117results about How to "Wide light absorption range" patented technology

The invention provides an iron (III) tetracarboxyl phenyl porphyrin implanted metal organic framework composite material preparation method. The method includes: preparing FeTCPPCl from TCPP and FeCl24H2O according to a solvothermal method, and adopting the solvothermal method for implanting FeTCPPCl into a metal organic framework UiO-66 to obtain a composite material FeTCPPCl-UiO-66. By UiO-66 sensitization, light response capacity of UiO-66 is effectively improved, a light absorption range is expanded while charge separation efficiency is improved, and high catalytic activity in Photo-Fenton-like catalytic degradation is achieved. Compared with dark reaction and UiO-66, the composite material has advantages that dye RhB degradation effects are evidently enhanced through light-induced fenton-like reaction, and the RhB degradation rate reaches 100% within 90min.

The invention discloses a modified graphite phase carbon nitride photocatalyst as well as a preparation method and application thereof. The modified graphite phase carbon nitride photocatalyst is prepared from urea and salicylic acid serving as raw materials by virtue of calcination, wherein a mass ratio of urea to salicylic acid is 1:(0.002-0.02). The modified graphite phase carbon nitride photocatalyst disclosed by the invention has the advantages of being high in specific surface area, wide in light absorption range, low in electron-hole pair recombination rate, excellent in photocatalyticperformance and the like, and has multiple reactive sites, excellent application value and application prospects. The preparation method has the advantages of being simple in process, wide in raw material source, low in cost, high in preparation efficiency, high in yield and the like, is suitable for large-scale preparation and is favorable for industrial production. The modified graphite phase carbon nitride photocatalyst disclosed by the invention can be used for degrading organic pollutants, has the advantages of being simple in process, convenient to operate, low in cost, high in treatmentefficiency, excellent in degradation effect and the like, and has excellent effects of degrading the various organic pollutants.

The invention discloses a method for photocatalytic degradation of organic pollutants by using a defective metal organic framework photocatalyst, which adopts the defective metal organic framework photocatalyst to perform photocatalytic degradation on organic pollutants, wherein the defective metal organic framework photocatalyst is prepared by solvent thermal reaction under the action of an acidregulator and taking ferric trichloride hexahydrate and terephthalic acid as raw materials, and N, N-dimethyl formamide as a solvent; the defective metal organic framework photocatalyst is a defect type MIL-53 metal organic framework photocatalyst. The method for photocatalytic degradation of organic pollutants by using the defective metal organic framework photocatalyst has the advantages of simple process, convenient operation, low cost, easy recycling, high treatment efficiency, high degradation rate and the like, can achieve effective and rapid degradation of organic pollutants, and has good application prospect in the actual treatment of the organic pollutant wastewater.

The invention relates to a hydrangea flower-cluster-shaped bismuth tungstate / biocarbon composite photocatalytic material, a preparation method and an application thereof. The preparation method comprises the following steps: firstly adding biocarbon, Bi(NO3)3.5H2O and Na2WO4.2H2O into water, mixing uniformly, then adding a surface active agent to mix uniformly, and thus obtaining reaction precursor solution, wherein the proportion among Bi(NO3)3.5H2O, Na2WO4.2H2O, biocarbon and the surface active agent is (3-5)mmol:(1-3)mmol:(0.1-0.3)g:(1.2-1.8)mmol; adjusting the pH value of the reaction precursor solution to 1-3; carrying out hydrothermal reaction on the reaction precursor solution with adjusted pH value; and after the hydrothermal reaction is finished, taking out products, washing, drying and grinding to obtain the hydrangea flower-cluster-shaped bismuth tungstate / biocarbon composite photocatalytic material. The hydrangea flower-cluster-shaped bismuth tungstate / biocarbon composite photocatalytic material, the preparation method and the application have the advantages that by introduction of the biocarbon, not only can the cost be reduced and the process be simplified, but also the photocatalytic activity of the material can be improved and the degrading effect for organic pollutants is good.

The invention discloses a carbon nitride-supported molybdenum nitride nanoparticle photocatalyst, and a preparation method and an application thereof. The preparation method comprises the steps: firstly, preparing ultra-thin precursors of CN and Mo2N, and then preparing a Mo2N aqueous solution and a CN ethanol dispersion solution; and then dropping the CN ethanol dispersion solution into the Mo2Naqueous solution in a 70 DEG C oil bath, stirring and mixing, then centrifuging, washing and drying to obtain the carbon nitride-supported molybdenum nitride nanoparticle photocatalyst. The photocatalyst has the advantages of wide light absorption range, property of high decomposition of water to produce hydrogen, low electrical resistivity, fast current carrier transfer ability, high photogenerated current carrier separation ability, low current carrier recombination rate, good hydrogen evolution circulation stability and the like, is used for photocatalytic decomposition of water to producehydrogen, and has the highest hydrogen production rate reaching 0.89 [mu]mol.g<-1>.h<-1>. The preparation method has the advantages of simple operation, low cost and non-toxic used raw materials, andconforms to production of the concept of environmental protection.

The invention relates to a preparation method of a multilevel structure bismuth-containing nanometer material with a sonochemical method to obtain the multilevel structure bismuth sulfide with high specific surface area and wide light adsorption range. The preparation method comprises the following steps: adding bismuth nitrate pentahydrate and chlorine-containing ionic liquid to an organic solvent, conducting ultrasonic until all the compounds are uniformly dispersed, placing the obtained dispersion liquid in a microwave-ultrasonic wave combined reactor to take a reaction, adding thiourea in the reaction system to continue reaction, after reaction, centrifugally washing the product to remove the solvent remained on the surface and excessive organic matters, and drying the product to obtain the multilevel structure bismuth sulfide nanometer material. The preparation method of the multilevel structure bismuth-containing nanometer material has the benefits as follows: 1) the preparation method is quick in reaction rate, short in reaction time, high in product output and low in energy consumption; 2) the bismuth sulfide has the characteristics of regular morphology, uniform size, large specific surface area, wide light absorption range and the like; 3) the multilevel structure bismuth sulfide nanometer material obtained by the method disclosed by the invention has visible light response photocatalytic performance, and has better chromium photocatalytic degradation efficiency than the product titanium dioxide.

The invention discloses a Te-doped Cs2ZrCl6 perovskite derivative material and a preparation method and application thereof, and the Te-doped Cs2ZrCl6 perovskite derivative material is prepared by taking a cesium-containing compound, a zirconium-containing compound and a tellurium-containing compound as reaction reagents and taking concentrated hydrochloric acid as a solution. And the influence ofthe tellurium doping amount on the luminous efficiency is explored. The Te-doped Cs2ZrCl6 perovskite derivative material prepared by adopting a solvothermal method is good in crystallinity, stable instructure, simple and convenient in preparation process, capable of being rapidly synthesized on a large scale and high in luminous efficiency. The problem of toxicity of lead-based perovskite is effectively solved by replacing lead with zirconium; the fluorescent powder can realize 575nm broadband yellow light emission under the excitation of ultraviolet light. Good application prospects are realized in the fields of illumination, display, projection, LEDs, fluorescent probes and the like.

The invention discloses an in-situ carbon-coated copper-nickel alloy material photocatalyst and a preparation method and an application thereof. The preparation method comprises the steps: firstly, acopper-nickel bimetallic organic framework (CuNiBTC) is prepared through a hydrothermal method, and a CuNiBTC material is obtained through centrifugation, washing and drying; and vacuum sealing is carried out on a sample by using a quartz tube, and calcining is carried out at high temperature to obtain the in-situ carbon-coated copper-nickel alloy nanoparticle photocatalyst. The in-situ carbon-coated copper-nickel alloy nanoparticle photocatalyst has the advantages of wide light absorption range, high carbon dioxide reduction performance, low electrical resistivity, rapid carrier transfer capability, high photon-generated carrier separation capability, low carrier recombination rate and good carbon dioxide conversion cycle stability, is used for near-infrared light catalytic reduction of carbon dioxide, and has the carbon monoxide precipitation rate up to 11.205 [mu]mol*g<-1>*h<-1>. The preparation method is simple to operate and low in cost, the used raw materials are non-toxic, and the product has a certain economic value and conforms to production of the environmental protection concept.

The invention discloses a method for producing an H-occupied BiVO4-OVs photocatalytic material and application of the H-occupied BiVO4-OVs photocatalytic material. The production method comprises thesteps of dissolving a certain molar weight of Bi(NO3)3.5 H2O in glycerin; dissolving a certain molar weight of NaVO3.2 H2O in deionized water; mixing solutions; transferring a mixed solution into a teflon-lined high-pressure kettle, and maintaining 180 DEG C for 8 h; conducting 10000-rpm centrifugal separation on a solvothermal synthesis product, washing the solvothermal synthesis product subjected to 10000-rpm centrifugal separation with deionized water and ethyl alcohol, and drying the washed solvothermal synthesis product subjected to 10000-rpm centrifugal separation at 60 DEG C for 4 h; calcining the solvothermal synthesis product, which is thoroughly washed, in a muffle furnace at 300 DEG C for 5 h; and conducting annealing on a calcined product in an Ar / H2 atmosphere at 350 DEG C for10 h to obtain the H-occupied BiVO4-OVs photocatalytic material. The H-occupied BiVO4-OVs photocatalytic material has the advantages that a photoresponse range is wide, the catalytic activity is high, the degradation rate is high, and the hydrolysis ability is high; and solar energy can be fully and effectively used.

An embodiment of the invention relates to a photocatalyst, in particular to a double-ligand metal organic framework photocatalyst and application thereof. According to the double-ligand metal organicframework photocatalyst provided by the invention, a metal organic framework comprises double ligands including metalloporphyrin and organic ligand. According to the double-ligand metal organic framework photocatalyst provided by the invention, a double-ligand mechanism is introduced, so the separation of photo-generated holes and electrons is promoted, a light absorption range is expanded, and the photocatalytic reduction capability of CO2 can be remarkably improved.

The invention discloses a method for preparing hydrogen peroxide by using an enol-ketone type covalent organic framework / graphite phase carbon nitride composite photocatalyst. The composite photocatalyst and an electron donor solution are mixed to carry out photocatalytic reaction to obtain hydrogen peroxide, wherein the composite photocatalyst comprises an enol-ketone type covalent organic framework and graphite phase carbon nitride, and the enol-ketone type covalent organic framework is loaded on the surface of the graphite phase carbon nitride. According to the invention, the adopted composite photocatalyst has the advantages of multiple reaction active sites, wide light absorption range, low electron-hole pair recombination rate, good photocatalytic performance, good stability, environmental protection and the like, when the composite photocatalyst is used for preparing hydrogen peroxide, the yield within 1 hour can reach 880.494 [mu]mol / L, and still reaches 861.445 [mu]mol / L after five times of circulation, and the composite photocatalyst has the advantages of simple method, high preparation efficiency, high yield and the like, and can be used for large-scale preparation of hydrogen peroxide and facilitates industrial application.

The invention provides photocatalytic hydrosol with a wide light absorption and responding range and a preparation method thereof. The photocatalytic hydrosol is characterized by consisting of spherical nano WO3 / TiO2 with a core-shell structure and water, wherein the pH value of the hydrosol is ranged from 3 to 6, and nano WO3 is a core of which the average particle diameter is 5-80nm; nano TiO2 is a shell which is 5-50nm in thickness; the total particle average diameter is 10-100nm. The hydrosol is prepared by two steps of preparing nano WO3 hydrosol by a hydrothermal reaction method and then preparing hydrosol wrapped by nano TiO2 to form the nano WO3 / TiO2 hydrosol with the core-shell structure. The hydrosol with the core-shell structure, which is prepared by the preparation method, has a wide light absorption range and is high in photocatalysis capacity; as the hydrosol is an aqueous preparation, the problem of environmental pollution is solved; the preparation method has the advantages of simplicity, low cost, wide use range and the like.

The invention discloses a photocatalytic self-cleaning fabric based on nano titanium dioxide. The photocatalytic self-cleaning fabric is prepared by the following specific steps: modifying nano TiO2 by utilizing copper ions; immersing fabric treated by a biological enzyme into nano TiO2 gel; then fixing the nano TiO2 on the fabric surface through crosslinking. The photocatalytic self-cleaning fabric disclosed by the invention has the following beneficial effects: the self-cleaning effect is good, the light absorption range is wide, other properties of the fabric are not influenced, the softness is high, and the fabric is harmless to a human body; the self-cleaning efficiency is high, the durability is excellent, the needs of people are met, the grade of knitted fabric is raised, and the added value is increased; the invention is an important method for completing product properties and expanding application range of the product and has a great commercial value; in the processing process, energy consumption is low, the generated sewage is easily treated, little environmental harm is caused, the requirements for greenness and environmental protection are satisfied relatively well, and promotion is facilitated.

The invention discloses a perylene tetracarboxylic diimide-carbazole-dithienyldiazosulfide conjugated polymer the general formula of which is shown in a formula (I) as well as a preparation method and application thereof. The preparation method comprises the following steps: using 1,7-dibromo-3,4,9,10-perylene tetracarboxylic dianhydride and 3,4,5-trialkoxy-1-aminobenzene to react, thus obtaining a monomer; and under an oxygen-free condition, using the monomer, 4,7-dithienyl-2,1,3-diazosulfide dibromine and N-alkyl-carbazole diborate to perform polymerization reaction, thus obtaining the target product. The preparation method is simple, is easy to operate and control and is suitable for industrial production. The target product prepared by the method has good solubility; and when being used in the field of organic solar cells, the target product has high absorbance and wide absorption range which can extend to the near infrared region, thus the solar energy utilization rate of the product can be increased.

The invention discloses a conjugated polymer containing cyclopentadienyl diene dithiophene-naphthalene tetracarboxylic diimide, which is characterized by being a compound with the formula shown as below, wherein R1 is C1-C20 alkyl, R2 is C1-C20 alkyl or substituted phenyl, R3, R4 and R5 are identically or differently expressed as hydrogen, C1-C20 alkyl or alkoxy, x is greater than or equal to 1 and less than 2, y is greater than 0 and less than or equal to 1, the sum of x and y is 2 and n is an integer from 1 to 120. The conjugated polymer containing cyclopentadienyl diene dithiophene-naphthalene tetracarboxylic diimide is prepared via Stille with a simple reactive synthesis route and low processing requirements and has better film-forming properties, better thermal stability, high carrier mobility, higher molar absorption coefficient and wide optical absorption range, the degree of matching with solar transmission spectrum is improved, the photoelectric conversion efficiency is increased, and the conjugated polymer has a wide scope of application.

The invention discloses a fluorine copolymer containing anthracene and pyrrole-pyrrole-dione units and a preparation method and use thereof. The polymer is represented by a formula shown as in the specification. In the formula, R1 and R2 are the same or different and may be H, F, C1 to C20 alkyl or alkoxy; R3 may be H, C1 to C10 alkyl; x+y is equal to 1, x is more than 0, and y more than 0; m is an integer between 1 and 40; and n is an integer between 1 and 200. The fluorine copolymer containing anthracene and pyrrole-pyrrole-dione units is obtained by Suzuki reaction, has a low band gap, a high carrier mobility and a wide light spectrum absorption range, can improve photoelectric conversion efficiency, can be widely used; and in the synthesis method of the fluorine copolymer, the conditions are mild and easy to control.

The invention discloses polymer containing fluorene, anthracene and thienopyrazine units and a preparation method as well as application thereof. The polymer has a formula shown in the specification, wherein R1 and R2 are selected from H, F and C1-C20 alkyl groups or alkoxyl groups; R3 is selected from H and C1-C20 alkyl groups or phenyl groups; x and y meet the requirements that x+y is equal to 1, x is more than 0 and y is more than 0; m is an integer of 1-20; and n is an integer of 1-150. The polymer containing fluorene, anthracene and thienopyrazine units is obtained through easily controllable suzuki reaction with mild conditions, and has the advantages of low energy band gap, high carrier mobility, wide spectral absorption range, capability of increasing utilization efficiency of sunshine and wide application.

The invention relates to a copolymer containing cyclopentadithiophene and benzodi(benzoselenadiazole), and the structural formula is shown in the specification. In the structural formula, n is an integer between 1 to 100, and R1, R2, R3 and R4 are C1-C20 alkyl. The copolymer has the characteristics of wide light absorption scope, high carrier mobility, good solubility, good film forming property and the like, and is applicable to copolymer solar cell devices, organic electroluminescent devices, organic field effect transistors, organic optical storage and organic laser and the like. Additionally, the invention also provides a preparation method for the copolymer containing cyclopentadithiophene and benzodi(benzoselenadiazole), and the preparation method is mild in conditions, easy to control and high in product yield.

The invention relates to a black phosphorus loaded tungsten nitride nanosheet photocatalyst as well as a preparation method and application thereof. Black phosphorus crystals are prepared, and band gaps of the black phosphorus crystals are changed by a high-energy ball milling method, so that black phosphorus nanosheets are obtained; preparing tungsten nitride nanosheets, and growing the tungstennitride nanosheets on the surfaces of the black phosphorus nanosheets through a high-energy ball milling method. Compared with the prior art, the photocatalyst disclosed by the invention has a wide light absorption range; the performance of decomposing water to produce hydrogen is higher; a response also exists in a near-infrared area; cAPABILITY FOR QUICK TRANSFER OF CARRIERS, the photon-generated carrier separation capability is high; the photocatalyst has the characteristics of low carrier recombination rate, certain hydrogen evolution cycle stability and the like, is used for photocatalytic water decomposition hydrogen production, has the highest hydrogen production rate of 188.42 mu mol.g <-1 >. H <-1 > under visible light, and has the hydrogen production rate of 10.77 mu mol.g <-1 >.H <-1 > under the irradiation of light with the wavelength of greater than 700nm; the preparation method is simple to operate and low in cost, and the used raw materials are non-toxic and environment-friendly.

The invention which belongs to the optoelectronic material field discloses perylenetetracarboxylic diimide copolymers. The perylenetetracarboxylic diimide copolymers have a structural formula represented by formula (I). In the formula (I), n is an integer between 1 and 100; R1, R2 and R3 are hydrogen, C1-C20 alkyl, C1-C20 alkoxy, phenyl, or alkoxybenzene; R4 is C1-C20 alkyl; and R5 is hydrogen, C1-C20 alkyl, C1-C20 alkoxy, or phenyl. The invention also provides a preparation method and an application of the perylenetetracarboxylic diimide copolymers. The diphenyl silole unit-contained perylenetetracarboxylic diimide copolymers have the advantages of good dissolving performance, high carrier mobility, strong absorbance, wide light absorption range, and sunlight utilization rate improvement; and the preparation method which has the advantages of simple process and high yield is easy to operate and control.

The invention discloses a perovskite monocrystal material and microcrystalline silicon composite material combined thin film solar cell, and relates to a semiconductor device specially applied to converting an optical energy into an electric energy. The perovskite monocrystal material and microcrystalline silicon composite material combined thin film solar cell comprises a bottom electrode, an N type oxide semiconductor film, a perovskite monocrystal light absorption layer, a microcrystalline silicon hole transporting layer and a top electrode; the oxide semiconductor thin film is an N type zinc oxide semiconductor thin film obtained by sputtering; the perovskite monocrystal light absorption layer is a light absorption material of a perovskite structure; the hole transporting layer is a P type microcrystalline silicon composite material obtained by chemical vapor deposition; and the bottom and top electrodes are films made of aluminum or silver and obtained by thermal evaporation. According to the perovskite monocrystal material and microcrystalline silicon composite material combined thin film solar cell and a preparation method thereof, the perovskite monocrystal is taken as the light absorption material and the P type microcrystalline composite material is taken as the hole transporting layer, so the more stable and more efficient solar cell is obtained.

The invention discloses a defective metal organic framework photocatalyst and a preparation method thereof. The defective type metal organic framework photocatalyst is a defective MIL-53 metal organicframework photocatalyst. The preparation method comprises the following steps: with ferric trichloride hexahydrate and terephthalic acid as raw materials and N,N-dimethylformamide as a solvent, carrying out solvothermal reaction under the action of an acid regulator to prepare the defective metal organic framework photocatalyst. The photocatalyst has the advantages of being uniform in mesoporousstructure, high in specific surface area, wide in light absorption range, small in forbidden band width, large in photocurrent, small in impedance, high in photocatalytic activity and the like. The catalyst is a novel visible-light photocatalyst, which is novel in morphology and structure and excellent in photocatalytic performance, and has very good use value and application value. The preparation method has the advantages of simple process, convenience in operation, low cost and the like, is suitable for large-scale preparation and is beneficial to industrial application.

The invention discloses a perylene diimide-fluorene-thiophene and (3, 4-b) pyrazine conjugated polymer shown in a general formula (I) and a preparation method and application thereof. The invention comprising the following steps: causing 1, 7-dibromo-3, 4, 9, 10-perylene tetracid anhydride to react with 3, 4, 5-trialkyl (tri-oxygroup)-1-anline to obtain a monomer; then causing a 3', 4'-diamido-2,2': 5', 2''-terthienyl compound to react with a benzil compound to obtain a midbody; and then causing the midbody to react with N-bromosuccinimide to obtain another monomer; and under the oxygen-freecondition, causing the two monomers and the bi-boric acid ester to conduct polymerization to obtain a target product. The preparation method is simple, easy to operate and control, and suitable for industrialized production; the target product prepared by the method has good dissolubility, has strong absorbance and wide absorption range when being used in the field of organic solar cell, and can be extended to a near infrared region, thus improving the utilization rate of the sunlight.

The invention discloses a preparation method and application of a porphyrin-metal organic framework material. The preparation method of the porphyrin-metal organic framework material comprises the following steps: dissolving a mixture of Ti (OBu) 4, Pt-TCPP and benzoic acid into DEF, and stirring for 20-35 minutes at room temperature; heating the mixture at 100-150 DEG C for 5-7 days, centrifugingthe obtained product, washing with acetone for 3 times, and drying at 35-50 DEG C in vacuum for 5-8 hours; and reducing the dried solid for 2-5 h at the temperature of 200-240 DEG C under hydrogen, and obtaining the porphyrin-metal organic framework material. According to the porphyrin-metal organic framework material prepared by the method, the distance from a photo-generated charge carrier to areaction center can be shortened, the photo-generated electron transfer and separation speed is increased, photocatalytic hydrogen production can be promoted, and the hydrogen production rate is as high as 32332.8 [mu] mol g <-1 > h <-1 >.

The invention discloses a thiophene-containing perylene tetracarboxylic diimide copolymer, and a preparation method and application thereof. The thiophene-containing perylene tetracarboxylic diimide copolymer has a general molecular structural formula shown in (I), wherein n is an integer ranging from 1 to 200; R1, R2 and R3, the same or different, are selected from -H, C1-C15 alkyl, and C1-C15 alkoxy benzene or phenyl; R4 and R5, the same or different, are selected from C1-C15 alkyl, C1-C15 alkoxy, and C1-C15 alkoxy benzene or phenyl; and R6 and R7, the same or different, are selected from C1- C15 alkyl, C1-C15 alkyloxy, and C1-C15 alkoxy benzene or phenyl. The thiophene-containing perylene tetracarboxylic diimide copolymer disclosed by the invention has the advantages of high solubility, high carrier mobility, strong absorbance and wide light absorption range, and improves the utilization rate of sunlight. The preparation method of the thiophene-containing perylene tetracarboxylic diimide copolymer is simple in process, high in produce yield, and easy to operate and control.

A preparation method of inverse opal material for visible-light-driven photocatalytic degradation of organic pollutants includes 1) using titanium dioxide precursor as raw material, preparing nitrogen-doped titanium dioxide inverse opal by one-step process in the presence of nitrogen source, and 2) in the presence of reducing agent, using the nitrogen-doped titanium dioxide inverse opal, selenium precursor, and cadmium precursor as raw materials to prepare the cadmium selenide sensitized nitrogen-doped titanium dioxide inverse opal.

The invention discloses benzothiophene unit-containing perylene diimide copolymer with the molecular structural general formula (I), and a preparation method and application thereof. In the formula, n is an integer ranging from 1 to 100; R1, R2 and R3 are selected from -H, alkyl with 1 to 20 carbon atoms, alkoxy with 1 to 20 carbon atoms and phenyl; and R4 and R5 are selected from alkyl with 1 to12 carbon atoms and alkoxy with 1 to 20 carbon atoms. The copolymer has good solubility, high absorbance, wide absorption range capable of extending to a near infrared region, and good charge transfer property, and improves the utilization rate of sunlight; and the preparation method is simple, easy to control and implement, and suitable for industrial production.

The invention discloses a super black material and a preparation method and application thereof, and belongs to the technical field of nanometer material preparation. The super black material is composed of a base copper nanometer cluster and a graphitized carbon layer supported on the surface thereof, and the super black material forms the core-shell structure and is composed of, by weight: 51.9%to 84.3% of the copper nanometer cluster and 15.7% to 48.1% of carbon. By using the copper 4-pentanedionate hydrate as an elementary material, the super black material and preparation method and application thereof coats the surface of the copper nanometer cluster with the graphitized carbon layer to form a unique core-shell structure. The obtained super black material is characterized by excellent light absorption, and has significant optical loss effect caused by surface effect and quantum effect. The absorption range of the copper nanometer cluster or the super-black carbon material is soextensive that the copper nanometer cluster or the super-black carbon material has good light absorption performance at the wavelength of 200-900 nm; and the preparation method of the super black material is easy to operate, low in cost of finished products and process cost and conducive to industrial production, and the process conditions are easy to control.

The invention discloses a Mn-doped (Cs / K)3BiCl6 perovskite derivative material prepared by taking a cesium-containing compound, a manganese-containing compound, a potassium-containing compound and a bismuth-containing compound as reaction reagents and concentrated hydrochloric acid as a solution through a solvothermal method, and the influence of the Mn doping amount on the luminous efficiency is explored. The invention further provides a preparation method of the Mn-doped (Cs / K)3BiCl6 perovskite derivative material. The prepared Mn-doped (Cs / K)3BiCl6 perovskite derivative material is good in crystallinity, stable in structure, simple and convenient in preparation process, capable of being rapidly and massively synthesized and high in luminous efficiency. The toxicity problem of the lead-based perovskite is effectively solved by replacing lead with potassium and bismuth; and the fluorescent powder can realize emission of 603 nm broadband orange light under the excitation of ultraviolet light. The Mn-doped (Cs / K)3BiCl6 perovskite derivative material has good application prospects in the fields of illumination, display, projection, LEDs, fluorescent probes and the like.

The invention discloses a double-electrode photoelectrochemical aptamer sensor as well as a preparation method and application thereof. The sensor comprises a first conductive glass electrode modified by a ternary composite material and used as a working electrode, a specific aptamer probe used as a counter electrode, and a second conductive glass electrode modified by reduced graphene oxide loaded with gold nanoparticles. The preparation method comprises the steps of preparing the working electrode and the counter electrode. The dual-electrode photoelectrochemical aptamer sensor has the advantages of high stability, long service life, strong anti-interference capability, high detection sensitivity, wide detection range, low detection limit and the like, can realize specific detection of pollutants (such as antibiotics) in media such as water bodies and organisms, and is high in utilization rate, high in use value and good in application prospect; and meanwhile, the preparation method has the advantages of simple process, convenience in operation, safety, low cost, no pollution, high preparation efficiency and the like, is suitable for large-scale preparation and is beneficial to industrial application.