Ultrathin g-C3N4 Nanosheets Coupled with AgIO3 as Highly Efficient Heterostructured Photocatalysts for Enhanced Visible-Light Photocatalytic Activity
Ultrathin g-C3N4 Nanosheets Coupled with AgIO3 as Highly Efficient Heterostructured Photocatalysts for Enhanced Visible-Light Photocatalytic Activity
复制标题
超薄 g-C3N4 纳米片与 AgIO3 耦合作为高效异质结构光催化剂，增强可见光光催化活性
DOI：
10.1002/chem.201502945
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发表时间：
2015-12-01
影响因子：
4.3
通讯作者：
Li, Mei
中科院分区：
文献类型：
--
作者：
Li, Yunfeng;Li, Kai;Li, Mei
类石墨氮化碳（g-C3N4）的光催化活性可以通过异质结策略通过提高电荷分离效率来增强。作为一种基于表面的过程，如果异质结界面存在更大的接触区域，异质光催化过程将变得更加有效。在这项工作中，采用具有更大比表面积的超薄g-C3N4纳米片（g-C3N4-NS）代替块状g-C3N4（g-C3N4-B）来制备AgIO3/g-C3N4-NS纳米复合光催化剂。利用这一特性，所制备的复合材料在可见光照射下的光催化废水处理中表现出卓越的性能。值得注意的是，AgIO3/g-C3N4-NS复合材料对罗丹明B和甲基橙污染物的降解活性分别比纯g-C3N4-B高出近80.59和55.09倍。最后，还研究了AgIO3/g-C3N4-NS系统的稳定性和可能的光催化机理。
The photocatalytic activity of graphite-like carbon nitride (g-C3N4) could be enhanced by heterojunction strategies through increasing the charge-separation efficiency. As a surface-based process, the heterogeneous photocatalytic process would become more efficient if a larger contact region existed in the heterojunction interface. In this work, ultrathin g-C3N4 nanosheets (g-C3N4-NS) with much larger specific surface areas are employed instead of bulk g-C3N4 (g-C3N4-B) to prepare AgIO3/g-C3N4-NS nanocomposite photocatalysts. By taking advantage of this feature, the as-prepared composites exhibit remarkable performances for photocatalytic wastewater treatment under visible-light irradiation. Notably, the optimum photocatalytic activity of AgIO3/g-C3N4-NS composites is almost 80.59 and 55.09 times higher than that of pure g-C3N4-B towards the degradation of rhodamine B and methyl orange pollutants, respectively. Finally, the stability and possible photocatalytic mechanism of the AgIO3/g-C3N4-NS system are also investigated.