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PdO/SnO 2 hollow nanospheres for carbon monoxide detection
Author(s) -
Wang Chengnan,
Zhao Pei,
Liu Shantang
Publication year - 2015
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.201431892
Subject(s) - materials science , carbon monoxide , selectivity , doping , x ray photoelectron spectroscopy , tetragonal crystal system , analytical chemistry (journal) , detection limit , operating temperature , carbon fibers , chemical engineering , phase (matter) , catalysis , chemistry , optoelectronics , chromatography , composite material , organic chemistry , composite number , physics , engineering , thermodynamics
SnO 2 hollow nanospheres (SnO 2 HNs) and different amount of PdO‐doped SnO 2 HNs were successfully synthesized and applied to fabricate sensors for CO detection. The synthesized SnO 2 and PdO/SnO 2 materials have tetragonal and HN structure with a diameter of ∼180 nm, and the existence of Pd element is revealed by EDS and XPS. In addition, the sensors based on the pristine SnO 2 and Pd‐loaded SnO 2 HNs were investigated for CO sensing properties. The experiment results indicated that materials of the best doping ratio is 1 mol%, because 1 mol% PdO/SnO 2 HN sensor had a lower optimized operating temperature (150 °C) and exhibited more excellent sensitivity than the other sensors for the detection of CO. Furthermore, the response value of 1 mol% PdO/SnO 2 HN sensor presented a linear relationship with CO concentration in the range 20–500 ppm CO at 150 °C. Meanwhile, 1 mol% PdO/SnO 2 HN sensor exhibited a remarkable selectivity to CO against volatile organic compounds. These results demonstrated that 1 mol% PdO/SnO 2 HNs are promising materials for application as a CO gas sensor when its working temperature is 150 °C.Comparison of PdO/SnO 2 hollow nanospheres with various amount of Pd loading for 200 ppm CO detection at different temperatures.