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Research Highlight

Thin Wins - 2D Photocatalysts for Hydrogen Production

Interfacing a monolayer of Ti3C2 to g-C3N4 nanosheets greatly enhances the photocatalytic rate of water splitting for solar hydrogen production as compared to multilayer Ti3C2 and reduced graphene oxide (r-GO).

Scientific Achievement

Stacking a monolayer of Ti3C2MXene to g-C3N4 greatly enhances the photocatalytic efficiency of water splitting for solar hydrogen production over g-C3N4 alone.

Significance and Impact

Exploiting the unique electronic properties of a new family of metallic 2D MXenes opens a strategy in tuning the photocatalytic efficiency for noble metals free harvesting solar energy into fuels.

Research Details

– The 2D/2D heterostructures were built via electrostatic self-assembly of monolayer Ti3C2 with g-C3N4 nanosheets.
– The 2D/2D monolayer heterojunction of Ti3C2/g-C3N4 increases photocatalytic H2 production rate more than 10 times than that of pure g-C3N4.
– The large work function and the shorter charge transfer distance in 2D/2D monolayer heterojunction are the reasons for the improved photocatalytic performance .
 

T. Su, Z. D. Hood, M. Naguib, L. Bai, S. Luo, C. M. Rouleau, I. N. Ivanov, H. Ji, Z. Qin, and Z. Wu, “2D/2D Heterojunction of Ti3C2/g-C3N4 Nanosheets for Enhanced Photocatalytic Hydrogen Evolution," Nanoscale 2019.  DOI: 10.1039/c9nr00168a