19results about How to "Lower bandgap" patented technology

The invention discloses a conjugated polymer film with electrical properties and tensile stability simultaneously improved, and a preparation method and application thereof, and belongs to the technical field of flexible electronic materials. The preparation method comprises the following steps: placing the conjugated polymer film in a solution formed by mixing an electrolyte and a dopant, and soaking for 30-60 seconds to complete ion exchange doping, thereby obtaining the conjugated polymer film with various carrier transport channels. The strategy of increasing the types of carrier transmission channels is adopted, and two main transmission channels of a crystal phase and an accumulation region are formed in the conjugated polymer film through an ion exchange doping method, so that the conjugated polymer film can maintain the electrical property at a high proportion under a stretching external field, and the electrical property of the conjugated polymer film is improved under the same stretching strain. And the tensile stability of the conductivity is far higher than that of a conjugated polymer film which only takes a crystal phase or an accumulation region as a carrier transmission channel.

This invention provides a photocatalytic composite nanoenzyme self-cleaning coating, its preparation method, and its application. Specifically, it includes: preparing solution A with Ca(NO3)2·4H2O and nano-cerium oxide; preparing solution B with (NH4)2HPO4 and hexadecyltrimethylammonium bromide; mixing solutions A and B, and reacting at high temperature to obtain cerium oxide nanoenzyme / hydroxyapatite microspheres; and using (NH4)6Mo7O... 24 Solution M is prepared by dissolving Fe(NO3)3·9H2O in deionized water; solution N is prepared by dissolving Fe(NO3)3·9H2O in deionized water; solutions M and N are mixed to obtain a precursor; the precursor is reacted with cobalt oxide at high temperature to obtain Co / Fe2(MoO4)3; tetraethyl orthosilicate, anhydrous ethanol, deionized water, and ammonia are mixed and sealed for aging; after adding a modifier, it is mixed with cerium oxide nanoenzyme / hydroxyapatite microspheres and Co / Fe2(MoO4)3, sprayed onto the obtained composite coating, and cured at high temperature to obtain a self-cleaning coating. This invention, by loading a photocatalyst and nanoenzyme / hydroxyapatite microspheres onto the surface of a modified SiO2 gel, effectively improves the photocatalytic activity and self-cleaning performance of the coating while maintaining good optical transmittance.

This invention discloses a wide-interlayer-spacing molybdenum disulfide catalyst, its preparation method, and its application, belonging to the field of water electrolysis for hydrogen production energy conversion technology. The preparation method includes the following steps: preparing a molybdenum disulfide precursor solution using a molybdenum source and a sulfur source; then subjecting the molybdenum disulfide precursor solution to a hydrothermal reaction with a carbon-containing interlayer-spacing regulator; and obtaining the wide-interlayer-spacing molybdenum disulfide catalyst after centrifugation and washing. The carbon-containing interlayer-spacing regulator is used to insert into the interlayer of molybdenum disulfide during the hydrothermal reaction, increasing the interlayer spacing of the (002) crystal planes of the obtained molybdenum disulfide catalyst. The wide-interlayer-spacing molybdenum disulfide catalyst of this invention facilitates electrolyte penetration and hydrogen bubble release, effectively avoids active site blockage, enhances the intrinsic conductivity of the catalyst, accelerates internal charge transport, increases active sites for hydrogen evolution reaction, and improves the intrinsic hydrogen evolution catalytic activity of the catalyst.

The application provides a Bi2O2CO3-MIL-68(In) heterojunction composite material and a preparation method and application thereof, and belongs to the technical field of photocatalytic materials, the field of persulfate catalysis and the field of environmental governance. The composite material is obtained by loading Bi2O2CO3 on the surface of MIL-68(In) to form a Z-type heterojunction structure; the Bi2O2CO3 is a spherical body with a diameter of 200-500 nm, and the surface is a stacked granular structure; the MIL-68(In) is a regular hexahedral rhombic rod-shaped structure with a particle size of 5-10 mu m, and the Bi2O2CO3 is dispersedly loaded on the surface of the MIL-68(In). The application has the advantages of simple operation, strong visible light absorption capacity of the heterojunction material, stable photocatalytic performance, high degradation efficiency and the like, and has a potential application prospect in the field of photocatalytic persulfate.

The application belongs to the technical field of iodine-containing wastewater treatment, and specifically provides a method for treating iodine-containing wastewater, which comprises the following steps: mixing a metal-doped bismuth tungstate material for treating iodine-containing wastewater with a binder and a conductive agent to prepare a slurry, coating the slurry on a conductive substrate, and drying to obtain a membrane electrode, and using the obtained membrane electrode to treat iodine-containing wastewater; and a preparation method of the metal-doped bismuth tungstate material for treating iodine-containing wastewater, which comprises the following steps: 1) dissolving bismuth salt and iron salt in a solvent to prepare a mixed solution; 2) adding a tungstate solution to the mixed solution to form a suspension, and then performing a hydrothermal reaction, collecting the precipitate after cooling, and washing and drying to obtain the product. The metal-doped bismuth tungstate material prepared by the application has the advantages of high specific surface area and good photo-assisted electric adsorption performance.

This invention provides a fluorine-doped ZnIn2S4 photocatalyst, its preparation method, and its application. The fluorine-doped ZnIn2S4 photocatalyst has a spherical nanoflower structure, which is composed of nanosheets arranged in an array. The preparation method includes the following steps: (1) adding ZnCl2, InCl3·4H2O, and thioacetamide to water and stirring to obtain a mixture A; (2) adding a fluorine source to mixture A and mixing thoroughly to obtain mixture B; (3) subjecting mixture B to a hydrothermal reaction, separating the product after the reaction, washing, and drying to obtain the F-ZnIn2S4 photocatalyst. The fluorine-doped ZnIn2S4 photocatalyst exhibits highly efficient photocatalytic activity.

This invention relates to the field of nanoscale full-spectrum photocatalytic materials, and particularly to a method for preparing a molybdenum selenide / oxygen-deficient bismuth oxybromine@gold three-phase Z-type heterojunction photocatalyst. This method solves the problems of low photogenerated electron-hole separation efficiency, narrow full-spectrum response range, and poor stability in existing bismuth-based photocatalysts. The preparation method involves first preparing oxygen-deficient BiOBr nanospheres via a solvothermal method, then directly reacting tetrachloroauric acid with oleylamine in toluene to prepare small-particle-size monodisperse Au nanoparticles, which are then combined with oxygen-deficient BiOBr to prepare a BiOBr@Au nanosphere core-shell structure. Finally, a MoSe2 / oxygen-deficient BiOBr@Au three-phase composite material is prepared via a hydrothermal reaction. The catalyst of this invention exhibits absorption capacity under the full spectrum of light, and simultaneously achieves a synergistic enhancement of carrier separation efficiency and strong redox capability, demonstrating excellent photocatalytic activity and the ability to efficiently degrade pollutants and produce hydrogen.

This invention belongs to the field of organic light-emitting materials and semiconductor technology, and provides a multi-aryl aromatic heterocyclic compound, its preparation method, and an electroluminescent device. The structural formula of the multi-aryl aromatic heterocyclic compound is: [structure omitted]. Using this multi-aryl aromatic heterocyclic compound as the guest light-emitting material, the luminous efficiency of the electroluminescent device is effectively improved, its lifespan is extended, and the purity of the emitted color is significantly improved. The light emitted by the electroluminescent device is in the green to red light range.

This invention relates to a high-entropy polymetallic organic framework-assisted reinforced magnesium hydride solid-state hydrogen storage material, which is composed of magnesium hydride and a high-entropy polymetallic organic framework in a mass ratio of 30-90:10-70, and its chemical formula is MgH. 2 -(FeCoNiCrMn) 3 O 4 The high-entropy multimetal-organic framework is composed of five different metal cations coordinated in an equimolar ratio; the metal cations are selected from cobalt, nickel, iron, chromium, and manganese. The material of this invention exhibits a high-entropy effect and possesses excellent thermodynamic properties and hydrogen storage cycle performance.

The invention provides a sisal hemp residue derived red light carbon dot photosensitizer as well as a preparation method and application thereof, and belongs to the technical field of nano functional materials and biomass resource utilization. The method comprises the following steps: dispersing the sisal residue in water, adding urea, stirring at room temperature, and carrying out hydrothermal reaction; and after the reaction is completed, filtering, dialyzing and drying a product in sequence to obtain the sisal hemp residue derived red light carbon dot photosensitizer. The method is wide in raw material source, low in cost, simple in process, green and environment-friendly. The particle size of the prepared red light carbon dot photosensitizer is 2-6 nm, the red light carbon dot photosensitizer has a remarkable red light emission peak at the position of 660-680 nm, especially can efficiently generate active oxygen under excitation of light with the wavelength of 660 nm, has a good application prospect in the fields of photodynamic therapy, photocatalytic disinfection, biological imaging and the like, and provides a new way for developing a novel photosensitizer which is low in cost, efficient and environmentally friendly.

This invention discloses a bifunctional three-dimensional porous composite material and its preparation method and application. The method includes the following steps: (1) adding a carbon source to deionized water and stirring to obtain a uniformly dispersed solution; (2) dissolving a rare earth metal source, a transition metal source, and a sulfur source in deionized water and stirring to obtain a precursor solution; (3) mixing the solution obtained in step (1) and the precursor solution to obtain a mixed solution and performing a hydrothermal reaction; (4) repeatedly washing the product obtained in step (3), drying it, and then performing heat treatment to prepare the bifunctional three-dimensional porous composite material. The bifunctional three-dimensional porous composite material can effectively buffer the volume expansion effect of the sulfur cathode during charging and discharging and promote the full wetting of the electrolyte. On the other hand, it also improves the conductivity and catalytic activity of the composite material through the doping of rare earth elements, effectively improving the electrochemical performance of lithium-sulfur batteries.

The invention discloses a preparation method and low-temperature application of a Te-doped tungsten niobium oxide / molybdenum niobium oxide heterojunction, and belongs to the technical field of secondary batteries. The preparation method specifically comprises the following steps: carrying out high-energy ball milling and alloying on WO3, Nb2O5 and Te2O5 to obtain amorphous Te-doped tungsten niobium oxide; the preparation method comprises the following steps: carrying out high-energy ball milling and alloying on MoO3, Nb2O5 and Te2O5 to obtain amorphous Te doped molybdenum niobium oxide; uniformly mixing and compacting the amorphous Te doped tungsten niobium oxide and the amorphous Te doped molybdenum niobium oxide, and performing discharge plasma sintering in an inert atmosphere to obtain the ceramic crystal Te doped tungsten niobium oxide / molybdenum niobium oxide heterojunction material. The Te-doped tungsten niobium oxide / molybdenum niobium oxide two-phase heterojunction material designed by the invention is relatively short in synthesis time, the synthesis period is shortened, the size of crystal grains is convenient to regulate and control, the crystallinity of the material is very good, the diffusion rate of lithium ions is greatly promoted by a heterojunction interface, the electron conductivity is improved by cooperating with Te doping, and the performance of the Te-doped tungsten niobium oxide / molybdenum niobium oxide two-phase heterojunction material is improved. The material can be used as a lithium ion negative electrode material with fast charging characteristic and good low-temperature performance.

The application discloses a kind of conjugated polymer based on alkyl-substituted phenyl and its preparation method and application, belong to polymer material technical field.The conjugated polymer provided in the application has structural formula as shown in formula (I):In formula (I), X1-X4 each independently is H or R, and at least one of X1-X4 is R.The alkyl-substituted phenyl is used as intermediate unit in the application, 3,4-ethylenedioxythiophene is used as electron-donating unit, by introducing benzene ring, so that rigid coplanar existence fusion ring structure in molecule, enhance charge flow, again combined with the alkyl of specific substitution quantity and substitution position, can adjust the electronic distribution and conjugated chain length of conjugated polymer, obtain the conjugated polymer with good electrochromic performance such as low bandwidth, wide absorption range, fast response time, good optical transmittance, good stability, the conjugated polymer has wide application in the preparation of electrochromic material or electrochromic device.

The present application relates to a kind of high-entropy calcium ferrite perovskite infrared radiation material, the chemical formula of the high-entropy calcium ferrite perovskite infrared radiation material is AB03;A site is any five elements in rare earth elements La, Pr, Ca, Ce, Gd, Sm, Nd, Dy, and 12 oxygen ions are coordinated, located in the cavity formed by octahedron;B is transition metal element Fe, and cation is formed octahedral coordination with six oxygen ions.Simultaneously, the preparation method of the high-entropy calcium ferrite perovskite infrared radiation material is disclosed.The high-entropy calcium ferrite perovskite infrared radiation material described in the present application has excellent thermal stability under the condition of 0.78~16 μm waveband infrared emissivity 0.85~0.88, 24 hours 1300 DEG C, can be applied to power station boiler, aerospace, industrial kiln and the high-temperature radiation heat transfer and heat protection field of other high-temperature radiation heat transfer and heat protection field.

The application discloses a novel small-molecule electron acceptor material, a preparation method thereof and an organic solar cell, and relates to the technical field of organic solar cells. λ onset The small-molecule electron acceptor material has a high-efficiency near-infrared spectrum (greater than 1000 nm) response and a low open-circuit voltage loss. The selenium phenol unit is introduced, the polarizability of selenium atoms and the heavy atom effect are utilized, the intermolecular interaction is enhanced, and the absorption spectrum of the molecule is widened; through side chain modification, multiple intramolecular oxygen-sulfur non-covalent interactions are introduced, on the one hand, the intramolecular ICT effect is enhanced, the band gap is reduced, on the other hand, the multiple oxygen-sulfur non-covalent bonds lock the molecular configuration, the molecular rigidity is enhanced, vibration is inhibited, non-radiative recombination and open-circuit voltage loss are reduced. λ onset The application is applied to organic solar cell single-junction and tandem devices, and the photovoltaic response characteristics of more than 1000 nm are realized, and energy conversion efficiencies of more than 17% and 21% are obtained, which are the highest device efficiencies of the spectrum response of more than 1000 nm in the current research field of organic solar cells.

The invention relates to a dipyrrolothiophene compound, a photoelectric device and photoelectric equipment. The structural formula of the dipyrrolothiophene compound is shown in the specification, in the formula, R1, R2, R3, R4, R5 and R6 are respectively and independently selected from one or a combination of more of hydrogen, an energy level regulating group, a conjugate group, a solubility regulating group, an anchoring group and a polar group, the molecule takes a dipyrrolothiophene ring as a core to form a symmetrical planar tricyclic system, and a rigid planar structure without obvious distortion is formed. The rigidity derives from condensed ring conjugated strong bond energy, thermal vibration distortion of molecular configuration is effectively avoided, and a stable conjugate channel is provided for charge transfer. And the prepared photoelectric device and photoelectric equipment are high in photoelectric conversion efficiency.

The invention provides a Fe-ZnO (at) Au-DTNB nano-label with an electronic structure regulated and controlled as well as a preparation method and application of the Fe-ZnO (at) Au-DTNB nano-label, and relates to the technical field of lateral flow immunoassay. The nano-label comprises iron-doped zinc oxide, and the iron-doped zinc oxide is loaded with gold nano-particles. The nano-label further comprises a Raman reporter molecule DNTB, one end of the Raman reporter molecule DNTB is connected with the gold nano-particles through an Au-S bond, and the other end of the Raman reporter molecule DNTB is coupled with the A-influenza-resistant labeled antibody through modified carboxyl. According to the preparation method, the electronic structure of ZnO is adjusted through iron doping, so that surface charges of Fe-ZnO (at) Au-DTNB are enriched; the surface hot spots and the SERS activity are enhanced, so that the excellent performance is given to the LFIA detection system based on the Fe-ZnO (at) Au-DTNB.

This invention proposes a one-dimensional organometallic conductive coordination polymer, its preparation method, and its applications, relating to the field of coordination polymers. The method includes the following steps: methanol is added to p-benzoquinone, stirred until completely dissolved under ice-water bath conditions, followed by the dropwise addition of an organic amine compound, and the reaction is stirred at room temperature; after the reaction is complete, the reaction solution is rotary evaporated under reduced pressure at 45°C, filtered, washed, and dried to obtain a 2,5-diamino-substituted benzoquinone ligand; a water-DMF mixed solvent is then added, stirred until homogeneous, followed by the addition of a divalent transition metal inorganic salt, and the reaction system is then heated to 80°C and reacted at this temperature for 10-15 hours; after the reaction is complete, the reaction product is cooled, filtered, washed, and dried, yielding a brownish-black solid powder, which is the one-dimensional organometallic conductive coordination polymer. The preparation method of this invention is simple, the viscosity of the target polymer can be adjusted by the R groups on the side chain, and the physicochemical properties of the polymer can be utilized through the divalent transition metal ion, resulting in superior conductivity and lower manufacturing costs compared to existing conductive polymers.