33results about How to "Improves light-harvesting capabilities" patented technology

The invention discloses organic dye containing calixarene derivative and a preparation method and application thereof. The organic dye has the characteristics of a classical D-pi-A structure in the organic dye, a calixarene framework and a derivative unit of the calixarene framework are introduced to serve as electron donors, and cyanoacetic acid connected with a conjugate bridge group serves as an electron acceptor and is used to prepare dye sensitized solar cells. Dye molecules are introduced to the calixarene derivative unit, thereby prolonging a conjugated chain to absorb absorption spectrum and effectively restraining molecular aggregation caused by the dye absorbed onto TiO2. In addition, the dye molecules contain a plurality of light absorption units so that the light trapping capability can be improved greatly. The organic dye serving as photosensitive dye is used for preparing the dye sensitized solar cells. The organic dye enables the service life of the cells to be prolonged through photo-thermal stability of the calixarene framework.

The invention, which belongs to the technical field of functional nano materials, provides a preparation method of a bismuth-doped polymerized carbon nitride nano composite material containing carbondefects. The method comprises the following steps: step 1, preparing ultrathin PCN nanosheets; and step 2, preparing a bismuth-doped polymerized carbon nitride (Bi/CV-PCN) nano composite material containing carbon defects. According to the preparation method, 2, 4, 6-triaminopyrimidine is introduced into a CN structure through supramolecular aggregation and ion melt polycondensation to obtain theultrathin PCN nanosheet, the crystallinity of PCN is controlled, and visible light absorption is enhanced. Then, a Bi/CV-PCN nano composite material is synthesized by utilizing a mild and simple one-pot hydrothermal method. Under the synergistic effect of an SPR effect caused by Bi doping and CVs, the photoactivity and the photoelectrochemical stability of the composite material are further improved, and charge separation is accelerated.

The invention discloses TiO2 slurry used in large-area dye-sensitized solar cell preparation by a screen printing technology. The TiO2 slurry comprises TiO2, terpilenol, ethyl cellulose, a leveling agent and ethanol. The mass ratio of the TiO2, the terpilenol, the ethyl cellulose and the leveling agent is 0.5-3: 3-13: 0.3-2:0.1-3; the particle size of the TiO2 is 10-30 nm, wherein if counted by number, the TiO2 with a particle size equal to or more than 10 nm and less than 20 nm accounts for 10% to 25%, the TiO2 with a particle size of 20 nm accounts for 60% to 75%, and the TiO2 with a particle size more than 20 nm and equal to or less than 30 nm accounts for 10% to 20%; the viscosity of the slurry is 2.1*10<5> to 2.5*10<5> mPa.s. The slurry can be printed repeatedly and no cracks are generated; high-temperature sintering enables the slurry to exhibit excellent inter-particle bonding performance and not easy to exfoliate; and therefore, the provided TiO2 slurry and a method for preparing the TiO2 slurry are suitable for large-area dye-sensitized solar cell preparation by using the screen printing technology and have industrial mass production prospects.

The invention provides a preparation method of bismuthyl carbonate. The method includes the steps of: (1) dissolving bismuth nitrate in dilute nitric acid to obtain a solution A; (2) adding citric acid into the solution A, and performing stirring to obtain a clarified solution B; (3) adding strong alkali dropwise into the solution B to adjust the pH to 7-9, thus obtaining a mixed system C; (4) putting the mixed system C into a closed container, and carrying out hydrothermal synthesis reaction at 170DEG C-200DEG C for 8-24h; and (5) carrying out solid-liquid separation on the product obtained in step (4), then collecting the solid, conduct water washing and alcohol washing on the solid, then performing drying, and conducting grinding. The method provided by the invention has a simple technological process, mild reaction conditions and is low in cost, and the prepared bismuthyl carbonate microspheres are uniform in morphology and particle size, have a flower-like layered microstructure composed of a plurality of nanosheets, and have high specific surface area and high catalytic performance.

The invention discloses a graphite type carbon nitride composite photocatalytic material containing an oxygen vacancy bismuth tungstate/oxygen-enriched structure as well as a preparation method and application of the graphite type carbon nitride composite photocatalytic material. The composite photocatalytic material is formed by compounding oxygen vacancy-containing bismuth tungstate and graphitetype carbon nitride with an oxygen-enriched structure. The preparation method comprises the following steps: calcining dicyandiamide and ammonium tungstate used as raw materials to synthesize graphite type carbon nitride with an oxygen-enriched structure, and carrying out one-step hydrothermal method under the action of octadecyl trimethyl ammonium chloride by using bismuth nitrate pentahydrate,sodium tungstate dihydrate and graphite type carbon nitride with an oxygen-enriched structure as raw materials. The composite photocatalytic material disclosed by the invention has the advantages of strong stability, strong light capturing capability, high electron-hole pair separation efficiency, excellent photocatalytic performance and the like; the preparation method has the advantages of mildreaction conditions, simple process flow, low energy consumption, less material consumption and the like, is suitable for large-scale popularization and application, has a good antibiotic removal effect, and has a good application prospect in photocatalytic degradation of antibiotic wastewater.

The invention discloses preparation and application of a silver/strontium/titanium dioxide-graphene carbon nitride composite photocatalytic material, and relates to the technical field of photocatalytic materials. According to the preparation and application provided by the invention, doping of Ag/Sr nanoparticles and a heterojunction structure formed by TiO2 and g-C3N4 play an important role in broadening a light absorption range of the catalyst Sr/Ag-TiO2@g-C3N4 and improving the photocatalytic activity; main influence factors affecting the photocatalytic efficiency such as a usage amount ofthe catalyst, illumination time, a pH and an RB-42 concentration are optimized by using an RSM model, and under the optimized conditions, 95% of RB-42 dye molecules are subjected to photocatalytic oxidation degradation; and the Sr/Ag-TiO2@g-C3N4 co-doped photocatalyst has certain application prospects to removal of dyeing macro-molecular refractory organic contaminants.

The invention relates to a preparation method of a trimesic acid complex/titanium dioxide composite photoanode, which relates to the field of the construction of a rare earth trimesic acid complex/TiO2 composite photoanode and solves a problem of how to improve the photoelectric conversion efficiency of a dye-sensitized solar cell formed by a semiconductor photoanode. The method comprises the steps of first, obtaining dried trimesic acid complex nano-crystals; mixing the dried trimesic acid complex nano-crystals and TiO2(P25), and obtaining mixed sol after uniform mixing; fifth, uniformly coating the surface of FTO glass with the mixed sol, drying and roasting, and naturally cooling to the room temperature; then uniformly smearing the mixed sol on the first layer of the mixed sol on the FTO glass, drying and roasting so as to complete the preparation of the trimesic acid complex/titanium dioxide composite photoanode. The preparation method is mainly used for preparing the dye-sensitized solar cells.

The invention discloses an II-type core-shell structure quantum dot and a preparation method thereof and an application in preparation of a quantum dot-sensitized photoelectrode. The II-type core-shell structure quantum dot comprises a shell layer and a core layer and the component is CdZnTe@CdS; and the molar ratio of an element Cd to an element Zn is (0.15-1.8):1. The invention discloses a novelcore-shell structure quantum dot, and an II-type core-shell structure is obtained under the low-thickness CdS shell layer. The light trapping capacity of the quantum dot-sensitized photoelectrode prepared by using the II-type core-shell structure quantum dot is significantly improved, the injection efficiency of photo-induced electrons is not affected and a quantum dot-sensitized solar cell prepared by using the quantum dot is expected to have more excellent photoelectric conversion efficiency.

The invention relates to the technical field of photocatalytic olefin isomerization, in particular to application of oxygen-deficient tungsten trioxide in photocatalytic olefin isomerization and a photocatalytic olefin isomerization method, and aims at solving the technical problems that: existing photocatalytic olefin isomerization reaction substrates are small in application range, poor in reaction selectivity and low in solar energy utilization efficiency. According to the technical scheme, oxygen-deficient tungsten trioxide is used as a photocatalyst to be applied to photocatalytic olefin isomerization; The photocatalytic olefin isomerization method is characterized by sequentially comprising the following steps: 1) adding 0.05-0.25 g of oxygen-deficient tungsten trioxide and 0.25-1.25 mmol of olefin into 2.5-12.5 ml of cyclohexane, and performing uniform stirring; and 2) under the reaction conditions of normal pressure, 40-70 DEG C and inert gas protection, performing irradiating with light of 390-700 nm for 6-36 hours.

The invention provides a photoelectric immunosensor for detecting an Alzheimer's disease marker as well as a preparation method and application of the photoelectric immunosensor, and constructs an ultra-sensitive photoelectric immunosensor based on a zinc oxide-polydopamine-gold nano composite material, which is used for quantitative detection of the Alzheimer's disease marker. A polydopamine film not only can be used as a sensitizer for charge separation to improve the photoelectric conversion efficiency, but also can be used as a reducing agent for in-situ deposition of Au, and also can be used for binding antibodies to improve the carrier quantity of the antibodies. Au nanoparticles are loaded on a surface of the polydopamine film, so charge transfer efficiency and the photoelectrochemical activity under visible light are further improved. The disease marker is advantaged in that the zinc oxide-polydopamine-gold nano composite material obviously enhances the light current on the photoelectrode. Under optimized conditions, the photoelectric immunosensor has a good linear relationship in a range of 1 pg/mL to 100 ng/mL, and the lower limit of detection is 0.26 pg/mL. In addition, the photoelectric immunosensor also has good selectivity, stability and reproducibility.

The invention discloses a thin-film solar cell of a relief structure and belongs to an innovation transformation technology of a solar cell surface structure. The relief structure is directly manufactured on the upper face of cell base body materials. A cell thin film is attached to the surfaces of a relief body and a cell surface flow channel. A cell protecting film covers the top end of the relief body. Sunlight is emitted into the surface of the cell, diffuse reflection and repeated reflection can happen for sure, accordingly, light reflection loss is greatly lowered, and light pollution which may be generated is avoided. Hot gas emission is smooth through the cell surface flow channel, power attenuation which becomes severe along with temperature rising of the cell is relieved and weakened, and solar cell performance is obviously optimized.

The invention discloses a preparation method of a carbon-nitrogen-boron nanosheet optical antibacterial material. The preparation method comprises the following specific steps: (1) preparing a precursor: adding a boron source into a nitrogen source solution, performing ultrasonic dissolution, adding silicon dioxide microsphere sol or aluminum oxide nanoparticle as a template, drying by distillation, then taking out and uniformly grinding; (2) calcining the precursor: putting the precursor prepared in the step (1) into a muffle furnace, calcining, then cooling, taking out and uniformly grinding; (3) removing the template: adding the material uniformly ground in the step (2) into a hydrogen fluoride solution or a hydrochloric acid solution, shaking and purifying to obtain the carbon-nitrogen-boron nanosheet optical antibacterial material. The carbon-nitrogen-boron nanosheet optical antibacterial material prepared by the preparation method provided by the invention adopts a lamellar structure, has less layer accumulation, relatively high surface potential and relatively high stability, and can still maintain an antibacterial effect after high-temperature and high-pressure treatment; the carbon-nitrogen-boron nanosheet optical antibacterial material has significantly enhanced visible light capturing capability, and can generate a significant antibacterial effect on escherichia coli in visible light without the need of being compounded with other compounds.

The invention relates to a composite double-layer photo-anode film, a preparation method thereof and a dye-sensitized solar cell and relates to the field of dye-sensitized solar cells. The composite double-layer photo-anode film comprises a composite light-emitting layer and a light scattering layer, wherein the composite light-emitting layer comprises mixed doped NaYbF4:Ho3+ up-conversion luminescent powders and titanium dioxide powders; and the light scattering layer comprises porous hollow titanium dioxide microspheres. The composite double-layer photo-anode film provided by the invention has a large light absorption range, light capturing capability, and a good dye adsorption capability. Further, the present invention relates to a method for preparing the composite double-layer photo-anode film and a dye-sensitized solar cell comprising the composite double-layer photo-anode film.

The invention discloses a preparation method of a Cr-doped CaTiO3 yellow ceramic pigment, which comprises the following steps: dissolving butyl titanate into ethanol so as to obtain liquid A; dissolving calcium chloride dihydrate and chromic nitrate into distilled water, and mixing the obtained mixture with ethanol so as to obtain liquid B; stirring and mixing the liquid A and the liquid B, and adding the obtained mixture into an alkaline regulator, so that the pH value of the mixed solution system is 12; further stirring, putting the obtained object into a hydrothermal kettle, and carrying out heat preservation for 1-36h at a temperature of 180-260 DEG C, so that the Cr-doped CaTiO3 yellow ceramic pigment is obtained. In addition, the invention also discloses products prepared by using the preparation method and applications. According to the invention, the properties and use of a CaTiO3 material as a ceramic pigment are developed and expanded, and the CaTiO3 material is prepared in a low cost, which facilitates the promotion of the application and development of CaTiO3 material and ceramic pigment production technologies.

The invention discloses a carbazole compound and application thereof. The carbazole compound has a structure as shown in a formula (I) (the formula is as shown in the description; and in the formula (I), R1 is C1-C12 hydrocarbyl or C1-C12 alkoyx or C4-C20 heterocyclic radical, the heteroatom of the heterocyclic radical is N or S or O, R2 is C1-C12 hydrocarbyl, and R3 is aryl radical or heterocyclic aromatic hydrocarbon. The compound provided by the invention can serve as a sensitizing agent of a dye-sensitized solar battery.