44 results about "Selenourea" patented technology

A method for making a layered perovskite structure comprises: a) performing a vapor assisted surface treatment (VAST) of a substrate with a surface passivating agent; b) applying a layer of PbI₂ to the passivating agent; c) exposing the PbI₂ to methylammonium iodide (CH₃NH₃I) in an orthogonal solvent; and d) annealing the structure. A PEDOT:PSS coated ITO glass substrate may be used. The surface passivation agent may be one a chalcogenide-containing species with the general chemical formula (E₃E₄)N(E₁E₂)N′C═X where any one of E₁, E₂, E₃ and E₄ is independently selected from C1-C15 organic substituents comprising from 0 to 15 heteroatoms or hydrogen, and X is S, Se or Te, thiourea, thioacetamide, selenoacetamide, selenourea, H₂S, H₂Se, H₂Te or LXH wherein L is a C_n organic substituent comprising heteroatoms and X═S, Se, or Te. The passivating agent may be applied by spin-coating, inkjet-printing, slot-die-coating, aerosol-jet printing, PVD, CVD, and electrochemical deposition.

The invention discloses a quantum dot material and a preparation method, a quantum dot membrane, a backlight module and display equipment, belonging to the technical field of liquid crystal display. The preparation method of the quantum dot material comprises the following steps: (a) adding acetate of IIB-group element into a polyether ketone solution with side carboxyl, and stirring and mixing uniformly under the protection of inert gas, wherein the IIB-group element is cadmium or zinc; (b) heating the reaction system obtained in the step (a) to a preset temperature; and (c) adding selenourea or thiourea into the reaction system obtained in the step (b), and detecting the light wavelength of the reaction system, wherein the quantum dot material is obtained when the light wavelength of the reaction system reaches the preset wavelength. The growth of quantum dots is controlled by use of the coordination effect of carboxyl, then the quantum dots are uniformly dispersed in a polymer matrix, the luminous efficiency of the quantum dot membrane based on the quantum dot material is improved, the brightness of the backlight module is enhanced, and the development of high-gamut liquid crystal display equipment is facilitated.

The invention discloses a method for synthesizing self-assembled VSe2 nanosheets. The method comprises the steps: (1) performing pretreatment of carbon cloth; (2) weighing selenourea and a vanadium source, dissolving the weighed selenourea and vanadium source in 30 mL of a solution, performing magnetic and uniform stirring, and then putting the treated carbon cloth (CC) so as to obtain a mixed liquid; and (3) transferring the mixed liquid obtained in the step (2) to a 50 mL high-temperature high-pressure reactor with a para-polybenzene lining, then adding an ammonium fluoride morphology regulating agent to the reactor, sealing the reactor, and placing the sealed reactor in an oven for a hydrothermal reaction; and performing natural cooling to room temperature, taking the carbon cloth out,and performing rinsing and vacuum drying so as to obtain a self-assembled VSe2/CC nanosheet array self-supporting electrode. Through adoption of the hydrothermal method, the advantages of a simple process, a short preparation cycle and easily controllable reaction conditions are achieved, and the reaction process and the morphology and size can be controlled through adjustment of the temperature,so that multiple special morphology structures are obtained, and different morphological features have great influences on the properties of the material.

The invention provides a preparation method of CdSe/CdS core-shell structure quantum dots, which is characterized by comprising the following steps of: mixing a selenourea water solution and a normal heptane solution of alkyl carboxylic cadmium to obtain a first mixed solution, stirring the first mixed solution at 40-70 DEG C for reacting, and separating out CdSe quantum dots from an organic phase solution after the reaction; adding the CdSe quantum dots into the normal heptane solution of the alkyl carboxylic cadmium; and mixing the selenourea water solution and the CdSe quantum-containing normal heptane solution of the alkyl carboxylic cadmium to obtain a second mixed solution, and stirring the second mixed solution at 40-70 DEG C for reacting to obtain the CdSe/CdS core-shell structurequantum dots, wherein the normal heptane solution of the alkyl carboxylic cadmium consists of alkyl carboxylic cadmium, an organic cladding agent and normal heptane.

The invention provides a method for preparing a photocatalytic material from heavy metal ions in a biological adsorption solution. Based on a biological adsorption technology, the heavy metal ions in industrial wastewater are adsorbed and enriched onto biomass powder particles, then the biomass powder loaded with the heavy metal ions is subjected to a contact reaction with reagents (sodium sulfide, sodium hydrosulfide, thiourea, hydrogen sulphide or sodium selenide, sodium hydrogen selenide, selenourea, hydrogen selenide and the like ) which can provide an S<2-> or Se<2-> source, so that the heavy metal ions adsorbed on the biomass powder particles are in-situ converted into corresponding metal sulfides (selenides). The method realizes a new way of high-valued utilization of various industrial wastewater containing low-concentration valuable metal ions, reaches purposes of economically and efficiently removing the low-concentration metal ions in the industrial wastewater in virtue of biological adsorption, has the highlight advantages of being fast to adsorb, low in cost, short in powder making flow, large in yield, and easy to scale.

The invention provides a special selenourea slow-release composite fertilizer for rice. The fertilizer is prepared from, by weight percentage, urea, potassium chloride, monoammonium phosphate, sodium selenite pentahydrate, water and ash. The slow-release composite fertilizer further comprises synergist and a dispersion agent. A preparation method includes the steps that formaldehyde is conveyed into a urea melting tank, and sodium selenite pentahydrate is added for reaction to generate a selenourea formaldehyde chelate solution. High-temperature selenourea formaldehyde chelate is sprayed into mist from top to bottom and enters a cylinder granulation device, synergist and the dispersion agent are sequentially heated to 50-80 DEG C, then enter the cylinder granulation device of a fluidized bed and are mixed with smashed blocky fertilizer to form selenourea formaldehyde fertilizer particles, and the special selenourea slow-release composite fertilizer for rice is obtained. The fertilizer is scientific in ratio and comprehensive in nutrient, can gradually and continuously provide nutrients for rice crops, can make nutrients fully absorbed by rice, remarkably promotes rice growth, and remarkably increases the utilization rate of the fertilizer.

The invention discloses an N-difluoromethylazole sulfur (selenium) urea derivative and a preparation method thereof. The N-difluoromethylazole sulfur (selenium) urea derivative comprises N-difluoromethyl benzimidazole sulfourea, N-difluoromethyl imidazole sulfourea, N-difluoromethyl triazole sulfourea and an relevant N-difluoromethyl selenourea derivative; and a benzimidazole derivative, an imidazole derivative or a triazole derivative, elemental sulfur powder or selenium powder, and a catalyst are added into a reaction tube, an organic solvent is added into the reaction tube, halohydrocarbonis injected into the reaction tube, and reacting is carried out under a heating condition to obtain the N-difluoromethylazole sulfur (selenium) urea derivative. The preparation method is simple and easy to operate, the condition is mild, the cheap and economical effects are achieved, and the provided compounds have important potential application value in pesticides, medicines and organic functional materials.

The invention discloses an N-difluoromethyl azole selenourea derivative or an agricultural pharmacology acceptable salt and application thereof. The structure of the N-difluoromethyl azole selenoureaderivative is shown as a general formula (I) or a general formula (II), and the definition of each substituent group in the formulas is shown in the specification. The compound shown in the general formula (I) or the general formula (II) shows insecticidal activity on pests in agriculture and forestry and other fields, and meanwhile, the compound shown in the general formula (I) or the general formula (II) is used as an insecticide, namely, the compound shown in the general formula (I) or the general formula (II) is used for preparing drugs for preventing and controlling pests in agriculture and forestry or other fields. The compound particularly has excellent insecticidal activity on Lepidoptera chewing mouthpart pests such as Plutella xylostella, Spodoptera frugiperda, Spodoptera exiguaand Spodoptera litura.

The invention discloses a chiral compound with a selenourea group structure, and also provides a preparation method and application of the selenourea chiral compound. The structure of the new compound is shown as the specification. The compound is used as a chiral shift reagent to detect the optical purity of chiral carboxylic acid, chiral alcohol, chiral amino alcohol and other chiral compounds, has the characteristics of simple operation and large chemical shift difference, thus being a rapid, efficient, convenient and practical detection means.

The invention discloses a method for preparing a 5-aminotetrazole compound. The method comprises the following steps: adding bis-substituted selenourea shown in the formula II in the description, ionic liquid loaded iodobenzene diacetate shown in the formula III in the description, sodium azide and alkali A into a solvent B, stirring at -10 to -80 DEG C and conducting cyclization reaction, and after the reaction is finished, conducting aftertreatment on the reaction liquid to prepare the 5-aminotetrazole compound shown in the formula I in the description. Compared with the conventional method, a green reagent, namely, ionic liquid loaded iodobenzene diacetate, is adopted, so that the use of heavy metal is avoided, the operation is simple and convenient, and the reaction yield is high.

The invention provides a novel mercury ion fluorescent probe based on rhodamine B as well as a preparation method and application thereof. The structural formula of the novel mercury ion fluorescent probe based on rhodamine B is shown in the specification, and the preparation method comprises the following steps: preparing rhodamine B acyl chloride by adopting rhodamine B; carrying out a reactionbetween the obtained rhodamine B acyl chloride and N,N-dimethyl selenourea in a solvent containing triethylamine; removing the solvent through reduced pressure distillation, and carrying out extraction, rotary evaporation and column chromatography separation to obtain the novel mercury ion fluorescent probe based on rhodamine B. According to the invention, rhodamine B is used as a fluorescent group and N,N-dimethyl selenourea is used as a recognition group to synthesize a novel mercury ion fluorescent probe based on rhodamine B, which has strong selectivity to mercury ions and high sensitivity, and strong anti-interference capability to other metal ions, can be used as a basis for qualitative and quantitative detection of Hg<2+>, and is widely used for detection and in-situ online quantitative analysis of mercury ions.

The invention discloses a preparation method of a monoclinic-phase GeSe2 nanocrystalline and a semiconductor material prepared from the monoclinic-phase GeSe2 nanocrystalline. With GeI4 as a germanium source, selenourea as a selenium source and oleylamine as a solvent, the cerebriform ellipsoidal monoclinic-phase GeSe2 nanocrystalline is obtained by use of a one-pot method. According to the preparation method of the monoclinic-phase GeSe2 nanocrystalline, the GeSe2 nanocrystalline uniform in dimension and good in dispersibility is synthesized under normal pressure and at a relatively low temperature; the reaction conditions are mild, the operations are simple, and the nano GeSe2 is synthesized conveniently and quickly. The monoclinic-phase GeSe2 nanocrystalline prepared by use of the preparation method is a novel photoelectrochemical (PEC) active material with excellent properties, and the PEC active material is good in photoresponse signal, good in stability, and has an application prospect in photoelectrochemical biosensor construction.

The invention discloses a preparation method of a germanium selenide nano material and application of the germanium selenide nano material. The preparation method of the germanium selenide nano material comprises the following steps of: mixing GeI4 and oleylamine, and sequentially carrying out magnetic stirring, vacuumizing, heating and heat preservation; and injecting selenourea into the mixture of GeI4 and oleylamine, refluxing the reaction mixture at a high temperature in an inert gas environment, cooling to room temperature, washing with acetone, alcohol and deionized water in sequence, and drying to obtain germanium selenide nanoparticles. According to the preparation method of the germanium selenide nano material, selenourea and GeI4 are subjected to a redox reaction in an oleylamine solvent at a high temperature to synthesize germanium selenide nano particles, the germanium selenide nano particles are cooled to room temperature, washed with acetone, alcohol and deionized water and dried to obtain the germanium selenide nano particle material, and the whole preparation method is simple to operate, environment-friendly, pollution-free and easy for industrial production. The germanium selenide nano material disclosed by the invention is applied to degradation of organic pollutants.

Gold(I)-carbene complexes having a selenium donor ligand with anti-cancer activity and a method of treating cancer. Methods of treating cancer comprising administering the complexes are also provided.

The invention provides a purification agent applied to treatment of automobile exhaust and a preparation method thereof. The purification agent comprises a carrier and a coating coated on the carrier, wherein the coating is prepared from the following raw materials: calcium aluminate, hafnium hydroxide, praseodymium oxide, tin-doped zinc oxide, 2,2,4-trimethyl-1,3-pentanediol isobutyrate, potassium gadolinium tungstate, selenourea, graphene oxide, silver loaded zeolite powder, pseudo-boehmite, carboxyl modified silicon dioxide, methylcellulose, shell powder, tourmaline powder, ferric phosphate, cerium molybdate, titanium cyanide, carbon molecular sieve-220 and additives. The purification agent is excellent in purification effect on the automobile exhaust; the treated automobile exhaust is obviously lower than the state-specified emission limit standard; in addition, the purification agent applied to treatment of the automobile exhaust is simple in preparation process and low in cost, and is extremely suitable for large-scale production and application.

The invention discloses a method for determining the form content of selenium in vegetables. According to the method, seven selenium forms and contents of selenocystine, methyl selenocysteine, selenourea, selenomethionine, selenoethionine, selenite radicals and selenate radicals in a sample to be detected are tested by using an ion pair reversed-phase high-performance liquid chromatography-ultraviolet-hydride generation-atomic fluorescence spectrometry. According to the determination method disclosed by the invention, iodoacetamide is added in inorganic selenium extraction, so a problem of poor recovery rate of selenite radical analysis and test in HPLC-HG-AFS is solved; pretreatment operation is fast and simple, the required types and dosage of protease are few, reagent cost is low, the sample extraction rate is high, and sensitivity and the separation degree of the selenium form HPLC-HG-AFS analysis method are greatly improved; contents of seven selenium forms can be simultaneously analyzed and determined at one time, and the instrument analysis and test time is short.

A platinum(II) complex of formula (I),