Abstract:
본 발명은 극미량 시료 흡착량 측정 장치에 관한 것으로서, 수정기판에 전극이 형성된 QCM 센서와, 제1 내부공간 내에 QCM센서의 전극이 노출되게 장착되며 제1내부공간과 외부와 연통되는 인입구를 갖는 센싱 하우징과, 검사대상 시료가 장착되는 입력포트로부터 센싱 하우징의 상기 제1내부공간과 연통되게 인입구와 접속되어 메인유로를 형성하는 메인이송관과, 메인 이송관으로부터 시료가 분기되어 이송될 수 있게 메인유로로부터 분기된 적어도 하나의 분기관과, 분기관에 결합되어 유입된 시료가 체류할 수 있는 확산공간을 제공하는 확산벌브와, 분기관과 메인이송관 사이에 설치되어 시료의 이송경로 및 상기 제1내부공간으로의 이송량을 조정할 수 있도록 된 다수의 밸브와, 제1내부공간의 압력을 검출하는 압력검출부와, QCM 센서의 공진주파수� �� 검출하는 주파수 카운터와, 주파수 카운터의 출력신호와 압력검출부의 압력정보를 이용하여 QCM센서의 시료 흡착량을 산출하는 산출부를 구비한다. 이러한 극미량 시료 흡착량 측정 장치에 의하면 측정하고자 하는 시료에 대한 농도를 극저농도로 조절하면서 흡착량을 측정할 수 있는 장점을 제공한다.
Abstract:
본 발명은, 탄소코팅 이산화티탄분말에 관한 것으로써, a) 이산화티탄분말과 분자량이 100 ~ 5000인 탄소전구체를 혼합하여 혼합물을 제조하는 단계; 및 b) 상기 혼합물을 불활성기체의 공급 하에서 열처리하여 탄화층을 형성하는 단계; 를 포함하는 것을 특징으로 하는 탄소코팅 이산화티탄분말 제조방법에 관한 것이다. 본 발명에 의한 탄소코팅 이산화티탄 분말은 유기물의 광분해 반응에 효과적인 특성을 가진 광촉매로 사용할 수 있다. 보다 자세하게는 본 발명에 의한 탄소코팅 이산화티탄분말은 흡착과 산화성질을 동시에 제공할 수 있으며, 탄화층의 흡착용량증가로 인하여, 반응물의 농도에 의존하는 광촉매분해반응속도를 향상시킬 수 있다. 광촉매, 이산화티탄, 폴리비닐알콜
Abstract:
An activated carbon with ultra-high specific surface area which is prepared using corn, which has a specific surface area of 2500 m^2/g or more and an average pore size of about 2 nm, and in which a ratio of micropores to mesopores is controllable is provided, a method for preparing the activated carbon inexpensively and easily is provided, and various uses of the activated carbon including odor removal, water purification, natural gas adsorption, electric double layer supercapacitors, and catalyst carriers are provided. As a method for preparing an activated carbon with ultra-high specific surface area using corn grains, a method for preparing an activated carbon with a specific surface area of 2500 m^2/g or more using corn comprises the steps of: (A) drying and sorting raw material; (B) carbonizing the sorted raw material to a temperature of 500 to 1000 deg.C in an inert gas atmosphere; (C) mixing at least one activating agent selected from potassium hydroxide, sodium hydroxide, calcium carbonate, and zinc chloride with the carbide to activate the carbide, and controlling sizes of mesopores and micropores of the carbide while controlling content, activating time and activating temperature of the activating agent; and (D) cleaning and drying the size-controlled activated carbide. The step(B) is performed by carbonizing the raw material at 550 to 650 deg.C for 1 to 2 hours at a temperature rising rate of 5 deg.C/min. The step(C) is performed by activating the carbide at 700 to 1000 deg.C for 30 to 300 minutes using the activating agent to the carbide at a weight ratio of 1:1 to 5. The cleaning process in the step(D) is repeated until the cleaned carbide has a potential of hydrogen(pH) of 6 to 8.
Abstract:
PURPOSE: A device for measuring an absorption amount of a trace of a specimen is provided to measure an absorption amount while maintaining the concentration of a specimen desired to measure at ultra low concentration. CONSTITUTION: A device for measuring an absorption amount of a trace of a specimen comprises a QCM sensor(110), a sensing housing, a main transferring pipe(130), one or more branch pipes, a diffusion bulb, a plurality of valves, a pressure detecting unit, a frequency counter(190), and a calculation unit(195). The QCM sensor comprises an electrode formed on a crystal substrate. The sensor housing is installed in the inside of a first inner space so that the electrode of the QCM sensor is exposed. The sensor housing comprises an inlet. The first inner space and the outside are connected through the inlet. The main transferring pipe forms a main flow path by being connected to the inlet, thereby connecting to the first inner space of the housing from an input port where an inspection object specimen is installed. The branch pipes are branched from the main flow path. The diffusion bulb is joined to the branch pipes and provides a diffusion space where the specimen has flown can be stayed. The plurality of valves is installed in between the main transferring pipe and branch pipes, thereby controlling a transferring amount and a transferring passage of the specimen to the first inner space. The pressure detecting unit detects the pressure of the first inner space. The frequency counter detects resonant frequencies of the QCM sensor. The calculation unit calculates a specimen absorption amount of the QCM sensor by using input information of the pressure detecting unit and output signals of the frequency counter. [Reference numerals] (190) Frequency counter; (195) Calculation unit
Abstract:
PURPOSE: A manufacturing method of titanium dioxide coated with carbon to improve photocatalytic activity is provided to improve optical catalyst decomposition reaction speed depending on concentration of reactant due to increase of adsorption capacity of a carbonized layer. CONSTITUTION: A manufacturing method of titanium dioxide coated with carbon includes a step for manufacturing a compound by mixing titanium dioxide powder and a carbon precursor of molecular weight 100 ~ 5000, and a step for forming a carbonized layer by heat-treating the compound under supply of inert gas. The compound includes titanium dioxide powder 98 ~ 70 weight% and carbon precursor 2 ~ 30 weight%. The carbon precursor is starch, cellulose, polyvinyl alcohol or hydroxyl propyl cellulose.
Abstract:
A dye-sensitized solar cell using a copolymer binder including a hydroxy group and a carboxyl group and a manufacturing method thereof are provided to increase an open circuit voltage and short circuit current by using the copolymer. A relative electrode includes a light-transmitting material(10), a conductive light-transmitting layer(20), and a platinum layer(30). An optical electrode includes a copolymer binder comprising a hydroxy group and a carboxyl group, a mixture layer comprising a transition metal oxide, and a conductive light-transmitting layer. An electrolyte solution(50) is positioned between the relative electrode and the optical electrode. The copolymer binder comprising the hydroxy group and the carboxyl group is composed of a styrene-based monomer comprising a vinyl group, an acrylate-based monomer comprising the hydroxy group, and a methacrylic acid-based monomer including the carboxyl group.