Journal
CRYSTENGCOMM
Volume 15, Issue 20, Pages 4124-4130Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c3ce40237a
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Funding
- 973 Program [2012CB934100]
- National Natural Science Foundation of China [21101043]
- Research Fund for Doctoral Program of Higher Education of China [20112302120018]
- Natural Science Foundation of Heilongjiang Province of China [QC2010032]
- Fundamental Research funds for the Central Universities [HIT.KLOF.2010009]
- China Postdoctoral Science Foundation [20100471046]
- Special Research funds for the Scientific and Technical Innovative Talents of Harbin City [2012RFQXG108]
- Natural Scientific Research Innovation Foundation in Harbin Institute of Technology [HIT.NSRIF.2009026]
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One-dimensional hierarchical Bi2WO6 hollow tubes with porous walls have been solvothermally synthesized using Bi2O3 rods as both template and reactant, and characterized by FESEM, TEM and XRD. Experimental results indicate that the walls of these micro-tubes are made of Bi2WO6 nanoplates stacking in a disordered state, which creates an interesting macro-mesoporous structure. Influencing factors on the resulting products including the adding order of reactants, ethanol content, and pH value are systematically investigated. A possible mechanism based on the Kirkendall effect is proposed. What is more, in comparison with commercial TiO2 powders (P25) the hierarchical Bi2WO6 hollow tube structure exhibits a superior shape-associated photocatalytic activity in degrading RhB under simulated sunlight irradiation. The high photocatalytic performance can be attributed to the novel hierarchical structure, which enables good permeability, large BET surface areas, and proper energy band. Moreover, the employed sacrificial template method can be extended to the synthesis of other Bi-based photocatalysts successfully.
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