Please use this identifier to cite or link to this item: http://hdl.handle.net/11455/3786
標題: 改質二氧化鈦奈米管之特性研究及其於染料敏化太陽能電池之應用
Synthesis and Characterization of Modified Titanium Dioxide Nanotubes and Application to Dye-Sensitized Solar Cells
作者: 蔡宜臻
Tsai, Yi-Chen
關鍵字: TiO2 nanotubes;二氧化鈦奈米管;chromium-doped;dye-sensitized solar cell;擔持鉻;染料敏化太陽能電池
出版社: 化學工程學系所
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摘要: 
本研究將商業化之二氧化鈦奈米顆粒(Degussa P25)於強鹼環境下水熱處理後,成功地製備出二氧化鈦奈米管,獲得比Degussa P25 更大的比表面積(SBET ≈ 400 m2/g),於450°C 煅燒30 分鐘後得到比表面積為160m2/g,奈米管內徑約為8 ~ 10 nm。以直接水熱法及初濕含浸法對二氧化鈦奈米管進行改質, 使用Cr(NO3)3‧9H2O 作為金屬前驅物來源,以二氧化鈦奈米管為擔體,分別擔持鉻含量為0.5 wt% ~ 5 wt%於二氧化鈦奈米管中。
使用的分析儀器包括XRD、BET、SEM、TEM、EDS、XPS、UV-vis
光譜儀及Raman 光譜儀,對改質前後之二氧化鈦奈米管做特性的分析。SEM 與TEM 可觀察到奈米管狀物的結構;XRD 探討晶型的變化;由BET測得奈米管的比表面積及孔徑分佈;利用UV-vis 光譜儀觀察改質二氧化鈦奈米管前後的吸光範圍;EDS 測得鈦奈米管之組成及元素含量;XPS 得到表面元素的組成;Raman 光譜對表面活性相物質進行分析,以了解表面金屬氧化物之動態變化。
將所製備的二氧化鈦奈米管應用於染料敏化太陽能電池之薄膜電極,並探討使用二氧化鈦奈米管擔持鉻於薄膜電極,探討對染料敏化太陽能電池效能的影響。使用染料為N719,入射光強度為100 mW/cm2情況下,二氧化鈦奈米管為薄膜電極,測得短路電流密度為4.59 mA/cm2,轉換效率為1.66% ; 改質二氧化鈦奈米管為薄膜電極, 測得短路電流密度為4.23mA/cm2,光電轉換效率為1.69%。

Commercial nanocrystalline TiO2 (Degussa P25) was used for preparing titanium dioxide nanotubes (TiNT) by hydrothermal method. Nanocrystalline TiO2 nanotubes have a high specific surface areas (SBET 400 m2/g) compared to the original Degussa P25. After being calcined at 450°C for 30 minutes, it have a tube structure with SBET 160 m2/g and the tube dimeter is approximately 8 nm to 10 nm.
Chromium-doped titanium dioxide nanotubes containing 0.5 wt% ~ 5 wt% Cr using Cr(NO3)3‧9H2O as a precursor were prepared by direct hydrothermal mothod and incipient-wetness impregnation.
The characteristic analysis of the TiNT and the Chromium-doped TiNT were performed by XRD, BET, SEM, TEM, EDS, XPS, UV-vis and Raman spectrometer. From the SEM and TEM images, the tube-like materials were observed. X-ray diffraction patterns confirm the crystal lattice. From the BET measurements, the specific surface area and the pore size distribution were determined. From the UV-vis spectra, the extent of UV-vis absorption between the samples was compared. The EDS obtained the composition of the titanium nanotubes and the element-doped amount. The XPS spectra obtained surface elemental composition. Raman results confirm that the molecular arrangements of the active surface metal oxide have been achieved.
The TiNT and the chromium-doped TiNT were applied in thin film electrode on the dye-sensitized solar cell. By sensitizing the anode with N719 dye and exposing under a light which light intensity is 100 mW/cm2, the electrode made of TiNT obtained short-circuit photocurrent density was 4.59 mA/cm2, and the light-to-electric conversion efficiency was 1.66%; the electrode made of chromium-doped TiNT obtained short-circuit photocurrent density was 4.23 mA/cm2, and the light-to-electric conversion efficiency was 1.69%.
URI: http://hdl.handle.net/11455/3786
其他識別: U0005-3006200919542100
Appears in Collections:化學工程學系所

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