In the electrolyte of oxalic acid/alcohol/aqueous solution, highly-ordered porous anodic aluminum oxide(AAO) template was fabricated by hard anodization. The surface morphology and the structure of AAO template were c...In the electrolyte of oxalic acid/alcohol/aqueous solution, highly-ordered porous anodic aluminum oxide(AAO) template was fabricated by hard anodization. The surface morphology and the structure of AAO template were characterized by Field-Emission Scanning Electron Microscope(FE-SEM) and XRD, respectively. The effects of different factors including alcohol type, ratio of alcohol to water, and oxalic acid concentration on the ordering degree and pore diameter of AAO template were investigated. Under the glycol to water ratio of 1∶1(by volume) with an oxalic acid concentration of 0.5 mol·L-1, and voltage at 160 V, the obtained AAO template was hexangular arrangement with pore diameter of 80 nm and pores spacing of 120 nm, the growth rate was 51.9 μm·h-1.展开更多
The barium titanate nanowires of complex oxide were fabricated in porous anodic aluminum oxide(AAO)using sol-gel process.The morphology,structure and phase composition of AAO and BaTiO3 nanowires were characterized by...The barium titanate nanowires of complex oxide were fabricated in porous anodic aluminum oxide(AAO)using sol-gel process.The morphology,structure and phase composition of AAO and BaTiO3 nanowires were characterized by Scanning electron microscope(SEM),Transmission electron microscope(TEM),X-ray diffraction(XRD),and other means.Through the analysis of degradation for Rhodamine B,its photocatalytic properties could be researched,and compared with barium titanate powder,the results show that the barium titanate nanowires have good photocatalytic activity.展开更多
Co nanowire arrays of different crystal struc-tures have been electrodeposited into self-assembled anodic aluminum oxide (AAO) templates by varying pH value of electrolyte. The XRD results show that crystal structure ...Co nanowire arrays of different crystal struc-tures have been electrodeposited into self-assembled anodic aluminum oxide (AAO) templates by varying pH value of electrolyte. The XRD results show that crystal structure of Co nanowires is fcc structure at pH = 2.5, a mixed structure of fcc and hcp at pH = 3.0 and 3.5, and hcp structure at pH = 5.0. Magnetic measurements indicate that Co nanowire ar-rays of different crystal structures exhibit different magnetic properties. The coercivity of Co nanowire array of fcc struc-ture is larger than that of hcp structure about 900×103/4p A·m-1 along wire axis, and its squareness is also larger than that of hcp structure.展开更多
文摘In the electrolyte of oxalic acid/alcohol/aqueous solution, highly-ordered porous anodic aluminum oxide(AAO) template was fabricated by hard anodization. The surface morphology and the structure of AAO template were characterized by Field-Emission Scanning Electron Microscope(FE-SEM) and XRD, respectively. The effects of different factors including alcohol type, ratio of alcohol to water, and oxalic acid concentration on the ordering degree and pore diameter of AAO template were investigated. Under the glycol to water ratio of 1∶1(by volume) with an oxalic acid concentration of 0.5 mol·L-1, and voltage at 160 V, the obtained AAO template was hexangular arrangement with pore diameter of 80 nm and pores spacing of 120 nm, the growth rate was 51.9 μm·h-1.
文摘The barium titanate nanowires of complex oxide were fabricated in porous anodic aluminum oxide(AAO)using sol-gel process.The morphology,structure and phase composition of AAO and BaTiO3 nanowires were characterized by Scanning electron microscope(SEM),Transmission electron microscope(TEM),X-ray diffraction(XRD),and other means.Through the analysis of degradation for Rhodamine B,its photocatalytic properties could be researched,and compared with barium titanate powder,the results show that the barium titanate nanowires have good photocatalytic activity.
文摘Co nanowire arrays of different crystal struc-tures have been electrodeposited into self-assembled anodic aluminum oxide (AAO) templates by varying pH value of electrolyte. The XRD results show that crystal structure of Co nanowires is fcc structure at pH = 2.5, a mixed structure of fcc and hcp at pH = 3.0 and 3.5, and hcp structure at pH = 5.0. Magnetic measurements indicate that Co nanowire ar-rays of different crystal structures exhibit different magnetic properties. The coercivity of Co nanowire array of fcc struc-ture is larger than that of hcp structure about 900×103/4p A·m-1 along wire axis, and its squareness is also larger than that of hcp structure.
