Abstract
Graphitic carbon nitride (g-C3N4) was synthesized from three different precursors such as urea, thiourea and mixture of urea and thiourea containing each in the ratio 1:1. The variation in the thermal decomposition and condensation pathways of precursors led to the formation of g-C3N4 with different morphological and photophysical aspects. These were loaded upon TiO2/bentonite nanocomposite to make it visible active. The g-C3N4 synthesized from urea (UC3) was found to be highly influential sensitizer due to its thin and long nanosheet-like morphology, and the nanocomposite prepared by loading of g-C3N4 on TiO2/bentonite (UC3TB) effectively degraded about 85% of the reactive brilliant red-X3BS (RBR-X3BS) dye under visible light irradiation. The high activity was attributed due to the high surface area and pore volume of the nanocomposite along with effective charge separation.
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Acknowledgements
Authors are thankful to DST (Grant No: SB/FT/CS-178/2013), New Delhi for fellowship as well as other financial assistance and BRNS (Grant No: 34/14/63/2014) for providing BET instrumental facilities.
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: Supporting information contains; (i) UV–Visible diffuse reflectance spectra and tauc plot of TiO2/bentonite nanocomposite (ii) N2 adsorption–desorption isotherm and BJH plot of TiO2/bentonite and raw bentonite, (iii) HRTEM images of TiO2/bentonite nanocomposite with size distribution of TiO2, (iv) and (v) elemental mapping of UC3TB and TUC3TB nanocomposites and (vi) UV–Visible spectra of RBR-X3BS (40 ppm) during photocatalytic degradation at various time intervals. (DOCX 3548 kb)
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Mishra, A., Mehta, A., Kainth, S. et al. A comparative study on the effect of different precursors for synthesis and efficient photocatalytic activity of g-C3N4/TiO2/bentonite nanocomposites. J Mater Sci 53, 13126–13142 (2018). https://doi.org/10.1007/s10853-018-2565-0
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DOI: https://doi.org/10.1007/s10853-018-2565-0