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Using Ti powder as reagent,ultra-long TiO2 nanofibers were prepared via hydrothermal method in NaOH solution.The samples were char-acterized respectively by means of field emission scanning electron microscopy (FESEM),transmission electron microscopy (TEM) with selected area electron diffraction (SAED),and X-ray diffraction (XRD).The diameter and the length of the ultra-long TiO2 nanofiber were ～100 nm and >200μm,respectively.The ultra-long TiO2 nanofibers were anatase after heat treatment at 450 ?C for 1 h.Moreover,the optical properties of the products were investigated by UV-visible light absorption spectrum.Furthermore,methyl orange was used as a target molecule to estimate the photocatalytic activity of the specimens.Under the same testing conditions,the photocatalytic activity of the ultra-long TiO2 nanofibers was higher than that of P25.Direct electrical pathway and improved light-harvesting efficiency were crucial for the superior photocatalytic activity of the ultra-long TiO2 nanofibers.
Using Ti powder as reagent, ultra-long TiO2 nanofibers were prepared via hydrothermal method in NaOH solution. The samples were char-acterized respectively by means of field emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM) with selected area electron diffraction (SAED), and X-ray diffraction (XRD). The diameter and the length of the ultra-long TiO2 nanofiber were ~ 100 nm and> 200 μm respectively.The ultra-long TiO2 nanofibers were anatase after heat treatment at 450 ° C for 1 h. Moreover, the optical properties of the products were investigated by UV-visible light absorption spectrum. Future edited, methyl orange was used as a target molecule to estimate the photocatalytic activity of the specimens. Unit the same testing conditions, the photocatalytic activity of the ultra-long TiO2 nanofibers was higher than that of P25. Direct electrical pathway and improved light-harvesting efficiency were crucial for the superior photocatalytic activity of the ultra-long Ti O2 nanofibers.