High Performance VOCs Sensor Based on ɣ-Fe2O3/Al-ZnO Nanocomposites
In this study, ternary ɣ-Fe2O3/Al-ZnO nanocomposites (NC) ware prepared using the solvothermal sol-gel process and a successive supercritical drying in ethanol. SEM analysis of the ternary NC samples showed clearly that they are formed by very small nanoparticles in the nanometer range. XRD highlighted the presence of the characteristic diffraction peaks of ɣ-Fe2O3 and ZnO phases in all samples. Conductometric sensors were fabricated and tested for the monitoring of acetone in air. Results obtained have demonstrated that the ternary composite-based sensors display higher response to acetone and ethanol compared to that obtained with Al-ZnO and ɣ-Fe2O3 ones.
Keywordsɣ-Fe2O3 Al-ZnO Composite nanoparticles Sol-gel Acetone Selectivity