US 11,986,806 B2
Photocatalyst, gas sensor device and gas sensor
Michio Ushigome, Atsugi (JP); Masato Wakamura, Sakai (JP); and Osamu Tsuboi, Kawasaki (JP)
Assigned to FUJITSU LIMITED, Kawasaki (JP)
Filed by FUJITSU LIMITED, Kawasaki (JP)
Filed on Dec. 9, 2020, as Appl. No. 17/115,846.
Application 17/115,846 is a continuation of application No. PCT/JP2018/024693, filed on Jun. 28, 2018.
Prior Publication US 2021/0086169 A1, Mar. 25, 2021
Int. Cl. B01J 27/122 (2006.01); B01J 35/00 (2006.01); C01G 3/04 (2006.01); G01N 27/12 (2006.01); B01J 37/02 (2006.01)
CPC B01J 27/122 (2013.01) [B01J 35/004 (2013.01); C01G 3/04 (2013.01); G01N 27/125 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A gas sensor comprising:
a gas sensor device provided with a first electrode, a second electrode, and a sensitive film that connects the first electrode to the second electrode;
a light source that irradiates the sensitive film with light, wherein the sensitive film is made of cuprous bromide, and the cuprous bromide expresses a photocatalytic property of decomposing a substance brought into contact with the cuprous bromide by light applied from the light source; and
a control unit that:
measures a concentration of a measuring target gas based on a value detected by the gas sensor device in a case where the measuring target gas is supplied and also controls the light source,
controls a gas supply timing and a gas supply tune for supplying the measuring target gas, and also controls a light irradiation timing and a light irradiation time for irradiating the sensitive film with light from the light source,
controls the light source to irradiate the sensitive film with light at a timing at which the supply of the measuring target gas is stopped, and
controls the light source to irradiate the sensitive film with light until a resistance value returns to a resistance value from the gas sensor device detected when the supply of the measuring target gas is started.