Investigation of Gas Sensing Materials SnO2/In2O3 Composite Nanofibers Treated by Oxygen Plasma

SnO2/In2O3 composite nanofibers were synthesized by using an electrospinning system with double jets, then, treated by oxygen plasma. The morphology and structure of treated composite nanofibers were analyzed by SEM and XRD. The treated composite nanofibers showed more irregular and rough. The porosity of the treated composite nanofibers was bigger than the one of untreated. The gas sensing properties of the composite nanofibers to formaldehyde were measured before and after materials treated by oxygen plasma. The treated composite nanofibers exhibit large response values. Cross-responses and humidity effection of the treated composite nanofibers sensor were tested. The sensing mechanism of the SnO2/In2O3 composite nanofibers gas sensor treated by oxygen plasma was briefly analyzed.