309results about How to "Easy to recycle and reuse" patented technology

The invention discloses a making method of zinc oxide nanometer fiber as optical catalyst, which comprises the following steps: adopting zinc acetate as primer and fiber acetate as carrier; using organic solvent dimethyl formamide/acetone as co-solvent; adopting electrostatic spinning technique to make composite nanometer fiber film of zinc acetate/fiber acetate; dissolving in the 0.1N NaOH solution; washing; drying; sintering; obtaining the ZnO nanometer fiber film with diameter less than 100nm.

The invention belongs to the technical field of water treatment, and relates to mesoporous flower-shaped CeO2, a preparation method thereof and an application thereof as mimic oxidase to degrade wastewater containing reactive light yellow. The mesoporous flower-shaped CeO2 is a hollow type crystal consisting of a plurality of small particles with an average particle diameter of 214 nm. The preparation method comprises the following steps: firstly, by adopting CeCl3.7H2O as a cerium source, adopting urea as a precipitator and adopting PVP as a surfactant, preparing a CeO2 precursor under high pressure at a high temperature through a hydrothermal method; and roasting the precursor at a high temperature, thereby preparing a light yellow CeO2 nano material. According to the TMB chromogenic reaction, the prepared CeO2 has characteristics of mimic enzyme. The mesoporous flower-shaped CeO2 is used for reactive light yellow catalytic degradation reaction, so that the degradation rate of the reactive light yellow can be about 95% under the optimum proportion condition, and therefore, the mesoporous flower-shaped CeO2 has relatively good application prospects.

The invention discloses a method for preparing 1,3-diglyceride from a surface active magnetic nanoparticle immobilized lipase, which comprises the following steps of: (1) preparing a superparamagnetic ferriferrous oxide (Fe3O4) nanoparticle by coprecipitation performed on a mixture of divalent ferric salt and trivalent ferric salt; performing modification by a silane coupling agent; and activating the surface of the modified nanoparticle by glutaraldehyde to obtain a surface active magnetic nanoparticle; (2) adding a lipase solution, stirring, washing and drying to obtain the immobilized lipase; and (3) catalyzing glycerol to perform an esterification reaction with a fatty acid by adopting the immobilized lipase to obtain the 1,3-diglyceride. By utilizing the immobilized lipase disclosed by the invention, the activity, the operation stability and the regioselectivity are obviously improved in the synthetic reaction of the 1,3-diglyceride; the recycling operation of the lipase is greatly simplified; and moreover, the 1,3-diglyceride is high in purity and does not contain harmful solvents.

The present invention relates to a superhydrophobic sponge body and a preparation method thereof. A purpose of the present invention is to mainly solve the problem of poor hydrophobic effect of the existing adsorption recovery material. The technical scheme of the present invention comprises a superhydrophobic sponge body and a preparation method thereof, wherein the superhydrophobic sponge body comprises a sponge body and a nanometer modifier, the sponge body is a melamine sponge or a polyurethane sponge, and the nanometer modifier preparation method comprises: dissolving a nanometer material in a hydrophobic organosilicon compound agent, and stirring until completely dissolving so as to obtain the nanometer modifier. With the technical scheme of the present invention, the problem in the prior art is well solved. The preparation method of the present invention can be used in the preparation of superhydrophobic sponge bodies.

The invention discloses a method for preparing a cellulose composite sodium filter membrane, which comprises the following steps of: (1) dissolving cellulose or cellulose derivates into ionic liquid under a heating condition to obtain solution for preparing the membrane; (2) uniformly coating the solution for preparing the membrane on a non-woven fabric support and then soaking the support into a coagulating bath for coagulation to obtain a cellulose composite membrane; and (3) placing the obtained cellulose composite membrane into the solution of polyacid, poly-acyl chloride or poly-anhydride to perform crosslinking to prepare the cellulose composite sodium filter membrane. In the invention, the ionic liquid has high cellulose and cellulose derivates dissolving capability is used as the membrane-preparing solvent, so the membrane formation performance is high; and the ionic liquid can be recycled and repeatedly used. The crosslinked cellulose selective zone has high hydrophilism and selectivity, and the composite sodium filter membrane has a high flux and a high rejection ratio and can be widely applied in the separation and concentration of dyes, neutral particles, medicaments, food additives and the like.

The invention discloses a COF material-loaded transition metal catalyst, and a preparation method and application thereof. The COF material-loaded transition metal catalyst comprises a COF material and Pd<2 +> or Ni <2+> loaded on the COF material. The preparation method comprises the following steps: 1) mixing an aldehyde precursor, an amine precursor and absolute ethyl alcohol, carrying out a full reaction, and separating and purifying a reaction product to obtain a COF material; and 2) mixing the COF material, a soluble Pd salt or soluble Ni salt and dichloromethane, carrying out impregnation loading, and separating and purifying the obtained product. The COF material-loaded transition metal catalyst has the advantages of high catalytic activity, good selectivity, wide substrate application range, easiness in recycling, mild reaction conditions, usage of green and environment-friendly reaction solvents and the like when used for a semi-hydrogenation reaction of phenylacetylene compounds, and is simple in preparation process, easily available in raw materials and low in production cost.

The invention discloses a preparation method of a novel orientated silver ion doped titanium dioxide/graphene oxide composite material and application of the material in photocatalytic degradation. According to the method, graphene oxide-multiwalled carbon nanotubes are adopted as a carrier to perform functionalized modification on titanium dioxide on the surface of the carrier. The preparation method is characterized by comprising the following steps: adding ferroferric oxide, graphene oxide, multiwalled carbon nanotubes and tetrabutyl titanate according to a certain ratio to prepare magnetic titanium dioxide-graphene oxide-multiwalled carbon nanotubes, and further doping silver ions, thereby obtaining the magnetic titanium dioxide-graphene oxide-multiwalled carbon nanotube composite material in which silver ions are doped in an orientated manner. The catalyst has a remarkable degradation effect on polluted sewage of an azo structure, and has the advantages of being liable to separate, recycle and the like, and the degradation rate of the catalyst under visible light can be 90% or above.

The invention relates to a fiber/CNT(carbon nano tube)/TiO2 three-dimensional recyclable efficient catalytic material, as well as preparation and application thereof. A three-dimensional continuous structure is constructed on the surface of textile fiber by CNTs, and surfaces of the CNTs are loaded with nano TiO2. Preparation comprises: soaking fiber in a dispersion liquid containing CNT compound TiO2 and polyethylene glycol 2000, lasting reaction for 2-4 h at 60-80 DEG C, drying, washing with water, repeating processes of soaking, drying and washing with water for 3-5 times, and obtaining the material. The fiber/CNT/TiO2 three-dimensional recyclable efficient catalytic material is low in cost, the preparation method is simple, requirements on equipment is are low, and the operability is good; a water treatment agent provided by the invention can remove high-concentration organic pollutants in water, is suitable for advanced treatment of various wastewater, protects the environment, avoids secondary pollution, and has the advantages of being antibacterial, removing odor, absorbing other heavy metal ions, and the like.

The present invention relates to a superhydrophobic sponge body material and a preparation method thereof. A purpose of the present invention is to mainly solve the problem of poor hydrophobic effect of the existing adsorption recovery material. The technical scheme of the present invention comprises a superhydrophobic sponge body material and a preparation method thereof, wherein the superhydrophobic sponge body material comprises a sponge body and a nanometer modifier, the sponge body is a melamine sponge or a polyurethane sponge, and the nanometer modifier preparation method comprises: dissolving a nanometer material in a hydrophobic organosilicon compound agent, and stirring until completely dissolving so as to obtain the nanometer modifier. With the technical scheme of the present invention, the problem in the prior art is well solved. The preparation method of the present invention can be used in the preparation of superhydrophobic sponge bodies.

The invention provides a method for preparing a modified titanium dioxide nano particle nanotube. The method is characterized by comprising the following steps of: providing titanium dioxide nano sol; with chloroauric acid as a raw material, thiol as a surfactant and tetraoctyl ammonium bromide as a phase transfer agent, undergoing a reduction reaction under the action of thiol carboxylic acid and sodium borohydride so as to obtain modified golden nano sol; dispersing the modified golden nano sol and the titanium dioxide nano sol in an organic solvent respectively and then mixing to obtain titanium dioxide sol modified by the golden nano sol; and dropwise adding the titanium dioxide sol modified by the golden nano sol on the surface of an anodic aluminum oxide film, performing vacuum filtration, drying, calcining the composite anodic aluminum oxide film, removing the anodic aluminum oxide film, washing, and performing centrifugal separation to obtain the modified titanium dioxide nano particle nanotube. The modified titanium dioxide nano particle nanotube has a novel and stable structure, high specific surface area and excellent nano particle activity and is easily recovered and repeatedly used.

The invention relates to a method for preparing expanded graphite load nanometer bismuth vanadate photochemical catalyst, which comprises the following steps: 1 adding bismuthate and stabilizing agent into phosphate buffer, stirring for 15 to 60 minutes to form turbid liquid, dissolving metavanadate into the phosphate buffer uniformly, adding the phosphate buffer into the turbid liquid, and stirring the solution to be uniform to form transparent solution; and 2 regulating potential of hydrogen (pH) value through alkaline solution, adding expanded graphite at the temperature of 20 DEG C to 100 DEG C, stirring, mixing, refluxing for 6 hours to 24 hours, centrifuging, filtering, washing, finally roasting the obtained products, cooling and grinding to obtain the final product. The method is low in cost, easy to apply and good in maneuverability and has low requirements for devices. The obtained expanded graphite powder bismuth vanadate is even in self-assembly, can efficiently degrade durable toxic and harmful substances under conditions of ultraviolet light and visible light, can be recovered and recycled easily and conveniently and is very suitable for deep processing of waste water.

The invention relates to a catalyst which is relevant to zinc and titanium and a chemical method for preparing the catalyst. The zinc titanate micro-nano photocatalysis material has a spheroid structure with a plurality of protrusions. The preparation method of the zinc titanate micro-nano photocatalysis material comprises the following steps of: mixing uniform concentrated ammonia water suspension A of TiO2; slowly adding a zinc salt solution or ZnO powder into the suspension A in the titanium/zinc molar ratio of 1:1 to obtain uniform suspension B; processing the suspension B at high temperature and high pressure and then centrifugally washing the suspension B with deionized water many times to obtain a precursor C; drying the precursor C, burning at high temperature, and finally ball-milling. The prepared material has high specific surface area which reaches 160.6m2/g and has stronger visible light photocatalysis performance. The preparation method has low production cost and is suitable for scale industrial production.

The invention relates to a nano titanyl pyrophosphate photocatalyst and a preparation method thereof. The nano titanyl pyrophosphate photocatalyst comprises ultrafine powder of pure titanyl pyrophosphate. The preparation method is as follows: firstly dissolving inorganic titanium salt into water solution containing a surface active agent or dissolving titanate into an alcohol solvent containing the surface active agent so as to form solution A containing titanium; under stirring, slowly dropwise adding dilute alkaline solution into the solution A to obtain white or light-yellow oily suspension B; then under fast stirring, dropwise adding proper hydrogen peroxide solution to the suspension B to obtain white oily suspension C; and finally under fast stirring, slowly dropwise adding water solution of phosphoric acid, or phosphate or pyrophosphoric acid or pyrophosphate or alcohol solution of phosphoester, standing and aging, then carrying out ultrasonic cleaning and centrifugal separation to obtain white slurry, and after drying, roasting and carrying out ball milling to obtain white ultrafine powder of nano titanyl pyrophosphate with the particle size of 10-60nm.

The invention belongs to the technical field of new material preparation and relates to a preparation method of blocky hybrid aerogel which specifically refers to blocky aerogel fast prepared under the normal pressure condition and has an efficient removing effect on Cd2+ in waste water. The preparation method includes the steps that firstly, tetraethyl orthosilicate, deionized water, acetonitrile and an oxalic acid solution are measured and taken and are mixed, and the mixture is placed in a water bath kettle to react; after reaction, a beaker is taken out, 3-aminopropyltriethoxysilane is transferred into the beaker through a pipette when temperature returns to room temperature, and acetonitrile is added for aging after gelation; then gel is soaked in an acetonitrile solution containing isophorone diisocyanate and is placed in the water bath kettle for crosslinking; finally, acetonitrile is added, after standing performed under room temperature, the gel is sealed through a preservative film with needle holes and placed in a normal-pressure drying oven to be dried, and the silicon dioxide blocky hybrid aerogel is obtained. In the preparation process of the blocky hybrid aerogel, no solvent exchange or surface modification exists, consumed time is short, consumed energy is little, operation is easy, and the blocky hybrid aerogel has an efficient adsorbing effect on Cd2+ in waste water.

A comprehensive garbage sorting technology includes the steps of garbage grinding, bag breaking, magnetic separation, primary winnowing, two-grade sorting in a rotary screen and secondary winnowing. A comprehensive garbage sorting machine comprises a plate-type feeder, a garbage grinding and bag breaking machine and a magnetic separator are mounted in a feeding section and a discharging section of the plate-type feeder respectively, a first winnower and a first U-shaped belt conveyer are sequentially arranged below the discharging end of the plate-type feeder, the rotary screen comprising a first screening section and a second screening section is arranged at the rear end of the plate-type feeder, a first discharging hopper and a second discharging hopper are arranged below the first screening section and the second screening section of the rotary screen respectively, a second U-shaped belt conveyer and a third U-shaped belt conveyer are arranged below the two discharging hoppers respectively, a fourth U-shaped belt conveyer is arranged at the rear end of the rotary screen, and a second winnower is mounted below the discharging end of the rotary screen. The comprehensive garbage sorting technology and the comprehensive garbage sorting machine have the advantages that magnetic metal, building garbage, organic matters and the like in garbage can be sorted out step by step, thorough separation of various materials in household garbage is achieved, and recovery and utilization of useful materials are facilitated.

The invention relates to the technical field of chemical catalyzing, in particular to application of tungsten-based solid acid in lactic acid and lactate preparation using biomass and saccharides. Tungsten-containing salt is allowed to have hydro-thermal synthesis reaction with the chlorine salt, sulfate, nitrate, phosphate and oxalate of barium, calcium, lead, aluminum, chromium, erbium, tin, germanium, niobium and tantalum to prepare a multiple-component tungsten-based solid acid catalyst. The multiple-component tungsten-based solid acid catalyst is simple to prepare, cheap, good in hydrothermal stability, easy to recycle, capable of catalyzing monosaccharides such as fructose and glucose to convert into the lactic acid or lactate, capable of catalyzing polysaccharides such as sucrose, maltose, starch and cellulose even biomass such as wood and corn straw containing cellulose to have hydrolysis reaction so as to prepare the lactic acid or lactate, promising in application prospect and the like, multi-step reaction catalyzing by one single catalyst is achieved, and the range of the biomass and the saccharides which can be converted by the catalyst is wide.

The invention discloses a method for degrading organic wastewater by hydroxylamine hydrochloride reinforced iron oxide activated persulfate, and belongs to the technical field of water treatment. The method comprises the following specific steps: mixing hydroxylamine hydrochloride with wastewater to be pretreated; regulating pH (potential of hydrogen) to weak acidity; adding iron oxide and persulfate, and stirring at room temperature until reaction is complete; separating and recovering the iron oxide by adopting an external magnetic field to obtain purified wastewater, wherein proportion of organic matter to hydroxylamine hydrochloride to the iron oxide to the persulfate in the wastewater is 1 mmol: (5 to 10 mmol): 5mg: (10 to 30 mmol). A sulfate radical anion with strong oxidizing property is generated by the hydroxylamine hydrochloride reinforced iron oxide activated persulfate, therefore organic pollutants in a water body are removed. By adopting the method disclosed by the invention to remove the organic pollutants in the water, a removal rate can reach 70 percent to 99 percent in 30 minutes. The method disclosed by the invention is simple to operate, high in efficiency and low in operating cost, and has a broad application prospect in the field of advanced wastewater treatment.