铜铁氧体-纳米纤维素磁性复合材料的制备、表征及催化还原对硝基酚性能

摘要

In this article,Magnetic CuFe2O4-CNC compositewasprepared via aone-step solvothermal method,using FeCl3,CuCl2,NaAc and CNC as the sources of Fe,Cu,N and carrier,respectively.The magnetic CuFe2O4-cellulose nanocrystals (CuFe2O4-CNC) composites were characterized by inductive coupled plasma emission spectrometer atomic emission spectrometry (ICP-AES),transmission electron microscopy (TEM),Fouriertransform infrared spectrometer (FT-IR),X-ray diffraction (XRD),specific surface areas analyzer (BET),vibrating sample magnetometer(VSM) and thermogravimetric (TG-DSC).The results showed that the CuFe2O4-CNC was cubic spinel crystal structure and the composites exhibited a nanosphere structure with about 10 nm.It could be found that the CuFe2O4-CNC composite presented the maximum saturationmagnetization of 171.56 kA/m,respectively.Both of them weresuperpararnagnetic materials.The CuFe2O4-CNC composite at 200℃ for 8h had larger specific surface areas and catalytic activity to degrade4-nitrophenol.%采用一锅溶剂热法,分别以三氯化铁(FeCl3)、二氯化铜(CuCl2)、醋酸钠(NaAc)、聚乙二醇(PEG6000)、纳米纤维素晶体(CNC)作为铁源、铜源、碱源、表面活性剂和载体,在CNC表面原位合成了铜铁氧体-纳米纤维素(CuFe2O4-CNC)磁性复合材料,并根据其对于对硝基酚催化还原性能的好坏作为标准优化其制备工艺.另外,通过电感耦合等离子体原子发射光谱(ICP-AES)、透射电子显微镜(TEM)、傅里叶红外光谱仪(FT-lR)、X射线衍射仪(XRD)、比表面积分析仪(BET)、振动样品磁强计(VSM)、同步热分析仪(TG-DSC)和紫外-分光光度计(UV-Vis)对制备的复合材料进行结构及性能表征.结果表明,所制备的CuFe2O4-CNC磁性复合材料为单一尖晶石结构,磁性复合材料尺寸约10 nm,最大饱和磁化强度Ms为171.56 kA/m,且为典型的超顺磁性材料;在反应温度为200℃、反应时间为8h的条件下制备的CuFe2O4-CNC磁性复合材料具有较高的比表面积和较好的催化还原对硝基酚性能.