Journal
APPLIED CATALYSIS B-ENVIRONMENTAL
Volume 207, Issue -, Pages 429-437Publisher
ELSEVIER
DOI: 10.1016/j.apcatb.2017.01.071
Keywords
GQDs/mpg-C3N4 composites; Photocatalytic activity; Visible light
Funding
- National Nature Science Foundation of China [21476097, 21476098, 21671129]
- six talent peaks project in Jiangsu Province [2014-JNHB-014]
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Hydroxyl-graphene quantum dots (GQDs) modified mesoporous graphitic carbon nitride (mpg-C3N4) composites were fabricated through electrostatic interactions. A variety of techniques were applied to discuss systematic effect on the morphology, optical, electronic properties and structure of GQDs/mpg-C3N4 composites. Remarkably, the 0.5 wt% GQDsimpg-C3N4 composites exhibited higher photocatalytic activity than that of the pure mpg-C3N4 by using rhodamine B (RhB) and colorless tetracycline hydrochloride (TC) as pollutants under visible light irradiation. The results indicated that uniform dispersion of GQDs on the surface of mpg-C3N4 and intimate contact between the two materials contributed to the enhanced activity. Radical trapping experiments and electron spin resonance tests both certified that the GQDsimpg-C3N4 composites can generate more center dot O-2(-) species and a small fraction of holes for photocatalytic degradation. (C) 2017 Elsevier B.V. All rights reserved.
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