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Enhanced Gas‐Sensing Performances of Ru‐Loaded p‐Type Co 3 O 4 Nanoparticles
Author(s) -
Kruefu Viruntachar,
Inpan Ungkana,
Leangtanom Pimpan,
Arkarvipath Chatkaew,
Kongpark Patcharee,
Phokharatkul Ditsayut,
Wisitsoraat Anurat,
Tuantrat Adisorn,
Phanichphant Sukon
Publication year - 2018
Publication title -
physica status solidi (a)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.532
H-Index - 104
eISSN - 1862-6319
pISSN - 1862-6300
DOI - 10.1002/pssa.201701015
Subject(s) - ruthenium , nanoparticle , selectivity , materials science , analytical chemistry (journal) , precipitation , diffraction , ethanol , nanotechnology , nuclear chemistry , crystallography , chemistry , catalysis , organic chemistry , optics , physics , meteorology
Co 3 O 4 nanoparticles (NPs) and Co 3 O 4 NPs‐functionalized with 0.25, 0.50, and 1.00 wt.% Ruthenium (Ru) are synthesized by the precipitation and impregnation methods. X‐ray diffraction data confirm that all samples are highly crystalline with a typical cubic Co 3 O 4 NPs structure. Electron microscopic images show spherical morphologies of Co 3 O 4 nanoparticles with the diameters of 10–30 nm and Ru nanoparticles with relatively small diameters of 2–4 nm loaded on Co 3 O 4 surfaces. The gas‐sensing results reveal that Ru loading at an optimally low Ru content of 0.25 wt.% led to significantly enhanced ethanol sensing performances. Specifically, the 0.25 wt.%Ru/Co 3 O 4 sensor exhibits a good p‐type response of ≈30 to 100 ppm C 2 H 5 OH, short response time (0.08 s), good recovery time (a few minutes) and high C 2 H 5 OH selectivity against H 2 S, H 2 , NH 3 , NO 2 , and SO 2 . Therefore, the Ru‐loaded Co 3 O 4 sensor is a promising alternative p‐type gas sensor for ethanol detection.