title: Using hydrophilic ionic liquid, [bmim]BF4-ethylene glycol system as a novel media for the rapid synthesis of copper nanoparticles.
abstract: In this work, we present a novel method for the synthesis of copper nanoparticles. We utilize the charge compensatory effect of ionic liquid [bmim]BF(4) in conjunction with ethylene glycol for providing electro-steric stabilization to copper nanoparticles prepared from copper sulphate using hydrazine hydrate as a reducing agent. The formed copper nanoparticles showed extended stability over a period of one year. Copper nanoparticles thus prepared were characterized by powder X-ray diffraction measurements (pXRD), transmission electron microscopy (TEM) and quasi elastic light scattering (QELS) techniques. Powder X-ray diffraction (pXRD) analysis revealed relevant Bragg's reflection for crystal structure of copper. Powder X-ray diffraction plots also revealed no oxidized material of copper nanoparticles. TEM showed nearly uniform distribution of the particles in methanol and confirmed by QELS. Typical applications of copper nanoparticles include uses in conductive films, lubrication and nanofluids. Currently efforts are under way in our laboratory for using these nanoparticles as catalysts for a variety of organic reactions.
authors.affiliation: Department of Chemistry, University of Delhi, Delhi, India.
authors.forename: Manika
authors.initials: M
authors.lastname: Dewan
authors.forename: Ajeet
authors.initials: A
authors.lastname: Kumar
authors.forename: Amit
authors.initials: A
authors.lastname: Saxena
authors.forename: Arnab
authors.initials: A
authors.lastname: De
authors.forename: Subho
authors.initials: S
authors.lastname: Mozumdar
mesh_terms: D002021:Buffers; D002384:Catalysis / Q000187:drug effects; D003300:Copper / Q000737:chemistry*; D019855:Ethylene Glycol / Q000737:chemistry / Q000494:pharmacology*; D006801:Humans; D057927:Hydrophobic and Hydrophilic Interactions; D007093:Imidazoles / Q000737:chemistry / Q000494:pharmacology*; D052578:Ionic Liquids / Q000737:chemistry / Q000494:pharmacology*; D053768:Metal Nanoparticles / Q000737:chemistry* / Q000648:ultrastructure; D046529:Microscopy, Electron, Transmission; D008954:Models, Biological; D010316:Particle Size; D011208:Powders / Q000138:chemical synthesis* / Q000737:chemistry; D013997:Time Factors; D014961:X-Ray Diffraction
chemical_list: C419324:1-butyl-3-methylimidazolium tetrafluoroborate; D002021:Buffers; D007093:Imidazoles; D052578:Ionic Liquids; D011208:Powders; D003300:Copper; D019855:Ethylene Glycol