Abstract:
The present invention relates to a surface-modified active carbon comprising tetrabutoxysilane combined with the surface of an active carbon, wherein a -Si-O-CH3 functional group and a -Si-OH functional group are included on the surface of the active carbon. According to the present invetion, decomposition efficiency is improved since prolonged residence is possible in a pollutant environment using the active carbon surface-modified with the tetrabutoxysilane, and a microorganism actively copes with an environment in a low concentration and high concentration base-based organic solvent, thereby showing a decomposition activity.
Abstract:
PURPOSE: A photoresponsible magnetic-cored dendrimer and a manufacturing method thereof are provided to be collected by magnetic separation after reaction. CONSTITUTION: A photoresponsible magnetic-cored dendrimer comprises recurring unit represented by chemical formula(1). In the chemical formula (1), MNP indicates magnetic nanoparticles, and n indicates integer of 1 or higher. The MNP is iron nano particle. The MNP (magnetic nano particle) is iron nano particle having crystalline form of magnetite(Fe3O4) or maghemite (γ-Fe2O3). The optical catalyst comprises optical response type magnetism center dendrimer including the recurring units of the chemical formula(1).
Abstract translation:目的:提供光反应性磁芯树枝状聚合物及其制造方法,通过反应后的磁选进行收集。 构成:光电磁芯树枝状聚合物包含由化学式(1)表示的重复单元。 在化学式(1)中,MNP表示磁性纳米粒子,n表示1以上的整数。 MNP是铁纳米颗粒。 MNP(磁性纳米颗粒)是具有磁铁矿(Fe 3 O 4)或磁赤铁矿(γ-Fe 2 O 3)结晶形式的铁纳米颗粒。 光学催化剂包括光学响应型磁中心树枝状聚合物,其包括化学式(1)的重复单元。
Abstract:
An analog to digital converter and an analog to digital converting method are provided to reduce power consumption and a chip size in comparison with the analog to digital converter comprised of a plurality of comparators comprised of pre-amplifiers. A reference voltage generator(10) generates a plurality of different reference voltages. A delay unit(20) changes a size of an analog input signal and the size and difference of a plurality of reference voltages into the delay time difference of an inputted clock. A phase detector(30) detects the delay time difference of the clock and generates the detection signal. A code generator(100) receives the detection signal and converts the detection signal into an N bit digital signal which increases as the analog input signal increases. The delay unit includes a first delay cell and a second delay cell. The first delay cell receives the clock and delays the clock as much as the first delay time according to the analog input signal. The second delay cell receives the clock and delays the clock as much as the second delay time according to the one reference voltage among the plurality of reference voltages.
Abstract:
A method for preparing a photocatalyst is provided to obtain a pure titanium oxide thin film and prepare an anatase type titanium oxide with excellent photocatalytic characteristics through rapid thermal annealing, and a photocatalyst prepared by the method is provided. A method for preparing a photocatalyst comprises the steps of: a) treating titanium with plasma of an electric power of 150 to 300 W at pressure condition of 7.5x10^-2 to 8.5x10^-2 mbar and a temperature condition of 25 to 350 deg.C to oxidize a surface of titanium to a thickness of 15 to 20 mum; and b) subjecting the oxidized titanium to rapid thermal annealing. The plasma treatment is performed by supplying a gas selected from the group consisting of oxygen, nitrous oxide(N2O), oxygen-containing air, and mixed gases thereof. The method comprises injecting the gas at the flow rate of 5 to 15 sccm(Standard Cubic Centimeter per Minute). The rapid thermal annealing is performed at 400 to 500 deg.C for 1 to 3 minutes. The titanium is in the form of a bulk or a thin film.
Abstract:
A reactive barrier for preventing diffusion of contaminants, which is economical and environmentally friendly, and prevents the contaminants from being eluted into water by removing contaminants such as trichloroethylene and nitrate accumulated on a bed and an embankment of a river or a lake, thereby reducing concentrations of the contaminants contained in soil, is provided. As a reactive barrier for preventing diffusion of contaminants, which is laid down on the contaminated deposit to prevent the contaminants from being discharged into water from a contaminated deposit(c) containing contaminants comprising trichloroethylene and remove the contaminants contained in water, the reactive barrier comprises: humus(10) accumulated on the contaminated deposit to adsorb trichloroethylene contained in the contaminated deposit and water; and zero-valent iron(20) impregnated in the humus to reduce the trichloroethylene contained in the contaminated deposit and water.