Template-induced synthesis of hierarchical SiO(2)@gamma-AlOOH spheres and their application in Cr(VI) removal.
Hierarchical structured SiO(2)@gamma-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 gamma-AlOOH lamellas. The growth mechanism was proposed as silica template-induced heterogeneous deposition of gamma-AlOOH lamellas. The adsorption properties of hierarchical SiO(2)@gamma-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 degrees C showed good adsorption capability of Cr(VI) ions.
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.
Yongqiang
Y
Wang
Guozhong
G
Wang
Hongqiang
H
Wang
Weiping
W
Cai
Changhao
C
Liang
Lide
L
Zhang
D000327:Adsorption; D002857:Chromium / Q000378:metabolism*; D053758:Nanoparticles; D012822:Silicon Dioxide / Q000378:metabolism*; D014873:Water Pollutants / Q000378:metabolism*; D018508:Water Purification / Q000379:methods*
D014873:Water Pollutants; D002857:Chromium; C074702:chromium hexavalent ion; D012822:Silicon Dioxide