Recent developments in the application of nanoparticles prepared from w/o microemulsions in heterogeneous catalysis

Review on Dye Removal from Its Aqueous Solution into Alternative Cost Effective and Non-Conventional Adsorbents

“…Surfactant and co-surfactant are used to thermodynamically stabilise the mixture and form a clear and totally soluble solution. Water droplets are slowly dispersed and collided in the oil and surfactant solution forming a nano reactor which is driven by the Brownian motion [48,49]. Saha et al,(2011) have reported the removal of different dyes such as erichrome black-T, bromophenol blue and bromocresol green using iron oxide nanoparticles which are ferromagnetic in nature at both room and low temperature [50].Also, ZnFe2O4 spinel ferrite nanoparticles has been successfully used in the removal of Acid Red 88 dye from aqueous solution by adsorption [51].…”

Surfactant effects on the microstructures of Fe3O4 nanoparticles synthesized by microemulsion method

“…When two water nanodroplets collide, which are driven by the Brownian motion, they fuse and interchange reactants [24]. Since the chemical reaction is limited to the nuclear interior in water, the microemulsion method has obvious advantages to manipulate the particles size and shape, also to regulate narrow particle size distribution by controlling the amount of the mixture oil/water/surfactant [25,26].…”

New Trends on the Synthesis of Inorganic Nanoparticles Using Microemulsions as Confined Reaction Media

“…Numerous investigations have been published about the use of W/O microemulsions for the preparation of a variety of nanomaterials, such as metallic and bimetallic nanoparticles, single metal oxide as well as mixed oxides, quantum dots, and even complex ceramic materials (Boutonnet et al, 1982;Destrée & Nagy, 2006;Eastoe et al 2006;Holmberg, 2004;López-Quintela et al 2004;Pileni 1997 and. Materials synthesized in w/o microemulsions exhibit unique surface properties; for example, nano-catalysts prepared by this method show better performance (activity, selectivity) than those prepared by other methods (Boutonnet et al 2008). In spite of the superior properties and performance of nanoparticles obtained in w/o microemulsions, this method has not found good acceptance at the industrial level, mainly due to the employment of large amounts of oils (solvents) which represent the continuous and hence main component of these systems.…”