Journal
NANOMATERIALS
Volume 7, Issue 10, Pages -Publisher
MDPI
DOI: 10.3390/nano7100285
Keywords
nanocomposites; microstructure; gas sensor; flower-like SnO2 nanorod; graphitic carbon nitride
Categories
Funding
- National Natural Science Foundation of China [51404097, 51504083, U1404613]
- Natural Science Foundation of Henan Province of China [162300410113]
- Program for Science & Technology Innovation Talents in Universities of Henan Province [17HASTIT029, 18HASTIT010]
- China Postdoctoral Science Foundation [2016M592290]
- Research Foundation for Youth Scholars of Higher Education of Henan Province [2016GGJS-040]
- Fundamental Research Funds for the Universities of Henan Province [NSFRF1606, NSFRF1614]
- Program for Innovative Research Team in University of Ministry of Education of China [IRT 16R22]
- Foundation for Distinguished Young Scientists of Henan Polytechnic University [J2016-2, J2017-3]
- State Key Laboratory Cultivation Base for Gas Geology and Gas Control (Henan Polytechnic University) [WS2017A03]
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Flower-like SnO2/g-C3N4 nanocomposites were synthesized via a facile hydrothermal method by using SnCl(4)5H(2)O and urea as the precursor. The structure and morphology of the as-synthesized samples were characterized by using the X-ray powder diffraction (XRD), electron microscopy (FESEM and TEM), and Fourier transform infrared spectrometer (FT-IR) techniques. SnO2 displays the unique 3D flower-like microstructure assembled with many uniform nanorods with the lengths and diameters of about 400-600 nm and 50-100 nm, respectively. For the SnO2/g-C3N4 composites, SnO2 flower-like nanorods were coupled by a lamellar structure 2D g-C3N4. Gas sensing performance test results indicated that the response of the sensor based on 7 wt. % 2D g-C3N4-decorated SnO2 composite to 500 ppm ethanol vapor was 150 at 340 degrees C, which was 3.5 times higher than that of the pure flower-like SnO2 nanorods-based sensor. The gas sensing mechanism of the g-C(3)N(4)nanosheets-decorated SnO2 flower-like nanorods was discussed in relation to the heterojunction structure between g-C3N4 and SnO2.
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