可見光二氧化鈦奈米管製備、改質及 光觸媒性質之研究

Synthesis and Photocatalysis of the Titanium Dioxide Nanotubes by Plasma Surface Modification

游智宏(Jhin-Hong You)

指導教授 ： 鍾財王

中原大學/工學院/化學工程研究所/碩士(2005年)

https://doi.org/10.6840/cycu200500334

摘要

摘要
利用水熱法(Hydrothermal method)將商業化二氧化鈦粉末(ST-01)，製備成二氧化鈦奈米管，奈米管內徑約20~50 nm，長度可達10~103 nm不均一，能有效的提升二氧化鈦的光催化反應效率，其實驗方法簡單。所製備出的二氧化鈦奈米管，運用電漿表面改質技術，製備出可見光化二氧化鈦奈米管，或使用高溫煅燒改質，改善奈米管的晶型。

使用的分析儀器包括SEM、TEM、XRD、BET及UV/VIS光譜儀等儀器，在SEM與TEM上，可觀察到奈米管狀物的結構，從XRD中，探討晶型的變化，由BET可測得奈米管的表面積及孔徑分布，利用UV/VIS光譜儀，可觀察改質二氧化鈦奈米管前後的吸光度。

最後將二氧化鈦奈米管進行可見光/UV分解異丙醇實驗，求得擬一階速率常數kapp、吸附常數K與反應速率常數k，探討奈米管的光分解效果及吸附效果，針對不同濃度下之異丙醇光分解結果，進行反應動力模式之探討。

關鍵字

光催化反應 ； 水熱法 ； 電漿改質 ； 二氧化鈦奈米管

並列摘要

Abstract
The titanium dioxide nanotubes were prepared by hydrothermal method from the commercial TiO2 (ST-01). The titanium dioxide nanotubes have the inner diameter of 20-50 nm, and length of 10~103 nm. Its photocatalytic efficiency was raised up effectively. A visible-light-responsive titanium oxide nanotubes was successfully produced by this new plasma-heat process. In order to improve crystalline, high temperature to calcine titanium oxide nanotubes was used.

There are many instruments of analysis to be used, including SEM、TEM、X-ray powder diffraction、BET and UV/VIS spectrometer. From the SEM and TEM results, the tube-like materials and its structure were observed. From the XRD result, the change of lattice constants was confirmed. From the BET result, the area and pore size were obtained. From the UV/VIS spectrometer result, the UV/VIS absorption was obtained.

Finally, on irradiating with a UV/VIS light lamp, the photocatalytic reaction of 2-Propanol (IPA) by using titanium dioxide nanotubes was significant. The reaction kinetic model was applied to discuss the photocatalytic results and adsorption results at different IPA concentrations.

並列關鍵字

plasma ； titanium dioxide nanotube ； photocatalytic ； hydrothermal method

參考文獻

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