Abstract:
The present invention provides a method for forming carbon coating. The method includes a step of heating lithium transition metal complex oxide presented by chemical formula 2, Li_(0.9+a)M_bM′_c N_dO_e, with a compound presented by chemical formula 1-1, C_nH_(2n+2-a)[OH]_a, where n is 1 to 20 and a is 0 or 1, or with a compound presented by chemical formula 1-2, C_nH_(2n), where n is 2 to 6 in an atmosphere of a gas mixture containing carbon oxide. According to the present invention, the compound presented by chemical formula 1-1 or the compound presented by chemical formula 1-2 is methane (CH_4), ethylene, propylene, methanol, ethanol, propanol, or a combination of those. The gas mixture additionally includes water vapor and inert gas selected from nitrogen, helium, argon, and a combination of those.
Abstract:
PURPOSE: Yttrium hydroxycarbonate which is modified with heterogeneous metal, a method for preparing the same, and a heavy metal adsorbent and a filter having same are provided to improve heavy metal adsorption and removal performance, and to selectively adsorb and remove heavy metal ions in the water while maintaining mineral. CONSTITUTION: Yttrium hydroxycarbonate which is modified with heterogeneous metal has a pore size of 10 nm or less. The heterogeneous metal is selected from transition metals, rare earth elements, alkali earth metal, and group 14 elements, and a combination thereof. The heavy metal adsorbent contains the heterogeneous metal-modified yttrium hydroxycarbonate and is an arsenic adsorbent. A method for preparing a solution containing an yttrium-containing salt and a heterogeneous metal-containing salt; a step of adding urea to the solution and preparing a mixture; a step of adjusting the mixture to pH 6-8 and preparing a precipitate; and a step of drying the precipitate. [Reference numerals] (AA) Comparative example 1; (BB) Example 1; (CC) Example 2; (DD) Comparative example 2; (EE) Pore volume(dV/dlogD, cm^3/g·nm); (FF) Pore size(nm)
Abstract:
PURPOSE: A regenerable filtering unit, a filtering device including the same, and a method for driving the filtering device are provided to overcome environmental pollution problems due to the scrapping of filters. CONSTITUTION: A regenerable filtering unit includes an electrode structure(10), a water purifying path(20), and a pH adjusting chamber. A cathode(12), a anion exchanging membrane(14), a cation exchanging membrane(16), and an anode(18) are successively arranged in the electrode structure. The water purifying path is formed at the cathode, between the cathode and the anion exchanging membrane, between the anode and the cation exchanging membrane, or at the anode. The water purifying path includes an absorbing function. The pH adjusting chamber is arranged between the cation exchanging membrane and anion exchanging membrane and adjusts the pH of the water purifying path. [Reference numerals] (AA) Introducing water; (BB) Treated water
Abstract:
PURPOSE: A regenerable filter device and a method for driving the same are provided to regenerate metal absorbing elements based on an electrochemical regenerating method without separate electrolyte. CONSTITUTION: A filtering device(10) includes a first electrode(12) and a second electrode(14). The first electrode is spaced apart from the second electrode. Either of the first electrode or the second electrode includes an electrode material layer with electric conductivity. The electrode material layer includes a filter unit(20) and a voltage applying unit(30). The filter unit includes a metal absorbing element. The voltage applying unit applies voltages to the first electrode and the second electrode for a pre-set period of time according to pre-set conditions after the filter unit operates. The metal absorbing element includes a basic functional group which is selectively bonded to metals.
Abstract:
PURPOSE: An electrolytic sterilization system for the water treatment and an electrolytic sterilization method using thereof are provided to increase the speed of the sterilization reaction inside the electrolytic sterilization system by increasing the temperature of inflow water. CONSTITUTION: An electrolytic sterilization system for the water treatment comprises the following: an electrolytic sterilizer(10) including a chamber(15), a first electrode(11), a second electrode(12), a water inlet unit(13), and a water outlet unit(14); and an inflow water heater(30) heating inflow water by being installed on the front end of the water inlet unit. The heating temperature of the inflow water heater is 20~70deg C. The inflow water heater uses a PTC thermistor heater, an electric heater, a gas heater, a heat exchanger, a warm water pipe, and waste heat.
Abstract:
A super-capacitor and an electrochemical device for cleaning water using the same are provided to enhance capacity by enhancing operation voltage of system and reduce volume of the complete system less than 1/2 and save a manufacturing cost by reducing forming materials including a current collector, a separation film etc. less than 1/2. A super-capacitor comprises: cathode; anode; a separation film interposed between the cathode and the anode; an electrolyte existing between cathode and anode and flowing current; a catalyst and binder having the pseudo-capacitor property. The catalyst reversibly makes one or more selected between hydroxyl and oxygen within the electrolyte oxidized and reduced.