Modulation of Photocatalytic Properties by Strain in 2D BiOBr Nanosheets

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• 作者：Haifeng Feng ; Zhongfei Xu ; Liang Wang ; Youxing Yu ; David Mitchell ; Dandan Cui ; Xun Xu ; Ji Shi ; Takumi Sannomiya ; Yi Du ; Weichang Hao ; Shi Xue Dou
• 刊名：ACS Applied Materials & Interfaces
• 出版年：2015
• 出版时间：December 23, 2015
• 年：2015
• 卷：7
• 期：50
• 页码：27592-27596
• 全文大小：483K
• ISSN：1944-8252

文摘

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 in 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.