82results about How to "Reduce recombination rate" patented technology

The invention relates to a backside illuminated image sensor and a preparation method thereof, and electronic equipment, and relates to the technical field of integrated circuits, the backside illuminated image sensor comprises a substrate, and photodiodes and laminated target isolation structures which are located on a first surface of the substrate, are alternately arranged along a first direction parallel to the first surface, and extend towards the substrate; the substrate internally comprises a plurality of trench isolation structures which extend into the substrate through the first surface and are arranged at intervals in the first direction; the trench isolation structures and the laminated target isolation structures right above the trench isolation structures are arranged in a one-to-one manner; the laminated target isolation structure comprises isolation parts and insulation parts which are sequentially and alternately laminated along a second direction deviating from the substrate; the photodiode comprises at least two photosensitive layers which are sequentially stacked in the second direction, the longitudinal sections of the photosensitive layers are T-shaped, one photosensitive layer makes contact with the first surface of the substrate, substrate damage caused by ion implantation can be avoided, and meanwhile the photoelectric conversion efficiency and the quantum efficiency are improved.

The invention relates to a backside illuminated image sensor and a preparation method thereof, and an electronic device, and relates to the technical field of integrated circuits, and the method comprises the steps: providing a substrate which comprises an isolation layer and a plurality of first isolation structures which are arranged at intervals in a first direction parallel to the surface of the substrate; forming first isolation parts in the substrate, wherein the first isolation parts and the first isolation structures are arranged in a one-to-one manner and extend to the isolation layer through the back surface of the substrate; removing the substrate between the adjacent first isolation parts to obtain side wall semiconductor layers located on the side surfaces of the first isolation parts and first grooves between the adjacent side wall semiconductor layers; the size of the side wall semiconductor layer is gradually increased in the direction close to the isolation layer. And forming a bottom photosensitive layer in the first groove, and epitaxially growing a top photosensitive layer on the bottom photosensitive layer. And forming a second isolation part connected with the first isolation part in a gap between the adjacent top photosensitive layers, thereby improving the photoelectric conversion efficiency and the quantum efficiency.

The embodiment of the invention relates to the field of photovoltaic technology, and provides a solar cell and a preparation method thereof, so as to improve the photoelectric conversion efficiency of the solar cell comprising a fragmented cell, greatly reduce the mechanical damage of the fragmented cell, greatly reduce the hidden crack possibility of a photovoltaic module comprising the fragmented cell, and improve the production efficiency of the photovoltaic module. And the product yield is further improved. The preparation method of the solar cell comprises the following steps: providing a whole solar cell; a first laser device is adopted to form positioning grooves in the two ends of the to-be-segmented area respectively; a second laser device is adopted to heat the to-be-segmented area from the positioning groove until the other positioning groove is finished; spraying cooling liquid to the heated to-be-segmented area by adopting a spraying device, so that the whole solar cell is cracked in the to-be-segmented area along the first direction to form at least two segmented cells; the cooling liquid comprises oxidizing substances, and the cross section is a surface hydroxylated silicon surface; and forming a passivation layer on the fracture surface.

The embodiment of the invention relates to the photovoltaic field, and provides a solar cell and a preparation method thereof, and a photovoltaic module, the solar cell comprises a substrate having a first surface and a second surface opposite to each other, and the first surface comprises first regions and second regions which are alternately arranged; the first passivation structure is located on the first region and comprises a first passivation layer and a first semiconductor doping layer which are stacked; the second passivation structure is at least located on the second region and comprises a second passivation layer and a second semiconductor doping layer which are stacked; the first surface further comprises a junction region, the junction region comprises a part of at least one of the first region and the second region, the side wall of the first semiconductor doping layer and the side wall of the second semiconductor doping layer are in contact on the junction region, and the junction region is provided with a crystallization doping part; the crystallized doped portion is a portion of at least one of the first semiconductor doped layer and the second semiconductor doped layer. The embodiment of the invention is at least beneficial to improving the hot spot effect of the battery assembly formed based on the solar battery.

The embodiment of the invention relates to the photovoltaic field, and provides a solar cell and a preparation method thereof, and a photovoltaic module, and the solar cell comprises fragmented cells which are formed by segmenting the same whole solar cell along a first direction, and the whole solar cell is provided with a front surface and a back surface which are oppositely arranged along a second direction, each fragmented battery is provided with a sub-front surface and a sub-back surface which are oppositely arranged along a second direction, the sub-front surfaces of at least two fragmented batteries formed based on the same whole solar battery are partial areas of the front surfaces, and the sub-back surfaces of at least two fragmented batteries formed based on the same whole solar battery are partial areas of the back surfaces; wherein the fragmented battery is provided with a cross section formed through segmentation treatment, two included angles which are complementary angles are formed between the cross section and the plane where the sub back surfaces are located, and one included angle is an acute angle; and the passivation layer is at least located on the fracture surface. The embodiment of the invention is at least beneficial to improving the photoelectric conversion efficiency of the solar cell comprising the fragmented cell.

The invention relates to the technical field of porous adsorption materials, and discloses a porous adsorption material for organic waste gas purification and a preparation method thereof. Comprising the following steps: ultrasonically dispersing modified titanium carbide MXeneC in ethylene glycol, adding a palladium acetate solution, uniformly stirring, heating to 150-155 DEG C, reacting for 2-2.5 hours, cooling to room temperature, filtering, washing with deionized water and ethanol, and performing vacuum drying at 70 DEG C for 12 hours to obtain the porous adsorption material.

The invention discloses a sulfur-rich vacancy ZnIn2S4 at FeNi < 0.48 > S < 1.71 > heterojunction photocatalyst as well as a preparation method and application thereof, and the photocatalyst is a sulfur-rich vacancy ZnIn2S4 at FeNi < 0.48 > S < 1.71 > heterojunction composite material with a hollow structure, which is formed by in-situ growth of a sulfur-vacancy-containing ZnIn2S4 nanosheet on the surface of a FeNi < 0.48 > S < 1.71 > hollow nanosphere. The photocatalyst provided by the invention has a larger specific surface area and a wider light absorption range, and the internal sulfur vacancy as an electron capture center can inhibit the compounding of photo-induced electron-hole pairs. The three-dimensional core-shell hollow sphere structure can reduce the recombination rate of charges, improve the mobility of electrons, show better photocatalytic performance, and have great application prospects in the fields of energy and environment.

The embodiment of the invention relates to the photovoltaic field, and provides a photovoltaic cell and a preparation method thereof, and a photovoltaic module, and the preparation method comprises the steps: providing a substrate comprising a first surface and a second surface; forming a hydrophobic layer covering the second surface; forming an aluminum oxide lamination layer on the first surface by adopting at least two atomic layer deposition process steps; the step of forming the aluminum oxide lamination comprises the following steps: placing a substrate covered with a hydrophobic layer in a reaction chamber, and introducing water vapor and trimethylaluminum into the reaction chamber in any circular deposition step, preset process parameters of any circulation deposition step in the (N + 1) th atomic layer deposition process are controlled to be lower than preset process parameters of any circulation deposition step in the Nth atomic layer deposition process, and the preset process parameters comprise at least one of water vapor flow, trimethylaluminum flow, water vapor introduction duration and trimethylaluminum introduction duration. The embodiment of the invention is at least beneficial to avoiding back surface winding plating and improving the film layer quality of the aluminum oxide laminated layer.

The invention discloses a preparation method of graphene cloud wool, and relates to the technical field of cloud wool. The preparation method comprises the following steps: carrying out an addition reaction on p-aminostyrene and graphite scale to introduce double bonds, then mixing with gamma-methacryloxypropyltrimethoxysilane to prepare hydrogel and form a dual cross-linked network, and then preparing aerogel to improve the strength of cloud wool; titanium dioxide nanocrystals are attached to aerogel, then dehydration and crystal form transformation are carried out after a hydrothermal reaction, the porosity is enhanced, the photocatalytic activity is improved, the concentration of active oxygen is increased, and the antibacterial performance is further improved. Secondly, polyester hollow special-shaped spinning is adopted in the cloud velvet to form a penetrating porous structure, more still air can be enriched, and the warm keeping effect is improved; in the fiber forming process, an all-dimensional annular high-speed strong cold air blowing technology is adopted, a spinning melt is instantly and rapidly cooled with a very small error, and the bulk density of cloud wool is very small. The cloud velvet prepared by the invention has the effects of high strength, antibiosis and warm keeping.

The invention discloses a synthesis method and application of a Bi2SiO5 / g-C3N5 composite material, a sodium silicate solution is added into a bismuth salt solution, pH is adjusted to be alkaline, a hydrothermal reaction is performed, and after the hydrothermal reaction, filtering, washing, drying and stoving are performed to obtain Bi2SiO5; the preparation method comprises the following steps: carrying out thermal decomposition on 3-amino-1, 2, 4-triazole to prepare g-C3N5; the preparation method comprises the following steps: mixing Bi2SiO5, hexadecyl trimethyl ammonium bromide (CTAB), ethylene glycol and g-C3N5 to obtain a mixed solution, adding Bi2SiO5 into the mixed solution, uniformly stirring, and carrying out a hydrothermal reaction to obtain the Bi2SiO5 / g-C3N5 composite material catalyst. Bi2SiO5-g-C3N5 is prepared by using a hydrothermal method, an organic pollutant solution is degraded under light irradiation, and the degradation capability of the Bi2SiO5-g-C3N5 is tested. Results prove that the active sites, the absorption spectrum, the specific surface area and the catalytic ability of the composite material are all improved under the combined action of holes and heterojunctions.

The invention discloses a preparation method of a crystalline silicon solar cell. The preparation method comprises the following steps: arranging a function adjusting layer on and / or in a passivation dielectric layer; electrode slurry is printed on the passivation dielectric layer and corresponds to the position of the function adjusting layer; sintering to form a metal electrode; the function adjusting layer comprises at least one of compounds containing specific cations, the compounds containing the specific cations can release the specific cations at the sintering temperature, and the specific cations are cations corresponding to elements involved in the glass network formation. According to the preparation method, minority carrier recombination can be effectively reduced, the passivation effect of the battery is improved, and the conductivity of the metal electrode is effectively improved.

The invention provides an oxygen-vacancy-rich Bi5O7I microsphere piezoelectric-photocatalyst and a preparation method thereof, and belongs to the technical field of light pressure concerted catalysis, and the preparation method comprises the following steps: mixing Bi (NO3) 35H2O and PEG 6000 powder, dissolving in absolute ethyl alcohol, uniformly stirring, dropwise adding a NaI solution, uniformly stirring again, sequentially washing and drying to obtain a dried product, and calcining the dried product to obtain the oxygen-vacancy-rich Bi5O7I microsphere piezoelectric-photocatalyst. The Bi5O7I microsphere piezoelectric-photocatalyst rich in oxygen vacancy is obtained; according to the invention, richer oxygen vacancies are introduced into the Bi5O7I powder, the spectral absorption range of the piezoelectric-photocatalyst is expanded, and the concentration of current carriers is improved by utilizing the capturing effect of the oxygen vacancies on electrons, so that the photocatalytic, piezoelectric catalytic and light-pressure synergistic catalytic efficiency of the piezoelectric-photocatalyst is improved; the oxygen-vacancy-enriched Bi5O7I microsphere piezoelectric-photocatalyst prepared by the preparation method disclosed by the invention has efficient organic dye degradation performance, and the catalytic effect of the oxygen-vacancy-enriched Bi5O7I microsphere piezoelectric-photocatalyst is far superior to that of pure-phase Bi5O7I powder.

The invention relates to a back contact cell, a preparation method of the back contact cell and a photovoltaic module. The substrate has a first surface including first regions and second regions arranged alternately. The tunneling layer is arranged in the first region, and the first doped semiconductor layer is arranged on the side, away from the substrate, of the tunneling layer. The doped field region is located in the first region, and the doped field region and the first doped semiconductor layer are both provided with first doped elements. The second region is provided with a groove which is recessed relative to the first region, one part of the amorphous layer is arranged on the second region, and the other part of the amorphous layer is arranged on the side, away from the substrate, of the first doped semiconductor layer. The second doped semiconductor layer is arranged on one side, far away from the substrate, of the amorphous layer and is provided with a second doped element which is different from the first doped element in doping type. The depth of the doped field region is smaller than that of the groove. Therefore, the passivation performance of the first region can be improved, the passivation performance of the second region can also be considered, and the passivation performance of the back contact battery can be improved on the whole.

The invention discloses a BiOBr-TiO2-Bi2WO6 composite catalytic material as well as a preparation method and application thereof, and belongs to the technical field of catalysts. The method comprises the following steps: taking acetic acid and ultrapure water as solvents, adding cetyl trimethyl ammonium bromide, TiO2, a sodium source and a bismuth source, preparing a TiO2-Bi2WO6 composite catalyst by a hydrothermal method, and then taking TiO2-Bi2WO6 as a substrate, taking ultrapure water as a solvent, taking the sodium source, the bismuth source and a bromine source as raw materials, and preparing a BiOBr-TiO2-Bi2WO6 composite catalytic material by a hydrothermal method. When the catalyst is applied to preparation of benzaldehyde through photocatalytic selective oxidation of toluene, the recombination rate of photo-generated holes and electrons is effectively reduced, and the photocatalytic performance of a BiOBr-TiO2-Bi2WO6 composite material is improved.

The invention discloses a preparation method and application of a biochar composite ferroferric oxide photocatalyst, and relates to the technical field of photocatalyst preparation, and the preparation method specifically comprises the following steps: S1, preparing biochar; and S2, preparing the biochar composite ferroferric oxide photocatalyst. The photocatalyst disclosed by the invention is stable in performance, good in tetracycline degradation effect, high in light source utilization rate, low in raw material price, free of pollution, short in preparation time and low in energy consumption, and has a good application prospect in the fields of solving environmental pollution and energy crisis and photocatalysis application.

The invention discloses a processing technology matched with diffusion of a monocrystalline silicon battery piece for high sheet resistance and efficiency improvement, and the processing technology comprises the following operation steps: placing a silicon wafer to be diffused in a diffusion furnace, heating to 780 DEG C, introducing N2 with a large size of 3000 sccm and N2 with a small size of 1000 sccm at the same time, and carrying out the low pressure pumping through a closed pipe; after the temperature is stable, the temperature of each temperature zone in the furnace is raised to 820 DEG C, meanwhile, large N2 of 2000 sccm and small N2 of 600 sccm are introduced, and the time is 300 s. According to the processing technology for improving the diffusion efficiency of the high sheet resistance matched with the monocrystalline silicon battery piece, the conversion efficiency of the battery can be effectively improved through high resistance, the impurity recombination center of the surface can be effectively reduced through the design of the high sheet resistance and the low surface shallow junction, the survival rate of surface minority carriers is improved, meanwhile, the response of short waves is increased, and therefore Isc and Uoc are effectively increased, and the diffusion efficiency of the monocrystalline silicon battery piece is improved. By matching LECO with the sintering temperature, the FF can be effectively improved while the Uoc and Isc are improved, and the purpose of improving the efficiency by 0.03% is achieved.

The invention discloses an II-type heterojunction BiOBr / NiV-LDH composite photocatalytic material as well as a preparation method and application thereof. The preparation method comprises the following steps: preparing NiV-LDH powder by adopting a hydrothermal method; the BiOBr / NiV-LDH composite photocatalytic material is further prepared by adopting a sol-gel method; the micro-morphology of the BiOBr / NiV-LDH composite photocatalyst is accurately regulated and controlled to be of an II-type heterojunction nanosheet structure by regulating and controlling key process parameters such as the reaction temperature and the reaction time of a sol-gel method; according to the structure, the specific surface area of the material is greatly increased, and then rich active sites are provided for photocatalytic reaction; in the prepared BiOBr / NiV-LDH composite photocatalytic material, an II-type heterojunction structure formed by BiOBr and NiV-LDH can obviously reduce the recombination rate of photo-induced electron-hole pairs, and the visible light response range of the material is effectively widened; meanwhile, NiV-LDH has excellent photo-generated hole capturing capability, can be used as a cocatalyst for surface oxidation reaction, and synergistically improves the photocatalytic performance, so that the composite material finally shows excellent catalytic activity and stability in the field of pollutant degradation.

The invention discloses preparation and application of a Pd nano particle modified hydrogen production photocatalytic material, and relates to the field of catalysts.A UiO-66-NH2 material is prepared through a hydrothermal method, then a semiconductor material dicerium trisulfide is loaded on the surface of UiO-66-NH2 through a precipitation method, oxygen vacancy defects are introduced on the surface of a Ce2S3 / UiO-66-NH2 heterostructure through a chemical reduction method, and the Pd nano particle modified hydrogen production photocatalytic material is obtained. The Pd nanoparticles are used as a photo-induced electron capture center, and are induced and anchored on the surface of the material in combination with a photodeposition method, so that the high-dispersity Pd nanoparticle modified hydrogen production photocatalytic material is finally prepared. Introduction of oxygen vacancies in the composite material and the surface plasma resonance effect of Pd nanoparticles can effectively improve the light absorption capacity, a built-in electric field formed in a heterostructure of the composite material can drive photo-generated charges to move directionally and reduce the recombination rate of the photo-generated charges, and the photocatalytic hydrogen production efficiency of the composite material can be enhanced through the synergistic effect of the two.

The invention relates to a two-dimensional metal material for an ultraviolet photoelectric detector and a preparation method of the two-dimensional metal material, and belongs to the technical field of detector preparation, a sapphire substrate is activated through high-activity particles through plasma treatment, hydroxyl active sites are introduced, a clean interface foundation is laid for heteroepitaxial growth of an ultra-wide forbidden band Ga2O3 film, and the performance of the detector is improved. The method comprises the following steps: performing chemical vapor deposition on Ga2O3 to ensure the specific absorption capacity of Ga2O3 to ultraviolet light, annealing in a mixed atmosphere after chemical vapor deposition, repairing the oxygen vacancy defect of a Ga2O3 film by using the high activity of ozone, improving the crystallization quality, effectively reducing dark current noise, and performing in-situ growth of a WSe2 layer in a high vacuum environment through a pulse laser deposition technology to form a van der Waals heterojunction without lattice mismatch. And an efficient carrier separation channel can be constructed by virtue of energy level matching of WSe2 and Ga2O3, so that the problem that ultraviolet absorption and carrier transmission are difficult to consider by virtue of a single material is solved, and the light response capability of the device is remarkably enhanced.

This application relates to the field of solar cell technology, and more particularly to a solar cell, a tandem cell, and a photovoltaic module. The first textured structure of the metallized region includes a raised structure, which includes at least a platform structure. The platform structure includes a side surface and a top platform with micro-pyramids. Both the side surface and the micro-pyramids reflect incident light, which is beneficial to improving the absorption capacity of long-wavelength light. Furthermore, the combination of the side surface and the micro-pyramids helps to reduce the number of relatively large sharp peaks, reduces surface defects, and facilitates the deposition of a passivation layer, thereby reducing the recombination probability of charge carriers and improving the photoelectric conversion efficiency of the solar cell. At the same time, the top platform with micro-pyramids can also allow the electrode paste to fully fill the gaps, increasing the contact area between the electrode and the substrate, which helps to reduce the contact resistance and improve the charge carrier collection efficiency, thereby improving the photoelectric conversion efficiency.

The application discloses a MOF photocatalyst with a bimetallic UiO-66-NH2 as a carrier loaded with Pt, and the photocatalyst is prepared by a solvothermal method, a modification carrier of UiO-66-NH2 (Zr:Ce=2:1), and a sodium borohydride reduction method for loading Pt. The obtained Pt@UiO-66-NH2 (Zr:Ce=2:1) photocatalyst has a high degradation rate, a high mineralization rate and high stability in a photocatalytic degradation process of toluene, and the preparation method is simple and easy to implement, so that the photocatalyst has a good application prospect in a terminal treatment process of photocatalytic VOCs oxidative degradation.

In the present invention, at least one surface of the cell body of the photovoltaic cell includes a first area and a second area, the first area is set as a velvet structure, and the velvet structure composed of pyramid and / or inverted pyramid structures can reduce the probability of small-angle incident light being reflected out of the photovoltaic cell; the second area is set as a plurality of pits with a projection size of 0.5 to 100 microns on the surface of the cell body, and a plurality of micron-sized pits can reduce the probability of large-angle incident light being reflected out of the photovoltaic cell. Large-angle incident light is reflected multiple times in the micron-sized pits, which can improve the photovoltaic cell's absorption effect on incident light. At the same time, compared with the nano-scale light trapping structure, the micron-sized pits have a larger structural size, and the photovoltaic cell with micron-sized pits has a smaller surface area. Therefore, a uniform passivation layer can be effectively generated on the surface of the photovoltaic cell, while reducing the recombination rate of non-equilibrium carriers on the surface of the photovoltaic cell, thereby improving the photoelectric conversion efficiency of the photovoltaic cell.

This invention relates to a method for preparing double perovskite La2CoFeO6 and its application in degrading odorous pollutants, comprising the following steps: dissolving La(NO3)3·6H2O, Co(NO3)2·6H2O, and Fe(NO3)3·9H2O in a mixed solution of deionized water and ethylene glycol or deionized water and citric acid, adjusting the pH, and then mixing thoroughly; placing them separately in a high-pressure reactor and heating or evaporating the moisture and drying in an oven to obtain precursor powder or dry gel; then calcining at high temperature and cooling to obtain double perovskite La2CoFeO6 powder. The R3c phase La2CoFeO6 material provided in this application, by combining crystal structure regulation with oxygen vacancy defect engineering, establishes a synergistic enhancement mechanism of "structure optimization + defect regulation" for double perovskite materials, significantly improving the photoresponse capability and catalytic performance of the material, providing a new technical path and material design idea for the design of subsequent high-performance photocatalysts for odor pollution control.

The invention provides a method for preparing high-crystallinity modified carbon nitride at low temperature, and belongs to the technical field of photocatalytic materials.The method comprises the steps that urea, solar salt and phosphonyl chloride tripolymer are mixed and then ground, and a mixture is obtained; calcining the mixture at the temperature of 300 to 400 DEG C to obtain a calcined product; performing washing and vacuum drying on the calcined product to obtain high-crystallinity modified carbon nitride; wherein in the mixture, the mass ratio of the urea to the solar salt to the phosphonyl chloride tripolymer is 20: 4: 1. The modified carbon nitride prepared by the method has the advantages of wide spectral response and high carrier separation efficiency, so that the modified carbon nitride has excellent photocatalytic performance, the synthesis temperature of the modified carbon nitride in the method is relatively low, and the modified carbon nitride has the advantages of low energy consumption and low cost. The invention also provides high-crystallinity modified carbon nitride and application thereof.

The invention discloses a self-cleaning photovoltaic glass and a preparation method thereof, and relates to the field of photovoltaic glass. When preparing the self-cleaning photovoltaic glass, the invention comprises the following steps: acid-catalyzing and aging ethyl orthosilicate to obtain an acid-catalyzed silica sol, and alkali-catalyzing and aging polyacrylic acid as a template to obtain a hollow silica sol; the acid-catalyzed silica sol and the hollow silica sol are mixed and aged to obtain a composite silica sol; tetrabutyl titanate, urea, and lanthanum nitrate are polycondensed to obtain a nitrogen-lanthanum-doped titanium dioxide sol; the composite silica sol and the nitrogen-lanthanum-doped titanium dioxide sol are modified by a silane coupling agent to obtain a composite sol; the photovoltaic glass is impregnated and pulled with the composite silica sol and the composite sol, respectively, and dried, and finally annealed to obtain the self-cleaning photovoltaic glass. The self-cleaning photovoltaic glass prepared by the invention has excellent wear resistance, anti-reflection performance, and self-cleaning performance.

The invention discloses a titanium dioxide-graphene oxide composite material and a preparation method and application thereof, and belongs to the technical field of composite materials, the titanium dioxide-graphene oxide composite material comprises a graphene oxide matrix and titanium dioxide particles loaded on the graphene oxide matrix; in the composite material, the mass percentage of the graphene oxide is 1-25 wt%. According to the invention, electron-hole pair compounding is effectively inhibited, and the photocatalytic performance of the composite material is improved.

The present invention relates to a modified bismuth oxychloride photocatalyst and a preparation method thereof, and belongs to the technical field of photocatalytic materials. The photocatalyst is prepared by a solvothermal reaction using bismuth salt, gadolinium salt and chloride salt as raw materials, polyvinyl pyrrolidone as a structural modifier, and ethylene glycol as a soft template and solvent at the same time; wherein the molar ratio of gadolinium salt to bismuth salt is 4:(0.3-0.4); the molar ratio of chloride salt to bismuth salt is greater than 1:1; the volume ratio of saturated chloride solution to ethylene glycol is (8-12):(40-60); the feed ratio of polyvinyl pyrrolidine to ethylene glycol is (0.8-1.2) g:(40-60) mL; the photocatalyst is a micron-scale flower-like structure composed of multilayer nanosheets, which can reflect and refract visible light multiple times, thereby improving the utilization efficiency of visible light, having a high specific surface area and a large number of active sites, and can efficiently photocatalytically degrade organic pollutants in wastewater under visible light.

The utility model provides a spray header assembly and plasma processing equipment. The spray header assembly comprises: a gas guide plate in which a first gas channel and two or more second gas channels are formed, the plurality of second gas channels being arranged around the first gas channel; the spraying plate is located below the gas guide plate and mechanically connected with the gas guide plate, and a gas uniformizing cavity is formed between the gas guide plate and the spraying plate; the first gas inlet pipe is communicated with the first gas channel and a reaction gas source; and two or more second gas inlet pipes, wherein each second gas inlet pipe is communicated with one second gas channel and a remote plasma source. The middle part and the edge of the reaction cavity can be fully cleaned, the cleaning efficiency is improved, and the cost is reduced.

The invention discloses a carbon nitride-based lotus leaf bionic structure photocatalytic material and a preparation method and application thereof in antibiosis, and belongs to the technical field of antibacterial materials.The preparation method comprises the following steps that after melamine, urea and a modifier are mixed and ground evenly, calcination, washing and drying are conducted, and graphite-phase carbon nitride is prepared; the preparation method comprises the following steps: dispersing graphite-phase carbon nitride in deionized water, adding an iron source, an oxidant and a regulator, uniformly mixing, and carrying out hydrothermal reaction, washing and drying to obtain the carbon nitride-based lotus leaf bionic structure photocatalytic material. Inspired by a lotus leaf surface structure in nature, two materials of graphite-phase carbon nitride and hematite are designed into a lotus leaf bionic structure, so that the light absorption range is wider, and the recombination rate of photo-induced electrons and holes is lower. The adsorption capacity of the composite material to water molecules and oxygen is enhanced, generation of active oxygen species through photocatalysis is facilitated, and a good antibacterial effect is achieved. Reaction conditions are mild, the preparation principle is simple, operation is easy, and industrial production is facilitated.

The invention relates to a CdS (at) MoS2 photocatalyst and a preparation method and application thereof in biomass reforming hydrogen production, the CdS (at) MoS2 photocatalyst is prepared by the following steps: firstly, dispersing prefabricated CdS powder in deionized water, stirring for 1-2 hours by a magnetic stirrer, then adding MoS2 which is dispersed in the deionized water and is subjected to ultrasonic treatment for 1-2 hours, the mass ratio of the MoS2 to the CdS is 0.02: 1-0.1: 1, stirring for 1-2 hours by a magnetic stirrer, then adding the MoS2 into the deionized water, stirring for 1-2 hours by the magnetic stirrer, and finally adding the MoS2 into the deionized water to obtain the CdS (at) MoS2 photocatalyst. And continuously stirring for 24 hours at normal temperature by using the magnetic stirrer, and finally centrifuging and drying the mixed solution to obtain the CdS-coated MoS2 photocatalyst. Compared with the prior art, the device has the advantages that an electric field is built in, the charge separation efficiency can be improved, and the device has a good effect on hydrogen production through photocatalytic biomass reforming, especially hydrogen production through cane sugar.