Synthesis and Characterization of Nickel Ferrite (NiFe2O4) Nanoparticles with Silver Addition for H2S Gas Detection

摘要

The fabrication and testing of H2S gas sensors using nickel ferrite (NiFe2O4) nanoparticles and silver is presented here. The nanoparticles were prepared by chemical co-precipitation and silver was added by impregnation. The sensor response was measured at different H2S concentrations. At 200ppm H2S, results indicate a 0.18 efficiency as compared to 0.45 for NiFe2O4 and NiFe2O4-5% wt. Ag, respectively. Characterization by powder XRD indicates an average NP size of 11~39 nm. Electron Microscopy in Scanning and Transmission mode indicates agglomerates with sponge-like structure and twodimensional slabs.