On the Synthesis of Molybdenum Nanoparticles under Reducing Conditions in Ionic Liquids

Abstract

We report on attempts to synthesize Mo nanoparticles under reducing conditions in ionic liquids (ILs). Ionic liquids were based on the 1-ethyl-3-methylimidazolium or 1-butyl-3-methylimidazolium (Emim and Bmim, resp.) cations and the dicyanamide N(CN)2, triflate (OTf), bis(trifluoromethylsulfonyl)imide-(NTf2), tetrafluoroborate (BF4), ethyl sulfate (ES), and methylsulfonate (MS) anions. (NH4)6Mo7O24∗4H2O and NaBH4 were reacted in a set of imidazolium ionic liquids (ILs) at 180°C to evaluate the potential of the ILs for stabilization of metallic Mo nanoparticles. XRD and TEM reveal a strong influence of the IL anion on the particle sizes, shapes, and crystal structures. The influence of the IL cation and the reaction temperature is much less pronounced.

Nano/Micro-Structured Materials: Synthesis, Morphology and Applications

“…In continuation of the work on anion effects on nanoparticles formation, stable Mo and molybdenum oxide nano-and microparticles were synthesized in ILs with a variety of anions under reducing conditions by Ayi and co-workers [41]. XRD and TEM revealed a strong influence of the IL anion on the particle sizes, shapes, and crystal structures.…”

On the use of methylimidazolium acetate ionic liquids as solvent and stabilizer in the synthesis of cobalt nanoparticles by chemical reduction method

“…The use of ionic liquids (ILs) in the synthesis of inorganic nanomaterials has received great attention [1][2][3][4][5][6][7], not only for being environmentally benign solvent, but also for ease of preparing complex inorganic materials that cannot be made using conventional solvents [8][9][10][11]. Ionic liquids (ILs) can stabilize metal and metal oxide nanoparticles through their high ionic charge, their polarity and high dielectric constants [12][13][14][15][16].…”

Green synthesis of silver monometallic and copper-silver bimetallic nanoparticles using Kigelia africana fruit extract and evaluation of their antimicrobial activities

“…Consequently, a number of studies are geared towards development of suitable protocols for the rational synthesis of metal and/or bimetallic nanoparticles in an eco-friendly approach. A number of physio-chemical techniques involving chemical reduction (Park et al, 2008;Ayi et al, 2010Ayi et al, , 2015Khan et al, 2011a), gamma ray radiation (Chen et al, 2007), micro emulsion (Zhang et al, 2006), electrochemical method (Reicha et al, 2012), laser ablation (Abid et al, 2002), autoclave (Yang and Pan, 2012), microwave (Khan et al, 2011b) and photochemical reduction (Alarcon et al, 2012) are commonly employed in the synthesis of metal and/or bimetallic nanoparticles. Although these methods have been quite effective, the risks associated with the use of toxic chemicals as well as high operational cost and energy requirement have limited their use.…”