The present work shows the photocatalytic degradation of nitrobenzene (NB) using Fe₃O₄ magnetic nanoparticles (MNP) as a photocatalyst in the presence of UV light. The MNP were synthesized by an ultrasonic-assisted reverse co-precipitation (US-RP) method using FeSO₄, FeCl₃ and NH₄OH as precursors. The prepared nanoparticles were characterized by UV–vis spectroscopy, attenuated total reflectance Fourier transformed infrared spectroscopy (ATR FT-IR), Raman spectroscopy, X-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM), Dynamic light scattering (DLS), Zeta potential, Vibrating sample magnetometer (VSM) and Magnetic thermogravimetric analysis (MTGA). The successive decrement in the absorbance at 265 nm shows the effective decrease in NB concentration measured by UV–vis spectroscopy. The reaction intermediates detected by gas chromatography/mass spectrum (GC/MS) were 2-nitrophenol (2-NPh), 3-nitrophenol (3-NPh) and 4-nitrophenol (4-NPh). The prepared MNP showed an optimal NB degradation at an initial pH of 2 and 100 ppm of the photocatalyst.

本工作显示了在紫外光存在下，使用Fe ₃ O ₄磁性纳米颗粒（MNP）作为光催化剂，可对硝基苯（NB）进行光催化降解。用FeSO ₄，FeCl ₃和NH ₄通过超声辅助逆共沉淀（US-RP）方法合成MNP。OH为前体。制备的纳米粒子通过紫外-可见光谱，衰减的全反射傅立叶变换红外光谱（ATR FT-IR），拉曼光谱，X射线衍射（XRD），场发射扫描电子显微镜（FE-SEM），动态光散射进行表征（DLS），Zeta电位，振动样品磁力计（VSM）和磁热重分析（MTG​​A）。265 nm处吸光度的连续下降表明，通过UV-vis光谱法测得的NB浓度有效降低。通过气相色谱/质谱（GC / MS）检测到的反应中间体为2-硝基苯酚（2-NPh），3-硝基苯酚（3-NPh）和4-硝基苯酚（4-NPh）。制备的MNP在2的初始pH和100 ppm的光催化剂下显示出最佳的NB降解。