A facile controllable self-assembly of 3D elliptical ZnO microspheres from 1D nanowires for effective detection of acetone

[Display omitted] •ZnO elliptic microspheres were self-assembled from nanowires by solvothermal route.•Nanowires-composed ZnO has the wool ball-like morphology and 3D network structures.•The length of nano-wires/-bars is controlled effectively by adjusting amount of alkali.•The wool ball-like ZnO ex...

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Bibliographic Details
Published in:Materials letters 2020-07, Vol.270, p.127706, Article 127706
Main Authors: Shi, Wenqiong, Shang, Yangyang, Maruf Ahmed, Md, Zhao, Ruihua, Li, Shenghu, Du, Jianping, Li, Jinping
Format: Article
Language:English
Subjects:
Acetone
Controllable self-assembly
Materials science
Microspheres
Microstructure
Morphology
Nanorods
Nanowires
Selectivity
Self-assembly
Semiconductors
Sensitivity enhancement
Sensors
Stability
Synthesis
Wool
Zinc oxide
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Summary:[Display omitted] •ZnO elliptic microspheres were self-assembled from nanowires by solvothermal route.•Nanowires-composed ZnO has the wool ball-like morphology and 3D network structures.•The length of nano-wires/-bars is controlled effectively by adjusting amount of alkali.•The wool ball-like ZnO exhibits excellent sensing properties of acetone detection.•The wool ball-like ZnO is suitably served as sensor material for detection of volatile gases. 3D elliptical ZnO microspheres self-assembled from 1D nanowires were synthesized via a facile solvothermal route. Their morphology and structures were characterized by X-ray diffraction, scanning electron microscopy and N2 adsorption-desorption techniques, and the gas-sensing properties were investigated. The results indicate that as-synthesized elliptical wool ball-like ZnO can be controlled by adjusting alkali concentrations and it exhibits enhanced sensitivity and high selectivity to acetone. Notably, the response to 10 and 100 ppm reached 14 and 36 respectively, which are 4 and 1.5 times as much as that of the nanorods-composed ZnO, implying wool ball-like ZnO microstructures can be served as sensor material for acetone detection.
ISSN:0167-577X
1873-4979
DOI:10.1016/j.matlet.2020.127706