کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6454119 | 1418813 | 2017 | 9 صفحه PDF | دانلود رایگان |
- The OH-GQDs/mpg-C3N4 composites exhibited efficiently photocatalytic activity due to synergetic effect of mpg-C3N4 and OH-GQDs.
- The OH-GQDs acting as electron scavenger uniformly on the multiple-layer structure of mpg-C3N4 sheets.
- The superoxide radical was determined to be the main active species.
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 0.5Â wt% GQDs/mpg-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 GQDs/mpg-C3N4 composites can generate more O2â species and a small fraction of holes for photocatalytic degradation.
Hydroxyl-graphene quantum dots (GQDs) modified mesoporous carbon nitride (mpg-C3N4) composites was fabricated by electrostatic interactions. GQDs not only uniform dispensed on the surface of mpg-C3N4, but also acted as electron transfer channels, which is efficient to enhance the photocatalytic activity. According to the ESR investigation and some trapping experiment, O2â is the main active species for photodegradation of pollutants.98
Journal: Applied Catalysis B: Environmental - Volume 207, 15 June 2017, Pages 429-437