Journal
SENSORS AND ACTUATORS B-CHEMICAL
Volume 327, Issue -, Pages -Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2020.128911
Keywords
ZnO nanorods; CuPc loaded; ammonia; gas sensor
Funding
- NSFC [61775149, 61805164]
- Science and Technology plan project of Guangdong [2017A010101018]
- Science and Technology plan project of Shenzhen [JCYJ20190808145207437, JCYJ20190808120801661]
- Shenzhen Science and Technology Program [KQTD20180412181422399]
- Science and Technology Innovation Commission of Shenzhen [20180123]
- National Key R&D Program of China [2019YFB2204500]
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This study synthesized CuPc-loaded ZnO nanorods using a one-step microwave-assisted hydrothermal approach and characterized the products using various techniques. The CuPc/ZnO sensor showed excellent sensitivity and selectivity towards ammonia under light illumination, with a low detection limit of 0.8 ppm under red light.
A one-step microwave-assisted hydrothermal synthetic approach was used to synthesize CuPc-loaded ZnO nanorods. Several characterization techniques were applied to analyze the compositional, structural and morphological information of the products, such as X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), UV vis spectrophotometer (UV-vis) and X-ray photoelectron spectroscopy (XPS). Both pure ZnO and CuPc-loaded ZnO were characterized in terms of their gas sensing performances towards various gases under light illumination. The results indicated that CuPc/ZnO sensor delivers excellent sensitivity and selectivity towards ammonia, accompanied with rapid response/recovery rate, remarkable humidity resistance and a low detection limit down to 0.8 ppm at room temperature under red light illumination. This work will open-up new vistas in the development of room temperature gas sensors based on wide-band gap semiconductors with visible-light irradiation.
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