Enhanced chlorine sensing performance of the sensor based NAISCON and Cr-series spinel-type oxide electrode with aging treatment

详细信息    查看全文

• 作者：Han ZhangAuthor Vitae ; Xiaoyang ChengAuthor Vitae ; Ruize SunAuthor Vitae ; Yingzhou GuanAuthor Vitae ; Yingwei LiuAuthor Vitae ; Chengguo YinAuthor Vitae ; Xishuang Liang ; ^{liangxs@jlu.edu.cn" class="auth_mail}Author Vitae ; Geyu Lu ; ^{lugy@jlu.edu.cn" class="auth_mail}Author Vitae
• 关键词：Chlorine sensor ; Solid-electrolyte ; NASICON ; Spinel-type oxides
• 刊名：Sensors and Actuators B: Chemical
• 出版年：31 July 2014
• 年：2014
• 卷：198
• 期：Complete
• 页码：26-32
• 全文大小：2223 K

文摘

NASICON-based gas sensors attached with Cr-based spinel-type oxide (ACr₂O₄, A = Zn, Co, Ni) sensing electrode were fabricated, and their gas sensing properties were tested for response to chlorine (Cl₂). In comparison with other spinel-type oxides, CoCr₂O₄-based sensor showed the maximum response to Cl₂ at 300 °C, giving a response of −226 mV to 1 ppm of Cl₂, which was about 3.3 and 1.3 times higher than that sensors-based on ZnCr₂O₄ and NiCr₂O₄, respectively. Moreover, the sensor exhibited excellent selectivity toward Cl₂ against the other interference gases, such as CO, NO, NO₂, H₂, C₇H₈, NH₃ and CH₄. Interestingly, the performance of sensor could be markedly improved after aging at 300 °C for 60 days. Combined with the analysis by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and BET, a possible mechanism for the influence of aging on the Cl₂-sensing properties of sensor was proposed.