Abstract
Bi2WO6 hierarchical structures have been synthesized by a halide ions-assisted hydrothermal method using Bi(NO3)3·5H2O and Na2WO4·2H2O as the raw materials without any template or surfactant. It is interesting to note that the halide ions (F‒, Cl‒ and Br‒) play a key role on the microstructure of Bi2WO6, especially the morphology and surface activity. At the presence of F‒ in the precursor, the prepared Bi2WO6 exhibits a sheet-like morphology with flat surface, and the sheets further intersect with each other to form a three-dimensional structure. However, when Cl‒ or Br‒ exist in the precursor, the obtained Bi2WO6 with chloride or bromide ions adsorbed on the surface shows a flower-like porous structure constructed by nanosheets, and each nanosheet is assembled by loosely contacted ultrathin nanoplates. The Bi2WO6 structures prepared with the assistance of Cl‒ or Br‒ behave selectively enhanced adsorption and photodegradation for organic dyes mainly attributed to the active surface and special morphology.
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The authors thank Research Center of Analysis and Test of East China University of Science and Technology for the help on sample analysis.
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Liang, Y., Shi, J. Effect of Halide Ions on the Microstructure of Bi2WO6 with Enhanced Removal of Rhodamine B. J Inorg Organomet Polym 30, 2872–2880 (2020). https://doi.org/10.1007/s10904-019-01437-0
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DOI: https://doi.org/10.1007/s10904-019-01437-0