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1073 results about "Phosphate ion" patented technology

Novel visible catalyst-silver phosphate and preparation method thereof

The present invention provides a novel visible catalyst-silver phosphate and a preparation method thereof, solving the problems of wide TiO2 forbidden band, no absorbability of visible weakness, and the like in the prior art and applying Ag3PO4 to the field of photocatalysis for the first time. In the invention, a silver ammonia solution for replacing a silver nitrate solution is used as a silversource, the reaction of silver ions and phosphate ions is slowed, and then the catalyst is obtained and has the effect of high-efficiency photocatalytic degradation. The preparing method of the invention is simple and is favorable to extensive popularization.
Owner:FUZHOU UNIV

Preparation method of grapheme/hydroxyapatite composite material

A preparation method of a grapheme/hydroxyapatite composite material comprises the following steps: uniformly mixing oxidized grapheme with the concentration of 0.5-5 mg/ml and a solution or a turbid liquid with the calcium ion concentration of 0.01-3.0 mol/L to obtain a first mixed solution; adding a solution I with the phosphate anion concentration of 0.01-2.0 mol/L to the first mixed solution according to the molar ratio of calcium to phosphorus is (1.5-2.0) to 1, and uniformly mixing the solution I and the first mixed solution under the action of magnetic mixing; adjusting the pH to be 8-14 through a pH adjusting agent to obtain a second mixed solution; transferring the second mixed solution to a reaction kettle; carrying out hydro-thermal treatment for 1-12 hours at the temperature of 160-240 DEG C; cooling the second mixed solution until the temperature of the second mixed solution is the room temperature; cleaning, freezing and drying to obtain the grapheme/hydroxyapatite composite material. The preparation method is environment-friendly, simple and beneficial to large-scale production. The prepared grapheme/hydroxyapatite composite material has the advantages of good mechanical property as well as high electrical conductivity, adsorbability, biocompatibility and osteogenic activity.
Owner:SOUTHWEST JIAOTONG UNIV

Method of preparing hydroxyl apatite bioceramic film by plasma micro-arc oxidization method

The present invention relates to a process for preparing hydroxylapatite bio-ceramic membranes at titanium or titanium alloy surfaces by utilizing differential arc oxidation process. Firstly, preparing electrolytic solution A by using calcium ion salts and phosphate radical ion-containing salts, or preparing electrolytic solution B by adding metal silver ions to the electrolytic solution A; or preparing electrolytic solution C by adding metal silicon ions to the electrolytic solution A; and then, selecting titanium or titanium alloy as anodes and putting them respectively into the electrolytic solution A, B and C, selecting the non-corrodible steel container for containing the electrolytic solutions as cathodes, controlling conditions such as impulse electrical source positive phase voltage, frequency for differential arc oxidation of titanium or titanium alloy, then hydroxylapatite bio-ceramic membrane layers possessing different performances are prepared. Said titanium based bio-ceramic compound material prepared according to said process possesses not only intensity and toughness of metals but also biological activity of hydroxylapatites, and is capable of being applied in the fields such as jackstraw chirurgery implantation body and tooth planting body.
Owner:QINGDAO UNIV OF SCI & TECH

Sewage treatment method for simultaneously removing phosphor and nitrogen in process of reinforcing autotrophic denitrification of sulfur

The invention discloses a sewage treatment method for simultaneously removing phosphor and nitrogen in a process of reinforcing autotrophic denitrification of sulfur and belongs to the technical field of sewage treatment. According to the method, pyrite, sulfur and siderite are adopted for strengthening a denitrification process of the wastewater and the effect of simultaneously removing phosphor and nitrogen is promoted. According to the method, pyrite and sulfur are used as sulfur sources and siderite is used as a carob source in a reaction system. The synergistic effect of the pyrite and sulfur can strengthen the utilization of the thalli for the siderite, so that the denitrification capacity can be reinforced. The ferric and ferrous ions, which are released by pyrite and siderite, and phosphate radical ions can form the ferric phosphate sediment, so that the dephosphorization capacity is reinforced. The method has an excellent effect, is low in cost and is suitable for engineering application.
Owner:NANJING UNIV

Method for improving electrochemical performance of high-nickel ternary positive electrode material of lithium ion battery

The invention relates to a method for improving electrochemical performance of a high-nickel ternary positive electrode material of a lithium ion battery, and belongs to the preparation field of the lithium ion positive electrode material. Phosphate, used as a phosphate ion source, is mixed with a high-nickel ternary precursor in a liquid phase, and then the mixed material is dried in a vacuum drying oven to prepare the high-nickel ternary precursor with a phosphate coating layer on the surface; and next, the high-nickel ternary precursor with the phosphate coating layer and a lithium source are subjected to mixing and calcining. In the process of the high-nickel ternary precursor, a layer of compact Li<3>PO<4> is generated on the surface of the electrode material, and the high-nickel ternary material coated with Li<3>PO<4> on the surface is obtained through a one-step calcining method; compared with an un-coated material, the coated and modified electrode material can reach about 225mAh.g<-1> in initial cycle discharge specific capacity and 2.7-4.3V in charging cut-off voltage at 1C, 5C or 10C; and compared with the un-coated material, the discharge specific capacity of the coated and modified electrode material is improved, so that the rate capability of the high-nickel ternary positive electrode material is improved.
Owner:BEIJING INSTITUTE OF TECHNOLOGYGY

Apparatus and method for removing phosphor and organic matter in sewage water with electric flocculation membrane bioreactor

The invention relates to a device and a method which are used for removing phosphor and organic matter in an electric flocculation film bioreactor, and belongs to the wastewater treatment field. The device uses the combination technology of the electric flocculation and the film bioreactor, that is, an iron plate or an aluminium plate is adopted to be used as an anode electrode, a plate electrode is electrolyzed to generate iron ions or aluminium ions which are combined with hydroxyl ions and phosphate radical ions in wastewater to form a flocculation body. The organic matter is degraded by microorganism in the film bioreactor to form mud, and the contamination is removed by the filtering of a micro filter membrane component, thereby the purpose of removing the phosphor and the organic matter from the wastewater is achieved. The device has the advantages of simple structure, no chemical agent put, simple operation and management, easy realization of automatic control, as well as good and stable yielding water quality, and is particularly suitable for departments, organizations, schools, building sites and subdistricts in areas lacking of water; the yielding water can be directly used as gray water, reuse water and landscape water.
Owner:TSINGHUA UNIV

Agricultural and forestry waste carbon-based slow release filter and preparation method thereof

The invention discloses an agricultural and forestry waste carbon-based slow release filter and a preparation method thereof. The preparation method comprises the following steps: crushing agricultural and forestry waste into biomass particles, carrying out pyrolysis to prepare charcoal, dissolving monoammonium phosphate and monopotassium phosphate in water to prepare a saturated water solution of monoammonium phosphate and a saturated water solution of monopotassium phosphate, soaking charcoal prepared in step a in the saturated water solution of monoammonium phosphate and the saturated water solution of monopotassium phosphate so that adsorption capacity of charcoal to phosphate radical ions, ammonium ions and potassium ions is up to 80-90% of balanced adsorption capacity, then taking out charcoal, and drying at the drying temperature of 100-105 DEG C until the moisture content of the slow release filter is less than 5%, thus the agricultural and forestry waste carbon-based slow release filter is obtained. The agricultural and forestry waste carbon-based slow release filter disclosed by the invention is low in cost, long in slow release time and good in slow release effect, can be used for long term and can maintain soil fertility for a long time.
Owner:GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI

Method for preparing hydroxyapatite-natural macromolecular nano compound with one-pot method

The invention discloses a method for preparing a hydroxyapatite-natural macromolecular nano compound with a one-pot method. The method disclosed by the invention has the core characteristics that raw material powder is directly added, and mainly comprises the following steps: adding calcium salt and phosphate into a natural macromolecular solution according to the amount of substance ratio of Ca/P of 5 to 3; adjusting the pH of the system to 10 to 12 by using an alkali solution, wherein calcium ions, phosphate ions and hydroxyl ions in the system and natural macromolecules have an in-situ co-precipitation reaction; washing a reaction product to be neutral, and drying to obtain the hydroxyapatite-natural macromolecular nano compound; grinding and sieving to prepare nano composite particle products with different specifications. The method disclosed by the invention is simple and has moderate reaction conditions and small energy consumption; the obtained hydroxyapatite-natural macromolecular nano compound has good granularity, rigidity, microscopic appearance and crystallinity, and can be widely applied to the fields of bone defect repairing tissue engineering materials and medical equipment and the like of dental department, orthopedic surgery and the like.
Owner:HUBEI SAILUO BIOLOGICAL MATERIAL CO LTD
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