15 results about "Platinum" patented technology

The invention provides a CDs-Pt nanomaterial with catalase catalytic properties. The CDs-Pt nanomaterial shows good enzyme-like catalytic activity in an acetate buffer solution using TMB as a substrate. The CDs-Pt nanomaterial provided by the invention belongs to the field of catalytic material and mimic enzyme research, and the obtained CDs-Pt nanomaterial has the characteristics that carbon quantum dots are modified by precious metal platinum, the synthetic steps are simple, the material scale is small, and the CDs-Pt nanomaterial has good dispersion in a reaction system, and has broad prospect in actual application such as hydrogen peroxide detection and glucose detection.

The invention relates to the field of materials, in particular to preparation of a disordered porous silicon dioxide material and application of fatty alcohol-polyoxyethylene ether to preparation of the disordered porous silicon dioxide material. The fatty alcohol-polyoxyethylene ether has the structural formula RO-(CH2CH2O)n-H, wherein R is C8-24 and n is 9 to 30. The fatty alcohol-polyoxyethylene ether serves as an additive for preparation of the disordered porous silicon dioxide material. Compared with the material prepared by the conventional method, the disordered porous silicon dioxide material has extremely high monodispersity and uniform and adjustable size. The preparation process is simple, short in cycle, easy in large-scale production and wide in application field. In addition, contents such as nanogold, platinum, luminous quantum dots or magnetic particles and the like can be embedded in advance or introduced after the material is prepared and the surface functional group can be modified, so that the using filed is further enlarged.

A monitor for monitoring the concentration of oxygen in a fuel or in an ullage over a fuel comprises (i) a sensing element comprising a luminescent substance comprising a luminophore and a support in which the luminophore is covalently bound to the support, (ii) a light source arranged to irradiate the sensing element with light, and (iii) a photosensor arranged to detect light emitted from the luminescent substance. The luminescent substance may be, for example, a platinum porphyrin covalently bound to silica.

The invention discloses a photosensitive chitosan derivative/precious metal nanoparticle/carbon material composite functional coating layer and a production method thereof. The method comprises the following steps: synthesizing a photosensitive chitosan derivative; and preparing a carbon material/nanometer gold, silver and platinum composite material by adopting the photosensitive chitosan derivative as a bridge, processing the composite material to prepare a solution, and producing the functional coating layer on an electrode, glass, an iron plate, an aluminum plate and other base materials. The photosensitive chitosan/carbon material/precious metal nanoparticle composite material prepared in the invention can form a uniform and stable dispersion liquid, the production method has the characteristics of simple operation, easy control and mild reaction conditions, and the coating layer produced by using the composite material has good biocompatibility, conductivity and bacterialness, and can be applied to the field of sensors.

The invention discloses a composite cathode of a microbial fuel cell and a preparation method thereof. The composite cathode in turn comprises a catalytic layer, a carbon cloth layer, a carbon base layer and a diffusion layer from one side to the other side; and the material of the catalytic layer is a mixture of a graphene oxide / magnesium oxide composite material, activated carbon and perfluorinated sulfonic acid. The composite cathode of the microbial fuel cell is prepared from the magnesium oxide / graphene oxide composite material. Compared with noble metal platinum and alloy materials thereof, the raw materials of the composite cathode of the microbial fuel cell are wide in source and low in price, and the prepared composite cathode has a large surface area, excellent conductivity and stable electronic migration, can be used in microbial fuel cells, has low cost, stable operation and high output power, and can be widely used in the microbial fuel cells, lithium batteries or super capacitors.

The invention belongs to the technical field of aviation, and relates to a heating device special for an aircraft oil tank. Currently, most of existing heating devices are each of an insertion type structure, as aviation lubrication oil belongs to combustible liquid, the existing heating devices make direct contact with the lubrication oil, and fire risks are caused. The heating device isolates aheating assembly and the lubrication oil and then conducts heating through the thermal radiation principle. Heating is conducted on the outer side of the oil tank. The heating device comprises a controller and a shell component installed on the outer surface of the oil tank; a plurality of heating pieces are arranged on the outer surface of the shell component; the shell component is made of aluminum alloy materials; and a platinum resistor and a temperature relay can effectively ensure the effect that the heating device always keeps working within the safe temperature range. Efficient transferring of heat energy of the heating device is ensured, the heating device can be independently used or multiple heating devices are used at the same time according to the heating requirements, the structure is simple, dismounting is convenient, and interchangeability is good.

A method for concentrating platinum and palladium from platinum-palladium flotation concentrates is composed of the following steps of adding sulfur of which the mass accounts for 0.2%-10% of the platinum-palladium flotation concentrates according to the mass ratio (1:3-9) of the platinum-palladium flotation concentrate to sulfuric acid solutions with the concentration of 150-250 g/L; leaching for1-5h under the oxygen partial pressure of 0.5-1.0 MPa, at the leaching temperature of 120-160 DEG C, pH of less than 0.5, and the stirring speed of 400-600 r/min; after leaching, maintaining the original stirring speed, cooling to 108-114 DEG C at the rate of 0.2-0.5 DEG C/min, and holding for 1-3h; continuously cooling to room temperature at the rate of 0.4-1.0 DEG C/min and the stirring speed of 150-300 r/min; and filtering to obtain leachate and leaching residues, and screening the leaching residues with a 100-mesh screen to obtain platinum-palladium concentrates and tailings. The method is simple in operation, and the purposes of concentrating precious metal including platinum and palladium as well as three-phase separation of base metal including copper, nickel, zinc, iron and silicate tailings are achieved synchronously; and the content and enrichment ratio of the precious metal in the platinum-palladium concentrates are high, and the subsequent separation cost is reduced obviously.

Fire ion detector (ZVD) is made of natural quartz, rare earth, yttrium, iridium, ruthenium, calcium, zirconium, iridium, titanium, nickel, palladium, platinum, manganese, etc. detectors of different specifications. A is the tube wall, A1, A2, G is the electrode coating, A3 is the electronic chamber particle and electronic area; B is the temperature sensor; C is the quartz body; D is the air duct; E is the insulation layer; F is the heating resistance layer ; G electron oscillation area; G1 jet port electron emission area; LI, L2 are heating power supply terminals; M is constant temperature electronic block; H1, H3 are signal output terminals; H2 polarized pole; J is air inlet; Composition, stable work and high precision. It can detect trace amounts of hydrogen and organic gases, etc., and the detection limit can be as low as 0.1ppb. It is suitable for the analysis of environmental protection, gas, chemical, nuclear energy and other industries. The detector does not need combustion gas and combustion-supporting gas, and the carrier gas can be nitrogen or inert gas.

The invention provides a preparation method of a platinum-doped tungsten oxide catalyst with rich oxygen vacancies and for electrolysis of water. The platinum-doped tungsten oxide catalyst is preparedfrom the following raw materials: AgNO<3>, cis-Pt(NH<3>)<2>Cl<2> and Na<2>WO<4> in a molar ratio of 2: 1: 1. The preparation method comprises the following steps: dissolving AgNO<3>, cis-Pt(NH<3>)<2>Cl<2> and Na<2>WO<4> with water, then adjusting the pH value of the formed solution to 3.6-3.8 with hydrochloric acid, and carrying out a stirring reaction to generate a yellow precipitate; filteringthe yellow precipitate, and crystallizing a filtrate in the dark to obtain a colorless crystal; and placing the crystal in a high-temperature tubular furnace, and carrying out calcining in an Ar atmosphere to obtain the platinum-doped tungsten oxide catalyst with rich oxygen vacancies. The catalyst has excellent ability in catalyzing electrolysis of water and is good in stability.

The invention provides a preparation method of a platinum sheet target material. The preparation method comprises the following steps: (1) carrying out heat preservation on a platinum ingot at 1050-1150 DEG C for 0.8-1.5 hours, and then carrying out first rolling to obtain a platinum sheet with the thickness of 2-3 mm, specifically, the first rolling comprises multiple circulating rolling A, the number of rolling passes of the circulating rolling A is 8-12, the rolling amount of each pass of the circular rolling A is 2.0 to 3.0 mm, and heat preservation is conducted at the temperature of 1050-1150 DEG C after each circular rolling A is completed; (2) carrying out annealing treatment on the platinum sheet treated in step (1), specifically, the annealing treatment mode is that the platinum sheet treated in step (1) is sintered to be red through open fire and then cooled; and (3) carrying out second rolling on the platinum sheet treated in step (2) to obtain a platinum sheet with the thickness of 0.07-0.10 mm, specifically, the rolling amount of each pass of the second rolling is 0.10 to 0.30 mm. The thickness of the platinum sheet target material prepared by the preparation method of the platinum sheet target material is smaller and more uniform, the cracking rate is lower, and the rate of finished products is high.

The invention relates to a fuel cell anode catalyst and a preparation method thereof, and belongs to the technical field of fuel cells. The battery anode catalyst is prepared by the following steps: step A1, preparing porous microspheres; a2, immersing the porous microspheres into the graphene-grafted suspension solution, carrying out ultrasonic dispersion for 30-50min, and then carrying out spray drying to obtain composite microspheres; step A3, immersing the composite microspheres into a platinum-containing precursor solution, adding a reducing agent while stirring, heating to 40-100 DEG C, and stirring to react for 12-24 hours to obtain a reaction solution; and spraying and drying the reaction liquid, and sintering in a reducing gas atmosphere to obtain the fuel cell anode catalyst. The anode catalyst is a spherical supported catalyst, a carrier is a multi-layer porous spherical body (porous spherical carbon with cores and a nitrogen-doped graphene layer wrapped on a spherical outer layer), a supported phase is platinum, and the anode catalyst has the characteristics of poisoning resistance, high catalytic activity and good stability.

The invention discloses a purification method of oxaliplatin. The final silver removal operation of oxaliplatin purification is changed into an electrolytic tank method from an original chemical method, so other halogenating reagents can be avoided, and silver ion removal effect is superior compared with other chemical removal methods. The method is simple in reaction conditions, simple, convenient and efficient to operate, safe to implement, more friendly to environment and suitable for industrial production, and meets the requirements of green chemistry and atomic economy.