本研究以自製的二氧化鈦奈米管及奈米棒分別進行製作染料敏化太陽能電池及光觸媒降解偶氮染料Reactive Black B(RBB)染料的研究。在染料敏化太陽能電池方面，以純奈米二氧化鈦纖維製作的電池由於薄膜緻密程度不佳，效果不好。但以混摻奈米二氧化鈦顆粒及纖維所製得的太陽能電池，因奈米二氧化鈦顆粒可提供高表面積及緻密度，再加上奈米二氧化鈦纖維的長度可提供連續導電性，使得光電轉換效率大大提升到7.5%。進一步地，本研究製得第一層為二氧化鈦顆粒狀結構，第二層為奈米二氧化鈦顆粒混合纖維結構的電池時，可提供較多光線反射使染料的光線利用率增加，效率可進一步提升至7.71%。
在二氧化鈦光觸媒降解RBB方面，高比表面積的二氧化鈦奈米管降解效果比奈米棒來得好，而添加水玻璃時，在450℃一起燒結的二氧化鈦奈米管會產生部分Ti-O-Si鍵結及能隙(band gap)降低，並且形成直徑更小且比表面積更大的型態，能在60分鐘將RBB由200ppm降至46ppm；當燒結溫度提高至650℃時，會有部分金紅石礦(Rutile)晶相出現，使得電子電洞不易再結合，降解效果變好可降解至35.35ppm。

Both of the nanofibers-nanorods and nanotubes of TiO2 were synthesized to fabricate the dye-sensitized solar cells and applied to RBB photo-degradation. In dye-sensitized solar cells, due to the films prepared by the TiO2 nanofibers were not dense, the efficiency of photo-electrical transformation is low. Mixing with TiO2 nanoparticles and nanorods could have better efficiency of 7.5% photo-electrical transformation because the TiO2 nanoparticles have high specific surface areas and TiO2 nanofiber’s length can offer continuity current channel. Furthermore, when the first layer was prepared by TiO2 nanoparticles and the second layer are prepared by the mixing of the TiO2 nanoparticles with TiO2 nanorods, the efficiency of the photo-electrical transformation would high to 7.71% due to large surface area.
On the other hands, the photo-degradation rate of RBB induced by TiO2 nanotube was fast than nanorods due to the high specific surface areas of nanotube. When the SiO2 was mixed with TiO2 nanotubes and sintered in 450℃, the new Ti-O-Si bond was appeared from the IR measurement. In addition, the RBB was degradated from 200ppm to 46ppm in 60mins as the SiO2/TiO2 mixtures were used as catalyst. Moreover, as the rutile structure of TiO2, which was sintered in 650℃, was appeared, the degradation effect become better. RBB can be degradated to 35.35ppm in 60min. This result was attributed from the electron and hole can’t recombine in the rutile structure of TiO2.

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