TY - JOUR
T1 - Selective dual detection of hydrogen sulfide and methyl mercaptan using CuO/CuFe2O4 nanopattern chemiresistors
AU - Lim, Kyeorei
AU - Jo, Young Moo
AU - Kim, Seonghwan
AU - Yoon, Ji Wook
AU - Jeong, Seong Yong
AU - Kim, Jun Sik
AU - Choi, Hun Ji
AU - Cho, Youngkyu
AU - Park, Jangpyo
AU - Jeong, Yong Won
AU - Lee, Jong Heun
N1 - Funding Information:
This study was supported by SAMSUNG Research , Samsung Electronics Co. Ltd., Republic of Korea and National Research Foundation of Korea grant funded by the Korean Government , Republic of Korea (No. 2021M3H4A3A02086430 ).
Funding Information:
This study was supported by SAMSUNG Research, Samsung Electronics Co. Ltd. Republic of Korea and National Research Foundation of Korea grant funded by the Korean Government, Republic of Korea (No. 2021M3H4A3A02086430).
Publisher Copyright:
© 2021 Elsevier B.V.
PY - 2021/12/1
Y1 - 2021/12/1
N2 - Volatile sulfur compounds (VSCs), such as H2S and methyl mercaptan (MM), are malodorous and harmful gases. H2S and MM share analogical origins. However, they should be discriminated because of their different odor thresholds and health impacts. Herein, a nanopattern chemiresistor composed of aligned CuO-loaded CuFe2O4 nanofibers was prepared via direct-write near-field electrospinning. The CuO/CuFe2O4 sensor with the atomic ratio of [Cu]:[Fe] = 3:4 exhibited extremely high responses to ppm-level H2S and MM compared with other nanopattern sensors with different compositions ([Cu]/[Fe] = 2:4, 4:4, and 0:1). This can be attributed to the gas-accessible morphology of the nanopattern sensor, the formation of a nanoscale p(CuO)-n(CuFe2O4) junction, and the intimate reaction between the discretely loaded CuO nanoparticles and the VSCs. Furthermore, the CuO/CuFe2O4 sensor exhibited high selectivities to H2S and MM at 200 ℃ and 400 ℃, respectively. The selective dual detection of H2S and MM using a single CuO/CuFe2O4 sensor via the simple modulation of the sensing temperature opens a new route for indoor air quality monitoring, ventilation control, halitosis diagnosis, and wine quality monitoring.
AB - Volatile sulfur compounds (VSCs), such as H2S and methyl mercaptan (MM), are malodorous and harmful gases. H2S and MM share analogical origins. However, they should be discriminated because of their different odor thresholds and health impacts. Herein, a nanopattern chemiresistor composed of aligned CuO-loaded CuFe2O4 nanofibers was prepared via direct-write near-field electrospinning. The CuO/CuFe2O4 sensor with the atomic ratio of [Cu]:[Fe] = 3:4 exhibited extremely high responses to ppm-level H2S and MM compared with other nanopattern sensors with different compositions ([Cu]/[Fe] = 2:4, 4:4, and 0:1). This can be attributed to the gas-accessible morphology of the nanopattern sensor, the formation of a nanoscale p(CuO)-n(CuFe2O4) junction, and the intimate reaction between the discretely loaded CuO nanoparticles and the VSCs. Furthermore, the CuO/CuFe2O4 sensor exhibited high selectivities to H2S and MM at 200 ℃ and 400 ℃, respectively. The selective dual detection of H2S and MM using a single CuO/CuFe2O4 sensor via the simple modulation of the sensing temperature opens a new route for indoor air quality monitoring, ventilation control, halitosis diagnosis, and wine quality monitoring.
KW - Dual-mode gas sensor
KW - Malodor gas sensor
KW - Near-field electrospinning
KW - Oxide nanopattern
KW - Volatile sulfur compound sensor
UR - http://www.scopus.com/inward/record.url?scp=85114114012&partnerID=8YFLogxK
U2 - 10.1016/j.snb.2021.130665
DO - 10.1016/j.snb.2021.130665
M3 - Article
AN - SCOPUS:85114114012
VL - 348
JO - Sensors and Actuators, B: Chemical
JF - Sensors and Actuators, B: Chemical
SN - 0925-4005
M1 - 130665
ER -