One-step hydrothermal synthesis of hierarchical Ag/Bi2WO6 composites: In situ growth monitoring and photocatalytic activity studies
Hierarchical Ag/Bi2WO6 nanomaterials were prepared by a facile one-step hydrothermal method in mixed acetic acid and ethylene glycol (EG) medium. EG is employed as mild reducing agent for the formation of metallic Ag from Ag+ precursors. In situ energy dispersive X-ray diffraction (EDXRD) monitoring showed that the hydrothermal formation kinetics of Bi2WO6 in the presence of EG was significantly slowed down due to its very high viscosity. The photocatalytic activities of Ag/Bi2WO6 composites were evaluated by the photodegradation of methylene blue (MB) under visible light irradiation. The photocatalytic activity of Bi2WO6 is strongly influenced by the Ag loading. The enhanced catalytic activity of the composites is based on the cooperative effects of plasmon absorption band and separation of photogenerated electron-hole pairs.
KeywordsAg/Bi2WO6 composites in situ EDXRD photocatalysis
Unable to display preview. Download preview PDF.
- 2 (a).
- 2 (b).
- 2 (c).
- 5 (a).
- 5 (b).
- 7.Zhou Y, Tian ZP, Zhao ZY, Liu Q, Kou JH, Chen XY, Gao J, Yan SC, Zou ZG. High-yield synthesis of ultrathin and uniform Bi2WO6 square nanoplates benefitting from photocatalytic reduction of CO2 into renewable hydrocarbon fuel under visible light. ACS App Mater Inter, 2011, 3: 3594–3601CrossRefGoogle Scholar
- 20 (a).Dong F, Zheng A, Sun YJ, Fu M, Jiang BQ, Ho WK, Lee SC, Wu ZB. One-pot template-free synthesis, growth mechanism and enhanced photocatalytic activity of monodisperse (BiO)2CO3 hierarchical hollow microspheres self-assembled with single-crystalline nanosheets. CrystEngComm, 2012, 14: 3534–3544CrossRefGoogle Scholar
- 20 (b).
- 26 (a).
- 26 (b).
- 26 (c).
- 29 (a).
- 29 (b).
- 31 (a).
- 31 (b).
- 32.Zhou Y, Antonova E, Lin YH, Grunwaldt JD, Bensch W, Patzke GR. In situ X-ray absorption spectroscopy/energy-dispersive X-ray diffraction studies on the hydrothermal formation of Bi2W1-xMoxO6 nanomaterials. Eur J Inorg Chem, 2012, 783–789Google Scholar