Electrical and gas sensing properties of TiO2/GO nanocomposites for CO2 sensor application

Abstract

Titanium dioxide (TiO2) nanostructures were prepared by time varied microwave assisted. The morphology of TiO2 nanostructures was studied by scanning electron microscopy (SEM), X-ray diffraction (XRD). SEM images revealed the agglomeration of TiO2 nanostructures with the size of 20-70 μm. The XRD patterns showed anatase phase of TiO2 with peaks of (101), (004), (200), (105), (211) and (204). The I-V characteristics exhibited the behavior of the ohmic and diode materials. The sensitivity which was measured under CO2 atmosphere at room temperature showed high sensitivity of TiO2/GO composites of 2.55 for 60 seconds.