Further enhancement of the light-regulated mixed-potential signal with ZnO-based electrodes

CORC > 宁波材料技术与工程研究所 > 中国科学院宁波材料技术与工程研究所 > 2018专题

	Further enhancement of the light-regulated mixed-potential signal with ZnO-based electrodes
	Shen, Wenfeng; Jin, Han; Zhang, Xiaowei; Hua, Changzhou; Zhang, Xin; Zou, Jie; Jian, Jiawen
刊名	SENSORS AND ACTUATORS B-CHEMICAL
	2018
卷号	255 页码:3516-3522
关键词	Volatile Organic-compounds Ysz-based Sensor Sensing-electrode Gas Sensor Ppb Level Zno/in2o3 Heteronanostructures Monitoring Applications No2 Sensor Benzene Toluene
英文摘要	UV illumination has been confirmed to be essentially increased the response magnitude of potentiometric gas sensors. Nevertheless, the detection limit of the sensor is still inadequate for real application even upon UV light, whilst, how to efficiently enhance the light-regulated mixed-potential signal is still unclear. In this research, the strategy of using the more photoactive ZnO-based composite as the sensing electrode (SE) for potentially further enhancing the sensing value is proposed and confirmed. Typically, in comparison with ZnO-SE, ZnO-based composite SE is beneficial for further promoting the light-regulation effect. Particularly, when upon illumination, the detection limit of the sensor consisting of the composite electrode (towards benzene) reaches 0.109 ppm, while that of the value for the sensor using ZnO-SE is 0.898 ppm. The promoting mechanism is clarified from the perspective of the electrocatalytic activity & gas-phase reactivity. In summary, forming the ZnO-based composites makes them ideal for generating abundant e(-) and h(+) when upon illumination, leading to the obvious increase in the catalytic activity of both cathodic & anodic reaction and thereby further raised the mixed-potential signal. Conclusively, this proof-of-concept opens a brighter future for designing future high-performance potentiometric gas sensors. (C) 2017 Elsevier B.V. All rights reserved.
学科主题	Materials Science
语种	英语
公开日期	2018-12-04
内容类型	期刊论文
源URL	[http://ir.nimte.ac.cn/handle/174433/16852]
专题	2018专题
推荐引用方式 GB/T 7714	Shen, Wenfeng,Jin, Han,Zhang, Xiaowei,et al. Further enhancement of the light-regulated mixed-potential signal with ZnO-based electrodes[J]. SENSORS AND ACTUATORS B-CHEMICAL,2018,255:3516-3522.
APA	Shen, Wenfeng.,Jin, Han.,Zhang, Xiaowei.,Hua, Changzhou.,Zhang, Xin.,...&Jian, Jiawen.(2018).Further enhancement of the light-regulated mixed-potential signal with ZnO-based electrodes.SENSORS AND ACTUATORS B-CHEMICAL,255,3516-3522.
MLA	Shen, Wenfeng,et al."Further enhancement of the light-regulated mixed-potential signal with ZnO-based electrodes".SENSORS AND ACTUATORS B-CHEMICAL 255(2018):3516-3522.