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Metal‐Organic Framework Templated Synthesis ofg‐C3N4/Fe2O3@FeP Composites for Enhanced Hydrogen Production
Ist Teil von
ChemCatChem, 2019-08, Vol.11 (15), p.3465-3473
Ort / Verlag
Weinheim: Wiley Subscription Services, Inc
Erscheinungsjahr
2019
Link zum Volltext
Quelle
Alma/SFX Local Collection
Beschreibungen/Notizen
The simultaneous construction of heterostructures and co‐catalyst loading while maintaining a tight contact favoring charge transfer is important for improving the photocatalytic H2 production of g‐C3N4. Following this approach, we prepared herein a Fe2O3@FeP hybrid material by annealing and phosphidation of a g‐C3N4/Fe metal‐organic framework (MOF). The as‐prepared Fe2O3@FeP was used as both heterojunction and co‐catalyst material to enhance the photocatalytic H2 evolution performance of g‐C3N4 by water splitting under visible‐light irradiation. We developed an optimized g‐C3N4/Fe2O3@FeP‐60 catalyst with a H2 evolution rate as high as 12.03 mmol g−1 h−1 under Eosin Y (EY, 1.0 mmol L−1)‐sensitization. This rate was 12 times higher than that of pristine EY‐sensitized g‐C3N4 (0.97 mmol g−1 h−1). The apparent quantum efficiency (AQE) at 420 nm was 38.8 %. The improved photocatalytic activity of this composite compared to g‐C3N4 can be ascribed to: (i) its enhanced visible‐light absorption intensity; (ii) its efficient electron‐hole separation by the formation of a type‐II heterojunction with Fe2O3 and the loading of an electron collector such as FeP; and (iii) the accelerated H+ reductive reaction resulting from the FeP co‐catalyst. We believe that this work may pave the way for the construction of MOF‐based hybrid H2‐evolution photocatalysts.
Some fancy composites: g‐C3N4/Fe2O3@FeP photocatalyst with a H2 evolution rate of 12.03 and 1.48 mmol g−1 h−1, respectively with and without 1.0 mmol L−1 Eosin Y prepared by in situ annealing and phosphidation of g‐C3N4/Fe‐MOF hybrid was reported in this work.