Nanocomposites of sub-10 nm SnO2nanoparticles and MWCNTs for detection of aldrin and DDT

Abstract

The preparation of materials with size and porosity in the nanometre range is of technological importance for a wide range of sensing applications. Here, the ultrasensitive detection of Persistent Organic Pollutants (POPs), i.e., Aldrin and DDT, has been investigated using a sub-10 nm SnO₂/MWCNT nanocomposite-based gas sensor. The features of prepared nanocomposites are carefully studied using SEM, TEM, and Raman spectroscopy. The sensing material shows a very attractive improved sensitivity compared to a conventional SnO₂ sensor. One major advantage of this sensing material is the stable attachment between SnO₂ nanoparticles and carbon nanotubes. Accordingly, facile preparation, high sensitivity, long-term stability, and nanoscale effects in this composite can create novel avenues and applications for fabricating important POPs sensors.