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

Abstract

The SnO2/g-C3N4 composites were synthesized via a facile calcination method by using SnCl4·5H2O 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 (SEM and TEM), energy dispersive spectrometry (EDS), thermal gravity and differential thermal analysis (TG-DTA), and N2-sorption. The analysis results indicated that the as-synthesized samples possess the two dimensional structure. Additionally, the SnO2 nanoparticles were highly dispersed on the surface of the g-C3N4nanosheets. The gas-sensing performance of the as-synthesized composites for different gases was tested. Moreover, the composite with 7 wt % g-C3N4 content (SnO2/g-C3N4-7) SnO2/g-C3N4-7 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.

Carbon Nitride Decorated Ball-Flower like Co3O4 Hybrid Composite: Hydrothermal Synthesis and Ethanol Gas Sensing Application

“…Figure 2e displays the typical TEM image of the Co 3 O 4 /pCNH composite. The morphology and microstructure of pCNH has been verified with thin layers in our previous paper [25]. It can be seen from Figure 2e that polymeric to graphitic carbon nitride (pCNH) support the Co 3 O 4 particles, and the Co 3 O 4 nanoparticles are highly dispersed on the surface of pCNH nanosheet, and the high surface area of pCNH nanosheet can suppress the sintering of Co 3 O 4 nanoparticles.…”

“…Chen et al reported that Co 3 O 4 -rGO nanoparticles showed a good response and recovery to methanol [24]. Cao et al synthesized the SnO 2 /g-C 3 N 4 composites with high performance to ethanol via a facile calcination method [25]. Actually, reports on Co 3 O 4 as gas sensor are limited, and there is no report on Co 3 O 4 decorated pCNH composite for gas sensor application.…”

The Effect of Eu Doping on Microstructure, Morphology and Methanal-Sensing Performance of Highly Ordered SnO2 Nanorods Array

“…Due to their excellent properties and novel applications in gas sensors, people have made great efforts to develop different nanostructured materials to improve the performances [6,7,8]. Especially, various novel nanostructures based on SnO 2 semiconducting oxides, such as nano films [9], hollow nanofibers [10], nanocomposites [11,12], porous architecture [13], and so on, have been extensively investigated as a promising candidate for gas sensing materials.…”

Highly Sensitive Acetone Gas Sensor Based on g-C3N4 Decorated MgFe2O4 Porous Microspheres Composites

“…Graphitic carbon nitride (g-C 3 N 4 ) was synthesized by our previous reported method [30,31]. MgFe 2 O 4 /g-C 3 N 4 composites were prepared by a facile solvothermal process.…”