Lee Deuk Yong, Kim Jin-Tae, Song Yo-Seung, Kim Bae-Yeon
J Nanosci Nanotechnol. 2015 Jan;15(1):566-9. doi: 10.1166/jnn.2015.8325.
Platinum (Pt) doped TiO2 nanofibers were prepared by a sol-gel derived electrospinning and subsequent calcination for 3 h at temperatures from 500 degrees C to 700 degrees C in air. The influence of calcination temperature on crystal structure of the Pt-TiO2 nanofibers was investigated by using an X-ray diffractometer (XRD) and a transmission electron microscope (TEM). The fibers possessed both anatase and rutile phases of TiO2 as a function of the calcination temperature. At 500 degrees C, only anatase phase was observed. However, the rutile phase started to grow with increasing the temperature. At 700 degrees C, 47% of rutile phase with a crystallite size of 31 nm was detected. The continuous and smooth Pt-TiO2 fibers with a diameter of 38 nm were changed to the particulate morphology (at 700 degrees C) with increasing the temperature. This result is particularly important because the calcination temperature is attributed to the fiber morphology and the crystal structure.
通过溶胶-凝胶衍生的静电纺丝法制备了铂（Pt）掺杂的二氧化钛纳米纤维，并随后在空气中于500℃至700℃的温度下煅烧3小时。使用X射线衍射仪（XRD）和透射电子显微镜（TEM）研究了煅烧温度对Pt-TiO₂纳米纤维晶体结构的影响。随着煅烧温度的变化，纤维呈现出二氧化钛的锐钛矿相和金红石相。在500℃时，仅观察到锐钛矿相。然而，随着温度升高，金红石相开始生长。在700℃时，检测到47%的金红石相，其微晶尺寸为31nm。随着温度升高，直径为38nm的连续且光滑的Pt-TiO₂纤维在700℃时转变为颗粒形态。这一结果尤为重要，因为煅烧温度决定了纤维形态和晶体结构。
