42results about How to "Many catalytic sites" patented technology

The invention relates to an enzyme pre-catalysis-magnetosonic catalytic oxidation deep treatment method for water. According to the method, waste water subjected to physicochemical and biochemical twp-grade treatment is fed into an enzyme pre-catalysis reactor, and an SKL-composite enzyme is added to catalyze reactions; then the waste water is subjected to a multiple-potential-difference multi-metal chemical catalysis reaction; hydrogen peroxide is added to perform a strong oxidation reaction; generated hydroxy free radicals (.OH) and organic pollutants are subjected to a rapid chain type reaction, and harmful compounds are oxidized into CO2, H2O or mineral salts; objectives of degrading pollutants and fully utilizing agents are achieved; solid liquid separation is performed to remove SS; and PAM is added. The method overcomes the defects that emission standards cannot be stably met, and treating costs are at an all-time high. The method overcomes the problem that a large amount of iron sludge is generated in a traditional homogeneous Fenton reaction process, reduces secondary pollution, reduces the treating cost, and achieves catalytic pollutant degradation in a condition near a neutral condition.

A loaded ultra-small Prussian blue analogue and its preparation method and application belong to the technical field of functional nanomaterials. The preparation method comprises the following steps: 1) react trivalent metal compound, divalent metal compound, first solvent, ligand and graphene, and prepare graphene-loaded ultra-small Prussian blue analogue after mixing and washing; 2) graphite The turbid liquid of the graphene-loaded ultra-small Prussian blue analogue is dispersed in the first solvent, and a reducing agent and an alkaline solution are added for a mixed reaction to obtain a graphene-loaded ultra-small Prussian blue analogue after graphene reduction. The invention can realize the synthesis of graphene-loaded ultra-small Prussian blue analogs, and can realize the synthesis of ultra-small Prussian blue analogs. The loaded ultra-small Prussian blue analogue prepared by the invention is a composite structure of the Prussian blue analogue and graphene, which can improve the electricity receiving ability of the catalyst.

The invention discloses a method for preparing a three-dimensional porous Rh-Ir alloy dendritic nanoflower, the obtained material and its application as a hydrogen evolution catalyst. The method comprises the following steps: using polyallylamine as a morphology regulator, Using rhodium salts and iridium salts as precursors, mix ethylene glycol and polyallylamine hydrochloride evenly, add rhodium and iridium precursor solutions, and obtain three-dimensional porous Rh‑Ir alloy dendrite nanoflowers through hydrothermal reduction . Compared with the traditional preparation method, the process of the present invention is simple and easy to synthesize, and deionized water can be used to remove the miscellaneous ions and excess morphology regulator in the solution, and the excess morphology regulator is a recyclable green chemical reagent. Environmentally friendly and pollution-free. The three-dimensional porous Rh-Ir alloy dendritic nanoflowers prepared by the method of the present invention have a diameter of no more than 60nm, a single appearance, high purity, large specific surface area, many active sites, good electronic conductivity, and stable structure. The hydrogen evolution exhibits excellent electrocatalytic activity.

The invention discloses a preparation method of a flexible zinc-air cell based on zeolite imidazate skeleton-67 derivative, and belongs to the technical field of the flexible energy device. The preparation method comprises the following steps: taking ZIF-67 as raw materials, annealing in the air atmosphere to prepare Co3O4 positive catalyst for a cell air electrode, assembling various flexible components to prepare the flexible zinc-air cell. By adopting the Co3O4 prepared by annealing the ZIF-67 as the positive catalyst, the ordered porous structure provides rich catalysis sites, various components of the cell are assembled as the cell after realizing the flexibility, thereby preparing the wearable flexible device. The preparation method disclosed by the invention provides theoretic basisand technical support for the actual application of the flexible zinc-air cell.

The invention belongs to the technical field of antibacterial nano materials, and particularly relates to a polymer, a preparation method thereof, and application of the polymer as a bacterium detection and antibacterial material. At present, the antibacterial nano material becomes a research hotspot in the antibacterial field due to the advantages of stability, difficulty in generating drug resistance and the like. According to the ferriporphyrin-based porous organic metal polymer provided by the invention, pyrrole and a compound BFPB are used as raw materials, so that the polymer is synthesized by a hydrothermal method, and the preparation method is simple. The polymer has good chemical and thermal stability, the 3D interconnected porous structure provides rich catalytic active sites, and the polymer has good peroxidase-like activity. Under a near-infrared illumination condition, the polymer has a killing effect on staphylococcus aureus, and the Ab2@Au@FePPOPBFPB prepared from the polymer has good specificity and sensitivity when being applied to detection of staphylococcus aureus.

The invention discloses a ferric-copper oxide as well as a preparation method and an application thereof. The ferric-copper oxide is prepared from a potassium ferricyanide solution and a copper ion solution through a reaction and heat treatment. The ferric-copper oxide has the advantages of large specific surface area, multiple catalytic sites, high catalysis efficiency and the like, has better magnetism, is easy to separate and reutilize and also has the advantages of low preparation cost, environmental friendliness and the like. The preparation method of the ferric-copper oxide has the advantages that raw materials are widely sourced, the production cost is low, the preparation process is simple, operation is simple and convenient, the energy consumption is low, no toxic or harmful substances are produced, the preparation method is environmentally friendly and the like. The ferric-copper oxide can serve as a catalyst of a Fenton-like reaction, can be used for treating antibiotic wastewater, has the advantages of being simple and convenient to operate, lower in cost, high in treatment efficiency, good in treatment effect, low in adding dosage of chemical agents, environmentally friendly and the like, the defect that iron precipitates can be produced with a conventional Fenton oxidation method can be overcome, and the ferric-copper oxide has good application prospects.

The invention discloses a method for preparing a dye-sensitized solar cell counter electrode by using a tantalum-based counter electrode catalytic material, comprising: 1) preparing a tantalum-based compound counter electrode catalytic material; 2) preparing a tantalum-based composite counter electrode catalytic material; 3 ) Using a tantalum-based compound or a tantalum-based composite material to prepare a counter electrode catalytic material slurry, coating the counter electrode catalytic material slurry on one side of the conductive glass to form a counter electrode catalytic layer film, and heat-treating the film to obtain a tantalum based counter electrode catalytic film. The counter electrode catalytic material in the method has excellent catalytic activity, electrochemical stability and photovoltaic performance, and can replace noble metal Pt electrodes and be applied to dye-sensitized solar cell devices. The synthesized counter-electrode catalytic material and the constructed counter-electrode film have low cost, simple operation, and strong compatibility with the preparation process of the photoanode. The performance of the constructed counter electrode catalyst has been greatly improved, which ensures the stability, reliability and practicality of the electrode performance, and has application and promotion value.

The invention discloses a preparation method and application of nano nickel phosphide. The preparation method comprises the following steps: dissolving an anion type surfactant, soluble nickel salt and a reducing agent into distilled water, and evenly stirring; adding simple substance phosphorus; heating to 130-170 DEG C; reacting for 6-15 hours; cooling to the room temperature, and washing for multiple times with absolute ethyl alcohol and deionized water; and drying the product to the constant weight in a vacuum drying oven at 50-60 DEG C to prepare the nano nickel phosphide. Compared with the prior art, the invention has the advantages that a simple water heating method is utilized, a phosphorus source is the simple substance phosphorus, and the temperature and time of the reaction arequite short, which is beneficial to industrial mass production. When the nano particles of the prepared nickel phosphide are used in the catalytic hydrogenation production of nitrobenzene, the hydrogenation of the nitrobenzene can be catalyzed at lower temperature and under lower pressure, the reusability is good and the industrial use value is high because of porous surface structure, large specific surface area and multiple catalytic activity points.

The invention discloses a two-dimensional Ni-Ir porous nanosheet and its preparation method and application, using nickel cyanide and iridium salt as precursors, and preparing a two-dimensional layered structure Hoffman type complex precursor through oil bath heating , and after high-temperature calcination and oxidation, a two-dimensional Ni‑Ir porous nanosheet was obtained by reduction under a specific electrochemical window. Compared with the traditional preparation method, the method of the present invention has simple process operation, can remove the miscellaneous ions in the solution by using deionized water, does not release greenhouse gas during the calcination oxidation process, and the electrochemical reduction process is clean, environment-friendly and pollution-free. The two-dimensional Ni-Ir porous nanosheet prepared by the method of the present invention has extremely high purity, has the advantages of large specific surface area, many active sites, good electronic conductivity, stable structure, etc., and exhibits excellent electrocatalytic activity for oxygen evolution.