TY - JOUR
T1 - Flower-like ZnO hollow microspheres loaded with CdO nanoparticles as high performance sensing material for gas sensors
AU - Wang, Tianshuang
AU - Kou, Xueying
AU - Zhao, Liupeng
AU - Sun, Peng
AU - Liu, Chang
AU - Wang, Yue
AU - Shimanoe, Kengo
AU - Yamazoe, Noboru
AU - Lu, Geyu
N1 - Funding Information:
This work is supported by the National Nature Science Foundation of China (No. 61520106003, 61503148, 61327804, 61374218, 61134010), Program for Chang Jiang Scholars and Innovative Research Team in University (No. IRT13018) and National High-Tech Research and Development Program of China (863 Program, No. 2013AA030902 and 2014AA06A505). China Postdoctoral Science Foundation funded project No. 2015M580247. National Key Research and Development Program (NO. 2016YFC0207300).
Publisher Copyright:
© 2017
PY - 2017
Y1 - 2017
N2 - CdO decorated flower-like ZnO hollow microspheres were successfully prepared via a two-step hydrothermal strategy. CdO nanoparticles (∼12 nm) equably loaded on the surfaces of ZnO nanosheets, which could be clearly observed from SEM and TEM images. The results of X-ray photoelectron spectroscopy and H2 temperature-programmed reduction (H2-TPR) indicated that the amount of chemisorbed oxygen was increased after the introduction of CdO nanoparticles. Compared with the flower-like ZnO hollow microspheres, the 2.6 mol% CdO:ZnO heterostructure composites exhibited highest response (65.5) to 100 ppm ethanol at 250 °C, which was about 16 folder higher than that of pure ZnO at the same operating temperature of 250 °C. Significantly, the detection limit of the 2.6 mol% CdO:ZnO heterostructure could reach ppb level (500 ppb). The mechanism of the enhanced ethanol sensing was also discussed systematically.
AB - CdO decorated flower-like ZnO hollow microspheres were successfully prepared via a two-step hydrothermal strategy. CdO nanoparticles (∼12 nm) equably loaded on the surfaces of ZnO nanosheets, which could be clearly observed from SEM and TEM images. The results of X-ray photoelectron spectroscopy and H2 temperature-programmed reduction (H2-TPR) indicated that the amount of chemisorbed oxygen was increased after the introduction of CdO nanoparticles. Compared with the flower-like ZnO hollow microspheres, the 2.6 mol% CdO:ZnO heterostructure composites exhibited highest response (65.5) to 100 ppm ethanol at 250 °C, which was about 16 folder higher than that of pure ZnO at the same operating temperature of 250 °C. Significantly, the detection limit of the 2.6 mol% CdO:ZnO heterostructure could reach ppb level (500 ppb). The mechanism of the enhanced ethanol sensing was also discussed systematically.
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U2 - 10.1016/j.snb.2017.04.099
DO - 10.1016/j.snb.2017.04.099
M3 - Article
AN - SCOPUS:85019569061
SN - 0925-4005
VL - 250
SP - 692
EP - 702
JO - Sensors and Actuators, B: Chemical
JF - Sensors and Actuators, B: Chemical
ER -