射頻電漿改質光催化劑TiO2@g-C3N4 Z-Scheme的結構並提高可見光下對一氧化氮的降解率

Plasma-treated Photocatalytic Substrates based on TiO2@g-C3N4 Z-Scheme structure to enhance the NO degradation under Visible light

劉洪光(HONG QUANG LUU)

指導教授 ： 王雅玢 ； 游勝傑

中原大學/工學院/環境工程學系/碩士(2022年)

https://doi.org/10.6840/cycu202201059

摘要

本研究以商業二氧化鈦(TiO2)和尿素使用一步驟熱裂解法， 成功地產出 TiO2@gC3N4 異質接面複合材料，本研究嘗試研究此複合材料在可見光下對一氧化氮
（ NO）的降解光催化性能。 研究採用漫反射光譜法（ DRS）來評估所選材料的
光吸收和能隙， 以證明材料在可見光下具有明顯的光催化活性。在可見光照明
下， 於玻璃、薄膜和薄膜基材上的 NO 光降解效率分別約為 90.14%、 87.77%和
84.50%。為了評估光催化過程中 NO 的轉化途徑， 研究中計算副產品和二氧化氮
（ NO2）的生成。此外， TiO2@g-C3N4 複合材料在五次重複使用性測試後， 表現
出良好的穩定性，重複使用後其效能下降幅度小於 10%。 另外研究應用高解像
能電子顯微鏡（ HR-TEM）圖片和 X 射線光電子能譜儀（ XPS） 來檢查材料的形
態和化學組成，以及使用拉曼光譜儀檢測材料的結構振動。 TiO2@g-C3N4複合材
料的光催化過程也通過電子自旋共振（ ESR）和誘捕研究進行分析研究， 結果顯
示超氧陰離子於去除 NO 方面發揮了重要作用。

關鍵字

石墨碳氮化合物 ； 可見光 ； 氮氧化物 ； 光催化 ； 二氧化鈦

並列摘要

TiO2@g-C3N4 heterojunction composites were successfully produced utilizing
commercial TiO2 and urea in a one-step pyrolysis. The degradation of nitric oxide (NO)
under visible light was used to study the photocatalytic performance of a composite. The
diffuse reflectance spectroscopy (DRS) was used to assess the light absorption and
bandgap of the selected materials, which proved the materials' significant photocatalytic
activity under visible light. Under visible illumination, the NO photodegradation
efficiency on glass, film and membrane substrates were about 90.15%, 87.77% and
84.50%, respectively. To evaluate the conversion route of NO during the photocatalytic
process, the formation of byproducts and nitrogen dioxide (NO2) was calculated.
Furthermore, the TiO2@g-C3N4 demonstrated good stability after five reusability tests,
with less than 10% decline in reusability. High-resolution transmission electron
microscopy (HR-TEM) pictures and X-ray photoelectron spectroscopy were also used
to examine the morphology and chemical contents of the materials (XPS). The structural
vibrations in the materials were detected using Raman spectroscopy. The photocatalytic
process of the TiO2@g-C3N4 composite was also unraveled using electron spin
resonance (ESR) and trapping studies, with electron factor revealed to play a substantial
role in NO removal.

並列關鍵字

Visible light ； Nitric oxide ； Photocatalyst ； g-C3N4 ； TiO2

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