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

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 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.

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 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 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 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 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.