The {001} facets-dependent superior photocatalytic activities of BiOCl nanosheets under visible light irradiation
The {001} facets-dependent superior photocatalytic activities of BiOCl nanosheets under visible light irradiation
复制标题
BiOCl纳米片在可见光照射下的{0 0 1}面依赖性优异光催化活性
DOI：
10.1016/j.apsusc.2015.05.100
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发表时间：
2015-09-15
影响因子：
6.7
通讯作者：
Zhang, Jun
中科院分区：
文献类型：
--
作者：
Li, Yingjun;Wang, Qin;Zhang, Jun
采用水热法选择性地合成了BiOCl纳米片，其片层厚度可调，{0 0 1}晶面主要暴露在外.通过改变合成参数，如P123和甘露醇的量、反应时间、表面活性剂的种类、BiOCl纳米片的尺寸、厚度、形貌和{0 0 1}面的百分比，可以很好地控制BiOCl纳米片。暴露的{0 0 1}晶面具有高表面能和高氧原子密度，不仅有利于罗丹明B（RhB）染料的吸附，而且可以积累光生电子，这些电子可以被O-2捕获并转化为活性氧O-2（-中心点）。因此，在可见光照射下，具有{0 0 1}晶面的BiOCl纳米片对染料光敏降解具有上级催化活性.令人印象深刻的是，P123和甘露醇制备的BiOCl纳米片表现出上级催化活性，RhB在20 min内被完全降解。我们目前的工作有望提供一个新的洞察光催化理论，更好地理解可见光催化反应和高活性光催化剂的合理设计。(C)2015 Elsevier B. V.版权所有。
BiOCl nanosheets with tunable lamella thickness and dominantly exposed {0 0 1} facets were selectively synthesized via a facile hydrothermal method. By modifying the synthetic parameters, such as the amount of P123 and mannitol, the reaction time, types of surfactants, the size, thickness, morphologies, and percentage of {0 0 1} facets over BiOCl nanosheets were well controlled. The exposed {0 0 1} facets with high surface energy and high density of oxygen atoms are not only conducive to the adsorption of the rhodamine B (RhB) dye but also can accumulate the photo-generated electrons, which can be captured by O-2 and converted into reactive oxygen species O-2(-center dot). Therefore, the resultant ultrathin BiOCl nanosheets with exposed {0 0 1} facets exhibit superior catalytic activity for dye photosensitization degradation under visible light irradiation. Impressively, the ultrathin BiOCl nanosheets prepared with P123 and mannitol manifest superior catalytic activity and RhB was completely degraded within 20 min. Our current work is expected to offer a new insight into photocatalytic theory for better understanding of visible light photocatalytic reactions and rational design of highly active photocatalysts. (C) 2015 Elsevier B.V. All rights reserved.