Characterization and application of electrospun alumina nanofibers
1 Department of Chemical and Biochemical Engineering, Chosun University, Gwangju 501-759, South Korea
2 Department of Environmental and Chemical Engineering, Seonam University, Namwon 590-711, South Korea
3 Department of Life Science and Biotechnology, Shingyeong University, Hwaseong 445-741, South Korea
4 Department of Environmental Engineering, Chonnam National University, Gwangju 500-757, South Korea
5 Research Institute of Advanced Engineering Technology, Chosun University, Gwangju 501-759, South Korea
Nanoscale Research Letters 2014, 9:44 doi:10.1186/1556-276X-9-44Published: 27 January 2014
Alumina nanofibers were prepared by a technique that combined the sol–gel and electrospinning methods. The solution to be electrospun was prepared by mixing aluminum isopropoxide (AIP) in ethanol, which was then refluxed in the presence of an acid catalyst and polyvinylpyrolidone (PVP) in ethanol. The characterization results showed that alumina nanofibers with diameters in the range of 102 to 378 nm were successfully prepared. On the basis of the results of the XRD and FT-IR, the alumina nanofibers calcined at 1,100°C were identified as comprising the α-alumina phase, and a series of phase transitions such as boehmite → γ-alumina → α-alumina were observed from 500°C to 1,200°C. The pore size of the obtained γ-alumina nanofibers is approximately 8 nm, and it means that they are mesoporous materials. The kinetic study demonstrated that MO adsorption on alumina nanofibers can be seen that the pseudo-second-order kinetic model fits better than the pseudo-first-order kinetic model.