本研究利用浸鍍法（Dip-coating method）製備含碳之二氧化鈦光觸媒薄膜，期望以簡易的方式製備出具有可見光應答性的光觸媒材料。藉由調整製備的參數，找出最適當的葡萄糖摻雜量與碳化溫度。

實驗中主要以製備含碳源之光觸媒溶膠與浸鍍法製備光觸媒薄膜為研究重點，以控制加熱氣氛與溫度之方式製備光觸媒薄膜，進一步進行光觸媒試片的物理性質及光催化活性測試，以找出光觸媒薄膜之物理特性與活性間的關聯性。物理特性分析以X光繞射（XRD）、掃瞄式電子顯微鏡（SEM）、紫外光-可見光譜儀（UV-Vis spectrometry）、光激發螢光光譜儀（PL）、X射線光電子能譜儀（XPS）、拉曼光譜儀（Raman spectrum）、傅立葉紅外線光譜儀（FTIR）、電化學分析儀（Electrochemical analyzer）與接觸角量測儀（CAM）等儀器對光觸媒試片作分析，以觀察不同的葡萄糖含量與碳化溫度對於表面結構、組成與表面官能基之影響，並探討碳含量對於光線吸收特性、電子與電洞的分離能力與電化學特性對反應活性的影響。光催化活性則分為以氣相與液相反應作討論。液相之光催化反應係以光催化觸媒降解亞甲基藍水溶液作為探討，觀察於可見光與紫外光的照射下，光觸媒對亞甲基藍之脫色能力。氣相則是探討光觸媒薄膜在可見光與紫外光激發下，對無機性氮氧化物氣體的去除能力。

實驗結果顯示摻入適量(50-100 wt%)的葡萄糖改質二氧化鈦與適當的碳化溫度(300oC-350oC)時，在紫外光和可見光照射下其光觸媒薄膜之光催化活性效果最佳。由物理特性分析結果可知碳的摻入，光觸媒薄膜的可見光吸收增加並有效將二氧化鈦能隙縮小。此外，表面的碳具有增加電子與電洞分離的能力，可有效的提升光觸媒薄膜的光催化能力。但若表面上的碳含量過高時會覆蓋住二氧化鈦表面的活性位置，亦會造成活性下降。因此，適當的碳含量與其組成為重要的關鍵。

In this study, the carbon-modified titania (C-TiO2) film was easily prepared by impregnation method with using a glucose-containng TiO2 sol. C-TiO2 films were prepared at the controlled calcination conditions, exhibit highly photocatalytic activity for the degradation of gaseous NOx and decolorization of aqueous methylene blue under visible-light illumination. The effects of carbon content、temperature of carbonation and related structure on photoactivity and physical property were investigated in detail for the optimal amount of glucose.

In the experiment, the physical properties and photocatalytic activities of C-TiO2 films were investigated to clarify the reaction mechanism. Physical properties of the film were determined by X-ray diffractometer (XRD), scanning electron microscope (SEM), ultraviolet-visible spectrometry (UV-Vis Spectrometry), X-ray photoelectron spectroscopy (XPS), photoluminescence (PL) spectroscopy, raman spectroscopy, infrared spectrometer (IR), electrochemical analyzer and contact angle meter (CAM), respectively. These results indicated the differences among the films in the surface structure, composition, functional groups, light absorption range, recombination rate of e−/h+ pairs, and photoelectrochemical behavior.

The results show that the suitable addition amount of glucose is 50-100 % and the suitable temperature of carbonation is 300oC-350oC for good photocatalytic activity under ultraviolet and visible- light irradiations. The carbonaceous species on the TiO2 surface enhances the visible-light absorption of TiO2 films, resulting in the decrease in band gap. In addition, the introduction of carbonaceous species can also reduce the efficiency of electrons–hole pair, so the C-TiO2 film has a better photocatalytic ability than pure TiO2 film. However, the excessive amount of carbon lessens photocatalytic ability due to the serious coverage effect on active sites on the TiO2 surface. Therefore, the amount and structure of carbonaceous species on the TiO2 surface play important roles in the visible-light absorption and photocatalytic degradation rates for NOx and dye.

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