Rao Wenxiu, Liu Hao, Lv Guocheng, Wang Danyu, Liao Libing
Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes, National Laboratory of Mineral Materials, School of Materials Science and Technology, China University of Geosciences, Beijing 100083, China.
School of Science, China University of Geosciences, Beijing 100083, China.
Materials (Basel). 2018 Nov 7;11(11):2212. doi: 10.3390/ma11112212.
Nano zero-valent iron has drawn great attention for the degradation of organic dyes due to its high reactivity, large specific surface area, lightweight, and magnetism. However, the aggregation and passivation of iron nanoparticles may prohibit the wide use of it. A new composite material was prepared by loading nano zero-valent iron (nZVI) on montmorillonite (MMT) to overcome the above shortcomings and it was further used for the removal of Rhodamine 6G (Rh 6G) under microwave treatment in the present work. The effects of various parameters, including the initial concentration of Rh 6G, microwave power, and pH value were investigated. The new composite material (nZVI/MMT) showed an excellent degradation ability for removing Rh 6G, and the removal amount reached 500 mg/g within 15 min. The degradation rate reached 0.4365 min, significantly higher than most previous reports using other removal methods for Rh 6G.
纳米零价铁因其高反应活性、大比表面积、轻质和磁性而在有机染料降解方面备受关注。然而，铁纳米颗粒的聚集和钝化可能会阻碍其广泛应用。在本工作中，通过将纳米零价铁（nZVI）负载在蒙脱石（MMT）上制备了一种新型复合材料，以克服上述缺点，并进一步用于在微波处理下去除罗丹明6G（Rh 6G）。研究了各种参数的影响，包括Rh 6G的初始浓度、微波功率和pH值。新型复合材料（nZVI/MMT）对去除Rh 6G表现出优异的降解能力，15分钟内去除量达到500 mg/g。降解速率达到0.4365 min，明显高于以往大多数使用其他去除方法处理Rh 6G的报道。
