155results about How to "High visible light photocatalytic performance" patented technology

The invention belongs to the technical field of treatment and application of nanometer materials and industrial and agricultural wastewater, and provides a magnetic Fe3O4 / SiO2 / TiO2 / quantum dot compounded nanometer photocatalyst and a preparation method and application thereof. The preparation method comprises the following steps of: synthesizing an Fe3O4 magnetic nucleus by a coprecipitation method; preparing an SiO2 protective layer by virtue of hydrolysis reaction and polycondensation reaction of TEOS (Tetraethyl Orthosilicate); then preparing a TiO2 layer on the surface of the SiO2 protective layer by a sol-gel method; and finally modifying Fe3O4 / SiO2 / TiO2 nanoparticles by CdS and CdSe quantum dots. The obtained magnetic Fe3O4 / SiO2 / TiO2 / quantum dot compounded nanometer photocatalyst has very good visible-light photocatalytic capability, can be conveniently and fast recovered and reused by an external magnetic field, and can be used for removing organic pollutants of azo dyes contained in the industrial wastewater.

The invention provides a TiO2 catalyst with a large specific surface area and a visible-light response function and a method for preparing the TiO2 catalyst, and belongs to the technical field of photocatalysis. Ti-MOF (MIL-125 (Ti)-NH2) which is used as a self-template is sintered and synthesized in atmosphere of oxygen and hydrogen with a certain proportion (of oxygen to hydrogen of 1:5-1:10) to obtain the catalyst which is a TiO2 polyhedron with auto-doped N and a large specific surface area. The TiO2 catalyst and the method have the advantages that morphology of MOF can be effectively copied by the aid of the template method, and the specific surface area of TiO2 can be greatly increased by microporous structures and can reach 262.3 m<2> / g; MOF ligands are regulated and controlled, N, F and S elements are doped in the TiO2, and accordingly the visible-light photocatalyst performance of the TiO2 can be improved.

The invention discloses a preparation method and an application of a Cd / CdS heterojunction visible light photocatalyst rich in sulfur vacancies. The method comprises the following steps: synthesizingan intermediate CdO / CdS composite material through a thermal treatment technology by using CdS prepared by a solvothermal technology as a precursor, and performing an in-situ chemical reduction technology by using sodium borohydride to directly obtain the Cd / CdS heterojunction visible light photocatalyst. The prepared Cd / CdS composite visible light photocatalyst contains a lot of sulfur vacancies,so the absorption and the utilization of visible lights by the catalyst are greatly improved, and the contact between highly-conductive Cd and CdS is close, thereby the photogenerated electrons can be well separated from holes, and the photocatalytic efficiency is high. The heterojunction photocatalyst has a high stability, has an excellent photocatalytic activity under the irradiation of visiblelights, and can be used for catalyzing photodegradation of water to produce hydrogen. The preparation method has the advantages of low requirements of preparation conditions, simplicity in operation,cheap and easily available raw materials, environmental protection, high visible light catalysis efficiency, and broad application prospect in the photocatalysis field.

The invention discloses a preparation method of graphite type carbon nitride nanotubes. The preparation method comprises the following steps: adding melamine powder into a high temperature-resistant container, and placing the high temperature-resistant container on a vibrator for vibration treatment; then adding a cover on the high temperature-resistant container, placing the high temperature-resistant container into a program heating control device, heating to a first preset temperature at a relatively high heating rate and keeping for a period of time; further heating the program heating control device to a second preset temperature at a relatively low heating rate and keeping for a period of time; and cooling an obtained product to room temperature, and then grinding to form powder so as to obtain the graphite type carbon nitride nanotubes disclosed by the invention. In the synthesis process of the preparation method, the addition of a template or additional organic matters is not required, the preparation method has the advantages of low price, high yield, good repeatability, no impurity interference of products and the like, is simple and easy to operate, and the prepared carbon nitride nanotubes have good fluorescence performance and photocatalytic performance, and have broad application prospects in the fields of nano devices, photocatalysis and the like.

The invention discloses a method for preparing a graphite phase carbon nitride nanosheet / titania nanotube array photocatalysis material. The method comprises the following steps: step one, thermally condensing melamine to prepare graphite phase carbon nitride powder; step two, ultrasonically peeling bulk graphite phase carbon nitride to obtain a graphite phase carbon nitride nanosheet; step three, adding the carbon nitride nanosheet to electrolyte, and synthesizing graphite phase carbon nitride nanosheet / amorphous titania nanotube array by one step during anodic oxidation; step four, conducting heat treatment on a sample obtained by anodic oxidation to prepare a graphite phase carbon nitride nanosheet / titania nanotube array material. The graphite phase carbon nitride nanosheet / titania nanotube array photocatalysis material rapidly prepared by one step according to the method provided by the invention is economic and environmentally friendly; an obtained photocatalyst overcomes defects of titania nanotube array and bulk graphite phase carbon nitride, improves the utilization of visible light, reduces a recombination rate of photo-generated electron holes, and can implement the efficient photocatalytic degradation of organic pollutants under irradiation of visible light.

The invention discloses a preparation method of a nitrogen (N)-doped titanium dioxide (TiO2) porous film on the surface of a stainless steel matrix, belonging to the field of the preparation technology of photocatalytic materials. The method is characterized by a technical scheme for preparing a high film-based bonding strength anatase type N-doped TiO2 porous film on a stainless steel matrix, and comprises the following steps of: firstly preparing a Ti-N diffusion coating layer composed of a Ti-N diffusion layer in the matrix and a surface Ti-N compound film on the surface of a stainless steel workpiece by use of a double glow plasma surface alloying technology; then performing anode oxidation on the Ti-N film on the workpiece surface to generate an N-doped TiO2 porous film; and finally performing thermal treatment in the air to prepare an anatase type N-doped TiO2 porous film. By adopting the preparation method disclosed by the invention, the prepared N-doped TiO2 porous film has the advantages of large specific surface area and good film-based bonding strength, and also has visible light catalysis performance; and the stainless steel after the N-doped TiO2 surface modification can be applied to the fields of photocatalysis self-cleaning, photocatalysis sterilization and the like.

The invention relates to a method for preparing beta-Bi2O3 / TiO2-NTs composite photocatalyst with high stability visible light catalytic activity. The method is characterized in that an electrochemical anodization method is adopted; a layer of upright and orderly TiO2-NTs nanotubes are pre-grown on a Ti plate for serving as a middle layer; Bi nano-particles are subjected to pulse electrodeposition in bismuth nitrate solution; and then the mixture is finally placed in oxygen atmosphere of a tube furnace for calcining to form a beta-Bi2O3 crystal form to prepare the beta-Bi2O3 / TiO2-NTs composite photocatalyst. Compared with the conventional alpha-Bi2O3 and TiO2 photocatalysts, the visible-light response of the beta-Bi2O3 / TiO2-NTs composite photocatalyst is prolonged to 495nm. Compared with the conventional beta-Bi2O3 photocatalyst, the valence band electric potential of the beta-Bi2O3 / TiO2-NTs composite photocatalyst is increased to 2.28ev, the hole oxidative capacity is strengthened, and the stability is greatly improved.

The invention belongs to the fields of nano / micron material preparation technology and hydro-thermal synthesis technology, and particularly relates to a method for preparing a nano-sheet assembled bismuthyl bromide superstructure by adjusting and controlling a surfactant. The method comprises the following steps: using bismuth nitrate, sodium bromide or hexadecyl trimethyl ammonium bromide as a reactant, adding PEG4000 or PVP4000 as an adjusting and controlling agent, using ethanediol as a solvent, preparing a precursor solution under ultrasonic agitation, and moving the precursor solution into a hydro-thermal reaction kettle in a packing ratio of between 60 and 80 percent; putting the hydro-thermal reaction kettle filled with the mixture into a box-type resistance furnace, heating the kettle to a temperature of between 90 and 150 DEG C, keeping the temperature for 2 to 48 hours, taking the kettle out of the furnace, and cooling the kettle to the room temperature naturally; and washing and centrifugally separating the mixture in the kettle to obtain the required product. The method has the advantages of simple process, easy construction of a whole preparation system, simple and convenient operation, easily controlled condition, low cost, easily controlled product shape and size, high purity, good crystallinity and convenient processing of the product, and is suitable for large scale industrial production.

The invention relates to an SnO2-Fe2O3NTs composite electrode and a preparation method thereof. The inner layer of the electrode is an Fe base, the surface layer of the electrode is a composite layer of SnO2 and Fe2OeNTs, and the SnO2-Fe2O3NTs composite electrode is obtained through loading a tin alkoxide sol on the array surfaces of Fe-based Fe2O3NTs prepared through carrying out anodization treatment. The composite electrode prepared in the invention has the characteristics of large SnO2 load capacity, small particle diameter, tight combination with the Fe-based Fe2O3NTs skeleton, smooth and flattened electrode surfaces, strong visible light response, excellent electrocatalytic performance, high photoelectric synergetic catalysis efficiency, stable chemical performances, simple preparation technology and low manufacturing cost, can be efficiently used for the degrading treatment of dye wastewater and organic wastewater which is difficult to biochemically oxidize, and has wide economic and social benefits.

The invention belongs to the technical field of an environmental material, and particularly relates to a molybdenum and carbon-codoped titanium oxide nanotube array thin film material and a preparation method thereof. The molybdenum and carbon codoping of a titanium oxide nanotube can be realized by introducing molybdenum element into the titanium oxide nanotube formed on a titanium sheet and the surface thereof through alloying, and then introducing carbon element through carbon monoxide atmospheric thermal treatment; in the obtained molybdenum and carbon-codoped titanium oxide nanotube array thin film material, a part of titanium atoms in the titanium oxide nanotube are replaced by molybdenum, a part of oxygen atoms are replaced by carbon, the ratio of the molybdenum atoms to carbon atoms ranges from 0.03 to 0.15, and the ratio of the doped carbon atoms to titanium atoms ranges from 0.01 to 0.09. The thin film material is attached to a titanium alloy substrate, and comprises orderly titanium oxide nanotubes perpendicular to the substrate. The photocatalysis and photo-electrochemical properties of the thin film material in visible light are far higher than those of the traditional titanium oxide thin film material, and the thin film material has excellent application prospects on the aspects of photocatalytically degrading organic matters in water and reducing heavy metal ions.

The invention belongs to the technical field of novel catalytic material preparation and discloses a NiTi hydrotalcite nanosheet catalyst responding to visible light and a preparation method of the catalyst. According to the invention, NiTi hydrotalcite nanosheets are synthesized by an anti-phase microemulsion method and show excellent catalytic performance by visible light. The preparation method realizes controllability of a microemulsion environment by adjusting and controlling the proportions of a surface active agent and water; and hydrotalcite is crystallized and grows in the microemulsion and the particle size of the hydrotalcite ranges from 30 nm to 80 nm. A solvent used in the method is low in cost and simple to operate and can be recycled. The obtained hydrotalcite nanosheet catalyst has the advantages of simple synthesizing conditions, cheap raw materials and easiness in large-scale industrial production. The NiTi hydrotalcite nanosheet catalyst prepared in the invention has an excellent characteristic of responding to visible light, is five times quicker than micron-sized hydrotalcite synthetized with a traditional codeposition method in water decomposition performance by visible light, and is hopefully expected to be widely applied to the fields like solar thermal utilization, adsorption and additives.

The invention relates to a preparation method of titanous auto-doping anatase titanium dioxide monocrystalline. The method comprises the following steps of oxidation gelatinization and solvothermal of a bivalent titanium source so as to form nano-crystalline, product washing and drying based on a principle of forming nano monocrystalline by solvothermal reaction. Compared with the traditional titanous auto-doping anatase titanium dioxide monocrystalline, the titanous auto-doping anatase titanium dioxide monocrystalline obtained by the method provided by the invention is even in size distribution and does not contain other foreign elements, and the introduction of titanous defect endows a material with an excellent visible light catalytic performance. The method has the advantages of operation simplicity, mild conditions, simple technology, high titanous concentration, controllable doped concentration, high visible light absorbance and the like; the prepared titanous auto-doping anatase titanium dioxide monocrystalline has the efficiency of degrading industrial organic dye methylthionine chloride under visible light better than that of P25, and has a wide application prospect in the fields of industrial waste water treatment by inorganic catalysts and the like.

The invention provides a flower-shaped composite visible light catalyst Ag3PO4 / MoS2 and a preparation method thereof; the catalyst is formed by in-situ growth of Ag3PO4 nanospheres on the surface of flower-shaped MoS2; the particle size of the Ag3PO4 nanospheres is 80-200 nm. Firstly, the flower-shaped MoS2 is hydrothermally synthesized through a template method, then the Ag3PO4 nanospheres are grown on the surface of the flower-shaped MoS2 in situ, and thus the Ag3PO4 / MoS2 composite visible light catalyst is prepared; the preparation method is simple in steps, easy to control, and favorable to industrialized production. The Ag3PO4 / MoS2 composite visible light catalyst has excellent visible light catalytic property, is good in stability, and can be used repeatedly. Through introduction of the flower-shaped MoS2, the visible light catalytic degradation effect of Ag3PO4 on a rhodamine B organic dye is increased by 50% or more.

The invention belongs to the field of new materials, and relates to a zinc tungstate / bismuth oxyiodide heterojunction visible light photocatalysis material and a fabrication method thereof. The photocatalysis material comprises zinc tungstate and bismuth oxyiodide, wherein the mol ratio of bismuth oxyiodide is 25%-50%. The fabrication method comprises the steps of dissolving zinc acetate and sodium wolframate in deionized water, adding a sodium tungstate solution into a zinc acetate solution to obtain a zinc tungstate nanorod, dissolving potassium iodide in the deionized water, adding bismuth nitrate, adding the prepared zinc tungstate nanorod into a mixed solution, and finally obtaining the zinc tungstate / bismuth oxyiodide heterojunction photocatalysis material. The method can be conducted at room temperature and under normal pressure, is low in cost, simple in process, and suitable for large-scale production, and has important potential application in industrial production. The prepared zinc tungstate / bismuth oxyiodide heterojunction photocatalysis material can better response to visible light, and shows an excellent visible light photocatalysis performance.

The invention specifically discloses a method for rapidly preparing a BiFeO3 / g-C3N4 heterojunction photocatalyst. The catalyst has excellent catalytic performance under visible light, and can be applied to the field of environmental treatment such as sewage treatment and the like. According to the method, preparation is carried out by adopting a two-step method, and the two-step method comprises that firstly, g-C3N4 powder is obtained by adopting a method of calcining melamine at a high temperature, and BiFeO3 powder is prepared by adopting a high-temperature hydrothermal method; and then, theBiFeO3 / g-C3N4 heterojunction photocatalyst is prepared by using a wet chemical method. When an organic dye methyl orange (MO) solution is degraded under the irradiation of visible light, the catalystshows relatively good photocatalytic activity. The method provided by the invention has the advantages of low preparation cost, simple process, excellent catalytic performance and the like.

The invention relates to a preparation method of an adsorbing visible light catalytic material used for air pollution management. Particularly, coal gangues, asphalt powder and tourmalines are used as raw materials to prepare an active carbon-zeolite compound with perpetual negative charges, and the active carbon-zeolite compound is used as a carrier of a WO3 / TiO2 catalyst to be synthesized into the adsorbing visible light catalytic material. In the composite material, the tourmalines naturally carry the perpetual negative charges, and PM2.5 with positive charges in the air can be continuously and efficiently adsorbed; the active carbon-zeolite compound generated by the coal gangues has the super-large specific surface area, and also has the hydrophily of zeolite and the lyophobic property of active carbon, so that the active carbon-zeolite compound has good specific adsorption property on polar pollutants in the air and lyophobic VOCs substances and the like; and the adsorbed pollutants can be degraded and removed by the WO3 / TiO2 catalyst under the illumination of sunlight. The product can be used for the technical field of an outer wall coating and keeps self-clean after being washed by rainwater, so that the continuous efficient purification on the pullulated air is realized.

The invention discloses a preparation method of a MoS2 / Ag2S nano-composite photocatalytic material. Molybdenum disulphide, silver nitrate (AgNO3) and polyvinylpyrrolidone (PVP) as raw materials are prepared into a MoS2 / Ag2S nano photocatalytic material by a liquid phase precipitation method. The preparation method of the MoS2 / Ag2S composite photocatalytic material provided by the invention has the advantages of simple operation, high yield, and good reproducibility and dispersion. The nano material as a photocatalyst has excellent catalytic properties.

The invention relates to a method for preparing a hierarchical structure bismuth oxybromide hollow microsphere photocatalysis material, comprising the steps of: respectively dissolving bismuth nitrate and brominated 1-cetyl-3-methylimidazole methylimidazole in ethylene glycol monobutyl ether, mixing the two solutions, and placing the mixed solution in an enclosed autoclave to react at the temperature of 140-180 DEG C for 0.5-12 hours. The preparation method provided by the invention can be carried out under the hydro-thermal condition, has advantages of low cost as well as simple and maneuverable equipment, can be applied in batch production, and has an important potential application value in industrial production. The prepared hierarchical structure bismuth oxybromide hollow microspherephotocatalysis material can markedly improve the separation of photocarrier and has high photocatalysis performance.

The invention relates to a cerium, nitrogen and fluoride co-doped titanium dioxide photocatalyst and the application thereof in degrading organic pollutants in visible light. The invention adopts the technical scheme that: butyl titanate is stirred and slowly dripped into the mixed solution of ethanol and glacial acetic acid; after the mixed solution is stirred uniformly, hydrofluoric acid solution is added drip by drip and stirred, and transparent mixed solution A is formed; ammonia and the ethanol are mixed, cerium nitrate is added in, the pH value is regulated to be 2, and solution B is prepared; the solution B is slowly dripped into the solution A, and uniform and transparent sol is obtained; the sol stays and is aged in the air, and solid gel is obtained; and the solid gel is dried and ground into powder, put into a Francesca furnace to be roasted for 40min to 1.5h at 400DEG C to 500DEG C, and the cerium, nitrogen and fluoride co-doped titanium dioxide photocatalyst is prepared. The photocatalyst and the application thereof improve the utilization rate of titanium dioxide (TiO2) to solar energy, and improve the visible light catalysis activity. Under the action of visible light, the photocatalyst and the application thereof have good degradation effect to the organic pollutants.

The invention relates to a method for preparing a nitrogen-doped titanium dioxide photocatalyst through electron beam irradiation. The method comprises the following steps: preparing titanium dioxide by adopting a current known technology, adding titanium dioxide powder into a urea solution, and stirring the mixture at the room temperature for 24 hours; placing a suspension into an electron beam generating device to allow the suspension to undergo a certain dose of electron beam irradiation, wherein the radiation dose is 70-280kGy; and centrifugally separating the radiated suspension, and washing and drying an obtained solid sample to obtain the nitrogen-doped titanium dioxide photocatalyst finally. As proved by detection, the obtained nitrogen-doped titanium dioxide photocatalyst has high visible-light catalytic activity. Moreover, X-ray photoelectric spectroscopy (XPS) detection shows that nitrogen elements replace oxygen lattices and are doped into the titanium dioxide, and the doping amount is 7.41 percent.

The invention discloses a PETG / dendritic phthalocyanine-loaded SiO2 composite wire with a photocatalytic effect, and a preparation method thereof. According to the present invention, the PETG / dendritic phthalocyanine-loaded SiO2 composite wire with the photocatalytic effect, and the preparation method thereof are provided by using the high light-transmitting resin PETG as the carrier; the technical scheme comprises that the components of the formula comprise, by mass, 50-70 parts of PETG, 10-30 parts of PVA, 5-20 parts of 1-3 generation aryl ether dendritic phthalocyanine coordination compoundloaded SiO2, 3-10 parts of a plasticizer, 2-5 parts of a stanilizer, and 0.5-2 parts of a dispersant, and the preparation method comprises: drying, weighing, mixing, carrying out melt extrusion granulation, and carrying out extrusion shaping winding; the prepared PETG / dendritic phthalocyanine-loaded SiO2 composite wire has good light transmittance and good visible light photocatalytic performance; the preparation method is simple and efficient; and the the prepared PETG / dendritic phthalocyanine-loaded SiO2 composite wire can be used for the photocatalytic degradation treatment of organic pollutants in sewage, air and soil.

The invention discloses a preparation method and application of a NiCd double non-noble metal modified CdS visible light catalyst. CdS prepared by a solvothermal method is used as a precursor, an intermediate CdO / CdS composite material is synthesized by a heat treatment method, Cd / CdS is obtained by in-situ chemical reduction of sodium borohydride, and then the NiCd co-modified CdS visible light catalyst is obtained through a photodeposition method. Compared with the single CdS or single metal modified CdS, the NiCd / CdS composite visible light catalyst greatly improves the absorption and utilization of visible light and realizes very close contact between NiCd bimetal and CdS, the photoelectrons are well separated from holes, the photocatalytic efficiency is higher and the stability is higher. The NiCd double non-noble metal modified CdS visible light catalyst can be used for photocatalytic decomposition of water into hydrogen. The preparation method has low preparation condition requirements, is easy to operate, utilizes cheap and easily available raw materials, is environmentally friendly and has a wide application prospect.

The invention discloses a method for preparing a stainless steel wire loaded with a bismuth oxide nanosheet photocatalyst through a solvothermal method. Bismuth nitrate, ethylene glycol and acetone are used as raw materials, the stainless steel wire is used as a carrier, the hydrothermal reaction temperature and the hydrothermal reaction temperature time are controlled for a solvothermal reaction,after the reaction is completed, the stainless steel wire is taken out, and after cleaning, the stainless steel wire loaded with a Bi2O3 nanosheet photocatalytic material is prepared through drying treatment at 80-90 DEG C for 12-24 h. According to the method, the technology is simple, the preparation technology of the stainless steel wire loaded with the Bi2O3 nanosheet photocatalytic material is effectively optimized, and the prepared product is good in performance and can be used as a photocatalytic material.

The invention relates to a preparation method and application of a photocatalyst, copper calcium titanate containing high-density oxygen vacancy. The preparation method includes: utilizing a one-step molten salt method; controlling morphology and oxygen vacancy content by changing molten salt composition during synthesis; using metal oxide as a raw material; grinding and calcining the raw material to form a high-purity photocatalyst; calcining before washing the high-purity photocatalyst. The preparation method has the advantages of few raw material type, simple operation, adjustable molten salt composition, mild condition and simple process. A copper calcium titanate photocatalysis material obtained by the preparation method is high in yield, uniform in distribution and free of introduction of other mixed elements; by introducing oxygen vacancy, compositing of photo-induced electron hole pairs can be inhibited effectively, and the material is endowed with excellent visible light photocatalysis performance and is better than a commercial star photocatalysis material, titanium dioxide (P25). The defect that visible light cannot be used due to wide oxide band gap is overcome, and the defect that sulfide is unstable is made up due to the characteristic that the catalyst is of a diamond-like structure.

The invention provides a method for preparing a nanorod-shaped high bismuth oxyiodide photocatalyst. The method comprises the following steps: ultrasonically dispersing bismuth nitrate pentahydrate inethanol or water, adding a potassium iodide solution into a suspension, magnetically stirring to obtain the suspension, then controlling the pH of the suspension to be 11-14 by a sodium hydroxide solution, performing a magnetic stirring reaction to obtain Bi5O7I, and filtering, washing and drying the obtained product to obtain the rod-shaped Bi5O7I. The rod-shaped Bi5O7I prepared with a chemicalprecipitation method under normal-temperature and normal-pressure conditions has the characteristics of uniform morphology, large specific surface area and strong stability. The nanorod-shaped high bismuth oxyiodide photocatalyst can effectively remove elemental mercury from flue gas in a power plant through photocatalytic oxidation, the mercury removing efficiency under irradiation of an LED lampcan reach 50%, and the efficiency is obviously higher than that of the conventional TiO2 (17%) photocatalytic material. A synthesis method is simple, low in cost and low in pollution, needs of national sustainable development are met, and the synthesis method is a novel environment-friendly preparation method.

The invention discloses a visible light photo-catalytic air purifying filter which comprises an air inlet and an air outlet, wherein a front de-dusting module, an air filtering module, an air blower and a rear de-dusting module are successively arranged between the air inlet and the air outlet; the air filtering module comprises an LED (Light Emitting Diode) lamp and a plurality of graphene fiber layers; visible light photo-catalytic coatings are loaded on the graphene fiber layers. After the visible light photo-catalytic nanometer materials are loaded onto the graphene fibers according to the invention, the air purifying filter has an excellent absorbing function and an excellent visible light photo-catalytic property. When the circulating air passes by the graphene fibers coated with the visible light photo-catalytic nanometer materials, the absorbing function is utilized to absorb and capture the toxic harmful gases in air, and then the captured toxic harmful gases are continuously decomposed into harmless CO2 and H2O under the effect of visible light; the visible light photo-catalytic air purifying filter has the characteristics of automatic removal for the surface air pollutants and self-cleaning function; due to the excellent air purifying effect, the visible light photo-catalytic air purifying filter can be used in a submarine cabin.

The preparation process of efficient visible light photocatalyst and photoelectric converting and luminescent material TiOxNyCz with the material including titanium tetrachloride as main material, water, methanol and urea in the weight ratio of 1 to 0-10 to 1-50 to 2-50 includes the following steps: adding water and methanol into titanium tetrachloride, heating to boil, adding urea while stirring, cooling to cure, and igniting at 200-1000 deg.c to obtain the target product with composition depending on the igniting temperature. Thus prepared doped titanium dioxide material has excellent visible light photocatalyzing performance, and high photoluminescence performance. The sample with igniting temperature below 400 deg.c has excellent photocatalyzing performance under sunlight and fluorescent lamp light, methyl orange degrading rate up to 99.8 %, continuous lightning in 330-500 nm, and high sunlight utilization.

The invention relates to an aminated graphene oxide and graphite phase carbon nitride composite modified film material and a preparation method and application thereof. The composite modified film material comprises a polysulfone original film, SL g-C3N4 / NGO heterojunctions uniformly distributed on the polysulfone original film in the form of a layer-by-layer laminated structure and a polyamide skin layer compounded on the surface of the polysulfone original film. The composite modified film material adopts NGO and SL g-C3N4 as modifiers. Both of the NGO and the SL g-C3N4 are combined to modify the surface of the polysulfone original film and form the layer-by-layer laminated structure. Then the polyamide skin layer is compounded on the polysulfone original film to form a compact SL g-C3N4 / NGO / polyamide composite structure layer on the surface of the polysulfone original film. The compact SL g-C3N4 / NGO / polyamide composite structure layer improves the hydrophilicity of the surface ofthe film, reduces the forbidden band value of a functional layer of the film, and has excellent visible light catalytic capability and organic matter catalytic degradation capability; the film flux isgreatly improved, the anti-pollution capability is obviously improved, and the cost is low.

The invention relates to a preparation method of porous materials, in particular to a preparation method and application of an organic-inorganic hybrid material with mesoporous structure. The porous material with mesoporous structure is titanium dioxide material of bisphosphonates hybrid of various organic phosphoric acid groups in framework; wherein, the weight percentage of the organic phosphoric P is 7-10.5wt%. The material is synthesized directly through the method of hydrothermal synthesis and can be used in the photocatalytic degradation of organic dye molecules under ultraviolet and visible light and heavy metal ion adsorption, having excellent effect; the product has strong preferential absorption capacity, especially for Cd (II) ion. The preparation method has the advantages of simple equipment, mild synthesis conditions and easily available raw materials; therefore, the preparation method is suitable for industrial mass production.