Lecture
WEB Precursor Mediated Synthesis of Binary and Ternary Metal Chalcogenide Nanoparticles for Photocatalytic Applications
Thursday (24.09.2020) 15:00 - 15:15 Z: Special Symposia I Part of:TiO2 is a low-cost commercially available photocatalyst that is nontoxic and chemically stable in nature. It is highly efficient in the UV region of solar spectrum, which corresponds to absorption of only 5% of the total available photons of solar radiation. Its applicability in photocatalytic processes is further hampered by the recombination of photo generated electron/hole pairs. A common method to tackle this issue is to introduce defects in titania, which generally increases the absorption range but also diminishes the activity of titania. Alternatively, this research focuses on the coupling of titania with low bandgap metal chalcogenides to extend its absorption spectrum and to sensitize it for UV-vis driven photocatalysis [1,2]. A precursor-mediated approach is followed to prepare binary and ternary coinage metal chalcogenides under mild conditions. We also discuss the divergent reactivity of different starting reagents and reaction conditions that result in either molecular complexes or inorganic nanoparticles. Synthesis of metal chalcogenides-TiO2 nanocomposites with different molar ratios, their characterization with various physico-chemical techniques and their photocatalytic activity towards the degradation of formic acid under UV-vis radiation will be presented.
References:
[1] (a) S. Gahlot, E. Jeanneau, F. Dappozze,C. Guillard, S. Mishra, Dalton Trans. 47 (2018) 8897.; (b) S. Mishra, D. Du, E. Jeanneau, F. Dappozze,C. Guillard, J. Zhang, S. Daniele, Chem. Asian J. 11 (2016) 1658.
[2] S. Mishra, S. Daniele, Chem. Rev. 115 (2015) 8379.
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