Orientation controlled photogenerated carriers on self-supporting CdS/Ni3S2 paper toward photocatalytic hydrogen evolution and biomass upgrading
The appropriate regulation of band structure is an effective strategy in constructing efficient photocatalytic systems. Present photocatalytic system mainly employs powder photocatalysts, which makes their recovery reliant on expensive separation processes and severely limits their industrial application. Herein, we constructed a novel CdS/Ni(3)S2 heterostructure using free-standing and flexible nickel fiber paper as the matrix. The regulated energy band structure achieves effective electron-hole separation. The as-synthesized flexible photocatalyst exhibits considerable photocatalytic activity toward the H-2 evolution reaction under visible-light irradiation, with an H-2 production rate of 5.63 μmol·cm(-2)·h(-1) (14.1 mmol·g(cat)(-1)·h(-1) according to the catalyst loading content). Additionally, the otherwise-wasted excited holes simultaneously drive organic transformations to yield value-added organic products, thus markedly improving the photocatalytic H-2 evolution rate. Such a photocatalytic system is scaled up further, where a self-supported 20 cm x 25 cm sample achieves a champion H-2 production rate of 60-80 μmol·h(-1) under practical sun irradiation. This newly developed self-supported photocatalyst produces opportunities for practical solar H2 production with biomass upgrading.
WOS:001158627600002
2024-02-08
REVIEWED
EPFL
Funder | Grant Number |
Natural Science Foundation of Shandong Province | 51972147 |
National Natural Science Foundation of China | tsqn201812083 |
Taishan Scholars Project Special Funds | 2021GXRC019 |
Innovative Team Project of Jinan | ZR2019YQ20 |
Natural Science Foundation of Shandong Province | |
King Abdullah University of Science and Technology (KAUST) | |