30results about How to "Hydroxyl-rich surface" patented technology

The invention discloses a preparation method of a cation-modified molybdenum oxide or tungsten oxide nanowire with a large specific surface area. The preparation method comprises the following steps of: dissolving inorganic cations and a molybdenum source or tungsten source in deionized water, stirring solution, simultaneously regulating the pH value of the solution to be above an isoelectric point of molybdenum oxide or tungsten oxide by using protonic acid, then transferring into a self-pressure reaction kettle, reacting for 1-30 hours at a constant temperature of 100-240 DEG C after sealing, separating out solid products after the reaction is ended, washing, and drying to obtain the cation-modified molybdenum oxide or tungsten oxide nanowire with the large specific surface area. The cation-modified molybdenum oxide or tungsten oxide nanowire has the characteristics that the diameter is small, the distribution is narrow (3-10nm), the length-diameter ratio is more than 250, the porouseffect is achieved, the specific surface area is not smaller than 200m<2> / g, the degree of crystallinity is lower and the surface hydroxyl groups are rich and the like.

The invention discloses a nanometer water treatment catalyst of holmium sodium tungstate and a preparation method thereof. The method uses ammonium metatungstate, citric acid monohydrate, holmium chloride, sodium chloride and deionized water as raw materials, and utilizes supercritical water Prepare the sodium holmium tungstate catalyst by thermal synthesis. The catalyst of the present invention is environmentally friendly, low in cost, capable of efficiently catalytically reducing water body pollutants such as p-nitrophenol, methyl orange, and methylene blue, and has the advantages of long service life, simple regeneration, and the like, and has broad market application prospects.

The invention relates to a pulse electrolysis reactor. The pulse electrolysis reactor includes an electrolysis cell body, a plurality of electrode plates and a pulse power supply, an electrolysis space is formed in the electrolysis cell body, and the plurality of electrode plates are arranged in the electrolysis space at intervals along the flow direction of sewage so that sewage overflows from the bottom of each electrode plate to the top of the electrode plate to one of the electrode plates downstream, and the pulse power supply is electrically connected to at least two of the electrode plates, so that The opposite sides of each of the electrode plates have different polarities respectively. The pulse electrolysis reactor consumes less energy and has higher efficiency. The invention also provides an industrial sewage treatment system.

The invention discloses a micro / nano cellulose fibril / polyglycolic acid film, a preparation method and application thereof. The method comprises the following steps: soaking the cellulose raw material in water, preparing a suspension, pulverizing the superfine particles of the suspension to obtain micro / nano cellulose fibrils, and preparing a dispersion; mixing the dispersion with polyglycolic acid solution Mix evenly and dry to obtain micro / nano cellulose fibrils / polyglycolic acid film. The present invention prepares micro / nano cellulose fibrils by a simple mechanical method without using chemicals such as acids or alkalis, and mixes them with polyglycolic acid solutions to prepare micro / nano cellulose fibrils / polyglycolic acid composite films. The method is simple and the process is easy to operate, and the prepared micro / nano cellulose fibril / polyglycolic acid composite film has good biodegradable characteristics and mechanical properties. The film can reduce and eliminate white pollution when applied to packaging substrate enhancement and agricultural fields, and has broad social benefits and economic values.

The invention discloses a sodium-manganese water purifying material as well as a preparation method and application thereof. The preparation method is characterized by using raw products of manganese mines as raw materials, mixing the raw products with a strong oxidant uniformly under the strongly acidic condition, then carrying out hydrothermal reaction and carrying out cooling, filtering, washing, drying and roasting, thus obtaining the granular water purifying material. The water purifying material obtained by the method has stable properties, good brittleness, nanoscale single crystals, large surface area and better adsorption and catalytic oxidation activities, is simple and convenient in process and lower in raw material cost, can not pollute the environment in the production process and is suitable for industrial production.

The invention provides a solvothermal synthesis method for a FTO conductive material. The solvothermal synthesis method comprises the following steps: dissolving a tin salt in an alcohol solvent and then adding an oxidizing agent and fluoride to prepare solvothermal mother liquor; adding elemental tin, stannous oxide or stannous hydroxide to solvothermal mother liquor, carrying out thorough mixing, and transferring all the materials into a closed pressure vessel with high corrosion resistance; heating the closed pressure vessel and performing a solvothermal reaction at 110-290 DEG C for 0.5-96hours, wherein the reaction can be completed at a single temperature at a time or be completed in stages at different temperatures; and after the solvothermal reaction is completed, cooling the obtained material to room temperature, washing the material with water, and then drying the material at 50 to 220 DEG C to obtain the FTO conductive material.

The invention discloses a high-performance triangular belt. The triangular belt comprises a strong layer, the upper portion of the strong layer is provided with a stretching layer, a compression layeris arranged at the lower portion of the strong layer, and the outer side of the stretching layer and the outer side of the compression layer are wrapped with a wrapping cloth layer. The strong layeris made of surface modified tempered monofilament. The tempered monofilament is adopted as the material of the strong layer, and stretching and other stress generated in the triangular belt running process are improved; meanwhile, the primer material formula is optimized, the physical mechanical performance and bending resisting and fatigue resisting performance of the material are improved, the triangular glue production technology is optimized and strictly controlled, the material technology efficiency is improved, and accordingly the product quality and character are improved.

The invention relates to a method for preparing ethene by catalyzing ethanol dehydration, and mainly aims to solve the problem of low activity of catalysts in prior art. The method comprises the steps of: taking an ethanol aqueous solution with a weight percent concentration of 5-100% as the raw material, at a reaction temperature of 250-500DEG C, and under the condition of a volume space velocity of 0.1-25h<-1> relative to ethanol, contacting the reaction raw material with a catalyst so as to generate ethane, with an Al2O3 nanotube with a diameter of 3-12 nanometers as the catalyst. The technical method can well solve the above problem, and can be used for ethene preparation through ethanol dehydration.

The invention relates to an adsorbent for removing heavy metals and ammonia nitrogen in waste water as well as a preparation method thereof. The invention is characterized in that the adsorbent comprises the following chemical compositions in percentage by weight: 30-80% of catalyst residues, 10-30% of an additive, and 10-40% of clay. The preparation method of the adsorbent comprises the following steps: A: the additive and the clay are added into the catalyst residues with fully and uniformly stirring, spray drying is carried out for moulding, and the median diameter of spray microballoons is 50-60[mu]m; B. the materials in the step A are calcinated for 0.5-5 hours at 500-1000 DEG C; C. water, the additive and the clay are added into the calcinated materials in the step B with fully and uniformly stirring, band extrusion or ball rolling or tabletting and other modes are carried out for moulding, drying is carried out, the drying temperature is 100-150 DEG C, the drying time is 10-24 hours, and the adsorbent is prepared. The method has the advantages of simple preparation technological processes, low cost, high-efficient removal of heavy metals and ammonia nitrogen and other poisonous and harmful pollutants in waste water, simple treatment method, wide application scope, stable effect, and wide application prospects; the method meets the green and environmental protection principles of treatment of wastes with wastes.

The invention discloses a nickel-based water treatment catalyst and its preparation method and application. The catalyst uses a mixture of alumina and titanium oxide as a carrier, nickel nanoparticles as a catalytic active component, and cerium-manganese-iron composite oxide as a catalyst. co-catalyst. Stir the co-catalyst precursor solution and the catalyst carrier evenly, stale, extrude, dry and roast, absorb the active component precursor, and then reduce it with sodium borohydride to prepare the catalyst. The catalyst is environmentally friendly, has low cost, and can efficiently catalyze and reduce water pollutants such as p-nitrophenol, methyl orange, and methylene blue.

The invention discloses a composite nanometer titanium dioxide photocatalysis material and a preparation method thereof. The method includes the steps: titanium dioxide collosol, silicon dioxide colloThe invention discloses a composite nanometer titanium dioxide photocatalysis material and a preparation method thereof. The method includes the steps: titanium dioxide collosol, silicon dioxide collove power and the hardness of a coating.ive power and the hardness of a coating.sol and propylene glycol monomethyl ether, of which the mass ratio is 1 to 4 to 10, are uniformly mixed to form composite collosol; porous ceramics are soaked in the composite collosol for 30 minutes;sol and propylene glycol monomethyl ether, of which the mass ratio is 1 to 4 to 10, are uniformly mixed to form composite collosol; porous ceramics are soaked in the composite collosol for 30 minutes; and the porous ceramics are taken out to be heated for 30 minutes at the temperature of 300 DEG C so as to obtain photocatalysis ceramics loaded titanium dioxide materials. Compared with the prior arand the porous ceramics are taken out to be heated for 30 minutes at the temperature of 300 DEG C so as to obtain photocatalysis ceramics loaded titanium dioxide materials. Compared with the prior art, the invention has the technical scheme that modified silicon dioxide collosol is mixed in the titanium dioxide collosol, and the existing Ti-O-Ti bond is replaced by a Ti-O-Si bond, thereby reducint, the invention has the technical scheme that modified silicon dioxide collosol is mixed in the titanium dioxide collosol, and the existing Ti-O-Ti bond is replaced by a Ti-O-Si bond, thereby reducing the titanium oxidation-reduction potential, enabling titanium dioxide light absorption wavelength to generate redshift, and improving the visible light utility ratio of titanium as well as the adhesg the titanium oxidation-reduction potential, enabling titanium dioxide light absorption wavelength to generate redshift, and improving the visible light utility ratio of titanium as well as the adhesi

The invention relates to a drinking water treatment method and especially relates to a method for removing fluorides in water based on complexation-condensation-adsorption combination. The method comprises the following steps of 1, transforming free fluorine in water into a fluorine complex by control of an appropriate pH value, an aluminum salt form and an aluminum salt use amount, 2, further introducing appropriate amounts of calcium hydrate and an aluminum salt to improve a pH value so that condensation is realized; active adsorption points rich in surface hydroxyl are provided; and through condensation and adsorption, fluorine (comprising the free fluorine and the fluorine complex) dissolved in the water is transformed into fluorine particles (comprising condensed fluorine and adsorbed fluorine), and 3, removing the fluorine particles in the water by a solid-liquid separation reactor so that removal of fluorine in the water is realized. The method realizes removal of fluorine in drinking water, and has water treatment capacity satisfying WHO and USEPA standards and the lasted national drinking water standard (GB5749-2006).