Light-Regulated Electrochemical Sensor Array for Efficiently Discriminating Hazardous Gases

• DOI: 10.1021/acssensors.7b00423
• Publication Date: 2017-09-01T12:12:35Z
• Authors: Hongqiu Liang; Xin Zhang; Huihui Sun; Han Jin; Xiaowei Zhang; Qinghui Jin; Jie Zou; Hossam Haick; Jiawen Jian
• Keywords: Electrochemical gas sensor; SIGNAL (programming language); Response time; Sensor array; Ray

Inadequate detection limit and unsatisfactory discrimination features remain the challenging issues for widely applied electrochemical gas sensors. Quite recently, we confirmed that light-regulated reaction significantly enhanced electrocatalytic activity, thereby can potentially extend to parts per billion (ppb) level. Nevertheless, impact of on response selectivity has been discussed less. Herein, systematically report effect illumination via design fabrication a sensor array. Upon (light on), signal examined gases (C3H6, NO, CO) is selectively enhanced, resulting in array demonstrating disparate patterns when compared with operated at light off. Through processing all derived from both off pattern recognition algorithm, satisfactory feature observed. In contrast, apparent mutual interference between NO CO found solely without illumination. The mechanism studied it deduced discriminating be mainly attributed competition activity gas-phase reactivity. If (to specific gas) dominates whole sensing progress, enhancements corresponding would observed upon Otherwise, gives negligible impact. Hence, part by Conclusively, provide an efficient approach designing future smart devices.