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Construction of upconversion nitrogen doped graphene quantum dots modified BiVO4 photocatalyst with enhanced visible-light photocatalytic activity
【文件类型】 【消费金额】2.7 【文章页数】9 【会员操作】  
【文章作者】Wu, Chunxia;Chen, Rongru;Ma, Changchang;Cheng, Rujia;Gao, Xin;Wang, Tao;Liu, Yang;Huo, Pengwei;Yan, Yongsheng
【文章摘要】      A direct and facile "bottom-up" approach was carried out to prepare nitrogen doped graphene quantum dots (NGQDs) under hydrothermal conditions. The as-synthesized NGQDs exhibited an excellent excitation-independent upconversion and downconversion photoluminescent (PL) behavior. And further, the NGQDs/BiVO4 composite photocatalysts were also fabricated to investigate enhanced visible-light photocatalytic performance. The addition of NGQDs in the NGQDs/BiVO4 could improve the photocatalytic performance, and the results indicated 5.0 wt% NGQDs/BiVO4 composites showed the optimal photocatalytic performance. The quenching of effects of different scavengers demonstrated that superoxide radical played a major role in MB degradation. A possible mechanism that NGQDs could enhance the photocatalytic performance of NGQDs/BiVO4 composites had been also proposed. It was estimated that the photocatalytic performance of the NGQDs/BiVO4 composites for the degradation of MB under visible light could be primarily ascribed to upconversion PL character of NGQDs and the efficient separation of photogenerated electrons and holes.
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【卷】45【ISSUE】2 Pt.A【ISSUEID】815C0073    【文章期份】2019    【发布日期】2019/8/27 11:25:37    点击率:8    打印    关闭
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