287results about How to "Low reaction temperature" patented technology

The inferior gasoline hydrogenating modification process includes cutting the material gasoline at 60-90 deg.c into light fraction and heavy fraction; mixing the heavy fraction with hydrogen, reacting with hydrogenating and desulfurizing catalyst via contact, and reacting the effluent with aromatizing modification catalyst for aromatizing modification to obtain high octane number and low sulfur gasoline fraction; and mixing the modified heavy gasoline fraction with the light fraction or the light fraction after mercaptol eliminating pre-treatment to obtain the product gasoline. The said process makes the gasoline product possess S content not more than 150 ppm, olefin content not more than 20 %, arene content not more than 40 % and 1-3 unit raised RON.

The invention relates to a method for extracting vanadium by decomposing vanadium slag under normal pressure with sodium hydroxide solution. The method comprises the following steps of: adding vanadium slag or preprocessed vanadium slag, water and NaOH into a normal pressure reactor, wherein the mass ratio of NaOH to the vanadium slag is (2-6): 1, and the mass concentration of the sodium hydroxide solution is 65-90wt%; oxidizing in the presence of an oxidizing gas at the temperature 180-260 DEG C for 0.5-6 hours, and then diluting the obtained reaction sizing agent with diluent, thus mixed sizing agent containing sodium hydroxide, sodium vanadate, sodium chromate and slag tailing is obtained; and filtering and separating the mixed sizing agent at the temperature of 80-130 DEG C, thus the slag tailing and aqueous solution containing vanadium are obtained. The method provided by the invention has the advantages that the operating temperature is below the boiling temperature of solution, the process can be carried out under normal pressure, the operation is easy, and the safety is good; and the operating temperature is far less than the operating temperature of the traditional vanadium extracting process, the extraction ratio of vanadium is high, and the total vanadium content in the slag tailing is 0.5-1wt% (taking the weight of V2O5 as the basis).

A supported phosphor screen or panel suitable for use in radiation detectors has been described, as well as a method to prepare said screen or panel, comprising a phosphor layer wherein the phosphor layer has a main surface and edges, and further comprises, as an overcoat layer, a moistureproof protective layer, characterized in that the panel comprises a support with a surface larger than the said main surface of said phosphor layer, so that the said phosphor layer leaves a portion of said support free, and said overcoat layer covers at least a part of said portion of said support left free by said phosphor layer.

The invention relates to a method for preparing a water-soluble NaYF4 up-conversion luminescent material, which comprises the following steps of: (1) adding 1 to 30mmol of NaF solid into 3 to 20mL of ethylene glycol to obtain solution A; (2) adding 0.1 to 2g of polyvinylpyrrolidone into the 3 to 20mL of ethylene glycol, dispersing, and adding 0.05 to 5mmol of solid LnCl3 to obtain solution B; and (3) adding A into B, performing ultrasonic stirring for 30 minutes, transferring to a high pressure reactor, reacting at the temperature of between 140 and 240 DEG C for 1 to 48 hours, and centrifugally drying to obtain the water-soluble NaYF4 up-conversion luminescent material. The method has the characteristics of low reaction temperature, short reaction time, low requirement on equipment, no harm of byproducts, simpler operation, and easy industrialization; and the prepared material has the advantages of controllable crystalline phase, adjustable luminescence, and good application prospect.

The invention provides a preparation method of a sodium polystyrene sulfonate ion exchange resin, which comprises the following steps: (1) taking styrene as a monomer, divinylbenzene as a cross-linking agent, benzoyl peroxide as an initiator, polyvinyl alcohol as a suspending agent, methylene blue as an aqueous phase polymerization inhibitor and water as a reaction medium, and carrying out suspension polymerization reaction at 78-97 DEG C; and (2) adding copolymer in the step (1) in chloroform for swelling, adding sulfuric acid at 60-95 DEG C for sulfonation reaction to obtain a sulfonate hydrogen type resin, reacting the sulfonated hydrogen type resin and NaOH to convert into sodium type, then purifying and drying to obtain the spherical sodium polystyrene sulfonate ion exchange resin. The invention adopts chloroform to replace the traditional dichloroethane as a sweller, and has less damage to human health and environment and obviously lowered temperature of sulfonation reaction, and the prepared pharmaceutical bead ion exchange resin has small grain diameter, light color, high purity and less impurities and conforms to the requirements of United States and European pharmacopeia.

The invention discloses a preparation method of monodispersity micron-sized polysilicon microspheres which comprises the following steps: (1) adding deionized water and a basic catalyst in trialkoxysilane, and stirring in a nitrogen condition for hydrolysis; (2) centrifugally separating and filtering a mixed system in step (1) to remove unreacted monomers; and (3) adding the basic catalyst in a reaction system obtained from the step (2) for polycondensation, filtering, washing and drying to obtain the monodispersity micron-sized polysilicon microspheres. According to the method, the reaction temperature is low, the reaction can be conducted at room temperature, the synthesis steps are simple; the method does not use organic solvents which pollute the environment or emulsifiers in the reaction process, is simple in post treatment, less in types of raw materials, high in yield, and low in preparation cost, and can effectively adjust the grain size range of the microspheres to realize controllable sizes; and the obtained silicon microspheres are good in grain size uniformity and high in monodispersity, and has extremely good sphericity.

The invention discloses a method for preparing intelligent stress responding type silicon-boron polymer microgel, comprising the following steps of: stirring a prepolymerization reaction solution at 70-130 DEG C to react for 1-6h, continuously stirring after adding a bifunctional chain extender to react at 30-90 DEG C for 2-6h, and finally stirring after adding a functional modifier to react at 30-120 DEG C for 4-8h, to obtain the intelligent stress responding type silicon-boron polymer microgel. The prepolymerization reaction solution comprises: 75.0-96.5 wt. % low molecular weight polydiorganosiloxane, and 3.50-25.0 wt. % of boron-containing compound. The method for preparing the intelligent stress responding type silicon-boron polymer microgel has advantages of low reaction temperature and easy operation, has no need to introduce a catalyst, and is in favor of large scale production.

This invention relates to a process for fabricating ZnO nanowires with high aspect ratio at low temperature, which is associated with semiconductor manufacturing process and a gate controlled field emission triode is obtained. The process comprises providing a semiconductor substrate, depositing a dielectric layer and a conducting layer, respectively, on the semiconductor substrate, defining the positions of emitter arrays on the dielectric layer and conducting layer, depositing an ultra thin ZnO film as a seeding layer on the substrate, growing the ZnO nanowires as the emitter arrays by using hydrothermal process, and etching the areas excluding the emitter arrays, then obtaining the gate controlled field emission triode.

The present invention provides a liquid phase process for the acylation of aromatic compound by an acylating agent of the formula (R5R6R7)-Y-Z to obtain the corresponding acylated compound using a solid catalyst comprising a metal oxide of the formula AOx with or without a catalyst support, wherein A is a metallic element selected from Ga, In, Ti, Fe and a mixture of two or more thereof, and x is the number of oxygen atoms required to fulfil the valance requirement of A, wherein the catalyst is pretreated with a dry gas comprising a hydrogen halide in the presence or absence of the aromatic compound to be acylated, contacting the hydrogen halide pretreated catalyst with a liquid reaction mixture comprising the aromatic compound and the acylating agent, cooling the reaction mixture, removing the catalyst from the reaction mixture and then separating the reaction products from the reaction mixture.

The invention discloses a production method of producing active carbon with a high specific surface area by a composite activator. The production method comprises the following steps: (1) preparing the composite activator; (2) mixing a biomass material with the composite activator, and impregnating; (3) activating the impregnated material in a high-temperature tubular furnace for activating for 1 hour-2.5 hours, naturally cooling to the room temperature; and (4) washing an activated product by hydrochloric acid, cleaning by tap water, placing in an oven of 105 DEG C for drying until weight is constant to obtain the active carbon with the high specific surface area. The production method disclosed by the invention has the advantages that the active carbon is prepared by adopting the composite activator of zinc chloride and copper chloride. Compared with the conventional strong-base method for preparing the active carbon with the high specific surface area, the production method disclosed by the invention lowers application cost of the activator, lowers a reaction temperature for preparing the active carbon, and lowers corrosion on a device at the same time. Besides, production energy consumption and production cost are saved.

The present invention relates to a clean esterification method for producing dialkyl phthalate. It is characterized by that it adopts the ionic liquid formed from sulfonic acid group functionalized alkyl pyridine cation or sulfonic acid group functionalized 1,3-dialkyl iminazol cation or 2-oxopyrrolidine cation and organic or inorganic anion X as catalyst of reaction and reaction medium; at normal pressure its reaction temperature is 90-130deg.C and reaction time is 1-2hr, it can catalyze the esterification reaction of phthalic anhydride and isooctanol or n-octanol so as to obtain the invented dialkyl phthalate.

The invention discloses a method for preparing a catalyst capable of performing simultaneous desulfurization and denitrification on flue gas. First deionized water is utilized to dissolve a precursor of active component Fe2O3 and a precursor of a promoter, and an active component precursor solution is obtained; a well weighed activated carbon carrier is steeped at room temperature for 10-12 h through the active component precursor solution; the well steeped activated carbon carrier is placed in a drying oven at 110 DEG C to be dried for 12 h and is roasted for 3-5 h at 450-550 DEG C under the nitrogen protection, so that nitrate in the precursors is decomposed into an oxide; the precursors are taken out to be cooled to room temperature, and the catalyst capable of performing simultaneous desulfurization and denitrification on flue gas is obtained. The catalyst prepared through the method is suitable for simultaneous desulfurization and denitrification. Moreover, by pretreatment through nitric acid, the adsorption capacity of the catalyst is enhanced, catalytic activation centers are increased, and the reaction temperature can be reduced by presulfurization.

The invention provides a synthetic method of tazobactam acid, comprising the steps of (a) using 6-APA (6-aminopenicillanic acid) as a starting material and cetyltrimethylammonium hydrogensulfate as a catalyst to oxidize with oxone to obtain compound A; subjecting the compound A to deamination reaction to obtain compound B; esterifying the compound B to obtain compound C; (b) subjecting the compound C and 2-mercaptobenzothiazole to reduced pressure backflow to obtain compound D; ultrasonically vibrating the compound D and copper bromide to obtain compound E; reacting the compound E and 1H-1,2,3-triazole to obtain compound F; (c) allowing hydrogen peroxide and acetic anhydride to act on the compound F to obtain compound G; reacting the compound G with anisole to obtain tazobactam acid. Amino groups in 6-APA are diazotized directly, diazo groups are then removed, reduced pressure backflow and ultrasonic vibration are performed, hydrogen peroxide and acetic anhydride are used as oxidants, less byproducts are generated, and the yield and quality of tazobactam acid are effectively increased.

The invention relates to catalytic hydrolysis of chloro-fluoro alkane, particularly relates to a method for catalytic hydrolysis of freon and a device thereof. The device disclosed herein successively comprises a T-pipe, a U-shaped rector, a heat exchanger, and an absorption unit in the moving direction of freon and water vapor, wherein the T-pipe is connected with the U-shaped reactor, the U-shaped reactor comprises two sections, the outlet end of the U-shaped reactor is connected with the heat exchanger, and the outlet of the exchanger is connected with the absorption unit. Compared with the prior art, according to the invention, the decomposition rate of freon can reach to more than 95%, the reaction temperature is lower, the catalyst is cheap and easily available and has long service life, the product obtained by hydrolysis can be completely utilized without secondary pollution; the device has the advantages of simple structure, low cost, and high decomposition and absorption efficiency.

The invention discloses a raw material dispense prescriptions to synthesize carbofrax at low temperature and method, which comprises the following steps: making cane sugar, alcohol water solution, ferric nitrate, normal ethyl-silicones acid and acid catalyst as raw material dispense prescriptions; dissolving cane sugar into alcohol water solution; adding into ferric nitrate; dipping normal ethyl-silicones acid and acid catalyst; preparing carbofrax forerunner body xerogel; placing xerogel in vacuum graphite oven to carbon thermal reduction; preparing carbofrax; cooling model to room temperature; dealing several hours in the air; washing with mixed solution of fluohydric acid and azotic acid; washing; filtering; drying; getting purified carbofrax.

The invention discloses a small-particle-size ultrahigh-specific-area nano silicon oxide which is prepared by the following steps: adding metered inorganic acid, water glass, a nucleator, a dispersing agent and pure water into a reaction vessel, and emulsifying and stirring by high-speed shearing to perform primary reaction; added metered primary reaction product, inorganic acid and a nucleator into a reaction vessel, stirring at low speed to perform secondary reaction; regulating the pH value of the reaction product after secondary reaction to less than 3, and carrying out aging reaction under such conditions to stably form the particles; and carrying out deacidifying-desalting washing on the product under strong acid conditions to obtain the small-particle-size ultrahigh-specific-area nano silicon oxide. The particle size of the nano silicon oxide can reach 5-10nm, and the specific area is up to 600-1160 m<2>/g. The nano silicon oxide has small particle size and ultrahigh specific area, and thus, has excellent effects when being applied to multiple fields.

The invention provides a modified lithium titanate material and a preparation method thereof. The modified lithium titanate material is characterized in that a molecular formula of the lithium titanate material is LiaMpNqTixO12, wherein M and N in the molecular formula are doped and modified metal ions; a is equal to 4; p is more than 0 and less than 0.1; q is more than 0 and less than 0.1; p+q is more than 0 and less than or equal to 0.1; p+q+x is equal to 5; and the metal elements M and N respectively are one of La, Ce, Pr, Nd, Sm, Gd, Dy, Zr, Mn, Ta, Hf and V. The invention further provides a preparation method of the modified lithium titanate material. Compared with the conventional lithium titanate preparation method, the preparation method provided by the invention has the advantages that the reaction temperature is reduced, and the reaction time is reduced. Furthermore, the preparation process is simple; the preparation period is short; and the preparation method is applicable to industrial mass production. Moreover, the modified lithium titanate prepared by the method has the properties of good charging and discharging properties, good circulation property and high-rate property.

The invention provides barium-strontium titanate nanoparticles, which are coated with an aluminum-silicon composite oxide. The aluminum-silicon composite oxide contains Al2O3 and SiO2, and accounts for 1.0wt% to 10.0wt% the weight of barium-strontium titanate. The barium-strontium titanate nanoparticles have the following advantages: (1) the preparation temperature of the barium-strontium titanate nanoparticles is reduced to 80 DEG C, which is greatly lower than the preparation temperature (1100 DEG C) of barium-strontium titanate nanoparticles prepared by solid-phase synthesis; (2) ceramic materials with the particle size of 300nm to 500nm can be obtained to improve breakdown-resistant electric field intensity and dielectric performance; and (3) the medium energy storage ceramic material has stable dielectric constant under the action of an external high-voltage DC electric field, and so that the material is suitable for design and development of medium energy storage devices, such as capacitors.

The invention relates to modified bisphenol A-type epoxy resin and a preparation method thereof; the modified bisphenol A-type epoxy resin disclosed by the invention is a product obtained by reacting bisphenol epoxy resin and octadecanedicarboxylic acid under the effect of special catalyst; a carbon chain in a special structure is led into an epoxy resin molecule structure through the addition reaction of the modified bisphenol A-type epoxy resin and an epoxy group; the preparation method comprises the following steps: mixing epoxy resin and the octadecanedicarboxylic acid evenly; then, stirring a mixture under the protection of nitrogen while heating the mixture to 95-100 degrees centigrade; adding catalyst; keeping the reaction time of a reactant within 1.5-5 hours at a temperature when the temperature of the reactant reaches to 130-170 degrees centigrade; cooling the reactant; and discharging the reactant. According to the invention, the modified bisphenol A-type epoxy resin and the preparation method thereof have advantages of low reaction temperature, fast reaction speed, high yield, light color of the modified bisphenol A-type epoxy resin and good rigidity, toughness and chemistry resistance of modified curing epoxy resin.

The invention discloses a biomass-based carbon quantum dot and a preparation method thereof, belonging to the technical field of preparation of carbon quantum dot preparation. The preparation method comprises the steps of adding water to a husk material and an activator, mixing and drying to prepare a dipping sample; carbonizing the dipping sample to prepare a carbonized sample; adding water to soak the carbonized sample, filtering, adjusting the pH value of filtrate to be smaller than or equal to 3; and filtering and then dialyzing filtrate and carrying out freeze drying to prepare the biomass-based carbon quantum dot, wherein the activator is one or more of KOH, NaOH, K2CO3, KHCO3, Na2CO3 and NaHCO3. According to the biomass-based carbon quantum dot, the preparation process is simple, raw materials are environmentally friendly, cheap, and easily available, the prepared carbon quantum dot is small in size and uniform in particle size distribution.

The invention discloses an alkylation reactor and an alkylation reaction method. The reactor comprises a reactor tube body, closure heads, a revolving bed, a charging pipe, a charge distribution pipe, a discharging opening, a circulating cooling gas inlet, a circulating cooling gas outlet and heat pipe elements, wherein a closed shell body is formed by the reactor tube body and the closure heads, the revolving bed is arranged at the internal middle part of the shell body and is connected with a driving device through a revolving shaft, the charge distribution pipe is arranged at the center of the revolving bed and is communicated with the charging pipe, and the discharging opening is formed in the lower part of the shell body; a sealing member is arranged between the revolving bed and the shell body, the heat pipe elements are arranged at the outer side of the revolving bed and sequentially penetrate through the sealing member and the shell body, the heat pipe elements outside the shell body are sealed with a jacket, a refrigerant inlet and a refrigerant outlet are formed in the jacket, and the circulating cooling gas inlet and the circulating cooling gas outlet are formed in the shell body. According to the alkylation reaction method disclosed by the invention, alkylation reaction is carried out by taking concentrated sulfuric acid as a catalyst and taking isobutane and alkene as raw materials. According to the alkylation reactor and the alkylation reaction method, the alkylation reaction can be carried out at low temperature, the acid consumption is low, and the equipment scale is small.

The invention relates to a catalyst for producing 3-cyanopyridine and a preparation method and application thereof. Aiming at that the prior catalyst for producing the 3-cyanopyridine by ammoxidizing 3-methylpyridine has the disadvantages of higher service temperature and large energy consumption, the invention provides a catalyst which has low service temperature and small energy consumption and is used for producing the 3-cyanopyridine by ammoxidizing the 3-methylpyridine, and a preparation method and application thereof. A carrier of the catalyst adopts anatase TiO2, an active constituent adopts V2O5, and an auxiliary agent adopts one or more than one of transition metal oxide or alkali metal oxide; the method for preparing the catalyst comprises the following steps: the carrier, the active constituent and a predecessor of the auxiliary agent are weighed according to the mixture ratio, and are placed into an oxalic acid solution to be mixed evenly, the pH value of a mixed liquid is controlled, the mixed liquid is evaporated to obtain solid powder, and the solid powder is baked to obtain the catalyst. The catalyst is used for producing the 3-cyanopyridine by ammoxidizing the 3-pyridylamine in a gas phase.

This invention relates to method of removing N - nitroso Pendimethalin from herbicide Pendimethalin Ling. The invention takes FeCl2.4H2O as drawing off agent under concentrated hydrochloric acid presence. The process: dissolve Pendimethalin that containing certain amount of N - nitroso Pendimethalin in ethylene dichloride, then by whiping move the solution to three-necked bottle with condenser pipe, thermometer and whiping- heating arrangement. The weight ratio of crude Pendimethalin and ethylene dichloride is 1:1 to 10; add Concentrated hydrochloric acid, the weight ratio of Pendimethalin and Concentrated hydrochloric acid is 1:0.5 to 2.5, gradually heating-up to 75 deg and take reaction for 1 hour; then add FeCl2. 4H2O to the three-necked bottle, the weight ratio of FeCl2. 4H2O and crude Pendimethalin is 1:1 to 20, keep 75 deg for 3h. NN- NO compound content is less than 100ppm.

A synthetic method of di(trimethylsilyl)phosphite belongs to the technical field of compound synthesis. Trimethylchlorosilane and orthophosphorous acid which are adopted as raw materials undergo a reaction to obtain the di(trimethylsilyl)phosphite. The method comprises the following steps: placing orthophosphorous acid in methanamide, introducing nitrogen, stirring the orthophosphorous acid in methanamide for 15-20 min, adding the trimethylchlorosilane, simultaneously adding benzyltriethylammonium chloride and/or tetrabutylammonium hydrogen sulfate, continuously introducing nitrogen, controlling the reaction temperature to be less than 40 DEG C, and carrying out a one-step reaction to obtain the di(trimethylsilyl)phosphite. The synthetic method has the advantages of simplicity, easiness in operation, mild and stable reaction process, and high yield and high purity of the obtained di(trimethylsilyl)phosphite.

The invention discloses a method for preparing super capacitor electrode material, and relates to a method for preparing manganese dioxide/activated carbon fiber composite material. The method includes the steps of dissolving potassium permanganate and activated carbon fiber in deionized water to be stirred to be uniform, transferring a solution to a microwave hydrothermal reaction still, conducting microwave hydrothermal operation for 30 minutes to 180 minutes at a temperature of 60 DEG C to 120 DEG C, and washing away and drying away the deionized water to obtain the manganese dioxide/activated carbon fiber composite material. A one-step microwave hydrothermal reduction method is adopted, and therefore the reaction temperature is lowered, the synthesis time is shortened, the super capacitor electrode material good in performance is obtained, and the specific capacitance under the current density of 5 A/g reaches 109 F/g through testing after the capacitor is assembled.

The invention discloses composite oxide of transition metal and the preparing method thereof, and relates to thermoelectric material and the preparing method thereof; the invention solves the problems of high reaction temperature, long reaction time and easy impurity production of the prior Ca-Co-O system preparing method. The general formula of the composite oxide is Ca2-xMxCo2O5, wherein, M refers to Na, Ag, La or Bi. The method contains the following procedures: firstly, dissolving Ca(NO3)2*4H2O and Co(NO3)2*6H2O or Ca(NO 3)2*4H2O, the nitrate of M and Co(NO3)2*6H2O respectively into deionized water and the mixing according to the stoichiometric ratio of the molecular formula, pouring slowing citric acid solution and performing ultrasonic oscillation to produce homogeneous sol; secondly, heating for dehydration with microwave to get wet sol; thirdly, drying the wet sol to get dry sol and allowing self-propagating combustion; fourthly, baking after grinding. Compared with the prior art, the invention has the advantages of short reaction time, low baking temperature and simple operation. The powder of the material of the invention has uniform particle distribution and high purity; the powder has flaky structure, and the particle diameter is smaller than 200nm; the prepared bulk material is compact and has relative density of more than 85 percent.

The invention discloses a preparation method of a zinc silicate nanometer material. Amorphous nanometer silicon dioxide and soluble zinc salt are used as raw materials. The preparation method comprises the following steps: (A) weighing the amorphous nanometer silicon dioxide and the soluble zinc salt according to a stoichiometric ratio so as to prepare a suspended aqueous solution, regulating pH value of the suspended aqueous solution to 5-13, and stirring the suspended aqueous solution; (B) transferring the suspended aqueous solution in the step A into a hydrothermal reaction kettle and reacting the suspended aqueous solution at 160-230 DEG C for 2-24 hours; and (C) cooling a reaction system after the reaction is finished, and washing and drying a reaction product so as to obtain the zinc silicate nanometer material. The preparation method disclosed by the invention has the advantages of mild reaction, good reproducibility, simplicity in operation and the like; and the prepared Zn2SiO4 can be widely applied to the fields of fluorescent materials, catalytic degradation, adsorbing materials and so on.

The invention relates to a method for preparing negative temperature coefficient heat-variable powder body-the method of hydro-thermal chemical reaction. De-ionized water is added into reaction raw materials of manganous salt, nickelous salt, cobaltous salt and magnesium salt, the mixture is stirred sufficiently; an ammonia solution is added into the stirred reaction solution until the pH value of the reaction solution is between 8.0 and 12.0; the reaction solution is put inside a high pressure reaction kettle to perform the hydro-thermal reaction and then is subject to washing and baking so that the negative temperature coefficient heat-variable nano powder material is produced; the negative temperature coefficient heat-variable nano powder material is put into a blind roaster to be pyrolyzed at a temperature of between 600 and 900 DEG C for 2 to 8 hours, and the negative temperature coefficient heat-variable powder material is produced after sufficient grinding process. Compared with the ball milling method, the coprecipitation method and the sol-gel method, the method has the characteristics that the chemical compositions are even, the reaction temperature is low, the productivity is high, the synthesizing cycle is short, the reaction condition is controlled easily, and the inevitable agglomeration phenomenon in the sintering process is reduced, etc.

The invention discloses a method for preparing nitrogen-doped molybdenum disulfide nanosheets by a one-step method. The method comprises the following steps: (1) weighing a certain amount of ammonium molybdate tetrahydrate, thiourea and urotropine, dispersing the weighed ammonium molybdate tetrahydrate, thiourea and urotropine in a vessel containing deionized water, and carrying out thorough dissolving and dispersing under the action of ultrasonics and magnetic stirring; (2) transferring the solution obtained in the step (1) into a teflon-lined reaction kettle, carrying out heating in an airblast drying oven for a chemical reaction, stopping heating after a period of time of reaction, and naturally cooling the reaction kettle to room temperature; (3) after cooling the reacted solution to room temperature, centrifuging the reacted solution, collecting a synthesized black substance, and carrying out repeated washing with a mixed solution of deionized water and anhydrous ethanol; (4) subjecting powder, obtained after washing in the step (3), to vacuum drying in a vacuum drying oven until the powder is constant in weight, thereby obtaining the nitrogen-doped molybdenum disulfide nanosheets. According to the method, the cheap urotropine is adopted as a nitrogen source, the reaction temperature is low, the operation is simple, the traditional complicated method is broken through, the yield is high, the catalytic activity is good, and the performance is stable.

The invention relates to a method to make cyclohexanone by catalytic oxidation cyclohexanol that includes H₂O₂ as oxidant. The catalyst is Q_3+xPMo_12-xV_xO₄₀, of which x=1-3, Q represents quaternary ammonium positive ion or MH₄⁺. The invention avoids using noble metal as catalyst, has low reaction temperature, low reaction powder consumption. The invention almost has no pollution, and has good economic and social benefits.