Surface Engineering for Extremely Enhanced Charge Separation and Photocatalytic Hydrogen Evolution on g-C<sub>3</sub> N<sub>4</sub>.

Yu, Yu; Yan, Wei; Wang, Xiaofang; Li, Pei; Gao, Wenyu; Zou, Haihan; Wu, Songmei; Ding, Kejian · Adv Mater · 2018

basic_science · Level V

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Abstract

Reinforcing the carrier separation is the key issue to maximize the photocatalytic hydrogen evolution (PHE) efficiency of graphitic carbon nitride (g-C<sub>3</sub> N<sub>4</sub> ). By a surface engineering of gradual doping of graphited carbon rings within g-C<sub>3</sub> N<sub>4</sub> , suitable energy band structures and built-in electric fields are established. Photoinduced electrons and holes are impelled into diverse directions, leading to a 21-fold improvement in the PHE rate.