39results about How to "Wide adjustable range of parameters" patented technology

The invention provides a control preparation method of ordered titanium dioxide nanomaterials, comprising the following steps: forming a mixed solution with acid and deionized water; dropping a titanium source into the above mixed solution, and stirring vigorously while the titanium source is rapidly hydrolyzed. Mix uniformly; carry out hydrothermal reaction on the uniformly mixed suspension; after the reaction, the precipitated product is washed with distilled water and absolute ethanol, and then dried to obtain ordered titanium dioxide nanorod clusters, nanoflowers or nanospheres. The preparation method does not require any surfactant, and titanium dioxide nanostructures with different shapes and crystal forms can be successfully prepared only in an acidic environment; and the method has the advantages of simple process and process, wide adjustable range of parameters, and repeatability. Strong, low cost and other advantages.

The invention relates to a preparation method for controlling product crystal form and morphology of a titanium-based nanometer material. The method comprises the following steps: adding a liquid phase titanium source into a solution of hydrochloric acid or sodium hydroxide with a certain concentration, and rapidly stirring, so that the materials are uniformly mixed; adding the suspension into a stainless steel high-pressure autoclave with a polytetrafluoroethylene lining for carrying out a hydrothermal reaction; washing and drying the precipitation product after the hydrothermal reaction is ended, thereby obtaining a titanium dioxide or titanate nanometer material product in the high-pressure autoclave. The aim of controlling the product crystal form and morphology can be achieved by controlling the concentration of the solution of hydrochloric acid or sodium hydroxide. If the product is titanate, the product crystal form and morphology can be further controlled by virtue of an acid washing and roasting treatment method. The preparation method is simple and convenient in process and flow, the parameter adjustable range is wide, the repeatability is high, the cost is low, and various titanium dioxide or titanate products of different crystal forms can be prepared.

The invention relates to a method for preparing sheet-shaped graphene single / multiple-loaded precious metal nanoparticles. Add 0.5-2 mmol liquid-phase precious metal sources to an aqueous solution dispersed with 80-140 mg of graphene oxide, stir rapidly to make them evenly mixed; then add A reducing agent with a mass ratio of 5 to 15:1 to the precious metal, the volume ratio of the liquid-phase precious metal source to the total volume of the reaction solution is 5 ml / 100 ml to 30 ml / 100 ml; then the suspension is transferred to a suitable container for ultrasonic constant temperature Water bath; after the water bath is over, the precipitated product is washed and dried to obtain sheet-like graphene single / multi-loaded noble metal nanoparticles. The preparation method has simple process and process, wide adjustable range of parameters, strong repeatability and low cost, and can prepare various flake graphene composite materials loaded with different metal nanoparticles.

The invention discloses a method for preparing a silver-loaded titanate-zirconium phosphate composite nanometer material. The method comprises the steps of: firstly, adding titanate into deionized water to be dispersed, adding phosphoric acid; regulating pH using ammonia water, adding silver nitrate after uniform dispersion; stirring the resulting solution under a light-proof condition for 6-24 hours; adding an aqueous solution of zirconium salt, and further stirring the resulting solution under the light-proof condition for 2-8 hours; washing and drying a sediment product after the stirring operation is ended; and roasting the sediment product at the temperature of 500-1200 DEG C to obtain the target product silver-loaded titanate-zirconium phosphate composite nanometer material. The preparation method is simple and convenient in process and flow, wide in parameter adjustable range, strong in repeatability, low in cost, conductive to large-scale production, and has good business prospect.

The present invention relates to a porous monolith and its preparation method and application. The preparation method comprises the following steps: (1) dissolving a polymer in a solvent to obtain a first slurry; (2) adding an aqueous solution of MOFs to step (1) Among the obtained first slurry, the second slurry is obtained after the reaction; (3) The second slurry obtained in step (2) is sequentially subjected to thermal phase separation, solvent replacement and drying to obtain the porous monolith. The porous monolith provided by the invention has simple raw materials and low cost, uses organic polymers as the main raw material, and uses metal-organic framework grains as modified bodies to solve the problem of low selectivity and low efficiency of adsorbents in the oil-water separation process in the prior art. Low and so on.