罗丹明B
石墨烯
催化作用
材料科学
纳米颗粒
氧化物
傅里叶变换红外光谱
化学工程
分解
吸附
扫描电子显微镜
磁性纳米粒子
核化学
无机化学
纳米技术
化学
物理化学
有机化学
复合材料
工程类
冶金
光催化
作者
Rida Tabit,Othmane Amadine,Younes Essamlali,Karim Dânoun,Abdallah Rhihil,Mohamed Zahouily
出处
期刊:RSC Advances
[The Royal Society of Chemistry]
日期:2018-01-01
卷期号:8 (3): 1351-1360
被引量:107
摘要
Herein, we report the preparation of magnetic CoFe2O4 nanoparticles and CoFe2O4/graphene oxide (GO) hybrids and evaluate their catalytic activity as heterogeneous peroxymonosulfate (PMS) activators for the decomposition of rhodamine B. The surface morphologies and structures of both CoFe2O4 nanoparticles and CoFe2O4/GO hybrids were investigated by powder X-ray diffraction (XRD), scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS), Fourier transform infrared spectroscopy (FTIR) and nitrogen adsorption-desorption isotherms. The magnetic properties of the samples were assessed using a SQUID magnetometer at 298 K. Catalytic oxidation experiments demonstrated that CoFe2O4/GO hybrids exhibited much better catalytic activity than CoFe2O4 nanoparticles or CoFe2O4/reduced graphene oxide (rGO) hybrids, suggesting that GO plays an important role in CoFe2O4/GO hybrids in the decomposition of rhodamine B. The influence of various reaction conditions such as temperature, concentration of PMS, pH and decomposition time of rhodamine B over the CoFe2O4/GO catalyst were investigated and optimized. The rhodamine B degradation process was found to fit a pseudo-first order kinetics model. The catalyst could be easily separated from the reaction mixture by applying an external magnet. In particular, the as-prepared CoFe2O4/GO hybrid exhibited good reusability and stability in successive degradation experiments in PMS solution.
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