19results about How to "Broad absorption spectrum" patented technology

The invention belongs to the field of photodynamic therapy, and particularly discloses a vitamin K eutectic material for photodynamic therapy and a preparation method of the vitamin K eutectic material. The vitamin K eutectic material takes vitamin K as an electron acceptor, two para-position carbonyl groups on a quinonoid six-membered ring of the vitamin K enable the vitamin K to show an electron-deficient property, and the vitamin K and the electron acceptor form an organic charge transfer compound and are self-assembled to form eutectic, so that the absorption spectrum of a system is widened, light with a wider wave band is more effectively utilized, and the utilization rate of the light is improved. The photodynamic therapy response wavelength of the vitamin K is adjusted from an ultraviolet region to a visible region and a near-infrared region, so that the problem of light damage caused by low penetration depth due to photodynamic therapy by using light in the ultraviolet region is avoided, and the vitamin K has excellent photodynamic performance and can be applied to the field of photodynamic therapy. The method has a good application prospect in surface sterilization and disinfection based on visible light or near-infrared light illumination, body surface infection treatment and directional cancer treatment.

The invention discloses a pyrrolopyrrole cyanine free radical photo-thermal material with high photo-thermal conversion efficiency as well as a preparation method and application of the pyrrolopyrrole cyanine free radical photo-thermal material. The synthesis method comprises the following synthesis steps: carrying out a reaction on a raw material TPA-CN and diisopropyl succinate to obtain a pyrrolo-pyrrole compound DPP-TPA, and further carrying out a condensation reaction on the pyrrolo-pyrrole compound DPP-TPA and 2-(5-tert-butylbenzoxazole) acetonitrile to obtain a compound H-PPCy-TPA. The H-PPCy-TPA can generate carbon free radicals, and the solid absorption peak edge can reach 1000 nm. Under the irradiation of one simulated sunlight (1 kW. M <-2 >), the water vapor efficiency of the interface water evaporation device based on H-PPCy-TPA1 / sponge is 98.6%, and the water evaporation rate is 1.435 kg.m <-2 >. H <-1 >; the H-PPCy-TPA1 is applied to an integrated device for thermal power generation, and the maximum voltage reaches 224 mV; the H-PPCy-TPA1 is used for a water and electricity integrated device, the water evaporation rate is 1.172 kg.m <-2 >. H <-1 >, and the maximum voltage reaches 180 mV.

The invention discloses a dithiin functionalized metal organic framework photo-thermal material, a free radical metal organic framework photo-thermal material as well as a preparation method and application of the dithiin functionalized metal organic framework photo-thermal material. Tetrathio anthracene is used as a linking group to directionally connect a trinuclear iron oxide cluster into a ring, tripyridyl amine is connected with an Fe atom in the ring to enable the trinuclear iron oxide cluster to be 9-coordinate connection, and the formed MOF has good hydrophilicity and wide light absorption range; a stable frame structure is provided, and a one-dimensional pore channel structure provides a channel for water conveying; therefore, the solar energy which is very easy to obtain is converted into heat energy for water evaporation; and sulfur-containing unsaturated double bonds in the tetrathio-anthracene are used as modifiable groups, and are subjected to ring shrinkage after high-temperature annealing to form a framework with stable free radicals, so that a relatively wide absorption spectrum is shown, absorption of sunlight is facilitated, and the material is endowed with extremely high photo-thermal conversion capacity. The dithiin functionalized metal organic framework photo-thermal material can be prepared through solvothermal reaction. The preparation process is simple and easy for large-scale preparation.

The application discloses a preparation method of carbon dot material based on blue bacteria, and the carbon dot material is prepared by taking blue bacteria photosystem pigment as raw material. The semiconductor fluorescent carbon dot prepared by the method has stable properties, has wide spectrum absorption to sunlight, can convert ultraviolet light, visible light and infrared light into red light, and has good photoelectric performance. The application further discloses a preparation method of a blue bacteria-based semiconductor fluorescent carbon dot-blue bacteria hybrid, and application of the carbon dot material based on blue bacteria in crop production.

The invention belongs to the technical field of photocatalyst preparation, and particularly relates to a visible light response photocatalyst DTIDT-NC / g-C3N4 as well as a preparation method and application thereof. The photocatalyst is of a heterostructure formed by an organic semiconductor DTIDT-NC and g-C3N4, and the structural formula of the organic semiconductor DTIDT-NC is as shown in the formula 5. Indenodithienothiophene (DTIDT) is used as a core D unit, cyano naphthyl indanone is used as an A unit, an acceptor (A)-donor (D)-acceptor (A) type organic semiconductor DTIDT-NC is designed and synthesized, the acceptor (A)-donor (D)-acceptor (A) type organic semiconductor DTIDT-NC is compounded with g-C3N4 to construct the DTIDT-NC / g-C3N4 heterojunction photocatalyst, the absorption spectrum of g-C3N4 is widened, compounding of photo-induced electrons and holes is inhibited, the photocatalyst is used for hydrogen production through water photolysis, and the photocatalytic activity of the photocatalyst is improved. More excellent water photolysis hydrogen evolution performance is shown. # imgabs0 #

The invention provides a 1, 4-fullerene C60 derivative and a preparation method thereof. The preparation method of the fullerene C60 derivative comprises the following steps: sequentially adding an organic solvent and a tetrabutyl ammonium hydroxide (TBAOH) solution into a reaction flask, introducing inert gas as shielding gas, adding an ester organic matter and fullerene C60, stirring at 25-60 DEG C, then adding iodine into the system, ending the reaction after a period of time, spin-drying the solvent through a rotary evaporator, and obtaining the fullerene C60 derivative. Carrying out acetonitrile precipitation treatment and filtering to obtain a crude product; and dissolving the crude product in toluene, and separating and purifying by high performance liquid chromatography to obtain the fullerene derivative. The preparation method of the fullerene derivative is simple to operate, mild in reaction condition, safe, easy to control, efficient and high in selectivity. # imgabs0 #

The present invention relates to the technical field of quantum dot light-converting agricultural film, and in particular to a rare earth-doped quantum dot composite light-converting agricultural film and a preparation method thereof. The light-converting agricultural film comprises a light-converting masterbatch with a mass fraction of 0.2-5% and a polymer matrix with a mass fraction of 95-99.8%; the light-converting masterbatch comprises a red quantum dot light-converting agent with a mass fraction of 10-50%, a green rare earth light-converting agent with a mass fraction of 1-5%, an auxiliary agent with a mass fraction of 1-10%, and a masterbatch matrix, and the red quantum dot light-converting agent is at least one of perovskite quantum dots, II-VI group quantum dots, III-V group quantum dots, IV-VI group quantum dots, carbon quantum dots, and silicon quantum dots; and the green rare earth light-converting agent comprises at least one of Tb, Dy, Ce, Ho, and Pr elements. The advantage is that by adding green rare earth materials, the green rare earth materials absorb energy under the irradiation of sunlight and transfer the energy to the red light quantum dots, thereby enhancing the luminous intensity of the quantum dots.

The invention discloses a carbon quantum dot photosensitizer, an extracellular vesicle prepared from the carbon quantum dot photosensitizer and application of the carbon quantum dot photosensitizer. The carbon quantum dot photosensitizer is prepared by a method comprising the following steps: uniformly dispersing a polythiophene derivative in a sodium hydroxide aqueous solution to obtain a solution A; heating the solution A for reaction; and after the reaction is finished, cooling to room temperature, taking out the solution, and filtering and dialyzing to obtain the carbon quantum dot photosensitizer. According to the technical scheme, the problems that extracellular vesicles are complex and tedious in preparation and difficult in mass production are solved, and the method is simple in process, good in universality, low in time consumption and low in cost.

The application discloses a balsa wood / poly-p-phenylenediamine / polyvinyl alcohol solar energy evaporator and a preparation method thereof. NaClO2 and CH3COOH remaining in delignified balsa wood are used as oxidants to drive in-situ polymerization of p-phenylenediamine in a delignified balsa wood matrix, and the reuse of NaClO2 and CH3COOH is realized. The balsa wood / poly-p-phenylenediamine / polyvinyl alcohol evaporator prepared by the application has the characteristics of wide spectrum absorption, fast water transport, effective heat confinement and effective reduction of water evaporation enthalpy, and exhibits excellent solar energy driven interface water evaporation performance.

The invention provides a dimer acceptor material based on an electron-withdrawing bridging unit as well as a preparation method and application of the dimer acceptor material. The structural general formula of the dimer type acceptor material is (I), and the dimer type acceptor material is constructed by taking a benzotriazole unit with electron-withdrawing capability as a central core and taking a planar rigid unit with electron-withdrawing capability as a bridging unit. The acceptor material has a relatively high glass transition temperature and a relatively low diffusion coefficient. The material is used in a photoelectric functional device, can stabilize the film morphology of an active layer, and finally can effectively improve the stability of the device, for example, as an active layer acceptor material of an organic solar cell, can promote commercial application of the organic solar cell.

The invention provides a preparation method of a composite photocatalytic material for degrading sulfamethoxazole, which comprises the following steps: (1) loading linear poly [(2, 5-dibromo-4-carbonyl thiophene)-(2, 5-diamido thiophene)] on the surface of a foamy copper matrix; (2) converting the linear poly [(2, 5-dibromo-4-carbonyl thiophene)-(2, 5-diamido thiophene)] into a cross-linked poly [(2, 5-diaminodifluorophenyl-4-carbonyl thiophene)-(2, 5-diamido thiophene)], and (3) converting the cross-linked poly [(2, 5-diaminodifluorophenyl-4-carbonyl thiophene)-(2, 5-diamido thiophene)] into a cross-linked poly [(2, 5-diaminodifluorophenyl-4-carbonyl thiophene)-(2, 5-diamido thiophene)]. And step [3], assembling a Bi2GdO3SeI nanocrystal on the surface of the cross-linked poly [(2, 5-diaminodifluorophenyl-4-carbonyl thiophene)-(2, 5-diamido thiophene)]. The photocatalytic degradation material prepared by the method has photocatalytic degradation properties such as wide absorption spectrum, high photocatalytic activity and high stability.

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 belongs to the technical field of organic solar cell materials, and discloses an asymmetric small molecule receptor photovoltaic material and a preparation method and application thereof. According to the present invention, five kinds of the asymmetric small molecule receptor materials, i.e., IDT-S-4F, IDT-S-4Cl, IDT-S-2F2Cl, IDT-S-2Cl2 F and IDT-2Cl2 F, are synthesized; according to the present invention, the J-V test results show that the asymmetric small molecule receptor PM6: X (X = IDT-S-4F, IDT-S-2F2Cl, IDT-S-2Cl2F) has characteristics of high fill factor and high current density; the Paios test result shows that the acceptor has higher charge carrier mobility, more sensitive photocurrent response speed, better inhibition of bimolecular recombination and trap-assisted recombination, and higher exciton dissociation and charge recombination efficiency. A DFT (Discrete Fourier Transform) result shows that the acceptor material has a smaller dihedral angle, which is beneficial to intermolecular accumulation, so that the material has better carrier mobility. Various tests show that construction of the asymmetric small molecule receptor is a strategy for improving the performance of the device.

The preparation method comprises the following steps: S1) extracting lignin in ginkgo leaves by using an alkali dissolution and acid precipitation method, performing rough filtration to filter impurities, centrifuging the filtrate to obtain a precipitate, washing the filtrate for multiple times by using deionized water, then performing centrifugation again to obtain a precipitate, and drying the precipitate to obtain a crude extract; uniformly mixing the lignin precipitate with deionized water in proportion to obtain a lignin extracting solution; s2) soaking basil seeds in water, enabling basil fibers to fully absorb water and swell, stirring and extracting at a high speed, and filtering to obtain a basil fiber extracting solution; s3) mixing and heating the lignin extracting solution and the basil fiber extracting solution, keeping the temperature and homogenizing until the solution state is stable and uniform; s4) homogenizing the coarse homogenized liquid in a micro-jet homogenizer; and S5) sterilizing the homogenized liquid at high temperature and high pressure to obtain the plant sunscreen raw material.

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 application discloses a conjugated non-fullerene acceptor material with azaparacyclophanquinone as a core, and a structural general formula is shown as formula I: wherein R1 and R2 are C m H 2m+1 , m is greater than or equal to 1 and is an integer; and X is any one of H, F, Cl, Br and CN. The acceptor material has excellent performance, three-dimensional charge transport characteristics and good intermolecular stacking effect, and high electron mobility. When the material is applied to a binary organic photodetector, the material exhibits excellent near-infrared light detection performance, including high specific detectivity, high responsivity, fast response speed and low dark current density.

The application discloses a heteroatom conjugated extended asymmetric viologen derivative, a preparation method thereof and application of the viologen derivative in a black electrochromic device, and has the general structure as shown in the following formula: wherein Ar represents a benzothiadiazole or a thiophene heteroatom conjugated bridging unit, R1 is a benzyl aromatic substituent, and R2 is a polymerizable alkenyl functional group. The viologen molecule is designed through a conjugated skeleton of "acceptor-bridge-acceptor", a molecular internal charge transfer effect is significantly enhanced, and a reduced state absorption spectrum is effectively widened. The viologen molecule is compounded with a complementary agent for an electrochromic device, spectrum complementary absorption of the two in an ultraviolet-visible light region is utilized, full spectrum coverage in a visible light band is realized, and a high-performance black electrochromic effect is obtained. The material system has wide application prospects in the fields of flexible intelligent display, self-adaptive camouflage, full-shading intelligent window and the like.

The invention provides a preparation method of a composite catalytic material capable of degrading rhodamine B in organic wastewater. The preparation method comprises the following steps: (1) loading isodecyl acrylate on the surface of a foam iron matrix; (2) synthesizing poly (acrylamide-iso-decylacrylate) on the surface of the foam iron matrix by utilizing a polymerization reaction between an acrylamide monomer and an iso-decylacrylate monomer; and (3) assembling a BiCu2O6STe5 / Bi2BrTmO4 nano crystal on the surface of the poly (acrylamide-iso-decylacrylate). The composite catalytic material prepared by the method disclosed by the invention has a wide absorption spectrum and excellent and stable performance of photo-thermally activating peroxymonosulfate to degrade rhodamine B organic dye.

The application discloses an aggregation-induced emission material, a preparation method and application thereof, and belongs to the technical field of preparation of the aggregation-induced emission material. The aggregation-induced emission material prepared by the application is an organic small molecule with an aggregation-induced emission effect. The fluorescent solar concentrator prepared by using the aggregation-induced emission material overcomes the problem of low efficiency of the existing fluorescent solar concentrator, and especially overcomes the problem of great efficiency attenuation caused by the increase of the device size.