Department of Chemistry, School of Advanced Sciences, VIT University, Vellore, Tamil Nadu, 632 014, India.
Environ Sci Pollut Res Int. 2018 Jul;25(21):20419-20429. doi: 10.1007/s11356-017-9663-4. Epub 2017 Jul 11.
Magnetite (FeO) nanoparticle-encapsulated mesoporous carbon nanocomposite was fabricated from Fe-based metal-organic framework (MOF) (MIL-102) through carbonization. It was found that Fe-based MOF (MIL-102) is a potential precursor for the fabrication of hexagonal mesoporous carbon nanodisk functionalized with FeO nanoparticles. The obtained nanocomposite was characterized by XRD, FT-IR, N adsorption and desorption, FE-SEM and HRTEM techniques. As a Fenton-like solid catalyst for phenol degradation, FeO nanoparticle-encapsulated mesoporous carbon showed greater catalytic activity for the production of hydroxyl radical from the decomposition of HO and it accomplished 100% phenol and 82% total organic carbon (TOC) conversion, within 120 min of reaction. This enhanced catalytic performance was due to confined access for the pollutant to the iron oxide nanoparticles provided by mesopores in carbon shell. Bare FeO nanodisk shows poor catalytic performance in the degradation of phenol, and it obviously reveals the significance of the mesoporous carbon support for iron oxide nanoparticles.
通过碳化法，从基于铁的金属有机骨架（MOF）（MIL-102）制备了磁性纳米颗粒（FeO）包裹的介孔碳纳米复合材料。研究发现，基于铁的 MOF（MIL-102）是一种潜在的前驱体制备具有 FeO 纳米颗粒的六方介孔碳纳米盘的材料。通过 XRD、FT-IR、N 吸附和解吸、FE-SEM 和 HRTEM 技术对所得纳米复合材料进行了表征。作为类 Fenton 固体催化剂用于苯酚降解，FeO 纳米颗粒包裹的介孔碳显示出更高的催化活性，可从 HO 的分解中产生羟基自由基，在 120 分钟的反应时间内，苯酚和总有机碳（TOC）的转化率分别达到 100%和 82%。这种增强的催化性能归因于介孔碳壳中孔为污染物提供了进入氧化铁纳米颗粒的受限通道。裸露的 FeO 纳米盘在苯酚降解中表现出较差的催化性能，这明显显示出介孔碳载体对氧化铁纳米颗粒的重要性。
