Coaxial Electrospinning of Tin Oxide to Improve Its Gas-Sensitive Properties

Abstract

SnO2 porous nanofibers doped with Cu were prepared using coaxial electrospinning technology. A solution of SnCl4 with [(5%) Cu(ch3coo)2] was spun with a quantity of organic polymer PVA at a concentration of 15% (w/v), used as the core, and confined with a PVA solution at the same concentration to form the shell. The applied electric potential was 24KV. Core and shell were spooned on collector formed from glass slides on aluminum foil. The spun fibers were heat-treated at 350°C to obtain (SnO2/Carbon) porous nanofibers. The energy band gap was calculated from the UV-VIS absorption spectrum, and it was found to be 2.86 eV. Atomic force microscopy (AFM) images were acquired to study the morphology of the (SnO2/Cu/Carbon) porous nanofibers. and the nanofiber diameter and surface roughness were calculated. The operating temperature of the prepared sensor was measured. The sensor's sensitivity was tested for H2S and H2 gases.