量子点
石墨烯
光催化
离域电子
苝
光化学
电子转移
材料科学
石墨烯量子点
纳米技术
化学
分子
有机化学
催化作用
作者
Jun Yang,Hong Miao,Jianfang Jing,Yongfa Zhu,Wonyong Choi
标识
DOI:10.1016/j.apcatb.2020.119547
摘要
Herein, perylene bisimide supramolecular (PDI) and graphene quantum dots (GQDs) were successfully layer-by-layer assembled via electrostatic interaction. The apparent rate constant of photocatalytic reaction for phenol degradation of GQDs/PDI-14 % (0.018 min−1) was 4.73 times as high as nano PDI under visible light. Besides, the rate of H2 production of GQDs/PDI-14 % (1.6 mmol g−1· h−1) was 1.88 times over that of pure PDI. GQDs is helpful for the electrons delocalization via π-π action with PDI. Moreover, the quantum confinement effect of GQDs promotes electron transfer from GQDs to PDI, which helps the conduction band of PDI shift to more negative position and further enhance the reduction ability of PDI. The work may afford some interesting ideas for designing efficient quantum dots-modified supramolecular organic photocatalysts.
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