Solid-State Gas Sensors with Ni-Based Sensing Materials for Highly Selective Detecting NOx

被引:0
作者
Zhang, Zhenghu [1 ,2 ]
Yi, Chenghan [1 ,2 ]
Chen, Tao [3 ]
Zhao, Yangbo [3 ]
Zhang, Yanyu [3 ]
Jin, Han [1 ,2 ,4 ,5 ,6 ]
机构
[1] Shanghai Jiao Tong Univ, Inst Micronano Sci & Technol, Sch Elect Informat & Elect Engn, Shanghai 200240, Peoples R China
[2] Shanghai Jiao Tong Univ, Sch Elect Informat & Elect Engn, Natl Key Lab Adv Micro & Nano Manufacture Technol, Shanghai 200240, Peoples R China
[3] Nanjing Novlead Biotechnol Co Ltd, Nanjing 211800, Peoples R China
[4] Henan Univ, Sch Med, Kaifeng 475004, Peoples R China
[5] Natl Engn Res Ctr Nanotechnol, Shanghai 200241, Peoples R China
[6] Wuzhen Lab, Tongxiang 314500, Peoples R China
基金
中国国家自然科学基金;
关键词
NOx gas sensor; yttria-stabilized zirconia (YSZ); high selectivity; inhaled nitric oxide; Ni-based sensing materials; INHALED NITRIC-OXIDE; PLATE-LIKE CR2O3; PULMONARY-HYPERTENSION; HIGH-TEMPERATURE; ELECTRODE; YSZ; SENSITIVITY; CO;
D O I
10.3390/s24227378
中图分类号
O65 [分析化学];
学科分类号
070302 ; 081704 ;
摘要
Precise monitoring of NOx concentrations in nitric oxide delivery systems is crucial to ensure the safety and well-being of patients undergoing inhaled nitric oxide (iNO) therapy for pulmonary arterial hypertension. Currently, NOx sensing in commercialized iNO instruments predominantly relies on chemiluminescence sensors, which not only drives up costs but also limits their portability. Herein, we developed solid-state gas sensors utilizing Ni-based sensing materials for effectively tracking the levels of NO and NO2 in the NO delivery system. These sensors comprised of NiO-SE or (NiFe2O4 + 30 wt.% Fe2O3)-SE vs. Mn-based RE demonstrated high selectivity toward 100 ppm NO under the interference of 10 ppm NO2 or 3 ppm NO2 under the interference of 100 ppm NO, respectively. Meanwhile, excellent stability, repeatability, and humidity resistance were also verified for the proposed sensors. Sensing mechanisms were thoroughly investigated through assessments of adsorption capabilities and electrochemical reactivity. It turns out that the superior electrochemical reactivity of NiO toward NO, alongside the NO2 favorable adsorption characteristics of (NiFe2O4 + 30 wt.% Fe2O3), is the primary reason for the high selectivity to NOx. These findings indicate a bright future for the application of these NOx sensors in innovative iNO treatment technologies.
引用
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页数:13
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