Facile fabrication of flower-shaped Bi₂WO₆ superstructures and visible-light-driven photocatalytic performance

详细信息	查看全文 | 推荐本文 |

• 作者：Guo-Ying Zhang ; ^{gyzhangtj@yahoo.cn} ; Yan Feng ; Qing-Song Wu ; Yan-Yan Xu ; Dong-Zhao Gao
• 关键词：A. Oxides ; A. Microporous materials ; B. Chemical synthesis ; C. Electron microscope ; D. Catalytic properties
• 刊名：Materials Research Bulletin
• 出版年：2012
• 期刊代码：60_00255408
• 类别：ms
• 出版时间：August, 2012
• 卷：47
• 期：8
• 页码：1919-1924
• 文件大小：929 K

摘要

Flower-shaped porous Bi₂WO₆ superstructures assembled from squared nanoplates have been successfully fabricated by a facile hydrothermal method without any surfactants or additives. Parameter-dependent experiments show that the initial strong acidic condition of the hydrothermal precursor is essential for the construction of tiny nanoplates into hierarchical Bi₂WO₆ flowers. The sample exhibits improved visible-light-driven photocatalytic activity in the degradation of Rhodamine-B, compared with Bi₂WO₆ multilayered disks, isolated platelets prepared at elevated pH values and bulk Bi₂WO₆ obtained by solid state method, respectively. It is believed that the higher BET surface area and nano/mesopore structure can afford more reactive sites and abundant transport paths for the degradation reaction. Moreover, the sample shows excellent circulation stability, suggesting its potential application in dealing with enviromental pollutions.