Journal
CRYSTENGCOMM
Volume 13, Issue 24, Pages 7267-7275Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c1ce05671a
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Funding
- National Natural Science Foundation of China [21073084, 20773065]
- Natural Science Foundation of Jiangsu Province [BK2011438]
- National Basic Research (973) Program of China [2007CB936302]
- Modern Analysis Center of Nanjing University
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Bi2WO6 with multilayered disc-like and 3D hierarchical nest-like architectures self-assembled from 2D nanosheets were successfully synthesized by a hydrothermal method in EDTA-mediated processes. It was found that the morphology modulation of the as-obtained products could be easily realized simply by changing the amount of EDTA introduced into the reaction system. The stepwise self-assembly formation mechanisms for two different hierarchical architectures were proposed on the basis of a series of time-dependent experiments. The photocatalytic activities of the different Bi2WO6 samples for the degradation of Rhodamine B (RhB) were also evaluated. Due to the unique morphology, porous structure and large surface area, Bi2WO6 nest-like architectures exhibited better activity performance than Bi2WO6 multilayered microdiscs. The present work not only presents an efficient way for the selectively controllable preparation of Bi2WO6 hierarchical structures via self-assembly from 2D nanosheets, but also provides a step forward in the design of photocatalysts with controllable morphology and enhanced photocatalytic activities.
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