Photocatalytic overall water splitting promoted by SnOx-NiGa2O4 photocatalysts
Photocatalytic overall water splitting promoted by SnOx-NiGa2O4 photocatalysts
复制标题
SnOx-NiGa2O4光催化剂促进光催化整体水分解
DOI：
10.1016/j.apcatb.2015.09.032
复制
发表时间：
2016
影响因子：
22.1
通讯作者：
Lv XJ
中科院分区：
文献类型：
--
作者：
Lv;Xiao-Jun;Zhou;Shixiong;Huang;Xing;Wang;Chuanjun;Fu;Wen-Fu;Lv Xiao-Jun;Huang Xing;Wang Chuanjun;Fu Wen-Fu;Zhou Shixiong;Lv XJ
整体水分解是半导体光催化剂的巨大挑战。本文研究了SnOx-NiGa_2 O_4（SNG）复合光催化剂的高效光催化活性。由于SnOx-NiGa 2 O 4复合材料中有效的电荷分离和转移，优化后的复合光催化剂的光催化活性比NiGa 2 O 4（NGO）和SnOxalone分别高出一个数量级以上。此外，在可见光照射下，光催化剂也表现出良好的光催化析氢和降解污染物的潜力。更重要的是，我们进一步阐明了异质结构中SnOx和NiGa 2 O 4之间的带隙关系，并对异质结构中基于能带排列的电荷分离机制有了更深入的理解.我们的研究表明，SnOx-NiGa 2 O 4复合材料是一个有吸引力的光催化剂的整体水裂解或污染降解在可见光照射下的巨大潜力。
Overall water splitting is a huge challenge for the semiconductor photocatalysts. Herein, we investigated the high effective photocatalytic overall water stoichiometrically splitting into H2and O2activity using the SnOx–NiGa2O4(SNG) composites photocatalysts. Because of the effective charge separation and transfer in SnOx–NiGa2O4composites, the photocatalytic activity of the optimized composites photocatalysts can reach up to more than one order of magnitude greater than that of NiGa2O4(NGO) or SnOxalone respectively. In addition, under visible light irradiation the photocatalysts also displayed well both photocatalytic hydrogen evolution and pollution degradation potentials. More importantly, we further elucidated the essential band gap relation between the SnOxand NiGa2O4in the heterostructure, and a deep understanding of the charge separation mechanism based on the band alignment in such system was provided. Our study demonstrates great potential of the SnOx–NiGa2O4composites to be an attractive photocatalysts for the overall water splitting or pollution degradation under visible light irradiation.