38 results about "Zinc cadmium sulfide" patented technology

A method for making a heterojunction photovoltaic device (200) is provided for converting solar radiation to photocurrent and photovoltage with improved efficiency. The method and apparatus include an improved window layer (230) having an increased oxygen (140) concentration with higher optical bandgap and photo to dark conductivity ratio. The improved photovoltaic device (200) is made using a deposition method which incorporates the use of a gas mixture of an inert gas (115) and a predetermined amount of oxygen (140), deposited at or near room temperature. Window layers contemplated by the present invention include, but are not limited to, cadmium sulfide (CdS) and various alloys of zinc cadmium sulfide (Zn_xCd_1-xS). To further increase the efficiency of the resultant photovoltaic device (200), deposition parameters are controlled and monitored to improve the deposited window layer (230).

The invention relates to a zinc-cadmium sulfide photocatalyst nanometer material with visible light response and a preparation method thereof, and belongs to the field of inorganic material preparation. The catalyst consists of zinc-cadmium sulfide, and has good visible light absorption performance and excellent activity of degrading organic pollutant by visible light. The photocatalyst and the method have the characteristics of low cost, simple preparation process and easy industrialized production.

The invention discloses a method and device for preparing zinc cadmium sulfide selenide nanowires with fluorescence changing from ultraviolet to red. The method is characterized by adopting high temperature to volatilize zinc sulfide in a zinc sulfide volatilization region and cadmium selenide in a cadmium selenide volatilization region, adopting a sedimentation method to grow zinc cadmium sulfide selenide nanowires on a growth carrier in a growth region in the environments of certain vacuum and airflow and ensuring the ratio of such components of the nanowires as the zinc sulfide and the cadmium selenide to continuously change from 1:0 to 0:1 through movement of the growth carrier in the growth region. The device comprises a high temperature furnace, a box body, a vacuum pump, a gas cylinder and a moving device, wherein a connecting lever suspending in the box body is arranged inside the box body; two containers are arranged on the connecting lever; a carrier platform installed on the box body is arranged at the same side of the two containers; and the moving device can be utilized to move the box body and the carrier platform at certain speed. The fluorescence spectra of the zinc cadmium sulfide selenide nanowires prepared by the method and device can continuously change from ultraviolet to red in a monotone manner.

The invention discloses a metal or metalloid modified zinc cadmium sulfide-ethylenediamine photocatalyst and a preparation method. The preparation method of the metal modified zinc cadmium sulfide-ethylenediamine photocatalyst comprises the following steps that (1) ZnxCd1-xS-ethylenediamine hybrid nanosheets are prepared; (2) metal ion modified ZnxCd1-xS-ethylenediamine hybrid nanosheets are prepared; and (3) the metal modified zinc cadmium sulfide-ethylenediamine photocatalyst is prepared. The method is simple in process, easy and convenient to operate and low in preparation cost, and the prepared metal or metalloid compound modified ZnxCd1-xS-ethylenediamine photocatalyst is highly dispersed in water and has high visible light catalysis water-splitting hydrogen production performance and good chemical stability.

The invention discloses a fluorescent material. The fluorescent material comprises, by weight, 25 to 35 parts of N-R substituent-p-nitroaniline, 10 to 15 parts of zinc metasilicate, 5 to 10 parts of zinc-cadmium sulfide, 3 to 9 parts of fluorescein, 2 to 5 parts of morin, 10 to 15 parts of a cyclic phenol compound, 3 to 9 parts of zirconia, 2 to 7 parts of alumina and 4 to 10 parts of garnet. The fluorescent material and other fluorescent materials can be combined and be manufactured into a white light luminescence device, or the fluorescent material can be individually used as security pattern fluorescent paint.

The invention relates to a preparation method of a zinc cadmium sulfide/bismuth oxybromide composite visible light catalyst. The method includes preparing zinc cadmium sulfide and a bismuth oxybromidephotocatalyst; and preparing the zinc cadmium sulfide/bismuth oxybromide composite photocatalyst. Beneficial effects of the method are that the method is simple, low in cost, and easy to operate; preparation conditions are easy to implement and control; and the prepared composite visible light catalyst is a green, pollution-free and high-performance catalyst, has high photocatalytic activity, short degradation time and good effects, and has a potential application prospect.

The invention relates to a preparation method of a nanogold copper quenching zinc-cadmium sulfide electrofluorescence insulin sensor, and belongs to the field of an electrofluorescence sensor. The electroluminescence spectrum of zinc-cadmium sulfide is well overlapped with the ultraviolet absorption atlas of nanogold copper; the nanogold copper can be used as a receptor to generate energy resonance transfer with the zinc-cadmium sulfide, so that the electrofluorescence response of the zinc-cadmium sulfide is quenched. Gold coats the zinc-cadmium sulfide/amino nitrogen doping mesoporous carbon Au@ZnxCd1-xS/NMC to be used as an insulin capture antibody substrate material. The nanogold copper AuCu is used as an insulin detection antibody immobilization material. Through zinc doping, the CdS electrofluorescence response can be improved; ZnxCd1-xS is used as an electrofluorescence signal source; the quenching effect of AuCu on Au@ZnxCd1-xS is used; the detection on insulin is realized according to different electrochemical luminous signal intensities of the insulin with different concentrations.

The invention provides a preparation method of a composite material for preparing hydrogen energy source by decomposition water under visible light. Through an one-step hydrothermal method, graphene is compounded with zinc indium sulfide mixed with rare-earth and zinc cadmium sulfide mixed with rare-earth; on the one hand, graphene structures a heterogeneous structure on the surface of a catalystsurface so as to improve the photocatalytic activity of a photocatalytic material; on the other hand, the graphene can be used as a transition body of electronic migration in the composite catalyst material under the irradiation of the visible light, thus separation between an electron and a hole is effectively reached, and the compounding of a photon-generated carrier is stopped; thus hydrogen production can be stabilized under the effect of the visible light; moreover, the composite material of the zinc indium sulfide mixed with rare-earth and graphene and the composite material of the zinccadmium sulfide mixed with rare-earth and the graphene are further compounded; the photocatalysis hydrogen production activity of the material is further promoted, and the requirement of the photocatalytic water splitting hydrogen production material responded to the visible light in the photocatalysis field can be satisfied.

The invention belongs to the technical field of photocatalytic hydrogen production, and particularly relates to a zinc cadmium sulfide nanorod and nickel nanorod heterojunction hydrogen production photocatalyst, a preparation method thereof, a hydrogen production system and a hydrogen production method. The method comprises the following steps: 1) mixing a zinc salt, a cadmium salt, ethanolamine, cysteine and a urea aqueous solution at room temperature, then carrying out a hydrothermal reaction, and separating the obtained solid product to obtain a zinc cadmium sulfide nanorod; and 2) dispersing the zinc cadmium sulfide nanorod obtained in the step 1) in an aqueous solution of polyethylene glycol and nickel sulfate, then adding urea and hydrazine hydrate, and then carrying out hydrothermal reaction to obtain the zinc cadmium sulfide nanorod and metal nickel nanorod heterojunction hydrogen production photocatalyst. According to the scheme, the semiconductor photocatalyst and the hydrogen production promoter are organically combined into a heterojunction material, and the efficient hydrogen production photocatalyst is formed.

The invention discloses a photocatalyst for directly producing hydrogen from dye wastewater, namely B-ZCSv/Cd with B doping, S vacancy and Schottky junction and a preparation method of the B-ZCSv/Cd. The photocatalyst is obtained by treating zinc cadmium sulfide with NaBH4 in an inert atmosphere. The method for preparing the catalyst is simple and easy to implement and environment-friendly. When being used as a water photolysis catalyst, the photocatalyst has relatively high activity; when hydrogen is produced in dye wastewater, the activity is further improved, and meanwhile, dye degradation is realized.

The invention provides a new material for preparing clean hydrogen energy and a preparation method of the new material. The new material is prepared from Zn(Ac)2.2H2O, In(NO3)3, Cd(Ac)2.2H2O, rare earth compounds, a graphene oxide solution and thioacetamide, wherein the new material is formed by stacking irregular particles, the size of the particles is 10-30 nm, and the specific surface area is 400-600 m<2>/g. According to the preparation method, by adopting a one-step hydrothermal method to compound graphene, zinc-indium sulfide doped with rare earth elements and zinc-cadmium sulfide doped with rare earth elements, on the one hand, the photocatalytic activity of a photocatalytic material can be improved by utilizing graphene to construct a heterojunction structure on the surface of the catalytic material, on the other hand, under the radiation of visible light, graphene can be used as a transitional body of electron transfer in the composite catalytic material, so that the separationof electron and cavities can be achieved effectively, combination of photon-generated carriers can be prevented; therefore, the effect of stable hydrogen generation can be achieved under the action of visible light, and the new material has a pretty good application prospect of industrialization.

The invention relates to a tungsten carbide/cadmium zinc sulfide composite photocatalyst as well as a preparation method and application thereof. The method comprises the following steps: S1, dispersing tungsten carbide in water to obtain turbid liquid; S2, adding soluble cadmium salt and soluble zinc salt into the turbid liquid according to a molar mass ratio of cadmium to zinc of 1: 10-10: 1, then adjusting the pH value to 4-10, and uniformly performing stirring; S3, adding the sodium sulfide solution or the potassium sulfide solution into the turbid liquid according to a ratio of the totalmolar mass of cadmium in the soluble cadmium salt and zinc in the soluble zinc salt to the molar mass of sulfur in the sodium sulfide solution and/or the potassium sulfide solution being 1: 1 to 1-2;continuously performing stirring to obtain a tungsten carbide/cadmium zinc sulfide composite photocatalyst. The tungsten carbide/cadmium zinc sulfide composite photocatalyst has excellent photocatalytic hydrogen production performance. The invention also comprises application of the composite photocatalyst in preparation of hydrogen by decomposing water.

The invention discloses a photocatalyst for efficiently photocatalytically decomposing water to produce hydrogen and a preparation method of the photocatalyst. Cadmium zinc sulfide in the photocatalyst is of a granular structure, the diameter of the cadmium zinc sulfide is about 20 nm to 100 nm, MoS2 is of a flower-shaped structure formed by stacking two-dimensional sheets, and cadmium zinc sulfide solid solution particles are evenly distributed on the surface of MoS2. The preparation method comprises the following steps: respectively adding cadmium acetate and anhydrous zinc acetate into absolute ethyl alcohol, uniformly stirring a mixed solution, then adding thioacetamide and MoS2, uniformly stirring again to obtain a raw material solution, transferring the raw material solution into a reaction kettle, reacting at high temperature, cooling the solution to room temperature after the reaction is finished, centrifuging the obtained product through a centrifugal machine, collecting precipitates; and cross-washing the precipitates with deionized water and absolute ethyl alcohol, and drying the washed precipitates in a drying oven to obtain a product, namely the MoS2/Zn0. 5Cd0. 5S photocatalyst. The flower-like metal sulfide (MoS2) and cadmium zinc sulfide are compounded to construct the heterojunction, thereby enhancing the water photolysis hydrogen production performance.

The invention discloses a visible light-assisted Fenton promoter as well as a preparation method and an application thereof. The Fenton promoter is composed of a cadmium-zinc sulfide solid solution. Based on a solid solution cocatalyst containing three elements of cadmium, zinc and sulfur, the catalyst is prepared from zinc acetate, cadmium chloride and thioacetamide through a simple solvothermal method. The experiments prove that the co-catalyst has multiple excellent characteristics of good morphology, excellent photo-Fenton co-catalysis performance, recyclability and the like, is expected to play an important role in sewage treatment, and has a wide application prospect.

The invention relates to a cadmium zinc sulfide/mesoscopic niobium pentoxide S-type heterojunction fiber photocatalyst. A cadmium zinc sulfide/mesoscopic niobium pentoxide S-type heterojunction is composed of a (001) diffraction crystal face of mesoscopic niobium pentoxide and a (002) diffraction crystal face of cadmium zinc sulfide. The preparation method comprises the following steps: adding mesoscopic niobium pentoxide in the hydrothermal growth process of cadmium zinc sulfide, and carrying out secondary hydrothermal treatment to obtain the cadmium zinc sulfide/mesoscopic niobium pentoxide S-type heterojunction fiber photocatalyst. The zinc cadmium sulfide/mesoscopic niobium pentoxide S-type heterojunction fiber photocatalyst is applied to catalytic oxidation degradation and reduction of antibiotics under visible light. The zinc cadmium sulfide/mesoscopic niobium pentoxide S-type heterojunction fiber photocatalyst is applied to hydrogen production through catalytic oxidation, degradation and reduction of antibiotics under visible light. The cadmium zinc sulfide/mesoscopic niobium pentoxide S-type heterojunction fiber photocatalyst has the beneficial effects that the photocatalytic performance is excellent, and due to the formation of an S-type heterojunction, the cadmium zinc sulfide/mesoscopic niobium pentoxide S-type heterojunction fiber photocatalyst has stronger light absorption capacity and higher carrier separation efficiency.

The invention relates to a preparation method of a cadmium zinc sulfide-titanic acid nanotube composite photocatalyst. The prepared cadmium zinc sulfide-titanic acid nanotube composite photocatalyst has relatively high adsorption and photocatalysis performance on wastewater, and the preparation method of the photocatalyst also has the characteristics of low preparation process cost, simple process, easiness in control and the like.