公开(公告)号：US20220404303A1

公开(公告)日：2022-12-22

申请号：US17756075

申请日：2020-10-16

Applicant: NATIONAL INSTITUTE FOR MATERIALS SCIENCE ,  NATIONAL INSTITUTE OF ADVANCED INDUSTRIAL SCIENCE AND TECHNOLOGY

Inventor： Shinsuke ISHIHARA ,  Takashi NAKANISHI ,  Dachao HONG

IPC: G01N27/12 ,  B01J23/44 ,  B01J23/22 ,  B01J35/02 ,  C01B32/159 ,  C01B32/174

Abstract: [Object] To provide a compact and reusable alkene-detection gas sensor that detects an alkene and a system using the same.
[Solving Means] An alkene-detection gas sensor that detects an alkene in a sample gas according to the present invention includes: a first reaction unit that contains a palladium catalyst and oxidizes an alkene in a sample gas to convert the alkene into an aldehyde and/or a ketone; a second reaction unit that contains hydroxylamine salts and reacts with the aldehyde and/or ketone converted in the first reaction unit to generate an acid; and a response unit that includes an electrode supporting a semiconductor material of which an electrical resistance value changes by the generated acid, in which the palladium catalyst, the hydroxylamine salts, and the semiconductor material are separated from each other.

公开(公告)号：US20210372958A1

公开(公告)日：2021-12-02

申请号：US16644843

申请日：2018-08-24

Applicant: NATIONAL INSTITUTE FOR MATERIALS SCIENCE

Inventor： Shinsuke ISHIHARA ,  Jan LABUTA ,  Takashi NAKANISHI

IPC: G01N27/12

Abstract: [Object] To provide a formaldehyde detecting sensor capable of constantly monitoring formaldehyde selectively and with high accuracy.
[Solving Means] A formaldehyde detecting sensor according to the present invention includes: a reaction portion that contains at least a hydroxylamine salt and reacts with formaldehyde to generate an acid; and a response unit that includes an electrode carrying a carbon material, an electrical resistance value of the carbon material varying depending on the acid generated in the reaction portion, in which the hydroxylamine salt and the carbon material are separated from each other.