Detailed Information

Cited 0 time in webofscience Cited 0 time in scopus
Metadata Downloads

The stability, sensitivity and response transients of ZnO, SnO2 and WO3 sensors under acetone, toluene and H2S environments

Authors
Lee, IngunChoi, Seon JinPark, Kwang-MinLee, Sun SookChoi, SunghoKim, Il-DooPark, C. O.
Issue Date
Jul-2014
Publisher
ELSEVIER SCIENCE SA
Keywords
H2S sensor; WO3; SnO2; ZnO; Stability; Sensitivity
Citation
SENSORS AND ACTUATORS B-CHEMICAL, v.197, pp.300 - 307
Indexed
SCIE
SCOPUS
Journal Title
SENSORS AND ACTUATORS B-CHEMICAL
Volume
197
Start Page
300
End Page
307
URI
https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/159531
DOI
10.1016/j.snb.2014.02.043
ISSN
0925-4005
Abstract
Chemoresistive H2S sensors using various oxide nanoparticles were prepared and heat-treated at 600 degrees C in an effort to define halitosis in human breath. WO3, ZnO, and SnO2 were tested as sensing materials, among which WO3 showed the highest stability to H2S. XPS analysis showed a metal sulfate peak on the surface of ZnO and SnO2, which causes a recovery problem after 2 ppm H2S exposure. On the contrary, the WO3 sensor showed a stable signal in long-term operation in the presence of H2S gas. WO3 gas sensors decorated with various catalytic metals were fabricated to investigate their sensing properties in the 0.2-5 ppm H2S range with 80% relative humidity (RH). A 0.03 wt% Au-doped WO3 sensor exhibited excellent H2S sensitivity (R-air/R-gas = 12.40 at 2 ppm) toward H2S, whereas pure WO3 showed a sensitivity of 4.85 with negligible interference from the volatile organic compounds (VOCs).
Files in This Item
Go to Link
Appears in
Collections
서울 공과대학 > 서울 신소재공학부 > 1. Journal Articles

qrcode

Items in ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.

Related Researcher

Researcher Choi, Seon Jin photo

Choi, Seon Jin
COLLEGE OF ENGINEERING (SCHOOL OF MATERIALS SCIENCE AND ENGINEERING)
Read more

Altmetrics

Total Views & Downloads

BROWSE