期刊
JOURNAL OF COLLOID AND INTERFACE SCIENCE
卷 603, 期 -, 页码 856-863出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcis.2021.06.159
关键词
Graphitic carbon nitride; Prussian blue; Photocatalysis; Peroxymonosulfate; bisphenol A
资金
- Zhejiang Province Basic Public Welfare Research Project [LGF19B070006]
- National Natural Science Foundation of China [21775138]
- Independent Designing Scientific Research Project of Zhejiang Normal University
The study developed a novel catalytic system by combining photocatalysis and PMS activation, which effectively degraded BPA, demonstrating the outstanding oxidation capacity and reusability of A-PB-g-C3N4.
Heterogeneous activation of peroxymonosulfate (PMS) is one of the most promising techniques for wastewater treatment. Herein, an ingenious system by coupling of photocatalysis and PMS activation was developed, using hollow-structured amorphous prussian blue (A-PB) decorated on graphitic carbon nitride (g-C3N4) as the catalyst. Degradation of bisphenol A (BPA) via the A-PB-g-C3N4 mediated PMS activation under visible light (Vis) was systematically investigated. Astonishingly, it was found that similar to 82.0%, 92.6%, 98.2% and 99.3% of BPA (40 mg/L) were removed within 2, 4, 6 and 7 min, respectively, suggesting the extremely strong oxidizing capacity of the A-PB-g-C3N4/PMS/Vis system. Synergistic effect between the decorated A-PB and the g-C3N4 substrate promoted the Fe(III)/Fe(II) redox cycling and facilitated the charge transfer at the A-PB/g-C3N4 heterojunction interface. As a result, both photocatalysis and heterogeneous activation of PMS were boosted in the A-PB-g-C3N4/PMS/Vis system, leading to the production of large amount of reactive oxygen species (ROS). The various ROS (SO4 center dot -, HO center dot, center dot O-2(-) and O-1(2)) was responsible for the ultrafast degradation of BPA. Moreover, the A-PB-g-C3N4 catalyst also exhibited outstanding reusability and stability, retaining 98.9% of the removal percentage for BPA after five consecutive reaction cycles. This study suggests that the A-PB-g-C3N4 can be an all-rounder to bridge photocatalysis and PMS activation, and shed a new light on the application of multiple ROS for the ultrafast elimination of micropollutants from wastewater. (C) 2021 Elsevier Inc. All rights reserved.
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