Tollen's reagent assisted synthesis of hollow polyaniline microsphere/Ag nanocomposite and its applications in sugar sensing and electromagnetic shielding

作者：Panigrahi R; Srivastava S K^*

来源：Materials Research Bulletin, 2015, 64: 33-41.

DOI：10.1016/j.materresbull.2014.12.035

• Composites
• Chemical synthesis
• Electrochemical measurements
• Infrared spectroscopy
• X-ray diffraction

The present study is focused on synthesis of polyaniline hollow microspheres (PnHM) nanocomposites of silver (Ag) i.e., PnHMAg by emulsion polymerization of aniline and Tollen's reagent as a source for Ag nanoparticles. X-ray diffraction (XRD) and transmission electron microscopy (TEM) analysis of PnH1ViAg indicated presence of silver nanoparticles dispersed on polyaniline surface. The electrical conductivity of PnHMAg is increased by similar to 6 times compared to PnHM. Cyclic voltammogram of PnHM in sugar sensing exhibits characteristics redox peaks at similar to 0.09 (sugar) and similar to 0.53V (polyaniline). Interestingly, PnHMAg showed a single peak at similar to-0.18 V with increased intensity (similar to 5 times) indicating its high sugar sensing ability. PnHMAg also exhibits high shielding efficiency of 19.5 dB (11.2 GHz) due to the presence of highly conducting Ag nanoparticles. TEM studies confirmed that Ag nanoparticles are well distributed on PnHM. As a result, a continuous electronic path is developed due to enhanced interconnectivity of PnHM.

• 出版日期2015-4