文献类型：期刊文献

中文题名：原位还原MIL-100(Fe)制备多孔碳-铁复合物及其移除甲基橙性能

英文题名：In Situ Reduction of MIL-100(Fe)to Prepare Porous Carbon-Iron Composite and Its Performance in Removing Methyl Orange

作者：成剑钧[1];吴超[1];王喆[1];顾金楼[1]

机构：[1]华东理工大学材料科学与工程学院低维材料化学实验室,上海200237

年份：2018

卷号：44

期号：6

起止页码：831

中文期刊名：华东理工大学学报（自然科学版）

外文期刊名：Journal of East China University of Science and Technology

收录：CSTPCD;;Scopus;北大核心:【北大核心2017】；CSCD:【CSCD_E2017_2018】；

语种：中文

中文关键词：零价铁;甲基橙;金属有机骨架;纳米颗粒

外文关键词：zero-valent iron;methyl orange;metal-organic frameworks;nanoparticles

摘要：纳米零价铁(nZVI)颗粒具有易团聚、不稳定和流动性较差的特点,限制了其在环境中的应用,将纳米零价铁负载于多孔介质上可以提高其反应活性。采用一种新的制备方法,以铁基金属有机骨架(MOFs)的莱瓦希尔骨架材料MIL-100(Fe)为前驱体,通过一步法高温碳热还原制备负载量高、粒径可控和分布均匀的纳米零价铁功能化的多孔碳-铁复合物(nZVI/C),并将其用于水溶性偶氮染料甲基橙(MO)的降解和移除,结果显示nZVI/C对MO的最大吸附容量达到78.4mg/g。进一步考察和优化了时间和pH对nZVI/C吸附能力的影响。
The instability,agglomeration and poor transport properties of nano zero-valent iron(nZVI)greatly limit its application in the removal of contaminants in environmental systems.To resolve these problems,many porous materials are served as a matrix to support nZVI for pollutant remediation.Metal-organic frameworks(MOFs),constructing with inorganic nodes and organic linkers through coordination bonds,are booming as fascinating porous crystalline materials.Herein,Fe-based MOFs MIL-100(Fe)was successfully utilized as a novel precursor for carbothermal reduction synthesis of nZVI/C for effective removal of methyl orange(MO).The effect of carbothermal temperature was studied.Under the optimized carbothermal temperature(750℃),the synthesized nZVI/C had a BET area of364m^2/g and nZVIs with an average distribution of10nm were uniformly distributed in the carbon matrix with high-loading and controllable particle size.As a result,the elaborated sample could rapidly remove methyl orange(MO)in the first20min and the removal efficiency was as high as100%in2h,showing excellent MO uptake performance with the maximum adsorption amounts of78.4mg/g,which was also higher than that of C material.The impacts of the most significant parameters such as contact time,the initial nZVI/C concentration and pH on the removal efficiency of MO and the adsorption capacities were investigated.The removal efficiency on MO increased with nZVI/C concentration while increased pH value led to lower removal efficiency.The removal process was closed to pseudo-second-order model and Langmuir model.The regenerated nZVI/C could still preserve almost half of removal efficiency after three times reuse.Regards to the high BET area with open structure,uniform particle distribution and the relative easiness for large-scale synthesis,nZVI/C holds great potentials for MO decontamination from waste water.