Synthesis of Nanoscale Co₃[Co(CN)₆]₂ in Reverse Microemulsions

Abstract

The aim of this study is the synthesis of nanoscale, nonagglomerated, and redispersible Co 3 [Co(CN) 6 ] 2 nanoparticles via a microemulsion approach. Furthermore, the micellar system is heated to reflux to enhance materials crystallinity. Crystallinity, chemical composition, and optical and thermal properties of the title compound are investigated in detail. SEM, XRD, and DLS measurements evidence an average diameter of 25-30 nm of the as-prepared nanocrystals as well as of powder samples subsequent to centrifugation, washing, drying, and resuspension. Based on IR and UV-vis spectra, the anhydrous character of Co 3 [Co(CN) 6 ] 2 is validated. The thermal decomposition of Co 3 [Co(CN) 6 ] 2 results in the formation of Co 3 O 4 , which is still nanoscaled.

Multi-scale crystal engineering of metal organic frameworks

“…These first findings on metal-cyanide framework nanoparticles prompted the use of similar reverse microemulsion systems to tune the particle size and/or shape of other Prussian blue analogues, such as K [230][231][232], and metal-organic frameworks [184,[233][234][235][236].…”

Microemulsion Approach to Non‐Agglomerated and Crystalline Nanomaterials

“…[23] 3. Size, Size Distribution, and Crystallinity of the As-Prepared Materials Scanning electron microscopy (SEM) images of the as-prepared ZnO, (NH 4 3 6 ] 2 ), and 41 nm (K 3 [Co(NO 2 ) 6 ]).…”

Effect of the thermodynamic properties of W/O microemulsions on samarium oxide nanoparticle size

“…Most recent efforts have been directed to develop efficient synthetic techniques by which the size and shape of nanoparticles can be accurately controlled [1][2][3][4][5]. Among these synthetic techniques, microemulsion synthesis is particularly versatile in producing nanoparticles of controlled size and size distribution, uniform shape, and low agglomeration degree [6].…”