摘要
以硫酸铜、硫酸亚铁为金属源,腐植酸作为碳源,采用共沉淀-焙烧法制得C/Cu/Fe_(3)O_(4)纳米复合物。通过扫描电子显微镜(SEM)、X射线衍射(XRD)、傅里叶变换红外光谱(FI-IR)、比表面积及孔隙度分析、透射电子显微镜(TEM)和振动样品磁强计(VSM)等手段对复合物的结构和组成进行表征,并利用紫外-可见吸收光谱(UV-Vis)监测硼氢化钠还原对硝基苯酚(4-NP)和邻硝基苯胺(2-NA)的反应进程。结果显示C/Cu/Fe_(3)O_(4)复合物由纳米颗粒聚集体构成,具有较大的比表面积(142.3 m^(2)/g)和较强的磁性(24.0 emu/g)。催化测试结果表明C/Cu/Fe_(3)O_(4)不仅显示出较高的催化活性,还可从液相体系通过磁致分离回收。这些结果有助于拓宽腐植酸在纳米催化剂合成以及有机污染物废水处理领域的应用。
The C/Cu/Fe_(3)O_(4) nanocomposite was prepared by coprecipitation-roasting method with copper sulfate and iron(Ⅱ)sulfate as metal sources and humic acid as carbon source.The structure and compositionof this nanocomposite were characterized by scanning electron microscopy(SEM),transmission electron microscopy(TEM),X-ray diffraction(XRD),Fouriertransform infrared spectroscopy(FT-IR),surface area and porosity analyses,and vibrating sample magnetometer(VSM).Its catalytic properties for p-nitrophenol(4-NP)and o-nitroaniline(2-NA)reductions in the presence of excessive sodium borohydride were monitored by UV-visible spectroscopy(UV-Vis).It can be found that the prepared C/Cu/Fe_(3)O_(4) nanocomposite with large specific surface area(142.3 m^(2)/g)and good magnetic property(24.0 emu/g)is composed of nanoparticle aggregates.The catalytic tests show that C/Cu/Fe_(3)O_(4) nanocomposite not only has high catalytic activity,but also enables to be recovered from the liquid phase system by magnetic separation.It will benefit to extend the application of humic acid in the synthesis of nanocatalysts and the treatment of organic pollutants.
作者
赵莉倩
李子霄
魏丹娣
王相龙
杨超
ZHAO Li-qian;LI Zi-xiao;WEI Dan-di;WANG Xiang-long;YANG Chao(School of Chemistry Engineering,Xinjiang University,Urumqi 830046,Xinjiang,China)
出处
《化学工程》
CAS
CSCD
北大核心
2021年第1期60-64,共5页
Chemical Engineering(China)
基金
国家自然科学基金资助项目(51564045)。
