原位还原制备滤纸载纳米银粒子复合材料及其催化特性

摘要

The silver nanoparticles/filter paper (AgNPs/FP) composites were successfully preparedvia in-situ reduction by employing filter paper as both reducer and carrier in alkaline conditions based on green chemistry. The morphology,composition,and catalytic properties of the prepared AgNPs/FP composites were characterized by scanning electron microscopy (SEM),energy-dispersive spectroscopy (EDS),thermogravimetric analysis (TGA) and UV-visible (UV-vis) spectrophotometry. SEM images showed the spherical AgNPs evenly distributed on the surface of the filter paper,which was testified further by UV-vis spectroscopy,EDS and TGA. In addition,the obtained AgNPs/FP composite exhibited good catalytic activity for the reduction of 4-nitrophenol (4-NP) and could be recycled easily.%基于绿色化学的角度，直接以滤纸（FP）为基底材料，在碱性条件下无需外加还原剂和稳定剂，原位还原得到负载纳米银（AgNPs）的AgNPs/FP复合材料。通过扫描电子显微镜（SEM）、X射线电子能谱仪（EDS）、热重分析仪（TGA）和紫外-可见（UV-vis）分光光度计等对复合材料的形貌、组成和催化性能进行表征。研究结果表明，Ag+被还原为AgNPs后致密又均匀地负载于滤纸表面上，所制得的AgNPs/FP复合材料中纳米银呈球形、尺寸均一且团聚较少。AgNPs/FP复合材料对对硝基苯酚（4-NP）的还原具有较好的催化活性，且易于回收再利用。