57 results about "Cadmium selenide" patented technology

The invention belongs to the technical field of semiconductor material synthesis, and particularly relates to a high-quantum-efficiency and high-stability cadmium selenide quantum sheet and a preparation method thereof.The high-quantum-efficiency and high-stability cadmium selenide quantum sheet is obtained after the cadmium selenide quantum sheet is dispersed in a solvent and a Z-type ligand is added into the solvent; the cadmium selenide quantum sheet is a purified cadmium selenide quantum sheet; the Z-type ligand is cadmium caprylate; the quantum chip has the characteristic of high luminescence, the quantum efficiency of the synthesized quantum chip reaches up to 95%, and compared with the prior art, the quantum efficiency of the prepared quantum chip is higher; the quantum chip has the characteristic of long-term stability, and after the synthesized quantum chip is added into the cadmium caprylate ligand, the luminous intensity can be basically kept unchanged for several months; according to the preparation method, synthesis preparation in air can be achieved, and compared with the operation that synthesis preparation needs to be carried out under nitrogen or argon, the preparation method is simpler, and the cost is saved.

A method of manufacturing a CdTe-based thin film solar cell device having a graded refractive index profile within a CdTe (cadmium telluride)-based absorber layer, comprising the steps of: a) providing a transparent substrate comprising a front electrode, b) forming a doped CdTe-based absorber layer on the substrate, c) performing an activation treatment after step b). The doped CdTe-based absorber layer in step b) is a doped CdTe-based absorber layer stack comprising a first layer and a second layer. The first layer is a first doping element-containing layer including vanadium as a first doping element, which is formed by depositing a first doping element-enriched layer followed by depositing a CdSe (cadmium selenide) layer or a CdSeTe (cadmium selenium telluride) layer, or by depositing a CdSe layer or a CdSeTe layer each doped with a first doping element. The second layer is formed by depositing a CdTe layer. The invention also relates to a CdTe-based thin-film solar cell device with gradient refractive index distribution.

The invention discloses a novel monolithic integrated lead sulfide detector and a preparation method thereof. The novel monolithic integrated lead sulfide detector sequentially comprises a bottom electrode layer, a hole transport layer, a P-type layer, an N-type layer, an electron transport layer and a top electrode layer, the P-type layer is used for absorbing photons, so that electrons in the P-type layer are transited to a conduction band, and holes are reserved in a valence band; the N-type layer is used for transmitting electrons, transmitting the electrons generated by the P-type layer to a conduction band of the N-type layer and enabling holes to stay in the P-type layer, and the electrons and the holes are separated in space; wherein the P-type layer comprises PbS (lead sulfide); and the N type layer comprises CdSe. According to the embodiment of the invention, the N-type layer of cadmium selenide and the P-type layer of PbS are utilized to construct a heterogeneous p-n junction, so that the monolithic integrated lead sulfide detector has a time constant of less than 1 microsecond, high-frame-rate work can be allowed, and rapid change of an object can be tracked.

The invention relates to a QWLED of a three-dimensional heterojunction quantum well composite light-emitting layer based on cadmium selenide and lead sulfide quantum dots and a preparation method of the QWLED, and belongs to the field of LED preparation. The QWLED sequentially comprises an electrode layer, an inorganic electron transport layer, a CdSe / PbS three-dimensional heterojunction quantum well composite light-emitting layer, an organic hole transport layer and an ITO glass substrate from top to bottom, and the CdSe / PbS three-dimensional heterojunction quantum well composite light-emitting layer is of a three-dimensional heterojunction quantum well structure formed by compounding wide bandgap cadmium selenide quantum dots and narrow bandgap lead sulfide quantum dots. The CdSe / PbS quantum well composite material prepared by the invention has a three-dimensional depletion region and a three-dimensional heterojunction structure, high quantum efficiency, good optical characteristics and structural stability, and the prepared LED device with the three-dimensional depletion region and the three-dimensional heterojunction quantum well structure has excellent electroluminescent efficiency and external quantum efficiency, and can be used as a light emitting diode device of the three-dimensional depletion region and the three-dimensional heterojunction quantum well structure. And the method has huge application potential in the fields of high-brightness, long-service-life and high-resolution display technology and the like.

The application relates to the technical field of photovoltaic cells and discloses a tellurium cadmium selenide film near-space sublimation deposition method and equipment, wherein the tellurium cadmium selenide film near-space sublimation deposition method comprises the following steps: a cadmium selenide heating chamber is used to heat cadmium selenide raw materials, a first gaseous reaction precursor is obtained, the heating temperature is T1, a cadmium telluride heating chamber is used to heat cadmium telluride raw materials, a second gaseous reaction precursor is obtained, the heating temperature is T2, T1>T2 is met, the first gaseous reaction precursor is introduced into a mixing chamber through a first gas outlet pipe, the second gaseous reaction precursor is introduced into the mixing chamber through a second gas outlet pipe, mixed gas is obtained in the mixing chamber, the mixed gas is transported to a nozzle through a connecting pipe, and the nozzle is sprayed towards a substrate, so that a tellurium cadmium selenide film is formed on the surface of the substrate. The cadmium selenide and the cadmium telluride binary alloy are used for near-space sublimation deposition, the stability of the tellurium cadmium selenide film can be remarkably improved, and the photoelectric conversion efficiency of the cell is improved.

The application belongs to the field of inorganic semiconductor material synthesis, and particularly relates to a preparation method and application of large-size two-dimensional cadmium selenide nanosheet, wherein the preparation method is to select cadmium acetate and selenium powder as solutes, mix them uniformly with amine as a solvent, and then heat to controllably synthesize two-dimensional wurtzite cadmium selenide nanosheet with ultraviolet absorption peaks of 429 nm, 456 nm and 485 nm, 518 nm; the application avoids high-temperature and high-pressure operation by controlling reaction conditions, and obtains a convenient preparation method of cadmium selenide nanosheet by selecting suitable raw materials, thereby solving related problems existing in the synthesis of cadmium selenide nanosheet; the preparation method has low cost and wide application range, the prepared cadmium selenide nanosheet has excellent optical performance in addition to different thicknesses obtained by changing temperature and reaction time, and can be widely applied in the fields of biological sensing and photocatalysis.

The invention discloses a biological photoelectric memristor based on cadmium selenide quantum dots and a preparation method thereof, and the biological photoelectric memristor comprises a transparent substrate, an ITO electrode layer, a cadmium selenide quantum dot layer as a third resistive layer, a starch and gold nanoparticle layer as a second resistive layer, a cadmium selenide quantum dot layer as a first resistive layer, and an aluminum electrode layer. The system has a photoelectric dual-modulation characteristic, not only has a data storage characteristic, but also has a visual perception characteristic, and provides a basis for realizing a sensing, storage and calculation integrated artificial vision system.

The invention discloses a carbon nanotube / cadmium selenide quantum dot heterojunction photoelectric catalyst as well as a preparation method and application thereof. The method comprises the following steps: activating single-wall and / or multi-wall carbon nanotubes by aqua regia at room temperature, dispersing the single-wall and / or multi-wall carbon nanotubes in an aqueous solution containing CdCl2. 5H2O, adding a Na2SeSO3 selenium source and 3-mercaptopropionic acid, and reacting at 110-150 DEG C, so that CdSe quantum dots with the particle size of 1-5 nm are subjected to in-situ nucleation growth on the surfaces and / or the interiors of the carbon nanotubes and form a heterojunction interface. The obtained catalyst and Nafion are prepared into ink drops, the ink drops are coated on conductive glass to construct a photocathode, in an H-type electrolytic tank with a light path, a high-purity CO2 saturated bicarbonate aqueous solution is used as an electrolyte, Ag / AgCl is used as a reference electrode, and under irradiation of an LED light source with the maximum wavelength being 450 nm and bias voltage ranging from-0.1 V (vs. RHE) to-1.0 V (vs. RHE), CO is generated through water-phase photoelectrocatalysis CO2 reduction. The photoelectrocatalyst has the characteristics of simple synthesis method and excellent photoelectrocatalytic reduction effect of carbon dioxide.

The invention relates to the technical field of building materials, and discloses a self-cleaning exterior wall coating which comprises the following components in parts by weight: 30-50 parts of titanium dioxide; 1 to 5 parts of silver nanoparticles; 2 to 10 parts of cadmium selenide quantum dots; the invention also provides a preparation method of the self-cleaning exterior wall coating, and the preparation method comprises the following steps: S1, preparation of a TiO2 / AgNPs / CdSe composite material: respectively adding prepared silver nanoparticles and cadmium selenide quantum dots into TiO2 sol, and carrying out stirring, mixing and quality removal operation; and S2, preparing a coating solution. The TiO2 / AgNPs / CdSe composite material is prepared, ethanol is optimized to adjust the flowability of the coating, an ultraviolet curing process is adopted, and the thickness of the coating is accurately controlled, so that efficient photocatalysis of the coating under visible light is realized, the self-cleaning capability is enhanced, and the adhesive force and weather resistance of the coating are improved.

This invention discloses a method for preparing vicinal diamine derivatives, belonging to the field of pharmaceutical intermediates and organic synthesis technology. Specifically, under an inert atmosphere, an aldehyde imine, an N-aryl tertiary amine, a base, a cadmium selenide quantum dot catalyst, and a solvent are mixed and reacted under blue light irradiation for 8-24 hours. After extraction with ethyl acetate and saturated brine, the organic phase is collected, dried, the solvent is removed by vacuum distillation, and purified by column chromatography to obtain the vicinal diamine derivatives. The vicinal diamine derivatives synthesized by this invention can be used as synthetic intermediates and metal ion chelating agents in drug synthesis and fine chemical industries.

Systems and methods for providing alternative fuel, in particular hydrogen photocatalytically generated by a system comprising photoactive nanoparticles and a nitrogenase cofactor are provided. In one aspect, the system includes a water soluble cadmium selenide nanoparticle (CdSe) surface capped with mercaptosuccinate (CdSe-MSA) and a NafY.FeMo-co complex comprising a NafY protein and an iron-molybdenum cofactor (FeMo-co), wherein the CdSe-MSA and NafY·FeMo-co complex are present in about 1:2 to 1:10 molar ratio.

The application discloses a phosphorus-doped cadmium selenide target material and a preparation method thereof, and belongs to the technical field of semiconductor materials. In the application, cadmium powder and red phosphorus powder are uniformly mixed, and then are subjected to two-stage heating and heat preservation treatment at a specific temperature to obtain cadmium phosphide powder suitable for preparing the phosphorus-doped cadmium selenide. Then, the cadmium phosphide powder is uniformly mixed with cadmium selenide powder, is put into a vacuum hot-pressing furnace, and is subjected to two-stage heating and heat preservation treatment at a specific pressure and temperature. Then, the mixture is hot-pressed, and finally is cooled to room temperature to obtain the phosphorus-doped cadmium selenide target material. The phosphorus-doped cadmium selenide target material has high relative density, uniform composition, a surface without defects, no pores and white spots, and low contents of free substances and oxygen.

The present invention discloses a quantum dot laser with a low threshold and a preparation method thereof, which includes a quartz substrate, a silica periodic grating, a quantum dot layer, and a silica protective layer stacked in sequence. The quantum dot layer is composed of closely packed mercury selenide quantum dots with a diameter of 4.8 nm to 6.6 nm, mercury sulfide quantum dots with a diameter of 4 nm to 5.2 nm, quantum dots with a core / alloy / shell structure of mercury selenide / mercury cadmium selenide / cadmium selenide with an effective exciton diameter of 4.8 nm to 6.4 nm, or quantum dots with a core / alloy / shell structure of mercury sulfide / mercury cadmium sulfide / cadmium sulfide with an effective exciton diameter of 4 nm to 5 nm. The present invention realizes environmentally stable electron doping in quantum dots by controlling the size of the quantum dots, uses the doped quantum dots as the gain medium of the laser, and further realizes a low gain threshold, a low laser threshold, sustainable continuous laser output, and a designable output wavelength.

The application provides a bimetallic sulfide modified cadmium selenide photocatalyst and a preparation method and application thereof, and belongs to the technical field of photocatalytic hydrogen production. The application prepares cadmium selenide / copper molybdenum sulfide by hydrothermal reaction of copper molybdenum sulfide and cadmium selenide. The application successfully prepares cadmium selenide / copper molybdenum sulfide (CdSe / Cu2MoS4) with high purity and good crystallization by adopting a solvothermal synthesis method (hydrothermal reaction); the cadmium selenide (CdSe) is successfully modified by a method of constructing a heterojunction, and the photocatalytic hydrogen production performance is greatly improved, a new path is provided for modifying existing photocatalysts, and new impetus is injected into the development of photocatalytic hydrogen production technology.

The invention relates to the technical field of biological medicines, and particularly provides a preparation method of chiral cadmium selenide quantum dots and application of the chiral cadmium selenide quantum dots in retinal degeneration. The chiral cadmium selenide quantum dot with high efficiency is successfully synthesized by accurately controlling reaction conditions. The chiral cadmium selenide quantum dot has a remarkable protection effect on retinal injury caused by intraocular hypertension or oxidative stress, and can effectively improve the survival rate of retinal ganglion cells and relieve pathological changes of retina. In a rat model, a local point-to-eye administration mode shows a good treatment effect and biological safety. The invention provides a new thought and means for treatment of retinal degeneration, and has a wide clinical application prospect. In addition, the preparation method of the quantum dot and the compound thereof is simple and convenient, the cost is relatively low, and a new possibility is provided for expanding the application of the quantum dot in the field of biomedicine.

The invention discloses preparation and application of a cadmium selenide quantum dot / graphene sensitized titanium dioxide nanorod photo-anode. The method comprises the following steps: preparing a cadmium selenide quantum dot solution; preparing PDDA modified graphene; preparing a cadmium selenide quantum dot and graphene composite material; preparing a titanium dioxide nanorod growing on the FTO conductive glass; preparing a cadmium selenide quantum dot and graphene composite material sensitized titanium dioxide nanorod photo-anode; the preparation method is simple and feasible, and the raw materials are economical; the prepared cadmium selenide quantum dot / graphene sensitized titanium dioxide nanorod photo-anode has good visible light response capability, and when the cadmium selenide quantum dot / graphene sensitized titanium dioxide nanorod photo-anode is applied to a photocatalytic fuel cell, the power density of 187.65 mu w / cm < 2 > can be reached, so that the cadmium selenide quantum dot / graphene sensitized titanium dioxide nanorod photo-anode has a good market application prospect.

The present invention discloses a photoelectrochemical biosensor for detecting Cyfra21-1 and its preparation method. The biosensor comprises a titanium carbide / graphite-like carbon nitride / cadmium selenide quantum dot nanocomposite fixed to the surface of an FTO glass electrode. A probe sequence is fixed to the surface of the nanocomposite. The probe sequence partially binds to a single-stranded nucleic acid sequence, which is connected to a signal amplification factor via its terminal modification group. The present invention achieves detection of Cyfra21-1 using a photoelectrochemical biosensor, which is simple, highly sensitive, and easy to operate.

The invention relates to a preparation method of a halogen-doped window layer and a cadmium telluride solar cell. The preparation method comprises the following steps: obtaining a powder mixture composed of cadmium halide powder and cadmium selenide powder; under the protection of nitrogen, the obtained powder mixture is put into a mold, then the mold is put into a hot pressing furnace, the hot pressing furnace is vacuumized, the air pressure in the hot pressing furnace is smaller than 0.01 Pa, inert gas is introduced for gas replacement, after gas replacement is completed, the hot pressing furnace is heated to 300-1200 DEG C at the speed of 5-15 DEG C / min, then the hot pressing furnace is pressurized, and the hot pressing furnace is cooled to the room temperature; when the air pressure in the hot pressing furnace reaches 40-100 MPa, preserving heat for 50-150 minutes under the pressure, cooling and reducing the pressure to room temperature and normal pressure, and taking out the mold from the hot pressing furnace to obtain a halogen-doped window layer material; sputtering or depositing a halogen-doped window layer material on the high-resistance buffer layer through a magnetron sputtering method or a near-space sublimation deposition method to obtain a window layer; the open-circuit voltage of the cell can be improved, and the photoelectric conversion efficiency of a cell device is effectively improved.

A cadmium selenide quantum dot and titanium dioxide nanotube complex, a preparation method and its application in electrochemiluminescence chiral recognition, belonging to the field of nanomaterial preparation and molecular recognition technology. The preparation method is: using 3-mercaptopropionic acid as a stabilizing ligand to synthesize water-soluble cadmium selenide quantum dots, subjecting the cadmium selenide quantum dots to an amidation reaction with amino-modified titanium dioxide nanotubes to obtain a cadmium selenide quantum dot and titanium dioxide nanotube complex, which effectively improves the electrochemiluminescence performance. D-amino acid oxidase can be used to selectively catalyze D-amino acids to produce hydrogen peroxide, and hydrogen peroxide can be used as a co-reactant for the electrochemiluminescence of the cadmium selenide quantum dot / titanium dioxide nanotube complex, which can significantly enhance the electrochemiluminescence intensity of the system, thereby realizing the recognition of amino acid enantiomers. It can realize the selective recognition of multiple amino acid enantiomers and has good universality.

The present invention is related to a light emission or a luminescent material and applications thereof. The said material comprises a spherical core, a spherical shell deposited at outer surface of the spherical core, and further a rod shell deposited at outer surface of the spherical shell. The said spherical core comprises Indium phosphide particle with substantially spherical appearance or condition. The said spherical shell comprises Cadmium selenium deposited at outer surface of the spherical core with corresponded spherical appearance or condition. The rod shell comprises cadmium sulfide deposited at outer surface of the spherical shell with its structure extended in lengthwise longer than crosswise to a rod appearance or condition. The luminescent material provided by the present invention has a Type II NCs structure using cadmium selenium as the spherical shell to emit near-infrared light. The present invention provides InP / CdS / CeSe in core / shell / shell structure as luminescent material which has extra-broadband VIS-NIR emitting abilities.

The invention relates to the technical field of food detection, in particular to a method for detecting the peroxide value in animal fat based on quantum dot fluorescence, which comprises the following steps: dissolving animal fat to be detected with an organic solvent to obtain a clear solution; the cadmium selenide quantum dot fluorescent probe with high quantum yield is prepared by heating and refluxing a sulfenyl compound, a cadmium source and a selenium source in a water phase according to a specific ratio. Mixing a quantitative probe and a hydrogen peroxide standard solution with known concentration in a buffer solution to form a gradient solution, measuring the initial fluorescence intensity under a specific excitation wavelength, and measuring the intensity after reaction after a preset temperature duration reaction; calculating the intensity difference value of each concentration point, drawing a standard curve fitting equation by taking the difference value as a longitudinal axis and the concentration as a transverse axis, and obtaining the peroxide value of the sample based on the equation. According to the method, rapid and accurate detection of the peroxide value of the animal fat is realized through water-phase synthesis of a high-activity probe and quantification of fluorescence intensity difference before and after reaction.

The present invention discloses a method for preparing highly luminescent cadmium selenide quantum dots without water and oxygen isolation, comprising: step S1, precursor preparation; step S2: synthesizing quantum dots; step S3, sample purification; step S4, ligand exchange preparation of products. In the present invention, since there is no need to prepare a shell structure, the problems of complex operation, high cost, low efficiency, poor repeatability, etc. of traditional quantum dot synthesis are further avoided, and the surface properties of the material are more controllable, which is conducive to further surface chemical regulation and is used in the fields of optoelectronic display, photovoltaics, fluorescence sensing, etc.

A method of generating hydrogen gas including applying a potential of greater than 0 to 1.0 volts (V) to an electrochemical cell. The electrochemical cell is at least partially submerged in an aqueous solution. On applying the potential the aqueous solution is reduced thereby forming hydrogen gas. The electrochemical cell includes an electrocatalyst and a counter electrode. The electrocatalyst includes a substrate, strontium titanate (SrTiO3) nanoparticles, and cadmium selenide (CdSe) nanoparticles. The SrTiO3 nanoparticles have a substantially spherical shape. The CdSe nanoparticles have a polygon shape. The CdSe nanoparticles are distributed within a network of the SrTiO3 nanoparticles on the surface of the substrate.

The invention relates to a slurry for compounding graphene on the surface of a cutter and a preparation method, and the slurry comprises the following components in percentage by weight: 40-60% of water-based hydroxy acrylic acid-polyurethane hybrid emulsion, 0.5-2% of hydroxylated few-layer graphene, 0.1-0.3% of cadmium selenide / zinc sulfide core-shell structure quantum dots (surface carboxylation), 5-15% of plasma microcapsules and the balance of water. The water-based polyurethane adhesive is prepared from the following components in percentage by weight: 2 to 4 percent of water-based aliphatic polyisocyanate, 0.2 to 0.3 percent of polyvinylpyrrolidone, 0.2 to 0.3 percent of sodium carboxymethyl cellulose and 0.1 to 0.3 percent of high-molecular-weight ammonium polyacrylate. Before use, the water-based aliphatic polyisocyanate is added and defoamed, and the water-based aliphatic polyisocyanate is applied to the surface of a cutter by silk-screen printing or spraying. The invention is suitable for the coating-curing technology of the surfaces of metal, ceramic and superhard cutters, the film-substrate adhesion fastness reaches 0 level in (GB / T 9286), and the friction coefficient is less than or equal to 0.12.

The invention provides a bimetallic sulfide modified cadmium selenide photocatalyst as well as a preparation method and application thereof, and belongs to the technical field of photocatalytic hydrogen production. The cadmium selenide / copper molybdenum sulfide is prepared by hydrothermal reaction of copper molybdenum sulfide and cadmium selenide. According to the invention, cadmium selenide / copper molybdenum sulfide (CdSe / Cu2MoS4) with high purity and good crystallization is successfully prepared by adopting a solvothermal synthesis method (hydrothermal reaction); cadmium selenide (CdSe) is successfully modified through a heterojunction construction method, the photocatalytic hydrogen production performance of the cadmium selenide is greatly improved, a new path is provided for modification of an existing photocatalyst, and new power is injected for development of a photocatalytic hydrogen production technology.

The present invention belongs to the technical field of semiconductor thin film annealing treatment, and discloses a method for improving the quality of cadmium selenide thin film by annealing after hot pressing. This method takes the cadmium selenide thin film as the treatment object, directly adheres the cadmium selenide thin film to a heat-conducting substrate in an atmosphere environment of a protective gas, applies pressure to the cadmium selenide thin film at the same time, and performs heating annealing under the condition of maintaining the pressure; the annealed cadmium selenide thin film obtained thereby has larger grain size and smaller film porosity compared with the cadmium selenide thin film before treatment. By applying additional pressure to the thin film during annealing and cooperating with heating to perform post-treatment on the cadmium selenide thin film, the present invention can improve the problems of porosity and high roughness of the current cadmium selenide thin film.

The application discloses a modified manganese iron lithium phosphate positive electrode material, a positive electrode sheet, a battery and a preparation method. The modified manganese iron lithium phosphate positive electrode material comprises a manganese iron lithium phosphate base body, a carbon coating layer coated on the surface of the manganese iron lithium phosphate base body and a selenide coating layer coated on the surface of the carbon coating layer. The selenide is selected from a mixture of one or more of copper selenide, cadmium selenide, indium selenide, lead selenide and antimony selenide. The problems of low conductivity, low discharge capacity, poor rate performance, poor cycle retention rate and high manganese dissolution rate of the existing manganese iron lithium phosphate positive electrode material are solved.

This invention belongs to the field of fluorescent probe preparation technology, specifically a method for preparing and applying a water-soluble quantum sheet fluorescent probe, comprising the following steps: Step 1: Disperse purified cadmium selenide quantum sheets in a hexane solution, add cadmium octanoate, and shake in a centrifuge tube for 10 min to obtain quantum sheets with cadmium octanoate as the surface; Step 2: Centrifuge the cadmium octanoate-surfaced quantum sheets at 6000 r / min for 3 min, and discard the supernatant; Step 3: Add a hexane solution, repeat steps 1 and 2, and place the obtained precipitate in an oven to dry at 40℃; Step 4: Add 1 mL of a 1% amphiphilic aqueous solution to the dried precipitate, and sonicate for 15 min to obtain a uniformly dispersed quantum sheet aqueous solution; This invention is water-soluble and can be directly synthesized in water, which is more conducive to practical applications. Furthermore, by adding ligands, the water-soluble quantum sheets of this invention can maintain fluorescence characteristics for about one month.

This invention relates to the field of biomedical technology, specifically proposing a method for preparing chiral cadmium selenide quantum dots and their application in retinal degeneration. By precisely controlling the reaction conditions, highly efficient chiral cadmium selenide quantum dots were successfully synthesized. The chiral cadmium selenide quantum dots of this invention exhibit significant protective effects against retinal damage caused by high intraocular pressure or oxidative stress, effectively improving the survival rate of retinal ganglion cells and alleviating retinal pathological changes. In a rat model, topical ocular administration demonstrated good therapeutic efficacy and biosafety. This invention provides new ideas and methods for the treatment of retinal degeneration and has broad clinical application prospects. Furthermore, the preparation method of these quantum dots and their complexes is simple and low-cost, providing new possibilities for expanding the application of quantum dots in the biomedical field.

This invention relates to the preparation and application of a carbon quantum dot-modified zinc cadmium selenide (ZNDS) sulfide with an embedded dual-field superhydrophilic photocatalyst for hydrogen production via water splitting, belonging to the field of photocatalytic hydrogen production technology. The invention uses citric acid and urea as raw materials to prepare hydrophilic carbon quantum dots via a hydrothermal method. Then, zinc acetate dihydrate, cadmium acetate dihydrate, thioacetamide, and a selenium powder-hydrazine hydrate solution are added to the carbon quantum dot system to achieve the preparation of an amide-bonded carbon quantum dot-modified ZNDS sulfide with an embedded dual-field superhydrophilic photocatalyst via a one-step hydrothermal method. The invention also discloses the application of this photocatalyst in hydrogen production via water splitting. Under the synergistic effect of multiple charge transport channels and photocatalysis-thermal catalysis, the photocatalyst significantly improves the directional separation and migration efficiency of photogenerated carriers, achieving a hydrogen production rate of 103.9~126.8 mmol·g under light-driven and thermally assisted conditions. cat ‑1 ·h ‑1 Furthermore, after eight consecutive uses, the photocatalytic activity remained above 91%. Therefore, the prepared photocatalyst has enormous potential for photocatalytic hydrogen production applications.