V2O5/polypyrrole core-shell nanotubes for Gas sensor

Polypyrrole-coated V₂O₅ nanotubes hybrid materials have been synthesized through an in situ polymerization of pyrrole monomers in the presence of prepared V₂O₅ nanotubes. The hybrids were characterized by scanning electron microscopy (SEM) and transmission electron microscopy (TEM). Experimental data showed that polypyrrole was uniformly coated on the surface of the V₂O₅ nanotubes, and the polypyrrole coating is 30 nm thick. Gas sensing tests showed that the hybrids possessed very high sensitivity to ethanol gas at room temperature, implying its potential application for gas sensors.