本研究以摻雜氧化鐵及銅元素來使二氧化鈦的吸光範圍更接近可見光，以降解有機汙染物如剛果紅及雙酚A。本研究以水熱法先製備有磁性的四氧化三鐵與二氧化鈦之複合材料（Fe3O4@TiO2,FT)，再將硫酸銅加入FT分散液並水浴加熱，製得銅添加之四氧化三鐵與二氧化鈦複合材料(Culoading Fe3O4@TiO2, CFT)，並以不同溫度鍛燒CFT。以X光繞射分析、傅立葉轉換紅外光譜、X光吸收近邊緣結構及紫外光可見光分光光度計等材料特性分析。雖然材料鍛燒後仍有磁性，但鐵、鈦及銅的平均價數均接近最高氧化態。鍛燒後四氧化三鐵的晶相變的不明顯，但銳鈦礦的（101)特徵峰卻變得明顯，應是鐵在高溫下逐漸氧化，而二氧化鈦則慢慢結晶所致。UV-Vis證實材料在可見光範圍有一定吸光，經過350度鍛燒之CFT具有最高可見光吸收。利用可見光及長波長紫外光(UVA)之光照，可降解剛果紅及雙酚A。經過500度鍛燒之CFT具有較高之雙酚A去除能力，但剛果紅則是沒有鍛燒的CFT具有較佳去除能力。本研究成果將有助了解以溶膠凝膠法合成複合材料之特性及其汙染物移除能力。

To shift the absorbance range of TiO2 into visible light, Fe3O4@TiO2 (FT) prepared by hydrothermal method was further synthesized to form the Cu loading Fe3O4@TiO2 (CFT) by adding the copper sulfate into FT. CFT samples were then calcinated in different temperatures. The removal of Congo red and bisphenol A (BPA) was performed with these calcinated CFTs. CFTs were analyzed in X-ray diffraction, Fourier-transform infrared spectroscopy, X-ray absorption near-edge structures and UV-Vis spectrophotometer. Although the titanium, iron and copper reached the highest oxidation state for all CFTs, their magnetism was still kept after the calcination. The features of Fe3O4 disappeared gradually by the rising of calcination temperature but those of TiO2 were more obvious, indicating that iron could be further oxidized and TiO2 was formed. By the UVVis analysis, CFTs can absorb visible light and 350 CFT had the highest absorbance. Under visible light and UVA, Congo red and BPA were degraded with CFTs. Calcinated CFT at 500oC had a higher BPA removal rate than others. But for Congo red, CFT had a higher removal rate than others. This study provided some better understandings for the modified TiO2 synthesis through sol-gel methods and its application in the removal of organic pollutants.