33results about How to "Uniform specific surface area" patented technology

The invention belongs to the field of environmental protection materials, and specifically relates to an adsorption-type bone apatite and its preparation method and application. During the preparation, the organic matter in the animal bone is removed; the animal bone from which the organic matter has been removed is calcined to obtain the bone apatite; The phosphoric acid solution is used to chemically modify the surface of the bone apatite to obtain the adsorbed bone apatite. The adsorption-type bone apatite of the present invention can be used to adsorb heavy metal ions in industrial sewage, compared with the specific surface area before modification from 47.832 (m 2 / g) increased to 131.566(m 2 / g); in Pb 2+ When the initial concentration is 200mg / L, the removal rate can reach 98.3%. For the initial concentration of 200mg / LZn 2+ 、Cu 2+ Ions, the removal rate can reach more than 70%, and it has good ability to remove heavy metal ions. The invention solves the technical problem of insufficient bone apatite adsorption capacity in the prior art.

The invention belongs to the field of materials, and relates to vanadium trioxide nanoparticles. The vanadium trioxide nanoparticles are spheroidic, have the particle size range of 50-100 nm and have the specific surface area of 120.4+ / -0.1 square meters per gram. The invention also provides a preparation method for the vanadium trioxide nanoparticles, wherein the method includes the steps: adding commercially available vanadium pentoxide to ethylene glycol, and stirring and mixing uniformly, to form a suspension A; adding hydrochloric acid to the suspension A, to form a suspension B with the pH of about 1; heating the suspension B, and allowing to stand at room temperature and cooling, to obtain a product containing a dark blue precipitate; and carrying out centrifugal separation of the mixed solution of the product containing the deep blue precipitate, washing and drying, and thus obtaining the spheroidic nanoparticles. The vanadium oxide nanoparticles have quite high specific surface area and relatively strong structural stability, and are helpful to improve the performance of electronic materials and catalysts.

The invention relates to a preparation method of magnetic hydrogel with high adsorbability on copper ions. The preparation method comprises the following steps of: performing emulsification by taking a certain amount of emulsifiers, dispersing agents and raw materials as a system and adopting a reverse phase suspension emulsion polymerization method, wherein the raw materials comprise alpha-cyclodextrin, sodium carboxymethylcellulose and magnetic ferroferric oxide particles; transferring the system to a reactor after uniform emulsification, adding a certain amount of initiators and cross-linking agents and performing a polymerization reaction at a certain temperature; and then sequentially performing the steps of performing thermostatic reaction, removing the solvents, washing, dialyzing (7-10d) and the like to obtain the high-adsorbability magnetic hydrogel. According to the high-adsorbability magnetic hydrogel prepared by the method, the highest water-absorbing rate on distilled water can reach 8058 g / g and the highest saturated adsorbing capacity on the metal copper ions is 992 mg / g. The hydrogel has high selective adsorbability on metal ions and is suitable for removing and recycling the metal ions in the aspects of industrial waste water, agricultural chemistry and the like.

The invention relates to a zinc oxide medium and high temperature coal gas fine desulfurizer and a preparation method, belonging to the technical field of the preparation and the application of desulfurizers, in particular to the preparation and the application of zinc oxide medium and high temperature coal gas fine desulfurizers. The zinc oxide medium and high temperature coal gas fine desulfurizer is characterized by having wide sources and high price and can finely remove sulfureted hydrogen at medium and high temperature (300-550 DEG C) in the strongly reducing atmosphere. The active ingredients of the desulfurizer are uniformly distributed on a carrier surface and have the particle diameter of 10-400 nm. In the preparation method, the two steps of semicoke carrier modification and the active ingredient dipping are combined into one step, the two functions for improving the carrier hole structure and loading the components can be synchronously finished in an autoclave. The semicoke has wide sources, high price and simple preparation technique; the prepared desulfurizer can finely remove sulfureted hydrogen at medium and high temperature in the strongly reducing atmosphere, hasbetter thermal stability, and can be widely used in the field of desulfurizing and purifying the reducing chemical virgin gas which is prepared by using coal as materials.

The invention relates to a preparation method of compound powder with a tubular biochar-coated SnO<2> structure and an application of the compound powder. According to the preparation method, villus plants such as dandelion are subjected to earlier-stage alkali activation treatment at an earlier stage, so that a large quantity of oxygen-containing functional groups similar to hydroxyl and carboxyl exist inside a carbon tube. A microwave-ultraviolet-ultrasound synthetic mode is adopted, so that the adsorption of SnO<2> particles by a carbon framework can be facilitated; the problem of volume expansion of the SnO<2> in charging and discharging processes is effectively solved; and the tubular biochar-coated SnO<2> structure is obtained finally. The preparation method is simple, low in reaction temperature, short in reaction period, simple in process equipment, environmentally friendly and suitable for large-scale production, and does not need subsequent treatment.

The invention relates to a method for detecting amaranth in food by using porous graphene, belonging to the field of analytical chemistry or food safety. According to the invention, porous graphene is prepared by using a metal etching method; dispersion liquid of porous graphene is dispensed on the surface of a glassy carbon electrode so as to prepare a porous graphene modified glassy carbon electrode; and since porous graphene has a large specific surface area, high conductivity, strong adsorption capability and good mass transfer effect, the porous graphene modified glassy carbon electrode is used for detecting amaranth in food in experiments. The detection method provided by the invention has the advantages of high sensitivity, low detection limit, easiness and accurate results.

The invention discloses a water-phase preparation method of bismuth sulfide / protein composite nanospheres. Mannitol is added as a ligand, and bismuth sulfide / protein composite nanospheres are prepared for the first time in the water phase at room temperature. The bismuth sulfide prepared by the invention / Protein composite nanospheres have the characteristics of porous structure, large specific surface area, uniform shape, controllable size, and low biological toxicity. They can be used as biomedical probes and have potential application prospects in medical imaging such as CT. The invention states The method has the advantages of simple equipment, mild conditions, low energy consumption, short preparation cycle and easy realization, and is an ideal method for preparing bismuth sulfide / protein composite nanomaterials.

The invention discloses a crude benzene hydrogenation refining catalyst and a preparation method thereof. The catalyst is composed of a pre-hydrogenation catalyst and a main hydrogenation catalyst, wherein the pre-hydrogenation catalyst uses activated alumina as a carrier, and rare earth elements are added to its surface Modified, then impregnated with molybdenum and nickel solution, and activated; the main hydrogenation catalyst uses activated alumina and titanium dioxide as the carrier, adding rare earth elements to modify its surface, and then impregnated with molybdenum and cobalt solution, activated. The invention adds phosphoric acid and rare earth metals to the catalyst, which is beneficial to the dispersion of molybdenum as an active component, so that the specific surface area is larger and more uniform, and the active points are increased. And the addition of rare earth elements enhances the anti-poisoning performance and anti-carbon deposition performance of the catalyst. The addition of titanium dioxide and rare earth materials in the preparation of the catalyst carrier increases the service temperature range of the catalyst, effectively improving the shortcoming of the existing catalyst with a relatively small service temperature range.

The invention discloses a method for preparing Ir nanowires with nanoholes and the resulting materials and applications. Deionized water is used as a solvent, Ir salt is used as a precursor, and PAH (polypropylene amine hydrochloride) is used as a morphology Directing agent and surfactant, adjust the pH value of the mixed solution to 6-14, add a reducing agent, mix evenly and use a hydrothermal reaction method for one-step reduction, centrifuge, wash and dry the product to obtain Ir nanowires with nanopores . Compared with the traditional preparation method, the method is simple and quick to operate, and the prepared Ir nanowires with nanoholes have a uniform shape and are cross-linked into multi-branches, which can realize large-scale production. The Ir nanowires with nanoholes prepared by the method of the present invention have the advantages of being hollow and porous, large specific surface area, many active sites, and abundant surface defects, and have excellent electrocatalytic activity for the oxygen evolution reaction under alkaline conditions, and can be Catalyst for alkaline oxygen evolution reaction.

The invention relates to a novel lamellar molybdenum disulfide based nano immunologic adjuvant as well as a preparation method and application thereof. The immunologic adjuvant is a product obtained by modifying a molybdenum disulfide nano lamina by using CpG and PEG. The preparation method comprises: performing ultrasonic treatment on the molybdenum disulfide nano lamina; then mixing the molybdenum disulfide nano lamina with CpG and PEG, and performing temperature controlled incubation in a swing bed; and performing centrifugation to remove free CpG and PEG. The nano immunologic adjuvant provided by the invention is small in particle size, uniform in size, and large in specific area, has relatively strong near-infrared region photo-thermal conversion capability, and can improve the secretion level of immune activation related cell factors to a great extent in combination with infrared laser irradiation. Moreover, the nano immunologic adjuvant provided by the invention has relatively low cytotoxicity. The nano immunologic adjuvant provided by the invention has the advantages of low raw material cost, simple preparation process, good repeatability, stable performance and the like.