	US 12,188,890 B2
	Gas detection complex and method for producing same, gas sensor comprising gas detection complex and method for manufacturing same
Jongheun Lee, Seoul (KR); Changhoon Kwak, Yongin-si (KR); and Seongyong Jeong, Iksan-si (KR)
Assigned to Korea University Research and Business Foundation, Seoul (KR)
Filed by KOREA UNIVERSITY RESEARCH AND BUSINESS FOUNDATION, Seoul (KR)
Filed on May 8, 2023, as Appl. No. 18/313,581.
Application 18/313,581 is a division of application No. 17/052,902, abandoned, previously published as PCT/KR2018/015804, filed on Dec. 13, 2018.
Claims priority of application No. 10-2018-0062142 (KR), filed on May 30, 2018.
Prior Publication US 2023/0273139 A1, Aug. 31, 2023
Int. Cl. G01N 27/12 (2006.01); C23C 14/14 (2006.01); C23C 14/30 (2006.01)

CPC G01N 27/125 (2013.01) [C23C 14/14 (2013.01); C23C 14/30 (2013.01)]

9 Claims

1. A method for detecting a gas, the method comprising:

preparing a sensor for detecting the gas by coating a complex on a film,

flowing the gas into the sensor, and

measuring a change in an electrical resistance of the sensor,

wherein the complex comprises a nanostructure made of an oxide semiconductor; and

a Terbium (Tb) additive supported on the nanostructure,

wherein the oxide semiconductor comprises tin oxide (SnO₂), and

wherein an atomic percent of the terbium (Tb) additive is more than 5 at % to 20 at % based on a total element amount of tin (Sn) of the nanostructure,

wherein the gas is detected in an atmosphere of a relative humidity of 80% or more, and

wherein the complex is prepared by a method comprising:

preparing a solution comprising tin (Sn) salt, terbium (Tb) salt, and an organic acid or sugar;

performing an ultrasonic spray pyrolysis reaction by spraying the solution through an ultrasonic spray pyrolysis apparatus; and

obtaining the complex as fine powders,

wherein the terbium (Tb) salt is TbCl₃·6H₂O.