State Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University , 2699 Qianjin Street, Changchun, Jilin 130012, China.
State Key Laboratory of Automotive Simulation and Control, Jilin University , 5988 Renmin Avenue, Changchun, Jilin 130012, China.
ACS Appl Mater Interfaces. 2016 Jul 6;8(26):16752-60. doi: 10.1021/acsami.6b04219. Epub 2016 Jun 23.
A well-ordered porous three-phase boundary (TPB) was prepared with a polystyrene sphere as template and examined to improve the sensitivity of yttria-stabilized zirconia (YSZ)-based mixed-potential-type NO2 sensor due to the increase of the electrochemical reaction active sites. The shape of pore array on the YSZ substrate surface can be controlled through changing the concentration of the precursor solution (Zr(4+)/Y(3+) = 23 mol/L/4 mol/L) and treatment conditions. An ordered hemispherical array was obtained when CZr(4+) = 0.2 mol/L. The processed YSZ substrates were used to fabricate the sensors, and different sensitivities caused by different morphologies were tested. The sensor with well-ordered porous TPB exhibited the highest sensitivity to NO2 with a response value of 105 mV to 100 ppm of NO2, which is approximately twice as much as the smooth one. In addition, the sensor also showed good stability and speedy response kinetics. All these enhanced sensing properties might be due to the structure and morphology of the enlarged TPB.
制备了具有有序多孔三相界面（TPB）的聚苯乙烯球模板，并对其进行了研究，以提高基于氧化钇稳定氧化锆（YSZ）的混合电位型 NO2 传感器的灵敏度，因为这增加了电化学反应的活性位点。通过改变前驱体溶液的浓度（Zr(4+)/Y(3+) = 23 mol/L/4 mol/L）和处理条件，可以控制 YSZ 基底表面的孔阵列形状。当 CZr(4+) = 0.2 mol/L 时，得到有序的半球形阵列。将处理后的 YSZ 基底用于制备传感器，并测试了不同形貌引起的不同灵敏度。具有有序多孔 TPB 的传感器对 NO2 表现出最高的灵敏度，对 100 ppm 的 NO2 的响应值为 105 mV，大约是光滑传感器的两倍。此外，该传感器还表现出良好的稳定性和快速的响应动力学。所有这些增强的传感性能可能归因于扩大的 TPB 的结构和形态。
