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年度	110	專案性質	實驗性質
專案類別	研究專案	研究主題	整治
申請機構	中山大學	申請系所	環境工程研究所
專案主持人	彭彥彬	職等/職稱	副教授
專案中文名稱	新型光電化學系統處理地下水三氯乙烯污染物之研究
中文關鍵字	地下水, 三氯乙烯, 二氧化鈦奈米管陣列, 鐵
專案英文名稱	Study on remediation of TCE contaminated groundwater by novel photoelectrochemical system for
英文關鍵字	groundwater, TCE, titanate nanotube arrays, Fe
執行金額	939,730元
執行期間	2021/1/1 至 2021/12/31
計畫中文摘要	本研究以陽極蝕刻法製備二氧化鈦奈米管陣列(Titanate nanotube arrays，TNAs)，TNAs的晶相透過XRD分析，於 2θ = 25.3°、37.8°及54.0°出現銳鈦礦(Antase)的特徵峰，所對應到的晶面分別是(101)、(004)及(105)。並透過含浸法(Impregnation)將鐵負載於二氧化鈦奈米管陣列上，XRD分析結果顯示，Fe-TNAs於2θ=24.16°、35.74°、54.23°、62.26°出現鐵的繞射峰，所對應的晶面分別為(012)、 (110)、 (116)、(214)；AFE-SEM分析顯示鐵以奈米顆粒(Nanoparticles，NPs)型態均勻附載於TNAs的管口上；XPS元素組成分析顯示Fe-TNAs-St-27 mL之鐵原子比例為4.9%，且鐵元素為Fe3+形態附載於TNAs。透過UV-vis分析，鐵奈米顆粒的附載可以使光觸媒材料吸收波長紅移至543 nm，並有效降低能隙至2.53 eV。透過電流測試(I-T test)解析，Fe-TNAs-St-27 mL與TNAs之光電流分別為4.94與2.83 mA/cm2。以EPR解析Fe-TNAs-St-27 mL可於光電化學系統中產生氫氧自由基，以其強氧化力對三氯乙烯進行降解。EIS分析中，Fe-TNAs-St-27 mL之Rp (55.1 Ω)小於TNAs之Rp(108.5 Ω)，證實奈米鐵可以降低電子電洞再複合率。以Fe-TNAs-St-27 mL作為工作電極時，陽極槽降解三氯乙烯反應速率常數為0.0794 min-1，陰極槽的降解三氯乙烯反應速率常數則為0.0037 min-1。在重複性測試中，Fe-TNAs-St-27 mL材料可以維持其光催化能力，顯見藉由光電系統可提供一經濟可行降解水中三氯乙烯方式。
計畫英文摘要	This study used anodization method to synthesize titanate nanotube arrays (TNAs) and further employed impregnation method to deposit iron nanoparticles (NPs) on the TNAs. The results of XRD showed characteristic peaks of anatase at 2-theta angle of 25.3°, 37.8° and 54.0°, corresponding to the (101), (004), and (105). On the other hand, the iron characteristic peaks were observed at 2θ = 24.16°, 35.74°, 54.23°, and 62.26°, corresponding to (012), (110), (116), and (214). AFE-SEM images of Fe-TNAs showed that the Fe NPs, with an atomic percentage of 2.75%, deposited firmly and evenly on the surface of TNAs. Results of Uv-vis analyses showed the absorb-ance wavelength of Fe/TNAs red-shift to 543 nm after Fe modification that is favor for light utilization. The photocurrent-time response plot of Fe-TNAs revealed that the photocurrent is 4.94 and 2.83 mA/cm2 for Fe-TNAs-27 and TNAs, respectively. Ac-cording to the results of EIS analysis, the Rp was 55.1 and 108.5 Ω for Fe-TNAs-St-27 mL and TNAs, respectively, indicating that depositing iron NPs on the TNAs can re-duce the recombaination of electron-hole pairs. The rate constants of TCE PEC degra-dation, by using TNAs-St-27 mL as working electrode, were 0.0794 min-1 in the anod-ic chamber and 0.0037 min-1 in the cathodic chamber. In the repeatability test, the Fe-TNAs-St-27 mL material can maintain its photocatalytic ability. This study has proved that Fe-TNAs-St-27 mL PEC system is an economical and feasible way to degrade trichloroethylene in water.