Construction of 2D/2D BiVO4/g-C3N4 nanosheet heterostructures with improved photocatalytic activity
Construction of 2D/2D BiVO4/g-C3N4 nanosheet heterostructures with improved photocatalytic activity
复制标题
构建具有改进光催化活性的2D/2D BiVO4/g-C3N4 纳米片异质结构
DOI：
10.1016/j.jcis.2018.08.071
复制
发表时间：
2019-01-01
影响因子：
9.9
通讯作者：
Wang, Anjie
中科院分区：
文献类型：
--
作者：
Sun, Zhichao;Yu, Zhiquan;Wang, Anjie
在这项工作中，成功构建了具有强界面相互作用的二维(2D)/2D BiVO4/g-C3N4异质结构。与原始的g-C3N4和BiVO4相比，制备的BiVO4/g-C3N4异质结构对Rodanmin B （RhB）的降解和水裂解为氧（O-2）的可见光催化性能明显增强，这可能是由于其强的界面相互作用和丰富的二维耦合界面，有利于有效的电荷分离。在不同配比的复合材料中，BiVO4-10/g-C3N4样品对RhB的光催化降解活性最佳，分别达到纯g-C3N4和BiVO4的15.8倍和4.3倍。在可见光照射下，复合材料的O-2产率高达0.97 mu mol h(-1)，分别是纯g-C3N4和BiVO4的12.1倍和2.8倍。结果表明，电子空穴分离效率对BiVO4/g-C3N4异质结构的光催化性能有一定的贡献。本研究表明，独特的2D/2D BiVO4/g-C3N4杂化纳米片有利于提高有机污染物降解和水分解的光催化性能。(C) 2018爱思唯尔公司版权所有。
In this work, a two dimensional (2D)/2D BiVO4/g-C3N4 heterostructure with strong interfacial interaction was successfully constructed. The as-prepared BiVO4/g-C3N4 heterostructures exhibit distinctly enhanced visible light photocatalytic performance toward the degradation of Rodanmin B (RhB) and water splitting to oxygen (O-2) as compared to pristine g-C3N4 and BiVO4, which can be attributed to the strong interfacial interaction and abundant 2D coupling interfaces, facilitating efficient charge separation. Among the composites with various ratios, the BiVO4-10/g-C3N4 sample achieves the optimum photocatalytic activity for the degradation of RhB, and reached 15.8 and 4.3 times compared to pure g-C3N4 and BiVO4. Moreover, the corresponding composite reached a high O-2 -production rate of 0.97 mu mol h(-1) under visible light irradiation, which is 12.1 and 2.8 times higher than that of pure g-C3N4 and BiVO4, respectively. It was demonstrated that the efficiency of electron-hole separation has certain contribution to the photocatalytic performance over the BiVO4/g-C3N4 heterostructure. The present study suggests that the unique 2D/2D BiVO4/g-C3N4 hybrid nanosheets should be conducive to improve the photocatalytic performance of organic pollutant degradation and water splitting. (C) 2018 Elsevier Inc. All rights reserved.