TY - JOUR
T1 - Structural characterization and morphology of electrospun TiO2 nanofibers
AU - Nuansing, Wiwat
AU - Ninmuang, Siayasunee
AU - Jarernboon, Wirat
AU - Maensiri, Santi
AU - Seraphin, Supapan
N1 - Funding Information:
The authors would like to thank the Science and Technology Service Center, Chiang Mai University for providing TEM facilities, and the Department of Electrical Engineering, Chulalongkorn University for providing AFM facilities. We also express our thanks to Dr. Anusorn Niyompan for assistance with the XRD measurements. This work is supported by the Research Division, Khon Kaen University and the Postgraduate Education Development (PED) in Physics Program, The Commission on Higher Education, The Ministry of Education, Thailand.
PY - 2006/7/15
Y1 - 2006/7/15
N2 - This paper reports on structural characterization and morphology of titanium dioxide (TiO2) nanofibers prepared by electrospinning using a solution that contained poly(vinyl pyrrolidone) (PVP) and titanium(diisoproproxide) bis(2,4-pentanedionate) 75 wt.% in 2-propanol. TiO2 nanofibers with diameters of 80-100 nm were successfully obtained from calcination of the as-spun TiO2/PVP composite nanofibers at above 300 °C in air for 3 h. The as-spun and calcined TiO2/PVP composite nanofibers were characterized by TG-DTA, Raman spectroscopy, XRD, SEM, AFM, and TEM. The results indicated a significant effect of calcination temperature on the crystalline phase in the form of either anatase or mixed anatase-rutile and the morphology of the nanofibers. The anatase-to-rutile transformation and the grain growth during the calcination of the electrospun TiO2/PVP composite nanofibers, as revealed by TEM, occurred simultaneously and affected each other. The rutile content was the highest (∼80%) at 800 °C, and it can be expected that the complete anatase-to-rutile transformation in the TiO2 nanofibers would be above 800 °C.
AB - This paper reports on structural characterization and morphology of titanium dioxide (TiO2) nanofibers prepared by electrospinning using a solution that contained poly(vinyl pyrrolidone) (PVP) and titanium(diisoproproxide) bis(2,4-pentanedionate) 75 wt.% in 2-propanol. TiO2 nanofibers with diameters of 80-100 nm were successfully obtained from calcination of the as-spun TiO2/PVP composite nanofibers at above 300 °C in air for 3 h. The as-spun and calcined TiO2/PVP composite nanofibers were characterized by TG-DTA, Raman spectroscopy, XRD, SEM, AFM, and TEM. The results indicated a significant effect of calcination temperature on the crystalline phase in the form of either anatase or mixed anatase-rutile and the morphology of the nanofibers. The anatase-to-rutile transformation and the grain growth during the calcination of the electrospun TiO2/PVP composite nanofibers, as revealed by TEM, occurred simultaneously and affected each other. The rutile content was the highest (∼80%) at 800 °C, and it can be expected that the complete anatase-to-rutile transformation in the TiO2 nanofibers would be above 800 °C.
KW - Electron microscopy
KW - Electrospinning
KW - Nanofibers
KW - Raman spectroscopy
KW - Titanium dioxide
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U2 - 10.1016/j.mseb.2006.04.030
DO - 10.1016/j.mseb.2006.04.030
M3 - Article
AN - SCOPUS:33745659429
SN - 0921-5107
VL - 131
SP - 147
EP - 155
JO - Materials Science and Engineering: B
JF - Materials Science and Engineering: B
IS - 1-3
ER -