Sun, Y; Sun, Y; Meng, X; Gao, Y; Dall'Agnese, Y; Chen, G; Dall'Agnese, C; Sun, Y; Sun, Y; Meng, X; Gao, Y; Dall'Agnese, Y; Chen, G; Dall'Agnese, C; Wang, XF; - view fewer (2019) Eosin Y-sensitized partially oxidized Ti₃C₂, MXene for photocatalytic hydrogen evolution. Catalysis Science & Technology , 9 (2) pp. 310-315. 10.1039/c8cy02240b.

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Abstract

Ti₃C₂, though one of the most extensively studied 2D MXenes, is rarely reported in dye-sensitized photocatalysis. Platinum is commonly used as a co-catalyst in photocatalytic hydrogen evolution but it increases the cost and hence restricts the commercialization of this technology. Eosin Y (EY) is widely studied in dye-sensitized systems as it is not only low-cost and easily commercially available, but also exhibits excellent visible light absorption ability. Herein, we oxidized Ti₃C₂ MXene in water at 60 °C for different times, to form TiO₂/Ti₃C₂ on amorphous carbon (AC) composites. The oxidized MXene was used as a photocatalyst in a dye-sensitized system for hydrogen evolution to replace noble metal co-catalysts such as Pt. The highest hydrogen production rate of 33.4 μmol h⁻¹ g⁻¹ was achieved by the TiO₂/Ti₃C₂ @AC-48h composite with the sensitization of 1 mM EY, which was 110 times higher than that of oxidized Ti₃C₂ without EY. This work shows the potential of 2D MXenes used in dye-sensitized photocatalysis for hydrogen evolution.

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