32results about How to "Low operational difficulty" patented technology

The invention discloses a preparation method of perovskite single crystals. The perovskite single crystals are CsPbBr3 perovskite single crystals or CsPb2Br5 perovskite single crystals, and the perovskite single crystals are in the shape of sheet or rod. A preparation method comprises the following steps: cleaning a single crystal growth substrate, wherein respectively carrying out ultrasonic treatment on the substrate for 15-30 minutes with acetone, 70%-80% ethanol and deionized water, taking out the substrate, and drying the substrate in a drying oven overnight to obtain a single crystal growth substrate; preparing a perovskite precursor solution, wherein dissolving CsBr and PbBr2 in hydrobromic acid or dimethyl sulfoxide according to the proportion of 1/1-1/4, controlling the concentration of CsBr to be 0.06 mol/L to 0.3 mol/L, the concentration of PbBr2 to be 0.06 mol/L to 0.3 mol/L, and obtaining a perovskite precursor solution; and preparing the perovskite single crystals, namelypreheating the perovskite precursor solution to 80-95 DEG C, dripping the perovskite precursor solution on the substrate, and removing the solvent to obtain the perovskite single crystals. The methodis simple to operate and low in operation process difficulty, and the components and morphology of the perovskite single crystals are adjustable.

The invention discloses an ultrasonic-based quick manganese-doped perovskite quantum dot preparation method. A manganese-doped perovskite quantum dot refers to Mn:CsPb(Br/Cl)3. The preparation methodincludes steps: (1) respectively dissolving PbBr2, Cs(AC) and MnCl2 4H2O into DMF to obtain reactant precursor solution; (2) sequentially dropwise adding the precursor solution of PbBr2 and Cs(AC) inthe step (1) into stirred oleic acid, n-octylamine and n-hexane mixed solution, wherein as reaction time grows, the solution becomes white emulsion, so that the CsPbBr3 perovskite quantum dot is prepared; (3) dropwise adding the MnCl2 precursor solution in the step (1) into the CsPbBr3 perovskite quantum dot solution prepared in the step (2) by a rate of 20-60 drops per minute, wherein the whole reaction is quickly transferred into an ultrasonic apparatus to carry out. The method is simple in preparation process and short in production period, the precursor solution is high in stability and reusable, and suitableness for industrial popularization is realized.

The invention discloses a preparation method of a perovskite micron-ring array which is a whole-inorganic CsPbX3 perovskite micron-ring array or a whole-inorganic CsPb(BrnAl-n)3 perovskite micron-ringarray, wherein X is one of chlorine ion, bromine ion or iodine ion, A is one of chlorine ion or iodine ion, 0 < n < 3. The preparation method includes the steps of: 1) production of a colloid single-layer template: spin-coating a substrate with a polystyrene microsphere suspension liquid to prepare the colloid single-layer template when water is evaporated out completely; 2) preparation of the perovskite micron-ring array: spin-coating the colloid single-layer template with a perovskite precursor solution, and when the coating is dried, soaking the template in methylbenzene to remove the polystyrene microspheres, and heating the template to form the perovskite micron-ring array. The method has simple operations and is low in operation difficulty. The size of the perovskite micron-rings and the emission wavelength of the perovskite micron-ring array are both adjustable.

A regeneration method for a liquefied gas thiol-removing alkaline solution comprising the following steps: performing an oxygenation reaction with respect to a liquefied gas thiol-removing alkaline solution and, at the same time, utilizing a high air-liquid condition to extract a disulfide and a polysulfide into a gas phase, thus completing the separation of the disulfide and the polysulfide from the alkaline solution, and implementing the regeneration of the liquefied gas thiol-removing alkaline solution.

The invention discloses a preparation method of an adjustable solid-state fluorescent carbon dot for an LED (light-emitting diode). The carbon dot is an anhydride-terminated carbon dot and has bright fluorescence in a solid state. The preparation method comprises the following steps: (1) preparing a carbon dot precursor solution: dispersing dithiosalicylic acid in a saturated acetic acid solution, and conducting ultrasonic dispersing uniformly; (2) preparing carbon dots: transferring the carbon dot precursor solution into a reaction kettle, conducting heating for reaction, conducting cooling to room temperature, conducting purifying, and conducting freeze-drying to obtain carbon dot powder; and (3) building an LED: fully mixing the carbon dot powder with polystyrene dissolved in toluene to obtain uniform mixed slurry, and coating an ultraviolet LED lamp bead with the mixed slurry, and conducting curing to obtain the carbon dot LED. The method disclosed by the invention is simple to operate and low in difficulty of an operation process, innovation is made on the basis of traditional carbon dot purification, the problem of fluorescence quenching of the carbon dots in a solid state is solved, and the carbon dots with good luminescence in the solid state are obtained.

The invention relates to a preparation method of a hydrophobic oleophylic adsorbent by taking towel gourd cotton as a raw material. The preparation method comprises the following steps: 1, taking towel gourd cotton as a raw material, soaking, cleaning and drying the material; 2, immersing the material in an alkaline solution for pretreatment, then adjusting the material to be neutral with an acid,and carrying out cleaning and drying; 3, immersing the material subjected to alkali treatment into a mixed solution of tetraethyl silicate, absolute ethyl alcohol and pure water, then adding a properamount of ammonia water, and then cleaning and drying with ethyl alcohol; and 4, immersing the material in a mixed solution of hexadecyl trimethoxysilane and pure water, adding a proper amount of acetic acid, cleaning with ethanol, and drying to obtain the modified adsorption material. Compared with the prior art, the adsorbent can be widely applied to petroleum leakage treatment and oily wastewater treatment, and the oil absorption material obtained through modification is high in adsorption rate, low in cost, biodegradable and free of secondary environmental pollution.

A ultrasonic oscillator unit including an ultrasonic oscillator array in which a plurality of oscillators are arranged in a circular-arc shape; an electrode part that is provided on at least one end surface of the plurality of oscillators perpendicular to a longitudinal direction thereof and that is electrically connected with the oscillators; a backing material layer that is disposed on a rear surface of the ultrasonic oscillator array; and a cable wiring part including a flexible printed wired board. The flexible printed wired board includes a cable connecting part that extends to a lower side of the backing material layer, is separated into a plurality of belt-like pieces, and has, in a comb shape, a plurality of strip-like electrode parts in which at least one electrode pad is linearly disposed in the longitudinal direction of each of the belt-like pieces.

The invention discloses a melting prevention method of vacuum-packaged salted pork in jelly. The method comprises the following steps: adding 0.65-2.0 parts by weight of TG enzyme to 75-150 parts by weight of a marinating soup before die-filling and molding, reacting at 35-65DEG C for 15-45min, carrying out water bath sterilization on a product obtained after molding at 65-90DEG C for 20-90min, and cooling the sterilized product in 0-10DEG C cold water for 30-60min. The total quantity of bacteria in the salted pork in jelly when the salted pork in jelly is stored for 30d reduces by two orders of magnitude; and the method has the advantages of increase of the elasticity and the chewiness of the salted pork in jelly, improvement of the slicing property of the salted pork in jelly, no influences on the flavor of the salted pork in jelly, and reduction of the saline taste.

A virtual object control method is described. A skill type of a skill is obtained in response to a first click/tap operation on a skill control. In response to determining that the obtained skill type of the skill is a target skill that supports selecting a casting position based on a screen click/tap, a castable region of the skill in a virtual scene is displayed according to a position where a controlled virtual object is located and a casting range of the skill. In response to a second click/tap operation in the castable region, the controlled virtual object is controlled to cast the skill at a casting position indicated by the second click/tap operation. Thus, a complex drag operation based on a wheel virtual joystick need not be performed, simplifying the operation of accurate aiming by a user. Apparatus and non-transitory computer-readable counterpart embodiments are also provided.

The invention provides a method for preparing an ITO film based on magnetron sputtering and etching treatment, and the method comprises the following steps: S1, rotating a substrate, and cleaning the surface of the substrate through clean water; s2, uniformly spin-coating polystyrene microspheres on the surface of the substrate; s3, performing oxygen plasma etching operation on the polystyrene microspheres to improve the sizes of the polystyrene microspheres; s4, sputtering an ITO target material on the surface of the substrate under a vacuum condition to form an ITO thin film, and depositing for a period of time; and step S5, putting the ITO film in a toluene solution for ultrasonic treatment so as to etch the polystyrene microspheres, and finally obtaining the ITO film, thereby realizing the preparation of the ITO film.

The invention discloses a method for simultaneously improving open-circuit voltage and stability of a full-suede perovskite/crystalline silicon laminated solar cell, and belongs to the technical field of solar cells. The solar cell is composed of a crystalline silicon bottom cell, a microcrystalline silicon tunneling composite layer and a perovskite top cell, a two-dimensional/three-dimensional perovskite bulk phase heterojunction light absorption layer of the perovskite top cell is prepared based on a vacuum-assisted two-step method, and in the first step, vapor deposition is carried out on lead iodide and cesium bromide at the same time through thermal evaporation vacuum deposition equipment; forming a layer of lead iodide and cesium bromide mixed inorganic compound film; and 2, coating the inorganic compound film with a ternary cation mixed organic ammonium salt solution of formamidine, guanidine and thiophene organic ammonium in a liquid phase manner. The introduction of guanidine cations can inhibit the migration of halide ions in the formamidino three-dimensional perovskite thin film and the in-situ formation of the thiophene organic ammonium-based two-dimensional perovskite at the grain boundary, thereby realizing the preparation of the high-performance full-suede perovskite/crystalline silicon laminated solar cell.

Provided is a synthesis process for the one-step production of a monomeric polyether for polycarboxylic acid water reducing agents, wherein the monomeric polyether is synthesized in one step by mixing an initator and a catalyst at a temperature and a pressure, and then introducing same into a reaction kettle together with an epoxide at a certain ratio for ring opening polymerization. The synthesis process of the present invention realizes continuous production without the need of first synthesizing a prepolymer and then synthesizing a macromolecular monomeric polyether step by step, thereby improving the production efficiency. By separating four links, i.e. displacement, polymerization, curing and neutralization, in conventional monomeric polyether production processes, the present invention more effectively controls each of the links and increases the utilization efficiency of the reaction kettle; in addition, the process is easy to control, the structure of the product is stable, and the retention of double-bonds is high.