Novel g-C3N4/g-C3N4 S-scheme isotype heterojunction for improved photocatalytic hydrogen generation

By Quanlong Xu, Dekun Ma, Shuibin Yang, Z. Tian, B. Cheng, Jiajie Fan. Applications of Surface Science, 2019

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Abstract Rationally designing heterostructure is a promising way to promote the charge carrier separation of intrinsic photocatalysts, thus contributes the improvement of solar to chemical energy conversion. Herein, a novel isotype heterojunction consisted of MCN and UCN, respectively derived from hydrothermally-treated melamine and urea, was synthesized. Owing to the well compatibility and matched band structure, an S-scheme charge transfer mechanism is confirmed for working on MCN/UCN isotype heterojunction, thus endowing strong redox ability, efficient charge carrier separation efficiency and prolonged lifetime. As a result, MCN/UCN exhibits improved photocatalytic water splitting activity under visible light irradiation, which displays approximately 5.5 and 1.8-fold enhancement as compared to the pure MCN and UCN, respectively. The rationally synthesized S-scheme isotype heterojunction will pave the way for developing highly efficient g-C3N4-based photocatalysts.

Subfields: Electrical and Electronic Engineering, Materials Chemistry, Renewable Energy, Sustainability and the Environment

View Paper: https://www.semanticscholar.org/paper/1acde5999ac7317eca5d2d7fefc1f6bbcba50176