Synthesis and Characterization of an Iron Nitride Constructed by a Novel Template of Metal Organic Framework

Abstract

An iron nitride with high surface area was synthesized from an iron-based metal organic framework (Fe-MOF) in this work. During the synthesis process, the Fe-MOF of MIL-53 served as a hard template, a template to impart a certain degree of morphology for iron oxide products and to form porosities for iron nitride products. Moreover, it played the roles of iron sources for the synthesis of the final iron oxides and the iron nitrides. The physicochemical properties of the materials were characterized by a series of technologies including XRD, SEM, and N 2 -adsorption/desorption. The results showed that the iron nitride synthesized from MIL-53 was -Fe 2-3 N. And, the -Fe 2-3 N showed the morphology with loosely aggregated particles which favored the formation of rich interparticle porosities. As a result, the surface area of the -Fe 2-3 N was larger than those of samples using -Fe 2 O 3 as precursors and its value was 41 m 2 /g. In addition, the results agreed that both raw material properties (such as crystallinity and surface areas) and nitriding approaches had significant effects on the surface areas of iron nitrides. Also the results were proved by the iron oxide synthesized with different methods. This new synthetic strategy could be a general approach for the preparation of late transition metal nitrides with peculiar properties.

Facile Sonochemical Synthesis of Flexible Fe-Based Metal–Organic Frameworks and Their Efficient Removal of Organic Contaminants from Aqueous Solutions

“… 12 , 21 , 26 On the contrary, if sufficient solvent exchange occurs (exchange times >12 h), the MIL-53(Fe) can retain H 2 O molecules instead of DMF molecules (MIL-53(Fe)[H 2 O] form). 15 , 55 − 57 Based on the XRD results and the presence or absence of solvent exchange in the process, we can conclude that the MIL-53(Fe)_UTS retained DMF molecules (MIL-53(Fe)[DMF] form) and that the MIL-53(Fe)_UTS_H 2 O retained H 2 O molecules (MIL-53(Fe)[H 2 O] form) in their pore structures. Several studies have reported on the structure of the MIL-53(Fe)_solvo obtained via XRD analyses.…”

“…In general, as the synthesis of the MIL-53­(Fe) proceeds in DMF, and the as-synthesized MIL-53­(Fe) retains DMF molecules in its pore structure (MIL-53­(Fe)­[DMF] form). If sufficient solvent removal or exchange of the as-synthesized MIL-53­(Fe) does not occur, the MIL-53­(Fe) still retains DMF molecules. ,, On the contrary, if sufficient solvent exchange occurs (exchange times >12 h), the MIL-53­(Fe) can retain H 2 O molecules instead of DMF molecules (MIL-53­(Fe)­[H 2 O] form). ,− Based on the XRD results and the presence or absence of solvent exchange in the process, we can conclude that the MIL-53­(Fe)_UTS retained DMF molecules (MIL-53­(Fe)­[DMF] form) and that the MIL-53­(Fe)_UTS_H 2 O retained H 2 O molecules (MIL-53­(Fe)­[H 2 O] form) in their pore structures. Several studies have reported on the structure of the MIL-53­(Fe)_solvo obtained via XRD analyses.…”

Recent Advances in the Electrocatalytic Application of Transition Metal Nitrides Nanocrystalline

“…Wang et al [56] obtained Co@Co4N/MnO-NC by cracking the Mn-containing molecular sieve-imidazole framework. Liu et al [57] synthesized FeN using the iron foundation organic frameworks as the hard templates. However, as one of the most essential advantages of MOFs, high porosity can also bring a few disadvantages.…”