In this study, a simple inexpensive gas sensor, which uses polyaniline@ZnO hollow sphere hybrid films, is prepared with different mole percentages of ZnO hollow spheres (5–30 mol%) and combining hydrothermal and in-situ chemical oxidative polymerization methods. Polyaniline@ZnO hollow sphere hybrids are loaded on flexible polyethylene terephthalate substrates for rapid and selective detection of ammonia at room temperature. The morphology, structure, chemical functional group information and the specific surface area are, respectively, characterized by field emission-scanning electron microscopy, X-ray diffraction, Fourier transform infrared and N₂ adsorption–desorption techniques. The best sensing performance is realized for the polyaniline@20 mol% ZnO hollow sphere hybrid sensor, which is exposed to 10 ppm ammonia at room temperature. Moreover, this sensor exhibits a low detection limit of 500 ppb, excellent selectivity and good response/recovery times (140/136 s). This good sensing performance can be attributed to the hollow structure of ZnO and the p–n heterojunction between the polyaniline and ZnO hollow spheres.

在这项研究中，使用不同摩尔百分比的ZnO空心球（5–30 mol％）并结合水热和原位化学氧化聚合方法制备了一种简单的廉价气体传感器，该传感器使用聚苯胺@ZnO中空球混合膜。将聚苯胺@ZnO空心球杂化物装载在柔性聚对苯二甲酸乙二醇酯基质上，以在室温下快速选择性地检测氨。通过场发射扫描电子显微镜，X射线衍射，傅立叶变换红外光谱和N ₂分别表征其形态，结构，化学官能团信息和比表面积。吸附-解吸技术。聚苯胺@ 20 mol％ZnO中空球混合传感器实现了最佳的感测性能，该传感器在室温下暴露于10 ppm的氨气中。此外，该传感器具有500 ppb的低检测限，出色的选择性和良好的响应/恢复时间（140/136 s）。良好的感测性能归因于ZnO的空心结构以及聚苯胺和ZnO空心球之间的p–n异质结。