期刊
DALTON TRANSACTIONS
卷 48, 期 15, 页码 5083-5089出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c9dt00013e
关键词
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资金
- key project of Education Department of Liaoning Province [L2017LZD005]
- National Natural Science Foundation of China [41701364]
- Liaoning Doctoral Priming Fund Project [201601333, 20170520109]
- Supercomputing Center of Dalian University of Technology
In this work, three-dimensional macroporous lithium doped graphitic carbon nitride was synthesized. XRD, N-2 adsorption, SEM, XPS, UV-Vis spectroscopy, N-2-TPD and photoluminescence were used to characterize the prepared catalysts. The result shows that lithium exists as a coordinative Li-N bond, which can chemisorb and activate N-2 molecules, and promote the electron transfer from the catalyst to the nitrogen molecules. The as-prepared lithium doped g-C3N4 shows a NH4+ production rate of 4.8 mg L-1 h(-1) g(cat)(-1), which is 20 times that of bulk g-C3N4. Density functional theory (DFT) simulations show that lithium doping can not only increase the N?N bond length, which activates N-2 molecules, but also promote the electron-hole separation efficiency of g-C3N4.
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