223 results about "Photothermal effect" patented technology

The invention relates to a water treatment and membrane separation technology, and provides an integrated catalytic separation membrane, a preparation method thereof, and a water treatment method and system. According to the membrane, polyvinylidene fluoride is used as a continuous phase to form a porous matrix, and cerium dioxide is embedded and fixed in a mode of uniform dispersion in a membrane body in a phase inversion membrane forming process; in the presence of illumination and peroxysulfate, active species are generated through in-situ activation on a membrane-water interface, and membrane separation is completed synchronously. The water treatment method comprises the following steps: adding peroxymonosulfate or peroxydisulfate into a water body to be treated, and filtering through the membrane under illumination; the photothermal effect generated by organic matter degradation intermediates in operation inhibits membrane pollution and maintains flux. According to the invention, short-range coupling of active sites and mass transfer channels is realized, the medicament and energy utilization rate is improved, the coating stripping and metal dissolution risk is reduced, and the method is suitable for drinking water pretreatment, reclaimed water deep treatment and treatment of water containing natural organic matters / humic acid.

The invention discloses a real-time operation optimization method and system for a multi-energy complementary electrolytic hydrogen production system, and the method comprises the steps: collecting real-time parameters of each module of the system, and inputting structured process knowledge to guide a neural network to predict a parameter change trend; based on a prediction result, constructing an optimization main model by using a distributed robust opportunity constraint programming algorithm, decomposing sub-models through a multi-main-body collaborative optimization algorithm based on ADMM, and solving the sub-models to obtain preliminary optimization parameters; and the photothermal effect is combined to induce the water phase regulation and control platform to regulate the medium state and the system operation parameters, closed-loop regulation is formed, and the final optimization parameters are output after the parameter deviation reaches the standard through iteration. The system comprises a multi-parameter collaborative acquisition unit, a structured knowledge driven prediction unit, a distributed robust optimization modeling unit, a multi-subject collaborative solving unit, a closed-loop parameter adjustment unit and an iterative optimization output unit, and all the units collaboratively realize real-time optimization of the system, so that the operation stability and economy are improved.

The invention belongs to the field of biological medicine and material science, and particularly relates to an intelligent response type piezoelectric nanofiber dressing and a preparation method and application thereof. According to the preparation method, polyvinylidene fluoride-trifluoroethylene, a high polymer material and inorganic nanoparticles are blended and spun through an electrostatic spinning technology, and then a photo-thermal component coating is subjected to surface in-situ oxidation and self-polymerization, so that the composite fiber membrane is prepared. Under the stimulation of ultrasound (US) and near-infrared laser (Laser), the fiber membrane can cooperatively activate the piezoelectric effect and the photothermal effect, generate a dynamic electric field and local high temperature, realize multi-mode cooperative killing of bacteria (the antibacterial rate exceeds 99%), and simulate an endogenous electric field to promote cell migration and wound healing. The dressing has good mechanical properties (the Young modulus is 15-20 MPa), hydrophilicity (the contact angle is about 30 degrees), biocompatibility and stability, is suitable for treatment of chronic infected wounds such as diabetes mellitus and the like, and has the advantages of on-demand activation and intelligent response.

The invention discloses an integrated nano platform for bimodal detection and synergistic sterilization of pathogenic bacteria as well as a preparation method and application of the integrated nano platform, and belongs to the technical field of food safety. The platform is composed of a multifunctional nano probe (MPDA / Pd SA-DA-CDs / Apt) and a magnetic separation assembly (MNRs / PGA / AM). The probe integrates enzyme-like catalysis and photo-thermal performance and is used for generating colorimetric and photo-thermal dual-mode signals so as to realize high-sensitivity and high-reliability detection of pathogenic bacteria. The magnetic separation assembly is used for specifically capturing and enriching target bacteria and eliminating matrix interference. After detection is positive, the platform can immediately start secondary propulsion synergistic sterilization: firstly, the action distance is shortened through magnetic aggregation, and then pathogenic bacteria are efficiently inactivated and biological membranes are disintegrated by utilizing the synergistic effect of near-infrared laser excitation photothermal effect and active oxygen. According to the invention, the integration of detection and disinfection is realized, the operation is convenient, and the method has important application value in the fields of food safety and biomedicine.

This invention discloses a material with high photothermal conversion efficiency, its preparation method, and its application in neural modulation, belonging to the field of biomedical technology. In this method, liquid metal is ultrasonically spun into nanoscale particles. Using these liquid metal nanoparticles as templates, hollow nanoshells composed of ultra-small metal nanoparticles can be prepared through an electrocoupling reaction with a metal salt. This method is simple, easy to operate, and applicable to various metals. The prepared material with high photothermal conversion efficiency has a hollow structure, a rough surface, and pores. This unique structure endows it with a strong photon trapping ability, significantly enhancing light absorption and exhibiting ultra-high photothermal conversion efficiency. This invention allows for the injection of this material into the nerve, utilizing its excellent photothermal effect for rapid and precise neural modulation, thereby achieving effective prevention and treatment of autonomic nervous system-related diseases, and showing promising application prospects.

The invention discloses an anti-tumor bacterium medicine based on engineered Serratia marcescens and a preparation method of the anti-tumor bacterium medicine based on engineered Serratia marcescens. According to the anti-tumor bacterium medicine disclosed by the invention, attenuated Serratia marcescens is taken as a carrier, is encapsulated and then is coupled with a targeting peptide, and then is delivered into tumor tissues to play an anti-tumor role; the attenuated Serratia marcescens is subjected to metabolism to generate the prodigiosin, and the attenuated Serratia marcescens is subjected to metabolism to generate the prodigiosin; the anti-tumor bacterium drug is combined with near-infrared laser irradiation to realize an anti-tumor effect. Biosynthesis of a photosensitive natural product prodigiosin is combined with bacterial treatment, and the near infrared (NIR-II) photosensitivity and photothermal effect of the prodigiosin are innovatively utilized, so that the anti-tumor effect is enhanced, precise bacterial removal after treatment is realized, and a feasible solution is provided for clinical application of bacterial treatment.

Systems and methods for sensing vibrational absorption induced photothermal effect via a visible light source. A Mid-infrared photothermal probe (MI-PTP, or MIP) approach achieves 10 mM detection sensitivity and sub-micron lateral spatial resolution. Such performance exceeds the diffraction limit of infrared microscopy and allows label-free three-dimensional chemical imaging of live cells and organisms. Distributions of endogenous lipid and exogenous drug inside single cells can be visualized. MIP imaging technology may enable applications from monitoring metabolic activities to high-resolution mapping of drug molecules in living systems, which are beyond the reach of current infrared microscopy.

The application belongs to the technical field of targeted drugs, and discloses a carrier, a targeted nanoparticle and a preparation method and application thereof. The carrier disclosed by the application comprises darpin grafted with a dye containing a terminal carboxyl group. The targeted nanoparticle comprises the carrier and a CO releasing molecule, and the carrier coats the CO releasing molecule to form a core-shell structure. The targeted nanoparticle is based on darpin, the grafting of the dye containing the terminal carboxyl group is performed to construct the carrier, and then the carrier coats the CO releasing molecule, wherein the carrier has a targeting effect, and the photothermal effect of the carrier can realize the NIR laser controlled CO releasing or free radical stimulation, and can also target the controllable CO releasing, so that the double response releasing of exogenous CO and endogenous CO is realized, and the application has a wide application prospect.

The application provides an in-situ detection method and system for acetylene in oil based on coated hollow core fiber enhancement, relates to the technical field of optical gas sensing, and specifically captures and enriches acetylene molecules from transformer oil flowing through a selective adsorption film modified on the inner wall of a coated hollow core fiber, so that the local concentration of the acetylene molecules in the coated hollow core fiber sensing probe detection is increased by tens of times, the enriched acetylene molecules are excited by high-frequency modulated mid-infrared pump laser, the periodic photothermal effect generated is sensitively detected by in-phase transmission near-infrared detection laser in the form of phase change, the super-high sensitivity detection can be maintained, the fast response meeting the early fault warning requirement is also satisfied, differential detection is simultaneously performed on the signal generation, temperature compensation, filter adjustment and frequency adjustment are simultaneously performed, the four-stage linkage processing mechanism is utilized to perform hierarchical processing on the signal, so that the whole system can not only resist wide temperature range and strong electromagnetic environment, but also adaptively resist time-varying field interference.

The invention discloses a Co3O4-Cu2-xS composite photo-thermal catalyst as well as a preparation method and application thereof. The composite photo-thermal catalyst is prepared by taking a surfactant as a bridge and compounding Co3O4 and Cu2-xS. The composite photo-thermal catalyst has a reduced band gap width, can effectively promote migration and separation of photon-generated carriers, enhances the absorption efficiency of visible light-near infrared light, and shows excellent photo-thermal conversion performance. The composite photo-thermal catalyst can be used for constructing a Co3O4-Cu2-xS + PMS + NIR catalytic system, and peroxymonosulfate is activated under the irradiation of near-infrared light so as to degrade antibiotics in water. Experiments prove that the Co3O4-Cu2-xS + PMS + NIR system disclosed by the invention can achieve the degradation rate of 99% on levofloxacin within 20 minutes, and the generation efficiency of active species is remarkably improved through the synergistic effect of a photothermal effect and interface activation. The catalyst has broad-spectrum degradation activity on various antibiotics, keeps efficient and stable catalytic performance in a wide pH range, and shows excellent ion interference resistance and adaptability to various water bodies.

The invention discloses a photoelectrocatalysis styrene epoxidation method based on a plasmon effect assisted photothermal synergistic effect, and the method comprises the following steps: in a three-electrode system, styrene and an electrolyte containing a bromine-containing compound are mixed, and illumination and voltage are applied to the mixture, so that styrene is subjected to epoxidation reaction. According to the Au / NiCo2O4 composite electrode, Au NPs is loaded on the surface of NiCo2O4, and the styrene epoxidation efficiency is improved through the cooperation of the LSPR effect of Au NPs and the photothermal effect of NiCo2O4.

The invention discloses a Ti < 3 > C < 2 > T < x > MXene-GQD nano composite material as well as a preparation method and application thereof, and relates to the technical field of composite material preparation. The method comprises the following steps: dissolving LiF in a hydrochloric acid solution, and adding Ti3AlC2 powder to prepare a colloidal solution; the preparation method comprises the following steps: dissolving citric acid in deionized water, and then carrying out hydrothermal carbonization to prepare a GQD solution; and mixing the colloidal solution and the GQD solution, and stirring to obtain the nano composite material. According to the invention, the Ti3C2Tx MXene two-dimensional lamellar structure is utilized to stabilize the GQD nanoparticles, so that the GQD nanoparticles are uniformly dispersed and are not easy to agglomerate, and the long-term uniformity is ensured; by utilizing the photothermal effect of Ti3C2Tx MXene and the photodynamic effect of GQD, the dual photoresponse antibacterial efficiency is realized, the infection of drug-resistant bacteria can be efficiently inhibited, a non-antibiotic way is provided for treating the drug-resistant bacteria, and the infection problem and the related postoperative pain problem are effectively controlled in practice.

The invention discloses preparation and application of a liquid metal micro-nano robot for treating colitis, and belongs to the technical field of biomedical materials and micro-nano robots. The liquid metal micro-nano robot is prepared by taking liquid metal micro-droplets as a core, coating the surface of the liquid metal micro-droplets with a polyelectrolyte multilayer film through a layer-by-layer self-assembly technology, and loading a medicine (such as mesalazine) for treating colitis in the polyelectrolyte multilayer film. The liquid metal micro-nano robot realizes colon targeted aggregation after oral administration, and can generate autonomous movement and photothermal effect under the irradiation of near-infrared light, thereby realizing phototropic targeted aggregation, photothermal triggering of drug release, and drug delivery and drug delivery. The problems that an existing mesalazine preparation is low in targeted delivery efficiency and a chemically-driven micro-nano robot is low in targeted delivery efficiency in a colon area are solved.

The present application belongs to the technical field of wavefront distortion measurement, and particularly relates to a wavefront distortion measurement system and method caused by light field waist spot mismatch in a cavity enhancement system. In order to accurately capture the wavefront distortion signal caused by light field waist spot mismatch, an electro-optic modulator (EOM), a convex lens, a three-mirror ring cavity, a plane mirror, a multi-quadrant detector (MPD) and a frequency mixer are sequentially arranged on the outgoing light path of the laser. Through light field modulation, resonance amplification, phase-locked demodulation and quantitative calculation, an error signal reflecting the distortion degree of two types is extracted, the minimum measurable waist spot size and position change are derived, accurate feedback is provided for long-term stable locking of the optical cavity, additional distortion interference caused by the thermal effect of the laser is compensated, and the measurement accuracy and stability of the system are improved.

The application discloses a kind of SNPs loaded engineered escherichia coli dual-response delivery systems and its preparation method and application, the preparation method includes the engineered escherichia coli of overexpressing Flt3L and TIM-3 scFv is co-incubated with NHS-PEG-CHO, obtain aldehyde functionalized escherichia coli;After activation SNPs is reacted with TFA-hydrazine, obtain hydrazine functionalized SNPs;Aldehyde functionalized escherichia coli and hydrazine functionalized SNPs are reacted;The delivery system of the application can rely on SNPs under laser stimulation Photo-thermal effect, photodynamic effect and generate a large number of ROS, efficiently induce tumor cells to occur immunogenic cell death (ICD), and by overexpressing Flt3L and TIM-3 scFv, activate DC cell and block TIM-3 path, restore DC, T cell function, realize the efficient synergy of photodynamic therapy+photothermal therapy+immunotherapy, and then reach the effective treatment of colorectal cancer.

The invention discloses a laser coaxial coupling jet electroforming additive manufacturing nozzle and a machining system, and belongs to the technical field of metal additive manufacturing. The nozzle comprises an optical cavity sleeve, a middle cavity and a liquid outlet which are connected in series through axial threads. The optical cavity sleeve is provided with a laser incidence cavity; the middle cavity is provided with an accommodating cavity, an electrolyte inlet and an anode interface; the optical window is tightly pressed between the optical cavity sleeve and the middle cavity through a sealing ring; the hollow platinum tube is coaxially arranged in the containing cavity, and the upper end of the hollow platinum tube and the optical window form a thin water layer. Electrolyte enters from the liquid inlet, flows in the hollow platinum tube and then is ejected out from the liquid outlet at a high speed; a laser beam enters the jet flow through the incidence cavity and the optical window, forms water-guided laser through total reflection and is conducted to a deposition point. Accurate coaxial coupling of laser, a flow field and an electric field is achieved, and the efficiency, quality and precision of electroforming deposition are synchronously improved through the synergistic effect of the laser heat effect and jet flow high mass transfer.

The invention discloses a biological hybrid material as well as a preparation method and application thereof, and belongs to the technical field of environmental engineering and new materials. The activated sludge microbe loaded with positive electricity CQD and barium titanate loaded pre-oxidized MXene are combined to form the activated sludge microbe loaded with positive electricity CQD. The natural conditions of strong illumination and large day and night temperature difference in the plateau area are utilized to excite multiple effects, BTO generates a pyroelectric effect by utilizing the temperature difference, MXene and CQD generate a photothermal effect by utilizing the illumination, and TiO2 on the surface and CQD on the surface of microorganisms generate a photoelectric effect by utilizing the illumination. The synergistic effect of the effects not only effectively overcomes the inhibition of low temperature on microbial activity, but also remarkably improves the pollutant degradation efficiency. The material is particularly suitable for water purification in low-temperature areas such as the Qinghai-Tibet Plateau, efficient utilization of natural energy is achieved, and the biological treatment efficiency is remarkably improved.

This invention belongs to the field of biosensor fabrication methods, specifically relating to a composite material with photothermal effect and peroxidase-like function, and its application in biosensors. The composite material with photothermal effect and peroxidase-like function is AuNPs / Cu. 2‑x Se. Composite material AuNPs / Cu 2‑x Se was used to prepare a photothermal-colorimetric dual-mode biosensor based on magnetic separation. This magnetically separated photothermal-colorimetric dual-mode biosensor is used to detect the SRB aprA gene. The AuNPs / Cu of this invention possesses both photothermal effect and peroxidase-like dual functions. 2‑ x Se materials can generate photothermal signals. When preparing biosensors, they can simultaneously catalyze the generation of oxTMB, which has a significant photothermal effect, thereby synergistically amplifying the photothermal detection signal with oxTMB. The absorbance of the solution corresponding to oxTMB is used as a colorimetric signal to achieve excellent dual-mode analysis.

The invention discloses a silver-palladium alloy nanowire and a preparation method and application thereof, and belongs to the technical field of nano alloy materials. The preparation method comprises the following steps: (1) adding an aqueous solution of hexadecyl trimethyl ammonium bromide and an aqueous solution of dopamine hydrochloride into an aqueous solution of silver nanowires, uniformly stirring, dropwise adding an aqueous solution of sodium chloropalladate, and continuously stirring until the reaction is completed to obtain a reaction product; and (2) carrying out centrifugal washing on the reaction product to obtain the silver-palladium alloy nanowire. The prepared silver-palladium alloy nanowire material is used for catalytic reduction of 4-nitrophenol, verification of a photothermal effect and glutathione level detection, so that the application of the silver-palladium alloy nanowire material in the field of catalysis is effectively expanded; and a brand new nano-alloy material and an application approach are provided for high-sensitivity and high-selectivity detection of glutathione level due to the exertion of a photothermal effect.

This invention discloses a heterogeneous nanocatalyst for the catalytic hydrogenation of CO2 to methanol and its preparation method. The catalyst precursor comprises a CuO-ZnO composite oxide and highly dispersed Ga, which, after reduction activation, forms a heterogeneous interface structure composed of metallic Cu, ZnO, and Ga. The preparation includes: preparing the CuO-ZnO composite oxide using a co-precipitation method, then ball-milling and mixing it with solid metallic Ga to obtain the precursor, and finally activating it through in-situ photoreduction. This catalyst, when used in the CO2 hydrogenation reaction under photothermal synergistic conditions, significantly improves catalytic activity and methanol selectivity through multi-component interfacial synergy and photothermal effects.

The invention relates to the technical field of immunodetection, and discloses a tri-modal immunochromatography detection system based on bowl-shaped COF, the tri-modal immunochromatography detection system comprises a signal marker ABCPP, an immune probe, an LFIA test strip and a signal detection module; the signal marker ABCPP is composed of a bowl-shaped covalent organic framework, an aggregation-induced luminophor and mesoporous palladium-platinum nanoparticles. According to the invention, fluorescence enhancement of AIEgens and colorimetric and photothermal effects of mPdPt NPs are creatively integrated on a bowl-shaped COF single platform; the bowl-shaped COF not only serves as an optical cage to remarkably enhance fluorescence emission of BTDTA through space limitation, but also serves as optical energy gathering to enhance interaction between light and substances. In addition, energy transfer between the internal AIGens and the external mPdPt NPs synergistically amplifies the photothermal effect, so that the photothermal conversion efficiency is remarkably improved.

This invention discloses an environmentally adaptive high-energy-absorbing smart anti-corrosion coating and its preparation method, comprising: synthesizing a dipyrazole diamine chain extender, formulating a long-chain polymer backbone A and a catechol-terminated short-chain polymer B, and preparing a high-energy-absorbing smart anti-corrosion coating; the coating utilizes the interaction between dipyrazole and Zn in the long chain. 2+ Multiple coordination reduces the entropy increase effect of bond breaking and enhances energy dissipation; gradient hierarchical hydrogen bonds between long and short chains, in coordination with metal coordination bonds, act as sacrificial bonds to dissipate energy through stepwise breakage under external force; the slightly alkaline nature of seawater triggers deprotonation of catechols and reconstructs the coordination network, increasing crosslinking density and enhancing shielding; and the Fe released at the breakage site... 3+ By strongly coordinating with catechins to form a passivation layer in situ, and using its photothermal effect to drive the self-repair of the substrate, this invention solves the problem of the difficulty in simultaneously achieving high energy absorption, fatigue resistance, environmental response, efficient self-repair and intelligent corrosion prevention in offshore wind turbine tower coatings, which helps to extend the service life of wind turbine towers and ensure the reliability of the units.

The application belongs to the technical field of organic synthesis, and relates to a kind of linkage composite photothermal reagent development for reduction stress-copper apoptosis system.The application realizes a kind of linkage composite photothermal reagent development for reduction stress-copper apoptosis system, based on heptamethine cyanine skeleton, (imino) methyl phenol structure, iodine atom, nitro group are introduced, a compound is constructed.The compound can specifically recognize Cu 2+ 、S 2‑ 、SO2, can realize reduction stress response and copper apoptosis linkage, and simultaneously triggers its photothermal effect, and carries out targeted killing to cancer cells, so as to realize the treatment of cancer.

This invention discloses a smart eye mask integrating hot and cold compresses based on two-dimensional MXene photothermal material and a semiconductor cooling chip. An MXene coating is sprayed onto the back of a cotton silicate fiberglass paper, and an LED light is installed. The semiconductor cooling chip is fitted into a groove in the cotton silicate fiberglass paper, and thin copper tape is attached to both sides. A microcontroller is located in the middle area of ​​the nose bridge of the eye mask, connected to the LED light, thin copper tape, semiconductor cooling chip, and left and right sensor modules via flexible thin wires. The left and right sensor modules are respectively embedded in the inner edges of the left and right eye areas. When the LED light illuminates the back of the cotton silicate fiberglass paper, the photothermal effect of MXene generates heat, which is then transferred to the eye mask area through the thin copper tape. When switching to semiconductor cooling chip operation, the cooling surface near the eyes gradually cools down, and the heat is transferred to the eye mask area through the thin copper tape, realizing active switching between hot and cold compress modes. The advantage of this invention is that it achieves integrated assembly of the photothermal layer and the cooling chip.

The invention provides a finite element numerical simulation method based on photo-thermal lens spectrum insulating oil furfural detection, and relates to the field of numerical analysis of an insulating oil detection technology. The method comprises the following steps: constructing a geometric model comprising insulating oil containing trace furfural, an optical window and a detection plane to obtain a pump beam and a probe beam; the refractive index in the pump beam propagation process is solved; presetting extinction coefficients corresponding to the furfural with different concentrations, and obtaining photothermal effect data of the multi-concentration furfural; calculating the temperature distribution after the insulating oil absorbs energy, and describing the change relation of the refractive index along with the temperature through a thermo-optical coefficient; insulating oil temperature distribution and pump beam propagation characteristics in a steady state are obtained; solving the thermal stress of the insulating oil to the optical window sheet under the excitation of the pumping light beam; non-isothermal flowing and fluid-solid coupling behaviors of the insulating oil under the thermal lens effect are simulated, and fluid solving is carried out; the influence of the thermal lens effect on probe beam propagation is solved; and light spot distribution of the detection probe light beam is obtained.

The application provides a drug delivery system and a preparation method and application thereof, and relates to the technical field of biomedicine.The drug delivery system comprises mesenchymal stem cell exosomes, black phosphorus quantum dots and budesonide.The drug delivery system contains mesenchymal stem cell exosomes, has the functions of immune regulation, anti-inflammation and lung targeting, realizes lung targeted delivery of the black phosphorus quantum dots loaded with budesonide, and realizes precise regulation of lung temperature by utilizing the near-infrared photothermal effect of the black phosphorus quantum dots in asthma for the first time, so that local hyperthermia for allergic asthma is realized.The drug delivery system utilizes the photothermal effect of the black phosphorus quantum dots in the carrier to control the release speed of budesonide, is beneficial to maintaining the optimal drug concentration in the lung, and is expected to reduce the dosage and frequency of medication and reduce the risk of side effects.The application firstly cooperates the mesenchymal stem cell exosomes, local hyperthermia and the immune regulation effect of budesonide for the treatment of allergic asthma.

The invention discloses an on-chip stimulated Raman photo-thermal gas sensing system and method, and particularly relates to the technical field of gas analysis and measurement. Pump light and Stokes light interact with gas to be detected in a sensing waveguide evanescent field area to excite gas molecules to generate a stimulated Raman process and generate local temperature rise through thermal relaxation, so that the refractive index change of the gas is caused, and probe light generates a phase modulation signal related to the refractive index change. Phase modulation signals and background phase disturbance related to the gas photothermal effect are distinguished and differentiated, so that phase background noise is suppressed, and the signal-to-noise ratio and sensitivity of gas measurement are improved. Functional units such as the laser, the sensing waveguide and the detector are integrated into a single chip to form a gas measurement system which is compact in structure, low in power consumption and high in anti-noise capability, and the problems of weak signal, high background noise and low integration level in traditional waveguide Raman gas measurement are effectively solved.

The invention discloses application of a Zn2In2S5 / PDA photocatalytic material with a photo-thermal synergistic effect, and belongs to the technical field of photocatalytic composite materials and hydrogen peroxide (H2O2) production. The Zn2In2S5 / PDA photocatalytic material is used for photocatalytic production of H2O2, and the catalytic rate of the Zn2In2S5 / PDA photocatalytic material can reach 9180 [mu] M.h <-1 >. G <-1 >. The material is prepared through an in-situ polymerization method and comprises the following steps: firstly, carrying out hydrothermal synthesis on Zn2In2S5 nanoflowers, and then adding dopamine hydrochloride into a weakly alkaline solution containing Zn2In2S5 to carry out in-situ auto-polymerization, so as to obtain the PDA modified Zn2In2S5 composite material. According to the invention, the p-n type heterojunction is successfully constructed, the introduction of PDA not only widens the photoresponse range to the full spectrum, but also improves the microcosmic temperature of the surface of the catalyst by using the photothermal effect of PDA, effectively promotes the separation and transmission of photon-generated carriers, and optimizes the oxygen adsorption capacity. Compared with pure Zn2In2S5, the photocatalytic H2O2 production performance of the composite material is remarkably improved, the preparation process is simple, the structure is stable, and a new way is provided for efficient H2O2 production.

The invention relates to the technical field of microfluidics, in particular to a light-heat-sound microflow pump based on a metamaterial absorber and a preparation method of the light-heat-sound microflow pump. The technical key points are as follows: a bottom metal film, a dielectric layer and a top metal structure array are sequentially formed on a substrate to prepare the metamaterial absorber chip with the plasmon photothermal effect; spin-coating the metamaterial absorber chip with polydimethylsiloxane, and carrying out drying and curing treatment to obtain the metamaterial absorber chip with a light-taking effect; the optical-thermal-acoustic micro-flow pump with the fluid driving and mixing capabilities can be obtained by irradiating the metamaterial absorber chip with the optical effect by using laser, non-contact, remote and high-precision driving of micro-fluid is realized, and the optical-thermal-acoustic micro-flow pump has the technical effects of simple structure, high driving efficiency, high response speed and no need of complex external equipment.

The application discloses a multifunctional composite wound dressing with a bioactive unit and photothermal responsiveness as well as a preparation method and application thereof. First, PEI-modified nano-gold is electrostatically adsorbed to PRP vesicles to form a nano-gold-PRP vesicle complex active unit; the complex is physically mixed with gelatin and sodium alginate, and calcium ions are used to simultaneously realize cross-linking of the sodium alginate and activation of the PRP vesicles; the obtained dressing has both growth factor slow-release function of PRP sources and near-infrared photothermal effect mediated by nano-gold. The application aims to provide a novel composite wound dressing which is simple to prepare, has controllable cost, has synergistic functions and has controllable release, so as to solve many problems in the prior art and meet the urgent needs of clinical high-efficiency wound treatment products.