39results about How to "Improve oxygen production performance" patented technology

The invention discloses a Co-containing 4 o 4 The preparation method and application of the cobalt-based metal-organic framework catalyst of the quasi-cubane structure, the present invention uses the triphenylamine carboxylic acid derivative L containing the azo functional group as the bridging ligand, and the Co in the transition metal salt Tm 2+ As metal nodes, Co-containing 4 o 4 The three-dimensional metal-organic framework compound Tm-L with a quasi-cubane structure, the metal-organic framework Tm-L not only simulates the natural oxygen-generating active center in structure, but also realizes the heterogeneity of homogeneous catalysts; at the same time, azotriphenylamine-derived carboxylic acid The hydrophobicity of the ligand and its relationship with Co 4 o 4 The semi-open space composed of clusters can ensure the water stability of the catalyst while enhancing the entry of water molecules and the contact with the catalytic active sites. The experiments of heterogeneous photocatalytic water splitting for oxygen and hydrogen production show that the metal-organic framework material Tm-L involved in the present invention is a good bifunctional cocatalyst and has a good application prospect in the field of photocatalytic water splitting.

The invention discloses a self-assembled tetrakis(4-carboxyphenyl)porphyrin / oxygen-doped carbon nitride nanosheet heterojunction photocatalyst and its preparation method and application. The photocatalyst is composed of self-assembled tetrakis(4-carboxyphenyl) Base) porphyrin (SA‑TCPP) and oxygen-doped carbon nitride nanosheets (O‑CN) are composited by electrostatic interaction and π‑π interaction, where the mass ratio of O‑CN to SA‑TCPP ranges from 1 : 0.001~0.8; The SA-TCPP is modified on the O-CN by the in-situ method. Compared with the prior art, the present invention has the following advantages: (1) the photocatalyst of the present invention has more excellent photocatalytic degradation of pollutants and photolysis compared to O-CN and SA-TCPP of the prior art (2) The method of the invention is green, safe, simple in process, low in cost, suitable for industrial mass production, and has high application prospect and practical value.

The invention belongs to the technical field of pressurized solid oxide fuel cell (SOFC) hybrid-power power generation with zero release of CO2 and particularly relates to a pressurized SOFC / gas turbine (GT) / air turbine (AT) / steam turbine (ST) hybrid power system with zero release of CO2 which is combined with scavenging and integrated with an optical terminal multiplexer (OTM). The invention integrates an SOFC stack system, an OTM system, the GT, the AT, a waste heat boiler, an ST system and a CO2 recovery system to obtain a high-efficiency energy-saving environment-friendly hybrid power system with zero release of CO2. The system energy utilization rate is high; the products of combustion are only CO2 and H2O and the separation and storage of CO2 are facilitated; the power consumption is less; the system has high efficiency while recovering CO2.

a W 18 O 49 / NiWO 4 / NF self-supporting electrocatalytic material preparation method, Na 2 WO 4 ·2H 2 O and Ni (CH 3 COO) 2 ·4H 2 O is added to deionized water in turn to obtain mixed solution A; mixed solution A is loaded into a polytetrafluoroethylene-lined high pressure reactor for hydrothermal reaction, and the reactants are washed and dried to obtain NiWO by calcination 4 Crystallization; NiWO 4 Crystallization and WCl 6 Add in dehydrated alcohol successively to obtain solution C; Pour solution C into a polytetrafluoroethylene-lined autoclave, then place nickel foam in a polytetrafluoroethylene reaction kettle to carry out hydrothermal reaction, and the final reactant is Centrifugal washing with absolute ethanol and drying to obtain W 18 O 49 / NiWO 4 / NF self-supporting electrocatalytic material. The invention has the advantages of low reaction temperature, mild conditions, easy realization, simple preparation process, low cost, easy process control and environmental friendliness, and the prepared W 18 O 49 / NiWO 4 / NF electrocatalytic material, showing excellent electrocatalytic hydrogen and oxygen production performance.

The invention provides a preparation method for similarly coralloid NiSe@NC. The preparation method comprises the following steps that S1, 4,4'-dipyridyl, trimesinic acid and nickel nitrate are dissolved in N,N-dimethylformamide sequentially, after stirring is conducted for 35 minutes at room temperature, the temperature is increased to 120-130 DEG C at the rate of 5-10 DEG C, thermal reaction isconducted for 60-70 h, and Ni-MOFs are obtained; and S2, selenium powder and the Ni-MOFs are heated to 500-800 DEG C at the rate of 1-5 DEG C / min at the argon atmosphere, and after 1-3 h of heat preservation, the similarly coralloid NiSe@NC is obtained. Compared with the prior art, the preparation method has the following beneficial effects that the metal organic frameworks with nickel as the center serve as the precursor, through a one-step in-situ selenylation strategy, the coralloid NiSe@NC is obtained, then the structure can provide abundant catalytic active sites, good electrocatalysis hydrogen production and oxygen production performance is shown, 60 and 320 mV overpotential and 53 and 101 mV dec<-1> Tafel slope are achieved, and the similarly coralloid NiSe@NC can serve as a bifunctional electrocatalyst for electrolysis hydrogen evolution and oxygen evolution.

The invention provides a core-shell structure microsphere with oxygen generating effect and a preparation method thereof. A water-in-oil primary emulsion is formed by adding the aqueous phase formed by the complexation of hydrogen peroxide and polyvinylpyrrolidone into the oil phase containing polylactic acid-glycolic acid copolymer; In the phase, a water-in-oil-in-water secondary emulsion is formed, and after removing the solvent, centrifugation, washing and drying are performed to prepare core-shell microspheres with hydrogen peroxide as the core body and polylactic acid-glycolic acid copolymer as the shell layer. . Through the above method, the present invention can stably complex polyvinylpyrrolidone and hydrogen peroxide to slow down the decomposition of hydrogen peroxide; and utilize the core-shell structure of the microspheres to avoid direct contact between hydrogen peroxide and cells, while ensuring the safety of cells The hydrogen peroxide reacts under the catalysis of catalase in the body to generate oxygen and water to achieve the effect of oxygen production.

In-situ growth of W on the surface of a carbon cloth 18 o 49 The preparation method of the self-supporting electrode material, the analytical pure tungsten source is added to the mixed alcohol to obtain the solution A, and the analytical pure ethylenediamine and citric acid are added to the solution A to obtain the solution B; the solution B is poured into the polytetrafluoroethylene lined with high pressure Put the carbon cloth in the reaction kettle and put the carbon cloth into the polytetrafluoroethylene reaction kettle; put the sealed reaction kettle into the homogeneous hydrothermal reaction apparatus for hydrothermal reaction; wash the final reactant with absolute ethanol and centrifuge The washed material was dried to obtain in-situ growth of W on the surface of the carbon cloth 18 o 49 Self-supporting electrode material. Due to the high abundance and low price of carbon cloth, it has a large specific surface area, high electronic conductivity and ideal 3D open-pore structure. The present invention proposes to use carbon cloth as a supporting material, and adopts a solvothermal method to convert W 18 o 49 In situ growth on the support, the preparation of W with good electrocatalytic performance 18 o 49 / Carbon cloth nanomaterials.

The invention provides a nickel-iron diselenide compound and its preparation method and application. The nickel-iron diselenide compound is a polyhedral nanocrystal with a chemical formula of Ni x Fe 1‑x Se 2 , where the value of X is 0.5. The present invention prepares Ni on the foamed nickel substrate by electrodeposition 2 Fe(OH) 7 Compared with the time required by the traditional hydrothermal method, the reaction time is only a few hundred seconds, which greatly shortens the reaction time. The preparation process is simple and easy, and it can be prepared in a large area. 2 Fe(OH) 7 The base of the compound, and then selenize the nickel foam by solvothermal selenization to obtain a nickel-iron diselenide compound, which shows good hydrogen and oxygen production performance.