Hong Hao, Sun Jianwen, Wu Cinan, Liu Zewen
College of Big Data and Information Engineering, Guizhou University, Guiyang 550025, China.
Department of Microelectronics, Delft University of Technology, 2628 CD Delft, The Netherlands.
Sensors (Basel). 2019 Jul 30;19(15):3337. doi: 10.3390/s19153337.
High performance mixed potential type NO sensors using porous yttria-stabilized zirconia (YSZ) layers doped with different concentration graphite as solid electrolyte and LaFeO as sensing electrode were fabricated and characterized. LaFeO was prepared by a typical citrate sol-gel method and characterized using XRD. The surface morphology and porosity of porous YSZ layers were characterized by field emission scanning electron microscope (FESEM). The sensor doped with 3 wt% graphite shows the highest response (-76.4 mV to 80 ppm NO) and the response is linearly dependent on the logarithm of NO concentration in the range of 10-200 ppm. The sensor measurement results also present good repeatability and cross-sensitivity.
制备并表征了高性能混合电位型NO传感器，该传感器使用掺杂不同浓度石墨的多孔氧化钇稳定氧化锆（YSZ）层作为固体电解质，以LaFeO作为传感电极。采用典型的柠檬酸盐溶胶-凝胶法制备LaFeO，并通过XRD对其进行表征。利用场发射扫描电子显微镜（FESEM）对多孔YSZ层的表面形貌和孔隙率进行了表征。掺杂3 wt%石墨的传感器表现出最高的响应（对80 ppm NO为-76.4 mV），并且在10 - 200 ppm范围内响应与NO浓度的对数呈线性相关。传感器的测量结果还具有良好的重复性和交叉敏感性。
