Fe_(3)O_(4)/Cu_(2)O-Ag可回收型SERS基底的制备及性能研究

Preparation and study of SERS properties of recyclable Fe_(3)O_(4)/Cu_(2)O-Ag nanocomposites

首先通过水热法合成了Fe_(3)O_(4)纳米花球,并在其表面均匀地修饰了酰胺基功能化的RF(resorcinol-formaldehyde resin)层,再利用原位还原法将Cu_(2)O负载在Fe_(3)O_(4)纳米球表面,最后将Ag纳米颗粒沉积在Fe_(3)O_(4)/Cu_(2)O材料表面,从而制备了Fe_(3)O_(4)/Cu_(2)O-Ag纳米复合材料.采用扫描电子显微镜(SEM)、X射线衍射(XRD)、振动样品磁强计(VSM)等手段对Fe_(3)O_(4)/Cu_(2)O-Ag纳米复合材料的形貌、物相组成和磁学性能进行了表征.此外,以多环芳烃类污染物芘(Pyr)为目标物,对Fe_(3)O_(4)/Cu_(2)O-Ag材料的实际SERS检测性能进行了讨论和分析.结果表明,该纳米复合材料具有优异的SERS活性和磁响应能力,为环境中多种污染物的检测提供了高效低成本的新选择.

The flower-ball-like Fe_(3)O_(4) nanoparticles(NPs)were prepared by hydrothermal method,and the amide functionalized RF(resorcinol-formaldehyde resin)layer was uniformly modified on the surface of Fe_(3)O_(4) NPs.Then Cu_(2)O was loaded on the surface of Fe_(3)O_(4) NPs by in-situ reduction method.Finally,Ag NPs were deposited to construct Fe_(3)O_(4)/Cu_(2)O-Ag magnetic recyclable substrate with SERS activity.The morphology,phase composition and magnetic properties of the composites were characterized by scanning electron microscopy(SEM),X-ray diffraction(XRD)and vibrating sample magnetometer(VSM).The polycyclic aromatic hydrocarbon pollutant pyrene(Pyr)was detected by surface enhanced Raman scattering(SERS).The results show that the Fe_(3)O_(4)/Cu_(2)O-Ag NPs substrate has excellent SERS activity and magnetic response ability,which is expected to become a new choice of recyclable,efficient and low-cost substrate for the detection of various pollutants in the environment.