Hydrothermal synthesis of graphitic carbon nitride–BiVO4 composites with enhanced visible light photocatalytic activities and the mechanism study
作者： Feng Guo , Weilong Shi , Xue Lin , Guangbo Che
DOI: 10.1016/J.JPCS.2014.05.011
关键词:
摘要: Abstract Novel graphitic carbon nitride (C3N4) and bismuth vanadate (BiVO4) composite photocatalysts were successfully synthesized by a facile hydrothermal method. The scanning electron microscopy (SEM) revealed that an intimate interface between C3N4 BiVO4 formed in the composites. Compared with pure BiVO4, C3N4–BiVO4 showed remarkably higher photocatalytic activities degrading rhodamine B (Rh B). best active heterojunction proportion was 0.5C3N4–0.5BiVO4. Over this catalyst, 100% degradation of Rh (0.002 mmol L−1) obtained under visible light irradiation (λ>420 nm) for 40 min. species examined adding series scavengers. study on mechanism electrons injected directly from conduction band to resulting production superoxide radical (O2•−) hydroxyl (OH•) BiVO4. Simultaneously, rich holes valence g-C3N4 oxidized promote reaction.
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