234 results about "Charge separation" patented technology

The invention is suitable for the technical field of photocatalyst preparation, and provides a modified tubular g-C3N4 loaded Ni-CoP photocatalyst and a preparation method thereof. The preparation method comprises the following steps: calcining a carbon nitride precursor in stages to obtain tubular carbon nitride, stirring the tubular carbon nitride with a cobalt and nickel-containing compound and an alkaline compound, washing and drying to obtain a precipitate, calcining, mixing and grinding with a phosphorus-containing compound, calcining again, and modifying the product with polydopamine and polypyrrole to obtain the composite material. The photocatalyst modified by the polydopamine and the polypyrrole and loaded with the Ni-CoP by taking the tubular g-C3N4 as the carrier is obtained. According to the invention, three-in-one synergistic integration of'carrier-modifier-cocatalyst 'is realized, the prepared photocatalyst still keeps tubular morphology and has a larger specific surface area, the requirements of anode oxygen evolution reaction (OER) on rapid charge separation and transmission can be met, meanwhile, the light absorption range is widened, the solar energy utilization rate is increased, and a foundation is laid for efficient OER reaction.

The invention relates to the technical field of electroluminescence, and discloses a laminated organic light-emitting device and application thereof, and the laminated organic light-emitting device comprises an anode layer, a first light-emitting unit, an electron transport layer, an interface modification layer, a connection layer, a second light-emitting unit and a cathode layer which are sequentially arranged from bottom to top; the electron transport layer comprises a hole blocking layer and an n-type electron transport layer; wherein the n-type electron transport layer is composed of an n-type dopant and an organic electron transport material, has the functions of electron transport, charge separation and injection and regulation and control of the optical microcavity effect of the laminated device, can simplify the electron transport and connection layer structure of the laminated device, and effectively improves the conductivity of the laminated device; according to the laminated organic light-emitting device, the voltage drop of the body is obviously reduced, and the interface electron injection barrier is reduced, so that the laminated organic light-emitting device has the advantages of low driving voltage, high efficiency and long service life, and the effect of adjusting the optical microcavity of the device can be achieved by utilizing the n-type electron transport layer.

The invention relates to preparation of a crystalline allyl covalent organic framework material and application research of the crystalline allyl covalent organic framework material in benzamide cyclization green photocatalytic conversion. The SF-COF material is prepared by adopting a step-by-step synthesis method. The preparation method comprises the following steps: synthesizing a COF precursor by taking 1, 3-benzenetricarboxaldehyde and p-aminophenylacetonitrile as raw materials, and preparing the allylation covalent organic framework material with the electronic push-pull effect from the COF precursor and 5, 5 ', 5'-(benzene-1, 3, 5-triyl) tri (thiophene-2-formaldehyde) through a solvothermal method. The material is applied to the field of photocatalytic organic conversion, and benzamide cyclization and conversion of derivatives of benzamide are achieved under irradiation of a blue light LED. The prepared SF-COF has the advantages of efficient charge separation and electron conduction performance, good structural stability and chemical stability and the like. And a catalyzed organic reaction substrate has the advantages of wide universality range, good cycle stability and the like, and shows excellent photocatalytic conversion capability.

The application discloses a preparation method and application of a ferroelectric full water-splitting photocatalyst. The preparation method comprises the following steps: S1: pretreating a ferroelectric material to obtain a pretreated ferroelectric material; S2: after atomic layer deposition of the pretreated ferroelectric material and a metal organic complex source material, non-active gas I is introduced to perform blowing I, water is introduced, non-active gas II is introduced again to perform blowing II, and the first deposition is completed; and S3: according to the thickness of the ferroelectric full water-splitting photocatalyst, the step S2 is circularly performed to obtain the ferroelectric full water-splitting photocatalyst. The ferroelectric material can efficiently photocatalyze full water splitting through accurate regulation and modification of the surface of the ferroelectric material by the atomic layer deposition technology. The method not only provides an experimental basis for researching the limiting factors of the ferroelectric material in a photocatalytic reaction, but also provides a new idea for constructing an efficient photocatalyst by using efficient charge separation and depolarization electric field of the ferroelectric material.

The invention belongs to the technical field of reverse osmosis membranes, and relates to a visible-light-responsive carbon nitride / zinc oxide heterojunction modified reverse osmosis membrane and a preparation method thereof.The method specifically comprises the steps that porous ultrathin carbon nitride nanosheets are prepared; synthesizing zinc oxide nanoparticles rich in oxygen vacancies; and compounding the two to form the Z-type heterojunction photocatalyst. The heterojunction is stably loaded in a polyamide separation layer through an interfacial polymerization process, the composite reverse osmosis membrane is prepared, and the membrane disclosed by the invention has a remarkable visible light response characteristic while maintaining a high desalination rate. The method has the core advantages that the visible light utilization rate and the photo-generated charge separation efficiency are remarkably improved through the construction of the heterojunction, so that the membrane can actively and efficiently degrade organic pollutants under illumination, self-cleaning is realized, the anti-pollution capacity is greatly improved, and the chemical cleaning period is greatly prolonged.

The invention relates to the technical field of photocatalytic materials, in particular to a multi-ion doped TiO2 nanosheet material suitable for degradation of dyes in water and a preparation method of the multi-ion doped TiO2 nanosheet material. The preparation method comprises the following steps: pre-embedding a self-sacrifice template in a germanium-tungsten composite doping solution, carrying out hydrothermal conversion to construct a Ge-W synergetic optimized regular TiO2 substrate, carrying out atomic layer deposition to realize nitrogen / silver uniform doping, and carrying out synergetic surface modification on silver nitrate-ethanolamine and perfluorosilane to prepare the TiO2 nanosheet material. Germanate serves as lattice strain guidance to guide TiO2 lattice growth to form a low-defect matrix, tungstate is cooperatively doped in the matrix to construct a strong built-in electric field to improve the charge separation efficiency, Ge-W elements cooperate to stabilize a bulk phase and a grain boundary, and a gradient protection barrier is constructed with selective shielding of a fluorosilane layer. The TiO2 catalyst is synergistically improved in the aspects of high catalytic activity and long-acting environmental stability, and is suitable for efficient pollutant purification in a complex water quality environment.

The application discloses a kind of efficient silicon-based water-voltage devices and preparation method thereof, the silicon-based water-voltage device is composed of positive electrode, hole selective transport layer, silicon nanostructure, silicon substrate and negative electrode from top to bottom, the top end part of the silicon nanostructure is embedded in the hole selective transport layer.This application introduces hole selective transport layer in the interface of silicon nanostructure / positive electrode, uses the internal electric field formed by high work function hole selective transport layer in interface to prevent the migration of electron to positive electrode, realizes the selective transport of hole, reduces interface recombination loss to improve charge separation and collection efficiency;At the same time, the hole selective transport layer introduced realizes the transition of silicon nanostructure and positive electrode from point contact to surface contact, reduces the contact resistance of positive electrode interface, further promotes the efficient transport of hole at interface, thereby increases the collection efficiency of electrode to hole, under the synergistic effect of the above, effectively improve the electrical properties of silicon-based water-voltage device.

The application discloses a gradient-doped BiVO4 / WO3 photoanode material and a preparation method and application thereof, and relates to the technical field of photoanode materials. 6+ The gradient-doped BiVO4 / WO3 photoanode material comprises a BiVO4 / WO3 heterojunction, and variable-valence transition metal ions are doped on the surface of the BiVO4 / WO3 heterojunction and the interface between BiVO4 and WO3, wherein the variable-valence transition metal ions comprise one of Mo 2+ and Co. The application adopts the above gradient-doped BiVO4 / WO3 photoanode material and the preparation method and application thereof, introduces variable-valence transition metal elements between the interface of BiVO4 and WO3, promotes the formation of an electron transport fast channel in a bulk phase, and improves the charge separation and transport efficiency of the BiVO4 / WO3 heterojunction interface; meanwhile, the variable-valence transition metal elements are constructed on the surface of the photoanode material, a CoOOH cocatalyst layer is formed on the surface, the cocatalyst layer and the interface electron transport fast channel synergistically act, the photo-generated charges of the BiVO4 / WO3 heterojunction bulk phase and surface are efficiently separated and transported, and therefore, the photo-catalytic efficiency is improved, and the service life of the photoanode material is prolonged.

The invention relates to the technical field of semiconductors, in particular to a gallium oxide nanowire / porous gallium nitride heterojunction and a preparation method and application thereof. The method comprises the following steps: sequentially growing a GaN buffer layer, a u-GaN layer and a p-GaN layer on a substrate to obtain a base; in mixed gas of hydrogen and inert gas, performing thermal decomposition on the substrate to obtain porous gallium nitride; heating the porous gallium nitride in mixed gas of oxygen and inert gas to obtain a gallium oxide / porous gallium nitride heterojunction; spraying gold on the surface of the gallium oxide / porous gallium nitride heterojunction, and annealing the gold into gold particles in an inert atmosphere; in mixed gas of oxygen and inert gas, a gallium source is arranged beside the gallium oxide layer in the previous step for heating, and the gallium oxide nanowire / porous gallium nitride heterojunction is obtained. The prepared heterojunction has excellent carrier transport characteristics, light absorption efficiency and charge separation capability, and is suitable for the fields of solar-blind ultraviolet photoelectric detection, photocatalysis, high-sensitivity sensors, high-power electronic devices and the like.

The invention discloses a Bi2WO6 / g-C3N4 heterojunction photocatalyst as well as a preparation method and application of the Bi2WO6 / g-C3N4 heterojunction photocatalyst. The Bi2WO6 / g-C3N4 heterojunction photocatalyst is prepared from Bi2WO6 particles and a g-C3N4 nanosheet, and a Z type heterojunction is formed between the Bi2WO6 particles and the g-C3N4 nanosheet. According to the Bi2WO6 / g-C3N4 (BCN) photocatalyst, through collaborative optimization of a heterojunction structure and surface engineering, the visible light absorption range is widened, the charge separation efficiency is improved, and active sites are enriched, the catalyst has rich surface hydroxyl groups and oxygen vacancies and a hierarchical mesoporous structure, the adsorption capacity on ZEN is enhanced, and the photocatalytic activity of the photocatalyst is improved. Separation and transfer of photon-generated carriers are promoted, and catalytic reaction kinetics is improved; compared with single g-C3N4 or Bi2WO6, the degradation rates of ZEN are respectively increased by 2.51 times and 12.57 times, and the degradation efficiency reaches 99.4%.

This invention discloses a frustum-shaped flexible photoelectric energy conversion module, comprising an optical fiber connector, a housing, and a photovoltaic cell. The optical fiber connector is fixedly disposed on the top of the housing. A frustum-shaped cavity is formed within the housing, and the photovoltaic cell is fixed within the cavity. The photovoltaic cell is a three-dimensional flexible energy transfer chip comprising multiple sub-cells connected in series. Each sub-cell comprises multiple arrayed nanowires with a radial PIN structure. A wire interface is provided on the housing. The input end of the photovoltaic cell is connected to an external input device via the optical fiber connector, and the output end of the photovoltaic cell passes through the wire interface and is connected to a power-consuming device. In this invention, the use of a nanowire array structure for the sub-cells increases the specific surface area, expands the longitudinal absorption area, saves projected area, reduces volume, and improves heat dissipation. Simultaneously, the nanoarray structure can significantly improve the light-harvesting capability and charge separation efficiency of the cell.

The invention belongs to the field of photocatalysis, and particularly discloses a perovskite composite photocatalyst for photocatalytic ethanol dehydrogenation and application. The composite photocatalyst takes a CdS nanorod as a carrier, a Cs2AgBiBr6 double perovskite active component formed by CsBr, AgBr and BiBr3 precursors is loaded on the surface of the CdS nanorod through a vacuum in-situ growth method, and a Pt, Rh or Ni metal cocatalyst can be further loaded. The method comprises the following steps: dispersing a CdS nanorod and a perovskite precursor in a mixed organic solvent, carrying out vacuum freezing-air exhaust circulation treatment, and removing the solvent under a heating condition to prepare the composite photocatalyst. When the photocatalyst is used for an ethanol photocatalytic dehydrogenation reaction under an anaerobic condition, hydrogen, acetaldehyde and acetal can be efficiently generated under the irradiation of visible light. According to the method, the photo-generated charge separation efficiency and the reaction stability are remarkably improved, and a new way is provided for ethanol high-valued conversion.

The invention discloses a charged hollow fiber loose nanofiltration membrane as well as a preparation method and application thereof. The hollow fiber nanofiltration membrane comprises a supporting layer and a charged separation layer, and the charged separation layer is attached to the inner surface of the hollow fiber supporting layer and is co-extruded and molded by adopting a double-layer spinneret plate; the charge separation layer comprises a charge polymer and a matrix polymer, and a positively charged polymer or a negatively charged polymer is selected according to an entrapment dye; the negatively charged separation layer further comprises hydroxylated polyether sulfone; the charged hollow fiber loose nanofiltration membrane is prepared by preparing an inner-layer membrane casting solution and an outer-layer membrane casting solution, carrying out co-extrusion molding through a double-layer spinneret plate, carrying out phase inversion membrane formation and then carrying out post-treatment. During application, corresponding charged nanofiltration membranes can be selected according to the electrical properties of dyes in sewage, efficient selective interception of different charged dyes is achieved, meanwhile, high transmittance is achieved for inorganic salt, the technological process of a one-step continuous forming process is simplified, the production efficiency is high, the method can be compatible with an existing hollow fiber membrane production line, and industrialization is easy to achieve.

The application relates to an In2O3 / PPy / g-C3N4 heterojunction material synthesized by a solvothermal method and an in-situ polymerization method, which is used for detecting CO2 gas under room temperature and visible light irradiation. The composite material combines the unique electronic properties of In2O3, the high conductivity of PPy and the good visible light absorption characteristics of g-C3N4, improves the photo-generated charge separation efficiency through the heterojunction effect, and significantly improves the detection performance of CO2. The sensing material not only has high sensitivity, low detection limit, good stability and reusability, but also is environment-friendly, conforms to the environmental protection development trend, and has wide application prospects in the fields of environmental monitoring and the like.

The application relates to the field of catalytic materials, and particularly discloses a photocatalytic composite material, a preparation method thereof and application of the photocatalytic composite material in reduction of carbon dioxide. The photocatalytic composite material is a g-C3N4 composite material co-modified by an amino-functionalized ionic liquid and a metal oxide. The g-C3N4 is modified by the amino-functionalized ionic liquid and the metal oxide, the charge separation efficiency of the g-C3N4 is improved, new catalytic sites are introduced on the surface of the g-C3N4, and the activity of the g-C3N4 in catalyzing and reducing carbon dioxide is greatly improved. The photocatalytic material is used to effectively solve the problems that the photocatalysts used in the photocatalytic conversion method for treating carbon dioxide in the prior art cannot effectively capture carbon dioxide and the catalytic efficiency is low.

The invention provides a CN (at) PDI-CS metal-free photocatalyst with a biomass-based D-A structure as well as a preparation method and application of the CN (at) PDI-CS metal-free photocatalyst, and belongs to the technical field of photocatalytic materials and environmental remediation. The preparation method of the CN (at) PDI-CS metal-free photocatalyst comprises the following steps: (1) mixing PTCDA, CS and imidazole, and carrying out a reaction 1 under a protective atmosphere to obtain PDI-CS; and (2) mixing the PDI-CS, the g-C3N4 and imidazole, and carrying out a reaction 2 to obtain the CN (at) PDI-CS metal-free photocatalyst. According to the catalyst disclosed by the invention, the charge separation efficiency and the visible light absorption capacity are synergistically enhanced through a D-A structure and an electronic push-pull effect, and the recombination rate of photon-generated carriers is reduced, so that the CN (at) PDI-CS material has efficient photocatalytic degradation performance.

This invention relates to the field of photocatalyst technology, specifically to a Ni single-atom / phosphorus / g-C3N4 composite material, its preparation method, and its applications. The Ni single-atom / phosphorus / g-C3N4 composite material provided by this invention uses hollow tubular g-C3N4 as a matrix, simultaneously doped with phosphorus and Ni single atoms. Results show that simultaneous doping with phosphorus and Ni single atoms can effectively regulate the electronic configuration of g-C3N4, expand visible light absorption, and promote charge separation and transfer. The hydrogen production rate of the Ni single-atom / phosphorus / g-C3N4 composite material can reach 2707.7 μmol / h. ‑1 g ‑1 The concentrations were approximately 615.4 μmol / h of pure g-C3N4. ‑1 g ‑1 ), phosphorus-doped g-C3N4 composite material (1602.2 μmol h) ‑1 g ‑1 The apparent quantum efficiency of the composite material is 4.4, 1.7, and 1.5 times that of the Ni single-atom doped g-C3N4 composite material; it has an apparent quantum efficiency of 8.8% at 400 nm and exhibits excellent stability in 6 photocatalytic hydrogen production cycles.

The invention belongs to the technical field of photocatalytic materials, and particularly relates to application of a sulfur-vacancy-rich zinc cadmium sulfide solid solution catalyst in a catalytic system for synthesizing formamide by photocatalysis of methanol and ammonia under visible light. The sulfur-vacancy-rich zinc cadmium sulfide solid solution catalyst is applied to catalysis of methanol and ammonia under visible light to synthesize formamide for the first time; compared with the formamide photocatalyst in the prior art, the formamide photocatalyst provided by the invention is a non-noble metal catalyst with low price on one hand, realizes catalysis under visible light on the other hand, and overcomes the technical defect that the catalyst in the prior art can only perform catalysis under ultraviolet light on the other hand; systematic design is carried out from three dimensions: the spectral response range is broadened, visible light is used for photocatalysis, the charge separation efficiency is optimized, and the adsorption behavior and reaction activity of a free radical intermediate are accurately regulated and controlled, so that formation of a target C-N coupling path is promoted, and the technical defects of a formamide photocatalyst in the prior art are overcome.

This invention provides a carboxyl-functionalized g-C3N4-supported Cu-MOF catalyst, its preparation method, and its application, belonging to the field of photocatalytic materials technology. First, a carbon nitride precursor and a carboxylating agent are mixed in a solvent to undergo a carboxylation reaction, yielding carboxylated graphitic carbon nitride. Then, the carboxylated graphitic carbon nitride is mixed with a copper salt solution for a preliminary reaction, yielding copper-supported C3N4-C powder. Finally, the copper-supported C3N4-C powder and 1,3,5-pyromellitic acid are dispersed in a solvent for a hydrothermal reaction to obtain the carboxyl-functionalized g-C3N4-supported Cu-MOF catalyst. This invention, through directional assembly and growth, ultimately obtains a composite photocatalyst with tight interfacial bonding, stable structure, and high photogenerated charge separation efficiency.

The invention relates to an organic heterojunction-based light-temperature dual-response sensor element, which is prepared from a substrate, a source electrode, a drain electrode, a grid electrode, an organic active layer, a dielectric layer and a device encapsulation layer, and is characterized in that the organic active layer is composed of a Rho group and an imide group in a Rho diimide system organic small molecular structure; the compound has a long conjugated molecular structure, and charge transfer and energy level matching can be effectively promoted. The organic heterojunction structure has the advantages that the organic heterojunction structure has an interpenetrating network form, the donor-acceptor interface area is remarkably increased, so that the charge separation efficiency is enhanced, the carrier mobility is improved, the transconductance, the on-off ratio and the stability of a sensor element are improved, and the organic heterojunction structure has good solution processability and can be applied to the field of sensor devices. The method is suitable for large-area and low-cost flexible electronic manufacturing. The invention provides a new material system for light and temperature dual-response sensor elements, and has wide application prospects in the fields of wearable sensing, Internet of Things, environment monitoring and the like.

This invention provides a double-defect type Bi 12 O 17 This paper describes the preparation method and application of Bi2 ultrathin nanosheet photocatalysts, belonging to the field of photocatalytic materials technology. The preparation method is as follows: Bi2 is prepared by reacting a strong base with BiCl3 under ultrasonic assistance. 12 O 17 Cl2 ultrathin nanosheet precursor; then the precursor is mixed with sodium borohydride and a sulfur source and ground to obtain the target catalyst. In Bi 12 O 17 Sulfur doping and oxygen vacancies are simultaneously introduced into Cl2 ultrathin nanosheets to construct a doped-vacancy dual-defect system. By comprehensively utilizing the synergistic enhancement effect of the dual defects, the bottleneck of single-defect modification is overcome, thereby achieving a comprehensive improvement in photocatalytic performance (light capture, charge separation, surface reaction, and stability). This invention features a simple process, low requirements for preparation conditions, and is easily achievable for mass production, demonstrating high practical value and application prospects.

The invention provides a cesium lead bromide quantum dot / single-layer molybdenum disulfide 0D / 2D heterojunction photoelectric sensor and a preparation method thereof, and belongs to the technical field of photoelectric devices. Constructing a patterned bottom electrode by adopting an Au / p + type silicon substrate / SiO2 structure; preparing a single-layer molybdenum disulfide (MoS2) film by a mechanical stripping method, and transferring the single-layer molybdenum disulfide (MoS2) film to the patterned silicon wafer electrode; and spin-coating the single-layer molybdenum disulfide film with the quantum dot solution, drying and annealing to obtain the cesium lead bromide quantum dot / single-layer molybdenum disulfide 0D / 2D heterojunction photoelectric sensor. According to the invention, CsPbBr3 QDs with efficient light absorption and single-layer MoS2 with high carrier mobility are integrated together, and CsPbBr3 QDs are used as an effective light absorbent to enhance a local electric field around MoS2. And by utilizing the synergistic effect of the CsPbBr3 QDs and the single-layer MoS2, the separation rate of photon-generated carriers in the heterojunction is accelerated, and the light absorption capability of the MoS2 device is improved. The p + type silicon substrate is combined with the annealing process, a Br-rich passivation ultra-clean II type heterojunction interface is constructed, and the charge separation efficiency and the environmental stability are remarkably improved.

The invention relates to a metal organic framework for improving charge separation efficiency based on a conjugated benzene ring, a preparation method thereof and application of the metal organic framework in degradation of methyl orange. The invention relates to a complex of MOF-2 [Zn8 (NDC) 8 (TRZ) 8] n, in which NDC is 2, 6-naphthalenedicarboxylic acid, and TRZ is 1, 2, 4-triazole, and a preparation method of the complex of MOF-2 [Zn8 (NDC) 8 (TRZ) 8] n. The extended pi conjugation in MOF-2 results in significant improvements, including reduced band gap, enhanced visible light absorption, and more excellent charge separation efficiency, as proved by comprehensive ultraviolet-visible spectroscopic analysis, electrochemical analysis, and valence band-XPS measurements. 83.8% of methyl orange degradation is realized by the MOF-2 under the irradiation of visible light within 30 minutes. According to mechanism research performed by using a free radical capture technology and electron spin resonance (ESR) spectroscopy, superoxide free radicals (. O2 <->), singlet oxygen (1O2) and hydroxyl free radicals (. OH) are determined as main active species.

This invention discloses a hydrazone-linked fluorine-substituted covalent organic framework material, its preparation method, and its applications, belonging to the field of semiconductor photocatalysis technology. The material is synthesized by hydrazone condensation of 1,3,5-trifluoro-2,4,6-tris(4-formylphenyl)benzene and terephthalohydrazide, denoted as F-TPDH-COF. A one-step solvothermal synthesis is employed, resulting in a mild, environmentally friendly, low-cost, and easily scalable process. The material obtained by this invention utilizes hydrazone bonds to achieve proton enrichment in acidic media, and fluorine atoms regulate the electronic structure to improve charge separation efficiency. Under pH=2 conditions, the photocatalytic hydrogen peroxide production rate reaches as high as 5825.2 μmolg. ‑1 h ‑1 Its activity and stability are significantly better than most existing COF photocatalytic materials, and it can be used for efficient photocatalytic preparation of hydrogen peroxide in acidic systems, showing good prospects for industrialization.

The invention provides a preparation method of a defect engineering regulation ultrathin LDH confinement ruthenium monatomic catalyst and application of the defect engineering regulation ultrathin LDH confinement ruthenium monatomic catalyst to photocatalytic CO2 reduction, and relates to the technical field of catalyst preparation, the catalyst adopts ultrathin cobalt-aluminum layered double hydroxide (CoAl-LDH) rich in metal vacancies as a carrier, Ru monatomic is anchored at the metal vacancies through a wet impregnation process, and the catalyst is prepared through a hydrothermal method. Ru atoms and a surrounding matrix form an unsaturated coordination environment, so that adsorption and activation of CO2 are effectively enhanced; meanwhile, highly dispersed Ru active sites not only provide abundant catalytic centers, but also regulate and control the distribution of photo-generated charges on the surface of the catalyst, promote the separation and migration of charges, and significantly inhibit electron-hole recombination. Through the mode, the invention provides a construction strategy of a monatomic catalytic material, and a brand new technical path is provided for efficient CO2 photoreduction reaction.

The invention discloses an organic solar cell based on a dihalogen benzene additive, and a forward device of the organic solar cell comprises a transparent conductive substrate ITO, a hole transport layer, an organic active layer, an electron transport layer and a metal electrode which are sequentially stacked from bottom to top, the organic active layer comprises a polymer donor PM6, a non-fullerene electron acceptor L8-BO and a dihalogenated benzene additive TCBB. According to the organic solar cell based on the double-halogen benzene additive and the preparation method of the organic solar cell, the double-halogen benzene is introduced into the active layer of the organic solar cell as the active layer additive, and the aggregation state structure of the active layer film is optimized, so that the phase separation degree of a donor-acceptor material is improved, and the charge separation and transmission efficiency is improved. According to the organic solar cell prepared by adopting the technical scheme, the photoelectric conversion efficiency can reach 20.11%, the photoelectric conversion efficiency is obviously superior to that of a control group device with a DIO additive, and the device has good stability.

The invention relates to the technical field of electrocatalysis, in particular to an oxygen / sulfur heterostructure oxygen evolution electrocatalyst and a preparation method and application thereof. Based on an in-situ oxidation strategy, a CuFeO layer is generated on the surface of CuFeS, and the CuFeS-coated CuFeO high-performance oxygen evolution electrocatalyst with a heterostructure is obtained. By constructing a sulfide-oxide heterojunction, a built-in electric field can be formed at an interface to promote charge separation and transfer, so that the electrocatalytic activity is remarkably improved. And on the other hand, the CuFeO layer on the outer layer serves as an armor, and the problem of oxidation of the surface of CuFeS is solved. The electro-catalytic performance and the long-term stability are obviously improved.

A charge separating apparatus includes: a transporter configured to move charges in a supply direction; a door assembly configured to stop a front end of a unit of three charges at a predetermined position, the unit of three charges including a combination of a central charge, a front charge, and a rear charge; a gripper configured to grip each of the central charge, the front charge, and the rear charge; a separator configured to move the front charge in the supply direction and move the rear charge in a direction that is opposite to the supply direction; and a driver configured to supply driving power to the door assembly, the gripper, and the separator.

The present invention relates to a photocatalyst and a preparation method therefor. The photocatalyst according to the present invention comprises titanium dioxide with a bronze crystal phase and an anatase crystal phase so as to have high photoactivity, and thus is suitable for removing odors and toxic gases. In addition, the titanium dioxide included in the photocatalyst, according to the present invention, has a novel crystal phase having a charge separation effect superior to those of other crystal phases, and thus has improved photoactivity. Additionally, the photocatalyst of the present invention has high photoactivity, and thus is suitable for removing odors and toxic gases. In addition, the photocatalyst of the present invention has excellent durability against catalytic poisons formed on the surface of a catalyst during removal of VOCs and toxic gases (acetaldehyde, isovaleraldehyde, isovaleric acid and toluene).

This invention discloses a Yb-BiOI / Ce-MgAl-LDH composite photocatalyst, its preparation method, and its application, belonging to the field of environmental functional materials and photocatalysis technology. The purpose of this invention is to provide a Yb-BiOI / Ce-MgAl-LDH composite photocatalyst with high catalytic activity, good stability, and reusability, its preparation method, and its application in the efficient degradation of tetracycline antibiotics. This invention prepares a Yb-BiOI / Ce-MgAl-LDH heterojunction composite catalyst with a three-dimensional flower-like interwoven morphology via a hydrothermal method. Under visible light and H2O2 coexistence conditions, this catalyst not only promotes photogenerated carriers (e-carriers) through the built-in electric field at the heterojunction interface, but also… ‑ / h + Effective separation of Ce, while utilizing Ce 3+ / Ce 4+ Redox pairs with Yb 3+ Doping-induced active sites synergistically catalyze the decomposition of H2O2, continuously generating high concentrations of hydroxyl radicals (·OH); photogenerated electrons can accelerate the valence state cycle of rare earth ions, while Fenton-like reactions promote charge separation. The deep coupling of the two produces a significant synergistic enhancement effect, achieving rapid and deep degradation of antibiotics.