Template-induced synthesis of hierarchical SiO<sub>2</sub>@γ-AlOOH spheres and their application in Cr(VI) removal
Wang, Yongqiang; Wang, Guozhong; Wang, Hongqiang; Cai, Weiping; Liang, Changhao; Zhang, Lide; Wang, Guozhong;; Wang, Yongqiang; Key Laboratory of Materials Physics, Anhui Key Laboratory of Nanomaterials and Nanotechnology, Institute of Solid State Physics, Chinese Academy of Sciences, PO Box 1129, Hefei 230031, People’s Republic of China; Wang, Hongqiang; Key Laboratory of Materials Physics, Anhui Key Laboratory of Nanomaterials and Nanotechnology, Institute of Solid State Physics, Chinese Academy of Sciences, PO Box 1129, Hefei 230031, People’s Republic of China; Cai, Weiping; Key Laboratory of Materials Physics, Anhui Key Laboratory of Nanomaterials and Nanotechnology, Institute of Solid State Physics, Chinese Academy of Sciences, PO Box 1129, Hefei 230031, People’s Republic of China; Liang, Changhao; Key Laboratory of Materials Physics, Anhui Key Laboratory of Nanomaterials and Nanotechnology, Institute of Solid State Physics, Chinese Academy of Sciences, PO Box 1129, Hefei 230031, People’s Republic of China; Zhang, Lide; Key Laboratory of Materials Physics, Anhui Key Laboratory of Nanomaterials and Nanotechnology, Institute of Solid State Physics, Chinese Academy of Sciences, PO Box 1129, Hefei 230031, People’s Republic of China
Журнал:
Nanotechnology
Дата:
2009-04-15
Аннотация:
Hierarchical structured SiO<sub>2</sub>@γ-AlOOH spheres were fabricated in one step by using silica colloidal spheres as a template. Scanning electron microscopy and transmission electron microscopy investigation showed that the shell is composed of large amounts of nanoscale γ-AlOOH lamellas. The growth mechanism was proposed as silica template-induced heterogeneous deposition of γ-AlOOH lamellas. The adsorption properties of hierarchical SiO<sub>2</sub>@γ-AlOOH spheres annealed at different temperatures were investigated through the removal test of Cr(VI) ions in model wastewater, and the nanostructures annealed at 400 °C showed good adsorption capability of Cr(VI) ions.
907.0Кб