Modulation of Photocatalytic Properties by Strain in 2D BiOBr Nanosheets
Modulation of Photocatalytic Properties by Strain in 2D BiOBr Nanosheets
复制标题
2DBiOBr 纳米片中应变的光催化性能调节
DOI：
10.1021/acsami.5b08904
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发表时间：
2015-12-23
影响因子：
9.5
通讯作者：
Dou, Shi Xue
中科院分区：
文献类型：
--
作者：
Feng, Haifeng;Xu, Zhongfei;Dou, Shi Xue
采用水热法选择性合成了具有高活性{001}晶面的BiOBr纳米片。BiOBr纳米片中的内部应变已通过pH值连续调谐。BiOBr在染料降解中的光催化性能可以通过应变效应来控制。低应变BiOBr纳米片显示出改善的光催化活性。密度泛函计算表明，应变可以修改能带结构和对称性BiOBr。在低应变BiOBr纳米片的增强的光催化活性是由于改进的电荷分离归因于具有间接带隙的高度分散的能带结构。
BiOBr nanosheets with highly reactive {001} facets exposed were selectively synthesized by a facile hydrothermal method. The inner strain in the BiOBr nanosheets has been tuned continuously by the pH value. The photocatalytic performance of BiOBr in dye degradation can be manipulated by the strain effect. The low-strain BiOBr nanosheets show improved photocatalytic activity. Density functional calculations suggest that strain can modify the band structure and symmetry BiOBr. The enhanced photocatalytic activity in low-strain BiOBr nanosheets is due to improved charge separation attributable to a highly dispersive band structure with an indirect band gap.