摘要
利用二茂铁的水热氧化分解在硅胶颗粒表面包覆Fe_3O_4-C壳层,除去核心硅胶后,制备了一种磁性空心纳米微球。合成的磁性纳米微球直径为280nm,壳层厚度为20nm,为典型的空心结构,其主要成分Fe_3O_4可作为类芬顿反应催化剂,其表面的亲水碳层和空心结构的限域效应进一步增强了催化活性,可高效降解有机污染物,在H_2O_2浓度为1.2mol/L,环境温度为35℃,酸性和中性条件下,0.2g/L的Fe_3O_4-C空心纳米微球在0.5h内能够将1mmol/L的苯酚基本完全降解。而且该纳米反应器具有超顺磁性和较高的饱和磁通量(42.5emu/g),处理之后可以方便地分离回收,以便重复使用,节约了处理成本。
Fe3O4-C double shell was fabricated onto the surface of silica sphere template through hydro-thermal oxidation decomposition of ferrocene,followed by removal of the silica core to obtain the hollow magnetic microsphere.The magnetic microsphere,with280nm in diameter and20nm in shell thickness,has typical hollow structure.The major component(Fe3O4)could serve as fenton-like catalyst and the superficial hydrophilic carbon layer and the confinement effect of the hollow structure further enhanced the catalytic performance,so that the obtained material exhibited superior degradation ability toward organic pollutant.Thirty min was enough for th2O2and0.2g/L of Fe3O4-C hollow catalyst).Furthermore,the superparamagnetism and high magnetic saturation value(42.5emu/g)facilitated the facile recovery of the catalyst from the matrix solution and improved the reusability which greatly saved the treatment cost.
作者
张小乐
靳惠文
陈泰宇
蔡世欣
杨植森
寇呈熹
路大帅
ZHANG Xiao-Le;JIN Hui-wen;CHEN Tai-yu;CAI Shi-xin;YANG Zhi-sen;KOU Cheng-xi;LU Da-shuai(College of Life Science,North China University of Science and Technology,Tangshan Hebei 063210,China)
出处
《华北理工大学学报（自然科学版）》
CAS
2019年第1期20-26,共7页
Journal of North China University of Science and Technology：Natural Science Edition
基金
国家自然科学基金项目(21377034)
大学生创新创业训练计划项目(X2018279)
关键词
磁性空心微球
合成
类芬顿反应
催化降解
苯酚
magnetic hollow microsphere
synthesis
fenton-like reaction
catalytic degradation
phenol
