365 results about "Light response" patented technology

The invention relates to the technical field of biological materials, in particular to a pillararene-based photoresponse MOF-based ion gating nanochannel and a preparation method thereof. According to the pillararene-based photoresponse MOF-based ion gating nano-channel, a bullet-shaped nano-channel is prepared by taking PET (Polyethylene Terephthalate) as a substrate, and the substrate can provide structural support; p5A-MOF-1 based on pillararene is used as a core functional layer, and the core functional layer can provide a stable cavity environment; a P5A-MOF-1 cavity is filled with an organic aromatic azo compound, so that the light response structure change is realized. And the effective volume of the P5A-MOF-1 cavity is regulated and controlled through the photoisomerization effect of the azo group, so that precise gating of ion transmission is achieved. The preparation method provided by the invention is simple and convenient to operate, mild and controllable in condition and beneficial to large-scale production.

The invention discloses a preparation method of a high-stability photoresponse covalent organic framework membrane and application of the high-stability photoresponse covalent organic framework membrane in selective separation of multiple components. 4-azido azobenzene is prepared by carrying out azido reaction on 4-aminoazobenzene in an acidic aqueous solution, and then a BPTA-TAPB-COF membrane is used as a matrix to prepare the high-stability photoresponse covalent organic framework membrane. 4-azido azobenzene is efficiently grafted to the pore wall of the BPTA-TAPB-COF membrane through a click chemical reaction, the photoresponse covalent organic framework membrane is constructed, and the covalent organic framework membrane can be used for multi-component selective separation and is suitable for multi-component systems with different sizes. The azobenzene group in the pore channel of the prepared Azo-COF membrane is subjected to reversible cis-trans isomerization under the irradiation of ultraviolet / visible light, the response speed is high, and the cycle performance is good; the Azo-COF membrane has good application in the light-operated nanofiltration process, the performance of the Azo-COF membrane is not reduced after the Azo-COF membrane is continuously recycled for 12 days, and the structure of the Azo-COF membrane is kept stable.

The invention belongs to the technical field of two-dimensional material photoelectric devices, and particularly relates to a self-driven polarization sensitive photoelectric detector based on a Ta2NiSe5 / ReSe2 I-type heterojunction and a preparation method and application thereof. The self-driven polarization sensitive photoelectric detector comprises a Si / SiO2 substrate, a Ta2NiSe5 layer and a ReSe2 layer which are sequentially arranged from bottom to top, and the ReSe2 layer and the Ta2NiSe5 layer form a Van der Waals heterojunction with an I-type energy band. According to the self-driven polarization sensitive photoelectric detector, a cooperative mechanism is formed through directional transmission and use of a built-in electric field and a carrier limiting effect, photon-generated carriers are effectively limited in the ReSe2 layer, non-radiative recombination of the carriers at an interface is greatly reduced, and the key performance index, namely the photoresponse speed, of a device is further improved. In addition, the in-plane anisotropy of ReSe2 endows the device with sensitive response capability to the light polarization state.

The invention discloses a 4-BrPA / beta-CD supramolecular photosensitizer as well as a preparation method and application thereof, and belongs to the field of biomedical materials. According to the method, beta-cyclodextrin is used as a subject, 4-bromophthalic anhydride is used as an object, and the water-soluble photosensitizer is constructed through a chemically modified supramolecular assembly strategy. The preparation method comprises the following specific steps: reacting beta-cyclodextrin with paratoluensulfonyl chloride to obtain mono-(6-O-paratoluensulfonyl)-beta-cyclodextrin; then carrying out a reaction with ethidene diamine to obtain mono-(6-ethidene diamine-6-deoxy)-beta-cyclodextrin; then reacting with 4-bromophthalic anhydride in N, N-dimethylformamide, and precipitating and purifying through ethyl acetate to obtain a crude product; and finally, carrying out ultrasonic treatment, centrifugal separation and freeze drying to obtain a pure product. The prepared 4-BrPA / beta-CD supramolecular photosensitizer is excellent in water solubility, has at least 7 excitation centers in a visible light region of 400-520 nm, correspondingly generates at least 7 emission centers in a range of 500-780 nm, has a maximum excitation wavelength of about 460 + / -10 nm and a maximum emission wavelength of about 620 + / -10 nm, has an extremely wide visible light response characteristic, and can be used for antibacterial photodynamic therapy.

The application discloses an oxide-sulfide S-type heterojunction composite photocatalyst as well as a preparation method and application thereof. x The oxide-sulfide S-type heterojunction composite photocatalyst is prepared by adding WO x into ethanol, uniformly ultrasonic dispersing, and then performing heating and dry distillation. The application successfully constructs a tungsten oxide and cadmium sulfide heterojunction, has good light response, utilizes a heterojunction interface formed by the two catalysts and having a synergistic effect, improves the photocatalytic hydrogen production capacity, and promotes selective oxidation of benzyl alcohol. The application has simple operation and good repeatability.

This invention discloses an atmospheric oxidizing indicator detection device, relating to the field of atmospheric detection technology. The proposed solution includes a housing, and further comprises: a condenser tube installed within the housing for dehumidifying incoming air; a splitter, the inlet of which is connected to the outlet of the condenser tube, for splitting the dehumidified air sample into a first branch and a second branch; a photodetector unit, comprising a photoreaction tube, a first mixing tank, and a first detector connected in sequence, the inlet of the photoreaction tube being connected to the outlet of the first branch of the splitter; and a catalytic detection unit, comprising a catalytic reaction tube, a second mixing tank, and a second detector connected in sequence, the inlet of the catalytic reaction tube being connected to the outlet of the second branch of the splitter. This overcomes the inherent time difference problem of sequential measurements using a single detector.

The invention provides a dual-responsiveness eutectic solvent as well as a preparation method and application thereof. The dual-responsiveness deep-eutectic solvent comprises hydrogen bond donors and hydrogen bond acceptors, wherein the hydrogen bond donors comprise a first hydrogen bond donor and a second hydrogen bond donor; the first hydrogen bond donor comprises a polyalcohol compound containing a light response group, and the second hydrogen bond donor comprises a temperature-sensitive compound. The dual-responsiveness deep-eutectic solvent provided by the invention realizes one-step high-selectivity leaching and separation of various valuable metals from the positive electrode active material of the waste lithium ion battery, so that transition metal elements are separated out in a precipitation form, the lithium element is leached in the solution, and the subsequent extra complicated separation process is avoided.

The present invention relates to an antifungal composition comprising a Senna tora sprout extract or a fraction thereof as an active ingredient, wherein the Senna tora sprout extract or a fraction thereof or a compound isolated therefrom exhibits a photoreaction under light conditions of a wavelength of 400-528 nm. The antifungal composition of the present invention has a synergistic effect on antifungal activity upon irradiation with light having a wavelength of 400-528 nm.

This invention belongs to the field of functional polymer composite materials technology, and more specifically relates to a titanium oxide cluster composite fiber membrane with broad-spectrum photoresponse, its preparation method, and its applications. The preparation method includes: using 3-fluorocatechol and titanate as reactants, a solvothermal reaction is carried out under an inert atmosphere to obtain trifluorocatechol-modified titanium oxide cluster crystals; then, these crystals are dissolved with thermoplastic polyurethane particles in an organic solvent to prepare a composite spinning solution, which is then electrospun and dried to obtain the composite fiber membrane. In this fiber membrane, the titanium oxide clusters are uniformly dispersed at the nanoscale, forming a three-dimensional porous network structure with a diameter of 100-1000 nm, exhibiting broad-spectrum strong absorption (300-1000 nm), superhydrophobicity, and excellent photothermal properties. This invention effectively solves the problem of inorganic nanoclusters agglomeration in organic matrices through surface modification, achieving synergistic antibacterial effects through photothermal and photocatalytic processes, and has broad application prospects in medical protection, intelligent thermal management textiles, and environmental purification.

To provide an electrophotographic photoreceptor, process cartridge, and image forming apparatus that offer excellent wear resistance and can suppress image blurring. [Solution] The electrophotographic photoreceptor comprises a conductive substrate, a photosensitive layer, and a protective layer. The photosensitive layer is provided on the conductive substrate. The protective layer is provided on the photosensitive layer. The protective layer has a substrate made of a graft polymer having the composition of a UV (ultraviolet) curable polyfunctional monomer, a photopolymerization initiator, and a photoreactive group-containing substance, n-type conductive fine particles dispersed in the substrate, and metal oxide fine particles dispersed in the substrate, and has a Martens hardness of 400 N / mm². 2 The above and the volume resistivity is 1.0 × 10⁻⁶ 10 It is greater than or equal to Ω·cm.

The invention relates to the technical field of light atmosphere, and discloses a light atmosphere effect generation method, which comprises the following steps: generating an initial wave function according to an intensity field, deducing on the basis of a potential energy field to obtain a first wave function, performing intensity calculation and phase extraction from the first wave function to obtain a second wave function, updating the direction field based on the second wave function to obtain an updated direction field and an enhanced optical flow field; three core advantages of light atmosphere generation are realized, firstly, deep coupling of quantum optics and neurocognition is realized, real response of human eyes is simulated through a phase-sensitive light response model, and light atmosphere distribution is enabled to conform to quantum propagation rules and human visual cognition characteristics in combination with a cognition attention focusing mechanism of a DQN model; and 2, a dynamic self-adaptive mechanism runs through the whole process, and a light current coefficient and object motion data are adjusted in real time through the pupil diameter to feed back a new light flow field so as to ensure that the environment change can be quickly responded.

The invention relates to the technical field of semiconductor photoelectric devices, and discloses a GeSe / Si heterojunction photoelectric device and a preparation method thereof, the GeSe / Si heterojunction photoelectric device comprises a bottom electrode, an n-type silicon substrate, a GeSe layer and a top electrode; wherein the n-type silicon substrate and the GeSe layer form a Van der Waals heterojunction, the whole GeSe / Si heterojunction photoelectric device is of a sandwich structure, the bottom electrode is in contact connection with the n-type silicon substrate, and the top electrode is in contact connection with the GeSe layer. The GeSe / Si Van der Waals heterojunction-based high-performance photoelectric device with a sandwich structure and an II-type energy band structure is designed and prepared, due to the light transmission of the Au / ITO top electrode, GeSe with a high light absorption coefficient is used as a light absorption layer, a large number of photon-generated carriers can be generated, and the photoelectric device can be applied to the field of photoelectric devices. A built-in electric field and an II-type energy band structure of the GeSe / Si heterojunction can quickly separate photon-generated carriers to form light current, so that high responsivity of 29.8 A / W, high quantum efficiency of 6959.7% and quick light response time of 8.5 / 23.7 us are realized.

The invention discloses a water-based photoresponse type rosin-based aggregation-induced emission amphiphilic molecule as well as a preparation method and application thereof. The molecular structural formula of the water-based light response type rosin-based AIE amphiphilic molecule is shown in the specification, or n ranges from 15 to 30. According to the water-based light-responsive rosin-based AIE amphiphilic molecule, a tetraphenyl ethylene or cyanostilbene fluorophore is introduced into the anhydride part of maleopimaric acid through an imidization reaction, and groups such as sodium carboxylate, amino acid sodium or polyethylene glycol are introduced into the carboxylic acid position to prepare the water-based light-responsive rosin-based AIE amphiphilic molecule. The solid of the molecule has blue fluorescence emission, and can be used for dyes or solid anti-counterfeiting materials. A photoresponsive AIE aqueous solution is prepared by using the amphiphilic molecule alone or compounding the amphiphilic molecule with dodecyl polyoxyethylene ether, and the photoresponsive AIE aqueous solution can be used for water-based anti-counterfeiting ink, cell imaging or 4-nitrophenol detection and the like.

The invention provides an N-doped TiO2-BiVO4 heterojunction photocatalytic coating as well as a preparation method and application thereof, and belongs to the technical field of photocatalytic materials. Nitrogen doping is achieved through nitrogen source pyrolysis, an N-doped Bi-Ti heterojunction is formed, the molar ratio of Bi to Ti can be optimized, a tight heterojunction interface is formed, a light absorption edge is subjected to red shift to 600 nm, the carrier separation efficiency is improved, N doping is introduced into an intermediate energy level, the light response range is widened through BiVO4, the net degradation rate of formaldehyde within 24 hours reaches 78% through cooperation of the two, and the light response range is widened through BiVO4. Meanwhile, the problems that an existing photocatalytic coating is low in visible light utilization rate and poor in adhesive force are solved.

The invention provides an LED light output intelligent control method based on high-frequency driving, and relates to the technical field of intelligent control, and the method comprises the steps: applying a high-frequency detection pulse sequence with the same amplitude and increasing frequency to each lamp bead in an LED array, collecting the light response time constant and peak light intensity data of the lamp bead under the excitation of the detection pulse sequence, and obtaining the light response time constant and peak light intensity data of the lamp bead; and a frequency-light response feature vector matrix is constructed, and grouping management and distributed prediction control of the LED array are realized. According to the invention, the light response characteristic difference between the lamp beads is fully considered, and the accuracy and uniformity of light output control are improved; meanwhile, by establishing a distributed predictive control model, the optimal driving frequency and duty ratio parameter combination of each group can be predicted in real time, the problem of light response nonlinearity under the high-frequency driving condition is effectively solved, and the stability and efficiency of dynamic light output are improved.

The invention discloses a circuit board detection method and system based on computer vision, and relates to the technical field of circuit board detection, and the method comprises the following steps: obtaining the temperature field distribution data of the surface of a circuit board based on the structural deformation of the circuit board caused by non-uniform heating after high-temperature operation, establishing a temperature-associated morphological mapping model according to the temperature field distribution data, and generating a circuit board deformation reference band updated along with time through the morphological mapping model; and constructing a dynamic focal plane tracking chain in an image acquisition process by using the deformation reference band, converting height change information of a corresponding region in the deformation reference band into a focal length displacement control instruction, and driving focal length adjustment of the camera device in real time. Through dynamic focal plane tracking and illumination response control, the focal length is matched with circuit board deformation in real time, the illumination difference is compensated, dynamic balance of image definition and brightness is achieved, and therefore the consistency of circuit board detection images and the accuracy of defect recognition are improved.

This invention belongs to the field of functional materials technology, and more specifically, relates to a linear polymer, a photoreactive luminescence-enhanced crosslinked polymer, and their applications. The linear polymer is obtained by homopolymerization or copolymerization with other monomers of an organometallic complex. The linear polymer emits almost no light under ultraviolet or visible light excitation, but undergoes a photochemical reaction under strong ultraviolet irradiation, resulting in polymer crosslinking and enhanced luminescence. The degree of crosslinking, the intensity of luminescence after crosslinking, and the color of the luminescence can be controlled by the ratio of the polymerizable monomer to the comonomer of the organometallic complex. The crosslinked polymer can be used in fields such as information encryption, security anti-counterfeiting, and data storage.

The invention discloses a p-type tungsten disulfide nanotube bundle, a preparation method thereof and application of the p-type tungsten disulfide nanotube bundle in a photoelectric detector with adjustable light response linearity, and the method comprises the following steps: depositing an Au film on a SiO2 / Si substrate, and carrying out annealing to form a zero-dimensional Au nanoparticle catalytic layer; the method comprises the following steps: respectively placing tungsten trioxide (WO3) powder and sulfur (S) powder in different areas of a single-temperature-area tubular furnace, heating to 850-1000 DEG C in an Ar / H2 mixed gas low-pressure atmosphere, and reacting to generate a WS2 nanotube bundle with a multi-wall hollow structure; the obtained material has a cluster-shaped morphology in dense interlaced distribution, and shows stable p-type conductive characteristics. A photoelectric detector prepared based on the material has high responsivity (2.7 * 10 < 4 > A / W), high detection rate (1.6 * 10 < 13 > Jones) and quick response (15 ms) in a wave band of 375-1550 nm, and keeps stable performance in a range of 10-300 K. The method is simple in process, the growth process of the tungsten disulfide nanotube bundle can be accurately controlled, the polarity of tungsten disulfide is changed to be p-type, and large-scale preparation can be achieved.

The application provides a solar cell, a battery assembly and a photovoltaic system. The solar cell comprises: a leakage region between a first region and a second region; the leakage region comprises a first sub-region and a second sub-region; a first doped layer is located in the first region, and a second doped layer is located in the second region; a first leakage doped layer is located in the first sub-region, and a second leakage doped layer is located in the second sub-region; the first leakage doped layer is connected with the first doped layer, and the second leakage doped layer is connected with the second doped layer; the first leakage doped layer is not in contact with a preset region of a side surface of the first leakage doped layer adjacent to a base of the second sub-region; and the second leakage doped layer is not conductive with the first leakage doped layer when the light intensity is less than a set value. The application can improve the weak light response of the solar cell assembly.

The invention relates to the technical field of biochemical engineering, in particular to a method for efficiently converting 7-dehydrocholesterol into vitamin D3. The method comprises two steps of photoreaction and thermal isomerization. Wherein in the photoreaction stage, the reaction selectivity and the yield are remarkably improved by adopting 285 nm ultraviolet irradiation and controlling the energy density within the range of 5-8 W / mL, and the photoreaction yield can reach 60%-70%; a high-temperature condition of 70 + / -2 DEG C is adopted in the thermal isomerization stage, the reaction is carried out in a short time, the reaction period is greatly shortened, the yield is improved, and the thermal isomerization yield can reach 80%-90%; the total yield is superior to that of the traditional process. The method has the advantages of high reaction selectivity, few impurities, high yield, short period and the like, is suitable for industrial production of vitamin D3, and has a wide application prospect.

The invention discloses a preparation method of a light response type UV regulation and control material and a 3A optical film, and relates to the technical field of optical films.The preparation method comprises the steps that spiropyrane is dissolved in ethyl acetate to form an oil phase, and first liquid is obtained; dispersing nano silicon dioxide in a water phase containing gelatin to obtain a second liquid; stirring and mixing the first liquid and the second liquid to form an emulsion; evaporating the emulsion at 55-65 DEG C for at least 12 hours to form a spiropyrane-silicon dioxide hybrid nanocapsule; the spiropyrane-silicon dioxide hybrid nanocapsule is dispersed into light-cured polyacrylate, and a light response type UV regulation and control material is obtained; the 3A optical film comprises a light response type UV regulation and control layer, and the material of the light response type UV regulation and control layer is a light response type UV regulation and control material. The 3A optical film realizes flexible regulation and control of absorption of ultraviolet rays according to different weather scenes.

The utility model provides live fresh storehouse circulation ecological system, and the water after biochemical module processing flows through post sand filter tank, disinfection module and light reaction module in proper order. Post sand filter tank is responsible for filtering off suspended particles and other impurities in water, further improves the purity of water quality, disinfection module carries out sterilization treatment to water body, effectively kills the residual harmful microorganism, ensures the safety of water quality, and water body enters light reaction module, in light reaction module, algae carries out photosynthesis under the light condition, utilizes carbon dioxide and nutrient salt in water to grow and breed, and the seawater after this series of processing is transported to the temporary breeding system, provides a clean, healthy and rich algal bait growth environment for live fresh, thereby effectively solve traditional temporary breeding system in water quality is easy to be contaminated, algal bait supply is not stable and disinfection maintenance is not convenient and so on problem, greatly improves the survival rate and growth efficiency of temporary breeding organism.

The invention relates to the technical field of vehicle lighting, in particular to an electric vehicle photoinduction self-adaptive headlight system which comprises a deceleration state recognition module, an illumination trend judgment module, a charge state division module, a lighting power setting module and an output control execution module. According to the method, a deceleration state identification result is established by synchronously analyzing a current change direction and a brake signal state, a continuous sampling illuminance change rate is introduced to construct a trend judgment index, a low-illuminance approaching trend is judged in combination with an illumination decline intensity and a continuous period, and then the real-time charge state of a battery is collected and affiliated to a grading label; a target output power and an adjusting rhythm are set by matching a power regulation and control strategy, a linearly or non-linearly increasing lightening power sequence is set under different electric quantity conditions, a power control result is converted into a PWM instruction to be dynamically output to a headlight driving circuit, and self-adaptive adjustment of the brightness of the headlight of the electric vehicle under the conditions of illumination decreasing and electric quantity changing is achieved.

The invention discloses a bullet hole positioning target picking system based on a WiFi local area network and camera visual recognition, and relates to the technical field of shooting training auxiliary equipment. Comprising a visual acquisition module, a WiFi communication module, a main control module, a target picking execution module and a power supply module, the visual acquisition module acquires a target sheet image through a high-definition camera, and optimizes the image quality in combination with a light sensing unit and an image preprocessing unit; the WiFi communication module constructs a wireless local area network to realize two-way transmission of image data and control instructions among the modules; the main control module completes accurate bullet hole positioning through image recognition and positioning calculation and generates a target picking control instruction; the target picking execution module completes target paper clamping, recycling and replacing based on the control instruction, and closed-loop control is achieved through position detection. The bullet hole positioning precision is improved through self-adaptive image preprocessing and target sheet position correction, bullet hole positioning and target picking full automation are achieved, and the method can be widely applied to scenes such as shooting training and competitions.

This invention provides an N-doped TiO₂ 2 -BiVO 4 This invention relates to heterojunction photocatalytic coatings, their preparation methods, and applications, belonging to the field of photocatalytic materials technology. The invention achieves nitrogen doping through nitrogen source pyrolysis, forming a N-doped Bi-Ti heterojunction. Furthermore, by optimizing the Bi:Ti molar ratio, a tight heterojunction interface can be formed, redshifting the light absorption edge to 600 nm and improving carrier separation efficiency. N doping introduces intermediate energy levels, resulting in BiVO₄… 4 By broadening the light response range, the two work together to achieve a net formaldehyde degradation rate of 78% in 24 hours, while also solving the problems of low visible light utilization and poor adhesion of existing photocatalytic coatings.

The invention discloses a multi-component light-operated reversible composite bonding system, and belongs to the technical field of bonding materials. The preparation method comprises the following steps: fully mixing light response micromolecules and a polymer under light assistance, stirring, heating to 50-60 DEG C, keeping for a period of time, spreading the mixture, drying, pressing into sheets, cooling, solidifying, and cutting into strips to obtain the reversible composite bonding system with light-controlled high bonding force mode and low bonding force mode. The light-sensitive adhesive is attached to the surface of a base material, illumination is switched into a soft low-bonding-force mode, and the light-sensitive adhesive can adapt to various heterogeneous special-shaped interfaces. And after the bonding is finished, standing and switching to a high-bonding-force mode to form the long-term stable high-strength structural adhesive. The mode can be switched back to the low bonding force mode through illumination again, and at the moment, the bonding agent can be easily washed away only through a common solvent such as ethyl alcohol. According to the invention, based on the light-induced bonding strength change, a non-contact and simple light-operated reversible composite bonding system is realized, and the light-operated reversible composite bonding system can easily adapt to complex dynamic requirements and cope with various industrial and living bonding scenes.

The utility model relates to the technical field of advertising devices, in particular to an outdoor solar integrated advertising brightening device which comprises an installation frame, a lamplight area, a photovoltaic panel area, a controller and a storage battery are arranged on the installation frame, a lamp body is arranged in the lamplight area, the photovoltaic panel area is provided with a photovoltaic panel used for photovoltaic power generation, and the controller is connected with the controller. The photovoltaic panel is made of a black monocrystalline silicon wafer; the controller is a light induction controller and is electrically connected with the photovoltaic panel, the storage battery and the lamp body. The device is reasonable in structure, safe, reliable, energy-saving and environment-friendly, reduces stay wires, and meets the requirements of urban automatic quantification.

The present application relates to the technical field of molecular sieve, in particular to a kind of molecular sieve self-assembly light response membrane and its preparation method and application.Utilize the supramolecular assembly based on dithiophene ethylene derivative and calabash urea as basic functional unit, after being coated on substrate, it is introduced into oil phase solution, and composite polyamide membrane is formed on substrate surface using interfacial polymerization reaction.Based on the host-guest recognition ability of dithiophene ethylene derivative and calabash urea, a dynamic adjustable recognition system is formed.Under light condition, the recognition ability of the whole system to molecule is influenced by changing the configuration of molecule.The self-assembly light response membrane has good dye interception effect and small cut-off molecular weight, and can realize accurate screening of similar molecular weight dye molecules, and is expected to be widely applied in wastewater treatment field.

The utility model discloses a light-dark alternating type photobioreactor for sewage treatment. The light-dark alternating type photobioreactor comprises a circulating flow channel, a circulating pump, a circulating pump fixer, a circulating pump controller and a simulated light source or an actual light source, the circulating flow channel is provided with a water inlet pipe, a water outlet pipe and a water distributor, sewage enters the circulating flow channel through the water inlet pipe and the water distributor, and the circulating pump is arranged in the circulating flow channel and drives the sewage and the microalgae to be mixed and circularly react; the circulating flow channel is provided with an opening facing the vertical upper portion, a light reaction area and a dark reaction area, the light reaction area and the dark reaction area are arranged in the flowing direction of the circulating flow channel in a spaced mode, a light shielding plate is arranged at the opening of the dark reaction area, and the simulated light source or the actual light source irradiates into the circulating flow channel from the opening of the light reaction area to form the light-dark alternating effect with the dark reaction area with the light shielding plate.

The invention discloses a Bi12O17Cl2 / ZnCdS heterojunction photocatalyst as well as a preparation method and application thereof, belongs to the field of photocatalysts, and solves the problem that a CdS-based photocatalyst is limited in degradation efficiency. The preparation method comprises the following steps: dissolving Bi (NO3) 3.5 H2O, KCl and NH4Cl in an ethylene glycol solution, adjusting the pH value to 8-10, carrying out a hydrothermal reaction, and calcining the product to obtain a Bi12O17Cl2 precursor; the preparation method comprises the following steps: dispersing a Bi12O17Cl2 precursor in deionized water, sequentially adding zinc acetate dihydrate, cadmium acetate dihydrate and a Na2S. 9H2O solution to make the materials fully contact with Bi12O17Cl2, adjusting the pH value to 9-11, and carrying out a hydrothermal reaction; the problems of insufficient photoresponse, serious photocorrosion, carrier recombination and the like existing in an existing heterojunction system are solved, and unique advantages are shown in the aspects of stability and degradation efficiency.