https://scholars.lib.ntu.edu.tw/handle/123456789/632025
標題: | Tailoring Advanced N-Defective and S-Doped g-C3N4 for Photocatalytic H2 Evolution | 作者: | Wang, Haitao Jiang, Jizhou Yu, Lianglang Peng, Jiahe Song, Zhou Xiong, Zhiguo Li, Neng Xiang, Kun Zou, Jing JYH-PING HSU Zhai, Tianyou |
關鍵字: | g-C N 3 4 | N-defects | photocatalytic H evolution 2 | S-doping | theoretical analysis | 公開日期: | 1-一月-2023 | 出版社: | WILEY-V C H VERLAG GMBH | 來源出版物: | Small | 摘要: | Although challenges remain, synergistic adjusting various microstructures and photo/electrochemical parameters of graphitic carbon nitride (g-C3N4) in photocatalytic hydrogen evolution reaction (HER) are the keys to alleviating the energy crisis and environmental pollution. In this work, a novel nitrogen-defective and sulfur-doped g-C3N4 (S-g-C3N4-D) is designed elaborately. Subsequent physical and chemical characterization proved that the developed S-g-C3N4-D not only displays well-defined 2D lamellar morphology with a large porosity and a high specific surface area but also has an efficient light utilization and carriers-separation and transfer. Moreover, the calculated optimal Gibbs free energy of adsorbed hydrogen (ΔGH*) for S-g-C3N4-D at the S active sites is close to zero (≈0.24 eV) on the basis of first-principle density functional theory (DFT). Accordingly, the developed S-g-C3N4-D catalyst shows a high H2 evolution rate of 5651.5 µmol g−1 h−1. Both DFT calculations and experimental results reveal that a memorable defective g-C3N4/S-doped g-C3N4 step-scheme heterojunction is constructed between S-doped domains and N-defective domains in the structural configuration of S-g-C3N4-D. This work exhibits a significant guidance for the design and fabrication of high-efficiency photocatalysts. |
URI: | https://scholars.lib.ntu.edu.tw/handle/123456789/632025 | ISSN: | 16136810 | DOI: | 10.1002/smll.202301116 |
顯示於: | 化學工程學系 |
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