van der Waals type II carbon nitride homojunctions for visible light photocatalytic hydrogen evolution
نویسندگان
چکیده
Photocatalytic hydrogen evolution reaction (PC-HER) provides a solution to energy crisis and environmental pollution. Herein, different graphitic carbon nitride (g-C3N4)-based van der Waals (vdW) type II homojunctions have been fabricated g-C3N4/K-doped g-C3N4 nanosheets an outstanding PC-HER rate of 1,243 µmol-h?1·g?1 under visible light, higher than that bulk g-C3N4, doped nanosheets, mixed nanosheets. The enhanced performance can be ascribed the cooperative effects shortened bandgap, enlarged specific surface area, matched band structure, “face face” vdW charge interaction, peculiarly partite positions conduction valence bands in layers. Besides, junctions were found superior binary junction. This study highlights synergistic effect strategies improving capacities especially application particular junctions, new insights structures mechanism.
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ژورنال
عنوان ژورنال: Nano Research
سال: 2021
ISSN: ['1998-0000', '1998-0124']
DOI: https://doi.org/10.1007/s12274-021-3744-x