title: Crystal Structure and Photocatalytic Activity of Al-Doped TiO2 Nanofibers for Methylene Blue Dye Degradation.
abstract: Al-TiO2 nanofibers were prepared using a sol-gel derived electrospinning by varying the Al/Ti molar ratio from 0 to 0.73 to investigate the effect of Al doping on the crystal structure and the photocatalytic activity of Al-TiO2 for methylene blue (MB) degradation. XRD results indicated that as the Al/Ti molar ratio rose, crystal structure of Al-TiO2 was changed from anatase/rutile (undoped), anatase (0.07-0.18), to amorphous phase (0.38-0.73), which was confirmed by XPS and Raman analysis. The degradation kinetic constant increased from 7.3 x 10(-4) min(-1) to 4.5 x 10(-3) min(-1) with the increase of Al/Ti molar ratios from 0 to 0.38, but decreased to 3.4 x 10(-3) min(-1) when the Al/Ti molar ratio reached 0.73. The Al-TiO2 catalyst doped with 0.38 Al/Ti molar ratio demonstrated the best MB degradation. Experimental results indicated that the Al doping in Al-TiO2 was mainly attributed to the crystal structure of TiO2 and the photocatalytic degradation of MB.
authors.forename: Deuk Yong
authors.initials: DY
authors.lastname: Lee
authors.forename: Myung-Hyun
authors.initials: MH
authors.lastname: Lee
authors.forename: Bae-Yeon
authors.initials: BY
authors.lastname: Kim
authors.forename: Nam-Ihn
authors.initials: NI
authors.lastname: Cho
mesh_terms: D002384:Catalysis / Q000528:radiation effects; D008027:Light; D008422:Materials Testing; D008751:Methylene Blue / Q000737:chemistry* / Q000302:isolation & purification / Q000528:radiation effects; D008968:Molecular Conformation / Q000528:radiation effects; D057139:Nanofibers / Q000737:chemistry* / Q000528:radiation effects / Q000648:ultrastructure; D010316:Particle Size; D010777:Photochemistry / Q000379:methods; D014025:Titanium / Q000737:chemistry* / Q000528:radiation effects; D014874:Water Pollutants, Chemical / Q000737:chemistry* / Q000302:isolation & purification / Q000528:radiation effects; D018508:Water Purification / Q000379:methods*
chemical_list: D014874:Water Pollutants, Chemical; C009495:titanium dioxide; D014025:Titanium; D008751:Methylene Blue