822 results about "Visible light irradiation" patented technology

The invention provides a redox imidazole covalent organic framework material as well as a preparation method and application thereof, belongs to the technical field of material preparation and photocatalytic preparation of hydrogen peroxide, and aims to solve the technical problem of low activity of a current covalent organic framework in preparation of hydrogen peroxide. The preparation method of the imidazole-connected redox type imidazole covalent organic framework material comprises the following steps: respectively reacting a reactant 2, 7-di-tert-butylpyrene-4, 5, 9, 10-tetraketone monomer with 4, 4 ', 4', 4 ', 4', 4 ', 4', 4 ', 4', 4 ', 4', 4 ', 4', 4 ', 4', 4 ', 4', 4 ' The preparation method comprises the following steps: mixing 4, 4 '-(pyridine-2, 4, 6-triyl) tribenzaldehyde and a tri (4-formylphenyl) amine monomer, adding a solvent and a catalyst, uniformly stirring, and reacting to obtain the redox type imidazole covalent organic framework material after the reaction is finished. The application comprises the following steps: adding the covalent organic framework, oxygen and the sacrificial agent into water, and reacting under the irradiation of visible light. The preparation method is green, environment-friendly, simple and easy to implement, the prepared material has good thermal stability, and efficient visible light photocatalysis preparation of hydrogen peroxide can be achieved; meanwhile, the catalyst can be recycled and has good photocatalytic stability.

The preparation method comprises the following steps: by taking 2, 2 '-[4-(4-aminophenylazo) phenylimine] diethanol and phenol as raw materials, preparing a bisazobenzene compound according to a molar ratio of 1: 1, carrying out nucleophilic substitution on the compound and alkyl bromide according to a molar ratio of 1: 1 to prepare a bisazobenzene monomer, and carrying out side-chain type photoresponse bisazobenzene polyurethane on the bisazobenzene monomer to prepare the side-chain type photoresponse bisazobenzene polyurethane. And carrying out a reaction on the bisazobenzene monomer and diisocyanate urethane to obtain the side chain type photoresponse bisazobenzene polyurethane. The bis-azobenzene polyurethane has obvious trans-cis configuration change along with the increase of ultraviolet irradiation time in a tetrahydrofuran solution, and gradually recovers the trans configuration under the irradiation of visible light. Besides, the bisazobenzene polyurethane and polyurethane are subjected to melt blending to prepare a composite material film, and the composite material film has an obvious light-induced bending phenomenon under ultraviolet irradiation.

The invention relates to preparation of a covalent organic framework material (COF) containing methyl and thiophene and application of the covalent organic framework material in production of hydrogen peroxide. Two thienyl covalent organic framework materials are prepared respectively, and the problem that the yield of hydrogen peroxide produced through photocatalysis of an existing covalent organic framework material is not high is solved. A solvothermal method is adopted for preparation, the preparation process is simple and efficient, the solvent consumption is low, the method is green and environmentally friendly, the yield is high, the problem that the energy utilization efficiency is too low due to mutual compounding of photon-generated carriers and electrons in the photocatalysis process is solved, and the efficiency of photocatalytic production of hydrogen peroxide is effectively improved. The BTTPa-2COF is applied to photocatalytic production of hydrogen peroxide, experimental results show that the BTTPa-2COF has excellent performance of photocatalytic production of hydrogen peroxide, and the performance of hydrogen peroxide production can reach 3680 [mu] molg <-1 > h <-1 > under visible light irradiation.

The invention discloses fluorescent electrophoretic ink and a display device, and relates to the technical field of electrophoretic display. The fluorescent electrophoretic ink comprises an electrophoretic medium, and first electrophoretic particles, second electrophoretic particles and third electrophoretic particles dispersed in the electrophoretic medium; the first electrophoretic particle has a first charge polarity, the second electrophoretic particle has a second charge polarity, and the third electrophoretic particle has the first charge polarity or the second charge polarity; the first electrophoretic particles present a first color under visible light irradiation, and the second electrophoretic particles present a second color under visible light irradiation; and the third electrophoretic particles are in a colorless transparent state or a semitransparent state under the irradiation of visible light, and are in fluorescence emission of a third color under the irradiation of invisible light with a preset wavelength. The display effect of fluorescent electrophoresis display is improved.

A method of depositing at least one fluoride layer comprises: depositing the fluoride layer on a substrate by photoassisted atomic layer deposition, ALD, in a plurality of ALD cycles. The method comprises irradiating the fluoride layer with UV / VIS light at least in some of the plurality of ALD cycles, such as in all ALD cycles, to anneal at least one potential crystal defect in the fluoride layer. The methods can be performed using an apparatus for atomic layer deposition of at least one fluoride layer, thereby producing an optical element comprising a substrate coated with such a fluoride layer, which can be used in an optical arrangement comprising at least one such optical element.

The invention discloses a process for synthesizing ammonia by coupling low-temperature plasma with electro-catalysis in the field of clean energy and green chemical industry, which comprises the following specific steps: mixing air and water vapor, feeding the mixture into a dielectric barrier discharge reactor, filling the reactor with a multi-stage heterojunction gradient doped carbon coated catalyst, generating active gas containing NOx under pulse high voltage, and condensing and then entering an electrocatalytic reduction unit. And an electro-catalysis product enters a photo-thermal separation module integrated with a Janus type photo-thermal electrode, the temperature of the electrode is locally increased under visible light irradiation, NH3 desorption is promoted, and finally high-purity ammonia is obtained through polyimide membrane separation. The multistage heterojunction gradient-doped carbon-coated catalyst adopted in the process is prepared through multiple steps and contains gradient-doped boron, sulfur and Au nanoparticles on the surface, NOx adsorption, electron transport and sintering resistance are synergistically improved, and efficient ammonia synthesis under mild conditions is achieved.

This invention discloses a visible-light-responsive dynamically covalently cross-linked self-healing polyurethane and its preparation method, belonging to the field of self-healing materials technology. The material is prepared by reacting diisocyanate, long-chain diol, butanediol, trimethylolpropane, and a monool containing an azophenylboronic acid structure in a certain proportion at 60°C. This invention achieves visible-light-responsive self-healing of the polyurethane material by introducing a visible-light-responsive azophenylboronic acid structure into the polyurethane and utilizing the photoresponsive cis-trans isomerization of the azo structure to regulate the reversible breakage and recombination of the boron-oxygen hexacyclic ring. The visible-light-responsive dynamically covalently cross-linked self-healing polyurethane material prepared by this invention maintains high mechanical strength (16.47 MPa) while exhibiting a strength self-healing efficiency of 95.8% after 8 hours of visible light irradiation, showing broad application prospects in smart materials, anti-corrosion coatings, and other fields.

The invention relates to the technical field of transmission membranes, in particular to a transmission membrane based on dithienylethene and a preparation method of the transmission membrane. The transmission film comprises a base film and light-operated molecules, the base film is coated with the light-operated molecules, and the light-operated molecules have light response groups. A detection result shows that after ultraviolet irradiation, the transmission film can quickly realize complete conversion from an open loop to a closed loop; after visible light irradiation is recovered, the transmission film can efficiently and reversibly recover to an open-loop state. In addition, the transport membrane has a high on-off ratio to five ions of sodium, potassium, lithium, magnesium and calcium. The transmission membrane based on dithienylethene, which is prepared by taking terminal amino-modified dithienylethene as a basic unit, not only has abundant nano-channels, but also is endowed with the characteristic of regulating and controlling the opening and closing of the nano-pore by a photoresponse functional group, and the closing and opening of an ion channel can be accurately regulated and controlled through the alternate irradiation of ultraviolet light and visible light, so that the transmission membrane has a good application prospect. And the controllability of light-operated ion transmission is finally realized.

The invention belongs to the technical field of dressing preparation, and particularly relates to a preparation method of a photocuring methacrylated gelatin hydrogel dressing, which comprises the following steps: step 1, dissolving methacrylated gelatin in a phosphate buffer solution to prepare a methacrylated gelatin solution with the mass concentration of 5-15%; 2, adding a natural photoinitiator into the solution obtained in the step 1, and uniformly stirring and mixing; 3, adding the traditional Chinese medicine active ingredient powder, and stirring until the powder is uniformly dispersed to obtain a mixed solution; and 4, pouring the mixed solution into a mold, and curing and molding under the irradiation of visible light. Chlorophyll or riboflavin is used as a natural photoinitiator and is directly dispersed in a methacrylated gelatin solution in a physical blending mode, a curing light source enables chlorophyll to completely avoid a chemical initiator, meanwhile, the process is simplified into physical stirring to replace nanoparticle synthesis and modification, visible light reduces the risk of tissue burn, the production cost is reduced, and the method is suitable for industrial production. The method is suitable for primary medicine.

The invention discloses a preparation method of CoWO (cobalt tungsten oxide) modified NbOp-n heterojunction NbO5 / CoWO photocatalyst powder. The preparation method comprises the following steps: dissolving cobalt salt and tungsten salt in deionized water, stirring and mixing, carrying out hydrothermal reaction in an autoclave, washing and drying to obtain CoWO powder; the preparation method comprises the following steps: dissolving niobium oxalate and ammonium carbonate in deionized water, adding CoWO powder, carrying out a hydrothermal reaction in an autoclave, and carrying out washing and drying treatment to prepare NbO / CoWO photocatalyst powder. According to the method, the hydrothermal reaction temperature is regulated and controlled, and the mass ratio of raw materials is optimized, so that the catalyst forms a p-n heterojunction structure of NbOmicron flower loaded CoWOnano particles. The prepared catalyst has high norfloxacin wastewater degradation efficiency under visible light irradiation, has the advantages of simple preparation process, low reagent cost, high catalytic activity and good structural stability, and can be effectively applied to purification treatment of antibiotic polluted water.

A decorative sheet includes: an at least partially UV or visible light irradiation transparent carrier sheet; a decorative ink pattern, the ink being at least partially UV or visible light irradiation blocking; a top coating comprising UV or visible light irradiation curable material and having a top surface with first surface areas having a surface texture A and second surface areas having a surface texture B. The surface texture B being different from the surface texture A and being in alignment with the decorative ink pattern. A decorative panel is also provided that has a substrate and the decorative sheet thereon. A method of manufacturing the decorative sheet is also provided.

The invention discloses a preparation method and application of a Schottky junction ternary composite photocatalyst. The preparation method comprises the following steps: (1) respectively preparing RF powder, an EA-Fe solution and a Ti3C2MXene aqueous solution; and (2) mixing the RF powder, an EA-Fe solution and a Ti3C2MXene aqueous solution in proportion, and reacting in a dark place. The Schottky junction ternary composite photocatalyst is added into waste water containing tetracycline hydrochloride, after dark reaction adsorption equilibrium, visible light irradiation is carried out, and photocatalytic degradation is started. The RF / EA-Fe / Ti3C2-MXene composite photocatalytic material is prepared under the conditions of normal temperature and normal pressure, the conditions are mild, the mass proportion can be accurately controlled, and the RF / EA-Fe / Ti3C2-MXene composite photocatalytic material is suitable for large-scale production; and (4) the prepared composite material has the advantages of high catalytic activity, convenience in Schottky junction construction, low cost, multi-functionalization and the like.

The invention relates to the technical field of electronic devices, in particular to a single-molecule photoelectric memristor based on photoresponse rotating shaft molecules and a preparation method of the single-molecule photoelectric memristor. The single-molecule electric memristor comprises a light response rotating shaft molecule and a graphene point electrode pair, and the light response rotating shaft molecule is connected between the graphene point electrode pair. When ultraviolet light irradiates the photoresponse rotating shaft molecule, a high conductivity state occurs when the corresponding rotating shaft molecule rotates, and when visible light irradiates the photoresponse rotating shaft molecule, a low conductivity state occurs when the corresponding rotating shaft molecule rotates. Based on this, the monomolecular photoelectric memristor has high and low conductivity bistable states, and can realize rapid and reversible change of the conductivity state, thereby improving response speed, operation efficiency, and stability, flexibility and adaptability of performance. The single-molecule photoelectric memristor provided by the invention is expected to be widely applied to the fields of neuromorphic calculation, artificial intelligence, brain-like calculation and the like. The preparation method provided by the invention is simple and convenient to operate, mild in reaction condition and beneficial to industrial production.

The invention belongs to the technical field of photocatalytic materials, and discloses a preparation method of a BiOCl / BiOI composite photocatalyst for visible light degradation of rhodamine B. The energy band structure of BiOCl is regulated and controlled in cooperation with BiOI, and efficient photocatalytic decoloration of rhodamine B with wide spectral response is achieved through S-type interface charge transfer. A petal-shaped BiOCl / BiOI heterojunction with R = 8: 1, a BiOCl0. 88I0. 12 solid solution and a BiOCl0. 8I0. 2 solid solution show excellent visible light catalytic activity, and about 92.52% of rhodamine B molecules, 99.7% of rhodamine B molecules and 99.7% of rhodamine B molecules are respectively degraded by the BiOCl / BiOI heterojunction and the BiOCl0. 88I0. 12 solid solution after being irradiated by visible light for 10 minutes. The catalytic reaction accords with the two-stage one-stage kinetic law, and high photocatalytic efficiency can still be maintained after five times of circulation. The single BiOCl and BiOI respectively degrade about 64.3% and 10.02% of rhodamine B molecules under the same light reaction condition, and the catalytic reaction follows a first-level kinetic model. The preparation method has the advantages of being low in preparation temperature, simple in technological process, stable in chemical property and the like, the large-scale two-dimensional micron / nanosheet and the three-dimensional self-assembly structure of the large-scale two-dimensional micron / nanosheet can be obtained only through a hydrothermal and water bath synthesis technology, and the preparation method has great application value in the field of visible light degradation of organic pollutants.

A filtration membrane including a first layer comprising a polyester terephthalate nonwoven fabric, a second layer comprising a polyvinylidene fluoride matrix doped with a polyvinylpyrrolidone and titanium dioxide nanoparticles, and a third layer comprising a polypyrrole polymer. A method of making the membrane is also described. The membrane of the present disclosure is self-cleaning under visible light irradiation conditions.

A photocurable composition, contains a (meth)acrylic monomer component, and photopolymerization initiator, in a case in which a rectangular sheet-like test piece A1 with a length of 40 mm, a width of 10 mm, and a thickness of 1.0 mm is produced by photomodeling under conditions in which the photocurable composition is irradiated with visible light having a wavelength of 405 nm at an irradiation dose of 11 mJ / cm2 to form a cured layer A1 with a thickness of 50 μm, the cured layer A1 is stacked in a thickness direction thereof to form a rectangular sheet-like modeling product A1 with a length of 40 mm, a width of 10 mm, and a thickness of 1.0 mm, and the modeling product A1 is irradiated with ultraviolet rays having a wavelength of 365 nm at an irradiation dose of 3 J / cm2 to produce the test piece A1.

The invention provides a double-defect-modified porous carbon nitride photocatalyst prepared by one step from ferromolybdic acid as well as a preparation method and application of the double-defect-modified porous carbon nitride photocatalyst. The catalyst is of a thin-layer porous structure, so that the specific surface area of the catalyst is increased, and more surface active sites are provided for adsorption and reaction; compared with pure g-C3N4, the visible light absorption intensity of the catalyst is obviously enhanced, due to the existence of surface N vacancies and defects formed by doping of metal oxides, effective charge separation is enhanced, the photon-generated carrier separation and transfer capacity is higher under visible light irradiation, and the catalytic activity is remarkably improved. When the photocatalyst is applied to degradation of tetracycline antibiotic pollutants, photocatalytic degradation of tetracycline can be realized only under the condition of low-power 5W LED visible light, the preparation process is simple, and the cost is lower.

The invention relates to a method for synthesizing tetrasubstituted ‑1,3‑enedicarboxylic acid, and discloses a method for synthesizing tetrasubstituted ‑1,3‑enedicarboxylic acid. The method comprises the following steps: using 1,3‑enyne and iodide as raw materials, potassium formate as a formate source, DABCO as a hydrogen transfer catalyst, Ir(bpy)2(dtbpy)PF6 as a photocatalyst, and cesium carbonate as a base, introducing CO2 under normal pressure, and obtaining an enedicarboxylic acid compound with an excellent to good yield under room temperature and visible light irradiation for 24 hours. The method has mild reaction conditions, good regioselectivity, and good functional group tolerance, and makes up for many deficiencies of the prior art.

To provide an eyeball information detection apparatus capable of improving the detection accuracy. The present technology provides an eyeball information detection apparatus including: a support member that is mounted on a head of a user; a substrate provided to the support member so as to face an eyeball of the user; an irradiation system that is provided to the support member and includes at least one light source that emits non-visible light towards the substrate; at least one optical element that is provided to the substrate so that the at least one optical element is irradiated with the non-visible light and generates a virtual light source of the non-visible light; a light reception system that receives the non-visible light reflected on the eyeball via the optical element; and a detection system that detects information about the eyeball on the basis of an output from the light reception system.

The invention discloses a synthesis method of an unsaturated ketone or arone compound, which comprises the following steps: at a certain temperature, taking unsaturated hydrocarbon or aromatic hydrocarbon as a raw material, taking an N-hydroxyimide compound as a catalyst, adding an organic solvent for dissolving, introducing oxygen or air into a reaction solution under the irradiation of visible light, and carrying out oxidation reaction to obtain the unsaturated ketone or arone compound. And carrying out post-treatment separation to obtain the unsaturated ketone or arone. According to the method, air, oxygen-enriched gas or oxygen is used as a harmless oxidizing agent, visible light is used as an energy source to promote the reaction, and the method has the advantages that the reaction process is green and efficient, the cost is low, the dosage of the catalyst is small, and most of the catalyst can be recycled and reused; the atom economy is high.

The invention belongs to the field of organic synthetic chemistry, and relates to a preparation method of melatonin and meerythrine indole derivatives and compounds. Specifically, the indole derivative is efficiently synthesized by taking arylamine and carboxylic acid as raw materials through a one-pot two-step reaction in the presence of catalysis of ferric chloride hexahydrate (FeCl3. 6H2O), a ligand, a diazotization reagent, an additive and a solvent under the conditions of visible light irradiation, inert atmosphere and room temperature. According to the method, visible light induced iron-based LMCT catalysis and iron lewis acid catalysis functions are integrated, and efficient integration of diazotization, decarboxylation, free radical coupling and cyclization reaction is achieved. The method has the advantages that raw materials are cheap and easy to obtain, reaction conditions are mild, substrate applicability is wide, functional group compatibility is good, operation is easy, convenient and safe, and environment friendliness is achieved, gram-level scale preparation can be achieved, and a green and efficient synthesis path is provided for indole compounds with biological activity such as melatonin and meerythrine.

The invention discloses a preparation method of a 6-alkyl aza-uracil compound, which comprises the following steps: in a nitrogen atmosphere solvent, irradiating a reaction mixture of an aza-uracil derivative and carboxylic acid active ester with visible light, adding a catalyst and stirring for reaction, and after the reaction is completed, performing column chromatography separation on the reaction mixed solution to obtain the 6-alkyl aza-uracil compound. The product 6-alkyl aza-uracil compound can be prepared. The synthesis method of the 6-alkyl aza-uracil compound provided by the invention does not need to use a photosensitizer and a metal catalyst, the reaction conditions are green and mild, and the operation is simple, convenient, rapid and efficient.

The invention provides a photocatalytic composite material based on fly ash as well as a preparation method and application thereof, and belongs to the technical field of environment-friendly materials. According to the composite material, industrial waste fly ash and bismuth vanadate (BiVO4) are effectively compounded, so that the composite material shows excellent photocatalytic performance, especially can efficiently degrade organic pollutants such as formaldehyde under visible light irradiation, and has good stability and reusability. According to the composite material disclosed by the invention, the preparation cost is remarkably reduced, the resource utilization of the fly ash is also realized, and remarkable environmental protection and economic benefits are embodied. The material is particularly suitable for the fields of indoor air purification, wastewater treatment and other environmental pollution treatment, and can effectively improve air quality, protect human health and promote sustainable development. The photocatalytic composite material shows excellent catalytic efficiency in practical application, is high in adaptability and has a wide application prospect.

The invention provides a preparation method of a composite material based on quantum dots / metal organic frameworks, the composite material and application of the composite material, and belongs to the technical field of preparation and application of nanometer materials, and the composite material based on the quantum dots / metal organic frameworks is a g-C3N4 QDs / NH2-UiO-66 composite material with visible light response. The g-C3N4 quantum dots formed in situ are deposited on NH2-UiO-66 nanocrystals to form a spherical nanoreactor, and degradation products with high biodegradability and low toxicity are generated through photocatalytic degradation. Compared with pure g-C3N4 QDs and NH2-UiO-66, the g-C3N4 QDs / NH2-UiO-66 composite material has the advantages that the capability of photocatalytic degradation of tetracycline under the irradiation of visible light is obviously enhanced; the separation efficiency is improved by increasing the number of photocatalytic active sites and delaying effective charge transfer recombination of photo-induced electron hole pairs.

The invention discloses a method for photocatalytic synthesis of phosphorylated thiophene compounds, and belongs to the technical field of organic synthesis. Carbon quantum dots are used as a photosensitizer, phosphine oxide, thiophene and derivatives thereof are used as raw materials, 2-methyltetrahydrofuran and water are used as solvents, the temperature is controlled to be 25-30 DEG C, reaction is performed for 12-24 h under visible light irradiation, and then column chromatography separation is performed to obtain the phosphorylated thiophene compound. The cheap and easily available carbon quantum dots are used for replacing a noble metal catalyst, so that the method has the advantages of mild reaction conditions, easiness in preparation of the catalyst, green and environment-friendly solvent system, energy consumption reduction, high product yield and the like, and a green synthesis path is provided for phosphorylated thiophene compounds.

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 present invention discloses a light-responsive Pickering emulsion that is synergistically stabilized by a spiropyran ionic liquid and UiO-66-NH2. The Pickering emulsion comprises an oil-water phase, and its stabilizer is a spiropyran ionic liquid and a metal-organic framework material UiO-66-NH2. The stable Pickering emulsion can undergo demulsification under additional visible light irradiation. When further irradiated with ultraviolet light, the system can be re-emulsified to form a stable Pickering emulsion. The Pickering emulsion provided by the present invention can be used for the Click reaction of hydrophilic azide compounds and terminal alkynyl compounds. Through reversible visible light and ultraviolet light regulation, the catalyst and spiropyran ionic liquid can be recycled, and the Pickering emulsion has application value in the fields of controlled drug release and sustainable catalysis.

A quantum dot light-emitting device and a preparation method therefor, and a display apparatus. The quantum dot light-emitting device comprises: a quantum dot light-emitting layer; a carrier transport layer, which is located on at least one side of the quantum dot light-emitting layer; and a monomolecular layer, which is located between the carrier transport layer and the quantum dot light-emitting layer, wherein the material of the monomolecular layer is configured in such a way that a molecular configuration thereof is converted from a cis-configuration to a trans-configuration under a visible light irradiation condition or a heating condition, and the molecular configuration thereof is converted from the trans-configuration to the cis-configuration under an ultraviolet irradiation condition, and the molecular chain length of the trans-configuration is greater than the molecular chain length of the cis-configuration.

The invention discloses a method for preparing a metal particle highly-dispersed anchoring catalyst based on a photo-thermal coupling subcritical technology and application. The preparation method of the catalyst comprises the following steps: uniformly dispersing a metal salt and a carrier material in ultrapure water, transferring to a photo-thermal coupling reactor, and sealing; forming a subcritical fluid under the conditions of heating, pressurizing and visible light irradiation; the dispersity of the metal particles is remarkably improved in a high-temperature environment, and the interaction between the carrier and the nanoparticles is enhanced under the combined action of high pressure and illumination, so that the anchoring stability of the catalyst is improved. Compared with a traditional photodeposition chemical method, the catalyst prepared by the method has obvious advantages in the aspects of dispersity and stability, and shows excellent catalytic performance in the fields of biomass catalytic oxidation, sterilization reaction and the like.

The invention discloses a photocatalytic synthesis method of a trifluoromethyl-containing benzodihydropyran-4-ketone compound, which comprises the following steps: reacting a 2-allyloxy benzaldehyde compound shown as a chemical structural general formula (I) with sodium trifluoromethanesulfinate in an organic solvent under the irradiation of visible light to obtain the trifluoromethyl-containing benzodihydropyran-4-ketone compound. The benzodihydropyran-4-ketone compound containing trifluoromethyl is obtained, and the structural general formula of the benzodihydropyran-4-ketone compound containing trifluoromethyl is shown in a formula (II). The synthesis method provided by the invention adopts low-cost sodium trifluoromethanesulfinate as a raw material, does not need to additionally add a transition metal catalyst, a photocatalyst, an oxidizing agent and the like, and has the characteristics of mild reaction conditions, simple synthesis and post-treatment processes, high reaction atomic efficiency, high target product yield, low preparation cost, environmental friendliness and the like; the method is suitable for large-scale industrial production application.