Jiang Jizhou, Zou Jing, Zhu Lihua, Huang Lei, Jiang Haipeng, Zhang Yuanxiao
School of Chemical Engineering and Pharmacy, Wuhan Institute of Technology, Hubei Key Lab of Novel Chemical Reactor and Green Chemical Technology, Wuhan 430074, PR China.
J Nanosci Nanotechnol. 2011 Jun;11(6):4793-9. doi: 10.1166/jnn.2011.4192.
Fe3O4 magnetic nanoparticles (Fe3O4 MNPs) were successfully prepared through an advanced reverse co-precipitation method under the assistance of ultrasound irradiation. The structure and size distribution were characterized by X-ray powder diffraction (XRD), laser particle size analyzer (LPSA), Fourier transform infrared spectroscopy (FT-IR) and Raman spectroscopy. The magnetic properties of Fe3O4 nanoparticles were measured by the vibrating sample magnetometer (VSM). Such Fe3O4 MNPs were used as a peroxidase mimetic to remove the dye pollutant methylene blue (MB) in the presence of H2O2. Some important reaction parameters were optimized to improve the degradation of MB. It was observed that the degradation efficiency of 10 mg L(-1) MB was above 96% over 0.62 g L(-1) Fe3O4 MNPs within 0.30 mmol L(-1) H2O2 at pH 4.85 and temperature 25 degrees C in 15 min, being superior to the previous reports.
通过先进的反向共沉淀法，在超声辐照辅助下成功制备了四氧化三铁磁性纳米颗粒（Fe3O4 MNPs）。采用X射线粉末衍射（XRD）、激光粒度分析仪（LPSA）、傅里叶变换红外光谱（FT-IR）和拉曼光谱对其结构和尺寸分布进行了表征。用振动样品磁强计（VSM）测量了Fe3O4纳米颗粒的磁性。在H2O2存在的情况下，将这种Fe3O4 MNPs用作过氧化物酶模拟物以去除染料污染物亚甲基蓝（MB）。优化了一些重要的反应参数以提高MB的降解率。观察到在pH 4.85、温度25℃、0.30 mmol L(-1) H2O2条件下，0.62 g L(-1) Fe3O4 MNPs在15分钟内对10 mg L(-1) MB的降解效率高于96%，优于先前的报道。
