Calcination Method Synthesis of SnO2/g-C3N4 Composites for a High-Performance Ethanol Gas Sensing Application.

ABSTRACT: The SnO?/g-C?N? composites were synthesized via a facile calcination method by using SnCl?·5H?O and urea as the precursor. The structure and morphology of the as-synthesized composites were characterized by the techniques of X-ray diffraction (XRD), the field-emission scanning electron microscopy and transmission electron microscopy (FESEM and TEM), energy dispersive spectrometry (EDS), thermal gravity and differential thermal analysis (TG-DTA), and N?-sorption. The analysis results indicated that the as-synthesized samples possess the two dimensional structure. Additionally, the SnO? nanoparticles were highly dispersed on the surface of the g-C?N? nanosheets. The gas-sensing performance of the as-synthesized composites for different gases was tested. Moreover, the composite with 7 wt % g-C?N? content (SnO?/g-C?N?-7) exhibits an admirable gas-sensing property to ethanol, which possesses a higher response and better selectivity than that of the pure SnO2-based sensor. The high surface area of the SnO2/g-C3N4 composite and the good electronic characteristics of the two dimensional graphitic carbon nitride are in favor of the elevated gas-sensing property.

SUBMITTER: Cao J 

PROVIDER: S-EPMC5449979 | biostudies-literature | 2017 Apr

REPOSITORIES: biostudies-literature