Wavelength-dependent differences in photocatalytic performance between BiOBr nanosheets with dominant exposed (001) and (010) facets
Wavelength-dependent differences in photocatalytic performance between BiOBr nanosheets with dominant exposed (001) and (010) facets
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DOI：
10.1016/j.apcatb.2016.01.053
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发表时间：
2016-06-15
影响因子：
22.1
通讯作者：
Hou, Wanguo
中科院分区：
文献类型：
--
作者：
Li, Haiping;Hu, Tingxia;Hou, Wanguo
在波长（λ）为365和>= 420 nm的光照射下，优势暴露（0 ~ 10）面的BiOBr纳米片比高度暴露（0 ~ 01）面的BiOBr纳米片表现出更高的光催化活性，但在λ = 254nm的光照射下，其光催化活性较低。λ依赖性的光催化活性差异是由于两个样品之间不同的（0 0 1）面暴露百分比（F(0 0 1)）和纳米片厚度(H)造成的。影响BiOBr纳米片光活性的主要因素是F（0.01）的差异还是H的差异，这取决于入射光穿透深度，入射光穿透深度随λ增加而增加。本研究为深入了解二维光催化剂的结构-性能关系提供了新的思路，为二维半导体的光催化研究提供了重要的方向。(C 2016 Elsevier B.V.版权所有
BiOBr nanosheets with dominant exposed (0 1 0) facets exhibit higher photocatalytic activity than those with highly exposed (0 01) facets under illumination of light with wavelengths (lambda) of similar to 365 and >= 420 nm, but lower photoactivity under light with lambda of 254nm. The lambda-dependent differences in photocatalytic activity result from different (0 0 1) facet exposure percentages (F(0 0 1)) and nanosheet thicknesses (H) between the two samples. Whether the difference in F(0 01) or that in H influences the photoactivity of the BiOBr nanosheets as a primary factor depends on incident light penetration depth which increases with the lambda. This study gives a better insight into the structure-performance relationship of two-dimensional (2D) photocatalysts and will supply important direction for photocatalytic studies of 2D semiconductors. (C 2016 Elsevier B.V. All rights reserved.