231 results about "Cadmium acetate" 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 present invention discloses the preparation process of CdSe/CdS, CdSe/ZnS and other II-VI type core-shell quantum dot. The CdSe/CdS and CdSe/ZnS core-shell quantum dot are prepared with cadmium acetate, zinc acetate or other inorganic compound, instead of Cd(CH3)2, Zn(CH3)2 or other inflammable, detonable and expensive organic metal compound, as material. The prdouct has excellent single dispersivity, improved fluorescent property, high quantum yield, high stability, and may be used widely as the fluorescent mark for biological detection and analysis.

The invention discloses synthesis methods of a tri-(4-triazolyl phenyl) amine and a tri-(4-triazolyl phenyl) amine cadmium complex, and relates to the field of luminescent materials. The synthesis method of the tri-(4-triazolyl phenyl) amine takes copper oxide as a catalyst and dimethylsulfoxide as a solvent, tri-(4-iodobenzene) amine and triazole react at the temperature of 120-170 DEG C, then the mixture is diluted by the solvent, filtered, decolored, separated and purified sequentially to obtain the tri-(4-triazolyl phenyl) amine; the synthesis method of the cadmium complex is carried out by mixing 5-aminoisophthalic acid, 3-(4-triazolyl phenyl) amine and cadmium acetate into a mixed solution of water and alcohol, then the mixture is uniformly stirred under the acid or neutral condition to obtain a reaction liquid, and the reaction liquid is put into a reaction kettle to crystalize and react to obtain the tri-(4-triazolyl phenyl) amine cadmium complex. The synthesis methods obtain the tri-(4-triazolyl phenyl) amine and the tri-(4-triazolyl phenyl) amine cadmium complex, whose crystal purities are more than 95% and whose yields are more than 85%, through the simple synthesis route.

The invention discloses a synthesis method and use of nano cadmium zinc sulfide with visible light catalytic activity and relates to a synthesis method and use of a sulfide having visible light catalytic activity. When the synthesis method is used, the long reaction time and high reaction temperature problems of the conventional method for preparing cadmium zinc sulfide are solved. The synthesis method comprises: dissolving zinc acetate, cadmium acetate, thioacetamide and dodecyl benzene sulphonic acid in alcohol solvent to obtain mixed solution; and placing the mixed solution in microwaves for reaction. The nano cadmium zinc sulfide synthesized by the method can be used as a photocatalytic material for use in the hydrogen production by decomposition in visible light. The synthesis methoddisclosed by the invention adopts a simple process and readily available raw material, and can synthesize the nano cadmium zinc sulfide quickly with small energy consumption and high yield. The nano cadmium zinc sulfide has uniform particles and high purity and has high strong absorbability at wavelength of about 490 nanometers; and the nano cadmium zinc sulfide demonstrates good visible light response property, and the hydrogen generation rate reaches 300 to 450 millimoles/h<-1>.g<-1>, which is very high.

The invention provides a method for preparing monodisperse cadmium sulfide nanospheres, comprising steps of adding cadmium acetate dihydrate and sulfourea into deionized water respectively to obtain a solution A and a solution B, and adding the solution B into the solution A to obtain a solution C; uniformly mixing a PVP (Polyvinyl Pyrrolidone) solution D and the solution C to obtain a solution E; transferring the solution E into a hydrothermal reactor with Teflon as a lining, sealing the hydrothermal reactor, then putting the hydrothermal reactor into a temperature-pressure dual-control microwave hydrothermal reaction instrument for implementation of a preparation reaction in a temperature control mode, and naturally cooling after reaction completion; opening the hydrothermal reactor under the room temperature, washing with ethanol, then washing with the deionized water, performing centrifugal collection by taking absolute ethyl alcohol as a solvent, and drying at the temperature of 60 DEG C to obtain products CdS nanospheres. With the adoption of the method for preparing the monodisperse cadmium sulfide nanospheres, the high-temperature high-pressure environment of a hydrothermal method and the fast heating characteristic of a microwave method are combined; and with the adoption of a preparation technology of a microwave hydrothermal method, the monodisperse cadmium sulfide nanospheres with a regular spherical shape are prepared; and in addition, the method is short in preparation period, low in required temperature, small in pollution, low in energy consumption, simple to operate and high in repeatability, thereby being applicable for mass production.

The invention discloses an assembling method of quantum point in the dielectric silica, which comprises the following steps: adopting SBA-15 as mould; making amino propyl trimethoxy silane to decorate dielectric silica; adding cadmium acetate; adsorbing Cd2+ in the channel to form SBA-15-Cd2+; reacting with TOPO, Se or Te; controlling reacting time to the grain size of cadmium selenide of quantum point of or cadmium telluride in the channel.

The invention discloses a preparation method of low-cost and high-quality Cu2CdSnSe4 nano crystals. The method comprises the following steps of: adding oleamide, acetylacetone acid copper, cadmium acetate, tin acetate and selenium powder which are reactant precursors into a reaction flask; then raising the temperature for reacting; and finally obtaining the high-quality Cu2CdSnSe4 nano crystals. The invention has the advantages that the preparation method of the nano crystals is simple; the used precursor materials have low cost; and the prepared nano crystal granules have better dispersity and crystallinity, and the like. The nano crystals prepared by using the method can be used as materials of thermoelectric devices.

The invention relates to a method for synthesizing powder of cadmium selenide quanta dots capable of emitting blue light, belonging to the technical field of processing nanometer inorganic compound material of semiconductor. With cadmium acetate dehydrate and sodium selenite as raw material, disodium ethylenediamintetraacetate as chelating agent, and in the aqueous solution with weak alkaline, cadmium selenide quanta dots are synthesized by being radiated by electron beams. The powder of cadmium selenide quanta dots is obtained after separating the synthesized product. The cadmium selenide powder prepared by the invention has extremely good water solubility, good monodispersity, and even size with an average particle size of three nanometers. The cadmium selenide powder emits blue light, has good fluorescence characteristics and is used for manufacturing biological fluorescence probe.

The invention discloses a cadmium sulfide coating carbon nano tube gas-sensitive material and a manufacture method of a gas-sensitive element. The manufacture method comprises the following steps: a carbon nano tube is processed by ultrasonic dispersion in the room temperature, and then a certain amount of thiacetamide and cadmium acetate is sequentially added; after that, the mixture is processed by the ultrasound for half an hour and placed in the water bath of 60 DEG C to 90 DEG C to be blended for 0.5 to 6 hours, thus obtaining the cadmium sulfide coating multi-walled carbon nano-tube nano powder material; after being dried in vacuum, the power material is prepared into sizing agent which is coated on a ceramic tube carrier, undergoes heat treatment of 400 to 500 DEG C, is welded and encapsulated and undergoes the electrical ageing, thus obtaining the side-heating type gas-sensitive element which has high sensitivity and good selectivity of ethanol gas. The gas-sensitive element has the simple structure, low request on manufacturing techniques and use conditions, convenient and reliable use, and low manufacturing cost.

The invention discloses a preparation method of a low-cost cadmium phosphide quantum dot material. The preparation method comprises the following steps: based on a cheap cadmium compound such as cadmium oxide, cadmium acetate or cadmium cetylacetonate and the like as a raw material, dissolving the cadmium compound and long-chain fatty acid in octadecylene at a high temperature so as to prepare a long-chain fatty acid salt of cadmium; or dissolving cadmium cetylacetonate in organic amine, and then carrying out a gas-liquid reaction based on hydrogen phosphide as a phosphorus source so as to prepare the high-quality cadmium phosphide quantum dot luminescent material. According to the invention, a cheap and continuously operable synthesis method is provided for the cadmium phosphide quantum dot material, and a solid foundation is provided for industrialized production of the cadmium phosphide quantum dot material; and through controlling factors such as reaction temperature, time and the like, the luminescence of the cadmium phosphide quantum dot material can be achieved in a wide region ranging from visible light (460nm) to infrared light (1500nm).

The invention discloses a preparation method of cadmium vanadate nanorods, belonging to the technical field of nano material preparation. The preparation method comprises the following steps: by using cadmium acetate and sodium vanadate in a mol ratio of 1:1 as raw materials, polyvinylpyrrolidone (PVP) as a surfactant and water as a solvent, evenly mixing the cadmium acetate, sodium vanadate, PVP and water, sealing in a reaction vessel, and keeping at the temperature of 100-200 DEG C for 2-24 hours, wherein the amount of the cadmium acetate and sodium vanadate is not greater than 10 wt% of the water, and the amount of the PVP is not greater than 10 wt% of the water. The invention has the advantages of low preparation temperature, simple preparation process, no after-treatment procedure, low cost, and high purity and degree of crystallinity of the obtained cadmium vanadate nanorods, and thus, can easily implement industrialized production.

The invention discloses a flaky CdS/BiOCl composite nanometer material and a preparation method thereof. The preparation method comprises the following steps: mixing an ethanol solution containing an appropriate amount of bismuth nitrate with a sodium chloride water solution, magnetically stirring for 10 to 20 minutes, and conducting microwave reaction to obtain BiOCl nanometer powder; weighing 0.2 g of BiOCl to be added into 30 mL of a water solution containing a certain amount of cadmium acetate, and conducting ultrasound dispersion for 15 to 20 minutes to obtain a dispersion liquid A; weighing an appropriate amount of thiourea to be added into 30 mL of deionized water, and dissolving to obtain a solution B; adding the solution B into the dispersion liquid A, magnetically stirring for 10 to 20 minutes, placing a reaction mixture in a household microwave oven, setting a low fire level, and heating for 20 minutes; after the reaction is finished, naturally cooling, and conducting suction filtration and drying, so as to obtain the flaky CdS/BiOCl composite nanometer material. The flaky CdS/BiOCl composite nanometer material is high in yield and novel in structure, the size is 200-600 nm, the nanometer flaky substrate is BiOCl, and the granular CdS nanocrystals are compactly loaded on the surface of BiOCl flakes. The flaky CdS/BiOCl composite nanometer material and the preparation method thereof have the advantages that the operation is simple, the repeatability is good, the environment can be protected, and the energy can be saved.

The invention relates to the technical field of composite nanomaterials and in particular discloses a method for preparing a CdS/MoS2 composite hollow-block photocatalyst by taking cadmium acetate, sodium bicarbonate, PVP, sodium molybdate and thiourea as raw materials, particularly a method for preparing a component photocatalyst with the advantages of simple preparation process and excellent visible-light catalytic activity of the product. The method comprises the following steps: weighing cadmium acetate and PVP, and dissolving in deionized water according to a mass ratio of 1:10; adding sodium bicarbonate into the mixture, so that the mass ratio of the cadmium acetate to sodium bicarbonate is 1:2; stirring and reacting at room temperature for 2 hours, washing and centrifuging the product after the reaction is completed, thereby obtaining cadmium carbonate; dissolving the cadmium carbonate, sodium molybdate and thiourea in the deionized water according to a mass ratio of (1):(0.15-1.4):(4), mixing and stirring, carrying out a hydrothermal reaction under the condition of 220 DEG C for 24 hours, washing and centrifuging the product after the reaction is completed, and drying, thereby obtaining the CdS/MoS2 composite photocatalyst.

The invention relates to a preparation method for a novel CdS/MIL-53 (Fe) visible light catalyst. The preparation method comprises the steps that an MIL-53 (Fe) material is prepared from ferric trichloride, terephthalic acid and N,N-dimethylformamide at the molar ratio of 1:1:65 by adopting the solvothermal method at first; then cadmium acetate, thioacetamide, polyvinylpyrrolidone, ethylene glycol and MIL-53 (Fe) are weighed according to the mass ratio of cadmium sulfide to the MIL-53 (Fe) being (1-1.5):1, and the MIL-53 (Fe) is dispersed in the ethylene glycol; the cadmium acetate is added; and the thioacetamide and the polyvinylpyrrolidone are added, reaction is conducted for 12 hours at the temperature of 180 DEG C, centrifugation, secondary distilled water washing and absolute ethyl alcohol washing are conducted for 5-6 times, drying is conducted for 10 hours at the temperature of 60 DEG C, and the CdS/MIL-53 (Fe) visible light catalyst is finally obtained. The catalytic activity of the CdS/MIL-53 (Fe) visible light catalyst is excellent, and the degradation rate of the visible light catalyst on rhodamine B is 71%-90%.

The invention discloses a method for preparing a luminescence-adjustable ligand-free cadmium sulfide quantum dot. The quantum dot does not need any organic molecules as ligands, has good stability, can be effectively hybridized with organic materials and prevents the phenomenon of phase separation in the hybridization process, and the luminescence wave length can be precisely adjusted along with a synthesis condition. According to the preparation method of the luminescence-adjustable ligand-free cadmium sulfide semiconductor quantum dot, cadmium acetate, cadmium propionate or cadmium stearate is selected as a cadmium source, and thiourea or sodium sulfide is selected as a sulfur source, and the luminescence-adjustable ligand-free cadmium sulfide semiconductor quantum dot can be prepared without any organic molecules as a cladding agent.

The invention discloses a cadmium coordination polymer by taking 1,3-bis(pyridine-3-methoxy)benzen and 1,4-phthalic acid as ligands, and a preparation method and fluorescent performance of the coordination polymer, belonging to the field of chemistry. The chemical formula of the coordination polymer is [Cd(1,4-BDC)(bpmb)(H2O)]<n>, wherein 1,4-H2BDC is equal to 1,4-phthalic acid; bpmb is equal to 1,3-bis(pyridine-3-methoxy)benzen. The coordinate polymer is prepared from cadmium acetate dihydrate, 1,4-phthalic acid, 1,3-bis(pyridine-3-methoxy)benzen. The complex can be specifically applied onto a fluorescent material. The coordination polymer is stable at room temperature, the preparation method is simple in technology, and the coordination polymer has stable fluorescent performance at room temperature.

The invention provides a method for testing content of hydrogen cyanide in gas. The method comprises the following steps of: absorbing the hydrogen cyanide in the gas by adopting a potassium hydroxide solution, transferring the absorption solution to a volumetric flask with a certain volume, taking a certain amount of absorption solution, adding a cadmium acetate solution to make sulfide in the absorption solution to form indissolvable cadmium sulfide to sediment, filtering and sintering the absorption solution to eliminate the sediments, taking Dabr as an indicator of the solution, taking a standard silver nitrate solution to titrate, making cyanide ions react with silver nitrateto form soluble cyanide complex ion (Ag(CN)2), making excessive silver ions react with the Dabar indicator so as to make the color of the solution change from yellow to orange to the end, and calculating the content of the hydrogen cyanide according to the volume of the consumed standard silver nitrate solution. The method provided by the invention solves the problems that various kinds of reagents used in the prior art are poisonous and harmful, and moreover the reagents have the disadvantages of complex analysis step, long elapsed time and the like, have potential safety hazards existing in the testing process, and enhance the sewage treatment load of the back section. The method can rapidly and accurately test the content of the hydrogen cyanide in coke oven coal.

The invention discloses a layered stromal HTiTaO5/CdS Pt-carrying new-typed composite catalyst and making method, which comprises the following steps: mixing K2CO3, Ta2O5 and TiO2 at chemical gauge rate; sintering to obtain the KTiTaO5 product; proceeding KTiTaO5 to obtain catalyst layered stromal HTiTaO5 through nitric ion exchange; exchanging the stromal HTiTaO5 with saturated cadmium acetate ion through pile-supported propanamine; vulcanizing the exchanged stromal HTiTaO5 in the pipe-typed furnace hydrogen sulfide atmosphere at high temperature to produce HTiTaO5/CdS; carrying Pt through photoreduction. The invention reaches the highest hydrogen-producing rate at 144umol/h and 6.3 percent quantum efficiency at 420 nm and 1.67 percent optical conversion efficiency for all-band of visible light, which improves the product activity.

The invention relates to a BaTiO3-CdS nanometer composite photocatalyst and a preparation method thereof and belongs to the technical fields of material preparation and photocatalysis. The method comprises the steps: firstly, synthesizing barium titanate by taking tetrabutyl titanate, potassium hydroxide, barium hydroxide, cadmium acetate and thiourea as raw materials and using a sol-gel method; and then, synthesizing a BaTiO3-CdS nanometer composite structure step by step by using a coprecipitation method. The composite catalyst prepared by using the method can be used for effectively improving the separation of photon-generated carriers, reducing the recombination ratio of the carriers and catalyzing water splitting hydrogen production, has good photocatalytic activity and shows a more excellent photocatalytic performance than a single material. The photocatalytic activity is 88.5 times as much as that of pure CdS, and therefore, the BaTiO3-CdS nanometer composite photocatalyst has awide application prospect in the field of photocatalysis.