@ARTICLE{10.3389/fchem.2018.00493,
AUTHOR={Zhu, Chonghui and Cheng, Xiaoli and Dong, Xin and Xu, Ying ming},
TITLE={Enhanced Sub-ppm NH3 Gas Sensing Performance of PANI/TiO2 Nanocomposites at Room Temperature},
JOURNAL={Frontiers in Chemistry},
VOLUME={6},
YEAR={2018},
URL={https://www.frontiersin.org/articles/10.3389/fchem.2018.00493},
DOI={10.3389/fchem.2018.00493},
ISSN={2296-2646},
ABSTRACT={PANI/TiO2 nanocomposites spheres were synthesized using a simple and efficient one-step hydrothermal process. The morphology and structure of PANI/TiO2 nanocomposites spheres were investigated by X-ray diffraction (XRD), scanning electron microscopy (SEM), and transmission electron microscopy (TEM) techniques. The PANI/TiO2 nanocomposite sphere-based sensor exhibits good selectivity, sensitivity (5.4 to 100 ppm), repeatability, long-term stability and low detection limit (0.5 ppm) to ammonia at room temperature (20 ± 5°C). It also shows a good linearity relationship in the range of 0.5–5 and 5–100 ppm. The excellent NH3 sensing performance is mainly due to the formation of the p-n heterostructure in the nanocomposites.}
}