Abstract: An apparatus for producing a natural gas using carbon dioxide and water in air that includes an air-compressing member, a water collecting member, a water storing member, a carbon dioxide collecting member, a water electrolysis member, and a methanation reaction member. The water electrolysis member electrolyzes water separated from compressed air. The methanation reaction member generates a natural gas by reacting hydrogen from the electrolysis and carbon dioxide from the carbon dioxide collecting member. A method of producing a natural gas using carbon dioxide and water in air includes supplying hydrogen electrolyzed from water separated from air and carbon dioxide collected from the dry air to a methanation reaction member to generate a natural gas. A natural gas-synthesizing equipment system includes an apparatus for producing a natural gas using carbon dioxide and water in air.

Abstract: An apparatus for producing a natural gas using carbon dioxide and water in air that includes an air-compressing member, a water collecting member, a water storing member, a carbon dioxide collecting member, a water electrolysis member, and a methanation reaction member. The water electrolysis member electrolyzes water separated from compressed air. The methanation reaction member generates a natural gas by reacting hydrogen from the electrolysis and carbon dioxide from the carbon dioxide collecting member. A method of producing a natural gas using carbon dioxide and water in air includes supplying hydrogen electrolyzed from water separated from air and carbon dioxide collected from the dry air to a methanation reaction member to generate a natural gas. A natural gas-synthesizing equipment system includes an apparatus for producing a natural gas using carbon dioxide and water in air.

Abstract: A method for preparing a thin or thick film, including the aligning non-spherical seed crystals on a flat portion of at least one surface of the substrate such that an a-axis, a b-axis, and/or a c-axis are oriented according to a certain rule; and exposing the aligned seed crystals to a solution for enabling the growth of the seed crystals to thereby form and grow a film from the seed crystals using a secondary growing technique.

Abstract: The present invention relates to an iodine (I2) or bromine (Br2) adsorbent including a zeolite having a Si/Al ratio of 15 or greater; an I2 or Br2 carrier including the I2 or Br2 adsorbent; a column filled with the I2 or Br2 adsorbent; a article composed of the I2 or Br2 adsorbent or having the I2 or Br2 adsorbent attached thereto; a method for adsorbing or removing I2 or Br2 using the I2 or Br2 adsorbent; an iodine- or bromine-containing zeolite composite including a porous zeolite and iodine (I2) or bromine (Br2) confined in the pores of the zeolite; a semiconductor material including the iodine- or bromine-containing zeolite composite; and a method for preparing an iodine- or bromine-containing product using the iodine- or bromine-containing zeolite composite.

Abstract: Provided is a method of arranging particles on a substrate, the method including: (a) preparing a substrate, a surface of which has depressions or projections capable of fixing the positions and/or orientations of one or more particles; and (b) placing the particles on the substrate and applying a physical pressure to the particles so that a portion or the whole of each particle is inserted in each of pores defined by the depressions or the projections. Provided is also a method of arranging particles on a substrate, the method including: (a) preparing a substrate, at least a surface portion of which has adhesive property; and (b) placing particles, which do not have flat facets but curved surfaces, on the substrate and applying a physical pressure to the particles so that the particles are immobilized on adhesive surface portions of the substrate.

Abstract: The present invention provides a method for manufacturing a bowl-shaped structure, a bowl-shaped structure manufactured thereby, and a bowl array using the bowl-shaped structure, wherein the method for manufacturing the bowl-shaped structure comprises the following steps: putting into contact a first substrate, on which a particle alignment layer is formed, and a second substrate so as to transfer the particle alignment layer to the second substrate; forming a particle-thin film complex by coating the particle alignment layer that is transferred on the second substrate with a thin film formation substance; removing a portion of the thin film formation substance from the complex to expose particles, and then removing the exposed particles to form a template having a hole; and forming the bowl-shaped structure by coating a first substance on the surface of the hole of the template and then removing the template.

Abstract: Provided are a method for preparing a thin film or a thick film, including: a first step of providing a porous substrate capable of supplying silicon; a second step of applying zeolite seed crystals onto the surface of the porous substrate; a third step of coating the seed crystals-applied porous substrate with an aqueous solution containing a structure-directing agent; and a fourth step of forming and growing a film from the seed crystals by the secondary growth above a temperature at which moisture inside the seed crystals-applied porous substrate prepared in the third step can form steam, and a film prepared by the method. The film manufacturing method of the present invention is a simple manufacturing process, and thus has high reproducibility and high throughput. Since a synthetic gel is not used and a solution is used, the unnecessary consumption of materials, environmental pollution, and waste of a synthetic gel can be prevented while not necessitating drying and washing of a film.

Abstract: The present disclosure relates to a preparing method of a zeolite core/silica zeolite shell composite, which includes adding a zeolite seed crystal into a gel solution containing a silicon-source compound, a structure directing agent and a fluorine anion-source compound, and then, crystallizing the gel solution for growing a silica zeolite shell containing a crystal structure which is coherent with that of the zeolite seed crystal; a zeolite core/silica zeolite shell composite prepared by the preparing method above; and catalytic use of the zeolite core/silica zeolite shell composite.

Abstract: A method for preparing a thin or thick film, including the aligning non-spherical seed crystals on a flat portion of at least one surface of the substrate such that an a-axis, a b-axis, and/or a c-axis are oriented according to a certain rule; and exposing the aligned seed crystals to a solution for enabling the growth of the seed crystals to thereby form and grow a film from the seed crystals using a secondary growing technique.

Abstract: A synthetic gel for crystal growth, which induces only secondary growth from the surface of a silicalite-1 or zeolite beta seed crystal and cannot induce crystal nucleation in the synthetic gel for crystal growth or on the surface of the seed crystal. The synthetic gel contains fumed silica, tetraethylammonium hydroxide (TEAOH), [(NH4)2SiF6], KOH, and H2O, or contains tetraethylorthosilicate (TEOS), tetraethylammonium hydroxide (TEAOH), hydrogen fluoride, and H2O.

Abstract: The present invention relates to a novel method for producing titanium dioxide particles, and titanium dioxide particles produced thereby, and more specifically, to a novel method for producing titanium dioxide particles capable of producing titanium dioxide particles having uniform particle size through chemical reaction at a temperature equal to or lower than room temperature and can easily control the size of titanium dioxide particles, and titanium dioxide particles produced thereby, having a uniform particle size.

Abstract: Manufacturing a particle may include inserting a supporting body into a receiving groove on a first substrate to accommodate a first surface of the supporting body into the receiving groove and to expose a second surface of the supporting body to outside; forming a first coating layer on the second surface; attaching a second substrate to the supporting body on which the first coating layer is formed; exposing the first surface of the supporting body on which the first coating layer is formed to outside, by separating the supporting body on which the first coating layer is formed and which is attached to the second substrate from the first substrate; forming a second coating layer on the first surface of the supporting body; and separating the supporting body, on which the first coating layer and the second coating layer are formed, from the second substrate.

Abstract: The present disclosure relates to a novel method of preparing a vanadosilicate molecular sieve, and a vanadosilicate molecular sieve and their derivatives prepared by the same method. The preparing method of a vanadosilicate molecular sieve includes forming a vanadosilicate molecular sieve by a hydrothermal reaction of a reaction mixture containing a silicon source, a base, a V5+-containing compound as a vanadium source, a reducing agent, a salt and water.

Abstract: The present disclosure relates to an apparatus for a reduction reaction of carbon dioxide using solar energy and a reducing method of carbon dioxide for reacting carbon dioxide gas and hydrogen gas with each other by using solar energy.

Abstract: The present invention provides a method for preparing a thin or thick film, comprising the steps of: (1) arranging non-spherical seed crystals on a substrate such that all the a-, b- and c-axes of each seed crystal are oriented under a predetermined rule; and (2) forming and growing the film from the seed crystals through secondary growth by exposing the arranged seed crystals of step (1) to a seed crystal growth solution. The invention also provides a film prepared by the method. According to the invention, crystals or films larger than the seed crystals can be prepared.

Abstract: The present application relates to a method for dispersing quantum dots (QDs) or quantum wires in zeolite, to zeolite containing quantum dots or quantum wires dispersed by the method, and to a method for stabilizing quantum dots or quantum wires in zeolite.

Abstract: The present disclosure relates to a novel composite structure for artificial photosynthesis reaction and an integrated reaction device for artificial photosynthesis including the same, and a novel composite structure for water splitting reaction and an integrated reaction device for water splitting including the same.

Abstract: The present invention relates to an iodine (I2) or bromine (Br2) adsorbent including a zeolite having a Si/Al ratio of 15 or greater; an I2 or Br2 carrier including the I2 or Br2 adsorbent; a column filled with the I2 or Br2 adsorbent; a article composed of the I2 or Br2 adsorbent or having the I2 or Br2 adsorbent attached thereto; a method for adsorbing or removing I2 or Br2 using the I2 or Br2 adsorbent; an iodine- or bromine-containing zeolite composite including a porous zeolite and iodine (I2) or bromine (Br2) confined in the pores of the zeolite; a semiconductor material including the iodine- or bromine-containing zeolite composite; and a method for preparing an iodine- or bromine-containing product using the iodine- or bromine-containing zeolite composite.

Abstract: The present application relates to a hydrogen ion transport membrane, which is formed by using a porous thin film having a plurality of holes which are regularly aligned, a membrane for generating hydrogen, and a method for manufacturing the hydrogen ion transport membrane and the membrane for generating hydrogen.

Abstract: Provided is method of preparing a printed matter with a printed array of particles, the method including: (a) preparing a template, a surface of which has depressions or projections capable of fixing the positions and/or orientations of one or more particles; (b) placing the particles on the template and applying a physical pressure to the particles so that a portion or the whole of each particle is inserted in each of pores defined by the depressions or the projections to form a particle array; and (c) contacting the template having thereon the particle array to a printing substrate so that the particle array is transferred to the printing substrate.