Journal
JOURNAL OF HAZARDOUS MATERIALS
Volume 384, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.jhazmat.2019.121247
Keywords
Graphitic carbon nitride; Metal-to-ligand; Nitrogen vacancy; Photocatalysis; Bisphenol A
Categories
Funding
- National Natural Science Foundation of China [51778295, 51678306, 51478223]
- China Postdoctoral Science Foundation [2017T100372, 2016M590458, 2013M541677]
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As an environmentally friendly and promising semiconductor, graphitic carbon nitride (g-C3N4) was widely used in photocatalytic treatment of aqueous organic pollutants. In this study, cobalt-to-oxygen doped graphitic carbon nitride with feeble nitrogen vacancies (Co-OCNVN) as metal-to-ligand charge transfer was synthesized via a facile thermal polymerization method with low cost and non-toxic precursors. The oxygen doped graphitic carbon nitride with feeble nitrogen vacancies (OCNVN) ligand was successfully formed and cobalt was presented in OCNVN in an ionic form (in the form of Co2+-N-x). The cobalt atoms were chemically coordinated to the OCNVN matrix rather than forming cobalt oxide on the surface of OCNVN. The embedded cobalt atoms maintained the absorption margin of ligand OCNVN (up to 700 nm) and served as the separation centers to promote the interfacial electron transfer as well. Due to the synergistic effects of the embedded cobalt atoms and oxygen doping, the Co-OCNVN showed an outstanding activity for the visible-light photocatalytic oxidation of endocrine disruptor bisphenol A (BPA).
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