Nano-Silver Mediated Polymerization of Pyrrole: Synthesis and Gas Sensing Properties of Polypyrrole (PPy)/Ag Nano-Composite

作者：Kate Kunal H; Damkale Shubhangi R; Khanna P K^*; Jain G H

来源：Journal of Nanoscience and Nanotechnology, 2011, 11(9): 7863-7869.

DOI：10.1166/jnn.2011.4708

• Nano-Particles
• Conducting Polymer
• Microwave
• Synthesis
• Gas Sensor

Thermal polymerization of pyrrole was performed using silver nitrate as source of silver ions followed by its conversion to Polypyrrole (PPy)/Ag nano-comoposites without using any external oxidizing agent or solvent. The formation of PPy was monitored by UV-Visible absorption spectroscopy showing a band at similar to 464 nm. XRD measurement confirmed characteristic peaks for face centered cubic (fcc) silver and presence of PPy at 2 theta of similar to 23 degrees suggesting the formation of PPy/Ag nanocomposite. Transmission electron microscopy (TEM) images showed non-aggregated spherical Ag nano-particles of about 5-10 nm. PPy/Ag thick film acts as a NH(3) sensor at 100 degrees C, a H(2)S sensor at 250 degrees C and CO(2) sensor at 350 degrees C. The thick films showed capability to recognize various gases at different operating temperature.

• 出版日期2011-9