Journal
SENSORS AND ACTUATORS B-CHEMICAL
Volume 304, Issue -, Pages -Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2019.127358
Keywords
Co3O4; MnO2; One-dimensional; Shish-kebab structures; Triethylamine sensing
Funding
- Natural Science Foundation of China [51962009, 51602134, 51871115, 51661012, 51761017, 51561012, 51702140, 61664005]
- Natural Science Foundation of Jiangxi Province of China [20192BAB206011]
- Research projects of education department of Jiangxi province [170214]
Ask authors/readers for more resources
Novel one-dimensional shish-kebab structures composed of active (110)-faceted alpha-MnO2 nanowires as backbones and (111)-faceted Co3O4 nanocrystals as shells were prepared by a hydrothermal method followed by an in-situ epitaxial attachment growth strategy. A series of characterization revealed the formation of Co3O4@ MnO2 heterostructures with closely integrated hetero-interfaces. The growth mechanism study suggested that the multiple functions of hexamethylenetetramine were crucial for the the successful growth of the Co3O4@ MnO2 heterostructures. The gas sensing performance of the Co3O4@MnO2 heterostructures was studied for the first time. It was shown that the Co3O4@MnO2 heterostructures exhibited obvious enhanced triethylamine sensing performance compared with bare MnO2 nanowires and Co3O4 nanocrystals, suggesting a strong synergistic effect. The unique one-dimensional shish-kebab structures, increased surface active oxygen species and closely-attached hetero-interface were the key factors to improve the triethylamine sensing performance. The work not only provide an in-situ strategy for the synthesis of one-dimensional heterostructures, but also provide an effective way to improve the inherently low gas response of alpha MnO2 through comprehensive design of morphology, crystal facet and hetero-interface. Moreover, thanks to the unique morphology, surface and interface characteristics of the Co3O4@MnO2 heterostructures, they are expected to be used in more fields, such as batteries, supercapacitor and catalysis.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available