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Synthesis, characterization and hydrogen gas sensing of ZnO/g-C3N4 nanocomposite
* 1 , 2 , 1 , 3
1  IIT Bombay
2  IIT Bombay Monash Research Academy
3  Monash University
Academic Editor: Stefano Mariani (registering DOI)

This Paper describes for the first time incorporation of ZnO nanorods on porous graphitic carbon nitride (g-C3N4) matrix for the efficient hydrogen gas sensing. Researchers have explored g-C3N4 for various applications such as a catalyst for water splitting, photoluminescence, storage because of its relatively low cost, easy synthesis, and ready availability. For the synthesis of g-C3N4, urea was used as a precursor at 550-600 °C and at ambient pressure under a muffle furnace without add-on support. ZnO nanorods were synthesis by the direct thermal pyrolysis of Zinc acetate hexahydrate. g-C3N4 and ZnO/g-C3N4 were characterized by X-ray diffraction (XRD), X-ray Photoelectron Spectroscopy (XPS), scanning electron microscope (SEM), transmission electron microscopy (TEM), Photoluminescence spectroscopy (PL), Fourier transform infrared spectroscopy (FTIR), and energy-dispersive X-ray spectroscopy (EDS). ZnO/g-C3N4 film was deposited on an interdigitated carbon electrode. Significant change in the resistance was observed during the presence and absence of hydrogen gas. The response and recovery time of the sensor were calculated for the sensor at various different concentrations of analyte gases.

Keywords: g-C3N4; ZnO/g-C3N4; Hydrogen gas sensing