Sustainable Synthesis of Hierarchically Porous ZSM-5 Zeolite from Iron Ore Tailings Without Secondary Templates
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Currently, it is difficult to realize environmentally friendly synthesis of zeolites due to the use of the solvent. Therefore, it is of great importance to realize zeolite synthesis from iron ore tailings (IOTs) by a solvent-free method. In this work, in situ formed zeolite crystals are self-assembled and IOTs are converted into hierarchically porous ZSM-5. After that, the products prepared are characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy, Fourier transform infrared spectroscopy and nitrogen adsorption. The results demonstrate that the samples show well-defined crystallinity and have micro-/mesoporous structures. The BET surface area is estimated to be 319.809 m2 g−1 and the external surface area is 92.693 m2 g−1, which indicate the as-synthesized ZSM-5 is a good hierarchically porous material. This work provides a reference for green synthesis of hierarchically porous ZSM-5 from IOT.
KeywordsIron ore tailings Hierarchical structure Solvent-free method ZSM-5
This work was supported by the National Nature Science Foundation of China (Project 51874039), National Science and Technology Major Project (2017ZX07402001) and National Key R&D Program of China (2017YFC0210301). The authors would like to thank Yonghong Tang from Shiyanjia lab for support in the FTIR analysis (www.shiyanjia.com).
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