Ammonia sensor based on polypyrrole-graphene nanocomposite decorated with titania nanoparticles

作者：Xiang, Cuili; Jiang, Dadi; Zou, Yongjin^*; Chu, Hailiang; Qiu, Shujun; Zhang, Huanzhi; Xu, Fen; Sun, Lixian; Zheng, Liangjun

来源：Ceramics International, 2015, 41(5): 6432-6438.

DOI：10.1016/j.ceramint.2015.01.081

• Nanocomposite
• TiO2 nanoparticles
• Polypyrrole-graphene
• NH3 sensor

A composite of polypyrrole (PPy) and graphene nanoplatelets (GNs) decorated with titanium dioxide (TiO2) nanoparticles (TiO2@PPy-GN) was synthesized by a sol-gel process combined with in situ chemical polymerization. The microstructure, morphology, and crystallinity of the TiO2@PPy-GN nanocomposite were characterized by Fourier-transform infrared spectrometry, scanning electron microscopy, transmission electron microscopy, and X-ray diffraction. The results indicate that the TiO2 nanoparticles with a diameter of 10-30 nm were well dispersed on the PPy-GN composite. The TiO2@PPy-GN nanocomposite exhibited good electrical-resistance response to NH3 at room temperature. Compared to the PPy-GN thin film, the TiO2@PPy-GN thin film showed enhanced NH3-sensing properties in the form of higher sensitivity and much faster response under the same conditions. The selectivity and stability of the NH3 sensor based on the TiO2@PPy-GN nanocomposite were also investigated.

• 出版日期2015-6
• 单位桂林电子科技大学