Journal
ADVANCED FUNCTIONAL MATERIALS
Volume 30, Issue 31, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adfm.202002353
Keywords
active species; antibiotic; catalytic mechanisms; graphitic carbon nitride; photocatalytic behaviors
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Funding
- National Natural Science Foundation of China [21975245, 51972300, 61674141, 51978052]
- National Key Research and Development Program of China [2017YFA0206600, 2018YFE0204000]
- Key Research Program of Frontier Science, CAS [QYZDB-SSW-SLH006]
- Strategic Priority Research Program of Chinese Academy of Sciences [XDB43000000]
- Youth Innovation Promotion Association, Chinese Academy of Sciences [2020114]
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Graphitic carbon nitride (g/C3N4) is of promise as a highly efficient metal-free photocatalyst, yet engineering the photocatalytic behaviours for efficiently and selectively degrading complicated molecules is still challenging. Herein, the photocatalytic behaviors of g/C(3)N(4)are modified by tuning the energy band, optimizing the charge extraction, and decorating the cocatalyst. The combination shows a synergistic effect for boosting the photocatalytic degradation of a representative antibiotic, lincomycin, both in the degradation rate and the degree of decomposition. In comparison with the intrinsic g/C3N4, the structurally optimized photocatalyst shows a tenfold enhancement in degradation rate. Interestingly, various methods and experiments demonstrate the specific catalytic mechanisms for the multiple systems of g/C3N4-based photocatalysts. In the degradation, the active species, including center dot O-2(-), center dot OH, and h(+), have different contributions in the different photocatalysts. The intermediate, H2O2, plays an important role in the photocatalytic process, and the detailed functions and originations are clarified for the first time.
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