Shinshu University

Kotobuki Tsushou Co., Ltd.

Kotobuki Holdings Co., Ltd.

Takagi Co., Ltd.

Katsuyuki Murata

Toshio Takagi

Katsumi Kaneko

Yuji Ono

Ryusuke Futamura

Stevic Dragana

Fernando Vallejos-Burgos

Yasushi Shimizu

The present disclosure provides a carbon material including a carbon-containing layer having opening parts; and a solid body provided so as to cover the opening parts of the carbon-containing layer, in which the solid body has hole parts communicating with the opening parts.

Carbon material and method for producing carbon material

A molecular sieve that has high selectivity and enables high-speed molecular permeation is provided. The molecular sieve has a nanowindow formed lacking a portion of carbon atoms in graphene, and one or more heteroatoms substituting for one or more carbon atoms that constitute a rim of this nanowindow, in which an electrostatic field is induced within the nanowindow by the heteroatoms, the rim of the nanowindow is relaxed in cooperation with a permeating molecule having a van der Waals' radius larger than the nanowindow, and the molecular sieve becomes permeable to the permeating molecule.

Graphene nanowindow structure and method for producing highly pure gas

Water is separated into deuterium-depleted water having a low deuterium concentration and deuterium-enriched water having a high deuterium concentration easily and at low cost. A method for separating water into deuterium-depleted water and deuterium-enriched water, the method including: adsorbing water vapor on an adsorbent including a pore body having poreswhile supplying water vapor to and allowing the water vapor to pass through the adsorbent for a predetermined period of time; recovering deuterium-enriched water containing a large amount of heavy waterfrom the water vapor not adsorbed on the adsorbent; and then recovering deuterium-depleted water containing a large amount of light waterfrom the water vapor adsorbed on the adsorbent.

Method for producing deuterium-depleted water and method for producing deuterium-enriched water

Utilizing the fact that a predetermined adsorbent adsorbs light water at an initial desorption rate higher than heavy water and semi-heavy water, deuterium depleted water having a reduced concentration of heavy water and semi-heavy water is produced easily and in a short time. A method for producing deuterium depleted water by removing heavy water and semi-heavy water from water, the method including: a desorption process in which a relative pressure around a predetermined adsorbent with adsorbed water vapor is reduced, and in which water vapor desorbed from the adsorbent is recovered during a period of time when a desorption rate of light water&#x3e;a desorption rate of the heavy water and semi-heavy water.

Method for producing deuterium depleted water, method for separating heavy water and light water, and method for producing deuterium concentrated water

The purpose is to produce a molded filter body using graphene having water passage holes with a desired size by an easy process. A method for producing a molded filter body having a layer of grapheneas a filter medium, includes the steps of: forming a layer of a supporton a surface of graphite; forming support water passage holes in the layer of the support; peeling the layer of the supportfrom the graphitein a state of attaching the layer of grapheneon the surface of the graphiteto the layer of the support; and holding the layer of grapheneby heating at a low temperature for a predetermined time in the air containing oxygen at 160 to 250&#xb0; C. and forming graphene water passage holes.

Method for producing molded filter body

Deuterium-depleted water is produced easily and inexpensively. A method for producing deuterium-depleted water by removing heavy water and semi-heavy water from water includes an adsorption step of supplying water vapor to a predetermined adsorbent at pressure at which heavy water and semi-heavy water are adsorbed by the adsorbent and light water is not easily adsorbed, causing the heavy water and semi-heavy water to be adsorbed, and recovering the water vapor not adsorbed by the adsorbent. The method also includes a desorption step of maintaining vapor pressure around the predetermined adsorbent which has adsorbed the water vapor in a range in which light water is desorbed and heavy water or semi-heavy water is not easily desorbed, and recovering the water vapor desorbed from the adsorbent.

Method for producing deuterium-depleted water, method for separating heavy water and light water, and method for producing deuterium-enriched water

A filter molded article using a graphene with water passage holes having a desired size is produced in a simple step. A method for producing a filter molded article having a graphene layer as a filtering material is characterized by including a step of forming a supportlayer on a surface of a graphenelayer formed on initial substrates for a grapheneand, a step of forming water passage holes in the supportlayer, a step of removing the initial substrates for a grapheneand, and a step of forming water passage holes by heating and holding the graphenelayer at a low temperature in the air containing oxygen of 160 to 250&#xb0; C. for a predetermined time.

Growing community of inventors

Fukuoka, Japan

Katsuyuki Murata