探討不同熱處理氣氛對靜電紡絲製備TiO2-C纖維之光學性質影響

本實驗主要探討的方向為添加葡萄糖至前軀體溶液內，利用靜電紡絲技術製備出奈米纖維，改變其添加的濃度並經過不同氣氛(氮、氦、氬)在500oC熱的處理來獲得TiO2-C奈米纖維。主要目的是希望可以藉由添加葡萄糖增加TiO2奈米纖維的碳含量，並更進一步的改變TiO2奈米纖維的吸收光特性(往紅位移)。以AFM、FE-SEM及UV-Vis進行特性分析。以AFM測量TiO2-C纖維的表面形貌及其3D圖，探討不同的製程對表面型態的影響，發現添加葡萄糖可以改變熱處理後的纖維表面形貌，使表面較為平坦；FE-SEM觀察TiO2-C奈米纖維的纖維直徑分佈的不同，發現添加葡萄糖的濃度會改變纖維直徑，且隨著濃度的增加而增加(30~50nm)；最後以UV-Vis進行光吸收特性的分析，添加葡萄糖可以改變UV-Vis的吸收波長往紅位移方向移動(約20nm)，並且將數據比較後可以獲得，改質的葡萄糖濃度3wt%最佳，濃度高於3wt%會使光吸收特性往藍位移(長波長)移動。由本論文探討添加葡萄糖及改變不同熱處理氣氛對TiO2-C的光學性質影響，並且建立相關的分析技巧。

關鍵字

靜電紡絲； TiO2-C奈米纖維；熱處理氣氛

並列摘要

In this study, was add the glucose into the precursor solution by electrospinning to produce the nanofibers, varying the concentration and through the different heat treatment atmosphere in 500oC that we can obtain the TiO2-C nanofibers , further modified the optical characteristic(red shift). Use AFM, FE-SEM and UV-Vis to measure there properties. AFM to measure the surface and 3D graphics of TiO2-C, and investigate the affect of difference process for nanofibers, the result of AFM we can observed the affect of add the glucose changes in morphology from coarse to smooth. For FE-SEM can obtain the fibers diameter increases(30~50nm) with the concentration. Optical properties for UV-Vis of absorption characteristics, the result was illustrated the best concentration of modified was 3wt%(red shift ~20nm), the concentration higher than 3wt%, the optical characteristics will be worse(blue shift). With this experiment, varying the concentration of glucose and through the different heat treatment atmosphere in 500oC can disscu the influences of optical characteristics.

並列關鍵字

electrospinning ； TiO2-Carbon nanofibers ； heat treatment atmosphere

參考文獻

[01]. Y. Xia, P. Yang, Y. Sun, Y. Wu, B. Mayers, B. Gates, Y. Yin, F. Kim and H. Yan, “One-Dimensional Nanostructures: Synthesis, Characterization, and Applications”, Adv. Mater.,vol.15, 2003, p.353.

[02]. D. H. Reneker and I. Chun, “Nanometrediameterfibres of polymer, produced by electrospinning”, Nanotechnology, vol.7, 1996, p.216.

[03]. A. Frenot and I. S. Chronakis, “Polymer nanofibers assembled by electrospinning”, Curr.Opin. Colloid Interface Sci., vol.8, 2003, p.64.

[04]. Z. M. Huang, Y. Z. Zhang, M. Kotaki and S. Ramakrishna, “A review on polymernanofibers by electrospinning and their applications in nanocomposites”, Compos. Sci. Technol., vol.63, 2003, p.2223.

[06]. Peng Zhang, Changlu Shao, Zhenyi Zhang, Mingyi Zhang, Jingbo Mu, Zengcai Guo and Yichun Liu, “TiO2@carbon core/shell nanofibers: Controllable preparation and enhanced visible photocatalytic properties”, Nanoscale, vol.3, 2011, pp.2943-2949.

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探討不同熱處理氣氛對靜電紡絲製備TiO2-C纖維之光學性質影響

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