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Acetone Gas‐sensing Properties of Multiple‐networked Pd‐decorated Bi 2 O 3 Nanorod Sensors
Author(s) -
Park Sunghoon,
Kim Soohyun,
Lee Sangmin,
Lee Chongmu
Publication year - 2015
Publication title -
bulletin of the korean chemical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.237
H-Index - 59
ISSN - 1229-5949
DOI - 10.1002/bkcs.10076
Subject(s) - nanorod , acetone , annealing (glass) , nanoparticle , materials science , chemical engineering , nanotechnology , chemistry , organic chemistry , composite material , engineering
This study examined the sensing properties of Bi 2 O 3 nanorods decorated with Pd nanoparticles. Pd‐decorated β‐ Bi 2 O 3 nanorods were prepared by immersing the Bi 2 O 3 nanorods in ethanol/(50 mM ) PdCl 2 solution followed by UV irradiation and annealing. The Bi 2 O 3 nanorods decorated with Pd nanoparticles showed faster and stronger response to acetone gas than the pristine Bi 2 O 3 nanorods. Interestingly, the difference in response time between the Pd‐decorated Bi 2 O 3 nanorod sensor and pristine Bi 2 O 3 nanorod sensor increased with increasing the acetone gas concentration. In contrast, the difference in recovery time between the two nanorod sensors decreased with increasing the acetone gas concentration. This difference can be explained using the chemical mechanism. The underlying mechanism for the enhanced response of the Bi 2 O 3 nanorods decorated with Pd nanoparticles to acetone gas is also discussed.