High performance ethylene sensor based on palladium-loaded tin oxide: Application in fruit quality detection |
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| Institution: | 1. State Key Laboratory of Electronic Thin Films and Integrated Devices, School of Optoelectronic Science and Engineering, University of Electronic Science and Technology of China (UESTC), Chengdu 610054, China;2. Agricultural Information Institute, Chinese Academy of Agricultural Sciences, Key Laboratory of Agricultural Information Service Technology of Ministry of Agriculture, Beijing 100081, China;1. Department of Materials Science and Engineering, Korea University, Seoul 02841, Republic of Korea;2. State Key Laboratory for Mechanical Behavior of Materials, Xi’an Jiaotong University, Xi’an, Shaanxi 710049, People’s Republic of China;1. Department of Physics, Jadavpur University, Kolkata 700032, India;2. Department of Physics,Indian institute of Engineering Science and Technology, Shibpur, Howrah 711103, India;1. Key Laboratory of Theoretical and Computational Photochemistry, College of Chemistry, Beijing Normal University, Beijing 100875, China;2. Department of Thoracic Surgery, Cancer Institute and Hospital, Chinese Academy of Medical Sciences, Beijing 10021, China;3. Department of Chemical and Environmental Engineering, Anyang Institute of Technology, Anyang 455000, China;1. Institute of Physical and Theoretical Chemistry (IPTC), University of Tuebingen, Auf der Morgenstelle 15, D-72076, Tuebingen, Germany;2. King Abdulaziz City for Science and Technology (KACST), P. O. Box 6086, Riyadh, 11442, Saudi Arabia |
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| Abstract: | Ethylene (C2H4), as a plant hormone, its emission can be served as an indicator to measure fruit quality. Due to the limited physiochemical reactivity of C2H4, it is a challenge to develop high performance C2H4 sensors for fruit detection. Herein, this paper presents a resistive-type C2H4 sensor based on Pd-loaded tin oxide (SnO2). The C2H4 sensing performance of proposed sensor are tested at optimum operating temperature (250 °C) with ambient relative humidity (51.9% RH). The results show that the response of Pd-loaded SnO2 sensor (11.1, Ra/Rg) is about 3 times higher than that of pristine SnO2 (3.5) for 100 ppm C2H4. The response time is also significantly shortened from 7 s to 1 s compared with pristine SnO2. Especially, the Pd-loaded SnO2 sensor possesses good sensitivity (0.58 ppm−1) at low concentration (0.05–1 ppm) with excellent linearity (R2 = 0.9963) and low detection limit (50 ppb). The high sensing performance of Pd-loaded SnO2 are attributed to the excellent adsorption and catalysis effects of Pd nanoparticle. Meaningfully, the potential applications of C2H4 sensor are performed for monitoring the maturity and freshness of fruits, which presents a promising prospect in fruit quality evaluation. |
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| Keywords: | Ethylene sensing High performance Low detection limit Fruit quality monitoring |
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