90 results about "Bismuth citrate" patented technology

The invention relates to a nanometer composite material, in particular to a nanometer bismuth/carbon composite material and a preparation method thereof. A nanometer bismuth and carbon compound is obtained by taking various carbon materials as a substrate, bismuth nitrate, bismuth chloride, bismuth sulfate, bismuth acetate, bismuth citrate and the like as a bismuth source, water containing an organic complexing agent, ethylene glycol, propylene glycol or other mixture as a solvent and sodium borohydride, potassium borohydride, hydrazine hydrate and the like as a reducing agent and by an absorption-thermal decomposition-reduction method. According to the method, a solution containing bismuth ions is absorbed to a surface of a carbon material, remaining solution is filtered, the bismuth oxide/bismuth and carbon compound is obtained after drying and thermal treatment, and the nanometer bismuth/carbon composite material is finally obtained by reduction reaction. In the composite material obtained by the method, metal bismuth particles are uniformly distributed in surfaces of carbon particles in nanometer size, and a phenomenon that a large amount of bismuth can be agglomerated by a traditional bismuth reduction method is prevented.

The invention relates to a method for preparing a bismuth-series chemical product, comprising steps as follows: firstly, preparing ordinary-level bismuth oxide by refined bismuth; then preparing a bismuth-series chemical product by the ordinary-level bismuth oxide including steps of refined bismuth pulverization, bismuth low-temperature oxidation, ordinary bismuth oxide chemical conversion, and the like; finally preparing bismuth-series chemical products of bismuth nitrate, bismuth subnitrate, bismuth subcarbonate, bismuthsalicylate, basic bismuth salicylate, bismuth citrate, bismuth trichlor, bismuth oxychloride, electric bismuth oxide or bismuth oxide nanowire, and the like; and recycling chemically-converted mother-liquid. The invention has the advantages of generating no cancerigenic poison gas NOx and waste water, having environment protection, little consumption of chemical reagent, little energy consumption, low cost, simple device and operation, and the like.

Iodine doped bismuthyl carbonate nanosheet and molybdenum disulfide modified carbon nanofiber composites, preparation method and its application in wastewater treatment are disclosed. Bismuth citrate and sodium carbonate as precursors, sodium carbonate as a precipitating agent, dispersed in a mixed solution of water and ethylene glycol, sodium iodide as a iodine source, nano carbon fiber membrane act as the carrier, to synthesis carbon fiber membrane that modified by iodine-doped Bi₂O₂CO₃ nanosheets; then sodium molybdate and thioacetamide as precursors, dispersed in water to react to obtain iodine doped bismuthyl carbonate nanosheet and molybdenum disulfide modified carbon nanofiber composites. The composite material synthesized through a series of steps exhibit excellent photocatalytic activity for the degradation of Rhodamine B and can be recycled for many times. And this invention has the advantages of simple preparation process, easy recovery and multiple use, etc., and has industrial application prospect in water pollution treatment.

The invention discloses a preparation method of metastable phase bismuth oxide and application thereof in photocatalytic degradation of organic pollutants. The preparation method comprises the following steps: carrying out hydrothermal reaction on an aqueous solution which contains ammonium bismuth citrate, urea and hexadecyl trimethyl ammonium bromide to obtain bismuthyl carbonate microflowers; and calcining the bismuthyl carbonate microflowers in an air environment to obtain the metastable phase bismuth oxide beta-Bi2O3/Bi2O2.33@Bi2O2CO3. The preparation method is simple and controllable to operate, and is environmentally friendly. The synthesized metastable phase bismuth oxide has the advantages of visible-light response, large specific surface area, high catalytic activity and the like, has the characteristics of rapidness and high efficiency in a process of visible-light catalytic degradation of the organic pollutants, and can be widely applied to the technical field of treatment of the organic pollutants.

The invention relates to a gold-supported bismuth subcarbonate material for photocatalysis and a preparation method thereof, and belongs to the field of inorganic nano-materials. The preparation method of gold-supported bismuth subcarbonate microspheres comprises the steps that firstly, ammonium bismuth citrate and sodium carbonate are added in water and stirred to obtain an even supernatant solution; secondly, the solution is placed in a hydrothermal reaction kettle for a hydrothermal reaction at 160 DEG C for 24 h; thirdly, precipitate obtained through the reaction is centrifuged, washed and dried to obtain bismuth subcarbonate nanospheres. The gold supporting method comprises the steps that the prepared bismuth subcarbonate reacts with urea, chloroauric acid and water on the water bath condition at 80 DEG C for 4 h, washing and drying are performed after natural cooling is performed, and then the gold-supported bismuth subcarbonate nanospheres are obtained. According to the prepared gold-supported bismuth subcarbonate nanospheres, the physical phase is orthorhombic-phase bismuth subcarbonate of which the JCPDS number is 84-1752, the nanospheres are in the shape of a sphere, the diameter is 2-5 micrometers, and the size of gold particles on the surfaces is 5-10 nm.

The present invention discloses a method for preparing ranitidine bismuth citrate. Said method includes the following steps: making bismuth citrate be suspended in water, adding ranitidine and ammonia water to make reaction, the mole ratio of bismuth citrate, ammonia and ranitidine is 1:1-10:0.9, controlling reaction system pH value and making it be 6-12, its reaction temperature is 4-64deg.C, monitoring pH value, after the pH value is reached to neutrality, stopping reaction, filtering reaction solution and spray-drying so as to obtain the invented ranitidine bismuth citrate.

The invention provides a bismuth series photocatalyst. The bismuth series photocatalyst has a molecular formula represented by formula (I): Nm[(BiO)2CO3] (1-m) (I), wherein m is ranged in 0.01-5%. According to the invention, a bismuth source and a nitrogen source are used as raw materials, a hydrothermal reaction is carried out on the raw materials in a water solution, and the bismuth series photocatalyst having the molecular formula represented by formula (I) is obtained. The bismuth source is bismuth citrate or bismuth citrate ammonia. In the bismuth series photocatalyst provided by the invention, N element is introduced into the crystal lattice of the (BiO)2CO3 crystal; due to the presence of the N element, the band gap of the bismuth series photocatalyst provided by the invention is reduced to 2.0-2.9eV, and the absorption spectrum is expanded to the visible region from the ultraviolet region, in this way, the bismuth series photocatalyst can be excited by the visible light, and has a high visible light catalytic activity. Furthermore, the preparation method provided by the invention is mild in reaction condition and simple in operation, and the preparation method is suitable for large scale production.

The invention discloses a method to compounding citron acid bismuth by hydrothermal. It adopts bismuth oxide and citron acid by hydrothermal compounding and filtering and drying to gain citron acid bismuth. The result of the invention has high purity, fully reaction high atom economical efficiency, short reaction time. It has no harmful to environment.

The invention relates to a method for synthesizing a Bi2O3/(BiO)2CO3 composite photocatalytic material and belongs to the technical field of chemical industry. The method comprises the steps of weighing three kinds of chemical reagent raw materials, i.e., Na2CO3, bismuth citrate and NaOH according to a mole ratio, carrying out mixing, stirring the mixture in secondary distilled water for certain time, carrying out treatment by a programmed-heating hydrothermal process, then, carrying out repeated washing separately with deionized water and anhydrous ethanol, and carrying out baking, thereby obtaining the final product, i.e., the Bi2O3/(BiO)2CO3 composite photocatalytic material. The surface morphology, microscopic structure and photocatalytic activity of the composite photocatalytic material are assayed, and the degradation of a variety of dyes such as rhodamine B under different light sources by the hierarchical garland-shaped Bi2O3/(BiO)2CO3 composite photocatalytic material is greatly improved. The product is simple and practical in preparation process and stable in performance and has considerable applicability to a variety of dyes.

The invention discloses a preparation method of Bi4Ti3O12 nanosheets. The preparation method comprises the following steps: by adopting titanium oxyhydroxide precipitate which is prepared by hydrolyzing tetrabutyl titanate by using KOH as a titanium source, sufficiently dispersing the titanium oxyhydroxide precipitate into an ammonium bismuth citrate solution, subsequently adding certain amount of potassium hydroxide as a mineralizer, sufficiently stirring and oscillating, transferring into a reaction kettle, sealing, and performing hydrothermal treatment for 6-48 hours at 150-300 DEG C, thereby finally obtaining the Bi4Ti3O12 single crystal nanosheets of which the thickness is about 100 nanometers and the two-dimensional size is greater than 1 micrometer. The invention provides the method for preparing the Bi4Ti3O12 nanosheets by using a hydrothermal method, ammonium bismuth citrate is adopted as a bismuth source for the first time, no other surface modifier is needed to be added, the Bi4Ti3O12 nanosheets with relatively good dispersity are prepared by precisely regulating and controlling the reaction condition, and the preparation process is simple and controllable.

The invention discloses a preparation method of a bismuth ferrite BiFeO3 monocrystal micrometer sheet, which comprises the steps of: with ferric nitrate and ammonium bismuth citrate as raw materials, adding deionized water and adding quantitative potassium hydroxide for promoting crystallization, and carrying out a hydrothermal reaction at a temperature of 160-240 DEG C to prepare the bismuth ferrite BiFeO3 monocrystal micrometer sheet. The preparation method has the advantages of simple process, easy control, no pollution, low cost, and easy mass production. The prepared bismuth ferrite BiFeO3 monocrystal micrometer sheet is stable in crystallization quality, and has a wide potential application prospect in fields such as a transducer, a sensor, a storage and photocatalysis.

The present invention relates to a kind of method for preparing flake Bi2WO6, comprising the following steps: 1) adding bismuth ammonium citrate solution to sodium tungstate solution dropwise; the molar concentration of said bismuth ammonium citrate solution is 0.20~0.60mol/L, The molar concentration of the sodium tungstate solution is 0.10~0.30mol/L; 2) continue to add the sodium hydroxide solution dropwise, carry out the hydrothermal reaction after mixing, filter and wash to obtain the flake Bi2WO6; the mole of the sodium hydroxide solution The concentration is 0.1~2mol/L. The flaky Bi2WO6 prepared by this method has good morphology and uniform size.

The invention provides a preparation method of a bismuth oxygen sulfur two-dimensional material and a photoelectric detector. The preparation method comprises the steps of 1, dispersing thiourea in deionized water, and adding ammonium bismuth citrate after the thiourea is completely dissolved by magnetic stirring; 2, adding potassium hydroxide after uniform stirring of a solution in the step 1, and performing stirring for 1-3 hours under a room temperature, wherein the concentration is 0.2-4.0mol/L; 3, transferring the stirred mixed solution to a polyphenylene reaction kettle resistant to hightemperature, and performing heat preservation for 3-48 hours under 25-220 DEG C; and 4, alternatively washing the product with two solvents comprising the deionized water or absolute ethyl alcohol, and performing alternative washing for 2-6 times so as to prepare a Bi2O2S two-dimensional material. The preparation method has the beneficial effects that the prepared Bi2O2S two-dimensional materialhas favorable photoelectric property, and the fabricated photoelectric detector has the characteristics of relatively high light dark current ratio, favorable cycle stability and the like.

A preparation method of a well-dispersed bismuth sulfide nanoparticle and graphene composite material comprises the following steps: dissolving graphene oxide, bismuth ammonium citrate and thioacetamide in water to prepare a mixed solution, conducting heating in a constant-temperature oil bath in an oil bath pan, so as to combine bismuth ions, sulfur ions and graphene oxide to form a graphene oxide and bismuth sulfide intermediate product, and synthesizing the bismuth sulfide and graphene composite material under the action of a reducing agent hydrazine hydrate. The bismuth sulfide nanoparticles on the graphene are uniform in particle size, the size is about 25 nm, the growth density and the particle size of the bismuth sulfide nanoparticles can be regulated and controlled by controlling the reactant concentration and the reaction time, and the experiment process is simple and effective. The invention not only provides an experimental thought for synthesizing the semiconductor nano composite material of the base graphene, but also can be widely applied to the fields of photoelectrons, catalysis, electrode materials and the like.

The invention discloses Bi2Ti2O7 ceramic powder and a preparation method thereof. The preparation method comprises the following steps: 1) dissolving bismuth citrate into a proper amount of ammonia water, and sufficiently stirring to obtain a colorless mixed solution; then dropwise adding tetrabutyl titanate into the mixed solution in an inert environment, so as to obtain a reaction solution; carrying out hydrothermal reaction on the reaction solution to prepare the Bi2Ti2O7 powder in one step. The product prepared by the preparation method has high purity, and a crystal shape is octahedral; the product can have excellent photocatalytic performance; the preparation method has the advantages of simplicity, moderate reaction conditions, low cost and good repeatability; requirements on synthesis equipment are low, so that the preparation method is suitable for being popularized and applied.

The embodiment of the invention discloses a preparation method of bismuth citrate. The method comprises the following steps: A, adding a bismuth nitrate solution into a citrate solution; B, reacting for 1 to 6 hours in a heat preservation manner at 60 DEG C to 80 DEG C; and C, washing and drying so as to prepare the bismuth citrate. The bismuth citrate is synthesized by one step by taking the bismuth nitrate solution and the citrate solution as raw materials, so that the process is simple and short in time; the reaction speed of the citrate solution is rapid, so that the yield of the bismuth citrate is high and the quality of the bismuth citrate is good; the consumption of the raw materials is decreased, so that the treatment cost of waste liquids is reduced; the reaction is thoroughly carried out, so that the obtained bismuth citrate is good; the difficult problem caused by the existing technology is avoided well.

The invention discloses a method for quantitatively detecting the concentration of bismuth in serum by inductively coupled plasma mass spectrometry. The method comprises the steps of firstly, nitrifying a beagle serum sample by adopting nitric acid, and detecting the content of bismuth in beagle serum by taking rhodium as an internal standard and adopting an inductively coupled plasma mass spectrometry (ICP-MS) method. The mass spectrometry detection parameters are as follows: the radio frequency power is 1550W; the pump speed is 40r.min<-1>; the temperature of an atomizing chamber is 2.7 DEGC; the sampling depth is 5mm; the cooling air flow velocity is 14L.Min<-1>; the auxiliary air flow velocity is 0.8L.min<-1>; and the atomized air flow velocity is 1.1L.min<-1>. According to the method, the linear relation of folic acid at 0.2-50ng/ml is good. The recovery rate of the method ranges from 101.1% to 103.4%; the accuracy in batches and the accuracy between batches are 91.9%-101.4%, andthe precision in batches and the precision between batches are 3.2%-10.5%. The method is low in limit of quantitation, short in analysis time and good in reproducibility, can meet the detection requirements of the concentration of bismuth in beagle serum, and can be used for pharmacokinetic research of colloidal bismuth citrate capsules.

The invention relates to a method for preparing Bi2WO6 nano-sheets. The method comprises the following steps: 1) dropwise adding an ammonium bismuth citrate solution into a sodium tungstate solution, wherein the mol concentration of the ammonium bismuth citrate solution is 0.2mol/L to 0.6mol/L, and the mol concentration of the sodium tungstate solution is 0.1mol/L to 0.3mol/L; 2) continually dropwise adding an NaOH solution and a PVA solution; after mixing, carrying out hydrothermal reaction; filtering and washing to obtain the Bi2WO6 nano-sheets, wherein the mol concentration of the NaOH solution is 0.1mol/L to 3mol/L, and the mol concentration of the PVA solution is 0.01mol/L to 0.1mol/L. The Bi2WO6 nano-sheets prepared by the method have a good appearance and a uniform size.

The invention discloses a Bi2O2CO3 nanocrystal with a unique morphology, and a preparation method thereof. According to the invention, bismuth citrate (C6H5BiO7) is adopted as a raw material; a dilute ammonia water solution is adopted as a solvent; and the hemispherical-structured Bi2O2CO3 nanocrystal composed of wound nano-sheets with curl edges is prepared with a hydrothermal method. The preparation method of the Bi2O2CO3 nanocrystal comprises the following steps: C6H5BiO7 is dissolved in the dilute ammonia water solution; the solution is subjected to a reaction in a reaction kettle; when the reaction is finished, washing is carried out, such that the hemispherical Bi2O2CO3 nanocrystal is obtained. The Bi2O2CO3 nanocrystal obtained through the reaction has a unique morphology and high specific surface area. With the Bi2O2CO3 nanocrystal, material performance can be effectively improved. In a photocatalysis performance test, the product obtained with the method shows good RhB catalytic degradation activity, which shows that the product has good application prospect in the respect of pollutant photocatalytic degradation.

The invention belongs to the technical field of complexe synthesis, and specifically relates to a bismuth citrate synthesizing method. The bismuth citrate synthesizing method comprises the following steps: dissolving a citric acid in water at a temperature of 45-48 DEG C; then adding bismuth oxide into the obtained mixture, and uniformly mixing the obtained product; carrying out atmospheric reaction on the obtained product for 20-24 hours at a temperature of 80-85 DEG C; and filtering, washing and drying the obtained reaction product so as to obtain white powdered solids, namely, bismuth citrate, wherein the molar ratio of the bismuth oxide to the citric acid to the water is 1:(3.5-4):(18-20). The method is performed under atmospheric pressure and low temperature conditions, the reaction conditions are mild, meanwhile, the product yield is high, and the quality of products is good.