Facile Large‐Scale Synthesis of Nanoscale Fayalite, α‐Fe2SiO4. Issue 11 (19th April 2017)

• Record Type: Journal Article
• Authors: Chang, Qiang; Zhang, Chenghua; Liu, Chengwei; Li, Ke; Yun, Yifeng; Cheruvathur, Ajin V.; Yang, Yong; Li, Yongwang
• Is Part Of: ChemistrySelect. Volume 2:Issue 11(2017)
• Page Start: 3356
• Page End: 3361
• Publication Date: 2017-04-19
• Subjects: Fayalite -- Nanomaterial -- Olivine -- Silicates -- Solid-phase synthesis; Chemistry -- Periodicals; 540.5
• DOI: 10.1002/slct.201700047
• Languages: English
• ISSNs: 2365-6549

Abstract

Abstract: Fayalite has been found various applications in many fields. However, it is scarce in Earth's crust. Most of the preparation methods reported earlier are slightly rigorous or complicated and mainly used for preparing large crystal or single crystal fayalite. Because of the potential applications in the field of functional materials and catalysis, nanoscale fayalite would be interesting and attractive. Herein we designed a new method to synthesize nanoscale α‐Fe2 SiO4 via a H2 ‐assisted gas‐solid reaction. We have used three different approaches based on the above method. The highly dispersed precursor, which was prepared by a continuous co‐precipitation method, was heated to a phase‐transition temperature (∼600 °C) under H2 atmosphere to synthesize nanoscale α‐Fe2 SiO4 . The fayalites were characterized by XAD, XAS and FT‐IR. Comparing with the earlier reported methods, our method largely reduces the reaction temperature, and facilitates large scale synthesis of nanoscale fayalite. It is found that the well distribution of Fe−O and Si−O domains in a nanometer scale plays an important role in the preparation. Abstract : A new method was designed to synthesize nanoscale fayalite in a large scale, and three approaches were presented. The highly dispersed nature of precursor is the key factor for successful preparation. Comparing with previously reported methods, our method largely reduced the reaction temperature, and was easy to implement. The nanoscale α‐Fe2 SiO4 could have potential applications in the field of functional material and catalysis.