期刊
DALTON TRANSACTIONS
卷 47, 期 43, 页码 15382-15390出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c8dt02893a
关键词
-
资金
- National Natural Science Fund of China [21806059]
- China Postdoctoral Science Foundation [2018M630524, 2018M630487]
- Natural Science Foundation of Jiangsu Higher Education institution [17KJB610006]
- Jiangsu Distinguished Professor Project
- Natural Science Foundation of Jiangsu Province [BK20170939, BK20170938]
Graphitic carbon nitride (g-C3N4) is a low cost photocatalyst for the visible light-driven degradation of aqueous organic pollutants. Nevertheless, the fast recombination of electron-hole pairs significantly inhibits its photocatalytic activity. Consequently, we report a novel strategy in which the low cost -Fe2O3 photocatalyst is in situ introduced to accelerate the photogenerated charge separation of g-C3N4 based on a Z-scheme mechanism. Under the irradiation of visible light, the photocatalytic activity significantly improved on coupling g-C3N4 and -Fe2O3, and a peak Rhodamine B (RhB) degradation efficiency of over 99% were observed. This value is significantly higher than that over pure g-C3N4 (ca. 67%) and -Fe2O3 (ca. 6%). Additionally, the as-prepared g-C3N4/Fe2O3 exhibits highly stable photocatalytic activity. The loading of -Fe2O3 on the g-C3N4 surface results in the formation of a direct solid-state Z-scheme structure. The improved separation of electron-hole pairs and strong redox ability of the charge carriers are responsible for the improved photocatalytic activity of g-C3N4/Fe2O3. Finally, the h(+) and O-2(-) radicals are confirmed as the major oxidation species and a possible photocatalytic mechanism is proposed in the g-C3N4/Fe2O3 reaction system. This work is of significance to promote the large-scale application of g-C3N4-based photocatalysts in water purification.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据