480results about How to "Improve redox ability" patented technology

The invention relates to denitrition catalyst with a mercury removal effect. The catalyst has a chemical general formula of: MXn-V2O5-Y/TiO2, wherein, M is a metallic element selected from Fe, Cu, Mn or Co, X is halogen Cl or Br, Y is WO3 or MoO3, and n=2-4, and the elements are in a weight ratio of: 1-10 of M, 1-1.5 of V, 7.5-8.5 of W or Mo, and 75-100 of TiO2. The catalyst is prepared by the steps of: dipping V2O5-WO3/TiO2 or V2O5-MoO3/TiO2 with MCln or MBrn, then conducting frying and calcination. With the catalyst of the invention, catalytic reduction of NOx and catalytic oxidation of Hg<0> can be simultaneously completed in an original flue gas denitrition catalytic reactor, and the generated divalent mercury ions are washed and cured in desulfurized gypsum in a subsequent flue gas wet desulphurization process. Thus, cooperative control of the discharge of NOx and Hg<0> can be realized without increasing flue gas purification facilities of coal-fired power plants.

The present invention relates to a synthetic method of graphitic carbon nitride material. The method involves a homogenous mixing of carbon nitride precursor and ammonium salt, and calcining the mixture to obtain a porous graphitic carbon nitride material. Wherein, the ammonium salt is any one or a combination of at least two which could release gaseous NH₃ during thermolysis. The present invention uses thermolabile ammonium salt as a pore former; the thermolysis of ammonium salt could release soft gas bubbles during the calcination; the later burst of bubbles leads to the formation of nanoporous structure. The proposed method is template-free and environmentally-friendly, and the resultant material exhibits high photocatalytic activity in the field of gas and water decontamination.

The invention relates to a fresh-keeping packaging material and products thereof, belonging to the technical field of packaging. The invention has the technical scheme that a certain proportion of mineral micropowder of kieselguhr or sepiolite or medical stone or bentonite or tephros or perlite and the like is doped into plastics of PE, PP, PVC and the like and paper pulp, and then the mixture is made into thin films, packaging paper or packaging bags or packaging boxes or packaging cases, trays and the like; the characteristics of dispersity, air permeability, adsorbability, far infrared ray and positive and negative ion function and the like of the mineral micropowder are utilized to enable the packaging material to generate micropores, and therefore, the packaging material has a certain air permeability and adsorbability or generates positive and negative ions or far infrared rays; gas and a small quantity of moisture which are generated from packaged articles are discharged from the micropores, and harmful gas is absorbed and transferred, and thereby, the heat value of the packaged articles can be effectively lowered; microbes are killed or restrained, thereby meeting the demands of keeping fresh of live and fresh food and prolonging storage life.

A method for regenerating an inactivation SCR denitration catalyst of coal-fired power plants by an antitoxic renewable liquid includes: S1 air purging the catalyst with oil-free dry compressed air for 10-30 minutes; S2 impregnating in a cleaning fluid for ultrasonic processing for 10-30 min and drying at 80-110 DEG C for 60-180 min; S3 impregnating in the antitoxic renewable liquid for 60-80 min, drying at 80-110 DEG C for 60-180 min for at least twice; S4 discharging for 30 minutes under the atmosphere of 25 ml/min oxygen under 45 kV voltage in dielectric barrier discharge reaction gas; and S5 roasting for 3-12h at 300-500 DEG C. After the regeneration, the activity of the catalyst is recovered by more than 90%, the catalyst mechanical properties and antitoxic performance are effectively improved, and the service life is prolonged.

The disclosure provides a double-layer anode structure on a pretreated porous metal substrate and a method for fabricating the same, for improving the redox stability and decreasing the anode polarization resistance of a SOFC. The anode structure comprises: a porous metal substrate of high gas permeability; a first porous anode functional layer, formed on the porous metal substrate by a high-voltage high-enthalpy Ar—He—H₂—N₂ atmospheric-pressure plasma spraying process; and a second porous anode functional layer, formed on the first porous anode functional layer by a high-voltage high-enthalpy Ar—He—H₂—N₂ atmospheric-pressure plasma spraying and hydrogen reduction. The first porous anode functional layer is composed a redox stable perovskite, the second porous anode functional layer is composed of a nanostructured cermet. The first porous anode functional layer is also used to prevent the second porous anode functional layer from being diffused by the composition elements of the porous metal substrate.

The invention provides a graphene modified composite mesoporous carbon microsphere air purifying preparation. A certain amount of beta-cyclodextrin is added to thin-layered nano-SiO2 particles covering the surfaces of obtained micro-SiO2 particles, a certain quantity of obtained RGO/TiO2 nanoparticles is added simultaneously, -OH, -COOH, C-O-C and C=O oxygen-containing functional groups rich on the surface of graphene are adsorbed by and bonded with the RGO/TiO2 nanoparticles on the basis of the molecular recognition characteristic of beta-cyclodextrin, then a certain amount of CTAB (cetyltrimethylammonium bromide) surfactant is added, CTAB serving as a micelle stabilizer can stop the RGO/TiO2 nanoparticles from further hydrolysis and growth, and finally, the novel air purifying preparation adopting RGO/TiO2 supported by carbon microspheres with a mesoporous shell structure is obtained. With adoption of the scheme, the purity is high, RGO/TiO2 supported by the carbon microspheres with the mesoporous shell structure in powder is better in bonding performance, uniform in distribution and controllable in dimension at mesopores, and the air purifying preparation can be used for purifying polluted air and removing dust in a haze environment as well as photo-catalytically degrading and separating nitric oxide, sulfide or other organic pollutants in the polluted air.

The invention discloses a monatomic noble metal catalyst, as well as a preparation method and application thereof in low-temperature catalytic-oxidizing formaldehyde. The monatomic noble metal catalyst comprises a carrier and noble metal dispersed in the surface of the carrier in a monatomic way, wherein the dispersity of the noble metal in the catalyst can reach to the monoatomic dispersion level, and the noble metal and the catalyst carrier have strong interaction; an oxidation-reduction ability, an oxygen adsorption and desorption performance, a formaldehyde activation capacity and other performances of the catalyst are remarkably improved; compared with a manganese dioxide material noble metal catalyst without noble metal, the purification performance on formaldehyde with different concentrations is remarkably improved. The preparation method is fast and simple in preparation process, cost-saving, and capable of realizing monoatomic dispersion of the noble metal in the carrier surface; according to the noble metal catalyst with monoatomic dispersion prepared by adopting the method, the dispersity of the noble metal is improved, the use cost of the noble metal is reduced, and meanwhile, the catalyst is ensured to have sufficient and high-efficient purification capacity on the gas-state formaldehyde.

The invention belongs to the technical field of material preparation and photocatalysis, and discloses a high-activity graphite-phase carbon nitride material and a preparation method thereof. The preparation method comprises the following steps: forming a self-generated gas atmosphere a gas generated from a precursor by pyrolysis in the high-temperature calcining process under the control on an inert gas, and guiding synthesis of a carbon nitride material, thereby obtaining a flaky porous graphite-phase carbon nitride material. According to the preparation method, after the inert gas is not introduced any longer, a self-generated gas generated from the precursor is relatively uniform at different parts, and the carbon nitride material prepared with the preparation method is uniform in morphology and relatively good in crystal form; due to the escape of the self-generated gas, the material is effectively pored, and thus the specific surface area and the active sites of the material are increased; due to the self-generated gas atmosphere, the polymerization degree of the precursor is reduced, and the obtained carbon nitride material has a relatively large amount of unpolymerized amino or imino groups. The preparation method disclosed by the invention is simple, efficient and low in cost, and the carbon nitride material prepared with the preparation method is excellent in photocatalysis activity and very good in practicability.

The invention relates to the field of materials, in particular to adsorption and photocatalytic materials that can be used for waste gas and wastewater treatment, and in particular to a titanium dioxide nanocatalyst, its preparation method and application, the method comprising the following steps: mixing a titanium dioxide precursor and a solvent to adjust pH, carry out microwave irradiation reaction at a temperature of 50-120° C. and normal pressure, and then obtain a titanium dioxide nano-catalyst after cooling, washing, drying and calcining. The method of the present invention does not require any template additives or auxiliary agents, is simple, efficient, and environmentally friendly; the titanium dioxide nano-catalyst prepared by the present invention has active photocatalytic activity, and the degradation rate of methylene blue is more than 1 times higher than that of commercial P25. And it can be well applied in the field of environmental pollution control.

The invention belongs to the field of environmental catalysis, and discloses a photocatalyst for efficiently degrading tetracycline under visible light and a preparation method and application of thephotocatalyst. The preparation method of the photocatalyst comprises the following steps: mixing a nitrogen-containing compound in water, carrying out hydrothermal treatment, cooling, transferring into a culture dish, and carrying out freeze drying treatment to obtain a precursor; and putting the precursor into a closed environment for high-temperature roasting, and naturally cooling to obtain thegraphite-phase carbon nitride photocatalyst for efficiently degrading tetracycline under visible light. According to the preparation method, the raw materials are mixed for hydro-thermal treatment and freeze-drying treatment to obtain the precursor, the graphite-phase carbon nitride obtained through constant-temperature roasting under different conditions has a relatively high specific surface area, and the separation of photo-induced electrons and holes can be effectively promoted through the formation of material defects; therefore, the purpose of efficiently degrading 10 mg/L tetracyclinehydrochloride under visible light is achieved.

The invention discloses a two-dimensional anatase TiO2/g-C3N4 composite material. The material is a two-dimensional lamellar structure, and is obtained by compounding g-C3N4 and a TiO2 precursor through a surfactant. The composite material has a thickness of 2 to 20nm, a lateral dimension of 100nm to 2[mu]m and a specific surface area of 88 to 110m<2>*g<-1>. According to the composite material, an ethylene glycol modified Ti-O hydrate-surfactant-g-C3N4 sandwich structure is assembled under hydrophobic and hydrophilic actions, oxygen vacancies in TiO2(B) are supplied by air calcination, and the two-dimensional anatase TiO2/g-C3N4 composite material is finally obtained to realize close and homogeneous compounding of two ultrathin nanosheets, so that a large-area heterogenous interface is formed, the electron transport rate is increased and light-generated electron home recombination is suppressed; the composite material has very high photocatalytic hydrogen production performance and photocatalytic organic matter degradation activity.

The invention discloses a double-treatment cleaning and regenerating method for a vanadium-titanium based denitration catalyst and aims to solve the technical problem that the regenerating effect of the traditional vanadium-titanium based denitration catalyst is not so good. According to the technical scheme, the double-treatment cleaning and regenerating method comprises the following steps of: introducing air-ozone mixed gas into a catalyst regenerating reactor, and carrying out oxidation treatment to obtain a regenerated vanadium-titanium based denitration catalyst; then, placing the regenerated vanadium-titanium based denitration catalyst into a catalyst activity liquid, dipping the regenerated vanadium-titanium based denitration catalyst for 4-6h, then, taking out the regenerated vanadium-titanium based denitration catalyst, drying the regenerated vanadium-titanium based denitration catalyst in dry air at 50-60 DEG C for 1-3h, and then, repeating the operation once; and then, roasting the regenerated vanadium-titanium based denitration catalyst at the temperature of 160-200 DEG C for 1-3h, and then, roasting the regenerated vanadium-titanium based denitration catalyst at the temperature of 300-400 DEG C for 1-3h to obtain the cleaned and regenerated vanadium-titanium based denitration catalyst. The double-treatment cleaning and regenerating method has the beneficial effects that the denitration ratio of the regenerated vanadium-titanium based denitration catalyst can be up to 87%, so that efficient regeneration is realized, meanwhile, the conversion ratio of SO2/SO3 is effectively reduced, and the denitration cost is greatly reduced.

The invention discloses a cadmium-arsenic composite polluted soil remediation agent, which comprises the following raw materials in parts by weight: 0-10 parts of hematite; 20-30 parts of ferrous sulfate; 10 parts of manganese dioxide; 15-20 parts of fly ash; 10-15 parts of quicklime; 10-15 parts of sepiolite; 10-15 parts of calcium dihydrogen phosphate; and 0-10 parts of wollastonite. The remediation agent enables cadmium and arsenic heavy metals to form stable chemical forms through oxidation reduction, adsorption, ion exchange, precipitation or coprecipitation and the like to reduce the migration and diffusion capability of the cadmium and arsenic heavy metals in the environment, so that the ecological environment risk of the cadmium and arsenic heavy metals is reduced; and the remediation agent has the advantages of high remediation efficiency for cadmium-arsenic composite polluted soil, short remediation period, low remediation cost, easily available raw material components and simple application method, so that the agent is one of the few remediation agents in the industry that simultaneously act on yin and yang heavy metal ions.

The invention relates to a preparation method for a microbial organic soil bactericidal and insecticidal warming conditioning agent. Fermentation raw materials are domestic fungus cultivation residue substances, the fermentation raw materials are crushed and added with water, and thus the water content mass percent of the fermentation raw materials is 25-35%; decomposing inoculants are added at a mass ratio of1:1000, the mixture is mixed uniformly, the fermentation raw materials mixed with strains are added with tourmaline powder with a mass percent of 5%, rare earth negative ion powder with a mass percent of 2%, composite biological insecticides accounting for 1% of the finished product total mass and composite biological bactericides accounting for 1% of the finished product total mass, the mixture is mixed uniformly, then loose packing or granulation is carried out, drying is carried out and the water content is 10%; packaging is carried out, and a microbial organic soil bactericidal and insecticidal warming conditioning agent is prepared. The produced conditioning agent is advantageous in that the organic matter content is high, the ground temperature is raised, absorption of phosphor and potassium for crops can be raised, the conditioning agent has functions of preventing soil borne diseases, releasing phosphorus and potassium, fixing nitrogen and killing nematodes and green environmental protection is achieved.

The invention provides a method for treating organic wastewater by use of ferric oxychloride to catalyze and activate mono-persulfate. The method comprises the following steps: adding ferric oxychloride FeOCl in the organic wastewater, carrying out adsorption reaction to obtain a mixture; and adding mono-persulfate in the mixture, wherein the mono-persulfate is catalyzed and activated by ferric oxychloride to produce free sulfate radical so as to degrade the organic wastewater. Mono-persulfate is used as an oxidizing agent, and a ferric oxychloride catalyst is used for catalyzing and activating mono-persulfate, and then treating the organic wastewater, the effect of degrading the pollutants in the organic wastewater is obvious, the defects that the hydroxyl free radical has high environment requirement and needs to oxidize the pollutants under the acidic condition in the prior art are solved. The organic pollutant degradation efficiency of the method disclosed by the invention in the wastewater is high under the acidic condition, the neutral condition and the alkaline condition.

The invention discloses an environment-friendly latex paint and a preparation method thereof, and relates to the technical field of latex paint. The latex paint is prepared from the following raw materials in parts by weight: 85-105 parts of styrene-acrylic emulsion, 35-45 parts of nano-silica sol, 20-25 parts of diatom ooze, 10-15 parts of nano-TiO2, 10-15 parts of tourmaline anion powder, 10-15parts of glutinous rice glue, 7-8 parts of plant dehydrated filaments, 7-8 parts of antibacterial powder, 4-6 parts of active powder, 4-6 parts of essential oil components, 20-22 parts of an aid and 70-75 parts of deionized water. The latex paint has relatively powerful adhesive force, a paint film has light smell, low VOC and high adhesive force and is combined with the wall stably, peeling and bursting of the paint surface are not easily produced, and weather resistance of the latex paint is greatly improved.

The invention discloses an anion sleeping-promoting health-care pillow core. The pillow core is prepared by the following steps of: uniformly mixing 3-10 mu m tourmaline and serpentine with 10-20 mu m yew, lavender and junci medulla to obtain an anion additive; uniformly stirring 5-10wt% of adhesive agent, 12-25wt% of anion additive and the balance being deionized water to obtain an anion preparation; and adding a swelling agent, a true silk softener and the anion preparation to silk floss, drying and curing to obtain silk floss filler, and finally adding the silk floss filler to a spectrum fiber pillow core housing, wherein the spectrum fiber used in the spectrum fiber pillow core housing can be prepared by a coating process or a spinning process. According to the invention, the preparation process is simple and has wide application range; and the prepared pillow core has the functions of alleviating fatigue, soothing the nerves, promoting sleeping and releasing anions to promote human metabolism and improve immune function, and has far infrared radiation capability and the efficacies of resisting bacteria, inhibiting bacteria, deodorizing and the like.

The invention relates to silver-ion antibacterial plastic, which consists of the following raw materials by weight percent: 80 percent of plastic, 5 percent of nano silver powder, 7 percent of flame retardant agent, 5 percent of bond and 3 percent of lubricant. The silver-ion antibacterial plastic can realize the broad-spectrum antibacterial and has a flame retardant effect.

The invention discloses a preparation method of a two-dimensional ultrathin bismuth oxyhalide solid solution nanosheet photocatalyst and belongs to the technical field of photocatalysis. The method comprises the steps as follows: inorganic bismuth salt and a dispersant are added to deionized water, a structure-directing agent is added, the mixture is stirred, and a solution A is formed; halide isdissolved in deionized water and dropwise added to the solution A, the mixture is stirred continuously and poured into a hydrothermal synthesis reaction kettle to react, cooling, centrifugal separation, precipitation, water washing and drying are performed, and the ultrathin bismuth oxyhalide solid solution nanosheet photocatalyst is obtained. The preparation method has the advantages as follows:the thickness of the formed bismuth oxyhalide solid solution nanosheet is regulated by the added structure-directing agent and dispersant, the ultrathin bismuth oxyhalide solid solution nanosheet is synthesized with a hydrothermal method, the photocatalytic activity is further improved, and the prepared ultrathin bismuth oxyhalide solid solution photocatalyst has efficient visible-light catalyticactivity. The method has mild reaction conditions, required equipment is simple, required agents are low in price, safe and non-toxic, and the method is suitable for mass production.

The invention specifically relates to a flat-plate type sulfur-resistant low-temperature SCR denitration catalyst and a preparation method thereof, belonging to the fields of environmental protection and environmental catalysis. The method comprises the following steps: with nanometer composite oxide Ce-ZrO2 as a carrier, manganese oxide as an active component and iron oxide and molybdenum oxide as cocatalysts, carrying out equivalent-volume impregnation, drying, roasting and crushing so as to prepare a powdery catalyst; and subjecting the prepared powdery catalyst to acidification by sulfuric acid and then carrying out mixing, rolling coating, fold pressing, shearing, drying and roasting so as to obtain the flat-plate type sulfur-resistant low-temperature SCR denitration catalyst. The prepared catalyst has denitration activity of 85 to 98% in a temperature range of 80 to 150 DEG C and has excellent resistance to sulfur dioxide poisoning.

The invention relates to a method for efficiently removing organic pollutants in industrial wastewater. The method comprises the following operations: introducing a gas mixture of O2 and O3 into an ozone contactor by adopting a bottom microporous aeration manner; while the gas mixture is introduced, injecting a to-be-treated water body into the ozone contactor, wherein hydraulic retention time is 10 to 20min, and outputting the water body immediately; in the hydraulic retention time, firstly energizing two ends of a negative electrode and two ends of a positive electrode, located at the bottom part of the ozone contactor, by direct current, and after energizing, irradiating the water body by ultraviolet in the remaining hydraulic retention time. According to the method provided by the invention, ultraviolet irradiation, ozonation and an electrochemical method are combined, and reasonable limiting is performed through the time of the ultraviolet irradiation, the ozonation and the electrochemical method to participate in reaction and concrete parameters, therefore the synergistic effect of all factors is realized; while the degradation rate of the organic pollutants in the water body is increased, the mineralization rate of the water body is obviously increased; the oxidation-reduction ability is high; organic carbon sources are not needed, so that the energy consumption is low.