電池結合光電-芬頓高級氧化程序(AOPs)可形成系統自保持機制；其具陽極產電及陰極淨化汙廢水之功效；陰極電極可透過表面處理以優化整體系統之效能。本研究透過水熱法合成含氧缺陷結構二氧化錫(SnO2-x)，並擇取奈米碳管(CNT)作為電子載體，以此於SS316L 不銹鋼表面製備SnO2-x/CNT 複合塗層，期望建構良好光電協同作用並提供電極耐腐蝕性藉此提升系統運行成效。實驗包含：(1) X 光電子能譜儀(XPS)；(2) 四點探針測試平台；(3) 線性掃描伏安法(LSV)；(4) 紫外/可見光分光光譜儀(UVVis)；(5) 螢光光譜儀(PL)；(6) 動電位極化法(Tafel)；(7) 光電-芬頓系統脫色效率測試。結果顯示，SnO2-x/CNT/SS316L 複合電極，系統染料脫色率從28.4%提升至67.8%，證實建構氧缺陷結構可有效提升光電-芬頓系統效能，於未來具深入研究與應用價值。

The integration of fuel cells with photoelectro-Fenton advanced oxidation processes (AOPs) can establish a self-sustaining mechanism inside a system. This system provides the benefits of generating anodic electricity and purifying dirty wastewater using cathodic techniques. Surface treatment of the cathode can enhance the performance of the entire system. In this study, oxygen-deficient tin dioxide (SnO2-X) with a defect structure was synthesized using a hydrothermal method. Carbon nanotubes (CNTs) were selected as electron carriers, and a SnO2-X/CNT composite coating was prepared on the surface of SS316L stainless steel to establish effective synergistic photoelectro interactions and enhance system performance. The utilized experimental procedures comprise: (1) X-ray photoelectron spectroscopy (XPS); (2) four point probe test; (3) linear sweep voltammetry (LSV); (4) ultraviolet-visible spectroscopy (UV-Vis); (5) photoluminescence spectroscopy (PL); (6) Potentiodynamic polarization (Tafel), and (7) dye degradation efficiency testing in the photoelectro-Fenton system. The results demonstrate that the SnO2-x/CNT/SS316L composite cathode significantly improved the dye degradation efficiency from 28.4% to 67.8%. This confirms the efficacy of designing an oxygen-deficient structure to increase the performance of the photoelectro-Fenton system. This study holds significant research and application potential for investigations in the future.