磁性纳米金复合材料的合成及催化性能研究  

Study on the synthesis and catalysis performance of magnetic nano gold composites

作　　者：宋茜 吴睿 王玉琳 SONG Xi;WU Rui;WANG Yulin(School of Chemistry and Environmental Science,Shaanxi University of Technology,Hanzhong 723000,Shaanxi,China)

机构地区：[1]陕西理工大学化学与环境科学学院,陕西汉中723001

出　　处：《贵金属》2025年第1期19-25,共7页Precious Metals

基　　金：陕西省科技厅重点研发项目(2024GX-YBXM-318);陕西理工大学研究生课程思政教改项目(SLGYKS2401);陕西理工大学大创新项目(202410720020,SLGHX202404);陕西理工大学教育科研项目(JYYJ2023-16);陕西省汉中中学“十四五”规划课题(1450296)。

摘　　要：以溶剂热法合成磁性的Fe_(3)O_(4)纳米颗粒,改进的Hummers法合成氧化石墨烯(GO),氧化还原法合成纳米金。用超声将Fe_(3)O_(4)和GO结合,并用聚乙烯亚胺(PEI)负载纳米金,制备出具有三层结构的纳米材料Fe_(3)O_(4)/GO/Au。采用X射线衍射(XRD)、红外光谱(FTIR)、紫外可见分光光谱(UV-Vis)、透射电镜(TEM)和扫描电镜(SEM)对合成的材料进行表征。将制备的Fe_(3)O_(4)/GO/Au、Fe_(3)O_(4)/GO作为催化剂对比降解酸性橙Ⅱ(AOⅡ)。研究Fe_(3)O_(4)/GO/Au催化剂用量、酸性橙的浓度对AOII降解效果的影响。结果发现,Fe_(3)O_(4)/GO/Au对酸性橙具有良好的催化降解效果。该材料有望用于对食品、环境和工业中有机染料等污染物催化降解。Magnetic ferric oxide nanoparticles were synthesized by solvothermal method,graphene oxide(GO)was synthesized by modified Hummers method,and Au nanoparticles was prepared by chemical oxidation-reduction method.Then,Fe_(3)O_(4) and GO were combined by ultrasound,and Au nanoparticles was loaded with the aid of polyethylenimide(PEI)to fabricate a three-layer structure of nanomaterial.The synthesized material was characterized by X-ray diffraction(XRD),Fourier-transform infrared spectroscopy(FTIR)and ultraviolet-visible spectroscopy(UV-Vis),transmission electron microscopy(TEM)and scanning electron microscope(SEM).The obtained Fe_(3)O_(4)/GO/Au and Fe_(3)O_(4)/GO were employed as catalyst to compare degradation of AOII.The effects of different experimental conditions on the degradation rate were also discussed,including dosage of catalyst(Fe_(3)O_(4)/GO/Au)and concentration of AOII.The results showed that Fe_(3)O_(4)/GO/Au had a satisfactory catalytic effect on AOII.The material holds promise for the catalytic degradation of organic dyes and other pollutants in food,environment,and industrial applications.

关 键 词：纳米金 氧化石墨烯(GO) 四氧化三铁 催化 酸性橙Ⅱ 

分 类 号：O652.1[理学—分析化学]