本研究是以電紡絲技術來製備二氧化鈦奈米纖維，並將所製備之二氧化鈦奈米纖維不織布做為光觸媒，且應用於染料RBB之降解與去色作用。
第一個部分是電紡絲參數的建立，分別調整有機物/無機物比例、電紡溶液流率及操作電壓來製備纖維，而參數的控制也與纖維直徑有關，本研究成功製備出最佳化直徑僅88 ± 10 nm之二氧化鈦奈米纖維，並從降解的結果證明出隨著纖維尺寸降低，降解效果也隨之提昇。
第二部分為二氧化鈦纖維的摻雜，銀金屬混摻至二氧化鈦奈米纖維中，可以幫助電子與電洞有效的分離，且銀的表面電漿共振效應提高對可見光區域的吸收，因此可以大幅提升光觸媒於紫外光及太陽光下之降解染料RBB效果。銀參雜的量為2.71 wt% 時，染料RBB可以在2小時內降解至1%以下，也較原先不參雜之二氧化鈦之降解效果提升15%以上。但過量的銀摻雜(3.00 wt%)會使二氧化鈦生成金紅石結構，降解效率因此變差，4小時後仍有約38%染料RBB殘餘。
第三部分為奈米碳管的摻雜，因為奈米碳管的良好導電性，可以快速將電子導出而不易與電洞再結合，但奈米碳管會遮蔽二氧化鈦對於光源的吸收，導致光觸媒效果並不如銀參雜理想，當參雜的比例為1 wt%時，僅比原先不參雜之二氧化鈦降解效率多提升6%左右。

Non-wowen mats of titanium dioxide (TiO2) nanofibers were prepared using electrospinning method and their performance for degradation/decoloration of reactive black B dye (RBB) was studied.
First of all, parameters controlling the physical properties of the electrospun nanofibers, like ratio of organic/inorganic component, the flow rate of solution, and the working voltage were established. In this work, TiO2 nanofibers with diameter of about 88 ± 10 nm were successfully prepared and produced enhanced efficiency in dye degradation.
Secondly, TiO2 nanofiber doped with silver (Ag) nanoparticles were prepared and achieved significant improvement in the efficiency of dye degradation. The reason lie upon the ability to separate electrons and holes and the surface plasma resonance effect increase the absorption of visible light for TiO2. While the loading amount of Ag is 2.71 wt%, the concentration of RBB would be under 1% in 2 hours, and the efficiency of the degradation is 15% better than undoped-TiO2. Nevertheless, excessive Ag (3.00 wt%) in the nanofiber would induce formation of rutile structure in TiO2 and hence produce adverse effects in the photocatalytic activity, whereby after 4 hours of degradation, there were still 38% of RBB left.
Thirdly, we incorporated carbon nanotubes (CNTs) into TiO2 prior to electrospinning process in order to prepare the TiO2 non-women mat with embedded CNTs. Due to the excellent conductivity of CNTs, photoelectrons could deliver in a faster rate and prevent the recombination with holes. However, CNTs lying outside of the nanofibers could affect the light absoption of TiO2. While the CNTs amount is 1 wt%, only 6% improvement in degradation, and the efficiency was not comparable to the ones doped with Ag.

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