Band-gap engineering of porous BiVO4 nanoshuttles by Fe and Mo co-doping for efficient photocatalytic water oxidation
Band-gap engineering of porous BiVO4 nanoshuttles by Fe and Mo co-doping for efficient photocatalytic water oxidation
复制标题
Fe和Mo共掺杂多孔BiVO4纳米梭的带隙工程用于高效光催化水氧化
DOI：
10.1039/c7qi00588a
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发表时间：
2017-12-01
影响因子：
7
通讯作者：
Hu, Yong
中科院分区：
文献类型：
--
作者：
Liu, Ren;Ren, Jiabin;Hu, Yong
由于其预期的协同效应，在半导体光催化剂中共掺杂金属离子是一种很有前景的促进光催化活性的策略。在这项研究中，我们通过简单的溶剂热方法结合随后的浸渍热处理，首次展示了均匀的 Fe 和 Mo 共掺杂 BiVO4 (Fe/Mo-BVO) 多孔纳米梭 (PNS) 的合成。研究发现，Fe和Mo掺入BVO晶格不仅影响梭状形貌和多孔结构，而且改变了原始BVO的能带结构；这从而提高了 BVO 的光催化性能。所制备的Fe/Mo-BVO PNSs在可见光照射下表现出显着增强的水氧化光活性，平均O-2释放速率高达191.5 mu mol h(-1) g(-1)，分别比Mo掺杂BVO和原始BVO获得的速率高近1.5和17倍。还采用密度泛函理论（DFT）计算来进一步研究共掺杂产物的电子结构。
Co-doping of metal ions in semiconductor photocatalysts is a promising strategy to promote photocatalytic activity due to its expected synergistic effects. In this study, we demonstrated the first synthesis of uniform Fe and Mo co-doped BiVO4 (Fe/Mo-BVO) porous nanoshuttles (PNSs) through a simple solvothermal method combined with a subsequent impregnation thermal treatment. It has been discovered that the incorporation of Fe and Mo into the BVO lattice not only influences the shuttle-like morphology and porous structure but also modifies the band structure of the pristine BVO; this consequently boosts the photocatalytic performance of BVO. The as-prepared Fe/Mo-BVO PNSs exhibit significantly enhanced photoactivity for water oxidation under visible-light irradiation, and an average O-2 evolution rate of up to 191.5 mu mol h(-1) g(-1) is obtained, which is nearly 1.5 and 17 times higher than the rates obtained for Mo-doped BVO and pristine BVO, respectively. Density functional theory (DFT) calculations were also employed to further investigate the electronic structure of the co-doped products.