Abstract:
본 발명은 분무열분해법을 이용한 광활성 특성이 개선된 스트론튬 티탄산 광촉매 입자의 제조방법에 관한 것이다. 본 발명에 따르면, 니켈(Ni), 탄탈럼(Ta) 및 란탄(La) 이 도핑된 스트론튬 티탄산 입자를 분무열분해법에 의해 제조함으로써 기존에 알려진 방법에 의해 제조된 입자에 비해 입자의 다공성도가 크게 증가하고, 수소 발생 속도가 현저히 증가한 광촉매 입자를 연속 공정에 의해 제조할 수 있다.
Abstract:
The present invention relates to a positive electrode active material for a lithium secondary battery in which metal is doped on lithium transition metal oxide. More specifically the present invention provides a positive electrode active material which has excellent high rate properties without the change of morphology, a production method thereof, and a lithium secondary battery including the positive electrode active material. [Reference numerals] (AA) Strength(a.u.); (BB) 2 θ(degree)
Abstract:
PURPOSE: Strontium titanate photocatalyst particles with improved optical activity property are configured to remarkably increase porosity of particles compared with particles produced by the conventional method and the generation speed of hydrogen and can reduce the induction period. CONSTITUTION: A manufacturing method of strontium titanate photocatalyst particles comprises the steps of: dispersing and dissolving metal including strontium, titanium and nickel elements to produce a metal precursor solution, forming a droplet with the use of the metal precursor solution, and heat treating the droplet to be converted into strontium titanate particles doped with nickel elements. [Reference numerals] (AA) Producing a precursor solution; (BB) Spraying liquid droplet; (CC) Conversing photocatalysis particles from liquid droplet
Abstract:
PURPOSE: A manufacturing method for a Zno(zinc oxide) transparent conductive thin film is provided to improve permeability by doping aluminum in an oxidation zinc thin film using a simple method. CONSTITUTION: Zinc salt and aluminum salt are added to a solvent. A precursor solution is produced from the added solvent. The produced precursor solution is sprayed with electricity on a substrate. Zinc oxide sprayed to with electricity is deposited on the substrate. The substrate deposited with the zinc oxide is heat-treated at temperatures of 300°C to 600°C.
Abstract:
PURPOSE: Nanostructures using a pelecypoda shell and manufacturing method are provided to make the separation and collection of the metal oxide 1D nanostructure easy and to enable the method to be used as the source technology of 1D nanostructure basic materials industries as the method of environment-friendly and low cost for the processing. CONSTITUTION: A method for manufacturing metal oxide 1 D(one-dimensional) nanostructure dips the metal oxide in a pelecypoda and treats by heating using the metal oxide as precursor. Heat treatment dips the metal oxide inside the pelecypoda and heat-treats at 500-900°C for 4~13 hours. Metal oxide includes one selected from the group consisting of tantalum(Ta), chrome(Cr), manganese(Mn), zirconium(Zr), arsenic(As), titania(Ti), tungsten(W) and molybdenum(Mo).
Abstract:
본 발명은 티타니아계 촉매의 제조방법에 관한 것으로서 보다 상세하게는 휘발성 유기물질 분해에 대한 높은 광촉매 활성을 가지는 수 마이크론 크기의 티타니아계 촉매의 제조방법에 관한 것이다. 본 발명은 분무 열분해 공정을 이용하여 수 마이크론 크기의 구형 티타니아 입자를 제조함에 있어서, 티타니아의 표면에 기공을 형성하기 위해 나노입자 크기를 가지는 열가소성 고분자를 첨가하여 표면적이 증가된 다공성의 티타니아 입자를 제조하는 방법의 제공을 목적으로 한다. 본 발명의 티타니아 또는 티타니아 복합산화물을 포함하는 다공성 티타니아계 촉매의 제조방법은 (1)티타니아 전구체를 산성수용액에 용해시키고 열가소성 고분자를 첨가시켜 티타니아 전구체 용액을 얻는 단계와, (2) 전기의 (1)에서 얻은 티타니아 전구체 용액을 액적화하는 단계와, (3)생성된 액적을 건조 및 열 분해시켜 미세 분말을 얻는 단계를 포함한다.
Abstract:
PURPOSE: Provided is a method for preparing colloidal crystal, which can produce colloidal crystal with uniform size in a large volume. Further provided are a method for preparing a porous structure using the colloidal crystal and an electrohydrodynamic spray system for performing the same method. CONSTITUTION: The method for preparing colloidal crystal comprises the steps of applying alternating current between a metal capillary tube containing suspensions and a ground electrode to induce uniform size of droplets, and forming colloidal crystals by removing solvent in the droplets, wherein the size of the droplet is controlled by changing frequency, intensity of electric field and/or flow rate of colloidal liquid in the capillary tube. The method for preparing a porous structure comprises applying alternating current between a metal capillary tube containing suspensions and a ground electrode to induce uniform size of droplets, forming colloidal crystals by removing solvent in the droplets, and sintering the colloidal crystal.