分子内力
纳米片
材料科学
石墨氮化碳
接受者
光催化
氮化碳
带隙
载流子
纳米技术
吸收(声学)
光化学
光电子学
催化作用
化学
有机化学
物理
凝聚态物理
复合材料
作者
Weiyi Xing,Weifan Shao,Liting Tian,Y. Zhang,Jing Yang,Huanping Zhou,Jiangang Han,Guangyu Wu,G. Chen
标识
DOI:10.1016/j.mtchem.2022.100977
摘要
The insufficient visible light responsive region and fast charge recombination probability are still the key obstacles for designing high-performance photocatalytic system. Herein, a “One Stone, Two Birds” strategy was reported in three-dimensional (3D) hierarchical graphitic carbon nitride (g-C3N4) nanosheet with intramolecular donor-acceptor (D-A) motifs (3D CN) photocatalyst, which solved two urgent problems simultaneously. The 3D hierarchical nanosheets structure endowed 3D CN with abundantly exposed reaction active sites and cross-plane diffusion channels. The formation of internal D-A system facilitated the light absorption and accelerated the transfer and separation of charge carriers. Furthermore, the introducing of D-A motifs optimized the bandgap of g-C3N4 and negative-shifted conduction band position. The as-prepared 3D CN showed excellent visible-light photocatalytic H2 performance, with H2 evolution rate of 2521.2 μmol h−1/g, which was six times higher than the pristine CN. This outstanding performance was ascribed to the synergistic effect of 3D hierarchical nanosheets structure and intramolecular D-A motifs. This current work provides a novel insight to design and construct of 3D hierarchical CN nanostructures with D-A motifs simultaneously, which can be further promising applications for clean and sustainable energy conversion.
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