied to refrigerators, washing machines, air conditioners, televisions, cell phones and computer products.

A photocatalysis process manual light emitting toothbrush comprising a handle with a grip at a proximal end and a replaceable brush head at a distal end thereof. The replaceable brush head has at least one group of bristles permanently affixed to the replaceable brush head and at least one blue light emitter is provided on an upper surface of the replaceable brush head for emitting blue light in a direction generally parallel to the bristles permanently affixed to the replaceable brush head. At least one blue light source is provided for radiating blue light, in a wavelength band between 420 nm to 480 nm, and a power source is provided for energizing the at least one blue light source. The blue light is at least one of modulated emission with an average optical output power level of less than 5 watts.