525results about How to "Expand the scope of absorption" patented technology

The invention relates to a compound catalytic material for purifying harmful gas. Deionized water is used as dispersant to compound nano-catalytic material, rare earth compound, p-type semiconductor, antimicrobial, plant extract and anion powder. The compound catalytic material can fast and thoroughly eliminate free formaldehyde, benzene homologue, ammonia and TVOC harmful gas. The compound catalytic material does not require ultraviolet light, has simple use and low cost and does not have toxic side effect and secondary pollution, and the purification effect can last for more than five years without rebound. At the same time, the compound catalytic material prevents bacteria, germina and mildew from invading human body, removes peculiar smell, odor, smoke, leather flavour, paint flavour and the like, increases anion and far infrared ray which are beneficial to human body and improves indoor air environmental quality comprehensively. The experiment detection shows that formaldehyde clearance rate within 24 hours is 91.6 percent; benzene clearance rate is 88.9 percent; ammonia clearance rate is 90.5 percent; TVOC clearance rate is 87.6 percent; sterilization and bacteriostasis rate is 99.99 percent; mould prevention is 0 grade; and acute oral toxicity is tested as actually nontoxic class.

Compositions, synthesis and applications for benzene, furan, thiophene, selenophene, pyrole, pyran, pyridine, oxazole, thiazole and imidazole derivatized anthra[2,3-b:6,7-b′]dithiophene (ADT) based polymers, namely, poly{5,11-bis(5-(2-ethylhexyl)thiophen-2-yl)anthra[2,3-b:6,7-b′]dithiophene-2,8-diyl-alt-2-ethyl-1-(thieno[3,4-b]thiophen-2-yl)hexan-1-one-4,6-diyl}, poly{5,11-bis(5-(2-ethylhexyl)furan-2-yl)anthra[2,3-b:6,7-b′]dithiophene-2,8-diyl-alt-2-ethyl-1-(thieno[3,4-b]thiophen-2-yl)hexan-1-one-4,6-diyl and poly{5,11-bis(5-(2-ethylhexyl)selenophen-2-yl)anthra[2,3-b:6,7-b′]dithiophene-2,8-diyl-alt-2-ethyl-1-(thieno[3,4-b]thiophen-2-yl)hexan-1-one-4,6-diyl} are disclosed. Further, an organic solar cell constructed of a derivatized anthra[2,3-b:6,7-b′]dithiophene (ADT) based polymer is discussed.

The invention discloses a MoSe ₂ Nanosheet Composite Firework-like TiO ₂ Nanorod arrays, which include TiO ₂ Nanorod arrays and MoSe ₂ nanosheets; the MoSe ₂ nanosheets are uniformly and massively distributed in the TiO ₂ The surface of the nanorod array has good recombination on the array surface; the TiO ₂ Nanorod arrays are made of TiO ₂ self-assembled nanorods. The present invention also discloses that the MoSe ₂ Nanosheet Composite Firework-like TiO ₂ Fabrication of nanorod arrays using a two-step solvothermal method to make MoSe ₂ Nanosheets uniformly grown on fireworks-like TiO ₂ On the nanorod array, a material with good composite morphology is obtained. The prepared semiconductor material has increased spectral absorption range and specific surface area, reduced carrier recombination probability, good photocatalytic degradation performance, and has great application potential in the field of photocatalytic degradation. The preparation method of the invention has the advantages of simple operation, high yield, low preparation cost and the like.

The invention provides a polypyrrole/silver@silver chloride core-shell structure nano wire, and a preparation method and application thereof. A silver@silver chloride core-shell structure nano wire is synthesized by a two-step etching method at first; the silver@silver chloride nano wire is coupled with polypyrrole to prepare the polypyrrole/silver@silver chloride core-shell structure nano wire; the polypyrrole/silver@silver chloride core-shell structure nano wire has application potential in development of a photoelectric chemical sensor. Compared with the prior art, the silver nano wire disclosed by the invention can quickly transfer electrons and effectively stop recombination of electrons and holes; due to polypyrrole, an absorption range of an electrode to visible light is expanded, and the light current conversion efficiency is improved. By detection on pyrogallol, a polypyrrole/silver@silver chloride photoelectric chemical sensor has the advantages of quick response, high sensitivity, high selectivity and the like.

A conjugated polymer containing isoindigo units is disclosed, which has the following structure: P: formula I; wherein, Ar is formula II, formula III or formula IV; R¹ is a C₈-C₂₀ alkyl; R² is a C₁-C₁₂ alkyl; n is an integer of 2-50. The conjugated polymer containing isoindigo units of this type has good solubility and film-forming property, as well as high thermal stability. HOMO and LUMO energy level are regulated effectively; the absorption range is broaden; and the energy conversion efficiency is greatly improved. A preparation method for the above conjugated polymer containing isoindigo units and use thereof in related fields are also provided.

The invention discloses a ternary nanocomposite Au/RGO-TiO2 nanotube array as well as a preparation method and application thereof. A graphene film and nano gold particles are modified on the surface of a titanium dioxide nanotube array; and the nano gold particles are also modified and distributed on the inner pipe wall and the outer pipe wall of the titanium dioxide nanotube array. By the ternary nanocomposite Au/RGO-TiO2 nanotube array as well as the preparation method and the application thereof, the adsorption capability and the electron conduction capability of the titanium dioxide nanotube array are further enhanced, the absorption range of a visible light zone is widened, and the photoelectric conversion efficiency is improved.

The invention relates to a preparation method of a flower-like molybdenum disulfide and UiO-66 combined photocatalyst, wherein the method comprises the steps: by using zircon salt and an organic ligand as precursors and a polar solvent as a dispersing agent, preparing a white solid product, namely spherical UiO-66 nanoparticles, by a solvothermal method; then dispersing the spherical UiO-66 nanoparticles into distilled water to form a milk white solution; sequentially adding a molybdenum source and a sulfur source into the milk white solution, ultrasonically dissolving and stirring for 30 min,transferring into an autoclave with a polytetrafluoroethylene liner, heating at constant temperature, cooling to room temperature, and centrifugally separating to obtain a grey black product; and finally, washing the grey black product with absolute ethyl alcohol, and performing vacuum drying to constant weight to obtain the flower-like molybdenum disulfide and UiO-66 combined photocatalyst. Themethod is simple to operate, the raw materials are easy to obtain, the cost is low, and the obtained photocatalyst has excellent photocatalytic degradation performance.

The invention discloses an organic thin-film solar cell based on dual mixed active layers and a preparation method thereof. The organic thin-film solar cell is of a positive type structure and sequentially comprises a transparent substrate, a transparent anode electrode, an anode modification layer, the first mixed active layer, the second mixed active layer, an electronic buffer layer and a cathode electrode from bottom to top. The first mixed active layer is formed by doping P-type materials with double materials. The second mixed active layer is formed by doping double materials with N-type materials. The P-type, N-type and double materials are doped to form the dual heterojunction type active layers so as to absorb light of different wavebands, and meanwhile the advantages of the bulk heterojunction and the advantage of connecting the double materials with the P-type and N-type materials to form the dual heterojunction are utilized, so that the solar cell greatly improves the device light absorption efficiency, increases the absorption wavelength, improves exciton transmission and separation efficiency, and finally improves the conversion efficiency.

The invention relates to a C3N4/SiO2 heterojunction photocatalyst and a preparation method thereof. The method comprises the following steps that 2 g of melamine and a certain mass of nanosilicon dioxide are weighed; 10 ml of deionized water is added into the mixture; ultrasonic dispersion is performed for 4 h; the obtained suspension is stirred at the temperature of 90 DEG C for 12 h; then, the obtained solid is heated to 540 DEG C at the heating speed of 4 DEG C per min; the temperature is kept constant for 4 h; after natural cooling, the C3N4/SiO2 heterojunction photocatalyst is obtained. The C3N4/SiO2 heterojunction photocatalyst has the excellent organic pollutant degradation performance under visible light. According to the preparation method, the raw materials are cheap, and the method is simple, so that the product cost is effectively lowered, the visible light absorption range is enlarged due to composition of C3N4 and SiO2, the sunlight utilization rate is increased, and the high practical value and application prospect are achieved.

The invention discloses an energy-absorbing method based on a hybrid dynamic polymer. The hybrid dynamic polymer contains both organic borate bonds and inorganic borate bonds and selectively containsone or more selected from a group consisting of boric anhydride dynamic covalent bonds and supramolecular hydrogen bonds. Due to dynamic reversibility of the boron-containing dynamic covalent bonds and the supramolecular hydrogen bonds, the hybrid dynamic polymer can provide the good functions of damping, shock absorption, sound insulation, impact resistance and the like as an energy-absorbing material; and the hybrid dynamic polymer is especially applicable to the body protection of people during exercises, daily life and working, the body protection of the military police, explosion prevention, protection in airborne landing and aerial delivery, collision prevention of automobiles, anti-impact protection of electronic products and electric appliances, etc.

The invention provides an adjustable vacuum sucker device for assembling and adjusting a lens of a photoetching machine and relates to the technical field of the manufacturing, assembly and adjustment of projection objective lens of deep ultraviolet photoetching machines. By the adjustable vacuum sucker device, the problem that lenses, lens barrels and lens frames of different dimensions cannot be reliably absorbed and transported in the process of processing and assembling photoetching projection objective lenses is solved. The adjustable vacuum sucker device comprises an adaptive joint, an upper cover, a shell, a worm wheel, a worm screw, an adjusting handle, shift pins, a connecting rod and rubber suction nozzles. The three shift pins which are circumferentially and uniformly distributed are driven to rotate through the meshing driving of the worm wheel and the worm screw; and the shift pins shift the connecting rod to make the centrosymmetrical three rubber suction nozzles synchronously moved from the center to the periphery. The sucker device has a simple structure, steplessly adjustable suction ranges, large adjustment ranges and capability of self locking, and the rubber suction nozzles do not damage the surfaces of sucked workpieces. The sucker device can be used for sucking optics lenses and the suction of parts such as the lens frames and the like with annular end faces, has a simple structure, can be used for nondestructive clamping, is continuously adjustable, and can simultaneously suck the lenses and the lens frames.

The invention provides a nanometer composite material ZnIn2S4@PCN-224 based on ternary sulfide ZnIn2S4 and porphyrin MOFs (Metal-organic Frameworks). The nanometer composite material is prepared by the following steps: firstly dispersing activated PCN-224 into a N,N-dimethyl formamide-glycerol mixed solution, then adding ZnCl2, InCl3.4H2O and TAA and stirring for 0.5-1.5 hours; and performing heatinsulation treatment on a mixed suspension for 8-12 hours at a temperature of 160-200 DEG C, cooling to a room temperature, washing a solid product with distilled water and ethanol, performing centrifugal separation and precipitation, and drying to obtain solid powder, namely the ZnIn2S4@PCN-224. The nanometer composite material ZnIn2S4@PCN-224 provided by the invention has the benefits that theZnIn2S4 is loaded onto the porphyrin metal-organic framework PCN-224 through a solvo-thermal method, so that on one hand, organic pollutants can be better absorbed, and on the other hand, the separation efficiency of photo-generated electrons and holes is remarkably improved, and the photo-catalytic hydrogen production activity is significantly improved.

The invention relates to the technical field of organic materials and provides a thienothiophene quinoid organic photoelectric material. The material is a compound which is shown as a structural formula (I); in the formula, R1, R2, R3, R4, R5 and R6 are selected from H, C1-C20 alkyl group or C1-C20 alkoxyl group; and m and n are integers of 0-10. The invention also provides a preparation method and application of the thienothiophene quinoid organic photoelectric material. Since the thienothiophene quinoid organic photoelectric material has a quinoid thiophene ring and a cyano group, wider spectral response is guaranteed, the photoelectric conversion efficiency of the material is increased, and better thermal stability and environmental stability are shown.

The invention relates to a method for preparing a nano-silver loaded tungsten trioxide with high photocatalytic activity, which belongs to the technical field of inorganic photocatalyst preparation process. The method of the invention is characterized in that the method comprises the following steps: preparing a tungsten trioxide nano sheet as a substrate by using a new method; then through an ultraviolet reduction method, uniformly loading nano silver on the tungsten trioxide nano sheet; and roasting the obtained product at a certain temperature in the state of wetting so as to obtain a novel nano-silver loaded tungsten trioxide, thereby achieving the purpose of improving the photocatalytic activity of the tungsten trioxide. The photocatalyst prepared by using the method in the invention can be used for processing discharged industrial wastewater such as dye wastewater and the like, and compared with other methods, the catalytic efficiency of the photocatalyst prepared by using the method in the invention is greatly improved; and meanwhile, the method in the invention has the advantages of simple process and environmental protection, etc.

The invention discloses a preparation method of a carbon quantum dot supported TiO2 nano-composite material (CQDs/TiO2). The method includes: dissolving glucose in deionized water and placing the solution in a microwave oven to heat the solution, on high fire, for 3-6 min; after the reaction is finished, adding deionized water to the mixture and uniformly stirring the mixture for dilution to obtain a carbon quantum dot solution; then adding deionized water and tetrabutyl titanate to the carbon quantum dot solution to perform hydrothermal reaction, after the reaction is finished, washing the product with deionized water, and drying the product to prepare the CQDs/TiO2 nano-composite material. In the method, CQDs are supported on the TiO2 through the hydrothermal reaction; by introducing theCQDs, absorption range on visible light of the TiO2 is enlarged. The product, when being used in photocatalytic reduction of CO2, is high in yield of CO, maximum yield reaching 43 [mu]mol/g*h.

The invention relates to I-III-VI group semiconductor quantum dots, in particular to a synthesis method for an Ag-In-Zn-S/CQDs heterojunction material. The synthesis method comprises the following steps: weighing and dissolving silver nitrate, indium nitrate and zinc acetate dihydrate in deionized water, stirring and dissolving to obtain a clear solution; dissolving a mixed ligand thiohydracrylicacid (MPA) and L-cysteine (Cys) in an aqueous solution; then adding into the clear solution to obtain a mixed solution; adjusting the pH value of the mixed solution with a NaOH solution; then adding thioacetamide and stirring ultrasonically; then adding carbon quantum dots in different amounts; then carrying out a hydrothermal reaction; and after the reaction, carrying out centrifugal drying to obtain the Ag-In-Zn-S/CQDs heterojunction material with different photocatalytic performance by selecting the capacity of the carbon quantum dots and the temperature of the hydrothermal reaction.