Journal
APPLIED CATALYSIS B-ENVIRONMENTAL
Volume 272, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.apcatb.2020.118897
Keywords
pi-pi Interaction; 3D structure; Photoelectric degradation; PDI; rGO
Funding
- Chinese National Science Foundation [21437003, 21673126, 21761142017, 21621003]
- Collaborative Innovation Center for Regional Environmental Quality
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Perylene diimide (PDI) anchored graphene three-dimensional (3D) structure was constructed via a simple electrodeposition-impregnation strategy. The photoelectrochemical catalysis removal rate is 8.2 or 4.5 times that of the only photo- or electro- catalysis. In dynamic degradation, the methylene blue removal ratio is 88.5 % for PDI/rGO catalyst, much higher than pure PDI (56.3 %). The stability is very high, and the activity did not decrease over 55 h. The enhanced photoelectrochemical degradation ability is mainly attributed to the pi-pi interaction between PDI and rGO. PDI nanorods as photocatalytic building blocks are anchored uniformly on the surface of 3D graphene via pi-pi stacking. The promoted separation and mobility of carriers are related to the extended electron delocalization along the pi-pi stacking direction. Besides, the 3D structure with a high BET area (176 m(2)/g) enables the adsorption-enrichment capability and possesses the advantage of separation free and high stability.
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