共 59 条
Pure and Palladium-Loaded Co3O4 Hollow Hierarchical Nanostructures with Giant and Ultraselective Chemiresistivity to Xylene and Toluene
被引:55
作者:

Hwang, Su-Jin
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机构:
Korea Univ, Dept Mat Sci & Engn, Seoul 136713, South Korea Korea Univ, Dept Mat Sci & Engn, Seoul 136713, South Korea

Choi, Kwon-Il
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h-index: 0
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Korea Univ, Dept Mat Sci & Engn, Seoul 136713, South Korea Korea Univ, Dept Mat Sci & Engn, Seoul 136713, South Korea

Yoon, Ji-Wook
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Korea Univ, Dept Mat Sci & Engn, Seoul 136713, South Korea Korea Univ, Dept Mat Sci & Engn, Seoul 136713, South Korea

Kang, Yun Chan
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机构:
Korea Univ, Dept Mat Sci & Engn, Seoul 136713, South Korea Korea Univ, Dept Mat Sci & Engn, Seoul 136713, South Korea

Lee, Jong-Heun
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机构:
Korea Univ, Dept Mat Sci & Engn, Seoul 136713, South Korea Korea Univ, Dept Mat Sci & Engn, Seoul 136713, South Korea
机构:
[1] Korea Univ, Dept Mat Sci & Engn, Seoul 136713, South Korea
基金:
新加坡国家研究基金会;
关键词:
cobalt;
methylbenzenes;
nanostructures;
palladium;
sensors;
GAS-SENSING PROPERTIES;
CATALYTIC-OXIDATION;
SNO2;
NANOSTRUCTURES;
HIGH-SENSITIVITY;
SENSORS;
PERFORMANCE;
NANOPARTICLES;
METAL;
CO;
NANOCRYSTALS;
D O I:
10.1002/chem.201405076
中图分类号:
O6 [化学];
学科分类号:
0703 ;
摘要:
Pure and palladium-loaded Co3O4 hollow hierarchical nanostructures consisting of nanosheets have been prepared by solvothermal self-assembly. The nanostructures exhibited an ultrahigh response and selectivity towards pxylene and toluene. The responses (resistance ratio) of the palladium-loaded Co3O4 hollow hierarchical nanostructures to 5 ppm of p-xylene and toluene were as high as 361 and 305, respectively, whereas the selectivity values (response ratios) towards p-xylene and toluene over interference from ethanol were 18.1 and 16.1, respectively. We attributed the giant response and unprecedented high selectivity towards methylbenzenes to the abundant adsorption of oxygen by Co3O4, the high chemiresistive variation in the Co3O4 nanosheets (thickness. 11 nm), and the catalytic promotion of the specific gas-sensing reaction. The morphological design of the p-type Co3O4 nanostructures and loading of the palladium catalyst have paved a new way to monitoring the most representative indoor air pollutants in a highly selective, sensitive, and reliable manner.
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页码:5872 / 5878
页数:7
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