73 results about "Chlorine doping" patented technology

The invention provides a preparation and an application of a nitrogen, sulphur or chlorine-doped three-dimensional porous graphene catalyst. The preparation comprises the following steps: dissolving graphene oxide, an alkyl compound, a transition metal salt containing nitrogen, sulphur or chlorine and hydrochloric acid into a solvent, and carrying out ultrasonic treatment and drying to obtain a precursor; heating the precursor to 600-1,000 DEG C under inert gas protection and carrying out roasting reduction treatment for 1-3 hours to obtain primary carbide; carrying out pickling treatment on the obtained primary carbide with a mixed solution of hydrofluoric acid and hydrochloric acid at a room temperature for 12-24 hours, centrifuging the primary carbide, cleaning the primary carbide with deionized water and then drying the primary carbide to obtain the three-dimensional porous graphene material containing nitrogen, sulphur or chlorine; and heating the three-dimensional porous graphene material to 600-1,000 DEG C under inert gas protection, and carrying out roasting reduction treatment for 1-3 hours to obtain the nitrogen, sulphur or chlorine-doped three-dimensional porous graphene catalyst. The nitrogen, sulphur or chlorine-doped three-dimensional porous graphene catalyst has the characteristics of being high in stability, not easy to poison and the like, and has a good application prospect in the fields of wastewater treatment of a fuel cell, a metal-air cell, a super capacitor, an energy storage battery and a microbial fuel cell and the like.

The present invention relates to a low attenuation single-mode optical fiber and a preparation method thereof. The low attenuation single-mode optical fiber comprises a core layer and a cladding layer. The low attenuation single-mode optical fiber is characterized in that the radius r1 of the core layer is 3.5 to 4.0 micrometers, the relative refractive index difference Delta1 of the core layer is 0.33%to 0.36%, an inner cladding layer and an outer cladding layer are orderly coated from inside to outside outside the core layer, the radius r2 of the inner cladding layer is 12 to 14 micrometers, the relative refractive index difference Delta2 of the inner cladding layer is 0.01%to 0.01%, the radius r3 of the outer cladding layer is 62 to 63 micrometers, and the outer cladding layer is a pure silica glass layer. A core rod is manufactured through VAD process, the glass core rod with a germanium and chlorine doped core layer and a fluorine and chlorine doped inner cladding layer is obtained, the core rod is sleeved in a pure silica outer sleeve tube, or the outer cladding layer is deposited outside the core rod through OVD process, a prefabricated rod for drawing can be obtained, and the prefabricated rod is drawn in a drawing speed of 1500 to 3300 m/min to form an optical fiber. According to the low attenuation single-mode optical fiber and the preparation method, through doping chlorine, a core layer germanium doping amount is reduced and core layer and cladding layer viscosity matching is improved to realize the low attenuation of the optical fiber, and optical fiber preparation process is simple, the production cost is low, the process is stable, and the qualified rate of output is high.

The invention relates to a photocatalyst, especially to a supermolecular pre-assembled carbon nitride nanotube photocatalyst and a preparation method thereof, belonging to the technical field of preparation methods for photocatalysis materials. The preparation method comprises the following steps: preparing a rod-like supermolecular intermediate with a structured morphology by using a low-temperature hydrothermal process; and carrying out calcining in a tubular furnace so as to obtain a chlorine-doped carbon nitride nanotube with a good morphology. The preparation method overcomes the problemsof low visible light utilization rate, low degradation efficiency of high-concentration organic dyes and the like of conventional photocatalysts in virtue of the characteristics of the tubular structure of the chlorine-doped carbon nitride nanotube and changes in an energy band structure caused by introduction of elemental chlorine.

The invention relates to a chlorine-doped modified lithium ion battery lithium-rich cathode material and a preparation method thereof and belongs to the field of lithium ion batteries. The cathode material is Li[Li0.2Ni(0.2-0.5b+0.5a)CobMn(0.6-0.5b-0.5a)]O(2-a)Cl(a), wherein a is more than 0 and not more than 0.1, and b is not less than 0 and not more than 0.13; and lithium salt, nickel salt, manganese salt, cobalt salt, lithium chloride and a combustion improver are ground into fine powder, a solvent is added and then uniformly mixed, and the lithium ion battery lithium-rich cathode material is obtained by firing. The lithium ion battery lithium-rich cathode material is high in discharge specific capacity, high in cycle stability, high in magnification performance and compatible in high-temperature performance and low-temperature performance, and can meet requirements of a power battery. The chloride salt for doping is rich in source, low in cost, environment-friendly, simple and practicable in synthesis process, low in manufacturing cost, convenient for large-scale industrial production and high in practicability.

The invention discloses a method for manufacturing a semiconductor device. The method comprises the following steps of: firstly, forming a contact hole etching stop layer which is prepared from boron-doped amorphous carbon, fluorine-doped amorphous carbon, chlorine-doped amorphous carbon or amorphous carbon; secondly, depositing a medium layer on the contact hole etching stop layer, and etching the medium layer and stopping etching on the upper surface of the contact hole etching stop layer to form a groove; and finally, incinerating the contact hole etching stop layer in the groove to form a contact hole. By the method, the damage to the semiconductor device in the process of etching the contact hole can be avoided.

The invention discloses a method for testing the iodide ion diffusion coefficient of concrete, which comprises the following steps: soaking the treated concrete test block in an aqueous solution of sodium iodide for not less than 30 days; The iodide ion deposition amount of each layer was obtained by chemical analysis of the powder sample; the iodide ion diffusion coefficient was calculated by nonlinear fitting of Fick's second diffusion equation with the obtained iodide ion deposition amount data of each layer. The present invention uses iodide ions instead of chloride ions as penetrating ions when measuring the diffusion coefficient of chlorine ions, studies the penetration process and combination mechanism of iodide ions in concrete structures, and compares them with the diffusion process and combination of chloride ions to establish iodine ions. The ion natural diffusion experiment method calculates the iodine ion diffusion coefficient and then converts it into the chloride ion diffusion coefficient, thereby solving the problem of the permeability coefficient of the internal chloride ion concrete structure.

The invention belongs to the technical field of medical biomaterials, and discloses a nano-structure polypyrrole/biotin composite material based on a conductive base material, a preparation method and application. The preparation method for the nano-structure polypyrrole/biotin composite material based on the conductive base material comprises the steps that firstly, the chlorine-doped polypyrrole is electro-deposited on the surface of the conductive base material by adopting chronoamperometry; then a three-electrode mode is selected, conductive metal is a counter electrode, the conductive base material with the polypyrrole deposited on the surface is a working electrode, an electrolyte is a buffer solution containing pyrrole and biotin, and chronopotentiometry is adopted so as to obtain the nano-structure polypyrrole/biotin composite material based on the conductive base material; when the buffer solution is neutral, a nano-cone-structure polypyrrole/biotin material is deposited on the surface of the working electrode; and when the buffer solution is acidic or alkaline, a nano-particle-structure polypyrrole/biotin material is deposited on the surface of the working electrode. The preparation method is simple, the cost is low, the nano structure of the prepared composite material is stable, and the preparation method can be used for preparing materials for efficiently capturing and releasing circulating tumor cancer cells.

The invention discloses a preparation method of a chlorine-doped multilayer graphene film, relates to a preparation method of a semiconductor type chlorine-doped graphene film, and especially relates to a preparation method of a chlorine-doped multilayer graphene film with good photoelectric performance, obtained by preparing a solution by use of a simple-process liquid-phase chemical reaction, then performing spin coating and then performing high-temperature annealing processing by use of cheap glycol and sulfuric acid as raw materials. The preparation method of the chlorine-doped multilayer graphene film is characterized in that the chlorine-doped graphene film is generated at a time by performing spin coating and annealing on a solution generated through a reaction by use of glycol and hydrochloric acid according to a certain mol ratio and the method comprises three steps, i.e., the liquid-phase chemical reaction, the spin coating and the annealing. According to the preparation method of the semiconductor type chlorine-doped graphene film, through a chlorine doping mode, the energy grade of the graphene film is modulated, the performance of the graphene film is effectively changed, the chlorine-doped graphene film prepared by use of the method is enabled to have better photoelectric and luminescence modulation performance, and the method can be applied to the field of a photoelectric detector.

The invention discloses a chlorine-doped graphene and a preparation method and an application thereof in preparation of an oxygen reduction electrode. The preparation method of the chlorine-doped graphene comprises the following steps of: refluxing methyl chloride at 65-160 DEG C for 10-30 minutes to obtain a methyl chloride reflux, combusting a magnesium rod in air and rapidly placing in the methyl chloride reflux, and filtering after reaction, so as to obtain a filter cake; flushing the filter cake with absolute ethyl alcohol, and carrying out centrifugal separation to obtain sediment a; adding the sediment a in hydrochloric acid, stirring completely for 10-30 minutes, and carrying out centrifugal separation to obtain sediment b, washing the sediment b successively with purified water and absolute ethyl alcohol, carrying out centrifugal separation on the washing liquid to obtain sediment c, and carrying out freeze drying on the sediment c to obtain the chlorine-doped graphene. The chlorine-doped graphene is high in catalytic activity, and the oxygen reduction catalytic activity and stability are obviously improved. The method is simple in process, convenient to operate, short in reaction time and low in equipment request, and is easy to implement.

The invention particularly relates to a doped coated modified lithium nickel cobalt aluminate cathode material and a preparation method thereof. A lithium nickel-cobalt aluminate cathode material doped with coating modification comprises a chlorine-doped lithium nickel-cobalt oxide core and a coating layer; The coating consists of polyaniline and Li4Ti5O_12. The chemical composition of Cl-doped lithium nickel cobalt oxide core is LiNi 1-X-YCoyAlxClzO2-0.5z, where 0.030 <= x <= 0. 050, 0.100 <= y <= 0. 150, 0.005 <= z <= 0. 0075. The invention uses doping and coating means to modify the lithiumnickel cobalt aluminate material at the same time, and starts from the inside and outside of the material, not only improves the internal crystal structure, but also improves the corrosion of the side reaction of the electrolyte, and on the premise of not significantly affecting the capacity of the lithium nickel cobalt aluminate cathode material, effectively improves the cycling stability of thematerial.

A chlorine-doped tin oxide particle exhibits peaks at at least 108±5 cm⁻¹, 122±5 cm⁻¹, and 133±5 cm⁻¹ in Raman spectroscopy. The chlorine-doped tin oxide particle preferably has an additional Raman spectral peak at 337±10 cm⁻¹. The chlorine-doped tin oxide particle preferably has a specific surface area of 10 to 300 m2/g. The chlorine-doped tin oxide particle preferably has an average primary particle size of 3 to 200 nm. The chlorine-doped tin oxide particle is preferably substantially free of oxygen deficiency.

The invention discloses a preparation method for a chlorine doped titanium dioxide photocatalyst. The method comprises the following steps: (1) mixing titanium dioxide powder, sodium chloride and absolute ethyl alcohol and ball-milling, thereby acquiring wet powder, wherein the mass ratio of titanium dioxide powder to sodium chloride is (2.6-3):1, and (2) drying the wet powder and calcining for 5-7 hours under the condition of 600-800 DEG C. The spherical titanium dioxide crystal particle acquired according to the invention is in uniform size. The degradation rate of the chlorine doped titanium dioxide to ciprofloxacin wastewater is above 87%.

The invention specifically discloses a high-stability ultralow-mercury catalyst, and a preparation method and application thereof, belonging to the field of catalysts. The preparation method for the ultralow-mercury catalyst comprises the following steps: mixing and molding carbon powder, sucralose and metal nitrate to obtain chlorine-doped defective activated carbon which is used as a carrier, and then loading mercury chloride on the carrier. The prepared ultralow-mercury catalyst is reduced in the content of mercury chloride and improved in catalytic performance and stability. The inventionalso discloses the application of the above ultralow-mercury catalyst to the preparation of vinyl chloride by using a calcium carbide method. The catalyst shows strong catalytic performance and stability in the process of catalytic preparation of vinyl chloride; and the conversion ratio of acetylene is 97.2% or above, the selectivity of vinyl chloride is 99.5% or above, and the loss rate of mercury chloride is less than 3.0%.

The invention relates to an application of a chlorine-doped polymer matrix composite to a chloride-ion battery cathode material. The mass of a chlorine-doped polymer in the chlorine-doped polymer matrix composite is 50%-100% of that of the polymer matrix composite, and the mass of a carbon material is 0-50% of that of the polymer matrix composite. With the adoption of the chlorine-doped polymer matrix composite, the problem of desolvation of a chloride-ion battery metal chloride cathode material and the problem of larger volume change of the metal chloride cathode material in charging and discharging processes can be solved, the cyclic stability of the chloride-ion battery cathode material can be remarkably improved, and the chlorine-doped polymer matrix composite play an important role in promoting development of high-stability chloride-ion batteries.

The invention relates to an ultralow-attenuation large-effective-area single-mode optical fiber. The optical fiber comprises a core layer and a cladding layer, the cable is characterized in that the radius r1 of the core layer is 8-10 [mu] m; the relative refractive index delta n1 of the core layer is-0.10% to 0.20%; the core layer is sequentially coated with an inner cladding layer, a sunken inner cladding layer and an outer cladding layer from inside to outside; the radius r2 of the inner cladding is 11-15 [mu] m; wherein the radius r3 of the sunken inner cladding ranges from 16 microns to 50 microns, the relative refractive index delta n3 of the sunken inner cladding ranges from-0.30% to-0.70%, the outer cladding is a full fluorine-doped silicon dioxide glass layer, and the relative refractive index delta n4 of the sunken inner cladding ranges from-0.15% to-0.60%. According to the specific viscosity matching design, the core layer is a non-pure silicon core and has the characteristic of co-doping of germanium and fluorine, and meanwhile, a chlorine doping process is carried out, so that the viscosity of the optical fiber is reduced, the structural relaxation of glass is accelerated, the viscosity of each part of the optical fiber and the stress of the optical fiber are optimized, and the single-mode optical fiber performance with large effective area and ultralow attenuationis realized.

The preparation process of chlorine doped metal oxide catalyst includes the following steps: dissolving metal oxide precursor and chlorine dopant in certain ratio in water to obtain mixture solution; adding dispersant in 0-3 times the molar amount of metal oxide precursor and chlorine dopant into the solution to obtain gel precursor solution; soaking catalyst carrier in 1-100 times the weight of metal oxide precursor and chlorine dopant inside the gel precursor solution and drying to obtain catalyst precursor; and calcining in air atmosphere at 100-800 deg c to obtain the chlorine doped metal oxide catalyst. The chlorine doped metal oxide catalyst has very high mercury catalytically oxidizing capacity, and has simple preparation process and industrial application foreground.

An optical fiber includes (i) a chlorine doped silica based core having a core alpha (Core alpha) >=4, a radius r1, and a maximum refractive index delta 1max % and (ii) a cladding surrounding the core. The cladding surrounding the core includes a) a first inner cladding region adjacent to and in contact with the core and having a refractive index delta 2, a radius r2, and a minimum refractive index delta 2min such that delta 2min < delta 1max, b) a second inner cladding adjacent to and in contact with the first inner cladding having a refractive index delta 3, a radius r3, and a minimum refractive index delta 3min such that 3min < delta 2, and c) an outer cladding region surrounding the second inner cladding region and having a refractive index delta5, a radius rmax, and a minimum refractive index delta 3min such that delta 3min < delta 2.