期刊
JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
卷 9, 期 1, 页码 318-326出版社
AMER SCIENTIFIC PUBLISHERS
DOI: 10.1166/jnn.2009.J036
关键词
Conducting Polymers; Polyaniline; Polyaniline/BaTiO3 Composites; Humidity Sensor
类别
资金
- Ministry of Knowledge and Economy (MKE) [KK-0803-E0]
An attempt has been made towards the synthesis of Polyaniline/BaTiO3 (PANI-BTO) composite with an objective to examine the possibility of using this composite for humidity sensing. In this work, PANI-BTO composites were synthesized by an in situ chemical oxidative polymerization of aniline in presence of BaTiO3 particles. These composites were characterized by X-ray diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy, Raman spectroscopy and scanning electron microscopy (SEM). The electrolyte pH significantly affects the synthesis of PANI-BTO composite. At lower pH, the formation of BaSO4 was observed in the composite which may be due to the leaching of Ba2+ ions from the surface of BaTiO3 particles in HCl medium. The exclusive formation of PANI-BTO composite without BaSO4 was achieved at higher pH (5.7). The PANI-BTO composites show better sensing properties than pure PANI, such as higher response factor and quicker response. The composites with 50 wt% of BaTiO3 exhibit an exponential relationship between the resistance and RH irrespective of electrolyte pH used for the synthesis.
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