8results about How to "Lower energy gap" patented technology

The invention discloses a copper oxide-based photo-thermal conversion material, a preparation method and application thereof, and belongs to the technical field of photo-thermal materials.According to the method, a copper oxide microflower / carbon nano tube photo-thermal conversion material is synthesized through a microwave hydrothermal method, microflowers are formed by mutually supporting ordered nanosheets, and carbon nano tubes are wound on the nanosheets; the refraction and reflection times of incident light in the material can be increased by utilizing a light trap formed by the staggered micro-nano hierarchical structure, so that multiple absorption of sunlight is effectively promoted, and light capture is increased. Meanwhile, through the synergistic photo-thermal effect of the metal oxide semiconductor / carbon-based composite material, the evaporation rate and the light absorptivity can be improved. In addition, the composite photo-thermal material is applied to a 3D nested structure solar driving interface steam system, and continuous and efficient seawater desalination is achieved.

The invention provides copper-doped iron sulfide as well as a preparation method and application thereof, and the preparation method of the copper-doped iron sulfide comprises the following steps: S1, preparing a metal salt solution from iron nitrate and copper nitrate; wherein in the metal salt solution, the sum of the molar concentration of iron ions and the molar concentration of copper ions is 0.003 mol / 25 ml to 0.06 mol / 25 ml; s2, dissolving a sulfur source in a metal salt solution to obtain a mixed solution, heating the mixed solution to 120-180 DEG C under a high-pressure condition, carrying out heat preservation for 12 hours, and separating solids in the mixed solution to obtain copper-doped iron sulfide; the molar concentration of the sulfur source in the mixed solution is 0.01-0.1 mol / 50ml; or, the metal salt solution is heated to 120-180 DEG C under the high-pressure condition, heat preservation is conducted for 12 h, a precursor is obtained, the precursor and elemental sulfur are mixed and then heated to 400 DEG C, heat preservation is conducted for 2 h, and the copper-doped iron sulfide is obtained. The adsorption capacity of the ferric sulfide mercury is improved, and meanwhile, the method has a remarkable economic advantage in the aspect of HgO removal.

The invention relates to an organic micromolecule photo-thermal material, an evaporator system containing the photo-thermal material, a preparation method and application of the photo-thermal material, and particularly, the photo-thermal material provided by the invention has excellent photo-thermal performance including a narrow energy gap of 0.77 eV, a wide absorption spectrum of 250-1840 nm and photo-thermal conversion efficiency of 26.75% under simulated sunlight. The temperature can be quickly increased to 68 DEG C under simulated sunlight (the light intensity is 1kW m <-2 >), and the temperature can reach 140 DEG C under the condition of strong light (4kW m <-2 >). In addition, the material shows excellent light stability, and still keeps stable after multiple heating / cooling cycles and long-time illumination. The application range is wide, efficient conversion from light to heat to electricity can be achieved, a flexible evaporator and a water-electricity co-production system driven by solar energy can be constructed, and the system is particularly suitable for providing energy and fresh water for remote areas.

The invention discloses photocatalyst fluorescent ink, and relates to the technical field of ink. According to the invention, the self-made fluorescent agent is frozen into microspheres, and titanium dioxide is adsorbed on the surface of the self-made fluorescent agent by using plasma, electrostatic spraying and microwaves, so that the stability of the ink is improved; then, through low-temperature plasma assisted radio frequency magnetron sputtering, cerium oxide is coordinated and chelated on the surfaces of the titanium dioxide microspheres, so that the visible light activity of titanium dioxide is improved, and ink can be catalytically degraded under visible light; wherein the self-made fluorescent agent is prepared from veratrone, pyrenecarboxaldehyde and boron trifluoride, so that the ink can display patterns only under infrared wavelength irradiation, is not easy to decompose by illumination under long-time infrared irradiation, and has better light stability. The photocatalyst fluorescent ink prepared by the invention has the effects of good confidentiality, light stability and degradability.

The invention discloses an N-heterocyclic organic electrode material, a preparation method thereof and a water-based aluminum ion battery, and relates to the technical field of batteries, and the N-heterocyclic organic electrode material is a small molecule containing C = N and-CN active units synthesized through a dehydration condensation reaction. The invention also provides a preparation method of the N-heterocyclic organic electrode material and a water-based aluminum ion battery prepared from the N-heterocyclic organic electrode material. The raw materials used in the invention are green and environment-friendly, the price is low, the preparation process is simple, and the application prospect is good. And when the organic electrode material is used for manufacturing the positive electrode of the aluminum ion battery, the positive electrode has excellent specific capacity, good rate capability and outstanding long cycle stability, so that the aqueous aluminum ion battery has excellent electrochemical performance.

This invention relates to the field of organic electroluminescent materials, specifically to an iridium metal complex, and more particularly to an iridium metal complex for deep red-near-infrared emission and its applications, as well as organic electroluminescent devices using the iridium metal complex of this invention. The iridium metal complex of this invention has the structure shown in formula (1). OLED devices prepared using the iridium metal complex of this invention exhibit higher luminous efficiency and better lifespan, demonstrating promising application prospects.

The invention discloses a preparation method of a dual-mechanism oxygen evolution reaction spinel oxide electrocatalyst based on a strategy of partially filling oxygen vacancies with anions, and relates to a preparation method of an oxygen evolution reaction spinel oxide electrocatalyst. The technical problems that an existing pure spinel oxide is low in catalytic efficiency and unstable in structure are solved. The preparation method comprises the following steps: 1, preparing a self-supporting spinel oxide electrode material; 2, preparing a self-supporting oxygen vacancy enriched spinel oxide electrode material; 3, preparing a self-supporting oxygen vacancy part anion filling type catalyst; according to the invention, an oxygen vacancy-anion partial filling strategy is utilized to regulate and control the local structure and the electronic state of the spinel oxide. The overpotential of the prepared Co3O4-VO-S / NF catalyst in 1.0 M KOH at the current density of 50 mA cm <-2 > is as low as 301 mV, and the Co3O4-VO-S / NF catalyst can stably run for more than 120 hours and can be used in the field of hydrogen production by water electrolysis.

The invention discloses a circular polarization luminescent material and a preparation method thereof, and a circular polarization organic light-emitting diode, the circular polarization luminescent material comprises a compound represented by a general formula (I): # imgabs0 #, in which R1 is # imgabs1 # or # imgabs2 #; x is OTf, Cl, Br, I, TFSI or PF6; r2 is any one of methyl, phenyl, benzyl, methylnaphthalene, methylanthracene, methylbenzopyrene, methylpyrene, methylphenanthrene and methylperylene. According to the circularly polarized light-emitting material, the circularly polarized light-emitting performance of the material is jointly improved through the synergistic effect among the chiral binaphthalene structure, the pyridine ring, the substituent group of the pyridine ring and the formed supramolecular structure or fractal structure.