3D Hollow Quasi-Graphite Capsules/Polyaniline Hybrid with a High Performance for Room-Temperature Ammonia Gas Sensors

• DOI: 10.1021/acssensors.9b00882
• Publication Date: 2019-08-26T10:55:59Z
• Authors: Hong Wang; Song Nie; Han Li; Rashad Ali; Jianan Fu; Huajing Xiong; Jing Li; Zuquan Wu; Woon-Ming Lau; Nasir Mahmood; Ruonan Jia; Yifan Liu; Xian Jian
• Keywords: Hybrid material

Designing sensing materials with novel morphologies and compositions is eminently challenging to achieve high-performance gas sensor devices. Herein, an in situ oxidative polymerization approach developed construct three-dimensional (3D) hollow quasi-graphite capsules/polyaniline (GCs/PANI) hierarchical hybrids by decorating protonated PANI on the surface of GCs; as a result, immensely active sensitive material was for ammonia at room temperature. Moreover, GCs possessed capsule-like hollow/open structure partially graphitized walls, nanospheres were uniformly decorated GC surfaces. Furthermore, inflexible rigid 3D ordered chemistry these provides resulting large interfacial area, which not only allows rapid adsorption charge transfer but also necessary structural stability. The GCs/PANI exhibit excellent performance; GCs/PANI-3 hybrid highly (with response value 1.30) toward 10 ppm NH3 has short recovery times 34 42 s, respectively. demonstrates good selectivity, repeatability, long-term stability, are attributed substantial synergistic effect PANI. design such unique framework promising pathway room-temperature sensors commercial applications.