523 results about "Cadmium sulphide" patented technology

The invention discloses a g-C3N4 nanosheet / CdS composite visible-light-driven photocatalyst and a preparing method and application thereof and belongs to the technical field of material preparation and photocatalysis. The catalyst is directly obtained with the solvothermal method by taking two-dimensional ultra-thin g-C3N4 nanosheets as the matrix, cadmium acetate dihydrate and thioacetamide as raw materials, and ethyl alcohol as the solvent. Compared with general block g-C3N4 / CdS, the two-dimensional ultra-thin g-C3N4 nanosheet / CdS composite photocatalyst prepared with the method has the advantages that the two substances are in tighter contact, the specific surface area is larger, photon-generated electron-hole can be better separated, and photocatalytic efficiency is higher. Under the shining of sunlight, the composite photocatalyst enables catalytic degradation of organic pollutants such as methyl orange in water to be achieved well. The preparing method is easy, raw materials are easy to obtain, visible light catalysis efficiency is high, and the application prospect is wide in the photocatalysis field.

The invention provides a preparation method of an active radical with a surface-enhanced Raman scattering (SERS) effect, belongs to the technical field of spectrum detection, and relates to the preparation technology of the SERS active radical, which is rapid, has high sensitivity and performs a low trace detection function. The preparation method is characterized in that firstly, a nano porous silicon columnar array with a large specific surface area is prepared by utilizing a hydrothermal etching technology; afterwards, a nanowire structure of an II-VI group compound semiconductor (such as zinc oxide, titanium dioxide, cadmium sulfide, cadmium selenide, cadmium telluride, and the like) by utilizing a chemical vapor deposition method; and finally, nano particles of precious metal (such as gold, silver, copper and the like) are finally prepared on the nanowire structure by using a chemical reduction method, so as to obtain an active radical material. The preparation method has a wide application prospect in the aspects of clinical biomolecular fast recognition, trace chemical substance detection, biological sample analysis, and the like. The preparation method has the advantages that the preparation process of each material is simple, the condition is mild and the repetition rate reaches 100 percent.

A MOS or CMOS sensor for high performance imaging in broad spectral ranges including portions of the infrared spectral band. These broad spectral ranges may also include portions or all of the visible spectrum, therefore the sensor has both daylight and night vision capabilities. The sensor includes a continuous multi-layer photodiode structure on a many pixel MOS or CMOS readout array where the photodiode structure is chosen to include responses in the near infrared spectral ranges. A preferred embodiment incorporates a microcrystalline copper indium diselenide / cadmium sulfide photodiode structure on a CMOS readout array. An alternate preferred embodiment incorporates a microcrystalline silicon germanium photodiode structure on a CMOS readout array. Each of these embodiments provides night vision with image performance that greatly surpasses the GEN III night vision technology in terms of enhanced sensitivity, pixel size and pixel count. Further advantages of the invention include low electrical bias voltages, low power consumption, compact packaging, and radiation hardness. In special preferred embodiments CMOS stitching technology is used to provide multi-million pixel focal plane array sensors. One embodiments of the invention made without stitching is a two-million pixel sensor. Other preferred embodiments available using stitching techniques include sensors with 250 million (or more) pixels fabricated on a single wafer. A particular application of these very high pixel count sensors is as a focal plane array for a rapid beam steering telescope in a low earth orbit satellite useful for tracking over a 1500-meter wide track with a resolution of 0.3 meter.

The invention discloses a composite photo-catalyst with a molybdenum disulfide (MoS2) nanosheet / cadmium sulfide (CdS) nanowire core-shell structure, and a preparation method of the composite photo-catalyst, belonging to the technical fields of material preparation and photo-catalysis. The composite photo-catalyst takes a one-dimensional CdS nanowire as a core and takes a two-dimensional MoS2 nanosheet as a shell, and is compounded by an electrostatic self-assembly method through a hydrothermal process. The raw materials of the composite photo-catalyst can be easily obtained, and the preparation method is simple in process and convenient to operate; the prepared composite material with the core-shell structure is better in stability, has excellent photocatalytic activity and can be used for catalyzing photolysis of water for preparing hydrogen; furthermore, the core-shell structure is capable of effectively preventing the sulfur loss of the CdS nanowire and slowing down photocorrosion, and has wide application prospect in the field of photo-catalysis.

The invention relates to a method for detection Listeria monocytogenes with loop-mediated isothermal amplification-CdS nanoparticles labeling electrochemistry. The method is characterized in that the method comprises the following steps of: obtaining double-stranded target sequence of amplification reagent-Listeria monocytogenes to be detected by means of loop-mediated isothermal amplification reaction; pyrolyzing a double-stranded target sequence in water bath into a single-stranded target sequence, then self assembling and fixing at the surface of gold electrode, so that the target sequence modified electrode of the Listeria monocytogenes to be detected is obtained; afterwards, labeling the probe sequence coming from the Listeria monocytogenes by CdS nanoparticles to obtain a labeled probe sequence; carrying out molecular hybridization on the labeled probe sequence and the target sequence of the target sequence modified electrode, and carrying out electrochemical detection by simultaneity plating Hg anodic stripping method; detecting out cadmium ions corresponding to the species-specific genes (actA) of the detected Listeria monocytogenes. The method has the advantages of speediness, strong specificity, high sensitivity and convenient use.

The invention discloses a preparation method and application of a cadmium sulfide / graphite like carbon nitride (CdS / g-C3N4) composite visible light catalyst. The preparation method of the catalyst is a chemical precipitation method which is performed in an alkaline environment, wherein g-C3N4 is taken as a matrix, and CdCl2 and Na2S are taken as raw materials. The weight ratio of CdS to g-C3N4 in CdS / g-C3N4 is (1:2)-(5:1), and when the composite visible light catalyst is used for visible light catalysis treatment of methylene blue and methyl violet solutions, a better degradation effect can be obtained; and furthermore, the catalyst can still keep higher catalytic activity after being reused for five times. The composite visible light catalyst disclosed by the invention has important significance for development of the visible light catalyst, and also has good application prospects in treatment of dye wastewater.

The invention provides photocatalyst Cd / CdS containing catalyst promoter Cd, which is obtained by uniformly attaching single-substance metal Cd on the surface of CdS, and belongs to the technical field of photocatalysis. The metal single-substance Cd in cadmium sulfide CdS is the catalyst promoter, so that photo-generated electrons and electron-hole pairs can be effectively separated, the photocatalysis hydrogen production efficiency of the CdS is greatly improved, and the application of the CdS in photocatalysis water decomposition hydrogen production reaction is expanded; efficient photocatalyst Cd / CdS is directly synthesized by adopting a photochemical method, so that the structure and the performances are relatively stable, and the efficient photocatalyst Cd / CdS can be recycled in the photocatalysis water decomposition hydrogen production reaction. Besides, the synthetic method of the photocatalyst Cd / CdS is simple, lower in cost, high in yield and good in industrial prospect.

The invention discloses a preparation method of a semiconductor nano-wire-based organic / inorganic composite solar cell, belonging to the technical field of new energy resources. The method is characterized by comprising the following steps: preparing nano silicon with good light absorption performance in a visible light area by an electrochemical corrosion or hydrothermal corrosion technology; growing a zinc oxide or titanium dioxide or cadmium selenide nano-wire array on the nano silicon substrate by a high-temperature chemical vapor deposition method or low-temperature liquid phase chemical method; spinning poly-3-hexylthiophene (P3HT) or poly[2-methoxy-5-(2-ethyhexyloxy)-1,4-p-phenylene vinylene] (MEH-PPV) or poly(3-octylthiophene) (P3OT) on the nano-wire array to form a three-layer composite structure system; and finally preparing a magnesium fluoride or calcium fluoride surface anti-reflection film and metal film electrode to form a solar cell device. The process disclosed by the invention is simple, the operation is simply and easily implemented, the preparation conditions are mild, the repetition rate reaches 100%, and the prepared organic / inorganic composite material system is an important material for manufacturing a full-silicon-based solar cell device in the future.

A photovoltaic device is presented. The photovoltaic device includes a layer stack; and an absorber layer is disposed on the layer stack. The absorber layer comprises selenium, wherein an atomic concentration of selenium varies across a thickness of the absorber layer. The photovoltaic device is substantially free of a cadmium sulfide layer.

The invention discloses a perform-optimized cadmium telluride thin-film battery and a manufacturing method for the cadmium telluride thin-film battery, wherein the cadmium telluride thin-film battery comprises a substrate and an epitaxy lamination layer; the epitaxy layer lamination sequentially consists of a conducting layer, a window layer, a light-absorbing layer, a back barrier layer and a back electrode from the bottom up; the window layer is of a textured cadmium sulfide thin-film layer; the light-absorbing layer is of a cadmium telluride thin-film layer, the back barrier layer is of a zinc telluride / copper-doped zinc telluride composite layer or a mercury telluride / copper-doped mercury telluride composite thin-film layer, and the back electrode is of one or more of graphite slurry or graphene slurry thin-film layer or copper thin-film layer, nickel thin-film layer, copper-nickel alloy thin-film layer and molybdenum thin-film layer. According to the cadmium telluride thin-film battery provided by the invention, the window area is textured and an optical path of a light-transmitting area is reduced, and thus a light-absorbing capacity is further improved and the better light-trapping effect is realized.

The invention relates to a preparation method for a metal organic framework material UIO-66 (NH2) doped rodlike cadmium sulfide (CdS NRs) composite photocatalyst. The preparation method comprises thefollowing steps: preparation of rodlike cadmium sulfide (CdS NRs), preparation of UIO-66 (NH2) and preparation of a UIO-66 (NH2) doped rodlike cadmium sulfide (CdS@UIO-66 (NH2)) composite photocatalyst. The invention has the following beneficial effects: the preparation method is simple; preparation conditions are easily controllable; and the UIO-66 (NH2) doped rodlike cadmium sulfide (CdS NRs) composite catalyst prepared by using the preparation method provided by the invention has the advantages of no secondary pollution, high photocatalytic efficiency, certain application values, etc.

The invention relates to solar energy absorption coating for flat plates. The solar energy absorption coating is formed by acrylic resin and is used for forming a thin film. An absorbent is prepared by using organic carbon black, titanium dioxide, manganese dioxide powder, ferric oxide powder, chromic oxide powder, cadmium sulfide selenide powder and copper oxide powder; ethyl alcohol, acetone or cyclohexanone is used as a solvent; the performances of the coating are improved by adding a plasticizer, an inhibitor, an anti-settling agent, a lubricating agent and a dispersing agent. A preparation technology of the solar energy absorption coating is simple; the solar energy absorption coating has relatively high solar energy absorption efficiency and relatively good waterproof and anti-ageing performances; the solar energy absorption coating with different colors can be selected so as to meet the decoration requirements of different requirements.

The invention relates to a preparation method of an aptamer photoelectrochemical sensor for high-sensitivity high-selectivity detection of MC-LR. The preparation method comprises preparing titanium dioxide nanotubes on a titanium matrix by an anodization method, carrying out modification with cadmium sulfide nanoparticles, functionally assembling chitosan and glutaraldehyde to the surface of an electrode so that a photoelectric biological interface is built, and bonding a MC-LR aptamer with a specific base sequence to the surface of the base electrode by chemical bonding so that the MC-LR aptamer photoelectrochemical sensor is prepared. Through combination of a supersensitive photoelectric analysis technology and an aptamer technology with a MC-LR specific recognition function, the preparation method realizes high-sensitivity high-selectivity analysis detection of MC-LR, and has the MC-LR detection limit of 5.3*10<-12> mol / L and a linear detection range of 7.2*10<-8> to 8*10<-12> mol / L. Compared with the prior art, the preparation method has the advantages of simple processes, fast response and low cost and can realize high-sensitivity high-selectivity analysis of MC-LR.

A method of preparing a three-dimensional composite material includes the following steps: preparing polystyrene by soap-free emulsion polymerizing, obtaining polystyrene opal by a vertical deposition method, synthesizing MoP IO (molybdenum phosphide inverse opal), and compounding with quantum points CdS, so as to obtain a novel inorganic composite material, namely cadmium sulfide quantum dot-compounded MoP IO. The preparation method has the advantages that the MoP IO is prepared first, and the MoP IO is of a three-dimensional cyclic pore structure and has the photonic band gap feature, so that the MoP IO has better catalysis effect in light catalysis in comparison with that of common porous material; the MoP IO is compounded with the cadmium sulfide quantum dots, so that the light absorbing ability is enhanced, and the composite material capable of absorbing the visible light is obtained.

The invention discloses a preparation method for a cadmium sulfide / graphene composite material. The preparation method comprises the steps of (1) adding cadmium sulfide and thiourea into deionized water, and stirring to obtain a clarified solution A; (2) adding oxidized graphene into the solution A, performing ultrasonic dispersion until the oxidized graphene is uniformly dispersed, heating to evaporate the mixture until the mixture is colloid, continuing to heat and combust the mixture to discharge a large amount of gas, wherein the obtained product is the cadmium sulfide / graphene composite material. According to the preparation method disclosed by the invention, the required temperature is low, the process is simple, the operation is easy, the yield is high, and preparation method can be used for large-batch production. The composite material prepared by the method has excellent photocatalysis performance.

The invention discloses a method and a device for preparing a cadmium selenide sulfide nano material with monotonous and continuous variable band gap. According to the preparation method, based on a vapor deposition method, the positions of a cadmium sulfide quartz boat and a cadmium selenide quartz boat in a tubular high-temperature furnace are adjusted through a magnet to continuously adjust the vapor concentration ratio of cadmium sulfide to cadmium selenide during growing the nano material so as to realize monotonous continuous transition of the band gap on the same nano band or nano wire. The preparation method is simple and low in cost; the ratio of sulfur element to selenium element on the prepared single nano material can be continuously transited to 0: 1 from 1: 0; and the nano material has potential application value in the fields of tunable lasers, wideband lasers, white light LEDs, wide spectrum detectors and the like.

The invention discloses a copper zinc tin sulfur compound thin-film solar cell and a preparation method of the copper zinc tin sulfur compound thin-film solar cell, wherein the thin-film solar cell comprises a glass substrate, a metal back electrode layer, a P-type absorption layer, an n-type cadmium sulfide buffer layer, a transparent oxide thin-film window layer and a TCO top electrode; the preparation method of the P-type copper zinc tin sulfur absorption layer comprises the following steps: adopting single-target pulsed laser deposition technology, and synthesizing through one-step technology without subsequent heat treatment process. According to the invention, the solar cell has the advantages of enough and non-toxic sources for the contained elements, environmental protection, high photoelectric conversion rate, good stability, simple structure, simple preparation technology and low cost.

In the method, two phases system is formed under following condition: cadmium alkyl carboxylic acid containing 2-18 carbon or cadmium oxide as cadmium source; thiourea or thioacetamide as sulphur source; oleic acid or three octyl phosphine oxide (TOPO) as package agent; water in equivolume and organic compound not dissolved in water as solvent; heating 0.5-24 hours inside autoclave under 120-180 deg.C. Quantum points of cadmium sulphide in different sizes are obtained by changing reaction time. Or, quantum point near to size distribution of crystal seed in larger size is obtained by using obtained quantum point as crystal seed through reaction with new added reactive precursor. The invention realizes controllable size of quantum point, obtains quantum points in narrow distributed sizes. Light in royal purple or blue color is radiated under ultraviolet lamp. quantum efficiency is 3-60%.

The invention relates to a preparation method of a photoelectrochemical sensor for detecting dexamethasone based on in-situ generation of cadmium sulfide. The method specifically comprises the following steps: as carboxylated carbon nitride and bismuth sulfide are taken as substrate materials, and labeling a dexamethasone antibody by using titanium dioxide subjected to cadmium ion functionalization. Sodium sulfide is directly dropwise added to the electrode surface, a narrow band-gap cadmium sulfide semiconductor nanometer material with the high photoelectric conversion efficiency is generated in situ, and a photocurrent signal is generated under light source irradiation with visible wavelength. A porous titanium dioxide carrier and a cadmium sulfide energy band are well matched, so that the photoelectric conversion efficiency of the cadmium sulfide is improved, the high-sensitivity detection of dexamethasone is realized, and the detection limit is 2pg / mL.

Chemical bath deposition (CBD) has proved top be the most favorable method for application of a buffer layer to semiconductor substrates, for example, chalcopyrite thin-film solar cells, whereby previously cadmium sulphide (CdS) was deposited and as cadmium is a highly toxic heavy metal, alternatives have been required. According to the invention, the semiconductor substrate is dipped in a solution for approximately 10 minutes, produced by the dissolution of zinc sulphate (0.05-0.5 mol / l) and thiourea (0.2 to 1.5 mol / l) in distilled water at a temperature being held essentially constant throughout said period. For the first time, the ZnS layer permits comparable or higher efficiencies than conventionally only achieved with toxic cadmium compounds. The method is hence much more environmentally-friendly with the same result.

The invention provides a preparation method for a titanium dioxide@graphene-cadmium sulfide ternary compound optical catalyst. The preparation method comprises: synthesizing titanium dioxide@graphene-cadmium sulfide in situ by virtue of a hydrothermal method including firstly inducing graphene to wrap titanium dioxide microspheres; and meanwhile, loading cadmium sulfide quantum dots on graphene nanosheets to form a ternary compound structure. Titanium dioxide and graphene are together used as an electron acceptor and a transfer of cadmium sulfide, so that the electron-hole separation time of cadmium sulfide is prolonged, and the purpose of enhancing the optical catalytic performance of the material is achieved. The method provided by the invention is simple to operate, short in synthetic period and easy to control. No additional noble metals are added as a co-catalyst, and the hydrogen production rate of the material can reach 715 [mu]mol / g / h. The optical catalyst prepared by the method provided by the invention can be repeatedly used.

The invention provides a ferroferric oxide / carbon / cadmium sulfide composite nano material and a preparation method thereof. The preparation method comprises the following steps: firstly, synthesizing one-pack-one Fe3O4@C nano particles with good monodispersity by using a hydrothermal process, wherein the 'one-pack-one' means that one Fe3O4@C nano particle is only wrapped in one carbon layer; then obtaining Fe3O4@C@Cd<2+> by means of simple adsorption; and finally forming Fe3O4@C@CdS nano particles by adopting a microwave method. Compared with the prior art, the preparation method provided by the invention is simple in process and easy to operate; the prepared material has the characteristics of proper size, uniform structure, relatively strong magnetism and good photocatalysis effect; the material has a uniform spherical core-shell structure, is relatively good in dispersity in a solution, can perform a photocatalysis action under the irradiation of visible light; and because the composite nano material has magnetism, the composite nano material can be recycled for multiple times by using a magnet.

The invention discloses a method for growing a CdS nano rod of II-VI semiconductor compound by vacuum and thermal evaporation and assistance by catalysts, and is realized by the following processes: CdS powder and metal Bi powder are mixed evenly as per the proportion of mol ratio of 1 : 0.01 - 1 : 0.35 for preparing the raw material, placed in a resistance heating boat made of molybdenum sheets, and various substrates are placed 3 mm - 3 cm over the boat. After the cavity of the vacuum evaporation furnace of the evaporation sedimentation system which is placed internally reaches the vacuum environment of 2*10<-2>-2*10<-3>Pa, the evaporation furnace is sealed, 100-180A of current is led to the resistance heating boat for 5-15 minutes and then evaporation and sedimentation are proceeded. The nano rod of cadmium sulphide prepared by the invention is crystal-stated hexagonal-phase-structured CdS. The nano bod of cadmium sulphide of the invention is characterized by being applicable to various substrates, large segment area and even feature; and the method of the invention is simple, can be promoted easily and is applicable to a large scale of industrial production.

A photocatalyst Pt-carried CdS / Ti-MCM-41 for generating H2 by optical catalytic reaction is prepared through providing CTAB as template agent, hydrothermal reaction to synthesize CTAB / Ti-MCM-41, ion exchange to obtain Cd / Ti-MCM-41, sulfurizing in HS gas to obtain CdS / Ti-MCM-41 and carrying Pt by optical reduction method. It has high H2 output rate.

The invention discloses a CD (carbon dot) / CdS quantum dot / C3N4 catalyst and a preparation method thereof. The catalyst is prepared from CDs synthesized with an electrochemical method, CdS quantum dotssynthesized with a solvothermal method and g-C3N4 (graphene-like carbon nitride) synthesized with a calcination method. Under the simulated sunlight, the catalyst can efficiently and stably promote photocatalytic decomposition of water to produce hydrogen and also can catalyze and oxidize organic pollutants such as p-nitrophenol and the like. The catalyst has the advantages as follows: 1, the photoresponse range of a heterojunction catalyst is broadened through loading of the CDs, and absorption under visible light is improved; 2, the light utilization rate is increased by use of the upconversion effect of the CDs and the electron conduction capability; 3, the CdS quantum dots have moderate forbidden bandwidth, more photon-generated carriers are produced, and besides, combination of photo-generated electrons and holes is inhibited and the light utilization rate can be increased by use of the ultrahigh electron conduction capability of the CdS quantum dots.

The invention relates to a preparation technology of a photocatalyst, and in particular relates to a preparation method of a photocatalyst taking silicon carbide as a carrier. The preparation method comprises the following steps of: (1) weighing the silicon carbide, adding a sulfourea solution into the weighed silicon carbide, evenly stirring, dripping a cadmium chloride solution into the mixture to obtain a mixed solution, adjusting the pH of the mixed solution to be 8-10 by an NaOH solution, and carrying out reflux at 100 DEG C for 8h-12h; (2) after reflux, respectively washing the sample by distilled water and ethyl alcohol, drying the sample for 3h-5h at 60 DEG C, and then drying the sample again to constant weight at 120 DEG C to obtain the photocatalyst taking the silicon carbide as the carrier, wherein the content of cadmium sulfide in the photocatalyst accounts for 9%-50% of the total weight of the photocatalyst. The photocatalyst prepared by the method is good in stability, has good thermal conductivity, can effectively transfer reaction heat in catalytic reaction, and has good mechanical strength and hardness and good thermal conductivity and electrical conductivity.

The invention discloses an efficient and stable silicon-based photocatalytic hydrogen evolution electrode, a preparation method and applications thereof, wherein the efficient and stable silicon-basedphotocatalytic hydrogen evolution electrode comprises a p-type silicon substrate, a cadmium sulfide heterojunction layer, a titanium oxide protection layer and a platinum co-catalyst. The preparationmethod mainly comprises four steps of silicon wafer substrate surface cleaning, cadmium sulfide layer deposition, titanium oxide layer deposition and platinum aid loading. According to the present invention, the preparation of silicon and cadmium sulfide heterojunction is effectively achieved, the photo-generated voltage is increased, the problem that the silicon-based photocathode is unstable inthe aqueous solution is solved, and the stability of the material is improved; and the preparation method has advantages of simple operation process, strong controllability, stable photoelectrocatalytic performance of the product, and good repeatability.

The invention discloses a titanium dioxide / cadmium sulfide / titanium dioxide composite film and an application thereof in the technical field of wastewater treatment. A preparation method of the composite material comprises the following steps: depositing titanium on a substrate by adopting a tilting growth method, thereby obtaining a nano bar array film with favorable discreteness; annealing the titanium film at the air condition of 450 DEG C for 2 hours, thereby obtaining a titanium dioxide nano bar array film; depositing cadmium sulfide nano particles on a titanium dioxide nano bar array by a continuous ion layer adsorption reaction method, thereby obtaining a titanium dioxide / cadmium sulfide composite film, wherein the film has a favorable organic wastewater processing effect under visible light; and depositing a layer of titanium dioxide on the film again on the titanium dioxide / cadmium sulfide composite film by an atomic layer deposition method. The visible light organic wastewater degrading efficiency of the titanium dioxide / cadmium sulfide / titanium dioxide structure is improved obviously compared with that of the titanium dioxide / cadmium sulfide. The processing method is simple, the visible catalytic performance of the composite film is obviously improved, and the composite film has a wide application prospect in wastewater treatment.

The invention disclosed a kind of sulfate cadmium bare quanta spot, which is granulo- nanometer crystal. The fluorescence emission peak lambadamax and peak width at half-height are 415-420nm and 80-100nm respectively. The water-heat synthetic process is also disclosed in the invention: making the water-soluble inorganic cadmium salt (the molar ratio of the cd / s is 1-1.2:1) and the L-aminothiopropionic acid react in the pH 9-13 reaction system. The method is simple, easy to operate and is characterized by low cost. The invention has produced Cds bare quanta spot in different particle diameters (<10 nm). Compared with the present products, the product in this invention has the advantage of high stability, good fluorescence emission peak shape, and narrow peak width at half-height and good monochromaticity. It not only saves time for the surface modification, but also increases its fluorescence efficiency so that it can be used to produce tissue labels after surface modifying.

The invention aims to the problems such as environment pollution and energy crisis at present, and discloses a simple and convenient preparation method of an irregular cobalt phosphide / cadmium sulfide nanorod composite catalyst, and aims to reduce the cost of photocatalysts and increase velocity of hydrogen production by photocatalysis decomposition of water. The preparation method of the composite catalyst is green and environmental-friendly, and the prepared composite catalyst is relatively long in service life, and still has relatively high catalysis activity even after 25 hours. The irregular cobalt phosphide / cadmium sulfide nanorod composite catalyst prepared by using the method is simple and convenient in synthesis method, high in photocatalysis hydrogen production velocity, high in stability and low in price, is capable of greatly reducing the cost when being applied to industrial production, and is a novel catalysis material with relatively large industrial photocatalysis hydrogen production prospects.