【摘要】 以FeCl3为铁源,葡萄糖为碳源,钛酸四丁酯为钛源,采用水热法制备了磁载光催化剂Fe3O4/C/TiO2,用TEM、EDX、VSM、XRD和IR对Fe3O4/C/TiO2的粒径、形貌和物相等进行了表征。研究了该催化剂对三氯苯酚的降解性能,探讨了其重复使用的可能性,用荧光光谱法推测了可能的反应机理。结果表明该材料结合了光催化与可再生的优点,1 g·L-1 Fe3O4/C/TiO2在18 W紫外灯下,50 min内可将三氯苯酚降解97.9%以上,6次循环使用后降解率仍保持在95.1%,降解过程中有羟基自由基生成。更多还原

【Abstract】 A separable magnetic photocatalyst(Fe3O4/C/TiO2) was prepared by a hydrothermal reaction with the reaction of FeCl3,glucose and tetrabutyltitanate.The catalyst Fe3O4/C/TiO2 was characterized in terms of particle size,morphology and phase by transmission electron microscopy(TEM),energy dispersive X-ray(EDX) spectrometry,vibration sample magnetometry(VSM),X-ray diffraction(XRD) and Fourier transform infrared spectroscopy(FTIR).The catalytic activities and mechanism were evaluated by degradation of 2,4,6trichlorophenol(TCP) aqueous solution.The reaction mechanism was investigated by the fluorescence technique.The results indicate that the catalyst has high degradation abilities and can be easily separated and reused by an external magnetic field.TCP can be effectively degraded by 97.9% in the use of 1 g·L-1Fe3O4/C/TiO2 under 18 W UV light within 50 min.A degradation rate of 95.1% can be maintained after 6 cycles.The hydroxyl radicals(OH) have been detected in the reaction.更多还原