期刊
JOURNAL OF COLLOID AND INTERFACE SCIENCE
卷 528, 期 -, 页码 53-62出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcis.2018.05.089
关键词
Yolk-shell; Metal-organic framework; ZIF-67; Sn doped Co3O4; Ethanol
资金
- National Nature Science Foundation of China [61573164, 61520106003, 61327804]
- National High-Tech Research and Development Program of China (863 Program) [2014AA06A505]
Yolk-shell nanomaterials with controlled morphology have received great attention because of their promising applications in gas sensing. Here, we reported the facile synthesis of pure and 1-5 mol% Sn doped Co3O4 yolk-shell nanostructures by calcinating the Co based metal-organic framework (MOF, ZIF-67) prepared from hydrothermal method. The morphologies of the as-obtained samples were characterized by various experimental techniques. Furthermore, the gas sensing properties were systematically measured. Gas sensors based on 3 mol% Sn doped Co3O4 yolk-shell nanostructures exhibited extremely enhanced response to ethanol at 200 degrees C (R-g/R-a = 13.4-100 ppm at 200 degrees C) and low detection limit (R-g/R-a = 1.3-1 ppm ethanol at 200 degrees C). Most importantly, the gas response to 100 ppm ethanol is still maintained well after continuous measurement for 20 days. (C) 2018 Published by Elsevier Inc.
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