期刊
JOURNAL OF COLLOID AND INTERFACE SCIENCE
卷 579, 期 -, 页码 455-462出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcis.2020.06.064
关键词
Two-dimensional; Graphitic carbon nitride; Photocatalytic; Persulfate activation; Bisphenol A
资金
- National Natural Science Foundation of China [51722811, 51978372, 51978373]
- National Key R&D Program of China [2019YFA0705802]
Two-dimensional (2-D) exfoliated nanomaterials have attracted tremendous attentions because of the unique surface structures and increased reactive sites for various applications. Herein, a one-step pyrolysis method was used to fabricate ultrathin C3N4 photocatalysts, which had significant advantages over conventional post-exfoliation strategies with labor-intensive and time-consuming procedures. We found that oxygen doping by atmospheric air could effectively break the interlayer and intralayer interactions in polymeric C3N4, forming 2-D ultrathin nanocatalysts with high activity for persulfate activation. The integration of photocatalysis and persulfate oxidation resulted in 21- and 15-fold enhancement in the degradation of Bisphenol A pollutants compared to the individual reactions. The significant contributions of atmospheric oxygen doping to the charge separation and surface reactions were fundamentally investigated. This work not only provides a facile strategy to exfoliate polymeric semiconductor into ultrathin nanostructures, but also reveals valuable insight into the exploration of high-performance catalysts for the synergistic removal of environmental contaminants. (C) 2020 Published by Elsevier Inc.
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