Fe(III) modified BiOCl ultrathin nanosheet towards high-efficient visible-light photocatalyst
Fe(III) modified BiOCl ultrathin nanosheet towards high-efficient visible-light photocatalyst
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DOI：
10.1016/j.nanoen.2016.10.001
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发表时间：
2016-12-01
期刊：
影响因子：
17.6
通讯作者：
Lei, Yong
中科院分区：
文献类型：
--
作者：
Mi, Yan;Wen, Liaoyong;Lei, Yong
为了在可见光区获得较高的光催化活性，本文首次采用溶剂热法合成了Fe（III）修饰的BiOCl超薄纳米片（Fe(III)@BOC NS）。形貌和组成表征表明，在活性[001]面暴露下，制备的Fe(III)@BOC NS的厚度小于5个原子层。Fe（III）掺杂和表面接枝导致BiOCl导带最小下移0.58 eV，使光吸收从紫外光区扩展到可见光区，并促进了可见光照射下的界面电荷转移。同时，Fe（III）改性在超薄纳米片表面引入了独特的活性位点，促进了表面反应。此外，适当的[001]面自感电场和超薄纳米片载流子扩散长度的缩短都提高了载流子的分离和转移效率。因此，利用这些优势，我们通过实验证明了Fe(III)@BOC NS是一种高效的可见光催化剂，用于环境修复和水分解。
To pursue high photocatalytic activity in visible-light region, the Fe(III) modified BiOCl ultrathin nanosheet (Fe(III)@BOC NS) has been firstly synthesized via a facile solvothermal approach. The morphological and compositional characterizations reveal that the thickness of the as-prepared Fe(III)@BOC NS is less than 5 atomic layer with the exposure of active [001] facets. And the Fe(III) doping and surface grafting result in a 0.58 eV down-shift of the BiOCl conduction band minimum extending the light absorption from ultraviolet light to visible light region, as well as a promoted interfacial charge transfer upon visible light irradiation. Meanwhile, the Fe(III) modification introduces unique active sites on the surface of ultrathin nanosheet facilitating the surface reaction. Moreover, both of the appropriate self-induced electric field of [001] facets, and the shortened charge carrier diffusion length of ultrathin nanosheet enhance the separation and transfer efficiency of charge carriers. Therefore, by taking those advantages, we experimentally demonstrate that the Fe(III)@BOC NS is a high-efficiency visible-light photocatalyst for both of environment remediation and water splitting.