Ammonia sensor based on polypyrrole–graphene nanocomposite decorated with titania nanoparticles. Issue 5 (June 2015)

• Record Type: Journal Article
• Authors: Xiang, Cuili; Jiang, Dadi; Zou, Yongjin; Chu, Hailiang; Qiu, Shujun; Zhang, Huanzhi; Xu, Fen; Sun, Lixian; Zheng, Liangjun
• Is Part Of: Ceramics international. Volume 41:Issue 5(2015)Part A
• Page Start: 6432
• Page End: 6438
• Publication Date: 2015-06
• Subjects: Nanocomposite -- TiO2 nanoparticles -- Polypyrrole–graphene -- NH3 sensor; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2015.01.081
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: 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 theTiO2 @PPy–GN nanocomposite were also investigated.