Method for reducing chlorine and sulfate radical foreign matter in water-indissoluble carbonate

Method for producing monodisperse cube shaped pulmbous sulfide nanocrystalline

The invention relates to a method for preparing single-dispersed cubelike lead sulphide nano crystal. The method comprises the steps that lead acetate, thiacetamide, dodecyl sodium sulfate and hexadecyl trimethyl ammonium bromide are mixed into a reagent in the mol ratio of 1-2 to 2-3 to 0.15-0.2 to 0.2-0.3, the reagent is added into deionized water and stirred evenly, and the mass ratio of the reagent to the deionized water is 1 to between 20 and 40; and then a reaction solution is placed into a sealed reaction kettle, performs reaction at a temperature of between 120 and 160 DEG C for 8 to 16 hours, and is cooled to the room temperature, filtered, washed and dried. The method adopts simple controllable hydro-thermal reaction to prepare the single-dispersed cubelike lead sulphide nano crystal. The method has the advantages of easily obtained and cheap materials, simple process, low cost, high product purity and good repeatability, and is favorable for industrialized production on a large ...

Method for preparing carbon nano-tube/CdS nano flower composite material

The invention discloses a preparation method of carbon nano-tube/CdS nano-flower composite material in water bath condition. The carbon nano-tubes after purification processing are dispersed to sodium dodecyl benzene sulfonate solution in an ultrasonic way and cadmium chloride solution and thiacetamide solution are added so as to achieve mixed solution. PH value of the mixed solution is adjusted to 1. The mixed solution is processed in water bath which is between 40 DEG C and 65 DEG C for at least 6 hours and then after centrifugal filtration, repeated washing with deionized water and desiccation, the product is achieved. The preparation method provided by the invention has the advantages of simpleness, low reaction temperature and easiness to the industrialized production.

Method for producing pulmbous sulfide dendrite from particle adhesion

The invention relates to a method for preparing lead sulphide dendrite by conglutinating particles. At present, no method exists for preparing the lead sulphide dendrite by conglutinating the particles at low temperature. The method comprises the following steps: lead acetate, thioacetamide and sodium dodecyl sulfate with the molar ratio of 1-2 to 2-3 to 0.1-0.2 are mixed to form a reactant; the reactant is added into deionized water and is evenly stirred; the mass ratio of the reactant to the deionized water is between 1 to 20 and 1 to 40; and the reaction solution is put to a closed reaction kettle, reacts for 8 to 16 hours at a temperature between 60 and 80 DEG C, is cooled to the room temperature and is filtered, washed and dried. Through a simple controllable hydrothermal reaction, the lead sulphide dendrite formed by conglutinating the particles is prepared by the method; and the method has cheap and available raw materials, simple process, low cost, high-purity products and good ...

Method for preparing nano dendritic crystal of lead sulfide

Electric heating composite material for temperature measurement and preparation method thereof

Method for preparation of hollow spherical cadmium sulfide nanocrystalline

The invention discloses a method for preparing a hollow spherical cadmium sulfide nano-crystal. The method adopts a hydro-thermal method, and comprises the following steps of: firstly, adding sodium dodecyl sulfonate and hexadecyl trimethyl ammonium bromide into deionized water, sufficiently stirring the mixed solution until the sodium dodecyl sulfonate and the hexadecyl trimethyl ammonium bromide are completely dissolved in the water to form a transparent solution, and adding cadmium chloride and thioacetamide into the transparent solution to stir and mix evenly; then, adding the mixed solution in a hydrothermal reaction kettle, sealing the hydrothermal reaction kettle at a temperature of between 80 and 160 DEG C for 6 to 24 hours; opening the reaction kettle after the reaction kettle is naturally cooled to room temperature; and scrubbing and precipitating the reacted mixed solution by the deionized water and absolute ethyl alcohol, and centrifugally filtering and drying the precipitate ...

Method for preparing carbon nano-tube/CdS nano flower composite material

The invention discloses a preparation method of carbon nano-tube/CdS nano-flower composite material in water bath condition. The carbon nano-tubes after purification processing are dispersed to sodium dodecyl benzene sulfonate solution in an ultrasonic way and cadmium chloride solution and thiacetamide solution are added so as to achieve mixed solution. PH value of the mixed solution is adjusted to 1. The mixed solution is processed in water bath which is between 40 DEG C and 65 DEG C for at least 6 hours and then after centrifugal filtration, repeated washing with deionized water and desiccation, the product is achieved. The preparation method provided by the invention has the advantages of simpleness, low reaction temperature and easiness to the industrialized production.

Process for producing iron phosphate

Method for preparing nano ZnS coated carbon nano-tube

The invention discloses a method for preparing nano-ZnS coating carbon nano-tubes. The method uses a hydrothermal method, which is that the carbon nano-tubes are first purified and dispersed into deoxysodium cholate solution by ultrasonic, then zinc acetate and thioacetamide are added in sequence, and the obtained solution is put into a reaction vessel to react for at least 12 hours under the condition of 100 DEG C to 120 DEG C to be filtrated, washed by using deionized water and at last dried to obtain the final product. The preparation method of the invention is simple and is easy to be applied to industrialized production; the adoption of the nano-ZnS coating carbon nano-tubes has good effect.

Method for preparing nano ZnS coated carbon nano-tube

Process for producing alkali iron lithium phosphate

Method for producing manganese dioxide coating carbon nano-tube core-shell type composite material

Method for preparing lead sulfide micron-sized elliptical rings

The invention relates to a method for preparing lead sulfide micron-sized elliptical rings. In the method, lead acetate is used as a lead source, thiourea is used as a sulfur source, and reaction is carried out in a closed reactor. Particularly, the method comprises the following steps: mixing the lead acetate, the thiourea and hexadecyl trimethyl ammonium bromide to prepare reactants; adding the reactants into deionized water to prepare a reaction solution; placing the reaction solution in a closed reactor kettle for reaction at a temperature of between 70 and 90 DEG C for 8 to 16 hours; and cooling the solution obtained after the reaction to normal temperature, and obtaining the lead sulfide micron-sized elliptical rings after filtration, washing and drying. The method has the advantages of cheap and readily-available raw material, simple process, low cost, high product purity, easy implementation and control, good process repeatability and favorable large-scale industrial production.

Method for fabricating nano rod of lead sulfide

Method for producing monodisperse hollow cube shaped pulmbous sulfide nanocrystalline

The invention relates to a method for preparing single-dispersed hollow cubelike lead sulphide nano crystal. The method comprises the steps that lead acetate, thiacetamide, dodecyl sodium sulfate and hexadecyl trimethyl ammonium bromide are mixed into a reagent in the mol ratio of 1-2 to 2-3 to 0.15-0.2 to 0.2-0.3, the reagent is added into deionized water and stirred evenly, and the mass ratio of the reagent to the deionized water is 1 to between 20 and 40; and then a reaction solution is placed into a sealed reaction kettle, performs reaction at a temperature of between 90 and 110 DEG C for 8 to 16 hours, and is cooled to the room temperature, filtered, washed and dried. The method adopts simple controllable hydro-thermal reaction to prepare the hollow cubelike lead sulphide nano crystal. The method has the advantages of easily obtained and cheap materials, simple process, low cost, high product purity and good repeatability, and is favorable for industrialized production on a large scale ...

Method for producing monodisperse pulmbous sulfide nanospheres

The invention relates to a method for preparing single-dispersed lead sulphide nanospheres. The method comprises the steps that lead acetate, thiacetamide, dodecyl sodium sulfate and hexadecyl trimethyl ammonium bromide are mixed into a reagent in the mol ratio of 1-2 to 2-3 to 0.1-0.2 to 0.1-0.2, or added into deionized water and stirred evenly, and the mass ratio of the reagent to the deionized water is 1 to between 20 and 40; and then a reaction solution is placed into a sealed reaction kettle, performs reaction at a temperature of between 60 and 80 DEG C for 8 to 16 hours, and is cooled to the room temperature, filtered, washed and dried. The method adopts simple controllable hydro-thermal reaction to prepare the single-dispersed lead sulphide nanospheres; and the diameter distribution of the prepared lead sulphide nanospheres is narrow. The method has the advantages of easily obtained and cheap materials, simple process, low cost, high product purity and good repeatability, and is ...

Method for preparing hexagon star-shaped plumbous sulfide nanocrystalline

The invention discloses a method preparing hexagram PBS nanocrystal. The process is as follows: cetyltrimethylammonium bromide is added into deionized water, and stirred efficiently to dissolve completely in the water, and then the transparent solution is obtained; lead acetate and thiourea are added into the transparent solution, stirred uniformly, and then added to the hydrothermal reaction kettle; the solution which is in the hydrothermal reaction autoclave keeps the temperature in 80 DEG C to 160 DEG C about 6 to 24 hours; the reaction autoclave is opened until the temperature is reduced to the room temperature through the natural cooling; and the solution is washed by deionized water and absolute ethyl alcohol, centrifugally filtrated; the precipitate is dried, and then the final product is obtained. The invention has the advantages of easy preparation, low reaction temperature, less energy consumption and low cost. The invention is beneficial to industrial production.

Process for producing iron phosphate

Carbon nano tube reinforced polyvinyl alcohol composite material and its preparing method

Method for producing Nano carbon tube clad by metallic sulfide

Method for preparation of hollow spherical cadmium sulfide nanocrystalline

The invention discloses a method for preparing a hollow spherical cadmium sulfide nano-crystal. The method adopts a hydro-thermal method, and comprises the following steps of: firstly, adding sodium dodecyl sulfonate and hexadecyl trimethyl ammonium bromide into deionized water, sufficiently stirring the mixed solution until the sodium dodecyl sulfonate and the hexadecyl trimethyl ammonium bromide are completely dissolved in the water to form a transparent solution, and adding cadmium chloride and thioacetamide into the transparent solution to stir and mix evenly; then, adding the mixed solution in a hydrothermal reaction kettle, sealing the hydrothermal reaction kettle at a temperature of between 80 and 160 DEG C for 6 to 24 hours; opening the reaction kettle after the reaction kettle isnaturally cooled to room temperature; and scrubbing and precipitating the reacted mixed solution by the deionized water and absolute ethyl alcohol, and centrifugally filtering and drying the precipitate ...

Process for producing carbon coated iron lithium phosphate

Process for producing alkali iron lithium phosphate

The invention relates to a preparation method of basic lithium iron phosphate. The invention takes iron source compound and acid lithium phosphate as raw material, takes simple organic matter as the catalyst, the raw material and the catalyst which are mixed react for 20 minutes to 10 hours under 100 to 160 DEG C, therefore, the basic lithium iron phosphate with the chemical formula of LixFemPO4(OH) can be synthesized, wherein, the x is larger than or equal to 0.90 and smaller than or equal to 1.10, and the m is larger than or equal to 0.90 and smaller than or equal to 1.10. The acid lithium phosphate adopted by the invention can be gotten by adopting a routine method. The raw material and the catalyst adopted by the invention are commonly used cheap raw material, or can be prepared by the commonly used cheap raw material, the reaction is performed under a lower temperature and in ordinary pressure, the required equipment is simple, the energy consumption is low, therefore, the cost of ...