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High performance ethylene sensor based on palladium-loaded tin oxide:Application in fruit quality detection

查看全文 作　　者：Qiuni [1]Zhao;Zaihua [1]Duan;Zhen [1]Yuan;Xian [2]Li;Si [1]Wang;Bohao [1]Liu;Yajie [1]Zhang;Yadong [1]Jiang;Huiling [1]Tai 高影响力作者 机构地区：[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高影响力机构 出　　处：《Chinese Chemical Letters》索引2020年第31卷第8期,共5页高影响力期刊 基　　金：supported by the National Science Funds for Excellent Young Scholars of China(No.61822106);National Science Funds for Creative Research Groups of China(No.61421002);Natural Science Foundation of China(No.61671115);Central Public-interest Scientific Institution Basal Research Fund(No.Y2019XK18)。 摘　　要：Ethylene(C2 H4),as a plant hormone,its emission can be served as an indicator to measure fruit quality.Due to the limited physiochemical reactivity of C2 H4,it is a challenge to develop high performance C2 H4 sensors for fruit detection.Herein,this paper presents a resistive-type C2 H4 sensor based on Pd-loaded tin oxide(SnO2).The C2 H4 sensing performance of proposed sensor are tested at optimum operating temperature(250℃)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 C2 H4.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 C2 H4 sensor are performed for monitoring the maturity and freshness of fruits,which presents a promising prospect in fruit quality evaluation. 关 键 词：Ethylene sensing Pd-loaded SnO2 High performance Low detection limit Fruit quality monitoring
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